(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}(g.SwaggerTools || (g.SwaggerTools = {})).specs = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Apigee Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

'use strict';

var _ = require('lodash');
var JsonRefs = require('json-refs');
var traverse = require('traverse');
var ZSchema = require('z-schema');

var customJsonSchemaFormats = ['byte', 'double', 'float', 'int32', 'int64', 'mime-type', 'uri-template'];
var draft04Json = require('../schemas/json-schema-draft-04.json');
var draft04Url = 'http://json-schema.org/draft-04/schema';
var specCache = {};

module.exports.registerCustomFormats = function (json) {
  traverse(json).forEach(function () {
    var name = this.key;
    var format = this.node;

    if (name === 'format' && _.indexOf(ZSchema.getRegisteredFormats(), format) === -1) {
      ZSchema.registerFormat(format, function () {
        return true;
      });
    }
  });
};

module.exports.createJsonValidator = function (schemas) {
  var validator = new ZSchema({
    breakOnFirstError: false,
    reportPathAsArray: true
  });
  var result;

  // Add the draft-04 spec
  validator.setRemoteReference(draft04Url, draft04Json);

  // Swagger uses some unsupported/invalid formats so just make them all pass
  _.each(customJsonSchemaFormats, function (format) {
    ZSchema.registerFormat(format, function () {
      return true;
    });
  });

  // Compile and validate the schemas
  if (!_.isUndefined(schemas)) {
    result = validator.compileSchema(schemas);

    // If there is an error, it's unrecoverable so just blow the eff up
    if (result === false) {
      console.error('JSON Schema file' + (schemas.length > 1 ? 's are' : ' is') + ' invalid:');

      _.each(validator.getLastErrors(), function (err) {
        console.error('  ' + (_.isArray(err.path) ? JsonRefs.pathToPtr(err.path) : err.path) + ': ' + err.message);
      });

      throw new Error('Unable to create validator due to invalid JSON Schema');
    }
  }

  return validator;
};

module.exports.formatResults = function (results) {
  if (results) {
    // Update the results based on its content to indicate success/failure accordingly
    results = (results.errors.length + results.warnings.length +
    _.reduce(results.apiDeclarations, function (count, aResult) {
      if (aResult) {
        count += aResult.errors.length + aResult.warnings.length;
      }

      return count;
    }, 0) > 0) ? results : undefined;
  }

  return results;
};

var getErrorCount = module.exports.getErrorCount = function (results) {
  var errors = 0;

  if (results) {
    errors = results.errors.length;

    _.each(results.apiDeclarations, function (adResults) {
      if (adResults) {
        errors += adResults.errors.length;
      }
    });
  }

  return errors;
};

var coerceVersion = function (version) {
  // Convert the version to a number (Required for helpers.getSpec)
  if (version && !_.isString(version)) {
    version = version.toString();

    // Handle rounding issues (Only required for when Swagger version ends in '.0')
    if (version.indexOf('.') === -1) {
      version += '.0';
    }
  }

  return version;
};

/**
 * Returns the proper specification based on the human readable version.
 *
 * @param {string} version - The human readable Swagger version (Ex: 1.2)
 * @param {[boolean=false]} throwError - Throw an error if the version could not be identified
 *
 * @returns the corresponding Swagger Specification object or undefined if there is none
 */
module.exports.getSpec = function (version, throwError) {
  var spec;

  version = coerceVersion(version);
  spec = specCache[version];

  if (_.isUndefined(spec)) {
    switch (version) {
    case '1.2':
      spec = require('../lib/specs').v1_2; // jshint ignore:line

      break;

    case '2.0':
      spec = require('../lib/specs').v2_0; // jshint ignore:line

      break;

    default:
      if (throwError === true) {
        throw new Error('Unsupported Swagger version: ' + version);
      }
    }
  }

  return spec;
};

/**
 * Atempts to figure out the Swagger version from the Swagger document.
 *
 * @param {object} document - The Swagger document
 *
 * @returns the Swagger version or undefined if the document is not a Swagger document
 */
module.exports.getSwaggerVersion = function (document) {
  return _.isPlainObject(document) ? coerceVersion(document.swaggerVersion || document.swagger) : undefined;
};

module.exports.printValidationResults = function (version, apiDOrSO, apiDeclarations, results, printSummary) {
  var hasErrors = getErrorCount(results) > 0;
  var stream = hasErrors ? console.error : console.log;
  var pluralize = function (string, count) {
    return count === 1 ? string : string + 's';
  };
  var printErrorsOrWarnings = function (header, entries, indent) {
    if (header) {
      stream(header + ':');
      stream();
    }

    _.each(entries, function (entry) {
      stream(new Array(indent + 1).join(' ') + JsonRefs.pathToPtr(entry.path) + ': ' + entry.message);

      if (entry.inner) {
        printErrorsOrWarnings (undefined, entry.inner, indent + 2);
      }
    });

    if (header) {
      stream();
    }
  };
  var errorCount = 0;
  var warningCount = 0;

  stream();

  if (results.errors.length > 0) {
    errorCount += results.errors.length;

    printErrorsOrWarnings('API Errors', results.errors, 2);
  }

  if (results.warnings.length > 0) {
    warningCount += results.warnings.length;

    printErrorsOrWarnings('API Warnings', results.warnings, 2);
  }

  if (results.apiDeclarations) {
    results.apiDeclarations.forEach(function (adResult, index) {
      if (!adResult) {
        return;
      }

      var name = apiDeclarations[index].resourcePath || index;

      if (adResult.errors.length > 0) {
        errorCount += adResult.errors.length;

        printErrorsOrWarnings('  API Declaration (' + name + ') Errors', adResult.errors, 4);
      }

      if (adResult.warnings.length > 0) {
        warningCount += adResult.warnings.length;

        printErrorsOrWarnings('  API Declaration (' + name + ') Warnings', adResult.warnings, 4);
      }
    });
  }

  if (printSummary) {
    if (errorCount > 0) {
      stream(errorCount + ' ' + pluralize('error', errorCount) + ' and ' + warningCount + ' ' +
                    pluralize('warning', warningCount));
    } else {
      stream('Validation succeeded but with ' + warningCount + ' ' + pluralize('warning', warningCount));
    }
  }

  stream();
};

module.exports.swaggerOperationMethods = [
  'DELETE',
  'GET',
  'HEAD',
  'OPTIONS',
  'PATCH',
  'POST',
  'PUT'
];

},{"../lib/specs":2,"../schemas/json-schema-draft-04.json":205,"json-refs":57,"lodash":87,"traverse":106,"z-schema":190}],2:[function(require,module,exports){
(function (global){
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Apigee Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

'use strict';

var _ = require('lodash');
var async = require('async');
var helpers = require('./helpers');
var JsonRefs = require('json-refs');
var SparkMD5 = require('spark-md5');
var swaggerConverter = require('swagger-converter');
var traverse = require('traverse');
var validators = require('./validators');
var YAML = require('js-yaml');

// Work around swagger-converter packaging issue (Browser builds only)
if (_.isPlainObject(swaggerConverter)) {
  swaggerConverter = global.SwaggerConverter.convert;
}

var documentCache = {};

var sanitizeRef = function (version, ref) {
  return version !== '1.2' ? ref : ref.replace('#/models/', '');
};

var swagger1RefPreProcesor = function (obj) {
  var pObj = _.cloneDeep(obj);

  pObj.$ref = '#/models/' + obj.$ref;

  return pObj;
};
var validOptionNames = _.map(helpers.swaggerOperationMethods, function (method) {
  return method.toLowerCase();
});

var isRemotePtr = function (refDetails) {
  return ['relative', 'remote'].indexOf(refDetails.type) > -1;
};

var createErrorOrWarning = function (code, message, path, dest) {
  dest.push({
    code: code,
    message: message,
    path: path
  });
};

var addReference = function (cacheEntry, defPathOrPtr, refPathOrPtr, results, omitError) {
  var result = true;
  var swaggerVersion = helpers.getSwaggerVersion(cacheEntry.resolved);
  var defPath = _.isArray(defPathOrPtr) ? defPathOrPtr : JsonRefs.pathFromPtr(defPathOrPtr);
  var defPtr = _.isArray(defPathOrPtr) ? JsonRefs.pathToPtr(defPathOrPtr) : defPathOrPtr;
  var refPath = _.isArray(refPathOrPtr) ? refPathOrPtr : JsonRefs.pathFromPtr(refPathOrPtr);
  var refPtr = _.isArray(refPathOrPtr) ? JsonRefs.pathToPtr(refPathOrPtr) : refPathOrPtr;
  var code;
  var def;
  var displayId;
  var i;
  var msgPrefix;
  var type;

  def = cacheEntry.definitions[defPtr];
  type = defPath[0];
  code = type === 'securityDefinitions' ?
    'SECURITY_DEFINITION' :
    type.substring(0, type.length - 1).toUpperCase();
  displayId = swaggerVersion === '1.2' ? defPath[defPath.length - 1] : defPtr;
  msgPrefix = type === 'securityDefinitions' ?
    'Security definition' :
    code.charAt(0) + code.substring(1).toLowerCase();

  // This is an authorization scope reference
  if (['authorizations', 'securityDefinitions'].indexOf(defPath[0]) > -1 && defPath[2] === 'scopes') {
    code += '_SCOPE';
    msgPrefix += ' scope';
  }

  // If the reference was not found and this is not an authorization/security scope reference, attempt to find a
  // parent object to add the reference too.  (Issue 176)
  if (_.isUndefined(def) && ['AUTHORIZATION_SCOPE', 'SECURITY_DEFINITION_SCOPE'].indexOf(code) === -1) {
    // Attempt to find the definition in case the reference is to a path within a definition`
    for (i = 1; i < defPath.length; i++) {
      var pPath = defPath.slice(0, defPath.length - i);
      var pPtr = JsonRefs.pathToPtr(pPath);
      var pDef = cacheEntry.definitions[pPtr];

      if (!_.isUndefined(pDef)) {
        def = pDef;

        break;
      }
    }
  }

  if (_.isUndefined(def)) {
    if (!omitError) {
      if (cacheEntry.swaggerVersion !== '1.2' && ['SECURITY_DEFINITION', 'SECURITY_DEFINITION_SCOPE'].indexOf(code) === -1) {
        refPath.push('$ref');
      }

      createErrorOrWarning('UNRESOLVABLE_' + code, msgPrefix + ' could not be resolved: ' + displayId, refPath,
                           results.errors);
    }

    result = false;
  } else {
    if (_.isUndefined(def.references)) {
      def.references = [];
    }

    def.references.push(refPtr);
  }

  return result;
};

var getOrComposeSchema = function (documentMetadata, modelId) {
  var title = 'Composed ' + (documentMetadata.swaggerVersion === '1.2' ?
                               JsonRefs.pathFromPtr(modelId).pop() :
                               modelId);
  var metadata = documentMetadata.definitions[modelId];
  var originalT = traverse(documentMetadata.original);
  var resolvedT = traverse(documentMetadata.resolved);
  var composed;
  var original;

  if (!metadata) {
    return undefined;
  }

  original = _.cloneDeep(originalT.get(JsonRefs.pathFromPtr(modelId)));
  composed = _.cloneDeep(resolvedT.get(JsonRefs.pathFromPtr(modelId)));

  // Convert the Swagger 1.2 document to a valid JSON Schema file
  if (documentMetadata.swaggerVersion === '1.2') {
    // Create inheritance model
    if (metadata.lineage.length > 0) {
      composed.allOf = [];

      _.each(metadata.lineage, function (modelId) {
        composed.allOf.push(getOrComposeSchema(documentMetadata, modelId));
      });
    }

    // Remove the subTypes property
    delete composed.subTypes;

    _.each(composed.properties, function (property, name) {
      var oProp = original.properties[name];

      // Convert the string values to numerical values
      _.each(['maximum', 'minimum'], function (prop) {
        if (_.isString(property[prop])) {
          property[prop] = parseFloat(property[prop]);
        }
      });

      _.each(JsonRefs.findRefs(oProp, {
        includeInvalid: true,
        refPreProcessor: swagger1RefPreProcesor
      }), function (refDetails, refPtr) {
        var dMetadata = documentMetadata.definitions[refDetails.uri];
        var path = JsonRefs.pathFromPtr(refPtr);

        if (dMetadata.lineage.length > 0) {
          traverse(property).set(path, getOrComposeSchema(documentMetadata, refDetails.uri));
        } else {
          traverse(property).set(path.concat('title'), 'Composed ' + sanitizeRef(documentMetadata.swaggerVersion,
                                                                                 refDetails.uri));
        }
      });
    });
  }

  // Scrub id properties
  composed = traverse(composed).map(function (val) {
    if (this.key === 'id' && _.isString(val)) {
      this.remove();
    }
  });

  composed.title = title;

  return composed;
};

var createUnusedErrorOrWarning = function (val, codeSuffix, msgPrefix, path, dest) {
  createErrorOrWarning('UNUSED_' + codeSuffix, msgPrefix + ' is defined but is not used: ' + val, path, dest);
};

var getDocumentCache = function (apiDOrSO) {
  var key = SparkMD5.hash(JSON.stringify(apiDOrSO));
  var cacheEntry = documentCache[key] || _.find(documentCache, function (cacheEntry) {
    return cacheEntry.resolvedId === key;
  });

  if (!cacheEntry) {
    cacheEntry = documentCache[key] = {
      definitions: {},
      original: apiDOrSO,
      resolved: undefined,
      swaggerVersion: helpers.getSwaggerVersion(apiDOrSO)
    };
  }

  return cacheEntry;
};

var handleValidationError = function (results, callback) {
  var err = new Error('The Swagger document(s) are invalid');

  err.errors = results.errors;
  err.failedValidation = true;
  err.warnings = results.warnings;

  if (results.apiDeclarations) {
    err.apiDeclarations = results.apiDeclarations;
  }

  callback(err);
};

var normalizePath = function (path) {
  var matches = path.match(/\{(.*?)\}/g);
  var argNames = [];
  var normPath = path;

  if (matches) {
    _.each(matches, function (match, index) {
      normPath = normPath.replace(match, '{' + index + '}');
      argNames.push(match.replace(/[{}]/g, ''));
    });
  }

  return {
    path: normPath,
    args: argNames
  };
};

var removeCirculars = function (obj) {
  function walk (ancestors, node, path) {
    function walkItem (item, segment) {
      path.push(segment);
      walk(ancestors, item, path);
      path.pop();
    }

    // We do not process circular objects again
    if (ancestors.indexOf(node) === -1) {
      ancestors.push(node);

      if (_.isArray(node)) {
        _.each(node, function (member, index) {
          walkItem(member, index.toString());
        });
      } else if (_.isPlainObject(node)) {
        _.forOwn(node, function (member, key) {
          walkItem(member, key.toString());
        });
      }
    } else {
      _.set(obj, path, {});
    }

    ancestors.pop();
  }

  walk([], obj, []);
};


var validateNoExist = function (data, val, codeSuffix, msgPrefix, path, dest) {
  if (!_.isUndefined(data) && data.indexOf(val) > -1) {
    createErrorOrWarning('DUPLICATE_' + codeSuffix, msgPrefix + ' already defined: ' + val, path, dest);
  }
};

var validateSchemaConstraints = function (documentMetadata, schema, path, results, skip) {
  try {
    validators.validateSchemaConstraints(documentMetadata.swaggerVersion, schema, path, undefined);
  } catch (err) {
    if (!skip) {
      createErrorOrWarning(err.code, err.message, err.path, results.errors);
    }
  }
};

var processDocument = function (documentMetadata, results) {
  var swaggerVersion = documentMetadata.swaggerVersion;
  var getDefinitionMetadata = function (defPath, inline) {
    var defPtr = JsonRefs.pathToPtr(defPath);
    var metadata = documentMetadata.definitions[defPtr];

    if (!metadata) {
      metadata = documentMetadata.definitions[defPtr] = {
        inline: inline || false,
        references: []
      };

      // For model definitions, add the inheritance properties
      if (['definitions', 'models'].indexOf(JsonRefs.pathFromPtr(defPtr)[0]) > -1) {
        metadata.cyclical = false;
        metadata.lineage = undefined;
        metadata.parents = [];
      }
    }

    return metadata;
  };
  var getDisplayId = function (id) {
    return swaggerVersion === '1.2' ? JsonRefs.pathFromPtr(id).pop() : id;
  };
  var jsonRefsOptions = {
    filter: 'local',
    includeInvalid: true
  };
  var walk = function (root, id, lineage) {
    var definition = documentMetadata.definitions[id || root];

    if (definition) {
      _.each(definition.parents, function (parent) {
        lineage.push(parent);

        if (root !== parent) {
          walk(root, parent, lineage);
        }
      });
    }
  };
  var authDefsProp = swaggerVersion === '1.2' ? 'authorizations' : 'securityDefinitions';
  var modelDefsProp = swaggerVersion === '1.2' ? 'models' : 'definitions';

  // Process authorization definitions
  _.each(documentMetadata.resolved[authDefsProp], function (authorization, name) {
    var securityDefPath = [authDefsProp, name];

    // Swagger 1.2 only has authorization definitions in the Resource Listing
    if (swaggerVersion === '1.2' && !authorization.type) {
      return;
    }

    // Create the authorization definition metadata
    getDefinitionMetadata(securityDefPath);

    _.reduce(authorization.scopes, function (seenScopes, scope, indexOrName) {
      var scopeName = swaggerVersion === '1.2' ? scope.scope : indexOrName;
      var scopeDefPath = securityDefPath.concat(['scopes', indexOrName.toString()]);
      var scopeMetadata = getDefinitionMetadata(securityDefPath.concat(['scopes', scopeName]));

      scopeMetadata.scopePath = scopeDefPath;

      // Identify duplicate authorization scope defined in the Resource Listing
      validateNoExist(seenScopes, scopeName, 'AUTHORIZATION_SCOPE_DEFINITION', 'Authorization scope definition',
                      swaggerVersion === '1.2' ? scopeDefPath.concat('scope') : scopeDefPath, results.warnings);

      seenScopes.push(scopeName);

      return seenScopes;
    }, []);
  });

  // Process model definitions
  _.each(documentMetadata.resolved[modelDefsProp], function (model, modelId) {
    var modelDefPath = [modelDefsProp, modelId];
    var modelMetadata = getDefinitionMetadata(modelDefPath);

    // Identify model id mismatch (Id in models object is not the same as the model's id in the models object)
    if (swaggerVersion === '1.2' && modelId !== model.id) {
      createErrorOrWarning('MODEL_ID_MISMATCH', 'Model id does not match id in models object: ' + model.id,
                           modelDefPath.concat('id'), results.errors);
    }

    // Do not reprocess parents/references if already processed
    if (_.isUndefined(modelMetadata.lineage)) {
      // Handle inheritance references
      switch (swaggerVersion) {
      case '1.2':
        _.each(model.subTypes, function (subType, index) {
          var subPath = ['models', subType];
          var subPtr = JsonRefs.pathToPtr(subPath);
          var subMetadata = documentMetadata.definitions[subPtr];
          var refPath = modelDefPath.concat(['subTypes', index.toString()]);

          // If the metadata does not yet exist, create it
          if (!subMetadata && documentMetadata.resolved[modelDefsProp][subType]) {
            subMetadata = getDefinitionMetadata(subPath);
          }

          // If the reference is valid, add the parent
          if (addReference(documentMetadata, subPath, refPath, results)) {
            subMetadata.parents.push(JsonRefs.pathToPtr(modelDefPath));
          }
        });

        break;

      default:
        _.each(documentMetadata.original[modelDefsProp][modelId].allOf, function (schema, index) {
          var isInline = false;
          var parentPath;

          if (_.isUndefined(schema.$ref) || isRemotePtr(JsonRefs.getRefDetails(schema))) {
            isInline = true;
            parentPath = modelDefPath.concat(['allOf', index.toString()]);
          } else {
            parentPath = JsonRefs.pathFromPtr(schema.$ref);
          }

          // If the parent model does not exist, do not create its metadata
          if (!_.isUndefined(traverse(documentMetadata.resolved).get(parentPath))) {
            // Create metadata for parent
            getDefinitionMetadata(parentPath, isInline);

            modelMetadata.parents.push(JsonRefs.pathToPtr(parentPath));
          }
        });

        break;
      }
    }
  });

  switch (swaggerVersion) {
  case '2.0':
    // Process parameter definitions
    _.each(documentMetadata.resolved.parameters, function (parameter, name) {
      var path = ['parameters', name];

      getDefinitionMetadata(path);

      validateSchemaConstraints(documentMetadata, parameter, path, results);
    });

    // Process response definitions
    _.each(documentMetadata.resolved.responses, function (response, name) {
      var path = ['responses', name];

      getDefinitionMetadata(path);

      validateSchemaConstraints(documentMetadata, response, path, results);
    });

    break;
  }

  // Validate definition/models (Inheritance, property definitions, ...)
  _.each(documentMetadata.definitions, function (metadata, id) {
    var defPath = JsonRefs.pathFromPtr(id);
    var definition = traverse(documentMetadata.original).get(defPath);
    var defProp = defPath[0];
    var code = defProp.substring(0, defProp.length - 1).toUpperCase();
    var msgPrefix = code.charAt(0) + code.substring(1).toLowerCase();
    var dProperties;
    var iProperties;
    var lineage;

    // The only checks we perform below are inheritance checks so skip all non-model definitions
    if (['definitions', 'models'].indexOf(defProp) === -1) {
      return;
    }

    dProperties = [];
    iProperties = [];
    lineage = metadata.lineage;

    // Do not reprocess lineage if already processed
    if (_.isUndefined(lineage)) {
      lineage = [];

      walk(id, undefined, lineage);

      // Root > next > ...
      lineage.reverse();

      metadata.lineage = _.cloneDeep(lineage);

      metadata.cyclical = lineage.length > 1 && lineage[0] === id;
    }

    // Swagger 1.2 does not allow multiple inheritance while Swagger 2.0+ does
    if (metadata.parents.length > 1 && swaggerVersion === '1.2') {
      createErrorOrWarning('MULTIPLE_' + code + '_INHERITANCE',
                           'Child ' + code.toLowerCase() + ' is sub type of multiple models: ' +
                           _.map(metadata.parents, function (parent) {
                             return getDisplayId(parent);
                           }).join(' && '), defPath, results.errors);
    }

    if (metadata.cyclical) {
      createErrorOrWarning('CYCLICAL_' + code + '_INHERITANCE',
                           msgPrefix + ' has a circular inheritance: ' +
                             _.map(lineage, function (dep) {
                               return getDisplayId(dep);
                             }).join(' -> ') + ' -> ' + getDisplayId(id),
                            defPath.concat(swaggerVersion === '1.2' ? 'subTypes' : 'allOf'), results.errors);
    }

    // Remove self reference from the end of the lineage (Front too if cyclical)
    _.each(lineage.slice(metadata.cyclical ? 1 : 0), function (id) {
      var pModel = traverse(documentMetadata.resolved).get(JsonRefs.pathFromPtr(id));

      _.each(Object.keys(pModel.properties || {}), function (name) {
        if (iProperties.indexOf(name) === -1) {
          iProperties.push(name);
        }
      });
    });

    // Validate simple definitions
    validateSchemaConstraints(documentMetadata, definition, defPath, results);

    // Identify redeclared properties
    _.each(definition.properties, function (property, name) {
      var pPath = defPath.concat(['properties', name]);

      // Do not process unresolved properties
      if (!_.isUndefined(property)) {
        validateSchemaConstraints(documentMetadata, property, pPath, results);

        if (iProperties.indexOf(name) > -1) {
          createErrorOrWarning('CHILD_' + code + '_REDECLARES_PROPERTY',
                               'Child ' + code.toLowerCase() + ' declares property already declared by ancestor: ' +
                               name,
                               pPath, results.errors);
        } else {
          dProperties.push(name);
        }
      }
    });

    // Identify missing required properties
    _.each(definition.required || [], function (name, index) {
      var type = swaggerVersion === '1.2' ? 'Model' : 'Definition';

      if (iProperties.indexOf(name) === -1 && dProperties.indexOf(name) === -1) {
        createErrorOrWarning('MISSING_REQUIRED_' + type.toUpperCase() + '_PROPERTY',
                             type + ' requires property but it is not defined: ' + name,
                             defPath.concat(['required', index.toString()]), results.errors);
      }
    });
  });

  if (documentMetadata.swaggerVersion === '1.2') {
    jsonRefsOptions.refPreProcessor = swagger1RefPreProcesor;
  }

  // Process local references
  _.each(JsonRefs.findRefs(documentMetadata.original, jsonRefsOptions), function (refDetails, refPtr) {
    addReference(documentMetadata, refDetails.uri, refPtr, results);
  });

  // Process invalid references
  _.each(documentMetadata.referencesMetadata, function (refDetails, refPtr) {
    if (isRemotePtr(refDetails) && refDetails.missing === true) {
      results.errors.push({
        code: 'UNRESOLVABLE_REFERENCE',
        message: 'Reference could not be resolved: ' + sanitizeRef(documentMetadata.swaggerVersion, refDetails.uri),
        path: JsonRefs.pathFromPtr(refPtr).concat('$ref')
      });
    }
  });
};

var validateExist = function (data, val, codeSuffix, msgPrefix, path, dest) {
  if (!_.isUndefined(data) && data.indexOf(val) === -1) {
    createErrorOrWarning('UNRESOLVABLE_' + codeSuffix, msgPrefix + ' could not be resolved: ' + val, path, dest);
  }
};

var processAuthRefs = function (documentMetadata, authRefs, path, results) {
  var code = documentMetadata.swaggerVersion === '1.2' ? 'AUTHORIZATION' : 'SECURITY_DEFINITION';
  var msgPrefix = code === 'AUTHORIZATION' ? 'Authorization' : 'Security definition';

  if (documentMetadata.swaggerVersion === '1.2') {
    _.reduce(authRefs, function (seenNames, scopes, name) {
      var authPtr = ['authorizations', name];
      var aPath = path.concat([name]);

      // Add reference or record unresolved authorization
      if (addReference(documentMetadata, authPtr, aPath, results)) {
        _.reduce(scopes, function (seenScopes, scope, index) {
          var sPath = aPath.concat(index.toString(), 'scope');
          var sPtr = authPtr.concat(['scopes', scope.scope]);

          validateNoExist(seenScopes, scope.scope, code + '_SCOPE_REFERENCE', msgPrefix + ' scope reference', sPath,
                          results.warnings);

          // Add reference or record unresolved authorization scope
          addReference(documentMetadata, sPtr, sPath, results);

          return seenScopes.concat(scope.scope);
        }, []);
      }

      return seenNames.concat(name);
    }, []);
  } else {
    _.reduce(authRefs, function (seenNames, scopes, index) {
      _.each(scopes, function (scopes, name) {
        var authPtr = ['securityDefinitions', name];
        var authRefPath = path.concat(index.toString(), name);

        // Ensure the security definition isn't referenced more than once (Swagger 2.0+)
        validateNoExist(seenNames, name, code + '_REFERENCE', msgPrefix + ' reference', authRefPath,
                        results.warnings);

        seenNames.push(name);

        // Add reference or record unresolved authorization
        if (addReference(documentMetadata, authPtr, authRefPath, results)) {
          _.each(scopes, function (scope, index) {
            // Add reference or record unresolved authorization scope
            var sPtr = authPtr.concat(['scopes', scope]);
            addReference(documentMetadata, sPtr, authRefPath.concat(index.toString()),
                         results);
          });
        }
      });

      return seenNames;
    }, []);
  }
};

var resolveRefs = function (apiDOrSO, callback) {
  var cacheEntry = getDocumentCache(apiDOrSO);
  var swaggerVersion = helpers.getSwaggerVersion(apiDOrSO);
  var jsonRefsOptions = {
    includeInvalid: true,
    loaderOptions: {
      processContent: function (res, callback) {
        callback(undefined, YAML.safeLoad(res.text));
      }
    }
  };

  if (!cacheEntry.resolved) {
    // For Swagger 1.2, we have to create real JSON References
    if (swaggerVersion === '1.2') {
      jsonRefsOptions.refPreProcessor = swagger1RefPreProcesor;
    }

    // Resolve references
    JsonRefs.resolveRefs(apiDOrSO, jsonRefsOptions)
      .then(function (results) {
        removeCirculars(results.resolved);

        // Fix circular references
        _.each(results.refs, function (refDetails, refPtr) {
          if (refDetails.circular) {
            _.set(results.resolved, JsonRefs.pathFromPtr(refPtr), {});
          }
        });

        cacheEntry.referencesMetadata = results.refs;
        cacheEntry.resolved = results.resolved;
        cacheEntry.resolvedId = SparkMD5.hash(JSON.stringify(results.resolved));

        callback();
      })
      .catch(callback);
  } else {
    callback();
  }
};

var validateAgainstSchema = function (spec, schemaOrName, data, callback) {
  var validator = _.isString(schemaOrName) ? spec.validators[schemaOrName] : helpers.createJsonValidator();

  helpers.registerCustomFormats(data);

  try {
    validators.validateAgainstSchema(schemaOrName, data, validator);
  } catch (err) {
    if (err.failedValidation) {
      return callback(undefined, err.results);
    } else {
      return callback(err);
    }
  }

  resolveRefs(data, function (err) {
    return callback(err);
  });
};

var validateDefinitions = function (documentMetadata, results) {
  // Validate unused definitions
  _.each(documentMetadata.definitions, function (metadata, id) {
    var defPath = JsonRefs.pathFromPtr(id);
    var defType = defPath[0].substring(0, defPath[0].length - 1);
    var displayId = documentMetadata.swaggerVersion === '1.2' ? defPath[defPath.length - 1] : id;
    var code = defType === 'securityDefinition' ? 'SECURITY_DEFINITION' : defType.toUpperCase();
    var msgPrefix = defType === 'securityDefinition' ?
                             'Security definition' :
                             defType.charAt(0).toUpperCase() + defType.substring(1);

    if (metadata.references.length === 0 && !metadata.inline) {
      // Swagger 1.2 authorization scope
      if (metadata.scopePath) {
        code += '_SCOPE';
        msgPrefix += ' scope';
        defPath = metadata.scopePath;
      }

      createUnusedErrorOrWarning(displayId, code, msgPrefix, defPath, results.warnings);
    }
  });
};

var validateParameters = function (spec, documentMetadata, nPath, parameters, path, results,
                                   skipMissing) {
  var createParameterComboError = function (path) {
    createErrorOrWarning('INVALID_PARAMETER_COMBINATION',
                         'API cannot have a a body parameter and a ' +
                           (spec.version === '1.2' ? 'form' : 'formData') + ' parameter',
                         path, results.errors);
  };
  var pathParams = [];
  var seenBodyParam = false;
  var seenFormParam = false;

  _.reduce(parameters, function (seenParameters, parameter, index) {
    var pPath = path.concat(['parameters', index.toString()]);

    // Unresolved parameter
    if (_.isUndefined(parameter)) {
      return;
    }

    // Identify duplicate parameter names
    validateNoExist(seenParameters, parameter.name, 'PARAMETER', 'Parameter', pPath.concat('name'),
                    results.errors);

    // Keep track of body and path parameters
    if (parameter.paramType === 'body' || parameter.in === 'body') {
      if (seenBodyParam === true) {
        createErrorOrWarning('DUPLICATE_API_BODY_PARAMETER', 'API has more than one body parameter', pPath,
                             results.errors);
      } else if (seenFormParam === true) {
        createParameterComboError(pPath);
      }

      seenBodyParam = true;
    } else if (parameter.paramType === 'form' || parameter.in === 'formData') {
      if (seenBodyParam === true) {
        createParameterComboError(pPath);
      }

      seenFormParam = true;
    } else if (parameter.paramType === 'path' || parameter.in === 'path') {
      if (nPath.args.indexOf(parameter.name) === -1) {
        createErrorOrWarning('UNRESOLVABLE_API_PATH_PARAMETER',
                             'API path parameter could not be resolved: ' + parameter.name, pPath.concat('name'),
                             results.errors);
      }

      pathParams.push(parameter.name);
    }

    if (spec.primitives.indexOf(parameter.type) === -1 && spec.version === '1.2') {
      addReference(documentMetadata, '#/models/' + parameter.type, pPath.concat('type'), results);
    }

    // Validate parameter constraints
    validateSchemaConstraints(documentMetadata, parameter, pPath, results, parameter.skipErrors);

    return seenParameters.concat(parameter.name);
  }, []);

  // Validate missing path parameters (in path but not in operation.parameters)
  if (_.isUndefined(skipMissing) || skipMissing === false) {
    _.each(_.difference(nPath.args, pathParams), function (unused) {
      createErrorOrWarning('MISSING_API_PATH_PARAMETER', 'API requires path parameter but it is not defined: ' + unused,
                           documentMetadata.swaggerVersion === '1.2' ? path.slice(0, 2).concat('path') : path,
                           results.errors);
    });
  }
};

var validateSwagger1_2 = function (spec, resourceListing, apiDeclarations, callback) { // jshint ignore:line
  var adResourcePaths = [];
  var rlDocumentMetadata = getDocumentCache(resourceListing);
  var rlResourcePaths = [];
  var results = {
    errors: [],
    warnings: [],
    apiDeclarations: []
  };

  // Process Resource Listing resource definitions
  rlResourcePaths = _.reduce(resourceListing.apis, function (seenPaths, api, index) {
    // Identify duplicate resource paths defined in the Resource Listing
    validateNoExist(seenPaths, api.path, 'RESOURCE_PATH', 'Resource path', ['apis', index.toString(), 'path'],
                    results.errors);

    seenPaths.push(api.path);

    return seenPaths;
  }, []);

  // Process Resource Listing definitions (authorizations)
  processDocument(rlDocumentMetadata, results);


  // Process each API Declaration
  adResourcePaths = _.reduce(apiDeclarations, function (seenResourcePaths, apiDeclaration, index) {
    var aResults = results.apiDeclarations[index] = {
      errors: [],
      warnings: []
    };
    var adDocumentMetadata = getDocumentCache(apiDeclaration);

    // Identify duplicate resource paths defined in the API Declarations
    validateNoExist(seenResourcePaths, apiDeclaration.resourcePath, 'RESOURCE_PATH', 'Resource path',
                    ['resourcePath'], aResults.errors);

    if (adResourcePaths.indexOf(apiDeclaration.resourcePath) === -1) {
      // Identify unused resource paths defined in the API Declarations
      validateExist(rlResourcePaths, apiDeclaration.resourcePath, 'RESOURCE_PATH', 'Resource path',
                    ['resourcePath'], aResults.errors);

      seenResourcePaths.push(apiDeclaration.resourcePath);
    }

    // TODO: Process authorization references
    // Not possible due to https://github.com/swagger-api/swagger-spec/issues/159

    // Process models
    processDocument(adDocumentMetadata, aResults);

    // Process the API definitions
    _.reduce(apiDeclaration.apis, function (seenPaths, api, index) {
      var aPath = ['apis', index.toString()];
      var nPath = normalizePath(api.path);

      // Validate duplicate resource path
      if (seenPaths.indexOf(nPath.path) > -1) {
        createErrorOrWarning('DUPLICATE_API_PATH', 'API path (or equivalent) already defined: ' + api.path,
                             aPath.concat('path'), aResults.errors);
      } else {
        seenPaths.push(nPath.path);
      }

      // Process the API operations
      _.reduce(api.operations, function (seenMethods, operation, index) {
        var oPath = aPath.concat(['operations', index.toString()]);

        // Validate duplicate operation method
        validateNoExist(seenMethods, operation.method, 'OPERATION_METHOD', 'Operation method', oPath.concat('method'),
                        aResults.errors);

        // Keep track of the seen methods
        seenMethods.push(operation.method);

        // Keep track of operation types
        if (spec.primitives.indexOf(operation.type) === -1 && spec.version === '1.2') {
          addReference(adDocumentMetadata, '#/models/' + operation.type, oPath.concat('type'), aResults);
        }

        // Process authorization references
        processAuthRefs(rlDocumentMetadata, operation.authorizations, oPath.concat('authorizations'), aResults);

        // Validate validate inline constraints
        validateSchemaConstraints(adDocumentMetadata, operation, oPath, aResults);

        // Validate parameters
        validateParameters(spec, adDocumentMetadata, nPath, operation.parameters, oPath, aResults);

        // Validate unique response code
        _.reduce(operation.responseMessages, function (seenResponseCodes, responseMessage, index) {
          var rmPath = oPath.concat(['responseMessages', index.toString()]);

          validateNoExist(seenResponseCodes, responseMessage.code, 'RESPONSE_MESSAGE_CODE', 'Response message code',
                          rmPath.concat(['code']), aResults.errors);

          // Validate missing model
          if (responseMessage.responseModel) {
            addReference(adDocumentMetadata, '#/models/' + responseMessage.responseModel,
                         rmPath.concat('responseModel'), aResults);
          }

          return seenResponseCodes.concat(responseMessage.code);
        }, []);

        return seenMethods;
      }, []);

      return seenPaths;
    }, []);

    // Validate API Declaration definitions
    validateDefinitions(adDocumentMetadata, aResults);

    return seenResourcePaths;
  }, []);

  // Validate API Declaration definitions
  validateDefinitions(rlDocumentMetadata, results);

  // Identify unused resource paths defined in the Resource Listing
  _.each(_.difference(rlResourcePaths, adResourcePaths), function (unused) {
    var index = rlResourcePaths.indexOf(unused);

    createUnusedErrorOrWarning(resourceListing.apis[index].path, 'RESOURCE_PATH', 'Resource path',
                               ['apis', index.toString(), 'path'], results.errors);
  });

  callback(undefined, results);
};

var validateSwagger2_0 = function (spec, swaggerObject, callback) { // jshint ignore:line
  var documentMetadata = getDocumentCache(swaggerObject);
  var results = {
    errors: [],
    warnings: []
  };

  // Process definitions
  processDocument(documentMetadata, results);

  // Process security references
  processAuthRefs(documentMetadata, swaggerObject.security, ['security'], results);

  _.reduce(documentMetadata.resolved.paths, function (seenPaths, path, name) {
    var pPath = ['paths', name];
    var nPath = normalizePath(name);

    // Validate duplicate resource path
    if (seenPaths.indexOf(nPath.path) > -1) {
      createErrorOrWarning('DUPLICATE_API_PATH', 'API path (or equivalent) already defined: ' + name, pPath,
                           results.errors);
    }

    // Validate parameters
    validateParameters(spec, documentMetadata, nPath, path.parameters, pPath, results, true);

    // Validate the Operations
    _.each(path, function (operation, method) {
      var cParams = [];
      var oPath = pPath.concat(method);
      var seenParams = [];

      if (validOptionNames.indexOf(method) === -1) {
        return;
      }

      // Process security references
      processAuthRefs(documentMetadata, operation.security, oPath.concat('security'), results);

      // Compose parameters from path global parameters and operation parameters
      _.each(operation.parameters, function (parameter) {
        // Can happen with invalid references
        if (_.isUndefined(parameter)) {
          return;
        }

        cParams.push(parameter);

        seenParams.push(parameter.name + ':' + parameter.in);
      });

      _.each(path.parameters, function (parameter) {
        var cloned = _.cloneDeep(parameter);

        // The only errors that can occur here are schema constraint validation errors which are already reported above
        // so do not report them again.
        cloned.skipErrors = true;

        if (seenParams.indexOf(parameter.name + ':' + parameter.in) === -1) {
          cParams.push(cloned);
        }
      });

      // Validate parameters
      validateParameters(spec, documentMetadata, nPath, cParams, oPath, results);

      // Validate responses
      _.each(operation.responses, function (response, responseCode) {
        // Do not process references to missing responses
        if (!_.isUndefined(response)) {
          // Validate validate inline constraints
          validateSchemaConstraints(documentMetadata, response, oPath.concat('responses', responseCode), results);
        }
      });
    });

    return seenPaths.concat(nPath.path);
  }, []);

  // Validate definitions
  validateDefinitions(documentMetadata, results);

  callback(undefined, results);
};

var validateSemantically = function (spec, rlOrSO, apiDeclarations, callback) {
  var cbWrapper = function (err, results) {
    callback(err, helpers.formatResults(results));
  };
  if (spec.version === '1.2') {
    validateSwagger1_2(spec, rlOrSO, apiDeclarations, cbWrapper); // jshint ignore:line
  } else {
    validateSwagger2_0(spec, rlOrSO, cbWrapper); // jshint ignore:line
  }
};

var validateStructurally = function (spec, rlOrSO, apiDeclarations, callback) {
  validateAgainstSchema(spec, spec.version === '1.2' ? 'resourceListing.json' : 'schema.json', rlOrSO,
                        function (err, results) {
                          if (err) {
                            return callback(err);
                          }

                          // Only validate the API Declarations if the API is 1.2 and the Resource Listing was valid
                          if (!results && spec.version === '1.2') {
                            results = {
                              errors: [],
                              warnings: [],
                              apiDeclarations: []
                            };

                            async.map(apiDeclarations, function (apiDeclaration, callback2) {
                              validateAgainstSchema(spec, 'apiDeclaration.json', apiDeclaration, callback2);
                            }, function (err, allResults) {
                              if (err) {
                                return callback(err);
                              }

                              _.each(allResults, function (result, index) {
                                results.apiDeclarations[index] = result;
                              });

                              callback(undefined, results);
                            });
                          } else {
                            callback(undefined, results);
                          }
                        });
};

/**
 * Creates a new Swagger specification object.
 *
 * @param {string} version - The Swagger version
 *
 * @constructor
 */
var Specification = function (version) {
  var that = this;
  var createValidators = function (spec, validatorsMap) {
    return _.reduce(validatorsMap, function (result, schemas, schemaName) {
      result[schemaName] = helpers.createJsonValidator(schemas);

      return result;
    }, {});
  };
  var fixSchemaId = function (schemaName) {
    // Swagger 1.2 schema files use one id but use a different id when referencing schema files.  We also use the schema
    // file name to reference the schema in ZSchema.  To fix this so that the JSON Schema validator works properly, we
    // need to set the id to be the name of the schema file.
    var fixed = _.cloneDeep(that.schemas[schemaName]);

    fixed.id = schemaName;

    return fixed;
  };
  var primitives = ['string', 'number', 'boolean', 'integer', 'array'];

  switch (version) {
  case '1.2':
    this.docsUrl = 'https://github.com/swagger-api/swagger-spec/blob/master/versions/1.2.md';
    this.primitives = _.union(primitives, ['void', 'File']);
    this.schemasUrl = 'https://github.com/swagger-api/swagger-spec/tree/master/schemas/v1.2';

    // Here explicitly to allow browserify to work
    this.schemas = {
      'apiDeclaration.json': require('../schemas/1.2/apiDeclaration.json'),
      'authorizationObject.json': require('../schemas/1.2/authorizationObject.json'),
      'dataType.json': require('../schemas/1.2/dataType.json'),
      'dataTypeBase.json': require('../schemas/1.2/dataTypeBase.json'),
      'infoObject.json': require('../schemas/1.2/infoObject.json'),
      'modelsObject.json': require('../schemas/1.2/modelsObject.json'),
      'oauth2GrantType.json': require('../schemas/1.2/oauth2GrantType.json'),
      'operationObject.json': require('../schemas/1.2/operationObject.json'),
      'parameterObject.json': require('../schemas/1.2/parameterObject.json'),
      'resourceListing.json': require('../schemas/1.2/resourceListing.json'),
      'resourceObject.json': require('../schemas/1.2/resourceObject.json')
    };

    this.validators = createValidators(this, {
      'apiDeclaration.json': _.map([
        'dataTypeBase.json',
        'modelsObject.json',
        'oauth2GrantType.json',
        'authorizationObject.json',
        'parameterObject.json',
        'operationObject.json',
        'apiDeclaration.json'
      ], fixSchemaId),
      'resourceListing.json': _.map([
        'resourceObject.json',
        'infoObject.json',
        'oauth2GrantType.json',
        'authorizationObject.json',
        'resourceListing.json'
      ], fixSchemaId)
    });

    break;

  case '2.0':
    this.docsUrl = 'https://github.com/swagger-api/swagger-spec/blob/master/versions/2.0.md';
    this.primitives = _.union(primitives, ['file']);
    this.schemasUrl = 'https://github.com/swagger-api/swagger-spec/tree/master/schemas/v2.0';

    // Here explicitly to allow browserify to work
    this.schemas = {
      'schema.json': require('../schemas/2.0/schema.json')
    };

    this.validators = createValidators(this, {
      'schema.json': [fixSchemaId('schema.json')]
    });

    break;

  default:
    throw new Error(version + ' is an unsupported Swagger specification version');
  }

  this.version = version;
};

/**
 * Returns the result of the validation of the Swagger document(s).
 *
 * @param {object} rlOrSO - The Swagger Resource Listing (1.2) or Swagger Object (2.0)
 * @param {object[]} [apiDeclarations] - The array of Swagger API Declarations (1.2)
 * @param {resultCallback} callback - The result callback
 *
 * @returns undefined if validation passes or an object containing errors and/or warnings
 * @throws Error if the arguments provided are not valid
 */
Specification.prototype.validate = function (rlOrSO, apiDeclarations, callback) {
  // Validate arguments
  switch (this.version) {
  case '1.2':
    // Validate arguments
    if (_.isUndefined(rlOrSO)) {
      throw new Error('resourceListing is required');
    } else if (!_.isPlainObject(rlOrSO)) {
      throw new TypeError('resourceListing must be an object');
    }

    if (_.isUndefined(apiDeclarations)) {
      throw new Error('apiDeclarations is required');
    } else if (!_.isArray(apiDeclarations)) {
      throw new TypeError('apiDeclarations must be an array');
    }

    break;

  case '2.0':
    // Validate arguments
    if (_.isUndefined(rlOrSO)) {
      throw new Error('swaggerObject is required');
    } else if (!_.isPlainObject(rlOrSO)) {
      throw new TypeError('swaggerObject must be an object');
    }

    break;
  }

  if (this.version === '2.0') {
    callback = arguments[1];
  }

  if (_.isUndefined(callback)) {
    throw new Error('callback is required');
  } else if (!_.isFunction(callback)) {
    throw new TypeError('callback must be a function');
  }

  // For Swagger 2.0, make sure apiDeclarations is an empty array
  if (this.version === '2.0') {
    apiDeclarations = [];
  }

  var that = this;

  // Perform the validation
  validateStructurally(this, rlOrSO, apiDeclarations, function (err, result) {
    if (err || helpers.formatResults(result)) {
      callback(err, result);
    } else {
      validateSemantically(that, rlOrSO, apiDeclarations, callback);
    }
  });
};

/**
 * Returns a JSON Schema representation of a composed model based on its id or reference.
 *
 * Note: For Swagger 1.2, we only perform structural validation prior to composing the model.
 *
 * @param {object} apiDOrSO - The Swagger Resource API Declaration (1.2) or the Swagger Object (2.0)
 * @param {string} modelIdOrRef - The model id (1.2) or the reference to the model (1.2 or 2.0)
 * @param {resultCallback} callback - The result callback
 *
 * @returns the object representing a composed object
 *
 * @throws Error if there are validation errors while creating
 */
Specification.prototype.composeModel = function (apiDOrSO, modelIdOrRef, callback) {
  var swaggerVersion = helpers.getSwaggerVersion(apiDOrSO);
  var doComposition = function (err, results) {
    var documentMetadata;

    if (err) {
      return callback(err);
    } else if (helpers.getErrorCount(results) > 0) {
      return handleValidationError(results, callback);
    }

    documentMetadata = getDocumentCache(apiDOrSO);
    results = {
      errors: [],
      warnings: []
    };

    processDocument(documentMetadata, results);

    if (!documentMetadata.definitions[modelIdOrRef]) {
      return callback();
    }

    if (helpers.getErrorCount(results) > 0) {
      return handleValidationError(results, callback);
    }

    callback(undefined, getOrComposeSchema(documentMetadata, modelIdOrRef));
  };

  switch (this.version) {
  case '1.2':
    // Validate arguments
    if (_.isUndefined(apiDOrSO)) {
      throw new Error('apiDeclaration is required');
    } else if (!_.isPlainObject(apiDOrSO)) {
      throw new TypeError('apiDeclaration must be an object');
    }

    if (_.isUndefined(modelIdOrRef)) {
      throw new Error('modelId is required');
    }

    break;

  case '2.0':
    // Validate arguments
    if (_.isUndefined(apiDOrSO)) {
      throw new Error('swaggerObject is required');
    } else if (!_.isPlainObject(apiDOrSO)) {
      throw new TypeError('swaggerObject must be an object');
    }

    if (_.isUndefined(modelIdOrRef)) {
      throw new Error('modelRef is required');
    }

    break;
  }

  if (_.isUndefined(callback)) {
    throw new Error('callback is required');
  } else if (!_.isFunction(callback)) {
    throw new TypeError('callback must be a function');
  }

  if (modelIdOrRef.charAt(0) !== '#') {
    if (this.version === '1.2') {
      modelIdOrRef = '#/models/' + modelIdOrRef;
    } else {
      throw new Error('modelRef must be a JSON Pointer');
    }
  }

  // Ensure the document is valid first
  if (swaggerVersion === '1.2') {
    validateAgainstSchema(this, 'apiDeclaration.json', apiDOrSO, doComposition);
  } else {
    this.validate(apiDOrSO, doComposition);
  }
};

/**
 * Validates a model based on its id.
 *
 * Note: For Swagger 1.2, we only perform structural validation prior to composing the model.
 *
 * @param {object} apiDOrSO - The Swagger Resource API Declaration (1.2) or the Swagger Object (2.0)
 * @param {string} modelIdOrRef - The model id (1.2) or the reference to the model (1.2 or 2.0)
 * @param {*} data - The model to validate
 * @param {resultCallback} callback - The result callback
 *
 * @returns undefined if validation passes or an object containing errors and/or warnings
 *
 * @throws Error if there are validation errors while creating
 */
Specification.prototype.validateModel = function (apiDOrSO, modelIdOrRef, data, callback) {
  switch (this.version) {
  case '1.2':
    // Validate arguments
    if (_.isUndefined(apiDOrSO)) {
      throw new Error('apiDeclaration is required');
    } else if (!_.isPlainObject(apiDOrSO)) {
      throw new TypeError('apiDeclaration must be an object');
    }

    if (_.isUndefined(modelIdOrRef)) {
      throw new Error('modelId is required');
    }

    break;

  case '2.0':
    // Validate arguments
    if (_.isUndefined(apiDOrSO)) {
      throw new Error('swaggerObject is required');
    } else if (!_.isPlainObject(apiDOrSO)) {
      throw new TypeError('swaggerObject must be an object');
    }

    if (_.isUndefined(modelIdOrRef)) {
      throw new Error('modelRef is required');
    }

    break;
  }

  if (_.isUndefined(data)) {
    throw new Error('data is required');
  }

  if (_.isUndefined(callback)) {
    throw new Error('callback is required');
  } else if (!_.isFunction(callback)) {
    throw new TypeError('callback must be a function');
  }

  var that = this;

  this.composeModel(apiDOrSO, modelIdOrRef, function (err, result) {
    if (err) {
      return callback(err);
    }

    validateAgainstSchema(that, result, data, callback);
  });
};

/**
 * Returns a fully resolved document or document fragment.  (Does not perform validation as this is typically called
 * after validation occurs.))
 *
 * @param {object} document - The document to resolve or the document containing the reference to resolve
 * @param {string} [ptr] - The JSON Pointer or undefined to return the whole document
 * @param {resultCallback} callback - The result callback
 *
 * @returns the fully resolved document or fragment
 *
 * @throws Error if there are upstream errors
 */
Specification.prototype.resolve = function (document, ptr, callback) {
  var documentMetadata;
  var respond = function (document) {
    if (_.isString(ptr)) {
      return callback(undefined, traverse(document).get(JsonRefs.pathFromPtr(ptr)));
    } else {
      return callback(undefined, document);
    }
  };

  // Validate arguments
  if (_.isUndefined(document)) {
    throw new Error('document is required');
  } else if (!_.isPlainObject(document)) {
    throw new TypeError('document must be an object');
  }

  if (arguments.length === 2) {
    callback = arguments[1];
    ptr = undefined;
  }

  if (!_.isUndefined(ptr) && !_.isString(ptr)) {
    throw new TypeError('ptr must be a JSON Pointer string');
  }

  if (_.isUndefined(callback)) {
    throw new Error('callback is required');
  } else if (!_.isFunction(callback)) {
    throw new TypeError('callback must be a function');
  }

  documentMetadata = getDocumentCache(document);

  // Swagger 1.2 is not supported due to invalid JSON References being used.  Even if the JSON References were valid,
  // the JSON Schema for Swagger 1.2 do not allow JavaScript objects in all places where the resoution would occur.
  if (documentMetadata.swaggerVersion === '1.2') {
    throw new Error('Swagger 1.2 is not supported');
  }

  if (!documentMetadata.resolved) {
    // Ensure the document is valid first
    this.validate(document, function (err, results) {
      if (err) {
        return callback(err);
      } else if (helpers.getErrorCount(results) > 0) {
        return handleValidationError(results, callback);
      }

      return respond(documentMetadata.resolved);
    });
  } else {
    return respond(documentMetadata.resolved);
  }
};

/**
 * Converts the Swagger 1.2 documents to a Swagger 2.0 document.
 *
 * @param {object} resourceListing - The Swagger Resource Listing
 * @param {object[]} [apiDeclarations] - The array of Swagger API Declarations
 * @param {boolean=false} [skipValidation] - Whether or not to skip validation
 * @param {resultCallback} callback - The result callback
 *
 * @returns the converted Swagger document
 *
 * @throws Error if the arguments provided are not valid
 */
Specification.prototype.convert = function (resourceListing, apiDeclarations, skipValidation, callback) {
  var doConvert = function (resourceListing, apiDeclarations) {
    callback(undefined, swaggerConverter(resourceListing, apiDeclarations));
  };

  if (this.version !== '1.2') {
    throw new Error('Specification#convert only works for Swagger 1.2');
  }

  // Validate arguments
  if (_.isUndefined(resourceListing)) {
    throw new Error('resourceListing is required');
  } else if (!_.isPlainObject(resourceListing)) {
    throw new TypeError('resourceListing must be an object');
  }

  // API Declarations are optional because swagger-converter was written to support it
  if (_.isUndefined(apiDeclarations)) {
    apiDeclarations = [];
  }

  if (!_.isArray(apiDeclarations)) {
    throw new TypeError('apiDeclarations must be an array');
  }

  if (arguments.length < 4) {
    callback = arguments[arguments.length - 1];
  }

  if (_.isUndefined(callback)) {
    throw new Error('callback is required');
  } else if (!_.isFunction(callback)) {
    throw new TypeError('callback must be a function');
  }

  if (skipValidation === true) {
    doConvert(resourceListing, apiDeclarations);
  } else {
    this.validate(resourceListing, apiDeclarations, function (err, results) {
      if (err) {
        return callback(err);
      } else if (helpers.getErrorCount(results) > 0) {
        return handleValidationError(results, callback);
      }

      doConvert(resourceListing, apiDeclarations);
    });
  }
};

module.exports.v1 = module.exports.v1_2 = new Specification('1.2'); // jshint ignore:line
module.exports.v2 = module.exports.v2_0 = new Specification('2.0'); // jshint ignore:line

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{"../schemas/1.2/apiDeclaration.json":193,"../schemas/1.2/authorizationObject.json":194,"../schemas/1.2/dataType.json":195,"../schemas/1.2/dataTypeBase.json":196,"../schemas/1.2/infoObject.json":197,"../schemas/1.2/modelsObject.json":198,"../schemas/1.2/oauth2GrantType.json":199,"../schemas/1.2/operationObject.json":200,"../schemas/1.2/parameterObject.json":201,"../schemas/1.2/resourceListing.json":202,"../schemas/1.2/resourceObject.json":203,"../schemas/2.0/schema.json":204,"./helpers":1,"./validators":3,"async":4,"js-yaml":27,"json-refs":57,"lodash":87,"spark-md5":98,"swagger-converter":105,"traverse":106}],3:[function(require,module,exports){
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Apigee Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

'use strict';

var _ = require('lodash');
var helpers = require('./helpers');

// http://tools.ietf.org/html/rfc3339#section-5.6
var dateRegExp = /^([0-9]{4})-([0-9]{2})-([0-9]{2})$/;
// http://tools.ietf.org/html/rfc3339#section-5.6
var dateTimeRegExp = /^([0-9]{2}):([0-9]{2}):([0-9]{2})(.[0-9]+)?(z|([+-][0-9]{2}):([0-9]{2}))$/;
var isValidDate = module.exports.isValidDate = function (date) {
  var day;
  var matches;
  var month;

  if (_.isDate(date)) {
    return true;
  }

  if (!_.isString(date)) {
    date = date.toString();
  }

  matches = dateRegExp.exec(date);

  if (matches === null) {
    return false;
  }

  day = matches[3];
  month = matches[2];

  if (month < '01' || month > '12' || day < '01' || day > '31') {
    return false;
  }

  return true;
};
var isValidDateTime = module.exports.isValidDateTime = function (dateTime) {
  var hour;
  var date;
  var time;
  var matches;
  var minute;
  var parts;
  var second;
  var timezoneHours;
  var timezoneMinutes;

  if (_.isDate(dateTime)) {
    return true;
  }

  if (!_.isString(dateTime)) {
    dateTime = dateTime.toString();
  }

  parts = dateTime.toLowerCase().split('t');
  date = parts[0];
  time = parts.length > 1 ? parts[1] : undefined;

  if (!isValidDate(date)) {
    return false;
  }

  matches = dateTimeRegExp.exec(time);

  if (matches === null) {
    return false;
  }

  hour = matches[1];
  minute = matches[2];
  second = matches[3];
  if (matches[5] === 'z') {
    timezoneHours = 0;
    timezoneMinutes = 0;
  } else {
    timezoneHours = Number(matches[6]);
    timezoneMinutes = Number(matches[7]);
  }

  var validTimezoneMinutes = timezoneMinutes === 0 || timezoneMinutes === 15 || timezoneMinutes === 30 || timezoneMinutes === 45;

  if (hour > '23' || minute > '59' || second > '59' || timezoneHours > 14 || timezoneHours < -12 || !validTimezoneMinutes) {
    return false;
  }

  return true;
};

var throwErrorWithCode = function (code, msg) {
  var err = new Error(msg);

  err.code = code;
  err.failedValidation = true;

  throw err;
};

module.exports.validateAgainstSchema = function (schemaOrName, data, validator) {
  var sanitizeError = function (obj) {
    // Make anyOf/oneOf errors more human readable (Issue 200)
    var defType = ['additionalProperties', 'items'].indexOf(obj.path[obj.path.length - 1]) > -1 ?
          'schema' :
          obj.path[obj.path.length - 2];

    if (['ANY_OF_MISSING', 'ONE_OF_MISSING'].indexOf(obj.code) > -1) {
      switch (defType) {
      case 'parameters':
        defType = 'parameter';
        break;

      case 'responses':
        defType = 'response';
        break;

      case 'schema':
        defType += ' ' + obj.path[obj.path.length - 1];

        // no default
      }

      obj.message = 'Not a valid ' + defType + ' definition';
    }

    // Remove the params portion of the error
    delete obj.params;
    delete obj.schemaId;

    if (obj.inner) {
      _.each(obj.inner, function (nObj) {
        sanitizeError(nObj);
      });
    }
  };
  var schema = _.isPlainObject(schemaOrName) ? _.cloneDeep(schemaOrName) : schemaOrName;

  // We don't check this due to internal usage but if validator is not provided, schemaOrName must be a schema
  if (_.isUndefined(validator)) {
    validator = helpers.createJsonValidator([schema]);
  }

  var valid = validator.validate(data, schema);

  if (!valid) {
    try {
      throwErrorWithCode('SCHEMA_VALIDATION_FAILED', 'Failed schema validation');
    } catch (err) {
      err.results = {
        errors: _.map(validator.getLastErrors(), function (err) {
          sanitizeError(err);

          return err;
        }),
        warnings: []
      };

      throw err;
    }
  }
};


/**
 * Validates a schema of type array is properly formed (when necessar).
 *
 * *param {object} schema - The schema object to validate
 *
 * @throws Error if the schema says it's an array but it is not formed properly
 *
 * @see {@link https://github.com/swagger-api/swagger-spec/issues/174}
 */
var validateArrayType = module.exports.validateArrayType = function (schema) {
  // We have to do this manually for now
  if (schema.type === 'array' && _.isUndefined(schema.items)) {
    throwErrorWithCode('OBJECT_MISSING_REQUIRED_PROPERTY', 'Missing required property: items');
  }
};

/**
 * Validates the request or response content type (when necessary).
 *
 * @param {string[]} gPOrC - The valid consumes at the API scope
 * @param {string[]} oPOrC - The valid consumes at the operation scope
 * @param {object} reqOrRes - The request or response
 *
 * @throws Error if the content type is invalid
 */
module.exports.validateContentType = function (gPOrC, oPOrC, reqOrRes) {
  // http://www.w3.org/Protocols/rfc2616/rfc2616-sec7.html#sec7.2.1
  var isResponse = typeof reqOrRes.end === 'function';
  var contentType = isResponse ? reqOrRes.getHeader('content-type') : reqOrRes.headers['content-type'];
  var pOrC = _.map(_.union(gPOrC, oPOrC), function (contentType) {
    return contentType.split(';')[0];
  });

  if (!contentType) {
    if (isResponse) {
      contentType = 'text/plain';
    } else {
      contentType = 'application/octet-stream';
    }
  }

  contentType = contentType.split(';')[0];

  if (pOrC.length > 0 && (isResponse ?
                          true :
                          ['POST', 'PUT'].indexOf(reqOrRes.method) !== -1) && pOrC.indexOf(contentType) === -1) {
    throw new Error('Invalid content type (' + contentType + ').  These are valid: ' + pOrC.join(', '));
  }
};

/**
 * Validates the value against the allowable values (when necessary).
 *
 * @param {*} val - The parameter value
 * @param {string[]} allowed - The allowable values
 *
 * @throws Error if the value is not allowable
 */
var validateEnum = module.exports.validateEnum = function (val, allowed) {
  if (!_.isUndefined(allowed) && !_.isUndefined(val) && allowed.indexOf(val) === -1) {
    throwErrorWithCode('ENUM_MISMATCH', 'Not an allowable value (' + allowed.join(', ') + '): ' + val);
  }
};

/**
 * Validates the value is less than the maximum (when necessary).
 *
 * @param {*} val - The parameter value
 * @param {string} maximum - The maximum value
 * @param {boolean} [exclusive=false] - Whether or not the value includes the maximum in its comparison
 *
 * @throws Error if the value is greater than the maximum
 */
var validateMaximum = module.exports.validateMaximum = function (val, maximum, type, exclusive) {
  var code = exclusive === true ? 'MAXIMUM_EXCLUSIVE' : 'MAXIMUM';
  var testMax;
  var testVal;

  if (_.isUndefined(exclusive)) {
    exclusive = false;
  }

  if (type === 'integer') {
    testVal = parseInt(val, 10);
  } else if (type === 'number') {
    testVal = parseFloat(val);
  }

  if (!_.isUndefined(maximum)) {
    testMax = parseFloat(maximum);

    if (exclusive && testVal >= testMax) {
      throwErrorWithCode(code, 'Greater than or equal to the configured maximum (' + maximum + '): ' + val);
    } else if (testVal > testMax) {
      throwErrorWithCode(code, 'Greater than the configured maximum (' + maximum + '): ' + val);
    }
  }
};

/**
 * Validates the array count is less than the maximum (when necessary).
 *
 * @param {*[]} val - The parameter value
 * @param {number} maxItems - The maximum number of items
 *
 * @throws Error if the value contains more items than allowable
 */
var validateMaxItems = module.exports.validateMaxItems = function (val, maxItems) {
  if (!_.isUndefined(maxItems) && val.length > maxItems) {
    throwErrorWithCode('ARRAY_LENGTH_LONG', 'Array is too long (' + val.length + '), maximum ' + maxItems);
  }
};

/**
 * Validates the value length is less than the maximum (when necessary).
 *
 * @param {*[]} val - The parameter value
 * @param {number} maxLength - The maximum length
 *
 * @throws Error if the value's length is greater than the maximum
 */
var validateMaxLength = module.exports.validateMaxLength = function (val, maxLength) {
  if (!_.isUndefined(maxLength) && val.length > maxLength) {
    throwErrorWithCode('MAX_LENGTH', 'String is too long (' + val.length + ' chars), maximum ' + maxLength);
  }
};

/**
 * Validates the value's property count is greater than the maximum (when necessary).
 *
 * @param {*[]} val - The parameter value
 * @param {number} minProperties - The maximum number of properties
 *
 * @throws Error if the value's property count is less than the maximum
 */
var validateMaxProperties = module.exports.validateMaxProperties = function (val, maxProperties) {
  var propCount = _.isPlainObject(val) ? Object.keys(val).length : 0;

  if (!_.isUndefined(maxProperties) && propCount > maxProperties) {
    throwErrorWithCode('MAX_PROPERTIES',
                       'Number of properties is too many (' + propCount + ' properties), maximum ' + maxProperties);
  }
};

/**
 * Validates the value array count is greater than the minimum (when necessary).
 *
 * @param {*} val - The parameter value
 * @param {string} minimum - The minimum value
 * @param {boolean} [exclusive=false] - Whether or not the value includes the minimum in its comparison
 *
 * @throws Error if the value is less than the minimum
 */
var validateMinimum = module.exports.validateMinimum = function (val, minimum, type, exclusive) {
  var code = exclusive === true ? 'MINIMUM_EXCLUSIVE' : 'MINIMUM';
  var testMin;
  var testVal;

  if (_.isUndefined(exclusive)) {
    exclusive = false;
  }

  if (type === 'integer') {
    testVal = parseInt(val, 10);
  } else if (type === 'number') {
    testVal = parseFloat(val);
  }

  if (!_.isUndefined(minimum)) {
    testMin = parseFloat(minimum);

    if (exclusive && testVal <= testMin) {
      throwErrorWithCode(code, 'Less than or equal to the configured minimum (' + minimum + '): ' + val);
    } else if (testVal < testMin) {
      throwErrorWithCode(code, 'Less than the configured minimum (' + minimum + '): ' + val);
    }
  }
};

/**
 * Validates the value value contains fewer items than allowed (when necessary).
 *
 * @param {*[]} val - The parameter value
 * @param {number} minItems - The minimum number of items
 *
 * @throws Error if the value contains fewer items than allowable
 */
var validateMinItems = module.exports.validateMinItems = function (val, minItems) {
  if (!_.isUndefined(minItems) && val.length < minItems) {
    throwErrorWithCode('ARRAY_LENGTH_SHORT', 'Array is too short (' + val.length + '), minimum ' + minItems);
  }
};

/**
 * Validates the value length is less than the minimum (when necessary).
 *
 * @param {*[]} val - The parameter value
 * @param {number} minLength - The minimum length
 *
 * @throws Error if the value's length is less than the minimum
 */
var validateMinLength = module.exports.validateMinLength = function (val, minLength) {
  if (!_.isUndefined(minLength) && val.length < minLength) {
    throwErrorWithCode('MIN_LENGTH', 'String is too short (' + val.length + ' chars), minimum ' + minLength);
  }
};

/**
 * Validates the value's property count is less than or equal to the minimum (when necessary).
 *
 * @param {*[]} val - The parameter value
 * @param {number} minProperties - The minimum number of properties
 *
 * @throws Error if the value's property count is less than the minimum
 */
var validateMinProperties = module.exports.validateMinProperties = function (val, minProperties) {
  var propCount = _.isPlainObject(val) ? Object.keys(val).length : 0;

  if (!_.isUndefined(minProperties) && propCount < minProperties) {
    throwErrorWithCode('MIN_PROPERTIES',
                       'Number of properties is too few (' + propCount + ' properties), minimum ' + minProperties);
  }
};

/**
 * Validates the value is a multiple of the provided number (when necessary).
 *
 * @param {*[]} val - The parameter value
 * @param {number} multipleOf - The number that should divide evenly into the value
 *
 * @throws Error if the value contains fewer items than allowable
 */
var validateMultipleOf = module.exports.validateMultipleOf = function (val, multipleOf) {
  if (!_.isUndefined(multipleOf) && val % multipleOf !== 0) {
    throwErrorWithCode('MULTIPLE_OF', 'Not a multiple of ' + multipleOf);
  }
};

/**
 * Validates the value matches a pattern (when necessary).
 *
 * @param {string} name - The parameter name
 * @param {*} val - The parameter value
 * @param {string} pattern - The pattern
 *
 * @throws Error if the value does not match the pattern
 */
var validatePattern = module.exports.validatePattern = function (val, pattern) {
  if (!_.isUndefined(pattern) && _.isNull(val.match(new RegExp(pattern)))) {
    throwErrorWithCode('PATTERN', 'Does not match required pattern: ' + pattern);
  }
};

/**
 * Validates the value requiredness (when necessary).
 *
 * @param {*} val - The parameter value
 * @param {boolean} required - Whether or not the parameter is required
 *
 * @throws Error if the value is required but is not present
 */
module.exports.validateRequiredness = function (val, required) {
  if (!_.isUndefined(required) && required === true && _.isUndefined(val)) {
    throwErrorWithCode('REQUIRED', 'Is required');
  }
};

/**
 * Validates the value type and format (when necessary).
 *
 * @param {string} version - The Swagger version
 * @param {*} val - The parameter value
 * @param {string} type - The parameter type
 * @param {string} format - The parameter format
 * @param {boolean} [skipError=false] - Whether or not to skip throwing an error (Useful for validating arrays)
 *
 * @throws Error if the value is not the proper type or format
 */
var validateTypeAndFormat = module.exports.validateTypeAndFormat =
  function validateTypeAndFormat (version, val, type, format, allowEmptyValue, skipError) {
    var result = true;
    var oVal = val;

    // If there is an empty value and we allow empty values, the value is always valid
    if (allowEmptyValue === true && val === '') {
      return;
    }

    if (_.isArray(val)) {
      _.each(val, function (aVal, index) {
        if (!validateTypeAndFormat(version, aVal, type, format, allowEmptyValue, true)) {
          throwErrorWithCode('INVALID_TYPE', 'Value at index ' + index + ' is not a valid ' + type + ': ' + aVal);
        }
      });
    } else {
      switch (type) {
      case 'boolean':
        // Coerce the value only for Swagger 1.2
        if (version === '1.2' && _.isString(val)) {
          if (val === 'false') {
            val = false;
          } else if (val === 'true') {
            val = true;
          }
        }

        result = _.isBoolean(val);
        break;
      case 'integer':
        // Coerce the value only for Swagger 1.2
        if (version === '1.2' && _.isString(val)) {
          val = Number(val);
        }

        result = _.isFinite(val) && (Math.round(val) === val);
        break;
      case 'number':
        // Coerce the value only for Swagger 1.2
        if (version === '1.2' && _.isString(val)) {
          val = Number(val);
        }

        result = _.isFinite(val);
        break;
      case 'string':
        if (!_.isUndefined(format)) {
          switch (format) {
          case 'date':
            result = isValidDate(val);
            break;
          case 'date-time':
            result = isValidDateTime(val);
            break;
          }
        }
        break;
      case 'void':
        result = _.isUndefined(val);
        break;
      }
    }

    if (skipError) {
      return result;
    } else if (!result) {
      throwErrorWithCode('INVALID_TYPE',
                         type !== 'void' ?
                           'Not a valid ' + (_.isUndefined(format) ? '' : format + ' ') + type + ': ' + oVal :
                           'Void does not allow a value');
    }
  };

/**
 * Validates the value values are unique (when necessary).
 *
 * @param {string[]} val - The parameter value
 * @param {boolean} isUnique - Whether or not the parameter values are unique
 *
 * @throws Error if the value has duplicates
 */
var validateUniqueItems = module.exports.validateUniqueItems = function (val, isUnique) {
  if (!_.isUndefined(isUnique) && _.uniq(val).length !== val.length) {
    throwErrorWithCode('ARRAY_UNIQUE', 'Does not allow duplicate values: ' + val.join(', '));
  }
};

/**
 * Validates the value against the schema.
 *
 * @param {string} version - The Swagger version
 * @param {object} schema - The schema to use to validate things
 * @param {string[]} path - The path to the schema
 * @param {*} [val] - The value to validate or undefined to use the default value provided by the schema
 *
 * @throws Error if any validation failes
 */
var validateSchemaConstraints = module.exports.validateSchemaConstraints = function (version, schema, path, val) {
  var resolveSchema = function (schema) {
    var resolved = schema;

    if (resolved.schema) {
      path = path.concat(['schema']);

      resolved = resolveSchema(resolved.schema);
    }

    return resolved;
  };

  var type = schema.type;
  var allowEmptyValue;

  if (!type) {
    if (!schema.schema) {
      if (path[path.length - 2] === 'responses') {
        type = 'void';
      } else {
        type = 'object';
      }
    } else {
      schema = resolveSchema(schema);
      type = schema.type || 'object';
    }
  }

  allowEmptyValue = schema ? schema.allowEmptyValue === true : false;

  try {
    // Always perform this check even if there is no value
    if (type === 'array') {
      validateArrayType(schema);
    }

    // Default to default value if necessary
    if (_.isUndefined(val)) {
      val = version === '1.2' ? schema.defaultValue : schema.default;

      path = path.concat([version === '1.2' ? 'defaultValue' : 'default']);
    }

    // If there is no explicit default value, return as all validations will fail
    if (_.isUndefined(val)) {
      return;
    }

    if (type === 'array') {
      _.each(val, function (val, index) {
        try {
          validateSchemaConstraints(version, schema.items || {}, path.concat(index.toString()), val);
        } catch (err) {
          err.message = 'Value at index ' + index + ' ' + (err.code === 'INVALID_TYPE' ? 'is ' : '') +
            err.message.charAt(0).toLowerCase() + err.message.substring(1);

          throw err;
        }
      });
    } else {
      validateTypeAndFormat(version, val, type, schema.format, allowEmptyValue);
    }

    // Validate enum
    validateEnum(val, schema.enum);

    // Validate maximum
    validateMaximum(val, schema.maximum, type, schema.exclusiveMaximum);


    // Validate maxItems (Swagger 2.0+)
    validateMaxItems(val, schema.maxItems);

    // Validate maxLength (Swagger 2.0+)
    validateMaxLength(val, schema.maxLength);

    // Validate maxProperties (Swagger 2.0+)
    validateMaxProperties(val, schema.maxProperties);

    // Validate minimum
    validateMinimum(val, schema.minimum, type, schema.exclusiveMinimum);

    // Validate minItems
    validateMinItems(val, schema.minItems);

    // Validate minLength (Swagger 2.0+)
    validateMinLength(val, schema.minLength);

    // Validate minProperties (Swagger 2.0+)
    validateMinProperties(val, schema.minProperties);

    // Validate multipleOf (Swagger 2.0+)
    validateMultipleOf(val, schema.multipleOf);

    // Validate pattern (Swagger 2.0+)
    validatePattern(val, schema.pattern);

    // Validate uniqueItems
    validateUniqueItems(val, schema.uniqueItems);
  } catch (err) {
    err.path = path;

    throw err;
  }
};

},{"./helpers":1,"lodash":87}],4:[function(require,module,exports){
(function (process,global){
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.async = global.async || {})));
}(this, (function (exports) { 'use strict';

function slice(arrayLike, start) {
    start = start|0;
    var newLen = Math.max(arrayLike.length - start, 0);
    var newArr = Array(newLen);
    for(var idx = 0; idx < newLen; idx++)  {
        newArr[idx] = arrayLike[start + idx];
    }
    return newArr;
}

/**
 * Creates a continuation function with some arguments already applied.
 *
 * Useful as a shorthand when combined with other control flow functions. Any
 * arguments passed to the returned function are added to the arguments
 * originally passed to apply.
 *
 * @name apply
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {Function} fn - The function you want to eventually apply all
 * arguments to. Invokes with (arguments...).
 * @param {...*} arguments... - Any number of arguments to automatically apply
 * when the continuation is called.
 * @returns {Function} the partially-applied function
 * @example
 *
 * // using apply
 * async.parallel([
 *     async.apply(fs.writeFile, 'testfile1', 'test1'),
 *     async.apply(fs.writeFile, 'testfile2', 'test2')
 * ]);
 *
 *
 * // the same process without using apply
 * async.parallel([
 *     function(callback) {
 *         fs.writeFile('testfile1', 'test1', callback);
 *     },
 *     function(callback) {
 *         fs.writeFile('testfile2', 'test2', callback);
 *     }
 * ]);
 *
 * // It's possible to pass any number of additional arguments when calling the
 * // continuation:
 *
 * node> var fn = async.apply(sys.puts, 'one');
 * node> fn('two', 'three');
 * one
 * two
 * three
 */
var apply = function(fn/*, ...args*/) {
    var args = slice(arguments, 1);
    return function(/*callArgs*/) {
        var callArgs = slice(arguments);
        return fn.apply(null, args.concat(callArgs));
    };
};

var initialParams = function (fn) {
    return function (/*...args, callback*/) {
        var args = slice(arguments);
        var callback = args.pop();
        fn.call(this, args, callback);
    };
};

/**
 * Checks if `value` is the
 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
 * @example
 *
 * _.isObject({});
 * // => true
 *
 * _.isObject([1, 2, 3]);
 * // => true
 *
 * _.isObject(_.noop);
 * // => true
 *
 * _.isObject(null);
 * // => false
 */
function isObject(value) {
  var type = typeof value;
  return value != null && (type == 'object' || type == 'function');
}

var hasSetImmediate = typeof setImmediate === 'function' && setImmediate;
var hasNextTick = typeof process === 'object' && typeof process.nextTick === 'function';

function fallback(fn) {
    setTimeout(fn, 0);
}

function wrap(defer) {
    return function (fn/*, ...args*/) {
        var args = slice(arguments, 1);
        defer(function () {
            fn.apply(null, args);
        });
    };
}

var _defer;

if (hasSetImmediate) {
    _defer = setImmediate;
} else if (hasNextTick) {
    _defer = process.nextTick;
} else {
    _defer = fallback;
}

var setImmediate$1 = wrap(_defer);

/**
 * Take a sync function and make it async, passing its return value to a
 * callback. This is useful for plugging sync functions into a waterfall,
 * series, or other async functions. Any arguments passed to the generated
 * function will be passed to the wrapped function (except for the final
 * callback argument). Errors thrown will be passed to the callback.
 *
 * If the function passed to `asyncify` returns a Promise, that promises's
 * resolved/rejected state will be used to call the callback, rather than simply
 * the synchronous return value.
 *
 * This also means you can asyncify ES2017 `async` functions.
 *
 * @name asyncify
 * @static
 * @memberOf module:Utils
 * @method
 * @alias wrapSync
 * @category Util
 * @param {Function} func - The synchronous function, or Promise-returning
 * function to convert to an {@link AsyncFunction}.
 * @returns {AsyncFunction} An asynchronous wrapper of the `func`. To be
 * invoked with `(args..., callback)`.
 * @example
 *
 * // passing a regular synchronous function
 * async.waterfall([
 *     async.apply(fs.readFile, filename, "utf8"),
 *     async.asyncify(JSON.parse),
 *     function (data, next) {
 *         // data is the result of parsing the text.
 *         // If there was a parsing error, it would have been caught.
 *     }
 * ], callback);
 *
 * // passing a function returning a promise
 * async.waterfall([
 *     async.apply(fs.readFile, filename, "utf8"),
 *     async.asyncify(function (contents) {
 *         return db.model.create(contents);
 *     }),
 *     function (model, next) {
 *         // `model` is the instantiated model object.
 *         // If there was an error, this function would be skipped.
 *     }
 * ], callback);
 *
 * // es2017 example, though `asyncify` is not needed if your JS environment
 * // supports async functions out of the box
 * var q = async.queue(async.asyncify(async function(file) {
 *     var intermediateStep = await processFile(file);
 *     return await somePromise(intermediateStep)
 * }));
 *
 * q.push(files);
 */
function asyncify(func) {
    return initialParams(function (args, callback) {
        var result;
        try {
            result = func.apply(this, args);
        } catch (e) {
            return callback(e);
        }
        // if result is Promise object
        if (isObject(result) && typeof result.then === 'function') {
            result.then(function(value) {
                invokeCallback(callback, null, value);
            }, function(err) {
                invokeCallback(callback, err.message ? err : new Error(err));
            });
        } else {
            callback(null, result);
        }
    });
}

function invokeCallback(callback, error, value) {
    try {
        callback(error, value);
    } catch (e) {
        setImmediate$1(rethrow, e);
    }
}

function rethrow(error) {
    throw error;
}

var supportsSymbol = typeof Symbol === 'function';

function isAsync(fn) {
    return supportsSymbol && fn[Symbol.toStringTag] === 'AsyncFunction';
}

function wrapAsync(asyncFn) {
    return isAsync(asyncFn) ? asyncify(asyncFn) : asyncFn;
}

function applyEach$1(eachfn) {
    return function(fns/*, ...args*/) {
        var args = slice(arguments, 1);
        var go = initialParams(function(args, callback) {
            var that = this;
            return eachfn(fns, function (fn, cb) {
                wrapAsync(fn).apply(that, args.concat(cb));
            }, callback);
        });
        if (args.length) {
            return go.apply(this, args);
        }
        else {
            return go;
        }
    };
}

/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
var root = freeGlobal || freeSelf || Function('return this')();

/** Built-in value references. */
var Symbol$1 = root.Symbol;

/** Used for built-in method references. */
var objectProto = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString = objectProto.toString;

/** Built-in value references. */
var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;

/**
 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the raw `toStringTag`.
 */
function getRawTag(value) {
  var isOwn = hasOwnProperty.call(value, symToStringTag$1),
      tag = value[symToStringTag$1];

  try {
    value[symToStringTag$1] = undefined;
    var unmasked = true;
  } catch (e) {}

  var result = nativeObjectToString.call(value);
  if (unmasked) {
    if (isOwn) {
      value[symToStringTag$1] = tag;
    } else {
      delete value[symToStringTag$1];
    }
  }
  return result;
}

/** Used for built-in method references. */
var objectProto$1 = Object.prototype;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString$1 = objectProto$1.toString;

/**
 * Converts `value` to a string using `Object.prototype.toString`.
 *
 * @private
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 */
function objectToString(value) {
  return nativeObjectToString$1.call(value);
}

/** `Object#toString` result references. */
var nullTag = '[object Null]';
var undefinedTag = '[object Undefined]';

/** Built-in value references. */
var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;

/**
 * The base implementation of `getTag` without fallbacks for buggy environments.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */
function baseGetTag(value) {
  if (value == null) {
    return value === undefined ? undefinedTag : nullTag;
  }
  return (symToStringTag && symToStringTag in Object(value))
    ? getRawTag(value)
    : objectToString(value);
}

/** `Object#toString` result references. */
var asyncTag = '[object AsyncFunction]';
var funcTag = '[object Function]';
var genTag = '[object GeneratorFunction]';
var proxyTag = '[object Proxy]';

/**
 * Checks if `value` is classified as a `Function` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
 * @example
 *
 * _.isFunction(_);
 * // => true
 *
 * _.isFunction(/abc/);
 * // => false
 */
function isFunction(value) {
  if (!isObject(value)) {
    return false;
  }
  // The use of `Object#toString` avoids issues with the `typeof` operator
  // in Safari 9 which returns 'object' for typed arrays and other constructors.
  var tag = baseGetTag(value);
  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
}

/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991;

/**
 * Checks if `value` is a valid array-like length.
 *
 * **Note:** This method is loosely based on
 * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
 * @example
 *
 * _.isLength(3);
 * // => true
 *
 * _.isLength(Number.MIN_VALUE);
 * // => false
 *
 * _.isLength(Infinity);
 * // => false
 *
 * _.isLength('3');
 * // => false
 */
function isLength(value) {
  return typeof value == 'number' &&
    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
}

/**
 * Checks if `value` is array-like. A value is considered array-like if it's
 * not a function and has a `value.length` that's an integer greater than or
 * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
 * @example
 *
 * _.isArrayLike([1, 2, 3]);
 * // => true
 *
 * _.isArrayLike(document.body.children);
 * // => true
 *
 * _.isArrayLike('abc');
 * // => true
 *
 * _.isArrayLike(_.noop);
 * // => false
 */
function isArrayLike(value) {
  return value != null && isLength(value.length) && !isFunction(value);
}

// A temporary value used to identify if the loop should be broken.
// See #1064, #1293
var breakLoop = {};

/**
 * This method returns `undefined`.
 *
 * @static
 * @memberOf _
 * @since 2.3.0
 * @category Util
 * @example
 *
 * _.times(2, _.noop);
 * // => [undefined, undefined]
 */
function noop() {
  // No operation performed.
}

function once(fn) {
    return function () {
        if (fn === null) return;
        var callFn = fn;
        fn = null;
        callFn.apply(this, arguments);
    };
}

var iteratorSymbol = typeof Symbol === 'function' && Symbol.iterator;

var getIterator = function (coll) {
    return iteratorSymbol && coll[iteratorSymbol] && coll[iteratorSymbol]();
};

/**
 * The base implementation of `_.times` without support for iteratee shorthands
 * or max array length checks.
 *
 * @private
 * @param {number} n The number of times to invoke `iteratee`.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the array of results.
 */
function baseTimes(n, iteratee) {
  var index = -1,
      result = Array(n);

  while (++index < n) {
    result[index] = iteratee(index);
  }
  return result;
}

/**
 * Checks if `value` is object-like. A value is object-like if it's not `null`
 * and has a `typeof` result of "object".
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
 * @example
 *
 * _.isObjectLike({});
 * // => true
 *
 * _.isObjectLike([1, 2, 3]);
 * // => true
 *
 * _.isObjectLike(_.noop);
 * // => false
 *
 * _.isObjectLike(null);
 * // => false
 */
function isObjectLike(value) {
  return value != null && typeof value == 'object';
}

/** `Object#toString` result references. */
var argsTag = '[object Arguments]';

/**
 * The base implementation of `_.isArguments`.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 */
function baseIsArguments(value) {
  return isObjectLike(value) && baseGetTag(value) == argsTag;
}

/** Used for built-in method references. */
var objectProto$3 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$2 = objectProto$3.hasOwnProperty;

/** Built-in value references. */
var propertyIsEnumerable = objectProto$3.propertyIsEnumerable;

/**
 * Checks if `value` is likely an `arguments` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 *  else `false`.
 * @example
 *
 * _.isArguments(function() { return arguments; }());
 * // => true
 *
 * _.isArguments([1, 2, 3]);
 * // => false
 */
var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
  return isObjectLike(value) && hasOwnProperty$2.call(value, 'callee') &&
    !propertyIsEnumerable.call(value, 'callee');
};

/**
 * Checks if `value` is classified as an `Array` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
 * @example
 *
 * _.isArray([1, 2, 3]);
 * // => true
 *
 * _.isArray(document.body.children);
 * // => false
 *
 * _.isArray('abc');
 * // => false
 *
 * _.isArray(_.noop);
 * // => false
 */
var isArray = Array.isArray;

/**
 * This method returns `false`.
 *
 * @static
 * @memberOf _
 * @since 4.13.0
 * @category Util
 * @returns {boolean} Returns `false`.
 * @example
 *
 * _.times(2, _.stubFalse);
 * // => [false, false]
 */
function stubFalse() {
  return false;
}

/** Detect free variable `exports`. */
var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Built-in value references. */
var Buffer = moduleExports ? root.Buffer : undefined;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;

/**
 * Checks if `value` is a buffer.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
 * @example
 *
 * _.isBuffer(new Buffer(2));
 * // => true
 *
 * _.isBuffer(new Uint8Array(2));
 * // => false
 */
var isBuffer = nativeIsBuffer || stubFalse;

/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$1 = 9007199254740991;

/** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/;

/**
 * Checks if `value` is a valid array-like index.
 *
 * @private
 * @param {*} value The value to check.
 * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
 * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
 */
function isIndex(value, length) {
  length = length == null ? MAX_SAFE_INTEGER$1 : length;
  return !!length &&
    (typeof value == 'number' || reIsUint.test(value)) &&
    (value > -1 && value % 1 == 0 && value < length);
}

/** `Object#toString` result references. */
var argsTag$1 = '[object Arguments]';
var arrayTag = '[object Array]';
var boolTag = '[object Boolean]';
var dateTag = '[object Date]';
var errorTag = '[object Error]';
var funcTag$1 = '[object Function]';
var mapTag = '[object Map]';
var numberTag = '[object Number]';
var objectTag = '[object Object]';
var regexpTag = '[object RegExp]';
var setTag = '[object Set]';
var stringTag = '[object String]';
var weakMapTag = '[object WeakMap]';

var arrayBufferTag = '[object ArrayBuffer]';
var dataViewTag = '[object DataView]';
var float32Tag = '[object Float32Array]';
var float64Tag = '[object Float64Array]';
var int8Tag = '[object Int8Array]';
var int16Tag = '[object Int16Array]';
var int32Tag = '[object Int32Array]';
var uint8Tag = '[object Uint8Array]';
var uint8ClampedTag = '[object Uint8ClampedArray]';
var uint16Tag = '[object Uint16Array]';
var uint32Tag = '[object Uint32Array]';

/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
typedArrayTags[uint32Tag] = true;
typedArrayTags[argsTag$1] = typedArrayTags[arrayTag] =
typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
typedArrayTags[errorTag] = typedArrayTags[funcTag$1] =
typedArrayTags[mapTag] = typedArrayTags[numberTag] =
typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
typedArrayTags[setTag] = typedArrayTags[stringTag] =
typedArrayTags[weakMapTag] = false;

/**
 * The base implementation of `_.isTypedArray` without Node.js optimizations.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 */
function baseIsTypedArray(value) {
  return isObjectLike(value) &&
    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
}

/**
 * The base implementation of `_.unary` without support for storing metadata.
 *
 * @private
 * @param {Function} func The function to cap arguments for.
 * @returns {Function} Returns the new capped function.
 */
function baseUnary(func) {
  return function(value) {
    return func(value);
  };
}

/** Detect free variable `exports`. */
var freeExports$1 = typeof exports == 'object' && exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule$1 = freeExports$1 && typeof module == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports$1 = freeModule$1 && freeModule$1.exports === freeExports$1;

/** Detect free variable `process` from Node.js. */
var freeProcess = moduleExports$1 && freeGlobal.process;

/** Used to access faster Node.js helpers. */
var nodeUtil = (function() {
  try {
    return freeProcess && freeProcess.binding && freeProcess.binding('util');
  } catch (e) {}
}());

/* Node.js helper references. */
var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;

/**
 * Checks if `value` is classified as a typed array.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 * @example
 *
 * _.isTypedArray(new Uint8Array);
 * // => true
 *
 * _.isTypedArray([]);
 * // => false
 */
var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;

/** Used for built-in method references. */
var objectProto$2 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$1 = objectProto$2.hasOwnProperty;

/**
 * Creates an array of the enumerable property names of the array-like `value`.
 *
 * @private
 * @param {*} value The value to query.
 * @param {boolean} inherited Specify returning inherited property names.
 * @returns {Array} Returns the array of property names.
 */
function arrayLikeKeys(value, inherited) {
  var isArr = isArray(value),
      isArg = !isArr && isArguments(value),
      isBuff = !isArr && !isArg && isBuffer(value),
      isType = !isArr && !isArg && !isBuff && isTypedArray(value),
      skipIndexes = isArr || isArg || isBuff || isType,
      result = skipIndexes ? baseTimes(value.length, String) : [],
      length = result.length;

  for (var key in value) {
    if ((inherited || hasOwnProperty$1.call(value, key)) &&
        !(skipIndexes && (
           // Safari 9 has enumerable `arguments.length` in strict mode.
           key == 'length' ||
           // Node.js 0.10 has enumerable non-index properties on buffers.
           (isBuff && (key == 'offset' || key == 'parent')) ||
           // PhantomJS 2 has enumerable non-index properties on typed arrays.
           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
           // Skip index properties.
           isIndex(key, length)
        ))) {
      result.push(key);
    }
  }
  return result;
}

/** Used for built-in method references. */
var objectProto$5 = Object.prototype;

/**
 * Checks if `value` is likely a prototype object.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
 */
function isPrototype(value) {
  var Ctor = value && value.constructor,
      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$5;

  return value === proto;
}

/**
 * Creates a unary function that invokes `func` with its argument transformed.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {Function} transform The argument transform.
 * @returns {Function} Returns the new function.
 */
function overArg(func, transform) {
  return function(arg) {
    return func(transform(arg));
  };
}

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeKeys = overArg(Object.keys, Object);

/** Used for built-in method references. */
var objectProto$4 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$3 = objectProto$4.hasOwnProperty;

/**
 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function baseKeys(object) {
  if (!isPrototype(object)) {
    return nativeKeys(object);
  }
  var result = [];
  for (var key in Object(object)) {
    if (hasOwnProperty$3.call(object, key) && key != 'constructor') {
      result.push(key);
    }
  }
  return result;
}

/**
 * Creates an array of the own enumerable property names of `object`.
 *
 * **Note:** Non-object values are coerced to objects. See the
 * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
 * for more details.
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Object
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 *   this.b = 2;
 * }
 *
 * Foo.prototype.c = 3;
 *
 * _.keys(new Foo);
 * // => ['a', 'b'] (iteration order is not guaranteed)
 *
 * _.keys('hi');
 * // => ['0', '1']
 */
function keys(object) {
  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
}

function createArrayIterator(coll) {
    var i = -1;
    var len = coll.length;
    return function next() {
        return ++i < len ? {value: coll[i], key: i} : null;
    }
}

function createES2015Iterator(iterator) {
    var i = -1;
    return function next() {
        var item = iterator.next();
        if (item.done)
            return null;
        i++;
        return {value: item.value, key: i};
    }
}

function createObjectIterator(obj) {
    var okeys = keys(obj);
    var i = -1;
    var len = okeys.length;
    return function next() {
        var key = okeys[++i];
        return i < len ? {value: obj[key], key: key} : null;
    };
}

function iterator(coll) {
    if (isArrayLike(coll)) {
        return createArrayIterator(coll);
    }

    var iterator = getIterator(coll);
    return iterator ? createES2015Iterator(iterator) : createObjectIterator(coll);
}

function onlyOnce(fn) {
    return function() {
        if (fn === null) throw new Error("Callback was already called.");
        var callFn = fn;
        fn = null;
        callFn.apply(this, arguments);
    };
}

function _eachOfLimit(limit) {
    return function (obj, iteratee, callback) {
        callback = once(callback || noop);
        if (limit <= 0 || !obj) {
            return callback(null);
        }
        var nextElem = iterator(obj);
        var done = false;
        var running = 0;

        function iterateeCallback(err, value) {
            running -= 1;
            if (err) {
                done = true;
                callback(err);
            }
            else if (value === breakLoop || (done && running <= 0)) {
                done = true;
                return callback(null);
            }
            else {
                replenish();
            }
        }

        function replenish () {
            while (running < limit && !done) {
                var elem = nextElem();
                if (elem === null) {
                    done = true;
                    if (running <= 0) {
                        callback(null);
                    }
                    return;
                }
                running += 1;
                iteratee(elem.value, elem.key, onlyOnce(iterateeCallback));
            }
        }

        replenish();
    };
}

/**
 * The same as [`eachOf`]{@link module:Collections.eachOf} but runs a maximum of `limit` async operations at a
 * time.
 *
 * @name eachOfLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.eachOf]{@link module:Collections.eachOf}
 * @alias forEachOfLimit
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - An async function to apply to each
 * item in `coll`. The `key` is the item's key, or index in the case of an
 * array.
 * Invoked with (item, key, callback).
 * @param {Function} [callback] - A callback which is called when all
 * `iteratee` functions have finished, or an error occurs. Invoked with (err).
 */
function eachOfLimit(coll, limit, iteratee, callback) {
    _eachOfLimit(limit)(coll, wrapAsync(iteratee), callback);
}

function doLimit(fn, limit) {
    return function (iterable, iteratee, callback) {
        return fn(iterable, limit, iteratee, callback);
    };
}

// eachOf implementation optimized for array-likes
function eachOfArrayLike(coll, iteratee, callback) {
    callback = once(callback || noop);
    var index = 0,
        completed = 0,
        length = coll.length;
    if (length === 0) {
        callback(null);
    }

    function iteratorCallback(err, value) {
        if (err) {
            callback(err);
        } else if ((++completed === length) || value === breakLoop) {
            callback(null);
        }
    }

    for (; index < length; index++) {
        iteratee(coll[index], index, onlyOnce(iteratorCallback));
    }
}

// a generic version of eachOf which can handle array, object, and iterator cases.
var eachOfGeneric = doLimit(eachOfLimit, Infinity);

/**
 * Like [`each`]{@link module:Collections.each}, except that it passes the key (or index) as the second argument
 * to the iteratee.
 *
 * @name eachOf
 * @static
 * @memberOf module:Collections
 * @method
 * @alias forEachOf
 * @category Collection
 * @see [async.each]{@link module:Collections.each}
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - A function to apply to each
 * item in `coll`.
 * The `key` is the item's key, or index in the case of an array.
 * Invoked with (item, key, callback).
 * @param {Function} [callback] - A callback which is called when all
 * `iteratee` functions have finished, or an error occurs. Invoked with (err).
 * @example
 *
 * var obj = {dev: "/dev.json", test: "/test.json", prod: "/prod.json"};
 * var configs = {};
 *
 * async.forEachOf(obj, function (value, key, callback) {
 *     fs.readFile(__dirname + value, "utf8", function (err, data) {
 *         if (err) return callback(err);
 *         try {
 *             configs[key] = JSON.parse(data);
 *         } catch (e) {
 *             return callback(e);
 *         }
 *         callback();
 *     });
 * }, function (err) {
 *     if (err) console.error(err.message);
 *     // configs is now a map of JSON data
 *     doSomethingWith(configs);
 * });
 */
var eachOf = function(coll, iteratee, callback) {
    var eachOfImplementation = isArrayLike(coll) ? eachOfArrayLike : eachOfGeneric;
    eachOfImplementation(coll, wrapAsync(iteratee), callback);
};

function doParallel(fn) {
    return function (obj, iteratee, callback) {
        return fn(eachOf, obj, wrapAsync(iteratee), callback);
    };
}

function _asyncMap(eachfn, arr, iteratee, callback) {
    callback = callback || noop;
    arr = arr || [];
    var results = [];
    var counter = 0;
    var _iteratee = wrapAsync(iteratee);

    eachfn(arr, function (value, _, callback) {
        var index = counter++;
        _iteratee(value, function (err, v) {
            results[index] = v;
            callback(err);
        });
    }, function (err) {
        callback(err, results);
    });
}

/**
 * Produces a new collection of values by mapping each value in `coll` through
 * the `iteratee` function. The `iteratee` is called with an item from `coll`
 * and a callback for when it has finished processing. Each of these callback
 * takes 2 arguments: an `error`, and the transformed item from `coll`. If
 * `iteratee` passes an error to its callback, the main `callback` (for the
 * `map` function) is immediately called with the error.
 *
 * Note, that since this function applies the `iteratee` to each item in
 * parallel, there is no guarantee that the `iteratee` functions will complete
 * in order. However, the results array will be in the same order as the
 * original `coll`.
 *
 * If `map` is passed an Object, the results will be an Array.  The results
 * will roughly be in the order of the original Objects' keys (but this can
 * vary across JavaScript engines).
 *
 * @name map
 * @static
 * @memberOf module:Collections
 * @method
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The iteratee should complete with the transformed item.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. Results is an Array of the
 * transformed items from the `coll`. Invoked with (err, results).
 * @example
 *
 * async.map(['file1','file2','file3'], fs.stat, function(err, results) {
 *     // results is now an array of stats for each file
 * });
 */
var map = doParallel(_asyncMap);

/**
 * Applies the provided arguments to each function in the array, calling
 * `callback` after all functions have completed. If you only provide the first
 * argument, `fns`, then it will return a function which lets you pass in the
 * arguments as if it were a single function call. If more arguments are
 * provided, `callback` is required while `args` is still optional.
 *
 * @name applyEach
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Array|Iterable|Object} fns - A collection of {@link AsyncFunction}s
 * to all call with the same arguments
 * @param {...*} [args] - any number of separate arguments to pass to the
 * function.
 * @param {Function} [callback] - the final argument should be the callback,
 * called when all functions have completed processing.
 * @returns {Function} - If only the first argument, `fns`, is provided, it will
 * return a function which lets you pass in the arguments as if it were a single
 * function call. The signature is `(..args, callback)`. If invoked with any
 * arguments, `callback` is required.
 * @example
 *
 * async.applyEach([enableSearch, updateSchema], 'bucket', callback);
 *
 * // partial application example:
 * async.each(
 *     buckets,
 *     async.applyEach([enableSearch, updateSchema]),
 *     callback
 * );
 */
var applyEach = applyEach$1(map);

function doParallelLimit(fn) {
    return function (obj, limit, iteratee, callback) {
        return fn(_eachOfLimit(limit), obj, wrapAsync(iteratee), callback);
    };
}

/**
 * The same as [`map`]{@link module:Collections.map} but runs a maximum of `limit` async operations at a time.
 *
 * @name mapLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.map]{@link module:Collections.map}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The iteratee should complete with the transformed item.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. Results is an array of the
 * transformed items from the `coll`. Invoked with (err, results).
 */
var mapLimit = doParallelLimit(_asyncMap);

/**
 * The same as [`map`]{@link module:Collections.map} but runs only a single async operation at a time.
 *
 * @name mapSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.map]{@link module:Collections.map}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The iteratee should complete with the transformed item.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. Results is an array of the
 * transformed items from the `coll`. Invoked with (err, results).
 */
var mapSeries = doLimit(mapLimit, 1);

/**
 * The same as [`applyEach`]{@link module:ControlFlow.applyEach} but runs only a single async operation at a time.
 *
 * @name applyEachSeries
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.applyEach]{@link module:ControlFlow.applyEach}
 * @category Control Flow
 * @param {Array|Iterable|Object} fns - A collection of {@link AsyncFunction}s to all
 * call with the same arguments
 * @param {...*} [args] - any number of separate arguments to pass to the
 * function.
 * @param {Function} [callback] - the final argument should be the callback,
 * called when all functions have completed processing.
 * @returns {Function} - If only the first argument is provided, it will return
 * a function which lets you pass in the arguments as if it were a single
 * function call.
 */
var applyEachSeries = applyEach$1(mapSeries);

/**
 * A specialized version of `_.forEach` for arrays without support for
 * iteratee shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns `array`.
 */
function arrayEach(array, iteratee) {
  var index = -1,
      length = array == null ? 0 : array.length;

  while (++index < length) {
    if (iteratee(array[index], index, array) === false) {
      break;
    }
  }
  return array;
}

/**
 * Creates a base function for methods like `_.forIn` and `_.forOwn`.
 *
 * @private
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {Function} Returns the new base function.
 */
function createBaseFor(fromRight) {
  return function(object, iteratee, keysFunc) {
    var index = -1,
        iterable = Object(object),
        props = keysFunc(object),
        length = props.length;

    while (length--) {
      var key = props[fromRight ? length : ++index];
      if (iteratee(iterable[key], key, iterable) === false) {
        break;
      }
    }
    return object;
  };
}

/**
 * The base implementation of `baseForOwn` which iterates over `object`
 * properties returned by `keysFunc` and invokes `iteratee` for each property.
 * Iteratee functions may exit iteration early by explicitly returning `false`.
 *
 * @private
 * @param {Object} object The object to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @param {Function} keysFunc The function to get the keys of `object`.
 * @returns {Object} Returns `object`.
 */
var baseFor = createBaseFor();

/**
 * The base implementation of `_.forOwn` without support for iteratee shorthands.
 *
 * @private
 * @param {Object} object The object to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Object} Returns `object`.
 */
function baseForOwn(object, iteratee) {
  return object && baseFor(object, iteratee, keys);
}

/**
 * The base implementation of `_.findIndex` and `_.findLastIndex` without
 * support for iteratee shorthands.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {Function} predicate The function invoked per iteration.
 * @param {number} fromIndex The index to search from.
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function baseFindIndex(array, predicate, fromIndex, fromRight) {
  var length = array.length,
      index = fromIndex + (fromRight ? 1 : -1);

  while ((fromRight ? index-- : ++index < length)) {
    if (predicate(array[index], index, array)) {
      return index;
    }
  }
  return -1;
}

/**
 * The base implementation of `_.isNaN` without support for number objects.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
 */
function baseIsNaN(value) {
  return value !== value;
}

/**
 * A specialized version of `_.indexOf` which performs strict equality
 * comparisons of values, i.e. `===`.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} value The value to search for.
 * @param {number} fromIndex The index to search from.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function strictIndexOf(array, value, fromIndex) {
  var index = fromIndex - 1,
      length = array.length;

  while (++index < length) {
    if (array[index] === value) {
      return index;
    }
  }
  return -1;
}

/**
 * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} value The value to search for.
 * @param {number} fromIndex The index to search from.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function baseIndexOf(array, value, fromIndex) {
  return value === value
    ? strictIndexOf(array, value, fromIndex)
    : baseFindIndex(array, baseIsNaN, fromIndex);
}

/**
 * Determines the best order for running the {@link AsyncFunction}s in `tasks`, based on
 * their requirements. Each function can optionally depend on other functions
 * being completed first, and each function is run as soon as its requirements
 * are satisfied.
 *
 * If any of the {@link AsyncFunction}s pass an error to their callback, the `auto` sequence
 * will stop. Further tasks will not execute (so any other functions depending
 * on it will not run), and the main `callback` is immediately called with the
 * error.
 *
 * {@link AsyncFunction}s also receive an object containing the results of functions which
 * have completed so far as the first argument, if they have dependencies. If a
 * task function has no dependencies, it will only be passed a callback.
 *
 * @name auto
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Object} tasks - An object. Each of its properties is either a
 * function or an array of requirements, with the {@link AsyncFunction} itself the last item
 * in the array. The object's key of a property serves as the name of the task
 * defined by that property, i.e. can be used when specifying requirements for
 * other tasks. The function receives one or two arguments:
 * * a `results` object, containing the results of the previously executed
 *   functions, only passed if the task has any dependencies,
 * * a `callback(err, result)` function, which must be called when finished,
 *   passing an `error` (which can be `null`) and the result of the function's
 *   execution.
 * @param {number} [concurrency=Infinity] - An optional `integer` for
 * determining the maximum number of tasks that can be run in parallel. By
 * default, as many as possible.
 * @param {Function} [callback] - An optional callback which is called when all
 * the tasks have been completed. It receives the `err` argument if any `tasks`
 * pass an error to their callback. Results are always returned; however, if an
 * error occurs, no further `tasks` will be performed, and the results object
 * will only contain partial results. Invoked with (err, results).
 * @returns undefined
 * @example
 *
 * async.auto({
 *     // this function will just be passed a callback
 *     readData: async.apply(fs.readFile, 'data.txt', 'utf-8'),
 *     showData: ['readData', function(results, cb) {
 *         // results.readData is the file's contents
 *         // ...
 *     }]
 * }, callback);
 *
 * async.auto({
 *     get_data: function(callback) {
 *         console.log('in get_data');
 *         // async code to get some data
 *         callback(null, 'data', 'converted to array');
 *     },
 *     make_folder: function(callback) {
 *         console.log('in make_folder');
 *         // async code to create a directory to store a file in
 *         // this is run at the same time as getting the data
 *         callback(null, 'folder');
 *     },
 *     write_file: ['get_data', 'make_folder', function(results, callback) {
 *         console.log('in write_file', JSON.stringify(results));
 *         // once there is some data and the directory exists,
 *         // write the data to a file in the directory
 *         callback(null, 'filename');
 *     }],
 *     email_link: ['write_file', function(results, callback) {
 *         console.log('in email_link', JSON.stringify(results));
 *         // once the file is written let's email a link to it...
 *         // results.write_file contains the filename returned by write_file.
 *         callback(null, {'file':results.write_file, 'email':'user@example.com'});
 *     }]
 * }, function(err, results) {
 *     console.log('err = ', err);
 *     console.log('results = ', results);
 * });
 */
var auto = function (tasks, concurrency, callback) {
    if (typeof concurrency === 'function') {
        // concurrency is optional, shift the args.
        callback = concurrency;
        concurrency = null;
    }
    callback = once(callback || noop);
    var keys$$1 = keys(tasks);
    var numTasks = keys$$1.length;
    if (!numTasks) {
        return callback(null);
    }
    if (!concurrency) {
        concurrency = numTasks;
    }

    var results = {};
    var runningTasks = 0;
    var hasError = false;

    var listeners = Object.create(null);

    var readyTasks = [];

    // for cycle detection:
    var readyToCheck = []; // tasks that have been identified as reachable
    // without the possibility of returning to an ancestor task
    var uncheckedDependencies = {};

    baseForOwn(tasks, function (task, key) {
        if (!isArray(task)) {
            // no dependencies
            enqueueTask(key, [task]);
            readyToCheck.push(key);
            return;
        }

        var dependencies = task.slice(0, task.length - 1);
        var remainingDependencies = dependencies.length;
        if (remainingDependencies === 0) {
            enqueueTask(key, task);
            readyToCheck.push(key);
            return;
        }
        uncheckedDependencies[key] = remainingDependencies;

        arrayEach(dependencies, function (dependencyName) {
            if (!tasks[dependencyName]) {
                throw new Error('async.auto task `' + key +
                    '` has a non-existent dependency `' +
                    dependencyName + '` in ' +
                    dependencies.join(', '));
            }
            addListener(dependencyName, function () {
                remainingDependencies--;
                if (remainingDependencies === 0) {
                    enqueueTask(key, task);
                }
            });
        });
    });

    checkForDeadlocks();
    processQueue();

    function enqueueTask(key, task) {
        readyTasks.push(function () {
            runTask(key, task);
        });
    }

    function processQueue() {
        if (readyTasks.length === 0 && runningTasks === 0) {
            return callback(null, results);
        }
        while(readyTasks.length && runningTasks < concurrency) {
            var run = readyTasks.shift();
            run();
        }

    }

    function addListener(taskName, fn) {
        var taskListeners = listeners[taskName];
        if (!taskListeners) {
            taskListeners = listeners[taskName] = [];
        }

        taskListeners.push(fn);
    }

    function taskComplete(taskName) {
        var taskListeners = listeners[taskName] || [];
        arrayEach(taskListeners, function (fn) {
            fn();
        });
        processQueue();
    }


    function runTask(key, task) {
        if (hasError) return;

        var taskCallback = onlyOnce(function(err, result) {
            runningTasks--;
            if (arguments.length > 2) {
                result = slice(arguments, 1);
            }
            if (err) {
                var safeResults = {};
                baseForOwn(results, function(val, rkey) {
                    safeResults[rkey] = val;
                });
                safeResults[key] = result;
                hasError = true;
                listeners = Object.create(null);

                callback(err, safeResults);
            } else {
                results[key] = result;
                taskComplete(key);
            }
        });

        runningTasks++;
        var taskFn = wrapAsync(task[task.length - 1]);
        if (task.length > 1) {
            taskFn(results, taskCallback);
        } else {
            taskFn(taskCallback);
        }
    }

    function checkForDeadlocks() {
        // Kahn's algorithm
        // https://en.wikipedia.org/wiki/Topological_sorting#Kahn.27s_algorithm
        // http://connalle.blogspot.com/2013/10/topological-sortingkahn-algorithm.html
        var currentTask;
        var counter = 0;
        while (readyToCheck.length) {
            currentTask = readyToCheck.pop();
            counter++;
            arrayEach(getDependents(currentTask), function (dependent) {
                if (--uncheckedDependencies[dependent] === 0) {
                    readyToCheck.push(dependent);
                }
            });
        }

        if (counter !== numTasks) {
            throw new Error(
                'async.auto cannot execute tasks due to a recursive dependency'
            );
        }
    }

    function getDependents(taskName) {
        var result = [];
        baseForOwn(tasks, function (task, key) {
            if (isArray(task) && baseIndexOf(task, taskName, 0) >= 0) {
                result.push(key);
            }
        });
        return result;
    }
};

/**
 * A specialized version of `_.map` for arrays without support for iteratee
 * shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the new mapped array.
 */
function arrayMap(array, iteratee) {
  var index = -1,
      length = array == null ? 0 : array.length,
      result = Array(length);

  while (++index < length) {
    result[index] = iteratee(array[index], index, array);
  }
  return result;
}

/** `Object#toString` result references. */
var symbolTag = '[object Symbol]';

/**
 * Checks if `value` is classified as a `Symbol` primitive or object.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
 * @example
 *
 * _.isSymbol(Symbol.iterator);
 * // => true
 *
 * _.isSymbol('abc');
 * // => false
 */
function isSymbol(value) {
  return typeof value == 'symbol' ||
    (isObjectLike(value) && baseGetTag(value) == symbolTag);
}

/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0;

/** Used to convert symbols to primitives and strings. */
var symbolProto = Symbol$1 ? Symbol$1.prototype : undefined;
var symbolToString = symbolProto ? symbolProto.toString : undefined;

/**
 * The base implementation of `_.toString` which doesn't convert nullish
 * values to empty strings.
 *
 * @private
 * @param {*} value The value to process.
 * @returns {string} Returns the string.
 */
function baseToString(value) {
  // Exit early for strings to avoid a performance hit in some environments.
  if (typeof value == 'string') {
    return value;
  }
  if (isArray(value)) {
    // Recursively convert values (susceptible to call stack limits).
    return arrayMap(value, baseToString) + '';
  }
  if (isSymbol(value)) {
    return symbolToString ? symbolToString.call(value) : '';
  }
  var result = (value + '');
  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}

/**
 * The base implementation of `_.slice` without an iteratee call guard.
 *
 * @private
 * @param {Array} array The array to slice.
 * @param {number} [start=0] The start position.
 * @param {number} [end=array.length] The end position.
 * @returns {Array} Returns the slice of `array`.
 */
function baseSlice(array, start, end) {
  var index = -1,
      length = array.length;

  if (start < 0) {
    start = -start > length ? 0 : (length + start);
  }
  end = end > length ? length : end;
  if (end < 0) {
    end += length;
  }
  length = start > end ? 0 : ((end - start) >>> 0);
  start >>>= 0;

  var result = Array(length);
  while (++index < length) {
    result[index] = array[index + start];
  }
  return result;
}

/**
 * Casts `array` to a slice if it's needed.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {number} start The start position.
 * @param {number} [end=array.length] The end position.
 * @returns {Array} Returns the cast slice.
 */
function castSlice(array, start, end) {
  var length = array.length;
  end = end === undefined ? length : end;
  return (!start && end >= length) ? array : baseSlice(array, start, end);
}

/**
 * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
 * that is not found in the character symbols.
 *
 * @private
 * @param {Array} strSymbols The string symbols to inspect.
 * @param {Array} chrSymbols The character symbols to find.
 * @returns {number} Returns the index of the last unmatched string symbol.
 */
function charsEndIndex(strSymbols, chrSymbols) {
  var index = strSymbols.length;

  while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
  return index;
}

/**
 * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
 * that is not found in the character symbols.
 *
 * @private
 * @param {Array} strSymbols The string symbols to inspect.
 * @param {Array} chrSymbols The character symbols to find.
 * @returns {number} Returns the index of the first unmatched string symbol.
 */
function charsStartIndex(strSymbols, chrSymbols) {
  var index = -1,
      length = strSymbols.length;

  while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
  return index;
}

/**
 * Converts an ASCII `string` to an array.
 *
 * @private
 * @param {string} string The string to convert.
 * @returns {Array} Returns the converted array.
 */
function asciiToArray(string) {
  return string.split('');
}

/** Used to compose unicode character classes. */
var rsAstralRange = '\\ud800-\\udfff';
var rsComboMarksRange = '\\u0300-\\u036f';
var reComboHalfMarksRange = '\\ufe20-\\ufe2f';
var rsComboSymbolsRange = '\\u20d0-\\u20ff';
var rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange;
var rsVarRange = '\\ufe0e\\ufe0f';

/** Used to compose unicode capture groups. */
var rsZWJ = '\\u200d';

/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboRange + rsVarRange + ']');

/**
 * Checks if `string` contains Unicode symbols.
 *
 * @private
 * @param {string} string The string to inspect.
 * @returns {boolean} Returns `true` if a symbol is found, else `false`.
 */
function hasUnicode(string) {
  return reHasUnicode.test(string);
}

/** Used to compose unicode character classes. */
var rsAstralRange$1 = '\\ud800-\\udfff';
var rsComboMarksRange$1 = '\\u0300-\\u036f';
var reComboHalfMarksRange$1 = '\\ufe20-\\ufe2f';
var rsComboSymbolsRange$1 = '\\u20d0-\\u20ff';
var rsComboRange$1 = rsComboMarksRange$1 + reComboHalfMarksRange$1 + rsComboSymbolsRange$1;
var rsVarRange$1 = '\\ufe0e\\ufe0f';

/** Used to compose unicode capture groups. */
var rsAstral = '[' + rsAstralRange$1 + ']';
var rsCombo = '[' + rsComboRange$1 + ']';
var rsFitz = '\\ud83c[\\udffb-\\udfff]';
var rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')';
var rsNonAstral = '[^' + rsAstralRange$1 + ']';
var rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}';
var rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]';
var rsZWJ$1 = '\\u200d';

/** Used to compose unicode regexes. */
var reOptMod = rsModifier + '?';
var rsOptVar = '[' + rsVarRange$1 + ']?';
var rsOptJoin = '(?:' + rsZWJ$1 + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*';
var rsSeq = rsOptVar + reOptMod + rsOptJoin;
var rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';

/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');

/**
 * Converts a Unicode `string` to an array.
 *
 * @private
 * @param {string} string The string to convert.
 * @returns {Array} Returns the converted array.
 */
function unicodeToArray(string) {
  return string.match(reUnicode) || [];
}

/**
 * Converts `string` to an array.
 *
 * @private
 * @param {string} string The string to convert.
 * @returns {Array} Returns the converted array.
 */
function stringToArray(string) {
  return hasUnicode(string)
    ? unicodeToArray(string)
    : asciiToArray(string);
}

/**
 * Converts `value` to a string. An empty string is returned for `null`
 * and `undefined` values. The sign of `-0` is preserved.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 * @example
 *
 * _.toString(null);
 * // => ''
 *
 * _.toString(-0);
 * // => '-0'
 *
 * _.toString([1, 2, 3]);
 * // => '1,2,3'
 */
function toString(value) {
  return value == null ? '' : baseToString(value);
}

/** Used to match leading and trailing whitespace. */
var reTrim = /^\s+|\s+$/g;

/**
 * Removes leading and trailing whitespace or specified characters from `string`.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category String
 * @param {string} [string=''] The string to trim.
 * @param {string} [chars=whitespace] The characters to trim.
 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
 * @returns {string} Returns the trimmed string.
 * @example
 *
 * _.trim('  abc  ');
 * // => 'abc'
 *
 * _.trim('-_-abc-_-', '_-');
 * // => 'abc'
 *
 * _.map(['  foo  ', '  bar  '], _.trim);
 * // => ['foo', 'bar']
 */
function trim(string, chars, guard) {
  string = toString(string);
  if (string && (guard || chars === undefined)) {
    return string.replace(reTrim, '');
  }
  if (!string || !(chars = baseToString(chars))) {
    return string;
  }
  var strSymbols = stringToArray(string),
      chrSymbols = stringToArray(chars),
      start = charsStartIndex(strSymbols, chrSymbols),
      end = charsEndIndex(strSymbols, chrSymbols) + 1;

  return castSlice(strSymbols, start, end).join('');
}

var FN_ARGS = /^(?:async\s+)?(function)?\s*[^\(]*\(\s*([^\)]*)\)/m;
var FN_ARG_SPLIT = /,/;
var FN_ARG = /(=.+)?(\s*)$/;
var STRIP_COMMENTS = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/mg;

function parseParams(func) {
    func = func.toString().replace(STRIP_COMMENTS, '');
    func = func.match(FN_ARGS)[2].replace(' ', '');
    func = func ? func.split(FN_ARG_SPLIT) : [];
    func = func.map(function (arg){
        return trim(arg.replace(FN_ARG, ''));
    });
    return func;
}

/**
 * A dependency-injected version of the [async.auto]{@link module:ControlFlow.auto} function. Dependent
 * tasks are specified as parameters to the function, after the usual callback
 * parameter, with the parameter names matching the names of the tasks it
 * depends on. This can provide even more readable task graphs which can be
 * easier to maintain.
 *
 * If a final callback is specified, the task results are similarly injected,
 * specified as named parameters after the initial error parameter.
 *
 * The autoInject function is purely syntactic sugar and its semantics are
 * otherwise equivalent to [async.auto]{@link module:ControlFlow.auto}.
 *
 * @name autoInject
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.auto]{@link module:ControlFlow.auto}
 * @category Control Flow
 * @param {Object} tasks - An object, each of whose properties is an {@link AsyncFunction} of
 * the form 'func([dependencies...], callback). The object's key of a property
 * serves as the name of the task defined by that property, i.e. can be used
 * when specifying requirements for other tasks.
 * * The `callback` parameter is a `callback(err, result)` which must be called
 *   when finished, passing an `error` (which can be `null`) and the result of
 *   the function's execution. The remaining parameters name other tasks on
 *   which the task is dependent, and the results from those tasks are the
 *   arguments of those parameters.
 * @param {Function} [callback] - An optional callback which is called when all
 * the tasks have been completed. It receives the `err` argument if any `tasks`
 * pass an error to their callback, and a `results` object with any completed
 * task results, similar to `auto`.
 * @example
 *
 * //  The example from `auto` can be rewritten as follows:
 * async.autoInject({
 *     get_data: function(callback) {
 *         // async code to get some data
 *         callback(null, 'data', 'converted to array');
 *     },
 *     make_folder: function(callback) {
 *         // async code to create a directory to store a file in
 *         // this is run at the same time as getting the data
 *         callback(null, 'folder');
 *     },
 *     write_file: function(get_data, make_folder, callback) {
 *         // once there is some data and the directory exists,
 *         // write the data to a file in the directory
 *         callback(null, 'filename');
 *     },
 *     email_link: function(write_file, callback) {
 *         // once the file is written let's email a link to it...
 *         // write_file contains the filename returned by write_file.
 *         callback(null, {'file':write_file, 'email':'user@example.com'});
 *     }
 * }, function(err, results) {
 *     console.log('err = ', err);
 *     console.log('email_link = ', results.email_link);
 * });
 *
 * // If you are using a JS minifier that mangles parameter names, `autoInject`
 * // will not work with plain functions, since the parameter names will be
 * // collapsed to a single letter identifier.  To work around this, you can
 * // explicitly specify the names of the parameters your task function needs
 * // in an array, similar to Angular.js dependency injection.
 *
 * // This still has an advantage over plain `auto`, since the results a task
 * // depends on are still spread into arguments.
 * async.autoInject({
 *     //...
 *     write_file: ['get_data', 'make_folder', function(get_data, make_folder, callback) {
 *         callback(null, 'filename');
 *     }],
 *     email_link: ['write_file', function(write_file, callback) {
 *         callback(null, {'file':write_file, 'email':'user@example.com'});
 *     }]
 *     //...
 * }, function(err, results) {
 *     console.log('err = ', err);
 *     console.log('email_link = ', results.email_link);
 * });
 */
function autoInject(tasks, callback) {
    var newTasks = {};

    baseForOwn(tasks, function (taskFn, key) {
        var params;
        var fnIsAsync = isAsync(taskFn);
        var hasNoDeps =
            (!fnIsAsync && taskFn.length === 1) ||
            (fnIsAsync && taskFn.length === 0);

        if (isArray(taskFn)) {
            params = taskFn.slice(0, -1);
            taskFn = taskFn[taskFn.length - 1];

            newTasks[key] = params.concat(params.length > 0 ? newTask : taskFn);
        } else if (hasNoDeps) {
            // no dependencies, use the function as-is
            newTasks[key] = taskFn;
        } else {
            params = parseParams(taskFn);
            if (taskFn.length === 0 && !fnIsAsync && params.length === 0) {
                throw new Error("autoInject task functions require explicit parameters.");
            }

            // remove callback param
            if (!fnIsAsync) params.pop();

            newTasks[key] = params.concat(newTask);
        }

        function newTask(results, taskCb) {
            var newArgs = arrayMap(params, function (name) {
                return results[name];
            });
            newArgs.push(taskCb);
            wrapAsync(taskFn).apply(null, newArgs);
        }
    });

    auto(newTasks, callback);
}

// Simple doubly linked list (https://en.wikipedia.org/wiki/Doubly_linked_list) implementation
// used for queues. This implementation assumes that the node provided by the user can be modified
// to adjust the next and last properties. We implement only the minimal functionality
// for queue support.
function DLL() {
    this.head = this.tail = null;
    this.length = 0;
}

function setInitial(dll, node) {
    dll.length = 1;
    dll.head = dll.tail = node;
}

DLL.prototype.removeLink = function(node) {
    if (node.prev) node.prev.next = node.next;
    else this.head = node.next;
    if (node.next) node.next.prev = node.prev;
    else this.tail = node.prev;

    node.prev = node.next = null;
    this.length -= 1;
    return node;
};

DLL.prototype.empty = function () {
    while(this.head) this.shift();
    return this;
};

DLL.prototype.insertAfter = function(node, newNode) {
    newNode.prev = node;
    newNode.next = node.next;
    if (node.next) node.next.prev = newNode;
    else this.tail = newNode;
    node.next = newNode;
    this.length += 1;
};

DLL.prototype.insertBefore = function(node, newNode) {
    newNode.prev = node.prev;
    newNode.next = node;
    if (node.prev) node.prev.next = newNode;
    else this.head = newNode;
    node.prev = newNode;
    this.length += 1;
};

DLL.prototype.unshift = function(node) {
    if (this.head) this.insertBefore(this.head, node);
    else setInitial(this, node);
};

DLL.prototype.push = function(node) {
    if (this.tail) this.insertAfter(this.tail, node);
    else setInitial(this, node);
};

DLL.prototype.shift = function() {
    return this.head && this.removeLink(this.head);
};

DLL.prototype.pop = function() {
    return this.tail && this.removeLink(this.tail);
};

DLL.prototype.toArray = function () {
    var arr = Array(this.length);
    var curr = this.head;
    for(var idx = 0; idx < this.length; idx++) {
        arr[idx] = curr.data;
        curr = curr.next;
    }
    return arr;
};

DLL.prototype.remove = function (testFn) {
    var curr = this.head;
    while(!!curr) {
        var next = curr.next;
        if (testFn(curr)) {
            this.removeLink(curr);
        }
        curr = next;
    }
    return this;
};

function queue(worker, concurrency, payload) {
    if (concurrency == null) {
        concurrency = 1;
    }
    else if(concurrency === 0) {
        throw new Error('Concurrency must not be zero');
    }

    var _worker = wrapAsync(worker);
    var numRunning = 0;
    var workersList = [];

    var processingScheduled = false;
    function _insert(data, insertAtFront, callback) {
        if (callback != null && typeof callback !== 'function') {
            throw new Error('task callback must be a function');
        }
        q.started = true;
        if (!isArray(data)) {
            data = [data];
        }
        if (data.length === 0 && q.idle()) {
            // call drain immediately if there are no tasks
            return setImmediate$1(function() {
                q.drain();
            });
        }

        for (var i = 0, l = data.length; i < l; i++) {
            var item = {
                data: data[i],
                callback: callback || noop
            };

            if (insertAtFront) {
                q._tasks.unshift(item);
            } else {
                q._tasks.push(item);
            }
        }

        if (!processingScheduled) {
            processingScheduled = true;
            setImmediate$1(function() {
                processingScheduled = false;
                q.process();
            });
        }
    }

    function _next(tasks) {
        return function(err){
            numRunning -= 1;

            for (var i = 0, l = tasks.length; i < l; i++) {
                var task = tasks[i];

                var index = baseIndexOf(workersList, task, 0);
                if (index === 0) {
                    workersList.shift();
                } else if (index > 0) {
                    workersList.splice(index, 1);
                }

                task.callback.apply(task, arguments);

                if (err != null) {
                    q.error(err, task.data);
                }
            }

            if (numRunning <= (q.concurrency - q.buffer) ) {
                q.unsaturated();
            }

            if (q.idle()) {
                q.drain();
            }
            q.process();
        };
    }

    var isProcessing = false;
    var q = {
        _tasks: new DLL(),
        concurrency: concurrency,
        payload: payload,
        saturated: noop,
        unsaturated:noop,
        buffer: concurrency / 4,
        empty: noop,
        drain: noop,
        error: noop,
        started: false,
        paused: false,
        push: function (data, callback) {
            _insert(data, false, callback);
        },
        kill: function () {
            q.drain = noop;
            q._tasks.empty();
        },
        unshift: function (data, callback) {
            _insert(data, true, callback);
        },
        remove: function (testFn) {
            q._tasks.remove(testFn);
        },
        process: function () {
            // Avoid trying to start too many processing operations. This can occur
            // when callbacks resolve synchronously (#1267).
            if (isProcessing) {
                return;
            }
            isProcessing = true;
            while(!q.paused && numRunning < q.concurrency && q._tasks.length){
                var tasks = [], data = [];
                var l = q._tasks.length;
                if (q.payload) l = Math.min(l, q.payload);
                for (var i = 0; i < l; i++) {
                    var node = q._tasks.shift();
                    tasks.push(node);
                    workersList.push(node);
                    data.push(node.data);
                }

                numRunning += 1;

                if (q._tasks.length === 0) {
                    q.empty();
                }

                if (numRunning === q.concurrency) {
                    q.saturated();
                }

                var cb = onlyOnce(_next(tasks));
                _worker(data, cb);
            }
            isProcessing = false;
        },
        length: function () {
            return q._tasks.length;
        },
        running: function () {
            return numRunning;
        },
        workersList: function () {
            return workersList;
        },
        idle: function() {
            return q._tasks.length + numRunning === 0;
        },
        pause: function () {
            q.paused = true;
        },
        resume: function () {
            if (q.paused === false) { return; }
            q.paused = false;
            setImmediate$1(q.process);
        }
    };
    return q;
}

/**
 * A cargo of tasks for the worker function to complete. Cargo inherits all of
 * the same methods and event callbacks as [`queue`]{@link module:ControlFlow.queue}.
 * @typedef {Object} CargoObject
 * @memberOf module:ControlFlow
 * @property {Function} length - A function returning the number of items
 * waiting to be processed. Invoke like `cargo.length()`.
 * @property {number} payload - An `integer` for determining how many tasks
 * should be process per round. This property can be changed after a `cargo` is
 * created to alter the payload on-the-fly.
 * @property {Function} push - Adds `task` to the `queue`. The callback is
 * called once the `worker` has finished processing the task. Instead of a
 * single task, an array of `tasks` can be submitted. The respective callback is
 * used for every task in the list. Invoke like `cargo.push(task, [callback])`.
 * @property {Function} saturated - A callback that is called when the
 * `queue.length()` hits the concurrency and further tasks will be queued.
 * @property {Function} empty - A callback that is called when the last item
 * from the `queue` is given to a `worker`.
 * @property {Function} drain - A callback that is called when the last item
 * from the `queue` has returned from the `worker`.
 * @property {Function} idle - a function returning false if there are items
 * waiting or being processed, or true if not. Invoke like `cargo.idle()`.
 * @property {Function} pause - a function that pauses the processing of tasks
 * until `resume()` is called. Invoke like `cargo.pause()`.
 * @property {Function} resume - a function that resumes the processing of
 * queued tasks when the queue is paused. Invoke like `cargo.resume()`.
 * @property {Function} kill - a function that removes the `drain` callback and
 * empties remaining tasks from the queue forcing it to go idle. Invoke like `cargo.kill()`.
 */

/**
 * Creates a `cargo` object with the specified payload. Tasks added to the
 * cargo will be processed altogether (up to the `payload` limit). If the
 * `worker` is in progress, the task is queued until it becomes available. Once
 * the `worker` has completed some tasks, each callback of those tasks is
 * called. Check out [these](https://camo.githubusercontent.com/6bbd36f4cf5b35a0f11a96dcd2e97711ffc2fb37/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130382f62626330636662302d356632392d313165322d393734662d3333393763363464633835382e676966) [animations](https://camo.githubusercontent.com/f4810e00e1c5f5f8addbe3e9f49064fd5d102699/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130312f38346339323036362d356632392d313165322d383134662d3964336430323431336266642e676966)
 * for how `cargo` and `queue` work.
 *
 * While [`queue`]{@link module:ControlFlow.queue} passes only one task to one of a group of workers
 * at a time, cargo passes an array of tasks to a single worker, repeating
 * when the worker is finished.
 *
 * @name cargo
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.queue]{@link module:ControlFlow.queue}
 * @category Control Flow
 * @param {AsyncFunction} worker - An asynchronous function for processing an array
 * of queued tasks. Invoked with `(tasks, callback)`.
 * @param {number} [payload=Infinity] - An optional `integer` for determining
 * how many tasks should be processed per round; if omitted, the default is
 * unlimited.
 * @returns {module:ControlFlow.CargoObject} A cargo object to manage the tasks. Callbacks can
 * attached as certain properties to listen for specific events during the
 * lifecycle of the cargo and inner queue.
 * @example
 *
 * // create a cargo object with payload 2
 * var cargo = async.cargo(function(tasks, callback) {
 *     for (var i=0; i<tasks.length; i++) {
 *         console.log('hello ' + tasks[i].name);
 *     }
 *     callback();
 * }, 2);
 *
 * // add some items
 * cargo.push({name: 'foo'}, function(err) {
 *     console.log('finished processing foo');
 * });
 * cargo.push({name: 'bar'}, function(err) {
 *     console.log('finished processing bar');
 * });
 * cargo.push({name: 'baz'}, function(err) {
 *     console.log('finished processing baz');
 * });
 */
function cargo(worker, payload) {
    return queue(worker, 1, payload);
}

/**
 * The same as [`eachOf`]{@link module:Collections.eachOf} but runs only a single async operation at a time.
 *
 * @name eachOfSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.eachOf]{@link module:Collections.eachOf}
 * @alias forEachOfSeries
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * Invoked with (item, key, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. Invoked with (err).
 */
var eachOfSeries = doLimit(eachOfLimit, 1);

/**
 * Reduces `coll` into a single value using an async `iteratee` to return each
 * successive step. `memo` is the initial state of the reduction. This function
 * only operates in series.
 *
 * For performance reasons, it may make sense to split a call to this function
 * into a parallel map, and then use the normal `Array.prototype.reduce` on the
 * results. This function is for situations where each step in the reduction
 * needs to be async; if you can get the data before reducing it, then it's
 * probably a good idea to do so.
 *
 * @name reduce
 * @static
 * @memberOf module:Collections
 * @method
 * @alias inject
 * @alias foldl
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {*} memo - The initial state of the reduction.
 * @param {AsyncFunction} iteratee - A function applied to each item in the
 * array to produce the next step in the reduction.
 * The `iteratee` should complete with the next state of the reduction.
 * If the iteratee complete with an error, the reduction is stopped and the
 * main `callback` is immediately called with the error.
 * Invoked with (memo, item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Result is the reduced value. Invoked with
 * (err, result).
 * @example
 *
 * async.reduce([1,2,3], 0, function(memo, item, callback) {
 *     // pointless async:
 *     process.nextTick(function() {
 *         callback(null, memo + item)
 *     });
 * }, function(err, result) {
 *     // result is now equal to the last value of memo, which is 6
 * });
 */
function reduce(coll, memo, iteratee, callback) {
    callback = once(callback || noop);
    var _iteratee = wrapAsync(iteratee);
    eachOfSeries(coll, function(x, i, callback) {
        _iteratee(memo, x, function(err, v) {
            memo = v;
            callback(err);
        });
    }, function(err) {
        callback(err, memo);
    });
}

/**
 * Version of the compose function that is more natural to read. Each function
 * consumes the return value of the previous function. It is the equivalent of
 * [compose]{@link module:ControlFlow.compose} with the arguments reversed.
 *
 * Each function is executed with the `this` binding of the composed function.
 *
 * @name seq
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.compose]{@link module:ControlFlow.compose}
 * @category Control Flow
 * @param {...AsyncFunction} functions - the asynchronous functions to compose
 * @returns {Function} a function that composes the `functions` in order
 * @example
 *
 * // Requires lodash (or underscore), express3 and dresende's orm2.
 * // Part of an app, that fetches cats of the logged user.
 * // This example uses `seq` function to avoid overnesting and error
 * // handling clutter.
 * app.get('/cats', function(request, response) {
 *     var User = request.models.User;
 *     async.seq(
 *         _.bind(User.get, User),  // 'User.get' has signature (id, callback(err, data))
 *         function(user, fn) {
 *             user.getCats(fn);      // 'getCats' has signature (callback(err, data))
 *         }
 *     )(req.session.user_id, function (err, cats) {
 *         if (err) {
 *             console.error(err);
 *             response.json({ status: 'error', message: err.message });
 *         } else {
 *             response.json({ status: 'ok', message: 'Cats found', data: cats });
 *         }
 *     });
 * });
 */
function seq(/*...functions*/) {
    var _functions = arrayMap(arguments, wrapAsync);
    return function(/*...args*/) {
        var args = slice(arguments);
        var that = this;

        var cb = args[args.length - 1];
        if (typeof cb == 'function') {
            args.pop();
        } else {
            cb = noop;
        }

        reduce(_functions, args, function(newargs, fn, cb) {
            fn.apply(that, newargs.concat(function(err/*, ...nextargs*/) {
                var nextargs = slice(arguments, 1);
                cb(err, nextargs);
            }));
        },
        function(err, results) {
            cb.apply(that, [err].concat(results));
        });
    };
}

/**
 * Creates a function which is a composition of the passed asynchronous
 * functions. Each function consumes the return value of the function that
 * follows. Composing functions `f()`, `g()`, and `h()` would produce the result
 * of `f(g(h()))`, only this version uses callbacks to obtain the return values.
 *
 * Each function is executed with the `this` binding of the composed function.
 *
 * @name compose
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {...AsyncFunction} functions - the asynchronous functions to compose
 * @returns {Function} an asynchronous function that is the composed
 * asynchronous `functions`
 * @example
 *
 * function add1(n, callback) {
 *     setTimeout(function () {
 *         callback(null, n + 1);
 *     }, 10);
 * }
 *
 * function mul3(n, callback) {
 *     setTimeout(function () {
 *         callback(null, n * 3);
 *     }, 10);
 * }
 *
 * var add1mul3 = async.compose(mul3, add1);
 * add1mul3(4, function (err, result) {
 *     // result now equals 15
 * });
 */
var compose = function(/*...args*/) {
    return seq.apply(null, slice(arguments).reverse());
};

var _concat = Array.prototype.concat;

/**
 * The same as [`concat`]{@link module:Collections.concat} but runs a maximum of `limit` async operations at a time.
 *
 * @name concatLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.concat]{@link module:Collections.concat}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - A function to apply to each item in `coll`,
 * which should use an array as its result. Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished, or an error occurs. Results is an array
 * containing the concatenated results of the `iteratee` function. Invoked with
 * (err, results).
 */
var concatLimit = function(coll, limit, iteratee, callback) {
    callback = callback || noop;
    var _iteratee = wrapAsync(iteratee);
    mapLimit(coll, limit, function(val, callback) {
        _iteratee(val, function(err /*, ...args*/) {
            if (err) return callback(err);
            return callback(null, slice(arguments, 1));
        });
    }, function(err, mapResults) {
        var result = [];
        for (var i = 0; i < mapResults.length; i++) {
            if (mapResults[i]) {
                result = _concat.apply(result, mapResults[i]);
            }
        }

        return callback(err, result);
    });
};

/**
 * Applies `iteratee` to each item in `coll`, concatenating the results. Returns
 * the concatenated list. The `iteratee`s are called in parallel, and the
 * results are concatenated as they return. There is no guarantee that the
 * results array will be returned in the original order of `coll` passed to the
 * `iteratee` function.
 *
 * @name concat
 * @static
 * @memberOf module:Collections
 * @method
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - A function to apply to each item in `coll`,
 * which should use an array as its result. Invoked with (item, callback).
 * @param {Function} [callback(err)] - A callback which is called after all the
 * `iteratee` functions have finished, or an error occurs. Results is an array
 * containing the concatenated results of the `iteratee` function. Invoked with
 * (err, results).
 * @example
 *
 * async.concat(['dir1','dir2','dir3'], fs.readdir, function(err, files) {
 *     // files is now a list of filenames that exist in the 3 directories
 * });
 */
var concat = doLimit(concatLimit, Infinity);

/**
 * The same as [`concat`]{@link module:Collections.concat} but runs only a single async operation at a time.
 *
 * @name concatSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.concat]{@link module:Collections.concat}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - A function to apply to each item in `coll`.
 * The iteratee should complete with an array an array of results.
 * Invoked with (item, callback).
 * @param {Function} [callback(err)] - A callback which is called after all the
 * `iteratee` functions have finished, or an error occurs. Results is an array
 * containing the concatenated results of the `iteratee` function. Invoked with
 * (err, results).
 */
var concatSeries = doLimit(concatLimit, 1);

/**
 * Returns a function that when called, calls-back with the values provided.
 * Useful as the first function in a [`waterfall`]{@link module:ControlFlow.waterfall}, or for plugging values in to
 * [`auto`]{@link module:ControlFlow.auto}.
 *
 * @name constant
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {...*} arguments... - Any number of arguments to automatically invoke
 * callback with.
 * @returns {AsyncFunction} Returns a function that when invoked, automatically
 * invokes the callback with the previous given arguments.
 * @example
 *
 * async.waterfall([
 *     async.constant(42),
 *     function (value, next) {
 *         // value === 42
 *     },
 *     //...
 * ], callback);
 *
 * async.waterfall([
 *     async.constant(filename, "utf8"),
 *     fs.readFile,
 *     function (fileData, next) {
 *         //...
 *     }
 *     //...
 * ], callback);
 *
 * async.auto({
 *     hostname: async.constant("https://server.net/"),
 *     port: findFreePort,
 *     launchServer: ["hostname", "port", function (options, cb) {
 *         startServer(options, cb);
 *     }],
 *     //...
 * }, callback);
 */
var constant = function(/*...values*/) {
    var values = slice(arguments);
    var args = [null].concat(values);
    return function (/*...ignoredArgs, callback*/) {
        var callback = arguments[arguments.length - 1];
        return callback.apply(this, args);
    };
};

/**
 * This method returns the first argument it receives.
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Util
 * @param {*} value Any value.
 * @returns {*} Returns `value`.
 * @example
 *
 * var object = { 'a': 1 };
 *
 * console.log(_.identity(object) === object);
 * // => true
 */
function identity(value) {
  return value;
}

function _createTester(check, getResult) {
    return function(eachfn, arr, iteratee, cb) {
        cb = cb || noop;
        var testPassed = false;
        var testResult;
        eachfn(arr, function(value, _, callback) {
            iteratee(value, function(err, result) {
                if (err) {
                    callback(err);
                } else if (check(result) && !testResult) {
                    testPassed = true;
                    testResult = getResult(true, value);
                    callback(null, breakLoop);
                } else {
                    callback();
                }
            });
        }, function(err) {
            if (err) {
                cb(err);
            } else {
                cb(null, testPassed ? testResult : getResult(false));
            }
        });
    };
}

function _findGetResult(v, x) {
    return x;
}

/**
 * Returns the first value in `coll` that passes an async truth test. The
 * `iteratee` is applied in parallel, meaning the first iteratee to return
 * `true` will fire the detect `callback` with that result. That means the
 * result might not be the first item in the original `coll` (in terms of order)
 * that passes the test.

 * If order within the original `coll` is important, then look at
 * [`detectSeries`]{@link module:Collections.detectSeries}.
 *
 * @name detect
 * @static
 * @memberOf module:Collections
 * @method
 * @alias find
 * @category Collections
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - A truth test to apply to each item in `coll`.
 * The iteratee must complete with a boolean value as its result.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called as soon as any
 * iteratee returns `true`, or after all the `iteratee` functions have finished.
 * Result will be the first item in the array that passes the truth test
 * (iteratee) or the value `undefined` if none passed. Invoked with
 * (err, result).
 * @example
 *
 * async.detect(['file1','file2','file3'], function(filePath, callback) {
 *     fs.access(filePath, function(err) {
 *         callback(null, !err)
 *     });
 * }, function(err, result) {
 *     // result now equals the first file in the list that exists
 * });
 */
var detect = doParallel(_createTester(identity, _findGetResult));

/**
 * The same as [`detect`]{@link module:Collections.detect} but runs a maximum of `limit` async operations at a
 * time.
 *
 * @name detectLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.detect]{@link module:Collections.detect}
 * @alias findLimit
 * @category Collections
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - A truth test to apply to each item in `coll`.
 * The iteratee must complete with a boolean value as its result.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called as soon as any
 * iteratee returns `true`, or after all the `iteratee` functions have finished.
 * Result will be the first item in the array that passes the truth test
 * (iteratee) or the value `undefined` if none passed. Invoked with
 * (err, result).
 */
var detectLimit = doParallelLimit(_createTester(identity, _findGetResult));

/**
 * The same as [`detect`]{@link module:Collections.detect} but runs only a single async operation at a time.
 *
 * @name detectSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.detect]{@link module:Collections.detect}
 * @alias findSeries
 * @category Collections
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - A truth test to apply to each item in `coll`.
 * The iteratee must complete with a boolean value as its result.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called as soon as any
 * iteratee returns `true`, or after all the `iteratee` functions have finished.
 * Result will be the first item in the array that passes the truth test
 * (iteratee) or the value `undefined` if none passed. Invoked with
 * (err, result).
 */
var detectSeries = doLimit(detectLimit, 1);

function consoleFunc(name) {
    return function (fn/*, ...args*/) {
        var args = slice(arguments, 1);
        args.push(function (err/*, ...args*/) {
            var args = slice(arguments, 1);
            if (typeof console === 'object') {
                if (err) {
                    if (console.error) {
                        console.error(err);
                    }
                } else if (console[name]) {
                    arrayEach(args, function (x) {
                        console[name](x);
                    });
                }
            }
        });
        wrapAsync(fn).apply(null, args);
    };
}

/**
 * Logs the result of an [`async` function]{@link AsyncFunction} to the
 * `console` using `console.dir` to display the properties of the resulting object.
 * Only works in Node.js or in browsers that support `console.dir` and
 * `console.error` (such as FF and Chrome).
 * If multiple arguments are returned from the async function,
 * `console.dir` is called on each argument in order.
 *
 * @name dir
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {AsyncFunction} function - The function you want to eventually apply
 * all arguments to.
 * @param {...*} arguments... - Any number of arguments to apply to the function.
 * @example
 *
 * // in a module
 * var hello = function(name, callback) {
 *     setTimeout(function() {
 *         callback(null, {hello: name});
 *     }, 1000);
 * };
 *
 * // in the node repl
 * node> async.dir(hello, 'world');
 * {hello: 'world'}
 */
var dir = consoleFunc('dir');

/**
 * The post-check version of [`during`]{@link module:ControlFlow.during}. To reflect the difference in
 * the order of operations, the arguments `test` and `fn` are switched.
 *
 * Also a version of [`doWhilst`]{@link module:ControlFlow.doWhilst} with asynchronous `test` function.
 * @name doDuring
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.during]{@link module:ControlFlow.during}
 * @category Control Flow
 * @param {AsyncFunction} fn - An async function which is called each time
 * `test` passes. Invoked with (callback).
 * @param {AsyncFunction} test - asynchronous truth test to perform before each
 * execution of `fn`. Invoked with (...args, callback), where `...args` are the
 * non-error args from the previous callback of `fn`.
 * @param {Function} [callback] - A callback which is called after the test
 * function has failed and repeated execution of `fn` has stopped. `callback`
 * will be passed an error if one occurred, otherwise `null`.
 */
function doDuring(fn, test, callback) {
    callback = onlyOnce(callback || noop);
    var _fn = wrapAsync(fn);
    var _test = wrapAsync(test);

    function next(err/*, ...args*/) {
        if (err) return callback(err);
        var args = slice(arguments, 1);
        args.push(check);
        _test.apply(this, args);
    }

    function check(err, truth) {
        if (err) return callback(err);
        if (!truth) return callback(null);
        _fn(next);
    }

    check(null, true);

}

/**
 * The post-check version of [`whilst`]{@link module:ControlFlow.whilst}. To reflect the difference in
 * the order of operations, the arguments `test` and `iteratee` are switched.
 *
 * `doWhilst` is to `whilst` as `do while` is to `while` in plain JavaScript.
 *
 * @name doWhilst
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.whilst]{@link module:ControlFlow.whilst}
 * @category Control Flow
 * @param {AsyncFunction} iteratee - A function which is called each time `test`
 * passes. Invoked with (callback).
 * @param {Function} test - synchronous truth test to perform after each
 * execution of `iteratee`. Invoked with any non-error callback results of
 * `iteratee`.
 * @param {Function} [callback] - A callback which is called after the test
 * function has failed and repeated execution of `iteratee` has stopped.
 * `callback` will be passed an error and any arguments passed to the final
 * `iteratee`'s callback. Invoked with (err, [results]);
 */
function doWhilst(iteratee, test, callback) {
    callback = onlyOnce(callback || noop);
    var _iteratee = wrapAsync(iteratee);
    var next = function(err/*, ...args*/) {
        if (err) return callback(err);
        var args = slice(arguments, 1);
        if (test.apply(this, args)) return _iteratee(next);
        callback.apply(null, [null].concat(args));
    };
    _iteratee(next);
}

/**
 * Like ['doWhilst']{@link module:ControlFlow.doWhilst}, except the `test` is inverted. Note the
 * argument ordering differs from `until`.
 *
 * @name doUntil
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.doWhilst]{@link module:ControlFlow.doWhilst}
 * @category Control Flow
 * @param {AsyncFunction} iteratee - An async function which is called each time
 * `test` fails. Invoked with (callback).
 * @param {Function} test - synchronous truth test to perform after each
 * execution of `iteratee`. Invoked with any non-error callback results of
 * `iteratee`.
 * @param {Function} [callback] - A callback which is called after the test
 * function has passed and repeated execution of `iteratee` has stopped. `callback`
 * will be passed an error and any arguments passed to the final `iteratee`'s
 * callback. Invoked with (err, [results]);
 */
function doUntil(iteratee, test, callback) {
    doWhilst(iteratee, function() {
        return !test.apply(this, arguments);
    }, callback);
}

/**
 * Like [`whilst`]{@link module:ControlFlow.whilst}, except the `test` is an asynchronous function that
 * is passed a callback in the form of `function (err, truth)`. If error is
 * passed to `test` or `fn`, the main callback is immediately called with the
 * value of the error.
 *
 * @name during
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.whilst]{@link module:ControlFlow.whilst}
 * @category Control Flow
 * @param {AsyncFunction} test - asynchronous truth test to perform before each
 * execution of `fn`. Invoked with (callback).
 * @param {AsyncFunction} fn - An async function which is called each time
 * `test` passes. Invoked with (callback).
 * @param {Function} [callback] - A callback which is called after the test
 * function has failed and repeated execution of `fn` has stopped. `callback`
 * will be passed an error, if one occurred, otherwise `null`.
 * @example
 *
 * var count = 0;
 *
 * async.during(
 *     function (callback) {
 *         return callback(null, count < 5);
 *     },
 *     function (callback) {
 *         count++;
 *         setTimeout(callback, 1000);
 *     },
 *     function (err) {
 *         // 5 seconds have passed
 *     }
 * );
 */
function during(test, fn, callback) {
    callback = onlyOnce(callback || noop);
    var _fn = wrapAsync(fn);
    var _test = wrapAsync(test);

    function next(err) {
        if (err) return callback(err);
        _test(check);
    }

    function check(err, truth) {
        if (err) return callback(err);
        if (!truth) return callback(null);
        _fn(next);
    }

    _test(check);
}

function _withoutIndex(iteratee) {
    return function (value, index, callback) {
        return iteratee(value, callback);
    };
}

/**
 * Applies the function `iteratee` to each item in `coll`, in parallel.
 * The `iteratee` is called with an item from the list, and a callback for when
 * it has finished. If the `iteratee` passes an error to its `callback`, the
 * main `callback` (for the `each` function) is immediately called with the
 * error.
 *
 * Note, that since this function applies `iteratee` to each item in parallel,
 * there is no guarantee that the iteratee functions will complete in order.
 *
 * @name each
 * @static
 * @memberOf module:Collections
 * @method
 * @alias forEach
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to
 * each item in `coll`. Invoked with (item, callback).
 * The array index is not passed to the iteratee.
 * If you need the index, use `eachOf`.
 * @param {Function} [callback] - A callback which is called when all
 * `iteratee` functions have finished, or an error occurs. Invoked with (err).
 * @example
 *
 * // assuming openFiles is an array of file names and saveFile is a function
 * // to save the modified contents of that file:
 *
 * async.each(openFiles, saveFile, function(err){
 *   // if any of the saves produced an error, err would equal that error
 * });
 *
 * // assuming openFiles is an array of file names
 * async.each(openFiles, function(file, callback) {
 *
 *     // Perform operation on file here.
 *     console.log('Processing file ' + file);
 *
 *     if( file.length > 32 ) {
 *       console.log('This file name is too long');
 *       callback('File name too long');
 *     } else {
 *       // Do work to process file here
 *       console.log('File processed');
 *       callback();
 *     }
 * }, function(err) {
 *     // if any of the file processing produced an error, err would equal that error
 *     if( err ) {
 *       // One of the iterations produced an error.
 *       // All processing will now stop.
 *       console.log('A file failed to process');
 *     } else {
 *       console.log('All files have been processed successfully');
 *     }
 * });
 */
function eachLimit(coll, iteratee, callback) {
    eachOf(coll, _withoutIndex(wrapAsync(iteratee)), callback);
}

/**
 * The same as [`each`]{@link module:Collections.each} but runs a maximum of `limit` async operations at a time.
 *
 * @name eachLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.each]{@link module:Collections.each}
 * @alias forEachLimit
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The array index is not passed to the iteratee.
 * If you need the index, use `eachOfLimit`.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called when all
 * `iteratee` functions have finished, or an error occurs. Invoked with (err).
 */
function eachLimit$1(coll, limit, iteratee, callback) {
    _eachOfLimit(limit)(coll, _withoutIndex(wrapAsync(iteratee)), callback);
}

/**
 * The same as [`each`]{@link module:Collections.each} but runs only a single async operation at a time.
 *
 * @name eachSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.each]{@link module:Collections.each}
 * @alias forEachSeries
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to each
 * item in `coll`.
 * The array index is not passed to the iteratee.
 * If you need the index, use `eachOfSeries`.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called when all
 * `iteratee` functions have finished, or an error occurs. Invoked with (err).
 */
var eachSeries = doLimit(eachLimit$1, 1);

/**
 * Wrap an async function and ensure it calls its callback on a later tick of
 * the event loop.  If the function already calls its callback on a next tick,
 * no extra deferral is added. This is useful for preventing stack overflows
 * (`RangeError: Maximum call stack size exceeded`) and generally keeping
 * [Zalgo](http://blog.izs.me/post/59142742143/designing-apis-for-asynchrony)
 * contained. ES2017 `async` functions are returned as-is -- they are immune
 * to Zalgo's corrupting influences, as they always resolve on a later tick.
 *
 * @name ensureAsync
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {AsyncFunction} fn - an async function, one that expects a node-style
 * callback as its last argument.
 * @returns {AsyncFunction} Returns a wrapped function with the exact same call
 * signature as the function passed in.
 * @example
 *
 * function sometimesAsync(arg, callback) {
 *     if (cache[arg]) {
 *         return callback(null, cache[arg]); // this would be synchronous!!
 *     } else {
 *         doSomeIO(arg, callback); // this IO would be asynchronous
 *     }
 * }
 *
 * // this has a risk of stack overflows if many results are cached in a row
 * async.mapSeries(args, sometimesAsync, done);
 *
 * // this will defer sometimesAsync's callback if necessary,
 * // preventing stack overflows
 * async.mapSeries(args, async.ensureAsync(sometimesAsync), done);
 */
function ensureAsync(fn) {
    if (isAsync(fn)) return fn;
    return initialParams(function (args, callback) {
        var sync = true;
        args.push(function () {
            var innerArgs = arguments;
            if (sync) {
                setImmediate$1(function () {
                    callback.apply(null, innerArgs);
                });
            } else {
                callback.apply(null, innerArgs);
            }
        });
        fn.apply(this, args);
        sync = false;
    });
}

function notId(v) {
    return !v;
}

/**
 * Returns `true` if every element in `coll` satisfies an async test. If any
 * iteratee call returns `false`, the main `callback` is immediately called.
 *
 * @name every
 * @static
 * @memberOf module:Collections
 * @method
 * @alias all
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async truth test to apply to each item
 * in the collection in parallel.
 * The iteratee must complete with a boolean result value.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Result will be either `true` or `false`
 * depending on the values of the async tests. Invoked with (err, result).
 * @example
 *
 * async.every(['file1','file2','file3'], function(filePath, callback) {
 *     fs.access(filePath, function(err) {
 *         callback(null, !err)
 *     });
 * }, function(err, result) {
 *     // if result is true then every file exists
 * });
 */
var every = doParallel(_createTester(notId, notId));

/**
 * The same as [`every`]{@link module:Collections.every} but runs a maximum of `limit` async operations at a time.
 *
 * @name everyLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.every]{@link module:Collections.every}
 * @alias allLimit
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - An async truth test to apply to each item
 * in the collection in parallel.
 * The iteratee must complete with a boolean result value.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Result will be either `true` or `false`
 * depending on the values of the async tests. Invoked with (err, result).
 */
var everyLimit = doParallelLimit(_createTester(notId, notId));

/**
 * The same as [`every`]{@link module:Collections.every} but runs only a single async operation at a time.
 *
 * @name everySeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.every]{@link module:Collections.every}
 * @alias allSeries
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async truth test to apply to each item
 * in the collection in series.
 * The iteratee must complete with a boolean result value.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Result will be either `true` or `false`
 * depending on the values of the async tests. Invoked with (err, result).
 */
var everySeries = doLimit(everyLimit, 1);

/**
 * The base implementation of `_.property` without support for deep paths.
 *
 * @private
 * @param {string} key The key of the property to get.
 * @returns {Function} Returns the new accessor function.
 */
function baseProperty(key) {
  return function(object) {
    return object == null ? undefined : object[key];
  };
}

function filterArray(eachfn, arr, iteratee, callback) {
    var truthValues = new Array(arr.length);
    eachfn(arr, function (x, index, callback) {
        iteratee(x, function (err, v) {
            truthValues[index] = !!v;
            callback(err);
        });
    }, function (err) {
        if (err) return callback(err);
        var results = [];
        for (var i = 0; i < arr.length; i++) {
            if (truthValues[i]) results.push(arr[i]);
        }
        callback(null, results);
    });
}

function filterGeneric(eachfn, coll, iteratee, callback) {
    var results = [];
    eachfn(coll, function (x, index, callback) {
        iteratee(x, function (err, v) {
            if (err) {
                callback(err);
            } else {
                if (v) {
                    results.push({index: index, value: x});
                }
                callback();
            }
        });
    }, function (err) {
        if (err) {
            callback(err);
        } else {
            callback(null, arrayMap(results.sort(function (a, b) {
                return a.index - b.index;
            }), baseProperty('value')));
        }
    });
}

function _filter(eachfn, coll, iteratee, callback) {
    var filter = isArrayLike(coll) ? filterArray : filterGeneric;
    filter(eachfn, coll, wrapAsync(iteratee), callback || noop);
}

/**
 * Returns a new array of all the values in `coll` which pass an async truth
 * test. This operation is performed in parallel, but the results array will be
 * in the same order as the original.
 *
 * @name filter
 * @static
 * @memberOf module:Collections
 * @method
 * @alias select
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {Function} iteratee - A truth test to apply to each item in `coll`.
 * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
 * with a boolean argument once it has completed. Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Invoked with (err, results).
 * @example
 *
 * async.filter(['file1','file2','file3'], function(filePath, callback) {
 *     fs.access(filePath, function(err) {
 *         callback(null, !err)
 *     });
 * }, function(err, results) {
 *     // results now equals an array of the existing files
 * });
 */
var filter = doParallel(_filter);

/**
 * The same as [`filter`]{@link module:Collections.filter} but runs a maximum of `limit` async operations at a
 * time.
 *
 * @name filterLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.filter]{@link module:Collections.filter}
 * @alias selectLimit
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {Function} iteratee - A truth test to apply to each item in `coll`.
 * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
 * with a boolean argument once it has completed. Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Invoked with (err, results).
 */
var filterLimit = doParallelLimit(_filter);

/**
 * The same as [`filter`]{@link module:Collections.filter} but runs only a single async operation at a time.
 *
 * @name filterSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.filter]{@link module:Collections.filter}
 * @alias selectSeries
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {Function} iteratee - A truth test to apply to each item in `coll`.
 * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
 * with a boolean argument once it has completed. Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Invoked with (err, results)
 */
var filterSeries = doLimit(filterLimit, 1);

/**
 * Calls the asynchronous function `fn` with a callback parameter that allows it
 * to call itself again, in series, indefinitely.

 * If an error is passed to the callback then `errback` is called with the
 * error, and execution stops, otherwise it will never be called.
 *
 * @name forever
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {AsyncFunction} fn - an async function to call repeatedly.
 * Invoked with (next).
 * @param {Function} [errback] - when `fn` passes an error to it's callback,
 * this function will be called, and execution stops. Invoked with (err).
 * @example
 *
 * async.forever(
 *     function(next) {
 *         // next is suitable for passing to things that need a callback(err [, whatever]);
 *         // it will result in this function being called again.
 *     },
 *     function(err) {
 *         // if next is called with a value in its first parameter, it will appear
 *         // in here as 'err', and execution will stop.
 *     }
 * );
 */
function forever(fn, errback) {
    var done = onlyOnce(errback || noop);
    var task = wrapAsync(ensureAsync(fn));

    function next(err) {
        if (err) return done(err);
        task(next);
    }
    next();
}

/**
 * The same as [`groupBy`]{@link module:Collections.groupBy} but runs a maximum of `limit` async operations at a time.
 *
 * @name groupByLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.groupBy]{@link module:Collections.groupBy}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The iteratee should complete with a `key` to group the value under.
 * Invoked with (value, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. Result is an `Object` whoses
 * properties are arrays of values which returned the corresponding key.
 */
var groupByLimit = function(coll, limit, iteratee, callback) {
    callback = callback || noop;
    var _iteratee = wrapAsync(iteratee);
    mapLimit(coll, limit, function(val, callback) {
        _iteratee(val, function(err, key) {
            if (err) return callback(err);
            return callback(null, {key: key, val: val});
        });
    }, function(err, mapResults) {
        var result = {};
        // from MDN, handle object having an `hasOwnProperty` prop
        var hasOwnProperty = Object.prototype.hasOwnProperty;

        for (var i = 0; i < mapResults.length; i++) {
            if (mapResults[i]) {
                var key = mapResults[i].key;
                var val = mapResults[i].val;

                if (hasOwnProperty.call(result, key)) {
                    result[key].push(val);
                } else {
                    result[key] = [val];
                }
            }
        }

        return callback(err, result);
    });
};

/**
 * Returns a new object, where each value corresponds to an array of items, from
 * `coll`, that returned the corresponding key. That is, the keys of the object
 * correspond to the values passed to the `iteratee` callback.
 *
 * Note: Since this function applies the `iteratee` to each item in parallel,
 * there is no guarantee that the `iteratee` functions will complete in order.
 * However, the values for each key in the `result` will be in the same order as
 * the original `coll`. For Objects, the values will roughly be in the order of
 * the original Objects' keys (but this can vary across JavaScript engines).
 *
 * @name groupBy
 * @static
 * @memberOf module:Collections
 * @method
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The iteratee should complete with a `key` to group the value under.
 * Invoked with (value, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. Result is an `Object` whoses
 * properties are arrays of values which returned the corresponding key.
 * @example
 *
 * async.groupBy(['userId1', 'userId2', 'userId3'], function(userId, callback) {
 *     db.findById(userId, function(err, user) {
 *         if (err) return callback(err);
 *         return callback(null, user.age);
 *     });
 * }, function(err, result) {
 *     // result is object containing the userIds grouped by age
 *     // e.g. { 30: ['userId1', 'userId3'], 42: ['userId2']};
 * });
 */
var groupBy = doLimit(groupByLimit, Infinity);

/**
 * The same as [`groupBy`]{@link module:Collections.groupBy} but runs only a single async operation at a time.
 *
 * @name groupBySeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.groupBy]{@link module:Collections.groupBy}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The iteratee should complete with a `key` to group the value under.
 * Invoked with (value, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. Result is an `Object` whoses
 * properties are arrays of values which returned the corresponding key.
 */
var groupBySeries = doLimit(groupByLimit, 1);

/**
 * Logs the result of an `async` function to the `console`. Only works in
 * Node.js or in browsers that support `console.log` and `console.error` (such
 * as FF and Chrome). If multiple arguments are returned from the async
 * function, `console.log` is called on each argument in order.
 *
 * @name log
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {AsyncFunction} function - The function you want to eventually apply
 * all arguments to.
 * @param {...*} arguments... - Any number of arguments to apply to the function.
 * @example
 *
 * // in a module
 * var hello = function(name, callback) {
 *     setTimeout(function() {
 *         callback(null, 'hello ' + name);
 *     }, 1000);
 * };
 *
 * // in the node repl
 * node> async.log(hello, 'world');
 * 'hello world'
 */
var log = consoleFunc('log');

/**
 * The same as [`mapValues`]{@link module:Collections.mapValues} but runs a maximum of `limit` async operations at a
 * time.
 *
 * @name mapValuesLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.mapValues]{@link module:Collections.mapValues}
 * @category Collection
 * @param {Object} obj - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - A function to apply to each value and key
 * in `coll`.
 * The iteratee should complete with the transformed value as its result.
 * Invoked with (value, key, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. `result` is a new object consisting
 * of each key from `obj`, with each transformed value on the right-hand side.
 * Invoked with (err, result).
 */
function mapValuesLimit(obj, limit, iteratee, callback) {
    callback = once(callback || noop);
    var newObj = {};
    var _iteratee = wrapAsync(iteratee);
    eachOfLimit(obj, limit, function(val, key, next) {
        _iteratee(val, key, function (err, result) {
            if (err) return next(err);
            newObj[key] = result;
            next();
        });
    }, function (err) {
        callback(err, newObj);
    });
}

/**
 * A relative of [`map`]{@link module:Collections.map}, designed for use with objects.
 *
 * Produces a new Object by mapping each value of `obj` through the `iteratee`
 * function. The `iteratee` is called each `value` and `key` from `obj` and a
 * callback for when it has finished processing. Each of these callbacks takes
 * two arguments: an `error`, and the transformed item from `obj`. If `iteratee`
 * passes an error to its callback, the main `callback` (for the `mapValues`
 * function) is immediately called with the error.
 *
 * Note, the order of the keys in the result is not guaranteed.  The keys will
 * be roughly in the order they complete, (but this is very engine-specific)
 *
 * @name mapValues
 * @static
 * @memberOf module:Collections
 * @method
 * @category Collection
 * @param {Object} obj - A collection to iterate over.
 * @param {AsyncFunction} iteratee - A function to apply to each value and key
 * in `coll`.
 * The iteratee should complete with the transformed value as its result.
 * Invoked with (value, key, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. `result` is a new object consisting
 * of each key from `obj`, with each transformed value on the right-hand side.
 * Invoked with (err, result).
 * @example
 *
 * async.mapValues({
 *     f1: 'file1',
 *     f2: 'file2',
 *     f3: 'file3'
 * }, function (file, key, callback) {
 *   fs.stat(file, callback);
 * }, function(err, result) {
 *     // result is now a map of stats for each file, e.g.
 *     // {
 *     //     f1: [stats for file1],
 *     //     f2: [stats for file2],
 *     //     f3: [stats for file3]
 *     // }
 * });
 */

var mapValues = doLimit(mapValuesLimit, Infinity);

/**
 * The same as [`mapValues`]{@link module:Collections.mapValues} but runs only a single async operation at a time.
 *
 * @name mapValuesSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.mapValues]{@link module:Collections.mapValues}
 * @category Collection
 * @param {Object} obj - A collection to iterate over.
 * @param {AsyncFunction} iteratee - A function to apply to each value and key
 * in `coll`.
 * The iteratee should complete with the transformed value as its result.
 * Invoked with (value, key, callback).
 * @param {Function} [callback] - A callback which is called when all `iteratee`
 * functions have finished, or an error occurs. `result` is a new object consisting
 * of each key from `obj`, with each transformed value on the right-hand side.
 * Invoked with (err, result).
 */
var mapValuesSeries = doLimit(mapValuesLimit, 1);

function has(obj, key) {
    return key in obj;
}

/**
 * Caches the results of an async function. When creating a hash to store
 * function results against, the callback is omitted from the hash and an
 * optional hash function can be used.
 *
 * If no hash function is specified, the first argument is used as a hash key,
 * which may work reasonably if it is a string or a data type that converts to a
 * distinct string. Note that objects and arrays will not behave reasonably.
 * Neither will cases where the other arguments are significant. In such cases,
 * specify your own hash function.
 *
 * The cache of results is exposed as the `memo` property of the function
 * returned by `memoize`.
 *
 * @name memoize
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {AsyncFunction} fn - The async function to proxy and cache results from.
 * @param {Function} hasher - An optional function for generating a custom hash
 * for storing results. It has all the arguments applied to it apart from the
 * callback, and must be synchronous.
 * @returns {AsyncFunction} a memoized version of `fn`
 * @example
 *
 * var slow_fn = function(name, callback) {
 *     // do something
 *     callback(null, result);
 * };
 * var fn = async.memoize(slow_fn);
 *
 * // fn can now be used as if it were slow_fn
 * fn('some name', function() {
 *     // callback
 * });
 */
function memoize(fn, hasher) {
    var memo = Object.create(null);
    var queues = Object.create(null);
    hasher = hasher || identity;
    var _fn = wrapAsync(fn);
    var memoized = initialParams(function memoized(args, callback) {
        var key = hasher.apply(null, args);
        if (has(memo, key)) {
            setImmediate$1(function() {
                callback.apply(null, memo[key]);
            });
        } else if (has(queues, key)) {
            queues[key].push(callback);
        } else {
            queues[key] = [callback];
            _fn.apply(null, args.concat(function(/*args*/) {
                var args = slice(arguments);
                memo[key] = args;
                var q = queues[key];
                delete queues[key];
                for (var i = 0, l = q.length; i < l; i++) {
                    q[i].apply(null, args);
                }
            }));
        }
    });
    memoized.memo = memo;
    memoized.unmemoized = fn;
    return memoized;
}

/**
 * Calls `callback` on a later loop around the event loop. In Node.js this just
 * calls `process.nextTicl`.  In the browser it will use `setImmediate` if
 * available, otherwise `setTimeout(callback, 0)`, which means other higher
 * priority events may precede the execution of `callback`.
 *
 * This is used internally for browser-compatibility purposes.
 *
 * @name nextTick
 * @static
 * @memberOf module:Utils
 * @method
 * @see [async.setImmediate]{@link module:Utils.setImmediate}
 * @category Util
 * @param {Function} callback - The function to call on a later loop around
 * the event loop. Invoked with (args...).
 * @param {...*} args... - any number of additional arguments to pass to the
 * callback on the next tick.
 * @example
 *
 * var call_order = [];
 * async.nextTick(function() {
 *     call_order.push('two');
 *     // call_order now equals ['one','two']
 * });
 * call_order.push('one');
 *
 * async.setImmediate(function (a, b, c) {
 *     // a, b, and c equal 1, 2, and 3
 * }, 1, 2, 3);
 */
var _defer$1;

if (hasNextTick) {
    _defer$1 = process.nextTick;
} else if (hasSetImmediate) {
    _defer$1 = setImmediate;
} else {
    _defer$1 = fallback;
}

var nextTick = wrap(_defer$1);

function _parallel(eachfn, tasks, callback) {
    callback = callback || noop;
    var results = isArrayLike(tasks) ? [] : {};

    eachfn(tasks, function (task, key, callback) {
        wrapAsync(task)(function (err, result) {
            if (arguments.length > 2) {
                result = slice(arguments, 1);
            }
            results[key] = result;
            callback(err);
        });
    }, function (err) {
        callback(err, results);
    });
}

/**
 * Run the `tasks` collection of functions in parallel, without waiting until
 * the previous function has completed. If any of the functions pass an error to
 * its callback, the main `callback` is immediately called with the value of the
 * error. Once the `tasks` have completed, the results are passed to the final
 * `callback` as an array.
 *
 * **Note:** `parallel` is about kicking-off I/O tasks in parallel, not about
 * parallel execution of code.  If your tasks do not use any timers or perform
 * any I/O, they will actually be executed in series.  Any synchronous setup
 * sections for each task will happen one after the other.  JavaScript remains
 * single-threaded.
 *
 * **Hint:** Use [`reflect`]{@link module:Utils.reflect} to continue the
 * execution of other tasks when a task fails.
 *
 * It is also possible to use an object instead of an array. Each property will
 * be run as a function and the results will be passed to the final `callback`
 * as an object instead of an array. This can be a more readable way of handling
 * results from {@link async.parallel}.
 *
 * @name parallel
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Array|Iterable|Object} tasks - A collection of
 * [async functions]{@link AsyncFunction} to run.
 * Each async function can complete with any number of optional `result` values.
 * @param {Function} [callback] - An optional callback to run once all the
 * functions have completed successfully. This function gets a results array
 * (or object) containing all the result arguments passed to the task callbacks.
 * Invoked with (err, results).
 *
 * @example
 * async.parallel([
 *     function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'one');
 *         }, 200);
 *     },
 *     function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'two');
 *         }, 100);
 *     }
 * ],
 * // optional callback
 * function(err, results) {
 *     // the results array will equal ['one','two'] even though
 *     // the second function had a shorter timeout.
 * });
 *
 * // an example using an object instead of an array
 * async.parallel({
 *     one: function(callback) {
 *         setTimeout(function() {
 *             callback(null, 1);
 *         }, 200);
 *     },
 *     two: function(callback) {
 *         setTimeout(function() {
 *             callback(null, 2);
 *         }, 100);
 *     }
 * }, function(err, results) {
 *     // results is now equals to: {one: 1, two: 2}
 * });
 */
function parallelLimit(tasks, callback) {
    _parallel(eachOf, tasks, callback);
}

/**
 * The same as [`parallel`]{@link module:ControlFlow.parallel} but runs a maximum of `limit` async operations at a
 * time.
 *
 * @name parallelLimit
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.parallel]{@link module:ControlFlow.parallel}
 * @category Control Flow
 * @param {Array|Iterable|Object} tasks - A collection of
 * [async functions]{@link AsyncFunction} to run.
 * Each async function can complete with any number of optional `result` values.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {Function} [callback] - An optional callback to run once all the
 * functions have completed successfully. This function gets a results array
 * (or object) containing all the result arguments passed to the task callbacks.
 * Invoked with (err, results).
 */
function parallelLimit$1(tasks, limit, callback) {
    _parallel(_eachOfLimit(limit), tasks, callback);
}

/**
 * A queue of tasks for the worker function to complete.
 * @typedef {Object} QueueObject
 * @memberOf module:ControlFlow
 * @property {Function} length - a function returning the number of items
 * waiting to be processed. Invoke with `queue.length()`.
 * @property {boolean} started - a boolean indicating whether or not any
 * items have been pushed and processed by the queue.
 * @property {Function} running - a function returning the number of items
 * currently being processed. Invoke with `queue.running()`.
 * @property {Function} workersList - a function returning the array of items
 * currently being processed. Invoke with `queue.workersList()`.
 * @property {Function} idle - a function returning false if there are items
 * waiting or being processed, or true if not. Invoke with `queue.idle()`.
 * @property {number} concurrency - an integer for determining how many `worker`
 * functions should be run in parallel. This property can be changed after a
 * `queue` is created to alter the concurrency on-the-fly.
 * @property {Function} push - add a new task to the `queue`. Calls `callback`
 * once the `worker` has finished processing the task. Instead of a single task,
 * a `tasks` array can be submitted. The respective callback is used for every
 * task in the list. Invoke with `queue.push(task, [callback])`,
 * @property {Function} unshift - add a new task to the front of the `queue`.
 * Invoke with `queue.unshift(task, [callback])`.
 * @property {Function} remove - remove items from the queue that match a test
 * function.  The test function will be passed an object with a `data` property,
 * and a `priority` property, if this is a
 * [priorityQueue]{@link module:ControlFlow.priorityQueue} object.
 * Invoked with `queue.remove(testFn)`, where `testFn` is of the form
 * `function ({data, priority}) {}` and returns a Boolean.
 * @property {Function} saturated - a callback that is called when the number of
 * running workers hits the `concurrency` limit, and further tasks will be
 * queued.
 * @property {Function} unsaturated - a callback that is called when the number
 * of running workers is less than the `concurrency` & `buffer` limits, and
 * further tasks will not be queued.
 * @property {number} buffer - A minimum threshold buffer in order to say that
 * the `queue` is `unsaturated`.
 * @property {Function} empty - a callback that is called when the last item
 * from the `queue` is given to a `worker`.
 * @property {Function} drain - a callback that is called when the last item
 * from the `queue` has returned from the `worker`.
 * @property {Function} error - a callback that is called when a task errors.
 * Has the signature `function(error, task)`.
 * @property {boolean} paused - a boolean for determining whether the queue is
 * in a paused state.
 * @property {Function} pause - a function that pauses the processing of tasks
 * until `resume()` is called. Invoke with `queue.pause()`.
 * @property {Function} resume - a function that resumes the processing of
 * queued tasks when the queue is paused. Invoke with `queue.resume()`.
 * @property {Function} kill - a function that removes the `drain` callback and
 * empties remaining tasks from the queue forcing it to go idle. No more tasks
 * should be pushed to the queue after calling this function. Invoke with `queue.kill()`.
 */

/**
 * Creates a `queue` object with the specified `concurrency`. Tasks added to the
 * `queue` are processed in parallel (up to the `concurrency` limit). If all
 * `worker`s are in progress, the task is queued until one becomes available.
 * Once a `worker` completes a `task`, that `task`'s callback is called.
 *
 * @name queue
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {AsyncFunction} worker - An async function for processing a queued task.
 * If you want to handle errors from an individual task, pass a callback to
 * `q.push()`. Invoked with (task, callback).
 * @param {number} [concurrency=1] - An `integer` for determining how many
 * `worker` functions should be run in parallel.  If omitted, the concurrency
 * defaults to `1`.  If the concurrency is `0`, an error is thrown.
 * @returns {module:ControlFlow.QueueObject} A queue object to manage the tasks. Callbacks can
 * attached as certain properties to listen for specific events during the
 * lifecycle of the queue.
 * @example
 *
 * // create a queue object with concurrency 2
 * var q = async.queue(function(task, callback) {
 *     console.log('hello ' + task.name);
 *     callback();
 * }, 2);
 *
 * // assign a callback
 * q.drain = function() {
 *     console.log('all items have been processed');
 * };
 *
 * // add some items to the queue
 * q.push({name: 'foo'}, function(err) {
 *     console.log('finished processing foo');
 * });
 * q.push({name: 'bar'}, function (err) {
 *     console.log('finished processing bar');
 * });
 *
 * // add some items to the queue (batch-wise)
 * q.push([{name: 'baz'},{name: 'bay'},{name: 'bax'}], function(err) {
 *     console.log('finished processing item');
 * });
 *
 * // add some items to the front of the queue
 * q.unshift({name: 'bar'}, function (err) {
 *     console.log('finished processing bar');
 * });
 */
var queue$1 = function (worker, concurrency) {
    var _worker = wrapAsync(worker);
    return queue(function (items, cb) {
        _worker(items[0], cb);
    }, concurrency, 1);
};

/**
 * The same as [async.queue]{@link module:ControlFlow.queue} only tasks are assigned a priority and
 * completed in ascending priority order.
 *
 * @name priorityQueue
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.queue]{@link module:ControlFlow.queue}
 * @category Control Flow
 * @param {AsyncFunction} worker - An async function for processing a queued task.
 * If you want to handle errors from an individual task, pass a callback to
 * `q.push()`.
 * Invoked with (task, callback).
 * @param {number} concurrency - An `integer` for determining how many `worker`
 * functions should be run in parallel.  If omitted, the concurrency defaults to
 * `1`.  If the concurrency is `0`, an error is thrown.
 * @returns {module:ControlFlow.QueueObject} A priorityQueue object to manage the tasks. There are two
 * differences between `queue` and `priorityQueue` objects:
 * * `push(task, priority, [callback])` - `priority` should be a number. If an
 *   array of `tasks` is given, all tasks will be assigned the same priority.
 * * The `unshift` method was removed.
 */
var priorityQueue = function(worker, concurrency) {
    // Start with a normal queue
    var q = queue$1(worker, concurrency);

    // Override push to accept second parameter representing priority
    q.push = function(data, priority, callback) {
        if (callback == null) callback = noop;
        if (typeof callback !== 'function') {
            throw new Error('task callback must be a function');
        }
        q.started = true;
        if (!isArray(data)) {
            data = [data];
        }
        if (data.length === 0) {
            // call drain immediately if there are no tasks
            return setImmediate$1(function() {
                q.drain();
            });
        }

        priority = priority || 0;
        var nextNode = q._tasks.head;
        while (nextNode && priority >= nextNode.priority) {
            nextNode = nextNode.next;
        }

        for (var i = 0, l = data.length; i < l; i++) {
            var item = {
                data: data[i],
                priority: priority,
                callback: callback
            };

            if (nextNode) {
                q._tasks.insertBefore(nextNode, item);
            } else {
                q._tasks.push(item);
            }
        }
        setImmediate$1(q.process);
    };

    // Remove unshift function
    delete q.unshift;

    return q;
};

/**
 * Runs the `tasks` array of functions in parallel, without waiting until the
 * previous function has completed. Once any of the `tasks` complete or pass an
 * error to its callback, the main `callback` is immediately called. It's
 * equivalent to `Promise.race()`.
 *
 * @name race
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Array} tasks - An array containing [async functions]{@link AsyncFunction}
 * to run. Each function can complete with an optional `result` value.
 * @param {Function} callback - A callback to run once any of the functions have
 * completed. This function gets an error or result from the first function that
 * completed. Invoked with (err, result).
 * @returns undefined
 * @example
 *
 * async.race([
 *     function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'one');
 *         }, 200);
 *     },
 *     function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'two');
 *         }, 100);
 *     }
 * ],
 * // main callback
 * function(err, result) {
 *     // the result will be equal to 'two' as it finishes earlier
 * });
 */
function race(tasks, callback) {
    callback = once(callback || noop);
    if (!isArray(tasks)) return callback(new TypeError('First argument to race must be an array of functions'));
    if (!tasks.length) return callback();
    for (var i = 0, l = tasks.length; i < l; i++) {
        wrapAsync(tasks[i])(callback);
    }
}

/**
 * Same as [`reduce`]{@link module:Collections.reduce}, only operates on `array` in reverse order.
 *
 * @name reduceRight
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.reduce]{@link module:Collections.reduce}
 * @alias foldr
 * @category Collection
 * @param {Array} array - A collection to iterate over.
 * @param {*} memo - The initial state of the reduction.
 * @param {AsyncFunction} iteratee - A function applied to each item in the
 * array to produce the next step in the reduction.
 * The `iteratee` should complete with the next state of the reduction.
 * If the iteratee complete with an error, the reduction is stopped and the
 * main `callback` is immediately called with the error.
 * Invoked with (memo, item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Result is the reduced value. Invoked with
 * (err, result).
 */
function reduceRight (array, memo, iteratee, callback) {
    var reversed = slice(array).reverse();
    reduce(reversed, memo, iteratee, callback);
}

/**
 * Wraps the async function in another function that always completes with a
 * result object, even when it errors.
 *
 * The result object has either the property `error` or `value`.
 *
 * @name reflect
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {AsyncFunction} fn - The async function you want to wrap
 * @returns {Function} - A function that always passes null to it's callback as
 * the error. The second argument to the callback will be an `object` with
 * either an `error` or a `value` property.
 * @example
 *
 * async.parallel([
 *     async.reflect(function(callback) {
 *         // do some stuff ...
 *         callback(null, 'one');
 *     }),
 *     async.reflect(function(callback) {
 *         // do some more stuff but error ...
 *         callback('bad stuff happened');
 *     }),
 *     async.reflect(function(callback) {
 *         // do some more stuff ...
 *         callback(null, 'two');
 *     })
 * ],
 * // optional callback
 * function(err, results) {
 *     // values
 *     // results[0].value = 'one'
 *     // results[1].error = 'bad stuff happened'
 *     // results[2].value = 'two'
 * });
 */
function reflect(fn) {
    var _fn = wrapAsync(fn);
    return initialParams(function reflectOn(args, reflectCallback) {
        args.push(function callback(error, cbArg) {
            if (error) {
                reflectCallback(null, { error: error });
            } else {
                var value;
                if (arguments.length <= 2) {
                    value = cbArg;
                } else {
                    value = slice(arguments, 1);
                }
                reflectCallback(null, { value: value });
            }
        });

        return _fn.apply(this, args);
    });
}

/**
 * A helper function that wraps an array or an object of functions with `reflect`.
 *
 * @name reflectAll
 * @static
 * @memberOf module:Utils
 * @method
 * @see [async.reflect]{@link module:Utils.reflect}
 * @category Util
 * @param {Array|Object|Iterable} tasks - The collection of
 * [async functions]{@link AsyncFunction} to wrap in `async.reflect`.
 * @returns {Array} Returns an array of async functions, each wrapped in
 * `async.reflect`
 * @example
 *
 * let tasks = [
 *     function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'one');
 *         }, 200);
 *     },
 *     function(callback) {
 *         // do some more stuff but error ...
 *         callback(new Error('bad stuff happened'));
 *     },
 *     function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'two');
 *         }, 100);
 *     }
 * ];
 *
 * async.parallel(async.reflectAll(tasks),
 * // optional callback
 * function(err, results) {
 *     // values
 *     // results[0].value = 'one'
 *     // results[1].error = Error('bad stuff happened')
 *     // results[2].value = 'two'
 * });
 *
 * // an example using an object instead of an array
 * let tasks = {
 *     one: function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'one');
 *         }, 200);
 *     },
 *     two: function(callback) {
 *         callback('two');
 *     },
 *     three: function(callback) {
 *         setTimeout(function() {
 *             callback(null, 'three');
 *         }, 100);
 *     }
 * };
 *
 * async.parallel(async.reflectAll(tasks),
 * // optional callback
 * function(err, results) {
 *     // values
 *     // results.one.value = 'one'
 *     // results.two.error = 'two'
 *     // results.three.value = 'three'
 * });
 */
function reflectAll(tasks) {
    var results;
    if (isArray(tasks)) {
        results = arrayMap(tasks, reflect);
    } else {
        results = {};
        baseForOwn(tasks, function(task, key) {
            results[key] = reflect.call(this, task);
        });
    }
    return results;
}

function reject$1(eachfn, arr, iteratee, callback) {
    _filter(eachfn, arr, function(value, cb) {
        iteratee(value, function(err, v) {
            cb(err, !v);
        });
    }, callback);
}

/**
 * The opposite of [`filter`]{@link module:Collections.filter}. Removes values that pass an `async` truth test.
 *
 * @name reject
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.filter]{@link module:Collections.filter}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {Function} iteratee - An async truth test to apply to each item in
 * `coll`.
 * The should complete with a boolean value as its `result`.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Invoked with (err, results).
 * @example
 *
 * async.reject(['file1','file2','file3'], function(filePath, callback) {
 *     fs.access(filePath, function(err) {
 *         callback(null, !err)
 *     });
 * }, function(err, results) {
 *     // results now equals an array of missing files
 *     createFiles(results);
 * });
 */
var reject = doParallel(reject$1);

/**
 * The same as [`reject`]{@link module:Collections.reject} but runs a maximum of `limit` async operations at a
 * time.
 *
 * @name rejectLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.reject]{@link module:Collections.reject}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {Function} iteratee - An async truth test to apply to each item in
 * `coll`.
 * The should complete with a boolean value as its `result`.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Invoked with (err, results).
 */
var rejectLimit = doParallelLimit(reject$1);

/**
 * The same as [`reject`]{@link module:Collections.reject} but runs only a single async operation at a time.
 *
 * @name rejectSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.reject]{@link module:Collections.reject}
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {Function} iteratee - An async truth test to apply to each item in
 * `coll`.
 * The should complete with a boolean value as its `result`.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Invoked with (err, results).
 */
var rejectSeries = doLimit(rejectLimit, 1);

/**
 * Creates a function that returns `value`.
 *
 * @static
 * @memberOf _
 * @since 2.4.0
 * @category Util
 * @param {*} value The value to return from the new function.
 * @returns {Function} Returns the new constant function.
 * @example
 *
 * var objects = _.times(2, _.constant({ 'a': 1 }));
 *
 * console.log(objects);
 * // => [{ 'a': 1 }, { 'a': 1 }]
 *
 * console.log(objects[0] === objects[1]);
 * // => true
 */
function constant$1(value) {
  return function() {
    return value;
  };
}

/**
 * Attempts to get a successful response from `task` no more than `times` times
 * before returning an error. If the task is successful, the `callback` will be
 * passed the result of the successful task. If all attempts fail, the callback
 * will be passed the error and result (if any) of the final attempt.
 *
 * @name retry
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @see [async.retryable]{@link module:ControlFlow.retryable}
 * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - Can be either an
 * object with `times` and `interval` or a number.
 * * `times` - The number of attempts to make before giving up.  The default
 *   is `5`.
 * * `interval` - The time to wait between retries, in milliseconds.  The
 *   default is `0`. The interval may also be specified as a function of the
 *   retry count (see example).
 * * `errorFilter` - An optional synchronous function that is invoked on
 *   erroneous result. If it returns `true` the retry attempts will continue;
 *   if the function returns `false` the retry flow is aborted with the current
 *   attempt's error and result being returned to the final callback.
 *   Invoked with (err).
 * * If `opts` is a number, the number specifies the number of times to retry,
 *   with the default interval of `0`.
 * @param {AsyncFunction} task - An async function to retry.
 * Invoked with (callback).
 * @param {Function} [callback] - An optional callback which is called when the
 * task has succeeded, or after the final failed attempt. It receives the `err`
 * and `result` arguments of the last attempt at completing the `task`. Invoked
 * with (err, results).
 *
 * @example
 *
 * // The `retry` function can be used as a stand-alone control flow by passing
 * // a callback, as shown below:
 *
 * // try calling apiMethod 3 times
 * async.retry(3, apiMethod, function(err, result) {
 *     // do something with the result
 * });
 *
 * // try calling apiMethod 3 times, waiting 200 ms between each retry
 * async.retry({times: 3, interval: 200}, apiMethod, function(err, result) {
 *     // do something with the result
 * });
 *
 * // try calling apiMethod 10 times with exponential backoff
 * // (i.e. intervals of 100, 200, 400, 800, 1600, ... milliseconds)
 * async.retry({
 *   times: 10,
 *   interval: function(retryCount) {
 *     return 50 * Math.pow(2, retryCount);
 *   }
 * }, apiMethod, function(err, result) {
 *     // do something with the result
 * });
 *
 * // try calling apiMethod the default 5 times no delay between each retry
 * async.retry(apiMethod, function(err, result) {
 *     // do something with the result
 * });
 *
 * // try calling apiMethod only when error condition satisfies, all other
 * // errors will abort the retry control flow and return to final callback
 * async.retry({
 *   errorFilter: function(err) {
 *     return err.message === 'Temporary error'; // only retry on a specific error
 *   }
 * }, apiMethod, function(err, result) {
 *     // do something with the result
 * });
 *
 * // to retry individual methods that are not as reliable within other
 * // control flow functions, use the `retryable` wrapper:
 * async.auto({
 *     users: api.getUsers.bind(api),
 *     payments: async.retryable(3, api.getPayments.bind(api))
 * }, function(err, results) {
 *     // do something with the results
 * });
 *
 */
function retry(opts, task, callback) {
    var DEFAULT_TIMES = 5;
    var DEFAULT_INTERVAL = 0;

    var options = {
        times: DEFAULT_TIMES,
        intervalFunc: constant$1(DEFAULT_INTERVAL)
    };

    function parseTimes(acc, t) {
        if (typeof t === 'object') {
            acc.times = +t.times || DEFAULT_TIMES;

            acc.intervalFunc = typeof t.interval === 'function' ?
                t.interval :
                constant$1(+t.interval || DEFAULT_INTERVAL);

            acc.errorFilter = t.errorFilter;
        } else if (typeof t === 'number' || typeof t === 'string') {
            acc.times = +t || DEFAULT_TIMES;
        } else {
            throw new Error("Invalid arguments for async.retry");
        }
    }

    if (arguments.length < 3 && typeof opts === 'function') {
        callback = task || noop;
        task = opts;
    } else {
        parseTimes(options, opts);
        callback = callback || noop;
    }

    if (typeof task !== 'function') {
        throw new Error("Invalid arguments for async.retry");
    }

    var _task = wrapAsync(task);

    var attempt = 1;
    function retryAttempt() {
        _task(function(err) {
            if (err && attempt++ < options.times &&
                (typeof options.errorFilter != 'function' ||
                    options.errorFilter(err))) {
                setTimeout(retryAttempt, options.intervalFunc(attempt));
            } else {
                callback.apply(null, arguments);
            }
        });
    }

    retryAttempt();
}

/**
 * A close relative of [`retry`]{@link module:ControlFlow.retry}.  This method
 * wraps a task and makes it retryable, rather than immediately calling it
 * with retries.
 *
 * @name retryable
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.retry]{@link module:ControlFlow.retry}
 * @category Control Flow
 * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - optional
 * options, exactly the same as from `retry`
 * @param {AsyncFunction} task - the asynchronous function to wrap.
 * This function will be passed any arguments passed to the returned wrapper.
 * Invoked with (...args, callback).
 * @returns {AsyncFunction} The wrapped function, which when invoked, will
 * retry on an error, based on the parameters specified in `opts`.
 * This function will accept the same parameters as `task`.
 * @example
 *
 * async.auto({
 *     dep1: async.retryable(3, getFromFlakyService),
 *     process: ["dep1", async.retryable(3, function (results, cb) {
 *         maybeProcessData(results.dep1, cb);
 *     })]
 * }, callback);
 */
var retryable = function (opts, task) {
    if (!task) {
        task = opts;
        opts = null;
    }
    var _task = wrapAsync(task);
    return initialParams(function (args, callback) {
        function taskFn(cb) {
            _task.apply(null, args.concat(cb));
        }

        if (opts) retry(opts, taskFn, callback);
        else retry(taskFn, callback);

    });
};

/**
 * Run the functions in the `tasks` collection in series, each one running once
 * the previous function has completed. If any functions in the series pass an
 * error to its callback, no more functions are run, and `callback` is
 * immediately called with the value of the error. Otherwise, `callback`
 * receives an array of results when `tasks` have completed.
 *
 * It is also possible to use an object instead of an array. Each property will
 * be run as a function, and the results will be passed to the final `callback`
 * as an object instead of an array. This can be a more readable way of handling
 *  results from {@link async.series}.
 *
 * **Note** that while many implementations preserve the order of object
 * properties, the [ECMAScript Language Specification](http://www.ecma-international.org/ecma-262/5.1/#sec-8.6)
 * explicitly states that
 *
 * > The mechanics and order of enumerating the properties is not specified.
 *
 * So if you rely on the order in which your series of functions are executed,
 * and want this to work on all platforms, consider using an array.
 *
 * @name series
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Array|Iterable|Object} tasks - A collection containing
 * [async functions]{@link AsyncFunction} to run in series.
 * Each function can complete with any number of optional `result` values.
 * @param {Function} [callback] - An optional callback to run once all the
 * functions have completed. This function gets a results array (or object)
 * containing all the result arguments passed to the `task` callbacks. Invoked
 * with (err, result).
 * @example
 * async.series([
 *     function(callback) {
 *         // do some stuff ...
 *         callback(null, 'one');
 *     },
 *     function(callback) {
 *         // do some more stuff ...
 *         callback(null, 'two');
 *     }
 * ],
 * // optional callback
 * function(err, results) {
 *     // results is now equal to ['one', 'two']
 * });
 *
 * async.series({
 *     one: function(callback) {
 *         setTimeout(function() {
 *             callback(null, 1);
 *         }, 200);
 *     },
 *     two: function(callback){
 *         setTimeout(function() {
 *             callback(null, 2);
 *         }, 100);
 *     }
 * }, function(err, results) {
 *     // results is now equal to: {one: 1, two: 2}
 * });
 */
function series(tasks, callback) {
    _parallel(eachOfSeries, tasks, callback);
}

/**
 * Returns `true` if at least one element in the `coll` satisfies an async test.
 * If any iteratee call returns `true`, the main `callback` is immediately
 * called.
 *
 * @name some
 * @static
 * @memberOf module:Collections
 * @method
 * @alias any
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async truth test to apply to each item
 * in the collections in parallel.
 * The iteratee should complete with a boolean `result` value.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called as soon as any
 * iteratee returns `true`, or after all the iteratee functions have finished.
 * Result will be either `true` or `false` depending on the values of the async
 * tests. Invoked with (err, result).
 * @example
 *
 * async.some(['file1','file2','file3'], function(filePath, callback) {
 *     fs.access(filePath, function(err) {
 *         callback(null, !err)
 *     });
 * }, function(err, result) {
 *     // if result is true then at least one of the files exists
 * });
 */
var some = doParallel(_createTester(Boolean, identity));

/**
 * The same as [`some`]{@link module:Collections.some} but runs a maximum of `limit` async operations at a time.
 *
 * @name someLimit
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.some]{@link module:Collections.some}
 * @alias anyLimit
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - An async truth test to apply to each item
 * in the collections in parallel.
 * The iteratee should complete with a boolean `result` value.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called as soon as any
 * iteratee returns `true`, or after all the iteratee functions have finished.
 * Result will be either `true` or `false` depending on the values of the async
 * tests. Invoked with (err, result).
 */
var someLimit = doParallelLimit(_createTester(Boolean, identity));

/**
 * The same as [`some`]{@link module:Collections.some} but runs only a single async operation at a time.
 *
 * @name someSeries
 * @static
 * @memberOf module:Collections
 * @method
 * @see [async.some]{@link module:Collections.some}
 * @alias anySeries
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async truth test to apply to each item
 * in the collections in series.
 * The iteratee should complete with a boolean `result` value.
 * Invoked with (item, callback).
 * @param {Function} [callback] - A callback which is called as soon as any
 * iteratee returns `true`, or after all the iteratee functions have finished.
 * Result will be either `true` or `false` depending on the values of the async
 * tests. Invoked with (err, result).
 */
var someSeries = doLimit(someLimit, 1);

/**
 * Sorts a list by the results of running each `coll` value through an async
 * `iteratee`.
 *
 * @name sortBy
 * @static
 * @memberOf module:Collections
 * @method
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {AsyncFunction} iteratee - An async function to apply to each item in
 * `coll`.
 * The iteratee should complete with a value to use as the sort criteria as
 * its `result`.
 * Invoked with (item, callback).
 * @param {Function} callback - A callback which is called after all the
 * `iteratee` functions have finished, or an error occurs. Results is the items
 * from the original `coll` sorted by the values returned by the `iteratee`
 * calls. Invoked with (err, results).
 * @example
 *
 * async.sortBy(['file1','file2','file3'], function(file, callback) {
 *     fs.stat(file, function(err, stats) {
 *         callback(err, stats.mtime);
 *     });
 * }, function(err, results) {
 *     // results is now the original array of files sorted by
 *     // modified date
 * });
 *
 * // By modifying the callback parameter the
 * // sorting order can be influenced:
 *
 * // ascending order
 * async.sortBy([1,9,3,5], function(x, callback) {
 *     callback(null, x);
 * }, function(err,result) {
 *     // result callback
 * });
 *
 * // descending order
 * async.sortBy([1,9,3,5], function(x, callback) {
 *     callback(null, x*-1);    //<- x*-1 instead of x, turns the order around
 * }, function(err,result) {
 *     // result callback
 * });
 */
function sortBy (coll, iteratee, callback) {
    var _iteratee = wrapAsync(iteratee);
    map(coll, function (x, callback) {
        _iteratee(x, function (err, criteria) {
            if (err) return callback(err);
            callback(null, {value: x, criteria: criteria});
        });
    }, function (err, results) {
        if (err) return callback(err);
        callback(null, arrayMap(results.sort(comparator), baseProperty('value')));
    });

    function comparator(left, right) {
        var a = left.criteria, b = right.criteria;
        return a < b ? -1 : a > b ? 1 : 0;
    }
}

/**
 * Sets a time limit on an asynchronous function. If the function does not call
 * its callback within the specified milliseconds, it will be called with a
 * timeout error. The code property for the error object will be `'ETIMEDOUT'`.
 *
 * @name timeout
 * @static
 * @memberOf module:Utils
 * @method
 * @category Util
 * @param {AsyncFunction} asyncFn - The async function to limit in time.
 * @param {number} milliseconds - The specified time limit.
 * @param {*} [info] - Any variable you want attached (`string`, `object`, etc)
 * to timeout Error for more information..
 * @returns {AsyncFunction} Returns a wrapped function that can be used with any
 * of the control flow functions.
 * Invoke this function with the same parameters as you would `asyncFunc`.
 * @example
 *
 * function myFunction(foo, callback) {
 *     doAsyncTask(foo, function(err, data) {
 *         // handle errors
 *         if (err) return callback(err);
 *
 *         // do some stuff ...
 *
 *         // return processed data
 *         return callback(null, data);
 *     });
 * }
 *
 * var wrapped = async.timeout(myFunction, 1000);
 *
 * // call `wrapped` as you would `myFunction`
 * wrapped({ bar: 'bar' }, function(err, data) {
 *     // if `myFunction` takes < 1000 ms to execute, `err`
 *     // and `data` will have their expected values
 *
 *     // else `err` will be an Error with the code 'ETIMEDOUT'
 * });
 */
function timeout(asyncFn, milliseconds, info) {
    var fn = wrapAsync(asyncFn);

    return initialParams(function (args, callback) {
        var timedOut = false;
        var timer;

        function timeoutCallback() {
            var name = asyncFn.name || 'anonymous';
            var error  = new Error('Callback function "' + name + '" timed out.');
            error.code = 'ETIMEDOUT';
            if (info) {
                error.info = info;
            }
            timedOut = true;
            callback(error);
        }

        args.push(function () {
            if (!timedOut) {
                callback.apply(null, arguments);
                clearTimeout(timer);
            }
        });

        // setup timer and call original function
        timer = setTimeout(timeoutCallback, milliseconds);
        fn.apply(null, args);
    });
}

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeCeil = Math.ceil;
var nativeMax = Math.max;

/**
 * The base implementation of `_.range` and `_.rangeRight` which doesn't
 * coerce arguments.
 *
 * @private
 * @param {number} start The start of the range.
 * @param {number} end The end of the range.
 * @param {number} step The value to increment or decrement by.
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {Array} Returns the range of numbers.
 */
function baseRange(start, end, step, fromRight) {
  var index = -1,
      length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
      result = Array(length);

  while (length--) {
    result[fromRight ? length : ++index] = start;
    start += step;
  }
  return result;
}

/**
 * The same as [times]{@link module:ControlFlow.times} but runs a maximum of `limit` async operations at a
 * time.
 *
 * @name timesLimit
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.times]{@link module:ControlFlow.times}
 * @category Control Flow
 * @param {number} count - The number of times to run the function.
 * @param {number} limit - The maximum number of async operations at a time.
 * @param {AsyncFunction} iteratee - The async function to call `n` times.
 * Invoked with the iteration index and a callback: (n, next).
 * @param {Function} callback - see [async.map]{@link module:Collections.map}.
 */
function timeLimit(count, limit, iteratee, callback) {
    var _iteratee = wrapAsync(iteratee);
    mapLimit(baseRange(0, count, 1), limit, _iteratee, callback);
}

/**
 * Calls the `iteratee` function `n` times, and accumulates results in the same
 * manner you would use with [map]{@link module:Collections.map}.
 *
 * @name times
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.map]{@link module:Collections.map}
 * @category Control Flow
 * @param {number} n - The number of times to run the function.
 * @param {AsyncFunction} iteratee - The async function to call `n` times.
 * Invoked with the iteration index and a callback: (n, next).
 * @param {Function} callback - see {@link module:Collections.map}.
 * @example
 *
 * // Pretend this is some complicated async factory
 * var createUser = function(id, callback) {
 *     callback(null, {
 *         id: 'user' + id
 *     });
 * };
 *
 * // generate 5 users
 * async.times(5, function(n, next) {
 *     createUser(n, function(err, user) {
 *         next(err, user);
 *     });
 * }, function(err, users) {
 *     // we should now have 5 users
 * });
 */
var times = doLimit(timeLimit, Infinity);

/**
 * The same as [times]{@link module:ControlFlow.times} but runs only a single async operation at a time.
 *
 * @name timesSeries
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.times]{@link module:ControlFlow.times}
 * @category Control Flow
 * @param {number} n - The number of times to run the function.
 * @param {AsyncFunction} iteratee - The async function to call `n` times.
 * Invoked with the iteration index and a callback: (n, next).
 * @param {Function} callback - see {@link module:Collections.map}.
 */
var timesSeries = doLimit(timeLimit, 1);

/**
 * A relative of `reduce`.  Takes an Object or Array, and iterates over each
 * element in series, each step potentially mutating an `accumulator` value.
 * The type of the accumulator defaults to the type of collection passed in.
 *
 * @name transform
 * @static
 * @memberOf module:Collections
 * @method
 * @category Collection
 * @param {Array|Iterable|Object} coll - A collection to iterate over.
 * @param {*} [accumulator] - The initial state of the transform.  If omitted,
 * it will default to an empty Object or Array, depending on the type of `coll`
 * @param {AsyncFunction} iteratee - A function applied to each item in the
 * collection that potentially modifies the accumulator.
 * Invoked with (accumulator, item, key, callback).
 * @param {Function} [callback] - A callback which is called after all the
 * `iteratee` functions have finished. Result is the transformed accumulator.
 * Invoked with (err, result).
 * @example
 *
 * async.transform([1,2,3], function(acc, item, index, callback) {
 *     // pointless async:
 *     process.nextTick(function() {
 *         acc.push(item * 2)
 *         callback(null)
 *     });
 * }, function(err, result) {
 *     // result is now equal to [2, 4, 6]
 * });
 *
 * @example
 *
 * async.transform({a: 1, b: 2, c: 3}, function (obj, val, key, callback) {
 *     setImmediate(function () {
 *         obj[key] = val * 2;
 *         callback();
 *     })
 * }, function (err, result) {
 *     // result is equal to {a: 2, b: 4, c: 6}
 * })
 */
function transform (coll, accumulator, iteratee, callback) {
    if (arguments.length <= 3) {
        callback = iteratee;
        iteratee = accumulator;
        accumulator = isArray(coll) ? [] : {};
    }
    callback = once(callback || noop);
    var _iteratee = wrapAsync(iteratee);

    eachOf(coll, function(v, k, cb) {
        _iteratee(accumulator, v, k, cb);
    }, function(err) {
        callback(err, accumulator);
    });
}

/**
 * It runs each task in series but stops whenever any of the functions were
 * successful. If one of the tasks were successful, the `callback` will be
 * passed the result of the successful task. If all tasks fail, the callback
 * will be passed the error and result (if any) of the final attempt.
 *
 * @name tryEach
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Array|Iterable|Object} tasks - A collection containing functions to
 * run, each function is passed a `callback(err, result)` it must call on
 * completion with an error `err` (which can be `null`) and an optional `result`
 * value.
 * @param {Function} [callback] - An optional callback which is called when one
 * of the tasks has succeeded, or all have failed. It receives the `err` and
 * `result` arguments of the last attempt at completing the `task`. Invoked with
 * (err, results).
 * @example
 * async.tryEach([
 *     function getDataFromFirstWebsite(callback) {
 *         // Try getting the data from the first website
 *         callback(err, data);
 *     },
 *     function getDataFromSecondWebsite(callback) {
 *         // First website failed,
 *         // Try getting the data from the backup website
 *         callback(err, data);
 *     }
 * ],
 * // optional callback
 * function(err, results) {
 *     Now do something with the data.
 * });
 *
 */
function tryEach(tasks, callback) {
    var error = null;
    var result;
    callback = callback || noop;
    eachSeries(tasks, function(task, callback) {
        wrapAsync(task)(function (err, res/*, ...args*/) {
            if (arguments.length > 2) {
                result = slice(arguments, 1);
            } else {
                result = res;
            }
            error = err;
            callback(!err);
        });
    }, function () {
        callback(error, result);
    });
}

/**
 * Undoes a [memoize]{@link module:Utils.memoize}d function, reverting it to the original,
 * unmemoized form. Handy for testing.
 *
 * @name unmemoize
 * @static
 * @memberOf module:Utils
 * @method
 * @see [async.memoize]{@link module:Utils.memoize}
 * @category Util
 * @param {AsyncFunction} fn - the memoized function
 * @returns {AsyncFunction} a function that calls the original unmemoized function
 */
function unmemoize(fn) {
    return function () {
        return (fn.unmemoized || fn).apply(null, arguments);
    };
}

/**
 * Repeatedly call `iteratee`, while `test` returns `true`. Calls `callback` when
 * stopped, or an error occurs.
 *
 * @name whilst
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Function} test - synchronous truth test to perform before each
 * execution of `iteratee`. Invoked with ().
 * @param {AsyncFunction} iteratee - An async function which is called each time
 * `test` passes. Invoked with (callback).
 * @param {Function} [callback] - A callback which is called after the test
 * function has failed and repeated execution of `iteratee` has stopped. `callback`
 * will be passed an error and any arguments passed to the final `iteratee`'s
 * callback. Invoked with (err, [results]);
 * @returns undefined
 * @example
 *
 * var count = 0;
 * async.whilst(
 *     function() { return count < 5; },
 *     function(callback) {
 *         count++;
 *         setTimeout(function() {
 *             callback(null, count);
 *         }, 1000);
 *     },
 *     function (err, n) {
 *         // 5 seconds have passed, n = 5
 *     }
 * );
 */
function whilst(test, iteratee, callback) {
    callback = onlyOnce(callback || noop);
    var _iteratee = wrapAsync(iteratee);
    if (!test()) return callback(null);
    var next = function(err/*, ...args*/) {
        if (err) return callback(err);
        if (test()) return _iteratee(next);
        var args = slice(arguments, 1);
        callback.apply(null, [null].concat(args));
    };
    _iteratee(next);
}

/**
 * Repeatedly call `iteratee` until `test` returns `true`. Calls `callback` when
 * stopped, or an error occurs. `callback` will be passed an error and any
 * arguments passed to the final `iteratee`'s callback.
 *
 * The inverse of [whilst]{@link module:ControlFlow.whilst}.
 *
 * @name until
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.whilst]{@link module:ControlFlow.whilst}
 * @category Control Flow
 * @param {Function} test - synchronous truth test to perform before each
 * execution of `iteratee`. Invoked with ().
 * @param {AsyncFunction} iteratee - An async function which is called each time
 * `test` fails. Invoked with (callback).
 * @param {Function} [callback] - A callback which is called after the test
 * function has passed and repeated execution of `iteratee` has stopped. `callback`
 * will be passed an error and any arguments passed to the final `iteratee`'s
 * callback. Invoked with (err, [results]);
 */
function until(test, iteratee, callback) {
    whilst(function() {
        return !test.apply(this, arguments);
    }, iteratee, callback);
}

/**
 * Runs the `tasks` array of functions in series, each passing their results to
 * the next in the array. However, if any of the `tasks` pass an error to their
 * own callback, the next function is not executed, and the main `callback` is
 * immediately called with the error.
 *
 * @name waterfall
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @category Control Flow
 * @param {Array} tasks - An array of [async functions]{@link AsyncFunction}
 * to run.
 * Each function should complete with any number of `result` values.
 * The `result` values will be passed as arguments, in order, to the next task.
 * @param {Function} [callback] - An optional callback to run once all the
 * functions have completed. This will be passed the results of the last task's
 * callback. Invoked with (err, [results]).
 * @returns undefined
 * @example
 *
 * async.waterfall([
 *     function(callback) {
 *         callback(null, 'one', 'two');
 *     },
 *     function(arg1, arg2, callback) {
 *         // arg1 now equals 'one' and arg2 now equals 'two'
 *         callback(null, 'three');
 *     },
 *     function(arg1, callback) {
 *         // arg1 now equals 'three'
 *         callback(null, 'done');
 *     }
 * ], function (err, result) {
 *     // result now equals 'done'
 * });
 *
 * // Or, with named functions:
 * async.waterfall([
 *     myFirstFunction,
 *     mySecondFunction,
 *     myLastFunction,
 * ], function (err, result) {
 *     // result now equals 'done'
 * });
 * function myFirstFunction(callback) {
 *     callback(null, 'one', 'two');
 * }
 * function mySecondFunction(arg1, arg2, callback) {
 *     // arg1 now equals 'one' and arg2 now equals 'two'
 *     callback(null, 'three');
 * }
 * function myLastFunction(arg1, callback) {
 *     // arg1 now equals 'three'
 *     callback(null, 'done');
 * }
 */
var waterfall = function(tasks, callback) {
    callback = once(callback || noop);
    if (!isArray(tasks)) return callback(new Error('First argument to waterfall must be an array of functions'));
    if (!tasks.length) return callback();
    var taskIndex = 0;

    function nextTask(args) {
        var task = wrapAsync(tasks[taskIndex++]);
        args.push(onlyOnce(next));
        task.apply(null, args);
    }

    function next(err/*, ...args*/) {
        if (err || taskIndex === tasks.length) {
            return callback.apply(null, arguments);
        }
        nextTask(slice(arguments, 1));
    }

    nextTask([]);
};

/**
 * An "async function" in the context of Async is an asynchronous function with
 * a variable number of parameters, with the final parameter being a callback.
 * (`function (arg1, arg2, ..., callback) {}`)
 * The final callback is of the form `callback(err, results...)`, which must be
 * called once the function is completed.  The callback should be called with a
 * Error as its first argument to signal that an error occurred.
 * Otherwise, if no error occurred, it should be called with `null` as the first
 * argument, and any additional `result` arguments that may apply, to signal
 * successful completion.
 * The callback must be called exactly once, ideally on a later tick of the
 * JavaScript event loop.
 *
 * This type of function is also referred to as a "Node-style async function",
 * or a "continuation passing-style function" (CPS). Most of the methods of this
 * library are themselves CPS/Node-style async functions, or functions that
 * return CPS/Node-style async functions.
 *
 * Wherever we accept a Node-style async function, we also directly accept an
 * [ES2017 `async` function]{@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function}.
 * In this case, the `async` function will not be passed a final callback
 * argument, and any thrown error will be used as the `err` argument of the
 * implicit callback, and the return value will be used as the `result` value.
 * (i.e. a `rejected` of the returned Promise becomes the `err` callback
 * argument, and a `resolved` value becomes the `result`.)
 *
 * Note, due to JavaScript limitations, we can only detect native `async`
 * functions and not transpilied implementations.
 * Your environment must have `async`/`await` support for this to work.
 * (e.g. Node > v7.6, or a recent version of a modern browser).
 * If you are using `async` functions through a transpiler (e.g. Babel), you
 * must still wrap the function with [asyncify]{@link module:Utils.asyncify},
 * because the `async function` will be compiled to an ordinary function that
 * returns a promise.
 *
 * @typedef {Function} AsyncFunction
 * @static
 */

/**
 * Async is a utility module which provides straight-forward, powerful functions
 * for working with asynchronous JavaScript. Although originally designed for
 * use with [Node.js](http://nodejs.org) and installable via
 * `npm install --save async`, it can also be used directly in the browser.
 * @module async
 * @see AsyncFunction
 */


/**
 * A collection of `async` functions for manipulating collections, such as
 * arrays and objects.
 * @module Collections
 */

/**
 * A collection of `async` functions for controlling the flow through a script.
 * @module ControlFlow
 */

/**
 * A collection of `async` utility functions.
 * @module Utils
 */

var index = {
    apply: apply,
    applyEach: applyEach,
    applyEachSeries: applyEachSeries,
    asyncify: asyncify,
    auto: auto,
    autoInject: autoInject,
    cargo: cargo,
    compose: compose,
    concat: concat,
    concatLimit: concatLimit,
    concatSeries: concatSeries,
    constant: constant,
    detect: detect,
    detectLimit: detectLimit,
    detectSeries: detectSeries,
    dir: dir,
    doDuring: doDuring,
    doUntil: doUntil,
    doWhilst: doWhilst,
    during: during,
    each: eachLimit,
    eachLimit: eachLimit$1,
    eachOf: eachOf,
    eachOfLimit: eachOfLimit,
    eachOfSeries: eachOfSeries,
    eachSeries: eachSeries,
    ensureAsync: ensureAsync,
    every: every,
    everyLimit: everyLimit,
    everySeries: everySeries,
    filter: filter,
    filterLimit: filterLimit,
    filterSeries: filterSeries,
    forever: forever,
    groupBy: groupBy,
    groupByLimit: groupByLimit,
    groupBySeries: groupBySeries,
    log: log,
    map: map,
    mapLimit: mapLimit,
    mapSeries: mapSeries,
    mapValues: mapValues,
    mapValuesLimit: mapValuesLimit,
    mapValuesSeries: mapValuesSeries,
    memoize: memoize,
    nextTick: nextTick,
    parallel: parallelLimit,
    parallelLimit: parallelLimit$1,
    priorityQueue: priorityQueue,
    queue: queue$1,
    race: race,
    reduce: reduce,
    reduceRight: reduceRight,
    reflect: reflect,
    reflectAll: reflectAll,
    reject: reject,
    rejectLimit: rejectLimit,
    rejectSeries: rejectSeries,
    retry: retry,
    retryable: retryable,
    seq: seq,
    series: series,
    setImmediate: setImmediate$1,
    some: some,
    someLimit: someLimit,
    someSeries: someSeries,
    sortBy: sortBy,
    timeout: timeout,
    times: times,
    timesLimit: timeLimit,
    timesSeries: timesSeries,
    transform: transform,
    tryEach: tryEach,
    unmemoize: unmemoize,
    until: until,
    waterfall: waterfall,
    whilst: whilst,

    // aliases
    all: every,
    allLimit: everyLimit,
    allSeries: everySeries,
    any: some,
    anyLimit: someLimit,
    anySeries: someSeries,
    find: detect,
    findLimit: detectLimit,
    findSeries: detectSeries,
    forEach: eachLimit,
    forEachSeries: eachSeries,
    forEachLimit: eachLimit$1,
    forEachOf: eachOf,
    forEachOfSeries: eachOfSeries,
    forEachOfLimit: eachOfLimit,
    inject: reduce,
    foldl: reduce,
    foldr: reduceRight,
    select: filter,
    selectLimit: filterLimit,
    selectSeries: filterSeries,
    wrapSync: asyncify
};

exports['default'] = index;
exports.apply = apply;
exports.applyEach = applyEach;
exports.applyEachSeries = applyEachSeries;
exports.asyncify = asyncify;
exports.auto = auto;
exports.autoInject = autoInject;
exports.cargo = cargo;
exports.compose = compose;
exports.concat = concat;
exports.concatLimit = concatLimit;
exports.concatSeries = concatSeries;
exports.constant = constant;
exports.detect = detect;
exports.detectLimit = detectLimit;
exports.detectSeries = detectSeries;
exports.dir = dir;
exports.doDuring = doDuring;
exports.doUntil = doUntil;
exports.doWhilst = doWhilst;
exports.during = during;
exports.each = eachLimit;
exports.eachLimit = eachLimit$1;
exports.eachOf = eachOf;
exports.eachOfLimit = eachOfLimit;
exports.eachOfSeries = eachOfSeries;
exports.eachSeries = eachSeries;
exports.ensureAsync = ensureAsync;
exports.every = every;
exports.everyLimit = everyLimit;
exports.everySeries = everySeries;
exports.filter = filter;
exports.filterLimit = filterLimit;
exports.filterSeries = filterSeries;
exports.forever = forever;
exports.groupBy = groupBy;
exports.groupByLimit = groupByLimit;
exports.groupBySeries = groupBySeries;
exports.log = log;
exports.map = map;
exports.mapLimit = mapLimit;
exports.mapSeries = mapSeries;
exports.mapValues = mapValues;
exports.mapValuesLimit = mapValuesLimit;
exports.mapValuesSeries = mapValuesSeries;
exports.memoize = memoize;
exports.nextTick = nextTick;
exports.parallel = parallelLimit;
exports.parallelLimit = parallelLimit$1;
exports.priorityQueue = priorityQueue;
exports.queue = queue$1;
exports.race = race;
exports.reduce = reduce;
exports.reduceRight = reduceRight;
exports.reflect = reflect;
exports.reflectAll = reflectAll;
exports.reject = reject;
exports.rejectLimit = rejectLimit;
exports.rejectSeries = rejectSeries;
exports.retry = retry;
exports.retryable = retryable;
exports.seq = seq;
exports.series = series;
exports.setImmediate = setImmediate$1;
exports.some = some;
exports.someLimit = someLimit;
exports.someSeries = someSeries;
exports.sortBy = sortBy;
exports.timeout = timeout;
exports.times = times;
exports.timesLimit = timeLimit;
exports.timesSeries = timesSeries;
exports.transform = transform;
exports.tryEach = tryEach;
exports.unmemoize = unmemoize;
exports.until = until;
exports.waterfall = waterfall;
exports.whilst = whilst;
exports.all = every;
exports.allLimit = everyLimit;
exports.allSeries = everySeries;
exports.any = some;
exports.anyLimit = someLimit;
exports.anySeries = someSeries;
exports.find = detect;
exports.findLimit = detectLimit;
exports.findSeries = detectSeries;
exports.forEach = eachLimit;
exports.forEachSeries = eachSeries;
exports.forEachLimit = eachLimit$1;
exports.forEachOf = eachOf;
exports.forEachOfSeries = eachOfSeries;
exports.forEachOfLimit = eachOfLimit;
exports.inject = reduce;
exports.foldl = reduce;
exports.foldr = reduceRight;
exports.select = filter;
exports.selectLimit = filterLimit;
exports.selectSeries = filterSeries;
exports.wrapSync = asyncify;

Object.defineProperty(exports, '__esModule', { value: true });

})));

}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{"_process":93}],5:[function(require,module,exports){
(function (global){
/*! https://mths.be/punycode v1.4.1 by @mathias */
;(function(root) {

	/** Detect free variables */
	var freeExports = typeof exports == 'object' && exports &&
		!exports.nodeType && exports;
	var freeModule = typeof module == 'object' && module &&
		!module.nodeType && module;
	var freeGlobal = typeof global == 'object' && global;
	if (
		freeGlobal.global === freeGlobal ||
		freeGlobal.window === freeGlobal ||
		freeGlobal.self === freeGlobal
	) {
		root = freeGlobal;
	}

	/**
	 * The `punycode` object.
	 * @name punycode
	 * @type Object
	 */
	var punycode,

	/** Highest positive signed 32-bit float value */
	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1

	/** Bootstring parameters */
	base = 36,
	tMin = 1,
	tMax = 26,
	skew = 38,
	damp = 700,
	initialBias = 72,
	initialN = 128, // 0x80
	delimiter = '-', // '\x2D'

	/** Regular expressions */
	regexPunycode = /^xn--/,
	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators

	/** Error messages */
	errors = {
		'overflow': 'Overflow: input needs wider integers to process',
		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
		'invalid-input': 'Invalid input'
	},

	/** Convenience shortcuts */
	baseMinusTMin = base - tMin,
	floor = Math.floor,
	stringFromCharCode = String.fromCharCode,

	/** Temporary variable */
	key;

	/*--------------------------------------------------------------------------*/

	/**
	 * A generic error utility function.
	 * @private
	 * @param {String} type The error type.
	 * @returns {Error} Throws a `RangeError` with the applicable error message.
	 */
	function error(type) {
		throw new RangeError(errors[type]);
	}

	/**
	 * A generic `Array#map` utility function.
	 * @private
	 * @param {Array} array The array to iterate over.
	 * @param {Function} callback The function that gets called for every array
	 * item.
	 * @returns {Array} A new array of values returned by the callback function.
	 */
	function map(array, fn) {
		var length = array.length;
		var result = [];
		while (length--) {
			result[length] = fn(array[length]);
		}
		return result;
	}

	/**
	 * A simple `Array#map`-like wrapper to work with domain name strings or email
	 * addresses.
	 * @private
	 * @param {String} domain The domain name or email address.
	 * @param {Function} callback The function that gets called for every
	 * character.
	 * @returns {Array} A new string of characters returned by the callback
	 * function.
	 */
	function mapDomain(string, fn) {
		var parts = string.split('@');
		var result = '';
		if (parts.length > 1) {
			// In email addresses, only the domain name should be punycoded. Leave
			// the local part (i.e. everything up to `@`) intact.
			result = parts[0] + '@';
			string = parts[1];
		}
		// Avoid `split(regex)` for IE8 compatibility. See #17.
		string = string.replace(regexSeparators, '\x2E');
		var labels = string.split('.');
		var encoded = map(labels, fn).join('.');
		return result + encoded;
	}

	/**
	 * Creates an array containing the numeric code points of each Unicode
	 * character in the string. While JavaScript uses UCS-2 internally,
	 * this function will convert a pair of surrogate halves (each of which
	 * UCS-2 exposes as separate characters) into a single code point,
	 * matching UTF-16.
	 * @see `punycode.ucs2.encode`
	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
	 * @memberOf punycode.ucs2
	 * @name decode
	 * @param {String} string The Unicode input string (UCS-2).
	 * @returns {Array} The new array of code points.
	 */
	function ucs2decode(string) {
		var output = [],
		    counter = 0,
		    length = string.length,
		    value,
		    extra;
		while (counter < length) {
			value = string.charCodeAt(counter++);
			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
				// high surrogate, and there is a next character
				extra = string.charCodeAt(counter++);
				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
				} else {
					// unmatched surrogate; only append this code unit, in case the next
					// code unit is the high surrogate of a surrogate pair
					output.push(value);
					counter--;
				}
			} else {
				output.push(value);
			}
		}
		return output;
	}

	/**
	 * Creates a string based on an array of numeric code points.
	 * @see `punycode.ucs2.decode`
	 * @memberOf punycode.ucs2
	 * @name encode
	 * @param {Array} codePoints The array of numeric code points.
	 * @returns {String} The new Unicode string (UCS-2).
	 */
	function ucs2encode(array) {
		return map(array, function(value) {
			var output = '';
			if (value > 0xFFFF) {
				value -= 0x10000;
				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
				value = 0xDC00 | value & 0x3FF;
			}
			output += stringFromCharCode(value);
			return output;
		}).join('');
	}

	/**
	 * Converts a basic code point into a digit/integer.
	 * @see `digitToBasic()`
	 * @private
	 * @param {Number} codePoint The basic numeric code point value.
	 * @returns {Number} The numeric value of a basic code point (for use in
	 * representing integers) in the range `0` to `base - 1`, or `base` if
	 * the code point does not represent a value.
	 */
	function basicToDigit(codePoint) {
		if (codePoint - 48 < 10) {
			return codePoint - 22;
		}
		if (codePoint - 65 < 26) {
			return codePoint - 65;
		}
		if (codePoint - 97 < 26) {
			return codePoint - 97;
		}
		return base;
	}

	/**
	 * Converts a digit/integer into a basic code point.
	 * @see `basicToDigit()`
	 * @private
	 * @param {Number} digit The numeric value of a basic code point.
	 * @returns {Number} The basic code point whose value (when used for
	 * representing integers) is `digit`, which needs to be in the range
	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
	 * used; else, the lowercase form is used. The behavior is undefined
	 * if `flag` is non-zero and `digit` has no uppercase form.
	 */
	function digitToBasic(digit, flag) {
		//  0..25 map to ASCII a..z or A..Z
		// 26..35 map to ASCII 0..9
		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
	}

	/**
	 * Bias adaptation function as per section 3.4 of RFC 3492.
	 * https://tools.ietf.org/html/rfc3492#section-3.4
	 * @private
	 */
	function adapt(delta, numPoints, firstTime) {
		var k = 0;
		delta = firstTime ? floor(delta / damp) : delta >> 1;
		delta += floor(delta / numPoints);
		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
			delta = floor(delta / baseMinusTMin);
		}
		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
	}

	/**
	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
	 * symbols.
	 * @memberOf punycode
	 * @param {String} input The Punycode string of ASCII-only symbols.
	 * @returns {String} The resulting string of Unicode symbols.
	 */
	function decode(input) {
		// Don't use UCS-2
		var output = [],
		    inputLength = input.length,
		    out,
		    i = 0,
		    n = initialN,
		    bias = initialBias,
		    basic,
		    j,
		    index,
		    oldi,
		    w,
		    k,
		    digit,
		    t,
		    /** Cached calculation results */
		    baseMinusT;

		// Handle the basic code points: let `basic` be the number of input code
		// points before the last delimiter, or `0` if there is none, then copy
		// the first basic code points to the output.

		basic = input.lastIndexOf(delimiter);
		if (basic < 0) {
			basic = 0;
		}

		for (j = 0; j < basic; ++j) {
			// if it's not a basic code point
			if (input.charCodeAt(j) >= 0x80) {
				error('not-basic');
			}
			output.push(input.charCodeAt(j));
		}

		// Main decoding loop: start just after the last delimiter if any basic code
		// points were copied; start at the beginning otherwise.

		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {

			// `index` is the index of the next character to be consumed.
			// Decode a generalized variable-length integer into `delta`,
			// which gets added to `i`. The overflow checking is easier
			// if we increase `i` as we go, then subtract off its starting
			// value at the end to obtain `delta`.
			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {

				if (index >= inputLength) {
					error('invalid-input');
				}

				digit = basicToDigit(input.charCodeAt(index++));

				if (digit >= base || digit > floor((maxInt - i) / w)) {
					error('overflow');
				}

				i += digit * w;
				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);

				if (digit < t) {
					break;
				}

				baseMinusT = base - t;
				if (w > floor(maxInt / baseMinusT)) {
					error('overflow');
				}

				w *= baseMinusT;

			}

			out = output.length + 1;
			bias = adapt(i - oldi, out, oldi == 0);

			// `i` was supposed to wrap around from `out` to `0`,
			// incrementing `n` each time, so we'll fix that now:
			if (floor(i / out) > maxInt - n) {
				error('overflow');
			}

			n += floor(i / out);
			i %= out;

			// Insert `n` at position `i` of the output
			output.splice(i++, 0, n);

		}

		return ucs2encode(output);
	}

	/**
	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
	 * Punycode string of ASCII-only symbols.
	 * @memberOf punycode
	 * @param {String} input The string of Unicode symbols.
	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
	 */
	function encode(input) {
		var n,
		    delta,
		    handledCPCount,
		    basicLength,
		    bias,
		    j,
		    m,
		    q,
		    k,
		    t,
		    currentValue,
		    output = [],
		    /** `inputLength` will hold the number of code points in `input`. */
		    inputLength,
		    /** Cached calculation results */
		    handledCPCountPlusOne,
		    baseMinusT,
		    qMinusT;

		// Convert the input in UCS-2 to Unicode
		input = ucs2decode(input);

		// Cache the length
		inputLength = input.length;

		// Initialize the state
		n = initialN;
		delta = 0;
		bias = initialBias;

		// Handle the basic code points
		for (j = 0; j < inputLength; ++j) {
			currentValue = input[j];
			if (currentValue < 0x80) {
				output.push(stringFromCharCode(currentValue));
			}
		}

		handledCPCount = basicLength = output.length;

		// `handledCPCount` is the number of code points that have been handled;
		// `basicLength` is the number of basic code points.

		// Finish the basic string - if it is not empty - with a delimiter
		if (basicLength) {
			output.push(delimiter);
		}

		// Main encoding loop:
		while (handledCPCount < inputLength) {

			// All non-basic code points < n have been handled already. Find the next
			// larger one:
			for (m = maxInt, j = 0; j < inputLength; ++j) {
				currentValue = input[j];
				if (currentValue >= n && currentValue < m) {
					m = currentValue;
				}
			}

			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
			// but guard against overflow
			handledCPCountPlusOne = handledCPCount + 1;
			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
				error('overflow');
			}

			delta += (m - n) * handledCPCountPlusOne;
			n = m;

			for (j = 0; j < inputLength; ++j) {
				currentValue = input[j];

				if (currentValue < n && ++delta > maxInt) {
					error('overflow');
				}

				if (currentValue == n) {
					// Represent delta as a generalized variable-length integer
					for (q = delta, k = base; /* no condition */; k += base) {
						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
						if (q < t) {
							break;
						}
						qMinusT = q - t;
						baseMinusT = base - t;
						output.push(
							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
						);
						q = floor(qMinusT / baseMinusT);
					}

					output.push(stringFromCharCode(digitToBasic(q, 0)));
					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
					delta = 0;
					++handledCPCount;
				}
			}

			++delta;
			++n;

		}
		return output.join('');
	}

	/**
	 * Converts a Punycode string representing a domain name or an email address
	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
	 * it doesn't matter if you call it on a string that has already been
	 * converted to Unicode.
	 * @memberOf punycode
	 * @param {String} input The Punycoded domain name or email address to
	 * convert to Unicode.
	 * @returns {String} The Unicode representation of the given Punycode
	 * string.
	 */
	function toUnicode(input) {
		return mapDomain(input, function(string) {
			return regexPunycode.test(string)
				? decode(string.slice(4).toLowerCase())
				: string;
		});
	}

	/**
	 * Converts a Unicode string representing a domain name or an email address to
	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
	 * i.e. it doesn't matter if you call it with a domain that's already in
	 * ASCII.
	 * @memberOf punycode
	 * @param {String} input The domain name or email address to convert, as a
	 * Unicode string.
	 * @returns {String} The Punycode representation of the given domain name or
	 * email address.
	 */
	function toASCII(input) {
		return mapDomain(input, function(string) {
			return regexNonASCII.test(string)
				? 'xn--' + encode(string)
				: string;
		});
	}

	/*--------------------------------------------------------------------------*/

	/** Define the public API */
	punycode = {
		/**
		 * A string representing the current Punycode.js version number.
		 * @memberOf punycode
		 * @type String
		 */
		'version': '1.4.1',
		/**
		 * An object of methods to convert from JavaScript's internal character
		 * representation (UCS-2) to Unicode code points, and back.
		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
		 * @memberOf punycode
		 * @type Object
		 */
		'ucs2': {
			'decode': ucs2decode,
			'encode': ucs2encode
		},
		'decode': decode,
		'encode': encode,
		'toASCII': toASCII,
		'toUnicode': toUnicode
	};

	/** Expose `punycode` */
	// Some AMD build optimizers, like r.js, check for specific condition patterns
	// like the following:
	if (
		typeof define == 'function' &&
		typeof define.amd == 'object' &&
		define.amd
	) {
		define('punycode', function() {
			return punycode;
		});
	} else if (freeExports && freeModule) {
		if (module.exports == freeExports) {
			// in Node.js, io.js, or RingoJS v0.8.0+
			freeModule.exports = punycode;
		} else {
			// in Narwhal or RingoJS v0.7.0-
			for (key in punycode) {
				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
			}
		}
	} else {
		// in Rhino or a web browser
		root.punycode = punycode;
	}

}(this));

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],6:[function(require,module,exports){

/**
 * Expose `Emitter`.
 */

if (typeof module !== 'undefined') {
  module.exports = Emitter;
}

/**
 * Initialize a new `Emitter`.
 *
 * @api public
 */

function Emitter(obj) {
  if (obj) return mixin(obj);
};

/**
 * Mixin the emitter properties.
 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */

function mixin(obj) {
  for (var key in Emitter.prototype) {
    obj[key] = Emitter.prototype[key];
  }
  return obj;
}

/**
 * Listen on the given `event` with `fn`.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.on =
Emitter.prototype.addEventListener = function(event, fn){
  this._callbacks = this._callbacks || {};
  (this._callbacks['$' + event] = this._callbacks['$' + event] || [])
    .push(fn);
  return this;
};

/**
 * Adds an `event` listener that will be invoked a single
 * time then automatically removed.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.once = function(event, fn){
  function on() {
    this.off(event, on);
    fn.apply(this, arguments);
  }

  on.fn = fn;
  this.on(event, on);
  return this;
};

/**
 * Remove the given callback for `event` or all
 * registered callbacks.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.off =
Emitter.prototype.removeListener =
Emitter.prototype.removeAllListeners =
Emitter.prototype.removeEventListener = function(event, fn){
  this._callbacks = this._callbacks || {};

  // all
  if (0 == arguments.length) {
    this._callbacks = {};
    return this;
  }

  // specific event
  var callbacks = this._callbacks['$' + event];
  if (!callbacks) return this;

  // remove all handlers
  if (1 == arguments.length) {
    delete this._callbacks['$' + event];
    return this;
  }

  // remove specific handler
  var cb;
  for (var i = 0; i < callbacks.length; i++) {
    cb = callbacks[i];
    if (cb === fn || cb.fn === fn) {
      callbacks.splice(i, 1);
      break;
    }
  }
  return this;
};

/**
 * Emit `event` with the given args.
 *
 * @param {String} event
 * @param {Mixed} ...
 * @return {Emitter}
 */

Emitter.prototype.emit = function(event){
  this._callbacks = this._callbacks || {};
  var args = [].slice.call(arguments, 1)
    , callbacks = this._callbacks['$' + event];

  if (callbacks) {
    callbacks = callbacks.slice(0);
    for (var i = 0, len = callbacks.length; i < len; ++i) {
      callbacks[i].apply(this, args);
    }
  }

  return this;
};

/**
 * Return array of callbacks for `event`.
 *
 * @param {String} event
 * @return {Array}
 * @api public
 */

Emitter.prototype.listeners = function(event){
  this._callbacks = this._callbacks || {};
  return this._callbacks['$' + event] || [];
};

/**
 * Check if this emitter has `event` handlers.
 *
 * @param {String} event
 * @return {Boolean}
 * @api public
 */

Emitter.prototype.hasListeners = function(event){
  return !! this.listeners(event).length;
};

},{}],7:[function(require,module,exports){
/**
 * Copyright (c) 2014, Chris Pettitt
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

var lib = require("./lib");

module.exports = {
  Graph: lib.Graph,
  json: require("./lib/json"),
  alg: require("./lib/alg"),
  version: lib.version
};

},{"./lib":23,"./lib/alg":14,"./lib/json":24}],8:[function(require,module,exports){
var _ = require("../lodash");

module.exports = components;

function components(g) {
  var visited = {},
      cmpts = [],
      cmpt;

  function dfs(v) {
    if (_.has(visited, v)) return;
    visited[v] = true;
    cmpt.push(v);
    _.each(g.successors(v), dfs);
    _.each(g.predecessors(v), dfs);
  }

  _.each(g.nodes(), function(v) {
    cmpt = [];
    dfs(v);
    if (cmpt.length) {
      cmpts.push(cmpt);
    }
  });

  return cmpts;
}

},{"../lodash":25}],9:[function(require,module,exports){
var _ = require("../lodash");

module.exports = dfs;

/*
 * A helper that preforms a pre- or post-order traversal on the input graph
 * and returns the nodes in the order they were visited. If the graph is
 * undirected then this algorithm will navigate using neighbors. If the graph
 * is directed then this algorithm will navigate using successors.
 *
 * Order must be one of "pre" or "post".
 */
function dfs(g, vs, order) {
  if (!_.isArray(vs)) {
    vs = [vs];
  }

  var navigation = (g.isDirected() ? g.successors : g.neighbors).bind(g);

  var acc = [],
      visited = {};
  _.each(vs, function(v) {
    if (!g.hasNode(v)) {
      throw new Error("Graph does not have node: " + v);
    }

    doDfs(g, v, order === "post", visited, navigation, acc);
  });
  return acc;
}

function doDfs(g, v, postorder, visited, navigation, acc) {
  if (!_.has(visited, v)) {
    visited[v] = true;

    if (!postorder) { acc.push(v); }
    _.each(navigation(v), function(w) {
      doDfs(g, w, postorder, visited, navigation, acc);
    });
    if (postorder) { acc.push(v); }
  }
}

},{"../lodash":25}],10:[function(require,module,exports){
var dijkstra = require("./dijkstra"),
    _ = require("../lodash");

module.exports = dijkstraAll;

function dijkstraAll(g, weightFunc, edgeFunc) {
  return _.transform(g.nodes(), function(acc, v) {
    acc[v] = dijkstra(g, v, weightFunc, edgeFunc);
  }, {});
}

},{"../lodash":25,"./dijkstra":11}],11:[function(require,module,exports){
var _ = require("../lodash"),
    PriorityQueue = require("../data/priority-queue");

module.exports = dijkstra;

var DEFAULT_WEIGHT_FUNC = _.constant(1);

function dijkstra(g, source, weightFn, edgeFn) {
  return runDijkstra(g, String(source),
                     weightFn || DEFAULT_WEIGHT_FUNC,
                     edgeFn || function(v) { return g.outEdges(v); });
}

function runDijkstra(g, source, weightFn, edgeFn) {
  var results = {},
      pq = new PriorityQueue(),
      v, vEntry;

  var updateNeighbors = function(edge) {
    var w = edge.v !== v ? edge.v : edge.w,
        wEntry = results[w],
        weight = weightFn(edge),
        distance = vEntry.distance + weight;

    if (weight < 0) {
      throw new Error("dijkstra does not allow negative edge weights. " +
                      "Bad edge: " + edge + " Weight: " + weight);
    }

    if (distance < wEntry.distance) {
      wEntry.distance = distance;
      wEntry.predecessor = v;
      pq.decrease(w, distance);
    }
  };

  g.nodes().forEach(function(v) {
    var distance = v === source ? 0 : Number.POSITIVE_INFINITY;
    results[v] = { distance: distance };
    pq.add(v, distance);
  });

  while (pq.size() > 0) {
    v = pq.removeMin();
    vEntry = results[v];
    if (vEntry.distance === Number.POSITIVE_INFINITY) {
      break;
    }

    edgeFn(v).forEach(updateNeighbors);
  }

  return results;
}

},{"../data/priority-queue":21,"../lodash":25}],12:[function(require,module,exports){
var _ = require("../lodash"),
    tarjan = require("./tarjan");

module.exports = findCycles;

function findCycles(g) {
  return _.filter(tarjan(g), function(cmpt) {
    return cmpt.length > 1 || (cmpt.length === 1 && g.hasEdge(cmpt[0], cmpt[0]));
  });
}

},{"../lodash":25,"./tarjan":19}],13:[function(require,module,exports){
var _ = require("../lodash");

module.exports = floydWarshall;

var DEFAULT_WEIGHT_FUNC = _.constant(1);

function floydWarshall(g, weightFn, edgeFn) {
  return runFloydWarshall(g,
                          weightFn || DEFAULT_WEIGHT_FUNC,
                          edgeFn || function(v) { return g.outEdges(v); });
}

function runFloydWarshall(g, weightFn, edgeFn) {
  var results = {},
      nodes = g.nodes();

  nodes.forEach(function(v) {
    results[v] = {};
    results[v][v] = { distance: 0 };
    nodes.forEach(function(w) {
      if (v !== w) {
        results[v][w] = { distance: Number.POSITIVE_INFINITY };
      }
    });
    edgeFn(v).forEach(function(edge) {
      var w = edge.v === v ? edge.w : edge.v,
          d = weightFn(edge);
      results[v][w] = { distance: d, predecessor: v };
    });
  });

  nodes.forEach(function(k) {
    var rowK = results[k];
    nodes.forEach(function(i) {
      var rowI = results[i];
      nodes.forEach(function(j) {
        var ik = rowI[k];
        var kj = rowK[j];
        var ij = rowI[j];
        var altDistance = ik.distance + kj.distance;
        if (altDistance < ij.distance) {
          ij.distance = altDistance;
          ij.predecessor = kj.predecessor;
        }
      });
    });
  });

  return results;
}

},{"../lodash":25}],14:[function(require,module,exports){
module.exports = {
  components: require("./components"),
  dijkstra: require("./dijkstra"),
  dijkstraAll: require("./dijkstra-all"),
  findCycles: require("./find-cycles"),
  floydWarshall: require("./floyd-warshall"),
  isAcyclic: require("./is-acyclic"),
  postorder: require("./postorder"),
  preorder: require("./preorder"),
  prim: require("./prim"),
  tarjan: require("./tarjan"),
  topsort: require("./topsort")
};

},{"./components":8,"./dijkstra":11,"./dijkstra-all":10,"./find-cycles":12,"./floyd-warshall":13,"./is-acyclic":15,"./postorder":16,"./preorder":17,"./prim":18,"./tarjan":19,"./topsort":20}],15:[function(require,module,exports){
var topsort = require("./topsort");

module.exports = isAcyclic;

function isAcyclic(g) {
  try {
    topsort(g);
  } catch (e) {
    if (e instanceof topsort.CycleException) {
      return false;
    }
    throw e;
  }
  return true;
}

},{"./topsort":20}],16:[function(require,module,exports){
var dfs = require("./dfs");

module.exports = postorder;

function postorder(g, vs) {
  return dfs(g, vs, "post");
}

},{"./dfs":9}],17:[function(require,module,exports){
var dfs = require("./dfs");

module.exports = preorder;

function preorder(g, vs) {
  return dfs(g, vs, "pre");
}

},{"./dfs":9}],18:[function(require,module,exports){
var _ = require("../lodash"),
    Graph = require("../graph"),
    PriorityQueue = require("../data/priority-queue");

module.exports = prim;

function prim(g, weightFunc) {
  var result = new Graph(),
      parents = {},
      pq = new PriorityQueue(),
      v;

  function updateNeighbors(edge) {
    var w = edge.v === v ? edge.w : edge.v,
        pri = pq.priority(w);
    if (pri !== undefined) {
      var edgeWeight = weightFunc(edge);
      if (edgeWeight < pri) {
        parents[w] = v;
        pq.decrease(w, edgeWeight);
      }
    }
  }

  if (g.nodeCount() === 0) {
    return result;
  }

  _.each(g.nodes(), function(v) {
    pq.add(v, Number.POSITIVE_INFINITY);
    result.setNode(v);
  });

  // Start from an arbitrary node
  pq.decrease(g.nodes()[0], 0);

  var init = false;
  while (pq.size() > 0) {
    v = pq.removeMin();
    if (_.has(parents, v)) {
      result.setEdge(v, parents[v]);
    } else if (init) {
      throw new Error("Input graph is not connected: " + g);
    } else {
      init = true;
    }

    g.nodeEdges(v).forEach(updateNeighbors);
  }

  return result;
}

},{"../data/priority-queue":21,"../graph":22,"../lodash":25}],19:[function(require,module,exports){
var _ = require("../lodash");

module.exports = tarjan;

function tarjan(g) {
  var index = 0,
      stack = [],
      visited = {}, // node id -> { onStack, lowlink, index }
      results = [];

  function dfs(v) {
    var entry = visited[v] = {
      onStack: true,
      lowlink: index,
      index: index++
    };
    stack.push(v);

    g.successors(v).forEach(function(w) {
      if (!_.has(visited, w)) {
        dfs(w);
        entry.lowlink = Math.min(entry.lowlink, visited[w].lowlink);
      } else if (visited[w].onStack) {
        entry.lowlink = Math.min(entry.lowlink, visited[w].index);
      }
    });

    if (entry.lowlink === entry.index) {
      var cmpt = [],
          w;
      do {
        w = stack.pop();
        visited[w].onStack = false;
        cmpt.push(w);
      } while (v !== w);
      results.push(cmpt);
    }
  }

  g.nodes().forEach(function(v) {
    if (!_.has(visited, v)) {
      dfs(v);
    }
  });

  return results;
}

},{"../lodash":25}],20:[function(require,module,exports){
var _ = require("../lodash");

module.exports = topsort;
topsort.CycleException = CycleException;

function topsort(g) {
  var visited = {},
      stack = {},
      results = [];

  function visit(node) {
    if (_.has(stack, node)) {
      throw new CycleException();
    }

    if (!_.has(visited, node)) {
      stack[node] = true;
      visited[node] = true;
      _.each(g.predecessors(node), visit);
      delete stack[node];
      results.push(node);
    }
  }

  _.each(g.sinks(), visit);

  if (_.size(visited) !== g.nodeCount()) {
    throw new CycleException();
  }

  return results;
}

function CycleException() {}

},{"../lodash":25}],21:[function(require,module,exports){
var _ = require("../lodash");

module.exports = PriorityQueue;

/**
 * A min-priority queue data structure. This algorithm is derived from Cormen,
 * et al., "Introduction to Algorithms". The basic idea of a min-priority
 * queue is that you can efficiently (in O(1) time) get the smallest key in
 * the queue. Adding and removing elements takes O(log n) time. A key can
 * have its priority decreased in O(log n) time.
 */
function PriorityQueue() {
  this._arr = [];
  this._keyIndices = {};
}

/**
 * Returns the number of elements in the queue. Takes `O(1)` time.
 */
PriorityQueue.prototype.size = function() {
  return this._arr.length;
};

/**
 * Returns the keys that are in the queue. Takes `O(n)` time.
 */
PriorityQueue.prototype.keys = function() {
  return this._arr.map(function(x) { return x.key; });
};

/**
 * Returns `true` if **key** is in the queue and `false` if not.
 */
PriorityQueue.prototype.has = function(key) {
  return _.has(this._keyIndices, key);
};

/**
 * Returns the priority for **key**. If **key** is not present in the queue
 * then this function returns `undefined`. Takes `O(1)` time.
 *
 * @param {Object} key
 */
PriorityQueue.prototype.priority = function(key) {
  var index = this._keyIndices[key];
  if (index !== undefined) {
    return this._arr[index].priority;
  }
};

/**
 * Returns the key for the minimum element in this queue. If the queue is
 * empty this function throws an Error. Takes `O(1)` time.
 */
PriorityQueue.prototype.min = function() {
  if (this.size() === 0) {
    throw new Error("Queue underflow");
  }
  return this._arr[0].key;
};

/**
 * Inserts a new key into the priority queue. If the key already exists in
 * the queue this function returns `false`; otherwise it will return `true`.
 * Takes `O(n)` time.
 *
 * @param {Object} key the key to add
 * @param {Number} priority the initial priority for the key
 */
PriorityQueue.prototype.add = function(key, priority) {
  var keyIndices = this._keyIndices;
  key = String(key);
  if (!_.has(keyIndices, key)) {
    var arr = this._arr;
    var index = arr.length;
    keyIndices[key] = index;
    arr.push({key: key, priority: priority});
    this._decrease(index);
    return true;
  }
  return false;
};

/**
 * Removes and returns the smallest key in the queue. Takes `O(log n)` time.
 */
PriorityQueue.prototype.removeMin = function() {
  this._swap(0, this._arr.length - 1);
  var min = this._arr.pop();
  delete this._keyIndices[min.key];
  this._heapify(0);
  return min.key;
};

/**
 * Decreases the priority for **key** to **priority**. If the new priority is
 * greater than the previous priority, this function will throw an Error.
 *
 * @param {Object} key the key for which to raise priority
 * @param {Number} priority the new priority for the key
 */
PriorityQueue.prototype.decrease = function(key, priority) {
  var index = this._keyIndices[key];
  if (priority > this._arr[index].priority) {
    throw new Error("New priority is greater than current priority. " +
        "Key: " + key + " Old: " + this._arr[index].priority + " New: " + priority);
  }
  this._arr[index].priority = priority;
  this._decrease(index);
};

PriorityQueue.prototype._heapify = function(i) {
  var arr = this._arr;
  var l = 2 * i,
      r = l + 1,
      largest = i;
  if (l < arr.length) {
    largest = arr[l].priority < arr[largest].priority ? l : largest;
    if (r < arr.length) {
      largest = arr[r].priority < arr[largest].priority ? r : largest;
    }
    if (largest !== i) {
      this._swap(i, largest);
      this._heapify(largest);
    }
  }
};

PriorityQueue.prototype._decrease = function(index) {
  var arr = this._arr;
  var priority = arr[index].priority;
  var parent;
  while (index !== 0) {
    parent = index >> 1;
    if (arr[parent].priority < priority) {
      break;
    }
    this._swap(index, parent);
    index = parent;
  }
};

PriorityQueue.prototype._swap = function(i, j) {
  var arr = this._arr;
  var keyIndices = this._keyIndices;
  var origArrI = arr[i];
  var origArrJ = arr[j];
  arr[i] = origArrJ;
  arr[j] = origArrI;
  keyIndices[origArrJ.key] = i;
  keyIndices[origArrI.key] = j;
};

},{"../lodash":25}],22:[function(require,module,exports){
"use strict";

var _ = require("./lodash");

module.exports = Graph;

var DEFAULT_EDGE_NAME = "\x00",
    GRAPH_NODE = "\x00",
    EDGE_KEY_DELIM = "\x01";

// Implementation notes:
//
//  * Node id query functions should return string ids for the nodes
//  * Edge id query functions should return an "edgeObj", edge object, that is
//    composed of enough information to uniquely identify an edge: {v, w, name}.
//  * Internally we use an "edgeId", a stringified form of the edgeObj, to
//    reference edges. This is because we need a performant way to look these
//    edges up and, object properties, which have string keys, are the closest
//    we're going to get to a performant hashtable in JavaScript.

function Graph(opts) {
  this._isDirected = _.has(opts, "directed") ? opts.directed : true;
  this._isMultigraph = _.has(opts, "multigraph") ? opts.multigraph : false;
  this._isCompound = _.has(opts, "compound") ? opts.compound : false;

  // Label for the graph itself
  this._label = undefined;

  // Defaults to be set when creating a new node
  this._defaultNodeLabelFn = _.constant(undefined);

  // Defaults to be set when creating a new edge
  this._defaultEdgeLabelFn = _.constant(undefined);

  // v -> label
  this._nodes = {};

  if (this._isCompound) {
    // v -> parent
    this._parent = {};

    // v -> children
    this._children = {};
    this._children[GRAPH_NODE] = {};
  }

  // v -> edgeObj
  this._in = {};

  // u -> v -> Number
  this._preds = {};

  // v -> edgeObj
  this._out = {};

  // v -> w -> Number
  this._sucs = {};

  // e -> edgeObj
  this._edgeObjs = {};

  // e -> label
  this._edgeLabels = {};
}

/* Number of nodes in the graph. Should only be changed by the implementation. */
Graph.prototype._nodeCount = 0;

/* Number of edges in the graph. Should only be changed by the implementation. */
Graph.prototype._edgeCount = 0;


/* === Graph functions ========= */

Graph.prototype.isDirected = function() {
  return this._isDirected;
};

Graph.prototype.isMultigraph = function() {
  return this._isMultigraph;
};

Graph.prototype.isCompound = function() {
  return this._isCompound;
};

Graph.prototype.setGraph = function(label) {
  this._label = label;
  return this;
};

Graph.prototype.graph = function() {
  return this._label;
};


/* === Node functions ========== */

Graph.prototype.setDefaultNodeLabel = function(newDefault) {
  if (!_.isFunction(newDefault)) {
    newDefault = _.constant(newDefault);
  }
  this._defaultNodeLabelFn = newDefault;
  return this;
};

Graph.prototype.nodeCount = function() {
  return this._nodeCount;
};

Graph.prototype.nodes = function() {
  return _.keys(this._nodes);
};

Graph.prototype.sources = function() {
  var self = this;
  return _.filter(this.nodes(), function(v) {
    return _.isEmpty(self._in[v]);
  });
};

Graph.prototype.sinks = function() {
  var self = this;
  return _.filter(this.nodes(), function(v) {
    return _.isEmpty(self._out[v]);
  });
};

Graph.prototype.setNodes = function(vs, value) {
  var args = arguments;
  var self = this;
  _.each(vs, function(v) {
    if (args.length > 1) {
      self.setNode(v, value);
    } else {
      self.setNode(v);
    }
  });
  return this;
};

Graph.prototype.setNode = function(v, value) {
  if (_.has(this._nodes, v)) {
    if (arguments.length > 1) {
      this._nodes[v] = value;
    }
    return this;
  }

  this._nodes[v] = arguments.length > 1 ? value : this._defaultNodeLabelFn(v);
  if (this._isCompound) {
    this._parent[v] = GRAPH_NODE;
    this._children[v] = {};
    this._children[GRAPH_NODE][v] = true;
  }
  this._in[v] = {};
  this._preds[v] = {};
  this._out[v] = {};
  this._sucs[v] = {};
  ++this._nodeCount;
  return this;
};

Graph.prototype.node = function(v) {
  return this._nodes[v];
};

Graph.prototype.hasNode = function(v) {
  return _.has(this._nodes, v);
};

Graph.prototype.removeNode =  function(v) {
  var self = this;
  if (_.has(this._nodes, v)) {
    var removeEdge = function(e) { self.removeEdge(self._edgeObjs[e]); };
    delete this._nodes[v];
    if (this._isCompound) {
      this._removeFromParentsChildList(v);
      delete this._parent[v];
      _.each(this.children(v), function(child) {
        self.setParent(child);
      });
      delete this._children[v];
    }
    _.each(_.keys(this._in[v]), removeEdge);
    delete this._in[v];
    delete this._preds[v];
    _.each(_.keys(this._out[v]), removeEdge);
    delete this._out[v];
    delete this._sucs[v];
    --this._nodeCount;
  }
  return this;
};

Graph.prototype.setParent = function(v, parent) {
  if (!this._isCompound) {
    throw new Error("Cannot set parent in a non-compound graph");
  }

  if (_.isUndefined(parent)) {
    parent = GRAPH_NODE;
  } else {
    // Coerce parent to string
    parent += "";
    for (var ancestor = parent;
         !_.isUndefined(ancestor);
         ancestor = this.parent(ancestor)) {
      if (ancestor === v) {
        throw new Error("Setting " + parent+ " as parent of " + v +
                        " would create a cycle");
      }
    }

    this.setNode(parent);
  }

  this.setNode(v);
  this._removeFromParentsChildList(v);
  this._parent[v] = parent;
  this._children[parent][v] = true;
  return this;
};

Graph.prototype._removeFromParentsChildList = function(v) {
  delete this._children[this._parent[v]][v];
};

Graph.prototype.parent = function(v) {
  if (this._isCompound) {
    var parent = this._parent[v];
    if (parent !== GRAPH_NODE) {
      return parent;
    }
  }
};

Graph.prototype.children = function(v) {
  if (_.isUndefined(v)) {
    v = GRAPH_NODE;
  }

  if (this._isCompound) {
    var children = this._children[v];
    if (children) {
      return _.keys(children);
    }
  } else if (v === GRAPH_NODE) {
    return this.nodes();
  } else if (this.hasNode(v)) {
    return [];
  }
};

Graph.prototype.predecessors = function(v) {
  var predsV = this._preds[v];
  if (predsV) {
    return _.keys(predsV);
  }
};

Graph.prototype.successors = function(v) {
  var sucsV = this._sucs[v];
  if (sucsV) {
    return _.keys(sucsV);
  }
};

Graph.prototype.neighbors = function(v) {
  var preds = this.predecessors(v);
  if (preds) {
    return _.union(preds, this.successors(v));
  }
};

Graph.prototype.isLeaf = function (v) {
  var neighbors;
  if (this.isDirected()) {
    neighbors = this.successors(v);
  } else {
    neighbors = this.neighbors(v);
  }
  return neighbors.length === 0;
};

Graph.prototype.filterNodes = function(filter) {
  var copy = new this.constructor({
    directed: this._isDirected,
    multigraph: this._isMultigraph,
    compound: this._isCompound
  });

  copy.setGraph(this.graph());

  var self = this;
  _.each(this._nodes, function(value, v) {
    if (filter(v)) {
      copy.setNode(v, value);
    }
  });

  _.each(this._edgeObjs, function(e) {
    if (copy.hasNode(e.v) && copy.hasNode(e.w)) {
      copy.setEdge(e, self.edge(e));
    }
  });

  var parents = {};
  function findParent(v) {
    var parent = self.parent(v);
    if (parent === undefined || copy.hasNode(parent)) {
      parents[v] = parent;
      return parent;
    } else if (parent in parents) {
      return parents[parent];
    } else {
      return findParent(parent);
    }
  }

  if (this._isCompound) {
    _.each(copy.nodes(), function(v) {
      copy.setParent(v, findParent(v));
    });
  }

  return copy;
};

/* === Edge functions ========== */

Graph.prototype.setDefaultEdgeLabel = function(newDefault) {
  if (!_.isFunction(newDefault)) {
    newDefault = _.constant(newDefault);
  }
  this._defaultEdgeLabelFn = newDefault;
  return this;
};

Graph.prototype.edgeCount = function() {
  return this._edgeCount;
};

Graph.prototype.edges = function() {
  return _.values(this._edgeObjs);
};

Graph.prototype.setPath = function(vs, value) {
  var self = this,
      args = arguments;
  _.reduce(vs, function(v, w) {
    if (args.length > 1) {
      self.setEdge(v, w, value);
    } else {
      self.setEdge(v, w);
    }
    return w;
  });
  return this;
};

/*
 * setEdge(v, w, [value, [name]])
 * setEdge({ v, w, [name] }, [value])
 */
Graph.prototype.setEdge = function() {
  var v, w, name, value,
      valueSpecified = false,
      arg0 = arguments[0];

  if (typeof arg0 === "object" && arg0 !== null && "v" in arg0) {
    v = arg0.v;
    w = arg0.w;
    name = arg0.name;
    if (arguments.length === 2) {
      value = arguments[1];
      valueSpecified = true;
    }
  } else {
    v = arg0;
    w = arguments[1];
    name = arguments[3];
    if (arguments.length > 2) {
      value = arguments[2];
      valueSpecified = true;
    }
  }

  v = "" + v;
  w = "" + w;
  if (!_.isUndefined(name)) {
    name = "" + name;
  }

  var e = edgeArgsToId(this._isDirected, v, w, name);
  if (_.has(this._edgeLabels, e)) {
    if (valueSpecified) {
      this._edgeLabels[e] = value;
    }
    return this;
  }

  if (!_.isUndefined(name) && !this._isMultigraph) {
    throw new Error("Cannot set a named edge when isMultigraph = false");
  }

  // It didn't exist, so we need to create it.
  // First ensure the nodes exist.
  this.setNode(v);
  this.setNode(w);

  this._edgeLabels[e] = valueSpecified ? value : this._defaultEdgeLabelFn(v, w, name);

  var edgeObj = edgeArgsToObj(this._isDirected, v, w, name);
  // Ensure we add undirected edges in a consistent way.
  v = edgeObj.v;
  w = edgeObj.w;

  Object.freeze(edgeObj);
  this._edgeObjs[e] = edgeObj;
  incrementOrInitEntry(this._preds[w], v);
  incrementOrInitEntry(this._sucs[v], w);
  this._in[w][e] = edgeObj;
  this._out[v][e] = edgeObj;
  this._edgeCount++;
  return this;
};

Graph.prototype.edge = function(v, w, name) {
  var e = (arguments.length === 1
            ? edgeObjToId(this._isDirected, arguments[0])
            : edgeArgsToId(this._isDirected, v, w, name));
  return this._edgeLabels[e];
};

Graph.prototype.hasEdge = function(v, w, name) {
  var e = (arguments.length === 1
            ? edgeObjToId(this._isDirected, arguments[0])
            : edgeArgsToId(this._isDirected, v, w, name));
  return _.has(this._edgeLabels, e);
};

Graph.prototype.removeEdge = function(v, w, name) {
  var e = (arguments.length === 1
            ? edgeObjToId(this._isDirected, arguments[0])
            : edgeArgsToId(this._isDirected, v, w, name)),
      edge = this._edgeObjs[e];
  if (edge) {
    v = edge.v;
    w = edge.w;
    delete this._edgeLabels[e];
    delete this._edgeObjs[e];
    decrementOrRemoveEntry(this._preds[w], v);
    decrementOrRemoveEntry(this._sucs[v], w);
    delete this._in[w][e];
    delete this._out[v][e];
    this._edgeCount--;
  }
  return this;
};

Graph.prototype.inEdges = function(v, u) {
  var inV = this._in[v];
  if (inV) {
    var edges = _.values(inV);
    if (!u) {
      return edges;
    }
    return _.filter(edges, function(edge) { return edge.v === u; });
  }
};

Graph.prototype.outEdges = function(v, w) {
  var outV = this._out[v];
  if (outV) {
    var edges = _.values(outV);
    if (!w) {
      return edges;
    }
    return _.filter(edges, function(edge) { return edge.w === w; });
  }
};

Graph.prototype.nodeEdges = function(v, w) {
  var inEdges = this.inEdges(v, w);
  if (inEdges) {
    return inEdges.concat(this.outEdges(v, w));
  }
};

function incrementOrInitEntry(map, k) {
  if (map[k]) {
    map[k]++;
  } else {
    map[k] = 1;
  }
}

function decrementOrRemoveEntry(map, k) {
  if (!--map[k]) { delete map[k]; }
}

function edgeArgsToId(isDirected, v_, w_, name) {
  var v = "" + v_;
  var w = "" + w_;
  if (!isDirected && v > w) {
    var tmp = v;
    v = w;
    w = tmp;
  }
  return v + EDGE_KEY_DELIM + w + EDGE_KEY_DELIM +
             (_.isUndefined(name) ? DEFAULT_EDGE_NAME : name);
}

function edgeArgsToObj(isDirected, v_, w_, name) {
  var v = "" + v_;
  var w = "" + w_;
  if (!isDirected && v > w) {
    var tmp = v;
    v = w;
    w = tmp;
  }
  var edgeObj =  { v: v, w: w };
  if (name) {
    edgeObj.name = name;
  }
  return edgeObj;
}

function edgeObjToId(isDirected, edgeObj) {
  return edgeArgsToId(isDirected, edgeObj.v, edgeObj.w, edgeObj.name);
}

},{"./lodash":25}],23:[function(require,module,exports){
// Includes only the "core" of graphlib
module.exports = {
  Graph: require("./graph"),
  version: require("./version")
};

},{"./graph":22,"./version":26}],24:[function(require,module,exports){
var _ = require("./lodash"),
    Graph = require("./graph");

module.exports = {
  write: write,
  read: read
};

function write(g) {
  var json = {
    options: {
      directed: g.isDirected(),
      multigraph: g.isMultigraph(),
      compound: g.isCompound()
    },
    nodes: writeNodes(g),
    edges: writeEdges(g)
  };
  if (!_.isUndefined(g.graph())) {
    json.value = _.clone(g.graph());
  }
  return json;
}

function writeNodes(g) {
  return _.map(g.nodes(), function(v) {
    var nodeValue = g.node(v),
        parent = g.parent(v),
        node = { v: v };
    if (!_.isUndefined(nodeValue)) {
      node.value = nodeValue;
    }
    if (!_.isUndefined(parent)) {
      node.parent = parent;
    }
    return node;
  });
}

function writeEdges(g) {
  return _.map(g.edges(), function(e) {
    var edgeValue = g.edge(e),
        edge = { v: e.v, w: e.w };
    if (!_.isUndefined(e.name)) {
      edge.name = e.name;
    }
    if (!_.isUndefined(edgeValue)) {
      edge.value = edgeValue;
    }
    return edge;
  });
}

function read(json) {
  var g = new Graph(json.options).setGraph(json.value);
  _.each(json.nodes, function(entry) {
    g.setNode(entry.v, entry.value);
    if (entry.parent) {
      g.setParent(entry.v, entry.parent);
    }
  });
  _.each(json.edges, function(entry) {
    g.setEdge({ v: entry.v, w: entry.w, name: entry.name }, entry.value);
  });
  return g;
}

},{"./graph":22,"./lodash":25}],25:[function(require,module,exports){
/* global window */

var lodash;

if (typeof require === "function") {
  try {
    lodash = require("lodash");
  } catch (e) {}
}

if (!lodash) {
  lodash = window._;
}

module.exports = lodash;

},{"lodash":87}],26:[function(require,module,exports){
module.exports = '2.1.5';

},{}],27:[function(require,module,exports){
'use strict';


var yaml = require('./lib/js-yaml.js');


module.exports = yaml;

},{"./lib/js-yaml.js":28}],28:[function(require,module,exports){
'use strict';


var loader = require('./js-yaml/loader');
var dumper = require('./js-yaml/dumper');


function deprecated(name) {
  return function () {
    throw new Error('Function ' + name + ' is deprecated and cannot be used.');
  };
}


module.exports.Type                = require('./js-yaml/type');
module.exports.Schema              = require('./js-yaml/schema');
module.exports.FAILSAFE_SCHEMA     = require('./js-yaml/schema/failsafe');
module.exports.JSON_SCHEMA         = require('./js-yaml/schema/json');
module.exports.CORE_SCHEMA         = require('./js-yaml/schema/core');
module.exports.DEFAULT_SAFE_SCHEMA = require('./js-yaml/schema/default_safe');
module.exports.DEFAULT_FULL_SCHEMA = require('./js-yaml/schema/default_full');
module.exports.load                = loader.load;
module.exports.loadAll             = loader.loadAll;
module.exports.safeLoad            = loader.safeLoad;
module.exports.safeLoadAll         = loader.safeLoadAll;
module.exports.dump                = dumper.dump;
module.exports.safeDump            = dumper.safeDump;
module.exports.YAMLException       = require('./js-yaml/exception');

// Deprecated schema names from JS-YAML 2.0.x
module.exports.MINIMAL_SCHEMA = require('./js-yaml/schema/failsafe');
module.exports.SAFE_SCHEMA    = require('./js-yaml/schema/default_safe');
module.exports.DEFAULT_SCHEMA = require('./js-yaml/schema/default_full');

// Deprecated functions from JS-YAML 1.x.x
module.exports.scan           = deprecated('scan');
module.exports.parse          = deprecated('parse');
module.exports.compose        = deprecated('compose');
module.exports.addConstructor = deprecated('addConstructor');

},{"./js-yaml/dumper":30,"./js-yaml/exception":31,"./js-yaml/loader":32,"./js-yaml/schema":34,"./js-yaml/schema/core":35,"./js-yaml/schema/default_full":36,"./js-yaml/schema/default_safe":37,"./js-yaml/schema/failsafe":38,"./js-yaml/schema/json":39,"./js-yaml/type":40}],29:[function(require,module,exports){
'use strict';


function isNothing(subject) {
  return (typeof subject === 'undefined') || (subject === null);
}


function isObject(subject) {
  return (typeof subject === 'object') && (subject !== null);
}


function toArray(sequence) {
  if (Array.isArray(sequence)) return sequence;
  else if (isNothing(sequence)) return [];

  return [ sequence ];
}


function extend(target, source) {
  var index, length, key, sourceKeys;

  if (source) {
    sourceKeys = Object.keys(source);

    for (index = 0, length = sourceKeys.length; index < length; index += 1) {
      key = sourceKeys[index];
      target[key] = source[key];
    }
  }

  return target;
}


function repeat(string, count) {
  var result = '', cycle;

  for (cycle = 0; cycle < count; cycle += 1) {
    result += string;
  }

  return result;
}


function isNegativeZero(number) {
  return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number);
}


module.exports.isNothing      = isNothing;
module.exports.isObject       = isObject;
module.exports.toArray        = toArray;
module.exports.repeat         = repeat;
module.exports.isNegativeZero = isNegativeZero;
module.exports.extend         = extend;

},{}],30:[function(require,module,exports){
'use strict';

/*eslint-disable no-use-before-define*/

var common              = require('./common');
var YAMLException       = require('./exception');
var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');

var _toString       = Object.prototype.toString;
var _hasOwnProperty = Object.prototype.hasOwnProperty;

var CHAR_TAB                  = 0x09; /* Tab */
var CHAR_LINE_FEED            = 0x0A; /* LF */
var CHAR_SPACE                = 0x20; /* Space */
var CHAR_EXCLAMATION          = 0x21; /* ! */
var CHAR_DOUBLE_QUOTE         = 0x22; /* " */
var CHAR_SHARP                = 0x23; /* # */
var CHAR_PERCENT              = 0x25; /* % */
var CHAR_AMPERSAND            = 0x26; /* & */
var CHAR_SINGLE_QUOTE         = 0x27; /* ' */
var CHAR_ASTERISK             = 0x2A; /* * */
var CHAR_COMMA                = 0x2C; /* , */
var CHAR_MINUS                = 0x2D; /* - */
var CHAR_COLON                = 0x3A; /* : */
var CHAR_GREATER_THAN         = 0x3E; /* > */
var CHAR_QUESTION             = 0x3F; /* ? */
var CHAR_COMMERCIAL_AT        = 0x40; /* @ */
var CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */
var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
var CHAR_GRAVE_ACCENT         = 0x60; /* ` */
var CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */
var CHAR_VERTICAL_LINE        = 0x7C; /* | */
var CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */

var ESCAPE_SEQUENCES = {};

ESCAPE_SEQUENCES[0x00]   = '\\0';
ESCAPE_SEQUENCES[0x07]   = '\\a';
ESCAPE_SEQUENCES[0x08]   = '\\b';
ESCAPE_SEQUENCES[0x09]   = '\\t';
ESCAPE_SEQUENCES[0x0A]   = '\\n';
ESCAPE_SEQUENCES[0x0B]   = '\\v';
ESCAPE_SEQUENCES[0x0C]   = '\\f';
ESCAPE_SEQUENCES[0x0D]   = '\\r';
ESCAPE_SEQUENCES[0x1B]   = '\\e';
ESCAPE_SEQUENCES[0x22]   = '\\"';
ESCAPE_SEQUENCES[0x5C]   = '\\\\';
ESCAPE_SEQUENCES[0x85]   = '\\N';
ESCAPE_SEQUENCES[0xA0]   = '\\_';
ESCAPE_SEQUENCES[0x2028] = '\\L';
ESCAPE_SEQUENCES[0x2029] = '\\P';

var DEPRECATED_BOOLEANS_SYNTAX = [
  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
];

function compileStyleMap(schema, map) {
  var result, keys, index, length, tag, style, type;

  if (map === null) return {};

  result = {};
  keys = Object.keys(map);

  for (index = 0, length = keys.length; index < length; index += 1) {
    tag = keys[index];
    style = String(map[tag]);

    if (tag.slice(0, 2) === '!!') {
      tag = 'tag:yaml.org,2002:' + tag.slice(2);
    }
    type = schema.compiledTypeMap['fallback'][tag];

    if (type && _hasOwnProperty.call(type.styleAliases, style)) {
      style = type.styleAliases[style];
    }

    result[tag] = style;
  }

  return result;
}

function encodeHex(character) {
  var string, handle, length;

  string = character.toString(16).toUpperCase();

  if (character <= 0xFF) {
    handle = 'x';
    length = 2;
  } else if (character <= 0xFFFF) {
    handle = 'u';
    length = 4;
  } else if (character <= 0xFFFFFFFF) {
    handle = 'U';
    length = 8;
  } else {
    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');
  }

  return '\\' + handle + common.repeat('0', length - string.length) + string;
}

function State(options) {
  this.schema       = options['schema'] || DEFAULT_FULL_SCHEMA;
  this.indent       = Math.max(1, (options['indent'] || 2));
  this.skipInvalid  = options['skipInvalid'] || false;
  this.flowLevel    = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
  this.styleMap     = compileStyleMap(this.schema, options['styles'] || null);
  this.sortKeys     = options['sortKeys'] || false;
  this.lineWidth    = options['lineWidth'] || 80;
  this.noRefs       = options['noRefs'] || false;
  this.noCompatMode = options['noCompatMode'] || false;
  this.condenseFlow = options['condenseFlow'] || false;

  this.implicitTypes = this.schema.compiledImplicit;
  this.explicitTypes = this.schema.compiledExplicit;

  this.tag = null;
  this.result = '';

  this.duplicates = [];
  this.usedDuplicates = null;
}

// Indents every line in a string. Empty lines (\n only) are not indented.
function indentString(string, spaces) {
  var ind = common.repeat(' ', spaces),
      position = 0,
      next = -1,
      result = '',
      line,
      length = string.length;

  while (position < length) {
    next = string.indexOf('\n', position);
    if (next === -1) {
      line = string.slice(position);
      position = length;
    } else {
      line = string.slice(position, next + 1);
      position = next + 1;
    }

    if (line.length && line !== '\n') result += ind;

    result += line;
  }

  return result;
}

function generateNextLine(state, level) {
  return '\n' + common.repeat(' ', state.indent * level);
}

function testImplicitResolving(state, str) {
  var index, length, type;

  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {
    type = state.implicitTypes[index];

    if (type.resolve(str)) {
      return true;
    }
  }

  return false;
}

// [33] s-white ::= s-space | s-tab
function isWhitespace(c) {
  return c === CHAR_SPACE || c === CHAR_TAB;
}

// Returns true if the character can be printed without escaping.
// From YAML 1.2: "any allowed characters known to be non-printable
// should also be escaped. [However,] This isn’t mandatory"
// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
function isPrintable(c) {
  return  (0x00020 <= c && c <= 0x00007E)
      || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)
      || ((0x0E000 <= c && c <= 0x00FFFD) && c !== 0xFEFF /* BOM */)
      ||  (0x10000 <= c && c <= 0x10FFFF);
}

// Simplified test for values allowed after the first character in plain style.
function isPlainSafe(c) {
  // Uses a subset of nb-char - c-flow-indicator - ":" - "#"
  // where nb-char ::= c-printable - b-char - c-byte-order-mark.
  return isPrintable(c) && c !== 0xFEFF
    // - c-flow-indicator
    && c !== CHAR_COMMA
    && c !== CHAR_LEFT_SQUARE_BRACKET
    && c !== CHAR_RIGHT_SQUARE_BRACKET
    && c !== CHAR_LEFT_CURLY_BRACKET
    && c !== CHAR_RIGHT_CURLY_BRACKET
    // - ":" - "#"
    && c !== CHAR_COLON
    && c !== CHAR_SHARP;
}

// Simplified test for values allowed as the first character in plain style.
function isPlainSafeFirst(c) {
  // Uses a subset of ns-char - c-indicator
  // where ns-char = nb-char - s-white.
  return isPrintable(c) && c !== 0xFEFF
    && !isWhitespace(c) // - s-white
    // - (c-indicator ::=
    // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
    && c !== CHAR_MINUS
    && c !== CHAR_QUESTION
    && c !== CHAR_COLON
    && c !== CHAR_COMMA
    && c !== CHAR_LEFT_SQUARE_BRACKET
    && c !== CHAR_RIGHT_SQUARE_BRACKET
    && c !== CHAR_LEFT_CURLY_BRACKET
    && c !== CHAR_RIGHT_CURLY_BRACKET
    // | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “"”
    && c !== CHAR_SHARP
    && c !== CHAR_AMPERSAND
    && c !== CHAR_ASTERISK
    && c !== CHAR_EXCLAMATION
    && c !== CHAR_VERTICAL_LINE
    && c !== CHAR_GREATER_THAN
    && c !== CHAR_SINGLE_QUOTE
    && c !== CHAR_DOUBLE_QUOTE
    // | “%” | “@” | “`”)
    && c !== CHAR_PERCENT
    && c !== CHAR_COMMERCIAL_AT
    && c !== CHAR_GRAVE_ACCENT;
}

var STYLE_PLAIN   = 1,
    STYLE_SINGLE  = 2,
    STYLE_LITERAL = 3,
    STYLE_FOLDED  = 4,
    STYLE_DOUBLE  = 5;

// Determines which scalar styles are possible and returns the preferred style.
// lineWidth = -1 => no limit.
// Pre-conditions: str.length > 0.
// Post-conditions:
//    STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
//    STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
//    STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
function chooseScalarStyle(string, singleLineOnly, indentPerLevel, lineWidth, testAmbiguousType) {
  var i;
  var char;
  var hasLineBreak = false;
  var hasFoldableLine = false; // only checked if shouldTrackWidth
  var shouldTrackWidth = lineWidth !== -1;
  var previousLineBreak = -1; // count the first line correctly
  var plain = isPlainSafeFirst(string.charCodeAt(0))
          && !isWhitespace(string.charCodeAt(string.length - 1));

  if (singleLineOnly) {
    // Case: no block styles.
    // Check for disallowed characters to rule out plain and single.
    for (i = 0; i < string.length; i++) {
      char = string.charCodeAt(i);
      if (!isPrintable(char)) {
        return STYLE_DOUBLE;
      }
      plain = plain && isPlainSafe(char);
    }
  } else {
    // Case: block styles permitted.
    for (i = 0; i < string.length; i++) {
      char = string.charCodeAt(i);
      if (char === CHAR_LINE_FEED) {
        hasLineBreak = true;
        // Check if any line can be folded.
        if (shouldTrackWidth) {
          hasFoldableLine = hasFoldableLine ||
            // Foldable line = too long, and not more-indented.
            (i - previousLineBreak - 1 > lineWidth &&
             string[previousLineBreak + 1] !== ' ');
          previousLineBreak = i;
        }
      } else if (!isPrintable(char)) {
        return STYLE_DOUBLE;
      }
      plain = plain && isPlainSafe(char);
    }
    // in case the end is missing a \n
    hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&
      (i - previousLineBreak - 1 > lineWidth &&
       string[previousLineBreak + 1] !== ' '));
  }
  // Although every style can represent \n without escaping, prefer block styles
  // for multiline, since they're more readable and they don't add empty lines.
  // Also prefer folding a super-long line.
  if (!hasLineBreak && !hasFoldableLine) {
    // Strings interpretable as another type have to be quoted;
    // e.g. the string 'true' vs. the boolean true.
    return plain && !testAmbiguousType(string)
      ? STYLE_PLAIN : STYLE_SINGLE;
  }
  // Edge case: block indentation indicator can only have one digit.
  if (string[0] === ' ' && indentPerLevel > 9) {
    return STYLE_DOUBLE;
  }
  // At this point we know block styles are valid.
  // Prefer literal style unless we want to fold.
  return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
}

// Note: line breaking/folding is implemented for only the folded style.
// NB. We drop the last trailing newline (if any) of a returned block scalar
//  since the dumper adds its own newline. This always works:
//    • No ending newline => unaffected; already using strip "-" chomping.
//    • Ending newline    => removed then restored.
//  Importantly, this keeps the "+" chomp indicator from gaining an extra line.
function writeScalar(state, string, level, iskey) {
  state.dump = (function () {
    if (string.length === 0) {
      return "''";
    }
    if (!state.noCompatMode &&
        DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1) {
      return "'" + string + "'";
    }

    var indent = state.indent * Math.max(1, level); // no 0-indent scalars
    // As indentation gets deeper, let the width decrease monotonically
    // to the lower bound min(state.lineWidth, 40).
    // Note that this implies
    //  state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
    //  state.lineWidth > 40 + state.indent: width decreases until the lower bound.
    // This behaves better than a constant minimum width which disallows narrower options,
    // or an indent threshold which causes the width to suddenly increase.
    var lineWidth = state.lineWidth === -1
      ? -1 : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);

    // Without knowing if keys are implicit/explicit, assume implicit for safety.
    var singleLineOnly = iskey
      // No block styles in flow mode.
      || (state.flowLevel > -1 && level >= state.flowLevel);
    function testAmbiguity(string) {
      return testImplicitResolving(state, string);
    }

    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth, testAmbiguity)) {
      case STYLE_PLAIN:
        return string;
      case STYLE_SINGLE:
        return "'" + string.replace(/'/g, "''") + "'";
      case STYLE_LITERAL:
        return '|' + blockHeader(string, state.indent)
          + dropEndingNewline(indentString(string, indent));
      case STYLE_FOLDED:
        return '>' + blockHeader(string, state.indent)
          + dropEndingNewline(indentString(foldString(string, lineWidth), indent));
      case STYLE_DOUBLE:
        return '"' + escapeString(string, lineWidth) + '"';
      default:
        throw new YAMLException('impossible error: invalid scalar style');
    }
  }());
}

// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
function blockHeader(string, indentPerLevel) {
  var indentIndicator = (string[0] === ' ') ? String(indentPerLevel) : '';

  // note the special case: the string '\n' counts as a "trailing" empty line.
  var clip =          string[string.length - 1] === '\n';
  var keep = clip && (string[string.length - 2] === '\n' || string === '\n');
  var chomp = keep ? '+' : (clip ? '' : '-');

  return indentIndicator + chomp + '\n';
}

// (See the note for writeScalar.)
function dropEndingNewline(string) {
  return string[string.length - 1] === '\n' ? string.slice(0, -1) : string;
}

// Note: a long line without a suitable break point will exceed the width limit.
// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
function foldString(string, width) {
  // In folded style, $k$ consecutive newlines output as $k+1$ newlines—
  // unless they're before or after a more-indented line, or at the very
  // beginning or end, in which case $k$ maps to $k$.
  // Therefore, parse each chunk as newline(s) followed by a content line.
  var lineRe = /(\n+)([^\n]*)/g;

  // first line (possibly an empty line)
  var result = (function () {
    var nextLF = string.indexOf('\n');
    nextLF = nextLF !== -1 ? nextLF : string.length;
    lineRe.lastIndex = nextLF;
    return foldLine(string.slice(0, nextLF), width);
  }());
  // If we haven't reached the first content line yet, don't add an extra \n.
  var prevMoreIndented = string[0] === '\n' || string[0] === ' ';
  var moreIndented;

  // rest of the lines
  var match;
  while ((match = lineRe.exec(string))) {
    var prefix = match[1], line = match[2];
    moreIndented = (line[0] === ' ');
    result += prefix
      + (!prevMoreIndented && !moreIndented && line !== ''
        ? '\n' : '')
      + foldLine(line, width);
    prevMoreIndented = moreIndented;
  }

  return result;
}

// Greedy line breaking.
// Picks the longest line under the limit each time,
// otherwise settles for the shortest line over the limit.
// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
function foldLine(line, width) {
  if (line === '' || line[0] === ' ') return line;

  // Since a more-indented line adds a \n, breaks can't be followed by a space.
  var breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
  var match;
  // start is an inclusive index. end, curr, and next are exclusive.
  var start = 0, end, curr = 0, next = 0;
  var result = '';

  // Invariants: 0 <= start <= length-1.
  //   0 <= curr <= next <= max(0, length-2). curr - start <= width.
  // Inside the loop:
  //   A match implies length >= 2, so curr and next are <= length-2.
  while ((match = breakRe.exec(line))) {
    next = match.index;
    // maintain invariant: curr - start <= width
    if (next - start > width) {
      end = (curr > start) ? curr : next; // derive end <= length-2
      result += '\n' + line.slice(start, end);
      // skip the space that was output as \n
      start = end + 1;                    // derive start <= length-1
    }
    curr = next;
  }

  // By the invariants, start <= length-1, so there is something left over.
  // It is either the whole string or a part starting from non-whitespace.
  result += '\n';
  // Insert a break if the remainder is too long and there is a break available.
  if (line.length - start > width && curr > start) {
    result += line.slice(start, curr) + '\n' + line.slice(curr + 1);
  } else {
    result += line.slice(start);
  }

  return result.slice(1); // drop extra \n joiner
}

// Escapes a double-quoted string.
function escapeString(string) {
  var result = '';
  var char, nextChar;
  var escapeSeq;

  for (var i = 0; i < string.length; i++) {
    char = string.charCodeAt(i);
    // Check for surrogate pairs (reference Unicode 3.0 section "3.7 Surrogates").
    if (char >= 0xD800 && char <= 0xDBFF/* high surrogate */) {
      nextChar = string.charCodeAt(i + 1);
      if (nextChar >= 0xDC00 && nextChar <= 0xDFFF/* low surrogate */) {
        // Combine the surrogate pair and store it escaped.
        result += encodeHex((char - 0xD800) * 0x400 + nextChar - 0xDC00 + 0x10000);
        // Advance index one extra since we already used that char here.
        i++; continue;
      }
    }
    escapeSeq = ESCAPE_SEQUENCES[char];
    result += !escapeSeq && isPrintable(char)
      ? string[i]
      : escapeSeq || encodeHex(char);
  }

  return result;
}

function writeFlowSequence(state, level, object) {
  var _result = '',
      _tag    = state.tag,
      index,
      length;

  for (index = 0, length = object.length; index < length; index += 1) {
    // Write only valid elements.
    if (writeNode(state, level, object[index], false, false)) {
      if (index !== 0) _result += ',' + (!state.condenseFlow ? ' ' : '');
      _result += state.dump;
    }
  }

  state.tag = _tag;
  state.dump = '[' + _result + ']';
}

function writeBlockSequence(state, level, object, compact) {
  var _result = '',
      _tag    = state.tag,
      index,
      length;

  for (index = 0, length = object.length; index < length; index += 1) {
    // Write only valid elements.
    if (writeNode(state, level + 1, object[index], true, true)) {
      if (!compact || index !== 0) {
        _result += generateNextLine(state, level);
      }

      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
        _result += '-';
      } else {
        _result += '- ';
      }

      _result += state.dump;
    }
  }

  state.tag = _tag;
  state.dump = _result || '[]'; // Empty sequence if no valid values.
}

function writeFlowMapping(state, level, object) {
  var _result       = '',
      _tag          = state.tag,
      objectKeyList = Object.keys(object),
      index,
      length,
      objectKey,
      objectValue,
      pairBuffer;

  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
    pairBuffer = state.condenseFlow ? '"' : '';

    if (index !== 0) pairBuffer += ', ';

    objectKey = objectKeyList[index];
    objectValue = object[objectKey];

    if (!writeNode(state, level, objectKey, false, false)) {
      continue; // Skip this pair because of invalid key;
    }

    if (state.dump.length > 1024) pairBuffer += '? ';

    pairBuffer += state.dump + (state.condenseFlow ? '"' : '') + ':' + (state.condenseFlow ? '' : ' ');

    if (!writeNode(state, level, objectValue, false, false)) {
      continue; // Skip this pair because of invalid value.
    }

    pairBuffer += state.dump;

    // Both key and value are valid.
    _result += pairBuffer;
  }

  state.tag = _tag;
  state.dump = '{' + _result + '}';
}

function writeBlockMapping(state, level, object, compact) {
  var _result       = '',
      _tag          = state.tag,
      objectKeyList = Object.keys(object),
      index,
      length,
      objectKey,
      objectValue,
      explicitPair,
      pairBuffer;

  // Allow sorting keys so that the output file is deterministic
  if (state.sortKeys === true) {
    // Default sorting
    objectKeyList.sort();
  } else if (typeof state.sortKeys === 'function') {
    // Custom sort function
    objectKeyList.sort(state.sortKeys);
  } else if (state.sortKeys) {
    // Something is wrong
    throw new YAMLException('sortKeys must be a boolean or a function');
  }

  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
    pairBuffer = '';

    if (!compact || index !== 0) {
      pairBuffer += generateNextLine(state, level);
    }

    objectKey = objectKeyList[index];
    objectValue = object[objectKey];

    if (!writeNode(state, level + 1, objectKey, true, true, true)) {
      continue; // Skip this pair because of invalid key.
    }

    explicitPair = (state.tag !== null && state.tag !== '?') ||
                   (state.dump && state.dump.length > 1024);

    if (explicitPair) {
      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
        pairBuffer += '?';
      } else {
        pairBuffer += '? ';
      }
    }

    pairBuffer += state.dump;

    if (explicitPair) {
      pairBuffer += generateNextLine(state, level);
    }

    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
      continue; // Skip this pair because of invalid value.
    }

    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
      pairBuffer += ':';
    } else {
      pairBuffer += ': ';
    }

    pairBuffer += state.dump;

    // Both key and value are valid.
    _result += pairBuffer;
  }

  state.tag = _tag;
  state.dump = _result || '{}'; // Empty mapping if no valid pairs.
}

function detectType(state, object, explicit) {
  var _result, typeList, index, length, type, style;

  typeList = explicit ? state.explicitTypes : state.implicitTypes;

  for (index = 0, length = typeList.length; index < length; index += 1) {
    type = typeList[index];

    if ((type.instanceOf  || type.predicate) &&
        (!type.instanceOf || ((typeof object === 'object') && (object instanceof type.instanceOf))) &&
        (!type.predicate  || type.predicate(object))) {

      state.tag = explicit ? type.tag : '?';

      if (type.represent) {
        style = state.styleMap[type.tag] || type.defaultStyle;

        if (_toString.call(type.represent) === '[object Function]') {
          _result = type.represent(object, style);
        } else if (_hasOwnProperty.call(type.represent, style)) {
          _result = type.represent[style](object, style);
        } else {
          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not "' + style + '" style');
        }

        state.dump = _result;
      }

      return true;
    }
  }

  return false;
}

// Serializes `object` and writes it to global `result`.
// Returns true on success, or false on invalid object.
//
function writeNode(state, level, object, block, compact, iskey) {
  state.tag = null;
  state.dump = object;

  if (!detectType(state, object, false)) {
    detectType(state, object, true);
  }

  var type = _toString.call(state.dump);

  if (block) {
    block = (state.flowLevel < 0 || state.flowLevel > level);
  }

  var objectOrArray = type === '[object Object]' || type === '[object Array]',
      duplicateIndex,
      duplicate;

  if (objectOrArray) {
    duplicateIndex = state.duplicates.indexOf(object);
    duplicate = duplicateIndex !== -1;
  }

  if ((state.tag !== null && state.tag !== '?') || duplicate || (state.indent !== 2 && level > 0)) {
    compact = false;
  }

  if (duplicate && state.usedDuplicates[duplicateIndex]) {
    state.dump = '*ref_' + duplicateIndex;
  } else {
    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
      state.usedDuplicates[duplicateIndex] = true;
    }
    if (type === '[object Object]') {
      if (block && (Object.keys(state.dump).length !== 0)) {
        writeBlockMapping(state, level, state.dump, compact);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + state.dump;
        }
      } else {
        writeFlowMapping(state, level, state.dump);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
        }
      }
    } else if (type === '[object Array]') {
      if (block && (state.dump.length !== 0)) {
        writeBlockSequence(state, level, state.dump, compact);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + state.dump;
        }
      } else {
        writeFlowSequence(state, level, state.dump);
        if (duplicate) {
          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
        }
      }
    } else if (type === '[object String]') {
      if (state.tag !== '?') {
        writeScalar(state, state.dump, level, iskey);
      }
    } else {
      if (state.skipInvalid) return false;
      throw new YAMLException('unacceptable kind of an object to dump ' + type);
    }

    if (state.tag !== null && state.tag !== '?') {
      state.dump = '!<' + state.tag + '> ' + state.dump;
    }
  }

  return true;
}

function getDuplicateReferences(object, state) {
  var objects = [],
      duplicatesIndexes = [],
      index,
      length;

  inspectNode(object, objects, duplicatesIndexes);

  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {
    state.duplicates.push(objects[duplicatesIndexes[index]]);
  }
  state.usedDuplicates = new Array(length);
}

function inspectNode(object, objects, duplicatesIndexes) {
  var objectKeyList,
      index,
      length;

  if (object !== null && typeof object === 'object') {
    index = objects.indexOf(object);
    if (index !== -1) {
      if (duplicatesIndexes.indexOf(index) === -1) {
        duplicatesIndexes.push(index);
      }
    } else {
      objects.push(object);

      if (Array.isArray(object)) {
        for (index = 0, length = object.length; index < length; index += 1) {
          inspectNode(object[index], objects, duplicatesIndexes);
        }
      } else {
        objectKeyList = Object.keys(object);

        for (index = 0, length = objectKeyList.length; index < length; index += 1) {
          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);
        }
      }
    }
  }
}

function dump(input, options) {
  options = options || {};

  var state = new State(options);

  if (!state.noRefs) getDuplicateReferences(input, state);

  if (writeNode(state, 0, input, true, true)) return state.dump + '\n';

  return '';
}

function safeDump(input, options) {
  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
}

module.exports.dump     = dump;
module.exports.safeDump = safeDump;

},{"./common":29,"./exception":31,"./schema/default_full":36,"./schema/default_safe":37}],31:[function(require,module,exports){
// YAML error class. http://stackoverflow.com/questions/8458984
//
'use strict';

function YAMLException(reason, mark) {
  // Super constructor
  Error.call(this);

  this.name = 'YAMLException';
  this.reason = reason;
  this.mark = mark;
  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');

  // Include stack trace in error object
  if (Error.captureStackTrace) {
    // Chrome and NodeJS
    Error.captureStackTrace(this, this.constructor);
  } else {
    // FF, IE 10+ and Safari 6+. Fallback for others
    this.stack = (new Error()).stack || '';
  }
}


// Inherit from Error
YAMLException.prototype = Object.create(Error.prototype);
YAMLException.prototype.constructor = YAMLException;


YAMLException.prototype.toString = function toString(compact) {
  var result = this.name + ': ';

  result += this.reason || '(unknown reason)';

  if (!compact && this.mark) {
    result += ' ' + this.mark.toString();
  }

  return result;
};


module.exports = YAMLException;

},{}],32:[function(require,module,exports){
'use strict';

/*eslint-disable max-len,no-use-before-define*/

var common              = require('./common');
var YAMLException       = require('./exception');
var Mark                = require('./mark');
var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
var DEFAULT_FULL_SCHEMA = require('./schema/default_full');


var _hasOwnProperty = Object.prototype.hasOwnProperty;


var CONTEXT_FLOW_IN   = 1;
var CONTEXT_FLOW_OUT  = 2;
var CONTEXT_BLOCK_IN  = 3;
var CONTEXT_BLOCK_OUT = 4;


var CHOMPING_CLIP  = 1;
var CHOMPING_STRIP = 2;
var CHOMPING_KEEP  = 3;


var PATTERN_NON_PRINTABLE         = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
var PATTERN_FLOW_INDICATORS       = /[,\[\]\{\}]/;
var PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\-]+!)$/i;
var PATTERN_TAG_URI               = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;


function is_EOL(c) {
  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);
}

function is_WHITE_SPACE(c) {
  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);
}

function is_WS_OR_EOL(c) {
  return (c === 0x09/* Tab */) ||
         (c === 0x20/* Space */) ||
         (c === 0x0A/* LF */) ||
         (c === 0x0D/* CR */);
}

function is_FLOW_INDICATOR(c) {
  return c === 0x2C/* , */ ||
         c === 0x5B/* [ */ ||
         c === 0x5D/* ] */ ||
         c === 0x7B/* { */ ||
         c === 0x7D/* } */;
}

function fromHexCode(c) {
  var lc;

  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
    return c - 0x30;
  }

  /*eslint-disable no-bitwise*/
  lc = c | 0x20;

  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {
    return lc - 0x61 + 10;
  }

  return -1;
}

function escapedHexLen(c) {
  if (c === 0x78/* x */) { return 2; }
  if (c === 0x75/* u */) { return 4; }
  if (c === 0x55/* U */) { return 8; }
  return 0;
}

function fromDecimalCode(c) {
  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
    return c - 0x30;
  }

  return -1;
}

function simpleEscapeSequence(c) {
  /* eslint-disable indent */
  return (c === 0x30/* 0 */) ? '\x00' :
        (c === 0x61/* a */) ? '\x07' :
        (c === 0x62/* b */) ? '\x08' :
        (c === 0x74/* t */) ? '\x09' :
        (c === 0x09/* Tab */) ? '\x09' :
        (c === 0x6E/* n */) ? '\x0A' :
        (c === 0x76/* v */) ? '\x0B' :
        (c === 0x66/* f */) ? '\x0C' :
        (c === 0x72/* r */) ? '\x0D' :
        (c === 0x65/* e */) ? '\x1B' :
        (c === 0x20/* Space */) ? ' ' :
        (c === 0x22/* " */) ? '\x22' :
        (c === 0x2F/* / */) ? '/' :
        (c === 0x5C/* \ */) ? '\x5C' :
        (c === 0x4E/* N */) ? '\x85' :
        (c === 0x5F/* _ */) ? '\xA0' :
        (c === 0x4C/* L */) ? '\u2028' :
        (c === 0x50/* P */) ? '\u2029' : '';
}

function charFromCodepoint(c) {
  if (c <= 0xFFFF) {
    return String.fromCharCode(c);
  }
  // Encode UTF-16 surrogate pair
  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF
  return String.fromCharCode(
    ((c - 0x010000) >> 10) + 0xD800,
    ((c - 0x010000) & 0x03FF) + 0xDC00
  );
}

var simpleEscapeCheck = new Array(256); // integer, for fast access
var simpleEscapeMap = new Array(256);
for (var i = 0; i < 256; i++) {
  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
  simpleEscapeMap[i] = simpleEscapeSequence(i);
}


function State(input, options) {
  this.input = input;

  this.filename  = options['filename']  || null;
  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;
  this.onWarning = options['onWarning'] || null;
  this.legacy    = options['legacy']    || false;
  this.json      = options['json']      || false;
  this.listener  = options['listener']  || null;

  this.implicitTypes = this.schema.compiledImplicit;
  this.typeMap       = this.schema.compiledTypeMap;

  this.length     = input.length;
  this.position   = 0;
  this.line       = 0;
  this.lineStart  = 0;
  this.lineIndent = 0;

  this.documents = [];

  /*
  this.version;
  this.checkLineBreaks;
  this.tagMap;
  this.anchorMap;
  this.tag;
  this.anchor;
  this.kind;
  this.result;*/

}


function generateError(state, message) {
  return new YAMLException(
    message,
    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));
}

function throwError(state, message) {
  throw generateError(state, message);
}

function throwWarning(state, message) {
  if (state.onWarning) {
    state.onWarning.call(null, generateError(state, message));
  }
}


var directiveHandlers = {

  YAML: function handleYamlDirective(state, name, args) {

    var match, major, minor;

    if (state.version !== null) {
      throwError(state, 'duplication of %YAML directive');
    }

    if (args.length !== 1) {
      throwError(state, 'YAML directive accepts exactly one argument');
    }

    match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);

    if (match === null) {
      throwError(state, 'ill-formed argument of the YAML directive');
    }

    major = parseInt(match[1], 10);
    minor = parseInt(match[2], 10);

    if (major !== 1) {
      throwError(state, 'unacceptable YAML version of the document');
    }

    state.version = args[0];
    state.checkLineBreaks = (minor < 2);

    if (minor !== 1 && minor !== 2) {
      throwWarning(state, 'unsupported YAML version of the document');
    }
  },

  TAG: function handleTagDirective(state, name, args) {

    var handle, prefix;

    if (args.length !== 2) {
      throwError(state, 'TAG directive accepts exactly two arguments');
    }

    handle = args[0];
    prefix = args[1];

    if (!PATTERN_TAG_HANDLE.test(handle)) {
      throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
    }

    if (_hasOwnProperty.call(state.tagMap, handle)) {
      throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
    }

    if (!PATTERN_TAG_URI.test(prefix)) {
      throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
    }

    state.tagMap[handle] = prefix;
  }
};


function captureSegment(state, start, end, checkJson) {
  var _position, _length, _character, _result;

  if (start < end) {
    _result = state.input.slice(start, end);

    if (checkJson) {
      for (_position = 0, _length = _result.length; _position < _length; _position += 1) {
        _character = _result.charCodeAt(_position);
        if (!(_character === 0x09 ||
              (0x20 <= _character && _character <= 0x10FFFF))) {
          throwError(state, 'expected valid JSON character');
        }
      }
    } else if (PATTERN_NON_PRINTABLE.test(_result)) {
      throwError(state, 'the stream contains non-printable characters');
    }

    state.result += _result;
  }
}

function mergeMappings(state, destination, source, overridableKeys) {
  var sourceKeys, key, index, quantity;

  if (!common.isObject(source)) {
    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
  }

  sourceKeys = Object.keys(source);

  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
    key = sourceKeys[index];

    if (!_hasOwnProperty.call(destination, key)) {
      destination[key] = source[key];
      overridableKeys[key] = true;
    }
  }
}

function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, startLine, startPos) {
  var index, quantity;

  keyNode = String(keyNode);

  if (_result === null) {
    _result = {};
  }

  if (keyTag === 'tag:yaml.org,2002:merge') {
    if (Array.isArray(valueNode)) {
      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
        mergeMappings(state, _result, valueNode[index], overridableKeys);
      }
    } else {
      mergeMappings(state, _result, valueNode, overridableKeys);
    }
  } else {
    if (!state.json &&
        !_hasOwnProperty.call(overridableKeys, keyNode) &&
        _hasOwnProperty.call(_result, keyNode)) {
      state.line = startLine || state.line;
      state.position = startPos || state.position;
      throwError(state, 'duplicated mapping key');
    }
    _result[keyNode] = valueNode;
    delete overridableKeys[keyNode];
  }

  return _result;
}

function readLineBreak(state) {
  var ch;

  ch = state.input.charCodeAt(state.position);

  if (ch === 0x0A/* LF */) {
    state.position++;
  } else if (ch === 0x0D/* CR */) {
    state.position++;
    if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {
      state.position++;
    }
  } else {
    throwError(state, 'a line break is expected');
  }

  state.line += 1;
  state.lineStart = state.position;
}

function skipSeparationSpace(state, allowComments, checkIndent) {
  var lineBreaks = 0,
      ch = state.input.charCodeAt(state.position);

  while (ch !== 0) {
    while (is_WHITE_SPACE(ch)) {
      ch = state.input.charCodeAt(++state.position);
    }

    if (allowComments && ch === 0x23/* # */) {
      do {
        ch = state.input.charCodeAt(++state.position);
      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);
    }

    if (is_EOL(ch)) {
      readLineBreak(state);

      ch = state.input.charCodeAt(state.position);
      lineBreaks++;
      state.lineIndent = 0;

      while (ch === 0x20/* Space */) {
        state.lineIndent++;
        ch = state.input.charCodeAt(++state.position);
      }
    } else {
      break;
    }
  }

  if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
    throwWarning(state, 'deficient indentation');
  }

  return lineBreaks;
}

function testDocumentSeparator(state) {
  var _position = state.position,
      ch;

  ch = state.input.charCodeAt(_position);

  // Condition state.position === state.lineStart is tested
  // in parent on each call, for efficiency. No needs to test here again.
  if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&
      ch === state.input.charCodeAt(_position + 1) &&
      ch === state.input.charCodeAt(_position + 2)) {

    _position += 3;

    ch = state.input.charCodeAt(_position);

    if (ch === 0 || is_WS_OR_EOL(ch)) {
      return true;
    }
  }

  return false;
}

function writeFoldedLines(state, count) {
  if (count === 1) {
    state.result += ' ';
  } else if (count > 1) {
    state.result += common.repeat('\n', count - 1);
  }
}


function readPlainScalar(state, nodeIndent, withinFlowCollection) {
  var preceding,
      following,
      captureStart,
      captureEnd,
      hasPendingContent,
      _line,
      _lineStart,
      _lineIndent,
      _kind = state.kind,
      _result = state.result,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (is_WS_OR_EOL(ch)      ||
      is_FLOW_INDICATOR(ch) ||
      ch === 0x23/* # */    ||
      ch === 0x26/* & */    ||
      ch === 0x2A/* * */    ||
      ch === 0x21/* ! */    ||
      ch === 0x7C/* | */    ||
      ch === 0x3E/* > */    ||
      ch === 0x27/* ' */    ||
      ch === 0x22/* " */    ||
      ch === 0x25/* % */    ||
      ch === 0x40/* @ */    ||
      ch === 0x60/* ` */) {
    return false;
  }

  if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {
    following = state.input.charCodeAt(state.position + 1);

    if (is_WS_OR_EOL(following) ||
        withinFlowCollection && is_FLOW_INDICATOR(following)) {
      return false;
    }
  }

  state.kind = 'scalar';
  state.result = '';
  captureStart = captureEnd = state.position;
  hasPendingContent = false;

  while (ch !== 0) {
    if (ch === 0x3A/* : */) {
      following = state.input.charCodeAt(state.position + 1);

      if (is_WS_OR_EOL(following) ||
          withinFlowCollection && is_FLOW_INDICATOR(following)) {
        break;
      }

    } else if (ch === 0x23/* # */) {
      preceding = state.input.charCodeAt(state.position - 1);

      if (is_WS_OR_EOL(preceding)) {
        break;
      }

    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||
               withinFlowCollection && is_FLOW_INDICATOR(ch)) {
      break;

    } else if (is_EOL(ch)) {
      _line = state.line;
      _lineStart = state.lineStart;
      _lineIndent = state.lineIndent;
      skipSeparationSpace(state, false, -1);

      if (state.lineIndent >= nodeIndent) {
        hasPendingContent = true;
        ch = state.input.charCodeAt(state.position);
        continue;
      } else {
        state.position = captureEnd;
        state.line = _line;
        state.lineStart = _lineStart;
        state.lineIndent = _lineIndent;
        break;
      }
    }

    if (hasPendingContent) {
      captureSegment(state, captureStart, captureEnd, false);
      writeFoldedLines(state, state.line - _line);
      captureStart = captureEnd = state.position;
      hasPendingContent = false;
    }

    if (!is_WHITE_SPACE(ch)) {
      captureEnd = state.position + 1;
    }

    ch = state.input.charCodeAt(++state.position);
  }

  captureSegment(state, captureStart, captureEnd, false);

  if (state.result) {
    return true;
  }

  state.kind = _kind;
  state.result = _result;
  return false;
}

function readSingleQuotedScalar(state, nodeIndent) {
  var ch,
      captureStart, captureEnd;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x27/* ' */) {
    return false;
  }

  state.kind = 'scalar';
  state.result = '';
  state.position++;
  captureStart = captureEnd = state.position;

  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
    if (ch === 0x27/* ' */) {
      captureSegment(state, captureStart, state.position, true);
      ch = state.input.charCodeAt(++state.position);

      if (ch === 0x27/* ' */) {
        captureStart = state.position;
        state.position++;
        captureEnd = state.position;
      } else {
        return true;
      }

    } else if (is_EOL(ch)) {
      captureSegment(state, captureStart, captureEnd, true);
      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
      captureStart = captureEnd = state.position;

    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
      throwError(state, 'unexpected end of the document within a single quoted scalar');

    } else {
      state.position++;
      captureEnd = state.position;
    }
  }

  throwError(state, 'unexpected end of the stream within a single quoted scalar');
}

function readDoubleQuotedScalar(state, nodeIndent) {
  var captureStart,
      captureEnd,
      hexLength,
      hexResult,
      tmp,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x22/* " */) {
    return false;
  }

  state.kind = 'scalar';
  state.result = '';
  state.position++;
  captureStart = captureEnd = state.position;

  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
    if (ch === 0x22/* " */) {
      captureSegment(state, captureStart, state.position, true);
      state.position++;
      return true;

    } else if (ch === 0x5C/* \ */) {
      captureSegment(state, captureStart, state.position, true);
      ch = state.input.charCodeAt(++state.position);

      if (is_EOL(ch)) {
        skipSeparationSpace(state, false, nodeIndent);

        // TODO: rework to inline fn with no type cast?
      } else if (ch < 256 && simpleEscapeCheck[ch]) {
        state.result += simpleEscapeMap[ch];
        state.position++;

      } else if ((tmp = escapedHexLen(ch)) > 0) {
        hexLength = tmp;
        hexResult = 0;

        for (; hexLength > 0; hexLength--) {
          ch = state.input.charCodeAt(++state.position);

          if ((tmp = fromHexCode(ch)) >= 0) {
            hexResult = (hexResult << 4) + tmp;

          } else {
            throwError(state, 'expected hexadecimal character');
          }
        }

        state.result += charFromCodepoint(hexResult);

        state.position++;

      } else {
        throwError(state, 'unknown escape sequence');
      }

      captureStart = captureEnd = state.position;

    } else if (is_EOL(ch)) {
      captureSegment(state, captureStart, captureEnd, true);
      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
      captureStart = captureEnd = state.position;

    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
      throwError(state, 'unexpected end of the document within a double quoted scalar');

    } else {
      state.position++;
      captureEnd = state.position;
    }
  }

  throwError(state, 'unexpected end of the stream within a double quoted scalar');
}

function readFlowCollection(state, nodeIndent) {
  var readNext = true,
      _line,
      _tag     = state.tag,
      _result,
      _anchor  = state.anchor,
      following,
      terminator,
      isPair,
      isExplicitPair,
      isMapping,
      overridableKeys = {},
      keyNode,
      keyTag,
      valueNode,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch === 0x5B/* [ */) {
    terminator = 0x5D;/* ] */
    isMapping = false;
    _result = [];
  } else if (ch === 0x7B/* { */) {
    terminator = 0x7D;/* } */
    isMapping = true;
    _result = {};
  } else {
    return false;
  }

  if (state.anchor !== null) {
    state.anchorMap[state.anchor] = _result;
  }

  ch = state.input.charCodeAt(++state.position);

  while (ch !== 0) {
    skipSeparationSpace(state, true, nodeIndent);

    ch = state.input.charCodeAt(state.position);

    if (ch === terminator) {
      state.position++;
      state.tag = _tag;
      state.anchor = _anchor;
      state.kind = isMapping ? 'mapping' : 'sequence';
      state.result = _result;
      return true;
    } else if (!readNext) {
      throwError(state, 'missed comma between flow collection entries');
    }

    keyTag = keyNode = valueNode = null;
    isPair = isExplicitPair = false;

    if (ch === 0x3F/* ? */) {
      following = state.input.charCodeAt(state.position + 1);

      if (is_WS_OR_EOL(following)) {
        isPair = isExplicitPair = true;
        state.position++;
        skipSeparationSpace(state, true, nodeIndent);
      }
    }

    _line = state.line;
    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
    keyTag = state.tag;
    keyNode = state.result;
    skipSeparationSpace(state, true, nodeIndent);

    ch = state.input.charCodeAt(state.position);

    if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {
      isPair = true;
      ch = state.input.charCodeAt(++state.position);
      skipSeparationSpace(state, true, nodeIndent);
      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
      valueNode = state.result;
    }

    if (isMapping) {
      storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
    } else if (isPair) {
      _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode));
    } else {
      _result.push(keyNode);
    }

    skipSeparationSpace(state, true, nodeIndent);

    ch = state.input.charCodeAt(state.position);

    if (ch === 0x2C/* , */) {
      readNext = true;
      ch = state.input.charCodeAt(++state.position);
    } else {
      readNext = false;
    }
  }

  throwError(state, 'unexpected end of the stream within a flow collection');
}

function readBlockScalar(state, nodeIndent) {
  var captureStart,
      folding,
      chomping       = CHOMPING_CLIP,
      didReadContent = false,
      detectedIndent = false,
      textIndent     = nodeIndent,
      emptyLines     = 0,
      atMoreIndented = false,
      tmp,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch === 0x7C/* | */) {
    folding = false;
  } else if (ch === 0x3E/* > */) {
    folding = true;
  } else {
    return false;
  }

  state.kind = 'scalar';
  state.result = '';

  while (ch !== 0) {
    ch = state.input.charCodeAt(++state.position);

    if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {
      if (CHOMPING_CLIP === chomping) {
        chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;
      } else {
        throwError(state, 'repeat of a chomping mode identifier');
      }

    } else if ((tmp = fromDecimalCode(ch)) >= 0) {
      if (tmp === 0) {
        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
      } else if (!detectedIndent) {
        textIndent = nodeIndent + tmp - 1;
        detectedIndent = true;
      } else {
        throwError(state, 'repeat of an indentation width identifier');
      }

    } else {
      break;
    }
  }

  if (is_WHITE_SPACE(ch)) {
    do { ch = state.input.charCodeAt(++state.position); }
    while (is_WHITE_SPACE(ch));

    if (ch === 0x23/* # */) {
      do { ch = state.input.charCodeAt(++state.position); }
      while (!is_EOL(ch) && (ch !== 0));
    }
  }

  while (ch !== 0) {
    readLineBreak(state);
    state.lineIndent = 0;

    ch = state.input.charCodeAt(state.position);

    while ((!detectedIndent || state.lineIndent < textIndent) &&
           (ch === 0x20/* Space */)) {
      state.lineIndent++;
      ch = state.input.charCodeAt(++state.position);
    }

    if (!detectedIndent && state.lineIndent > textIndent) {
      textIndent = state.lineIndent;
    }

    if (is_EOL(ch)) {
      emptyLines++;
      continue;
    }

    // End of the scalar.
    if (state.lineIndent < textIndent) {

      // Perform the chomping.
      if (chomping === CHOMPING_KEEP) {
        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
      } else if (chomping === CHOMPING_CLIP) {
        if (didReadContent) { // i.e. only if the scalar is not empty.
          state.result += '\n';
        }
      }

      // Break this `while` cycle and go to the funciton's epilogue.
      break;
    }

    // Folded style: use fancy rules to handle line breaks.
    if (folding) {

      // Lines starting with white space characters (more-indented lines) are not folded.
      if (is_WHITE_SPACE(ch)) {
        atMoreIndented = true;
        // except for the first content line (cf. Example 8.1)
        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);

      // End of more-indented block.
      } else if (atMoreIndented) {
        atMoreIndented = false;
        state.result += common.repeat('\n', emptyLines + 1);

      // Just one line break - perceive as the same line.
      } else if (emptyLines === 0) {
        if (didReadContent) { // i.e. only if we have already read some scalar content.
          state.result += ' ';
        }

      // Several line breaks - perceive as different lines.
      } else {
        state.result += common.repeat('\n', emptyLines);
      }

    // Literal style: just add exact number of line breaks between content lines.
    } else {
      // Keep all line breaks except the header line break.
      state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
    }

    didReadContent = true;
    detectedIndent = true;
    emptyLines = 0;
    captureStart = state.position;

    while (!is_EOL(ch) && (ch !== 0)) {
      ch = state.input.charCodeAt(++state.position);
    }

    captureSegment(state, captureStart, state.position, false);
  }

  return true;
}

function readBlockSequence(state, nodeIndent) {
  var _line,
      _tag      = state.tag,
      _anchor   = state.anchor,
      _result   = [],
      following,
      detected  = false,
      ch;

  if (state.anchor !== null) {
    state.anchorMap[state.anchor] = _result;
  }

  ch = state.input.charCodeAt(state.position);

  while (ch !== 0) {

    if (ch !== 0x2D/* - */) {
      break;
    }

    following = state.input.charCodeAt(state.position + 1);

    if (!is_WS_OR_EOL(following)) {
      break;
    }

    detected = true;
    state.position++;

    if (skipSeparationSpace(state, true, -1)) {
      if (state.lineIndent <= nodeIndent) {
        _result.push(null);
        ch = state.input.charCodeAt(state.position);
        continue;
      }
    }

    _line = state.line;
    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
    _result.push(state.result);
    skipSeparationSpace(state, true, -1);

    ch = state.input.charCodeAt(state.position);

    if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
      throwError(state, 'bad indentation of a sequence entry');
    } else if (state.lineIndent < nodeIndent) {
      break;
    }
  }

  if (detected) {
    state.tag = _tag;
    state.anchor = _anchor;
    state.kind = 'sequence';
    state.result = _result;
    return true;
  }
  return false;
}

function readBlockMapping(state, nodeIndent, flowIndent) {
  var following,
      allowCompact,
      _line,
      _pos,
      _tag          = state.tag,
      _anchor       = state.anchor,
      _result       = {},
      overridableKeys = {},
      keyTag        = null,
      keyNode       = null,
      valueNode     = null,
      atExplicitKey = false,
      detected      = false,
      ch;

  if (state.anchor !== null) {
    state.anchorMap[state.anchor] = _result;
  }

  ch = state.input.charCodeAt(state.position);

  while (ch !== 0) {
    following = state.input.charCodeAt(state.position + 1);
    _line = state.line; // Save the current line.
    _pos = state.position;

    //
    // Explicit notation case. There are two separate blocks:
    // first for the key (denoted by "?") and second for the value (denoted by ":")
    //
    if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {

      if (ch === 0x3F/* ? */) {
        if (atExplicitKey) {
          storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
          keyTag = keyNode = valueNode = null;
        }

        detected = true;
        atExplicitKey = true;
        allowCompact = true;

      } else if (atExplicitKey) {
        // i.e. 0x3A/* : */ === character after the explicit key.
        atExplicitKey = false;
        allowCompact = true;

      } else {
        throwError(state, 'incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line');
      }

      state.position += 1;
      ch = following;

    //
    // Implicit notation case. Flow-style node as the key first, then ":", and the value.
    //
    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {

      if (state.line === _line) {
        ch = state.input.charCodeAt(state.position);

        while (is_WHITE_SPACE(ch)) {
          ch = state.input.charCodeAt(++state.position);
        }

        if (ch === 0x3A/* : */) {
          ch = state.input.charCodeAt(++state.position);

          if (!is_WS_OR_EOL(ch)) {
            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');
          }

          if (atExplicitKey) {
            storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
            keyTag = keyNode = valueNode = null;
          }

          detected = true;
          atExplicitKey = false;
          allowCompact = false;
          keyTag = state.tag;
          keyNode = state.result;

        } else if (detected) {
          throwError(state, 'can not read an implicit mapping pair; a colon is missed');

        } else {
          state.tag = _tag;
          state.anchor = _anchor;
          return true; // Keep the result of `composeNode`.
        }

      } else if (detected) {
        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');

      } else {
        state.tag = _tag;
        state.anchor = _anchor;
        return true; // Keep the result of `composeNode`.
      }

    } else {
      break; // Reading is done. Go to the epilogue.
    }

    //
    // Common reading code for both explicit and implicit notations.
    //
    if (state.line === _line || state.lineIndent > nodeIndent) {
      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {
        if (atExplicitKey) {
          keyNode = state.result;
        } else {
          valueNode = state.result;
        }
      }

      if (!atExplicitKey) {
        storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, _line, _pos);
        keyTag = keyNode = valueNode = null;
      }

      skipSeparationSpace(state, true, -1);
      ch = state.input.charCodeAt(state.position);
    }

    if (state.lineIndent > nodeIndent && (ch !== 0)) {
      throwError(state, 'bad indentation of a mapping entry');
    } else if (state.lineIndent < nodeIndent) {
      break;
    }
  }

  //
  // Epilogue.
  //

  // Special case: last mapping's node contains only the key in explicit notation.
  if (atExplicitKey) {
    storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
  }

  // Expose the resulting mapping.
  if (detected) {
    state.tag = _tag;
    state.anchor = _anchor;
    state.kind = 'mapping';
    state.result = _result;
  }

  return detected;
}

function readTagProperty(state) {
  var _position,
      isVerbatim = false,
      isNamed    = false,
      tagHandle,
      tagName,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x21/* ! */) return false;

  if (state.tag !== null) {
    throwError(state, 'duplication of a tag property');
  }

  ch = state.input.charCodeAt(++state.position);

  if (ch === 0x3C/* < */) {
    isVerbatim = true;
    ch = state.input.charCodeAt(++state.position);

  } else if (ch === 0x21/* ! */) {
    isNamed = true;
    tagHandle = '!!';
    ch = state.input.charCodeAt(++state.position);

  } else {
    tagHandle = '!';
  }

  _position = state.position;

  if (isVerbatim) {
    do { ch = state.input.charCodeAt(++state.position); }
    while (ch !== 0 && ch !== 0x3E/* > */);

    if (state.position < state.length) {
      tagName = state.input.slice(_position, state.position);
      ch = state.input.charCodeAt(++state.position);
    } else {
      throwError(state, 'unexpected end of the stream within a verbatim tag');
    }
  } else {
    while (ch !== 0 && !is_WS_OR_EOL(ch)) {

      if (ch === 0x21/* ! */) {
        if (!isNamed) {
          tagHandle = state.input.slice(_position - 1, state.position + 1);

          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {
            throwError(state, 'named tag handle cannot contain such characters');
          }

          isNamed = true;
          _position = state.position + 1;
        } else {
          throwError(state, 'tag suffix cannot contain exclamation marks');
        }
      }

      ch = state.input.charCodeAt(++state.position);
    }

    tagName = state.input.slice(_position, state.position);

    if (PATTERN_FLOW_INDICATORS.test(tagName)) {
      throwError(state, 'tag suffix cannot contain flow indicator characters');
    }
  }

  if (tagName && !PATTERN_TAG_URI.test(tagName)) {
    throwError(state, 'tag name cannot contain such characters: ' + tagName);
  }

  if (isVerbatim) {
    state.tag = tagName;

  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {
    state.tag = state.tagMap[tagHandle] + tagName;

  } else if (tagHandle === '!') {
    state.tag = '!' + tagName;

  } else if (tagHandle === '!!') {
    state.tag = 'tag:yaml.org,2002:' + tagName;

  } else {
    throwError(state, 'undeclared tag handle "' + tagHandle + '"');
  }

  return true;
}

function readAnchorProperty(state) {
  var _position,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x26/* & */) return false;

  if (state.anchor !== null) {
    throwError(state, 'duplication of an anchor property');
  }

  ch = state.input.charCodeAt(++state.position);
  _position = state.position;

  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
    ch = state.input.charCodeAt(++state.position);
  }

  if (state.position === _position) {
    throwError(state, 'name of an anchor node must contain at least one character');
  }

  state.anchor = state.input.slice(_position, state.position);
  return true;
}

function readAlias(state) {
  var _position, alias,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch !== 0x2A/* * */) return false;

  ch = state.input.charCodeAt(++state.position);
  _position = state.position;

  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
    ch = state.input.charCodeAt(++state.position);
  }

  if (state.position === _position) {
    throwError(state, 'name of an alias node must contain at least one character');
  }

  alias = state.input.slice(_position, state.position);

  if (!state.anchorMap.hasOwnProperty(alias)) {
    throwError(state, 'unidentified alias "' + alias + '"');
  }

  state.result = state.anchorMap[alias];
  skipSeparationSpace(state, true, -1);
  return true;
}

function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {
  var allowBlockStyles,
      allowBlockScalars,
      allowBlockCollections,
      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent
      atNewLine  = false,
      hasContent = false,
      typeIndex,
      typeQuantity,
      type,
      flowIndent,
      blockIndent;

  if (state.listener !== null) {
    state.listener('open', state);
  }

  state.tag    = null;
  state.anchor = null;
  state.kind   = null;
  state.result = null;

  allowBlockStyles = allowBlockScalars = allowBlockCollections =
    CONTEXT_BLOCK_OUT === nodeContext ||
    CONTEXT_BLOCK_IN  === nodeContext;

  if (allowToSeek) {
    if (skipSeparationSpace(state, true, -1)) {
      atNewLine = true;

      if (state.lineIndent > parentIndent) {
        indentStatus = 1;
      } else if (state.lineIndent === parentIndent) {
        indentStatus = 0;
      } else if (state.lineIndent < parentIndent) {
        indentStatus = -1;
      }
    }
  }

  if (indentStatus === 1) {
    while (readTagProperty(state) || readAnchorProperty(state)) {
      if (skipSeparationSpace(state, true, -1)) {
        atNewLine = true;
        allowBlockCollections = allowBlockStyles;

        if (state.lineIndent > parentIndent) {
          indentStatus = 1;
        } else if (state.lineIndent === parentIndent) {
          indentStatus = 0;
        } else if (state.lineIndent < parentIndent) {
          indentStatus = -1;
        }
      } else {
        allowBlockCollections = false;
      }
    }
  }

  if (allowBlockCollections) {
    allowBlockCollections = atNewLine || allowCompact;
  }

  if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {
    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {
      flowIndent = parentIndent;
    } else {
      flowIndent = parentIndent + 1;
    }

    blockIndent = state.position - state.lineStart;

    if (indentStatus === 1) {
      if (allowBlockCollections &&
          (readBlockSequence(state, blockIndent) ||
           readBlockMapping(state, blockIndent, flowIndent)) ||
          readFlowCollection(state, flowIndent)) {
        hasContent = true;
      } else {
        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||
            readSingleQuotedScalar(state, flowIndent) ||
            readDoubleQuotedScalar(state, flowIndent)) {
          hasContent = true;

        } else if (readAlias(state)) {
          hasContent = true;

          if (state.tag !== null || state.anchor !== null) {
            throwError(state, 'alias node should not have any properties');
          }

        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {
          hasContent = true;

          if (state.tag === null) {
            state.tag = '?';
          }
        }

        if (state.anchor !== null) {
          state.anchorMap[state.anchor] = state.result;
        }
      }
    } else if (indentStatus === 0) {
      // Special case: block sequences are allowed to have same indentation level as the parent.
      // http://www.yaml.org/spec/1.2/spec.html#id2799784
      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);
    }
  }

  if (state.tag !== null && state.tag !== '!') {
    if (state.tag === '?') {
      for (typeIndex = 0, typeQuantity = state.implicitTypes.length; typeIndex < typeQuantity; typeIndex += 1) {
        type = state.implicitTypes[typeIndex];

        // Implicit resolving is not allowed for non-scalar types, and '?'
        // non-specific tag is only assigned to plain scalars. So, it isn't
        // needed to check for 'kind' conformity.

        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched
          state.result = type.construct(state.result);
          state.tag = type.tag;
          if (state.anchor !== null) {
            state.anchorMap[state.anchor] = state.result;
          }
          break;
        }
      }
    } else if (_hasOwnProperty.call(state.typeMap[state.kind || 'fallback'], state.tag)) {
      type = state.typeMap[state.kind || 'fallback'][state.tag];

      if (state.result !== null && type.kind !== state.kind) {
        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"');
      }

      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched
        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');
      } else {
        state.result = type.construct(state.result);
        if (state.anchor !== null) {
          state.anchorMap[state.anchor] = state.result;
        }
      }
    } else {
      throwError(state, 'unknown tag !<' + state.tag + '>');
    }
  }

  if (state.listener !== null) {
    state.listener('close', state);
  }
  return state.tag !== null ||  state.anchor !== null || hasContent;
}

function readDocument(state) {
  var documentStart = state.position,
      _position,
      directiveName,
      directiveArgs,
      hasDirectives = false,
      ch;

  state.version = null;
  state.checkLineBreaks = state.legacy;
  state.tagMap = {};
  state.anchorMap = {};

  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
    skipSeparationSpace(state, true, -1);

    ch = state.input.charCodeAt(state.position);

    if (state.lineIndent > 0 || ch !== 0x25/* % */) {
      break;
    }

    hasDirectives = true;
    ch = state.input.charCodeAt(++state.position);
    _position = state.position;

    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
      ch = state.input.charCodeAt(++state.position);
    }

    directiveName = state.input.slice(_position, state.position);
    directiveArgs = [];

    if (directiveName.length < 1) {
      throwError(state, 'directive name must not be less than one character in length');
    }

    while (ch !== 0) {
      while (is_WHITE_SPACE(ch)) {
        ch = state.input.charCodeAt(++state.position);
      }

      if (ch === 0x23/* # */) {
        do { ch = state.input.charCodeAt(++state.position); }
        while (ch !== 0 && !is_EOL(ch));
        break;
      }

      if (is_EOL(ch)) break;

      _position = state.position;

      while (ch !== 0 && !is_WS_OR_EOL(ch)) {
        ch = state.input.charCodeAt(++state.position);
      }

      directiveArgs.push(state.input.slice(_position, state.position));
    }

    if (ch !== 0) readLineBreak(state);

    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {
      directiveHandlers[directiveName](state, directiveName, directiveArgs);
    } else {
      throwWarning(state, 'unknown document directive "' + directiveName + '"');
    }
  }

  skipSeparationSpace(state, true, -1);

  if (state.lineIndent === 0 &&
      state.input.charCodeAt(state.position)     === 0x2D/* - */ &&
      state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&
      state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {
    state.position += 3;
    skipSeparationSpace(state, true, -1);

  } else if (hasDirectives) {
    throwError(state, 'directives end mark is expected');
  }

  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);
  skipSeparationSpace(state, true, -1);

  if (state.checkLineBreaks &&
      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {
    throwWarning(state, 'non-ASCII line breaks are interpreted as content');
  }

  state.documents.push(state.result);

  if (state.position === state.lineStart && testDocumentSeparator(state)) {

    if (state.input.charCodeAt(state.position) === 0x2E/* . */) {
      state.position += 3;
      skipSeparationSpace(state, true, -1);
    }
    return;
  }

  if (state.position < (state.length - 1)) {
    throwError(state, 'end of the stream or a document separator is expected');
  } else {
    return;
  }
}


function loadDocuments(input, options) {
  input = String(input);
  options = options || {};

  if (input.length !== 0) {

    // Add tailing `\n` if not exists
    if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&
        input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {
      input += '\n';
    }

    // Strip BOM
    if (input.charCodeAt(0) === 0xFEFF) {
      input = input.slice(1);
    }
  }

  var state = new State(input, options);

  // Use 0 as string terminator. That significantly simplifies bounds check.
  state.input += '\0';

  while (state.input.charCodeAt(state.position) === 0x20/* Space */) {
    state.lineIndent += 1;
    state.position += 1;
  }

  while (state.position < (state.length - 1)) {
    readDocument(state);
  }

  return state.documents;
}


function loadAll(input, iterator, options) {
  var documents = loadDocuments(input, options), index, length;

  if (typeof iterator !== 'function') {
    return documents;
  }

  for (index = 0, length = documents.length; index < length; index += 1) {
    iterator(documents[index]);
  }
}


function load(input, options) {
  var documents = loadDocuments(input, options);

  if (documents.length === 0) {
    /*eslint-disable no-undefined*/
    return undefined;
  } else if (documents.length === 1) {
    return documents[0];
  }
  throw new YAMLException('expected a single document in the stream, but found more');
}


function safeLoadAll(input, output, options) {
  if (typeof output === 'function') {
    loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
  } else {
    return loadAll(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
  }
}


function safeLoad(input, options) {
  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
}


module.exports.loadAll     = loadAll;
module.exports.load        = load;
module.exports.safeLoadAll = safeLoadAll;
module.exports.safeLoad    = safeLoad;

},{"./common":29,"./exception":31,"./mark":33,"./schema/default_full":36,"./schema/default_safe":37}],33:[function(require,module,exports){
'use strict';


var common = require('./common');


function Mark(name, buffer, position, line, column) {
  this.name     = name;
  this.buffer   = buffer;
  this.position = position;
  this.line     = line;
  this.column   = column;
}


Mark.prototype.getSnippet = function getSnippet(indent, maxLength) {
  var head, start, tail, end, snippet;

  if (!this.buffer) return null;

  indent = indent || 4;
  maxLength = maxLength || 75;

  head = '';
  start = this.position;

  while (start > 0 && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(start - 1)) === -1) {
    start -= 1;
    if (this.position - start > (maxLength / 2 - 1)) {
      head = ' ... ';
      start += 5;
      break;
    }
  }

  tail = '';
  end = this.position;

  while (end < this.buffer.length && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(end)) === -1) {
    end += 1;
    if (end - this.position > (maxLength / 2 - 1)) {
      tail = ' ... ';
      end -= 5;
      break;
    }
  }

  snippet = this.buffer.slice(start, end);

  return common.repeat(' ', indent) + head + snippet + tail + '\n' +
         common.repeat(' ', indent + this.position - start + head.length) + '^';
};


Mark.prototype.toString = function toString(compact) {
  var snippet, where = '';

  if (this.name) {
    where += 'in "' + this.name + '" ';
  }

  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);

  if (!compact) {
    snippet = this.getSnippet();

    if (snippet) {
      where += ':\n' + snippet;
    }
  }

  return where;
};


module.exports = Mark;

},{"./common":29}],34:[function(require,module,exports){
'use strict';

/*eslint-disable max-len*/

var common        = require('./common');
var YAMLException = require('./exception');
var Type          = require('./type');


function compileList(schema, name, result) {
  var exclude = [];

  schema.include.forEach(function (includedSchema) {
    result = compileList(includedSchema, name, result);
  });

  schema[name].forEach(function (currentType) {
    result.forEach(function (previousType, previousIndex) {
      if (previousType.tag === currentType.tag && previousType.kind === currentType.kind) {
        exclude.push(previousIndex);
      }
    });

    result.push(currentType);
  });

  return result.filter(function (type, index) {
    return exclude.indexOf(index) === -1;
  });
}


function compileMap(/* lists... */) {
  var result = {
        scalar: {},
        sequence: {},
        mapping: {},
        fallback: {}
      }, index, length;

  function collectType(type) {
    result[type.kind][type.tag] = result['fallback'][type.tag] = type;
  }

  for (index = 0, length = arguments.length; index < length; index += 1) {
    arguments[index].forEach(collectType);
  }
  return result;
}


function Schema(definition) {
  this.include  = definition.include  || [];
  this.implicit = definition.implicit || [];
  this.explicit = definition.explicit || [];

  this.implicit.forEach(function (type) {
    if (type.loadKind && type.loadKind !== 'scalar') {
      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
    }
  });

  this.compiledImplicit = compileList(this, 'implicit', []);
  this.compiledExplicit = compileList(this, 'explicit', []);
  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);
}


Schema.DEFAULT = null;


Schema.create = function createSchema() {
  var schemas, types;

  switch (arguments.length) {
    case 1:
      schemas = Schema.DEFAULT;
      types = arguments[0];
      break;

    case 2:
      schemas = arguments[0];
      types = arguments[1];
      break;

    default:
      throw new YAMLException('Wrong number of arguments for Schema.create function');
  }

  schemas = common.toArray(schemas);
  types = common.toArray(types);

  if (!schemas.every(function (schema) { return schema instanceof Schema; })) {
    throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');
  }

  if (!types.every(function (type) { return type instanceof Type; })) {
    throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
  }

  return new Schema({
    include: schemas,
    explicit: types
  });
};


module.exports = Schema;

},{"./common":29,"./exception":31,"./type":40}],35:[function(require,module,exports){
// Standard YAML's Core schema.
// http://www.yaml.org/spec/1.2/spec.html#id2804923
//
// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
// So, Core schema has no distinctions from JSON schema is JS-YAML.


'use strict';


var Schema = require('../schema');


module.exports = new Schema({
  include: [
    require('./json')
  ]
});

},{"../schema":34,"./json":39}],36:[function(require,module,exports){
// JS-YAML's default schema for `load` function.
// It is not described in the YAML specification.
//
// This schema is based on JS-YAML's default safe schema and includes
// JavaScript-specific types: !!js/undefined, !!js/regexp and !!js/function.
//
// Also this schema is used as default base schema at `Schema.create` function.


'use strict';


var Schema = require('../schema');


module.exports = Schema.DEFAULT = new Schema({
  include: [
    require('./default_safe')
  ],
  explicit: [
    require('../type/js/undefined'),
    require('../type/js/regexp'),
    require('../type/js/function')
  ]
});

},{"../schema":34,"../type/js/function":45,"../type/js/regexp":46,"../type/js/undefined":47,"./default_safe":37}],37:[function(require,module,exports){
// JS-YAML's default schema for `safeLoad` function.
// It is not described in the YAML specification.
//
// This schema is based on standard YAML's Core schema and includes most of
// extra types described at YAML tag repository. (http://yaml.org/type/)


'use strict';


var Schema = require('../schema');


module.exports = new Schema({
  include: [
    require('./core')
  ],
  implicit: [
    require('../type/timestamp'),
    require('../type/merge')
  ],
  explicit: [
    require('../type/binary'),
    require('../type/omap'),
    require('../type/pairs'),
    require('../type/set')
  ]
});

},{"../schema":34,"../type/binary":41,"../type/merge":49,"../type/omap":51,"../type/pairs":52,"../type/set":54,"../type/timestamp":56,"./core":35}],38:[function(require,module,exports){
// Standard YAML's Failsafe schema.
// http://www.yaml.org/spec/1.2/spec.html#id2802346


'use strict';


var Schema = require('../schema');


module.exports = new Schema({
  explicit: [
    require('../type/str'),
    require('../type/seq'),
    require('../type/map')
  ]
});

},{"../schema":34,"../type/map":48,"../type/seq":53,"../type/str":55}],39:[function(require,module,exports){
// Standard YAML's JSON schema.
// http://www.yaml.org/spec/1.2/spec.html#id2803231
//
// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
// So, this schema is not such strict as defined in the YAML specification.
// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.


'use strict';


var Schema = require('../schema');


module.exports = new Schema({
  include: [
    require('./failsafe')
  ],
  implicit: [
    require('../type/null'),
    require('../type/bool'),
    require('../type/int'),
    require('../type/float')
  ]
});

},{"../schema":34,"../type/bool":42,"../type/float":43,"../type/int":44,"../type/null":50,"./failsafe":38}],40:[function(require,module,exports){
'use strict';

var YAMLException = require('./exception');

var TYPE_CONSTRUCTOR_OPTIONS = [
  'kind',
  'resolve',
  'construct',
  'instanceOf',
  'predicate',
  'represent',
  'defaultStyle',
  'styleAliases'
];

var YAML_NODE_KINDS = [
  'scalar',
  'sequence',
  'mapping'
];

function compileStyleAliases(map) {
  var result = {};

  if (map !== null) {
    Object.keys(map).forEach(function (style) {
      map[style].forEach(function (alias) {
        result[String(alias)] = style;
      });
    });
  }

  return result;
}

function Type(tag, options) {
  options = options || {};

  Object.keys(options).forEach(function (name) {
    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
      throw new YAMLException('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.');
    }
  });

  // TODO: Add tag format check.
  this.tag          = tag;
  this.kind         = options['kind']         || null;
  this.resolve      = options['resolve']      || function () { return true; };
  this.construct    = options['construct']    || function (data) { return data; };
  this.instanceOf   = options['instanceOf']   || null;
  this.predicate    = options['predicate']    || null;
  this.represent    = options['represent']    || null;
  this.defaultStyle = options['defaultStyle'] || null;
  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);

  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
    throw new YAMLException('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.');
  }
}

module.exports = Type;

},{"./exception":31}],41:[function(require,module,exports){
'use strict';

/*eslint-disable no-bitwise*/

var NodeBuffer;

try {
  // A trick for browserified version, to not include `Buffer` shim
  var _require = require;
  NodeBuffer = _require('buffer').Buffer;
} catch (__) {}

var Type       = require('../type');


// [ 64, 65, 66 ] -> [ padding, CR, LF ]
var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r';


function resolveYamlBinary(data) {
  if (data === null) return false;

  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;

  // Convert one by one.
  for (idx = 0; idx < max; idx++) {
    code = map.indexOf(data.charAt(idx));

    // Skip CR/LF
    if (code > 64) continue;

    // Fail on illegal characters
    if (code < 0) return false;

    bitlen += 6;
  }

  // If there are any bits left, source was corrupted
  return (bitlen % 8) === 0;
}

function constructYamlBinary(data) {
  var idx, tailbits,
      input = data.replace(/[\r\n=]/g, ''), // remove CR/LF & padding to simplify scan
      max = input.length,
      map = BASE64_MAP,
      bits = 0,
      result = [];

  // Collect by 6*4 bits (3 bytes)

  for (idx = 0; idx < max; idx++) {
    if ((idx % 4 === 0) && idx) {
      result.push((bits >> 16) & 0xFF);
      result.push((bits >> 8) & 0xFF);
      result.push(bits & 0xFF);
    }

    bits = (bits << 6) | map.indexOf(input.charAt(idx));
  }

  // Dump tail

  tailbits = (max % 4) * 6;

  if (tailbits === 0) {
    result.push((bits >> 16) & 0xFF);
    result.push((bits >> 8) & 0xFF);
    result.push(bits & 0xFF);
  } else if (tailbits === 18) {
    result.push((bits >> 10) & 0xFF);
    result.push((bits >> 2) & 0xFF);
  } else if (tailbits === 12) {
    result.push((bits >> 4) & 0xFF);
  }

  // Wrap into Buffer for NodeJS and leave Array for browser
  if (NodeBuffer) {
    // Support node 6.+ Buffer API when available
    return NodeBuffer.from ? NodeBuffer.from(result) : new NodeBuffer(result);
  }

  return result;
}

function representYamlBinary(object /*, style*/) {
  var result = '', bits = 0, idx, tail,
      max = object.length,
      map = BASE64_MAP;

  // Convert every three bytes to 4 ASCII characters.

  for (idx = 0; idx < max; idx++) {
    if ((idx % 3 === 0) && idx) {
      result += map[(bits >> 18) & 0x3F];
      result += map[(bits >> 12) & 0x3F];
      result += map[(bits >> 6) & 0x3F];
      result += map[bits & 0x3F];
    }

    bits = (bits << 8) + object[idx];
  }

  // Dump tail

  tail = max % 3;

  if (tail === 0) {
    result += map[(bits >> 18) & 0x3F];
    result += map[(bits >> 12) & 0x3F];
    result += map[(bits >> 6) & 0x3F];
    result += map[bits & 0x3F];
  } else if (tail === 2) {
    result += map[(bits >> 10) & 0x3F];
    result += map[(bits >> 4) & 0x3F];
    result += map[(bits << 2) & 0x3F];
    result += map[64];
  } else if (tail === 1) {
    result += map[(bits >> 2) & 0x3F];
    result += map[(bits << 4) & 0x3F];
    result += map[64];
    result += map[64];
  }

  return result;
}

function isBinary(object) {
  return NodeBuffer && NodeBuffer.isBuffer(object);
}

module.exports = new Type('tag:yaml.org,2002:binary', {
  kind: 'scalar',
  resolve: resolveYamlBinary,
  construct: constructYamlBinary,
  predicate: isBinary,
  represent: representYamlBinary
});

},{"../type":40}],42:[function(require,module,exports){
'use strict';

var Type = require('../type');

function resolveYamlBoolean(data) {
  if (data === null) return false;

  var max = data.length;

  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||
         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));
}

function constructYamlBoolean(data) {
  return data === 'true' ||
         data === 'True' ||
         data === 'TRUE';
}

function isBoolean(object) {
  return Object.prototype.toString.call(object) === '[object Boolean]';
}

module.exports = new Type('tag:yaml.org,2002:bool', {
  kind: 'scalar',
  resolve: resolveYamlBoolean,
  construct: constructYamlBoolean,
  predicate: isBoolean,
  represent: {
    lowercase: function (object) { return object ? 'true' : 'false'; },
    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },
    camelcase: function (object) { return object ? 'True' : 'False'; }
  },
  defaultStyle: 'lowercase'
});

},{"../type":40}],43:[function(require,module,exports){
'use strict';

var common = require('../common');
var Type   = require('../type');

var YAML_FLOAT_PATTERN = new RegExp(
  // 2.5e4, 2.5 and integers
  '^(?:[-+]?(?:0|[1-9][0-9_]*)(?:\\.[0-9_]*)?(?:[eE][-+]?[0-9]+)?' +
  // .2e4, .2
  // special case, seems not from spec
  '|\\.[0-9_]+(?:[eE][-+]?[0-9]+)?' +
  // 20:59
  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*' +
  // .inf
  '|[-+]?\\.(?:inf|Inf|INF)' +
  // .nan
  '|\\.(?:nan|NaN|NAN))$');

function resolveYamlFloat(data) {
  if (data === null) return false;

  if (!YAML_FLOAT_PATTERN.test(data) ||
      // Quick hack to not allow integers end with `_`
      // Probably should update regexp & check speed
      data[data.length - 1] === '_') {
    return false;
  }

  return true;
}

function constructYamlFloat(data) {
  var value, sign, base, digits;

  value  = data.replace(/_/g, '').toLowerCase();
  sign   = value[0] === '-' ? -1 : 1;
  digits = [];

  if ('+-'.indexOf(value[0]) >= 0) {
    value = value.slice(1);
  }

  if (value === '.inf') {
    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;

  } else if (value === '.nan') {
    return NaN;

  } else if (value.indexOf(':') >= 0) {
    value.split(':').forEach(function (v) {
      digits.unshift(parseFloat(v, 10));
    });

    value = 0.0;
    base = 1;

    digits.forEach(function (d) {
      value += d * base;
      base *= 60;
    });

    return sign * value;

  }
  return sign * parseFloat(value, 10);
}


var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;

function representYamlFloat(object, style) {
  var res;

  if (isNaN(object)) {
    switch (style) {
      case 'lowercase': return '.nan';
      case 'uppercase': return '.NAN';
      case 'camelcase': return '.NaN';
    }
  } else if (Number.POSITIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase': return '.inf';
      case 'uppercase': return '.INF';
      case 'camelcase': return '.Inf';
    }
  } else if (Number.NEGATIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase': return '-.inf';
      case 'uppercase': return '-.INF';
      case 'camelcase': return '-.Inf';
    }
  } else if (common.isNegativeZero(object)) {
    return '-0.0';
  }

  res = object.toString(10);

  // JS stringifier can build scientific format without dots: 5e-100,
  // while YAML requres dot: 5.e-100. Fix it with simple hack

  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
}

function isFloat(object) {
  return (Object.prototype.toString.call(object) === '[object Number]') &&
         (object % 1 !== 0 || common.isNegativeZero(object));
}

module.exports = new Type('tag:yaml.org,2002:float', {
  kind: 'scalar',
  resolve: resolveYamlFloat,
  construct: constructYamlFloat,
  predicate: isFloat,
  represent: representYamlFloat,
  defaultStyle: 'lowercase'
});

},{"../common":29,"../type":40}],44:[function(require,module,exports){
'use strict';

var common = require('../common');
var Type   = require('../type');

function isHexCode(c) {
  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||
         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||
         ((0x61/* a */ <= c) && (c <= 0x66/* f */));
}

function isOctCode(c) {
  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));
}

function isDecCode(c) {
  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));
}

function resolveYamlInteger(data) {
  if (data === null) return false;

  var max = data.length,
      index = 0,
      hasDigits = false,
      ch;

  if (!max) return false;

  ch = data[index];

  // sign
  if (ch === '-' || ch === '+') {
    ch = data[++index];
  }

  if (ch === '0') {
    // 0
    if (index + 1 === max) return true;
    ch = data[++index];

    // base 2, base 8, base 16

    if (ch === 'b') {
      // base 2
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') continue;
        if (ch !== '0' && ch !== '1') return false;
        hasDigits = true;
      }
      return hasDigits && ch !== '_';
    }


    if (ch === 'x') {
      // base 16
      index++;

      for (; index < max; index++) {
        ch = data[index];
        if (ch === '_') continue;
        if (!isHexCode(data.charCodeAt(index))) return false;
        hasDigits = true;
      }
      return hasDigits && ch !== '_';
    }

    // base 8
    for (; index < max; index++) {
      ch = data[index];
      if (ch === '_') continue;
      if (!isOctCode(data.charCodeAt(index))) return false;
      hasDigits = true;
    }
    return hasDigits && ch !== '_';
  }

  // base 10 (except 0) or base 60

  // value should not start with `_`;
  if (ch === '_') return false;

  for (; index < max; index++) {
    ch = data[index];
    if (ch === '_') continue;
    if (ch === ':') break;
    if (!isDecCode(data.charCodeAt(index))) {
      return false;
    }
    hasDigits = true;
  }

  // Should have digits and should not end with `_`
  if (!hasDigits || ch === '_') return false;

  // if !base60 - done;
  if (ch !== ':') return true;

  // base60 almost not used, no needs to optimize
  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));
}

function constructYamlInteger(data) {
  var value = data, sign = 1, ch, base, digits = [];

  if (value.indexOf('_') !== -1) {
    value = value.replace(/_/g, '');
  }

  ch = value[0];

  if (ch === '-' || ch === '+') {
    if (ch === '-') sign = -1;
    value = value.slice(1);
    ch = value[0];
  }

  if (value === '0') return 0;

  if (ch === '0') {
    if (value[1] === 'b') return sign * parseInt(value.slice(2), 2);
    if (value[1] === 'x') return sign * parseInt(value, 16);
    return sign * parseInt(value, 8);
  }

  if (value.indexOf(':') !== -1) {
    value.split(':').forEach(function (v) {
      digits.unshift(parseInt(v, 10));
    });

    value = 0;
    base = 1;

    digits.forEach(function (d) {
      value += (d * base);
      base *= 60;
    });

    return sign * value;

  }

  return sign * parseInt(value, 10);
}

function isInteger(object) {
  return (Object.prototype.toString.call(object)) === '[object Number]' &&
         (object % 1 === 0 && !common.isNegativeZero(object));
}

module.exports = new Type('tag:yaml.org,2002:int', {
  kind: 'scalar',
  resolve: resolveYamlInteger,
  construct: constructYamlInteger,
  predicate: isInteger,
  represent: {
    binary:      function (object) { return '0b' + object.toString(2); },
    octal:       function (object) { return '0'  + object.toString(8); },
    decimal:     function (object) { return        object.toString(10); },
    hexadecimal: function (object) { return '0x' + object.toString(16).toUpperCase(); }
  },
  defaultStyle: 'decimal',
  styleAliases: {
    binary:      [ 2,  'bin' ],
    octal:       [ 8,  'oct' ],
    decimal:     [ 10, 'dec' ],
    hexadecimal: [ 16, 'hex' ]
  }
});

},{"../common":29,"../type":40}],45:[function(require,module,exports){
'use strict';

var esprima;

// Browserified version does not have esprima
//
// 1. For node.js just require module as deps
// 2. For browser try to require mudule via external AMD system.
//    If not found - try to fallback to window.esprima. If not
//    found too - then fail to parse.
//
try {
  // workaround to exclude package from browserify list.
  var _require = require;
  esprima = _require('esprima');
} catch (_) {
  /*global window */
  if (typeof window !== 'undefined') esprima = window.esprima;
}

var Type = require('../../type');

function resolveJavascriptFunction(data) {
  if (data === null) return false;

  try {
    var source = '(' + data + ')',
        ast    = esprima.parse(source, { range: true });

    if (ast.type                    !== 'Program'             ||
        ast.body.length             !== 1                     ||
        ast.body[0].type            !== 'ExpressionStatement' ||
        ast.body[0].expression.type !== 'FunctionExpression') {
      return false;
    }

    return true;
  } catch (err) {
    return false;
  }
}

function constructJavascriptFunction(data) {
  /*jslint evil:true*/

  var source = '(' + data + ')',
      ast    = esprima.parse(source, { range: true }),
      params = [],
      body;

  if (ast.type                    !== 'Program'             ||
      ast.body.length             !== 1                     ||
      ast.body[0].type            !== 'ExpressionStatement' ||
      ast.body[0].expression.type !== 'FunctionExpression') {
    throw new Error('Failed to resolve function');
  }

  ast.body[0].expression.params.forEach(function (param) {
    params.push(param.name);
  });

  body = ast.body[0].expression.body.range;

  // Esprima's ranges include the first '{' and the last '}' characters on
  // function expressions. So cut them out.
  /*eslint-disable no-new-func*/
  return new Function(params, source.slice(body[0] + 1, body[1] - 1));
}

function representJavascriptFunction(object /*, style*/) {
  return object.toString();
}

function isFunction(object) {
  return Object.prototype.toString.call(object) === '[object Function]';
}

module.exports = new Type('tag:yaml.org,2002:js/function', {
  kind: 'scalar',
  resolve: resolveJavascriptFunction,
  construct: constructJavascriptFunction,
  predicate: isFunction,
  represent: representJavascriptFunction
});

},{"../../type":40}],46:[function(require,module,exports){
'use strict';

var Type = require('../../type');

function resolveJavascriptRegExp(data) {
  if (data === null) return false;
  if (data.length === 0) return false;

  var regexp = data,
      tail   = /\/([gim]*)$/.exec(data),
      modifiers = '';

  // if regexp starts with '/' it can have modifiers and must be properly closed
  // `/foo/gim` - modifiers tail can be maximum 3 chars
  if (regexp[0] === '/') {
    if (tail) modifiers = tail[1];

    if (modifiers.length > 3) return false;
    // if expression starts with /, is should be properly terminated
    if (regexp[regexp.length - modifiers.length - 1] !== '/') return false;
  }

  return true;
}

function constructJavascriptRegExp(data) {
  var regexp = data,
      tail   = /\/([gim]*)$/.exec(data),
      modifiers = '';

  // `/foo/gim` - tail can be maximum 4 chars
  if (regexp[0] === '/') {
    if (tail) modifiers = tail[1];
    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
  }

  return new RegExp(regexp, modifiers);
}

function representJavascriptRegExp(object /*, style*/) {
  var result = '/' + object.source + '/';

  if (object.global) result += 'g';
  if (object.multiline) result += 'm';
  if (object.ignoreCase) result += 'i';

  return result;
}

function isRegExp(object) {
  return Object.prototype.toString.call(object) === '[object RegExp]';
}

module.exports = new Type('tag:yaml.org,2002:js/regexp', {
  kind: 'scalar',
  resolve: resolveJavascriptRegExp,
  construct: constructJavascriptRegExp,
  predicate: isRegExp,
  represent: representJavascriptRegExp
});

},{"../../type":40}],47:[function(require,module,exports){
'use strict';

var Type = require('../../type');

function resolveJavascriptUndefined() {
  return true;
}

function constructJavascriptUndefined() {
  /*eslint-disable no-undefined*/
  return undefined;
}

function representJavascriptUndefined() {
  return '';
}

function isUndefined(object) {
  return typeof object === 'undefined';
}

module.exports = new Type('tag:yaml.org,2002:js/undefined', {
  kind: 'scalar',
  resolve: resolveJavascriptUndefined,
  construct: constructJavascriptUndefined,
  predicate: isUndefined,
  represent: representJavascriptUndefined
});

},{"../../type":40}],48:[function(require,module,exports){
'use strict';

var Type = require('../type');

module.exports = new Type('tag:yaml.org,2002:map', {
  kind: 'mapping',
  construct: function (data) { return data !== null ? data : {}; }
});

},{"../type":40}],49:[function(require,module,exports){
'use strict';

var Type = require('../type');

function resolveYamlMerge(data) {
  return data === '<<' || data === null;
}

module.exports = new Type('tag:yaml.org,2002:merge', {
  kind: 'scalar',
  resolve: resolveYamlMerge
});

},{"../type":40}],50:[function(require,module,exports){
'use strict';

var Type = require('../type');

function resolveYamlNull(data) {
  if (data === null) return true;

  var max = data.length;

  return (max === 1 && data === '~') ||
         (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'));
}

function constructYamlNull() {
  return null;
}

function isNull(object) {
  return object === null;
}

module.exports = new Type('tag:yaml.org,2002:null', {
  kind: 'scalar',
  resolve: resolveYamlNull,
  construct: constructYamlNull,
  predicate: isNull,
  represent: {
    canonical: function () { return '~';    },
    lowercase: function () { return 'null'; },
    uppercase: function () { return 'NULL'; },
    camelcase: function () { return 'Null'; }
  },
  defaultStyle: 'lowercase'
});

},{"../type":40}],51:[function(require,module,exports){
'use strict';

var Type = require('../type');

var _hasOwnProperty = Object.prototype.hasOwnProperty;
var _toString       = Object.prototype.toString;

function resolveYamlOmap(data) {
  if (data === null) return true;

  var objectKeys = [], index, length, pair, pairKey, pairHasKey,
      object = data;

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];
    pairHasKey = false;

    if (_toString.call(pair) !== '[object Object]') return false;

    for (pairKey in pair) {
      if (_hasOwnProperty.call(pair, pairKey)) {
        if (!pairHasKey) pairHasKey = true;
        else return false;
      }
    }

    if (!pairHasKey) return false;

    if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey);
    else return false;
  }

  return true;
}

function constructYamlOmap(data) {
  return data !== null ? data : [];
}

module.exports = new Type('tag:yaml.org,2002:omap', {
  kind: 'sequence',
  resolve: resolveYamlOmap,
  construct: constructYamlOmap
});

},{"../type":40}],52:[function(require,module,exports){
'use strict';

var Type = require('../type');

var _toString = Object.prototype.toString;

function resolveYamlPairs(data) {
  if (data === null) return true;

  var index, length, pair, keys, result,
      object = data;

  result = new Array(object.length);

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];

    if (_toString.call(pair) !== '[object Object]') return false;

    keys = Object.keys(pair);

    if (keys.length !== 1) return false;

    result[index] = [ keys[0], pair[keys[0]] ];
  }

  return true;
}

function constructYamlPairs(data) {
  if (data === null) return [];

  var index, length, pair, keys, result,
      object = data;

  result = new Array(object.length);

  for (index = 0, length = object.length; index < length; index += 1) {
    pair = object[index];

    keys = Object.keys(pair);

    result[index] = [ keys[0], pair[keys[0]] ];
  }

  return result;
}

module.exports = new Type('tag:yaml.org,2002:pairs', {
  kind: 'sequence',
  resolve: resolveYamlPairs,
  construct: constructYamlPairs
});

},{"../type":40}],53:[function(require,module,exports){
'use strict';

var Type = require('../type');

module.exports = new Type('tag:yaml.org,2002:seq', {
  kind: 'sequence',
  construct: function (data) { return data !== null ? data : []; }
});

},{"../type":40}],54:[function(require,module,exports){
'use strict';

var Type = require('../type');

var _hasOwnProperty = Object.prototype.hasOwnProperty;

function resolveYamlSet(data) {
  if (data === null) return true;

  var key, object = data;

  for (key in object) {
    if (_hasOwnProperty.call(object, key)) {
      if (object[key] !== null) return false;
    }
  }

  return true;
}

function constructYamlSet(data) {
  return data !== null ? data : {};
}

module.exports = new Type('tag:yaml.org,2002:set', {
  kind: 'mapping',
  resolve: resolveYamlSet,
  construct: constructYamlSet
});

},{"../type":40}],55:[function(require,module,exports){
'use strict';

var Type = require('../type');

module.exports = new Type('tag:yaml.org,2002:str', {
  kind: 'scalar',
  construct: function (data) { return data !== null ? data : ''; }
});

},{"../type":40}],56:[function(require,module,exports){
'use strict';

var Type = require('../type');

var YAML_DATE_REGEXP = new RegExp(
  '^([0-9][0-9][0-9][0-9])'          + // [1] year
  '-([0-9][0-9])'                    + // [2] month
  '-([0-9][0-9])$');                   // [3] day

var YAML_TIMESTAMP_REGEXP = new RegExp(
  '^([0-9][0-9][0-9][0-9])'          + // [1] year
  '-([0-9][0-9]?)'                   + // [2] month
  '-([0-9][0-9]?)'                   + // [3] day
  '(?:[Tt]|[ \\t]+)'                 + // ...
  '([0-9][0-9]?)'                    + // [4] hour
  ':([0-9][0-9])'                    + // [5] minute
  ':([0-9][0-9])'                    + // [6] second
  '(?:\\.([0-9]*))?'                 + // [7] fraction
  '(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour
  '(?::([0-9][0-9]))?))?$');           // [11] tz_minute

function resolveYamlTimestamp(data) {
  if (data === null) return false;
  if (YAML_DATE_REGEXP.exec(data) !== null) return true;
  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;
  return false;
}

function constructYamlTimestamp(data) {
  var match, year, month, day, hour, minute, second, fraction = 0,
      delta = null, tz_hour, tz_minute, date;

  match = YAML_DATE_REGEXP.exec(data);
  if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);

  if (match === null) throw new Error('Date resolve error');

  // match: [1] year [2] month [3] day

  year = +(match[1]);
  month = +(match[2]) - 1; // JS month starts with 0
  day = +(match[3]);

  if (!match[4]) { // no hour
    return new Date(Date.UTC(year, month, day));
  }

  // match: [4] hour [5] minute [6] second [7] fraction

  hour = +(match[4]);
  minute = +(match[5]);
  second = +(match[6]);

  if (match[7]) {
    fraction = match[7].slice(0, 3);
    while (fraction.length < 3) { // milli-seconds
      fraction += '0';
    }
    fraction = +fraction;
  }

  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute

  if (match[9]) {
    tz_hour = +(match[10]);
    tz_minute = +(match[11] || 0);
    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds
    if (match[9] === '-') delta = -delta;
  }

  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));

  if (delta) date.setTime(date.getTime() - delta);

  return date;
}

function representYamlTimestamp(object /*, style*/) {
  return object.toISOString();
}

module.exports = new Type('tag:yaml.org,2002:timestamp', {
  kind: 'scalar',
  resolve: resolveYamlTimestamp,
  construct: constructYamlTimestamp,
  instanceOf: Date,
  represent: representYamlTimestamp
});

},{"../type":40}],57:[function(require,module,exports){
(function (process){
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Jeremy Whitlock
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

'use strict';

/**
 * Various utilities for JSON References *(http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03)* and
 * JSON Pointers *(https://tools.ietf.org/html/rfc6901)*.
 *
 * @module JsonRefs
 */

var _ = require('lodash');
var gl = require('graphlib');
var path = require('path');
var PathLoader = require('path-loader');
var qs = require('querystring');
var slash = require('slash');
var URI = require('uri-js');

var badPtrTokenRegex = /~(?:[^01]|$)/g;
var remoteCache = {};
var remoteTypes = ['relative', 'remote'];
var remoteUriTypes = ['absolute', 'uri'];
var uriDetailsCache = {};

// Load promises polyfill if necessary
/* istanbul ignore if */
if (typeof Promise === 'undefined') {
  require('native-promise-only');
}

/* Internal Functions */

function combineQueryParams (qs1, qs2) {
  var combined = {};

  function mergeQueryParams (obj) {
    _.forOwn(obj, function (val, key) {
      combined[key] = val;
    });
  }

  mergeQueryParams(qs.parse(qs1 || ''));
  mergeQueryParams(qs.parse(qs2 || ''));

  return Object.keys(combined).length === 0 ? undefined : qs.stringify(combined);
}

function combineURIs (u1, u2) {
  // Convert Windows paths
  if (_.isString(u1)) {
    u1 = slash(u1);
  }

  if (_.isString(u2)) {
    u2 = slash(u2);
  }

  var u2Details = parseURI(_.isUndefined(u2) ? '' : u2);
  var u1Details;
  var combinedDetails;

  if (remoteUriTypes.indexOf(u2Details.reference) > -1) {
    combinedDetails = u2Details;
  } else {
    u1Details = _.isUndefined(u1) ? undefined : parseURI(u1);

    if (!_.isUndefined(u1Details)) {
      combinedDetails = u1Details;

      // Join the paths
      combinedDetails.path = slash(path.join(u1Details.path, u2Details.path));

      // Join query parameters
      combinedDetails.query = combineQueryParams(u1Details.query, u2Details.query);
    } else {
      combinedDetails = u2Details;
    }
  }

  // Remove the fragment
  combinedDetails.fragment = undefined;

  // For relative URIs, add back the '..' since it was removed above
  return (remoteUriTypes.indexOf(combinedDetails.reference) === -1 &&
          combinedDetails.path.indexOf('../') === 0 ? '../' : '') + URI.serialize(combinedDetails);
}

function findAncestors (obj, path) {
  var ancestors = [];
  var node;

  if (path.length > 0) {
    node = obj;

    path.slice(0, path.length - 1).forEach(function (seg) {
      if (seg in node) {
        node = node[seg];

        ancestors.push(node);
      }
    });
  }

  return ancestors;
}

function isRemote (refDetails) {
  return remoteTypes.indexOf(getRefType(refDetails)) > -1;
}

function isValid (refDetails) {
  return _.isUndefined(refDetails.error) && refDetails.type !== 'invalid';
}

function findValue (obj, path) {
  var value = obj;

  // Using this manual approach instead of _.get since we have to decodeURI the segments
  path.forEach(function (seg) {
    seg = decodeURI(seg);

    if (seg in value) {
      value = value[seg];
    } else {
      throw Error('JSON Pointer points to missing location: ' + pathToPtr(path));
    }
  });

  return value;
}

function getExtraRefKeys (ref) {
  return Object.keys(ref).filter(function (key) {
    return key !== '$ref';
  });
}

function getRefType (refDetails) {
  var type;

  // Convert the URI reference to one of our types
  switch (refDetails.uriDetails.reference) {
  case 'absolute':
  case 'uri':
    type = 'remote';
    break;
  case 'same-document':
    type = 'local';
    break;
  default:
    type = refDetails.uriDetails.reference;
  }

  return type;
}

function getRemoteDocument (url, options) {
  var cacheEntry = remoteCache[url];
  var allTasks = Promise.resolve();
  var loaderOptions = _.cloneDeep(options.loaderOptions || {});

  if (_.isUndefined(cacheEntry)) {
    // If there is no content processor, default to processing the raw response as JSON
    if (_.isUndefined(loaderOptions.processContent)) {
      loaderOptions.processContent = function (res, callback) {
        callback(undefined, JSON.parse(res.text));
      };
    }

    // Attempt to load the resource using path-loader
    allTasks = PathLoader.load(decodeURI(url), loaderOptions);

    // Update the cache
    allTasks = allTasks
      .then(function (res) {
        remoteCache[url] = {
          value: res
        };

        return res;
      })
      .catch(function (err) {
        remoteCache[url] = {
          error: err
        };

        throw err;
      });
  } else {
    // Return the cached version
    allTasks = allTasks.then(function () {
      if (_.isError(cacheEntry.error)) {
        throw cacheEntry.error;
      } else {
        return cacheEntry.value;
      }
    });
  }

  // Return a cloned version to avoid updating the cache
  allTasks = allTasks.then(function (res) {
    return _.cloneDeep(res);
  });

  return allTasks;
}

function isRefLike (obj, throwWithDetails) {
  var refLike = true;

  try {
    if (!_.isPlainObject(obj)) {
      throw new Error('obj is not an Object');
    } else if (!_.isString(obj.$ref)) {
      throw new Error('obj.$ref is not a String');
    }
  } catch (err) {
    if (throwWithDetails) {
      throw err;
    }

    refLike = false;
  }

  return refLike;
}

function makeAbsolute (location) {
  if (location.indexOf('://') === -1 && !path.isAbsolute(location)) {
    return path.resolve(process.cwd(), location);
  } else {
    return location;
  }
}

function makeRefFilter (options) {
  var refFilter;
  var validTypes;

  if (_.isArray(options.filter) || _.isString(options.filter)) {
    validTypes = _.isString(options.filter) ? [options.filter] : options.filter;
    refFilter = function (refDetails) {
      // Check the exact type or for invalid URIs, check its original type
      return validTypes.indexOf(refDetails.type) > -1 || validTypes.indexOf(getRefType(refDetails)) > -1;
    };
  } else if (_.isFunction(options.filter)) {
    refFilter = options.filter;
  } else if (_.isUndefined(options.filter)) {
    refFilter = function () {
      return true;
    };
  }

  return function (refDetails, path) {
    return (refDetails.type !== 'invalid' || options.includeInvalid === true) && refFilter(refDetails, path);
  };
}

function makeSubDocPath (options) {
  var subDocPath;

  if (_.isArray(options.subDocPath)) {
    subDocPath = options.subDocPath;
  } else if (_.isString(options.subDocPath)) {
    subDocPath = pathFromPtr(options.subDocPath);
  } else if (_.isUndefined(options.subDocPath)) {
    subDocPath = [];
  }

  return subDocPath;
}

function markMissing (refDetails, err) {
  refDetails.error = err.message;
  refDetails.missing = true;
}

function parseURI (uri) {
  // We decode first to avoid doubly encoding
  return URI.parse(encodeURI(decodeURI(uri)));
}

function buildRefModel (document, options, metadata) {
  var allTasks = Promise.resolve();
  var subDocPtr = pathToPtr(options.subDocPath);
  var absLocation = makeAbsolute(options.location);
  var relativeBase = path.dirname(options.location);
  var docDepKey = absLocation + subDocPtr;
  var refs;
  var rOptions;

  // Store the document in the metadata if necessary
  if (_.isUndefined(metadata.docs[absLocation])) {
    metadata.docs[absLocation] = document;
  }

  // If there are no dependencies stored for the location+subDocPath, we've never seen it before and will process it
  if (_.isUndefined(metadata.deps[docDepKey])) {
    metadata.deps[docDepKey] = {};

    // Find the references based on the options
    refs = findRefs(document, options);

    // Iterate over the references and process
    _.forOwn(refs, function (refDetails, refPtr) {
      var refKey = makeAbsolute(options.location) + refPtr;
      var refdKey = refDetails.refdId = makeAbsolute(isRemote(refDetails) ?
                                                       combineURIs(relativeBase, refDetails.uri) :
                                                       options.location) + '#' +
                                          (refDetails.uri.indexOf('#') > -1 ?
                                             refDetails.uri.split('#')[1] :
                                             '');

      // Record reference metadata
      metadata.refs[refKey] = refDetails;

      // Do not process invalid references
      if (!isValid(refDetails)) {
        return;
      }

      // Record dependency (relative to the document's sub-document path)
      metadata.deps[docDepKey][refPtr === subDocPtr ? '#' : refPtr.replace(subDocPtr + '/', '#/')] = refdKey;

      // Do not process directly-circular references (to an ancestor or self)
      if (refKey.indexOf(refdKey + '/') === 0) {
        refDetails.circular = true;

        return;
      }

      // Prepare the options for subsequent processDocument calls
      rOptions = _.cloneDeep(options);

      rOptions.subDocPath = _.isUndefined(refDetails.uriDetails.fragment) ?
                                     [] :
                                     pathFromPtr(decodeURI(refDetails.uriDetails.fragment));

      // Resolve the reference
      if (isRemote(refDetails)) {
        // Delete filter.options because all remote references should be fully resolved
        delete rOptions.filter;
        // The new location being referenced
        rOptions.location = refdKey.split('#')[0];

        allTasks = allTasks
          .then(function (nMetadata, nOptions) {
            return function () {
              var rAbsLocation = makeAbsolute(nOptions.location);
              var rDoc = nMetadata.docs[rAbsLocation];

              if (_.isUndefined(rDoc)) {
                // We have no cache so we must retrieve the document
                return getRemoteDocument(rAbsLocation, nOptions)
                        .catch(function (err) {
                          // Store the response in the document cache
                          nMetadata.docs[rAbsLocation] = err;

                          // Return the error to allow the subsequent `then` to handle both errors and successes
                          return err;
                        });
              } else {
                // We have already retrieved (or attempted to) the document and should use the cached version in the
                // metadata since it could already be processed some.
                return Promise.resolve()
                  .then(function () {
                    return rDoc;
                  });
              }
            };
          }(metadata, rOptions));
      } else {
        allTasks = allTasks
          .then(function () {
            return document;
          });
      }

      // Process the remote document or the referenced portion of the local document
      allTasks = allTasks
        .then(function (nMetadata, nOptions, nRefDetails) {
          return function (doc) {
            if (_.isError(doc)) {
              markMissing(nRefDetails, doc);
            } else {
              // Wrapped in a try/catch since findRefs throws
              try {
                return buildRefModel(doc, nOptions, nMetadata)
                  .catch(function (err) {
                    markMissing(nRefDetails, err);
                  });
              } catch (err) {
                markMissing(nRefDetails, err);
              }
            }
          };
        }(metadata, rOptions, refDetails));
    });
  }

  return allTasks;
}

function setValue (obj, refPath, value) {
  findValue(obj, refPath.slice(0, refPath.length - 1))[decodeURI(refPath[refPath.length - 1])] = value;
}

function walk (ancestors, node, path, fn) {
  var processChildren = true;

  function walkItem (item, segment) {
    path.push(segment);
    walk(ancestors, item, path, fn);
    path.pop();
  }

  // Call the iteratee
  if (_.isFunction(fn)) {
    processChildren = fn(ancestors, node, path);
  }

  // We do not process circular objects again
  if (ancestors.indexOf(node) === -1) {
    ancestors.push(node);

    if (processChildren !== false) {
      if (_.isArray(node)) {
        node.forEach(function (member, index) {
          walkItem(member, index.toString());
        });
      } else if (_.isObject(node)) {
        _.forOwn(node, function (cNode, key) {
          walkItem(cNode, key);
        });
      }
    }

    ancestors.pop();
  }
}

function validateOptions (options, obj) {
  var locationParts;

  if (_.isUndefined(options)) {
    // Default to an empty options object
    options = {};
  } else {
    // Clone the options so we do not alter the ones passed in
    options = _.cloneDeep(options);
  }

  if (!_.isObject(options)) {
    throw new TypeError('options must be an Object');
  } else if (!_.isUndefined(options.resolveCirculars) &&
             !_.isBoolean(options.resolveCirculars)) {
    throw new TypeError('options.resolveCirculars must be a Boolean');
  } else if (!_.isUndefined(options.filter) &&
             !_.isArray(options.filter) &&
             !_.isFunction(options.filter) &&
             !_.isString(options.filter)) {
    throw new TypeError('options.filter must be an Array, a Function of a String');
  } else if (!_.isUndefined(options.includeInvalid) &&
             !_.isBoolean(options.includeInvalid)) {
    throw new TypeError('options.includeInvalid must be a Boolean');
  } else if (!_.isUndefined(options.location) &&
             !_.isString(options.location)) {
    throw new TypeError('options.location must be a String');
  } else if (!_.isUndefined(options.refPreProcessor) &&
             !_.isFunction(options.refPreProcessor)) {
    throw new TypeError('options.refPreProcessor must be a Function');
  } else if (!_.isUndefined(options.refPostProcessor) &&
             !_.isFunction(options.refPostProcessor)) {
    throw new TypeError('options.refPostProcessor must be a Function');
  } else if (!_.isUndefined(options.subDocPath) &&
             !_.isArray(options.subDocPath) &&
             !isPtr(options.subDocPath)) {
    // If a pointer is provided, throw an error if it's not the proper type
    throw new TypeError('options.subDocPath must be an Array of path segments or a valid JSON Pointer');
  }

  // Default to false for allowing circulars
  if (_.isUndefined(options.resolveCirculars)) {
    options.resolveCirculars = false;
  }

  options.filter = makeRefFilter(options);

  // options.location is not officially supported yet but will be when Issue 88 is complete
  if (_.isUndefined(options.location)) {
    options.location = makeAbsolute('./root.json');
  }

  locationParts = options.location.split('#');

  // If options.location contains a fragment, turn it into an options.subDocPath
  if (locationParts.length > 1) {
    options.subDocPath = '#' + locationParts[1];
  }

  // Just to be safe, remove any accidental fragment as it would break things
  options.location = combineURIs(options.location, undefined);

  // Set the subDocPath to avoid everyone else having to compute it
  options.subDocPath = makeSubDocPath(options);

  if (!_.isUndefined(obj)) {
    try {
      findValue(obj, options.subDocPath);
    } catch (err) {
      err.message = err.message.replace('JSON Pointer', 'options.subDocPath');

      throw err;
    }
  }

  return options;
}

/* Module Members */

/*
 * Each of the functions below are defined as function statements and *then* exported in two steps instead of one due
 * to a bug in jsdoc (https://github.com/jsdoc2md/jsdoc-parse/issues/18) that causes our documentation to be
 * generated improperly.  The impact to the user is significant enough for us to warrant working around it until this
 * is fixed.
 */

/**
 * The options used for various JsonRefs APIs.
 *
 * @typedef {object} JsonRefsOptions
 *
 * @param {string|string[]|function} [filter=function () {return true;}] - The filter to use when gathering JSON
 * References *(If this value is a single string or an array of strings, the value(s) are expected to be the `type(s)`
 * you are interested in collecting as described in {@link module:JsonRefs.getRefDetails}.  If it is a function, it is
 * expected that the function behaves like {@link module:JsonRefs~RefDetailsFilter}.)*
 * @param {boolean} [includeInvalid=false] - Whether or not to include invalid JSON Reference details *(This will make
 * it so that objects that are like JSON Reference objects, as in they are an `Object` and the have a `$ref` property,
 * but fail validation will be included.  This is very useful for when you want to know if you have invalid JSON
 * Reference definitions.  This will not mean that APIs will process invalid JSON References but the reasons as to why
 * the JSON References are invalid will be included in the returned metadata.)*
 * @param {object} [loaderOptions] - The options to pass to
 * {@link https://github.com/whitlockjc/path-loader/blob/master/docs/API.md#module_PathLoader.load|PathLoader~load}
 * @param {string} [location=root.json] - The location of the document being processed  *(This property is only useful
 * when resolving references as it will be used to locate relative references found within the document being resolved.
 * If this value is relative, {@link https://github.com/whitlockjc/path-loader|path-loader} will use
 * `window.location.href` for the browser and `process.cwd()` for Node.js.)*
 * @param {module:JsonRefs~RefPreProcessor} [refPreProcessor] - The callback used to pre-process a JSON Reference like
 * object *(This is called prior to validating the JSON Reference like object and getting its details)*
 * @param {module:JsonRefs~RefPostProcessor} [refPostProcessor] - The callback used to post-process the JSON Reference
 * metadata *(This is called prior filtering the references)*
 * @param {boolean} [resolveCirculars=false] - Whether to resolve circular references
 * @param {string|string[]} [options.subDocPath=[]] - The JSON Pointer or array of path segments to the sub document
 * location to search from
 */

/**
 * Simple function used to filter out JSON References.
 *
 * @typedef {function} RefDetailsFilter
 *
 * @param {module:JsonRefs~UnresolvedRefDetails} refDetails - The JSON Reference details to test
 * @param {string[]} path - The path to the JSON Reference
 *
 * @returns {boolean} whether the JSON Reference should be filtered *(out)* or not
 */

/**
 * Simple function used to pre-process a JSON Reference like object.
 *
 * @typedef {function} RefPreProcessor
 *
 * @param {object} obj - The JSON Reference like object
 * @param {string[]} path - The path to the JSON Reference like object
 *
 * @returns {object} the processed JSON Reference like object
 */

/**
 * Simple function used to post-process a JSON Reference details.
 *
 * @typedef {function} RefPostProcessor
 *
 * @param {module:JsonRefs~UnresolvedRefDetails} refDetails - The JSON Reference details to test
 * @param {string[]} path - The path to the JSON Reference
 *
 * @returns {object} the processed JSON Reference details object
 */

/**
 * Detailed information about resolved JSON References.
 *
 * @typedef {module:JsonRefs~UnresolvedRefDetails} ResolvedRefDetails
 *
 * @property {boolean} [circular] - Whether or not the JSON Reference is circular *(Will not be set if the JSON
 * Reference is not circular)*
 * @property {boolean} [missing] - Whether or not the referenced value was missing or not *(Will not be set if the
 * referenced value is not missing)*
 * @property {*} [value] - The referenced value *(Will not be set if the referenced value is missing)*
 */

/**
 * The results of resolving the JSON References of an array/object.
 *
 * @typedef {object} ResolvedRefsResults
 *
 * @property {module:JsonRefs~ResolvedRefDetails} refs - An object whose keys are JSON Pointers *(fragment version)*
 * to where the JSON Reference is defined and whose values are {@link module:JsonRefs~ResolvedRefDetails}
 * @property {object} resolved - The array/object with its JSON References fully resolved
 */

/**
 * An object containing the retrieved document and detailed information about its JSON References.
 *
 * @typedef {module:JsonRefs~ResolvedRefsResults} RetrievedRefsResults
 *
 * @property {object} value - The retrieved document
 */

/**
 * An object containing the retrieved document, the document with its references resolved and  detailed information
 * about its JSON References.
 *
 * @typedef {object} RetrievedResolvedRefsResults
 *
 * @property {module:JsonRefs~UnresolvedRefDetails} refs - An object whose keys are JSON Pointers *(fragment version)*
 * to where the JSON Reference is defined and whose values are {@link module:JsonRefs~UnresolvedRefDetails}
 * @property {ResolvedRefsResults} - An object whose keys are JSON Pointers *(fragment version)*
 * to where the JSON Reference is defined and whose values are {@link module:JsonRefs~ResolvedRefDetails}
 * @property {object} value - The retrieved document
 */

/**
 * Detailed information about unresolved JSON References.
 *
 * @typedef {object} UnresolvedRefDetails
 *
 * @property {object} def - The JSON Reference definition
 * @property {string} [error] - The error information for invalid JSON Reference definition *(Only present when the
 * JSON Reference definition is invalid or there was a problem retrieving a remote reference during resolution)*
 * @property {string} uri - The URI portion of the JSON Reference
 * @property {object} uriDetails - Detailed information about the URI as provided by
 * {@link https://github.com/garycourt/uri-js|URI.parse}.
 * @property {string} type - The JSON Reference type *(This value can be one of the following: `invalid`, `local`,
 * `relative` or `remote`.)*
 * @property {string} [warning] - The warning information *(Only present when the JSON Reference definition produces a
 * warning)*
 */

/**
 * Clears the internal cache of remote documents, reference details, etc.
 *
 * @alias module:JsonRefs.clearCache
 */
function clearCache () {
  remoteCache = {};
}

/**
 * Takes an array of path segments and decodes the JSON Pointer tokens in them.
 *
 * @param {string[]} path - The array of path segments
 *
 * @returns {string} the array of path segments with their JSON Pointer tokens decoded
 *
 * @throws {Error} if the path is not an `Array`
 *
 * @see {@link https://tools.ietf.org/html/rfc6901#section-3}
 *
 * @alias module:JsonRefs.decodePath
 */
function decodePath (path) {
  if (!_.isArray(path)) {
    throw new TypeError('path must be an array');
  }

  return path.map(function (seg) {
    if (!_.isString(seg)) {
      seg = JSON.stringify(seg);
    }

    return decodeURI(seg.replace(/~1/g, '/').replace(/~0/g, '~'));
  });
}

/**
 * Takes an array of path segments and encodes the special JSON Pointer characters in them.
 *
 * @param {string[]} path - The array of path segments
 *
 * @returns {string} the array of path segments with their JSON Pointer tokens encoded
 *
 * @throws {Error} if the path is not an `Array`
 *
 * @see {@link https://tools.ietf.org/html/rfc6901#section-3}
 *
 * @alias module:JsonRefs.encodePath
 */
function encodePath (path) {
  if (!_.isArray(path)) {
    throw new TypeError('path must be an array');
  }

  return path.map(function (seg) {
    if (!_.isString(seg)) {
      seg = JSON.stringify(seg);
    }

    return seg.replace(/~/g, '~0').replace(/\//g, '~1');
  });
}

/**
 * Finds JSON References defined within the provided array/object.
 *
 * @param {array|object} obj - The structure to find JSON References within
 * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options
 *
 * @returns {object} an object whose keys are JSON Pointers *(fragment version)* to where the JSON Reference is defined
 * and whose values are {@link module:JsonRefs~UnresolvedRefDetails}.
 *
 * @throws {Error} when the input arguments fail validation or if `options.subDocPath` points to an invalid location
 *
 * @alias module:JsonRefs.findRefs
 *
 * @example
 * // Finding all valid references
 * var allRefs = JsonRefs.findRefs(obj);
 * // Finding all remote references
 * var remoteRefs = JsonRefs.findRefs(obj, {filter: ['relative', 'remote']});
 * // Finding all invalid references
 * var invalidRefs = JsonRefs.findRefs(obj, {filter: 'invalid', includeInvalid: true});
 */
function findRefs (obj, options) {
  var refs = {};

  // Validate the provided document
  if (!_.isArray(obj) && !_.isObject(obj)) {
    throw new TypeError('obj must be an Array or an Object');
  }

  // Validate options
  options = validateOptions(options, obj);

  // Walk the document (or sub document) and find all JSON References
  walk(findAncestors(obj, options.subDocPath),
       findValue(obj, options.subDocPath),
       _.cloneDeep(options.subDocPath),
       function (ancestors, node, path) {
         var processChildren = true;
         var refDetails;
         var refPtr;

         if (isRefLike(node)) {
           // Pre-process the node when necessary
           if (!_.isUndefined(options.refPreProcessor)) {
             node = options.refPreProcessor(_.cloneDeep(node), path);
           }

           refDetails = getRefDetails(node);

           // Post-process the reference details
           if (!_.isUndefined(options.refPostProcessor)) {
             refDetails = options.refPostProcessor(refDetails, path);
           }

           if (options.filter(refDetails, path)) {
             refPtr = pathToPtr(path);

             refs[refPtr] = refDetails;
           }

           // Whenever a JSON Reference has extra children, its children should not be processed.
           //   See: http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03#section-3
           if (getExtraRefKeys(node).length > 0) {
             processChildren = false;
           }
         }

         return processChildren;
       });

  return refs;
}

/**
 * Finds JSON References defined within the document at the provided location.
 *
 * This API is identical to {@link module:JsonRefs.findRefs} except this API will retrieve a remote document and then
 * return the result of {@link module:JsonRefs.findRefs} on the retrieved document.
 *
 * @param {string} location - The location to retrieve *(Can be relative or absolute, just make sure you look at the
 * {@link module:JsonRefs~JsonRefsOptions|options documentation} to see how relative references are handled.)*
 * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options
 *
 * @returns {Promise} a promise that resolves a {@link module:JsonRefs~RetrievedRefsResults} and rejects with an
 * `Error` when the input arguments fail validation, when `options.subDocPath` points to an invalid location or when
 *  the location argument points to an unloadable resource
 *
 * @alias module:JsonRefs.findRefsAt
 *
 * @example
 * // Example that only resolves references within a sub document
 * JsonRefs.findRefsAt('http://petstore.swagger.io/v2/swagger.json', {
 *     subDocPath: '#/definitions'
 *   })
 *   .then(function (res) {
 *      // Do something with the response
 *      //
 *      // res.refs: JSON Reference locations and details
 *      // res.value: The retrieved document
 *   }, function (err) {
 *     console.log(err.stack);
 *   });
 */
function findRefsAt (location, options) {
  var allTasks = Promise.resolve();

  allTasks = allTasks
    .then(function () {
      // Validate the provided location
      if (!_.isString(location)) {
        throw new TypeError('location must be a string');
      }

      if (_.isUndefined(options)) {
        options = {};
      }

      if (_.isObject(options)) {
        // Add the location to the options for processing/validation
        options.location = location;
      }

      // Validate options
      options = validateOptions(options);

      return getRemoteDocument(options.location, options);
    })
    .then(function (res) {
      var cacheEntry = _.cloneDeep(remoteCache[options.location]);
      var cOptions = _.cloneDeep(options);
      var uriDetails = parseURI(options.location);

      if (_.isUndefined(cacheEntry.refs)) {
        // Do not filter any references so the cache is complete
        delete cOptions.filter;
        delete cOptions.subDocPath;

        cOptions.includeInvalid = true;

        remoteCache[options.location].refs = findRefs(res, cOptions);
      }

      // Add the filter options back
      if (!_.isUndefined(options.filter)) {
        cOptions.filter = options.filter;
      }

      if (!_.isUndefined(uriDetails.fragment)) {
        cOptions.subDocPath = pathFromPtr(decodeURI(uriDetails.fragment));
      } else if (!_.isUndefined(uriDetails.subDocPath)) {
        cOptions.subDocPath = options.subDocPath;
      }

      // This will use the cache so don't worry about calling it twice
      return {
        refs: findRefs(res, cOptions),
        value: res
      };
    });

  return allTasks;
}

/**
 * Returns detailed information about the JSON Reference.
 *
 * @param {object} obj - The JSON Reference definition
 *
 * @returns {module:JsonRefs~UnresolvedRefDetails} the detailed information
 *
 * @alias module:JsonRefs.getRefDetails
 */
function getRefDetails (obj) {
  var details = {
    def: obj
  };
  var cacheKey;
  var extraKeys;
  var uriDetails;

  try {
    if (isRefLike(obj, true)) {
      cacheKey = obj.$ref;
      uriDetails = uriDetailsCache[cacheKey];

      if (_.isUndefined(uriDetails)) {
        uriDetails = uriDetailsCache[cacheKey] = parseURI(cacheKey);
      }

      details.uri = cacheKey;
      details.uriDetails = uriDetails;

      if (_.isUndefined(uriDetails.error)) {
        details.type = getRefType(details);
      } else {
        details.error = details.uriDetails.error;
        details.type = 'invalid';
      }

      // Identify warning
      extraKeys = getExtraRefKeys(obj);

      if (extraKeys.length > 0) {
        details.warning = 'Extra JSON Reference properties will be ignored: ' + extraKeys.join(', ');
      }
    } else {
      details.type = 'invalid';
    }
  } catch (err) {
    details.error = err.message;
    details.type = 'invalid';
  }

  return details;
}

/**
 * Returns whether the argument represents a JSON Pointer.
 *
 * A string is a JSON Pointer if the following are all true:
 *
 *   * The string is of type `String`
 *   * The string must be empty, `#` or start with a `/` or `#/`
 *
 * @param {string} ptr - The string to check
 * @param {boolean} [throwWithDetails=false] - Whether or not to throw an `Error` with the details as to why the value
 * provided is invalid
 *
 * @returns {boolean} the result of the check
 *
 * @throws {error} when the provided value is invalid and the `throwWithDetails` argument is `true`
 *
 * @alias module:JsonRefs.isPtr
 *
 * @see {@link https://tools.ietf.org/html/rfc6901#section-3}
 *
 * @example
 * // Separating the different ways to invoke isPtr for demonstration purposes
 * if (isPtr(str)) {
 *   // Handle a valid JSON Pointer
 * } else {
 *   // Get the reason as to why the value is not a JSON Pointer so you can fix/report it
 *   try {
 *     isPtr(str, true);
 *   } catch (err) {
 *     // The error message contains the details as to why the provided value is not a JSON Pointer
 *   }
 * }
 */
function isPtr (ptr, throwWithDetails) {
  var valid = true;
  var firstChar;

  try {
    if (_.isString(ptr)) {
      if (ptr !== '') {
        firstChar = ptr.charAt(0);

        if (['#', '/'].indexOf(firstChar) === -1) {
          throw new Error('ptr must start with a / or #/');
        } else if (firstChar === '#' && ptr !== '#' && ptr.charAt(1) !== '/') {
          throw new Error('ptr must start with a / or #/');
        } else if (ptr.match(badPtrTokenRegex)) {
          throw new Error('ptr has invalid token(s)');
        }
      }
    } else {
      throw new Error('ptr is not a String');
    }
  } catch (err) {
    if (throwWithDetails === true) {
      throw err;
    }

    valid = false;
  }

  return valid;
}

/**
 * Returns whether the argument represents a JSON Reference.
 *
 * An object is a JSON Reference only if the following are all true:
 *
 *   * The object is of type `Object`
 *   * The object has a `$ref` property
 *   * The `$ref` property is a valid URI *(We do not require 100% strict URIs and will handle unescaped special
 *     characters.)*
 *
 * @param {object} obj - The object to check
 * @param {boolean} [throwWithDetails=false] - Whether or not to throw an `Error` with the details as to why the value
 * provided is invalid
 *
 * @returns {boolean} the result of the check
 *
 * @throws {error} when the provided value is invalid and the `throwWithDetails` argument is `true`
 *
 * @alias module:JsonRefs.isRef
 *
 * @see {@link http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03#section-3}
 *
 * @example
 * // Separating the different ways to invoke isRef for demonstration purposes
 * if (isRef(obj)) {
 *   // Handle a valid JSON Reference
 * } else {
 *   // Get the reason as to why the value is not a JSON Reference so you can fix/report it
 *   try {
 *     isRef(str, true);
 *   } catch (err) {
 *     // The error message contains the details as to why the provided value is not a JSON Reference
 *   }
 * }
 */
function isRef (obj, throwWithDetails) {
  return isRefLike(obj, throwWithDetails) && getRefDetails(obj, throwWithDetails).type !== 'invalid';
}

/**
 * Returns an array of path segments for the provided JSON Pointer.
 *
 * @param {string} ptr - The JSON Pointer
 *
 * @returns {string[]} the path segments
 *
 * @throws {Error} if the provided `ptr` argument is not a JSON Pointer
 *
 * @alias module:JsonRefs.pathFromPtr
 */
function pathFromPtr (ptr) {
  try {
    isPtr(ptr, true);
  } catch (err) {
    throw new Error('ptr must be a JSON Pointer: ' + err.message);
  }

  var segments = ptr.split('/');

  // Remove the first segment
  segments.shift();

  return decodePath(segments);
}

/**
 * Returns a JSON Pointer for the provided array of path segments.
 *
 * **Note:** If a path segment in `path` is not a `String`, it will be converted to one using `JSON.stringify`.
 *
 * @param {string[]} path - The array of path segments
 * @param {boolean} [hashPrefix=true] - Whether or not create a hash-prefixed JSON Pointer
 *
 * @returns {string} the corresponding JSON Pointer
 *
 * @throws {Error} if the `path` argument is not an array
 *
 * @alias module:JsonRefs.pathToPtr
 */
function pathToPtr (path, hashPrefix) {
  if (!_.isArray(path)) {
    throw new Error('path must be an Array');
  }

  // Encode each segment and return
  return (hashPrefix !== false ? '#' : '') + (path.length > 0 ? '/' : '') + encodePath(path).join('/');
}

/**
 * Finds JSON References defined within the provided array/object and resolves them.
 *
 * @param {array|object} obj - The structure to find JSON References within
 * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options
 *
 * @returns {Promise} a promise that resolves a {@link module:JsonRefs~ResolvedRefsResults} and rejects with an
 * `Error` when the input arguments fail validation, when `options.subDocPath` points to an invalid location or when
 *  the location argument points to an unloadable resource
 *
 * @alias module:JsonRefs.resolveRefs
 *
 * @example
 * // Example that only resolves relative and remote references
 * JsonRefs.resolveRefs(swaggerObj, {
 *     filter: ['relative', 'remote']
 *   })
 *   .then(function (res) {
 *      // Do something with the response
 *      //
 *      // res.refs: JSON Reference locations and details
 *      // res.resolved: The document with the appropriate JSON References resolved
 *   }, function (err) {
 *     console.log(err.stack);
 *   });
 */
function resolveRefs (obj, options) {
  var allTasks = Promise.resolve();

  allTasks = allTasks
    .then(function () {
      // Validate the provided document
      if (!_.isArray(obj) && !_.isObject(obj)) {
        throw new TypeError('obj must be an Array or an Object');
      }

      // Validate options
      options = validateOptions(options, obj);

      // Clone the input so we do not alter it
      obj = _.cloneDeep(obj);
    })
    .then(function () {
      var metadata = {
        deps: {}, // To avoid processing the same refernece twice, and for circular reference identification
        docs: {}, // Cache to avoid processing the same document more than once
        refs: {} // Reference locations and their metadata
      };

      return buildRefModel(obj, options, metadata)
        .then(function () {
          return metadata;
        });
    })
    .then(function (results) {
      var allRefs = {};
      var circularPaths = [];
      var circulars = [];
      var depGraph = new gl.Graph();
      var fullLocation = makeAbsolute(options.location);
      var refsRoot = fullLocation + pathToPtr(options.subDocPath);

      // Identify circulars

      // Add nodes first
      Object.keys(results.deps).forEach(function (node) {
        depGraph.setNode(node);
      });

      // Add edges
      _.forOwn(results.deps, function (props, node) {
        _.forOwn(props, function (dep) {
          depGraph.setEdge(node, dep);
        });
      });

      circularPaths = gl.alg.findCycles(depGraph);

      // Create a unique list of circulars
      circularPaths.forEach(function (path) {
        path.forEach(function (seg) {
          if (circulars.indexOf(seg) === -1) {
            circulars.push(seg);
          }
        });
      });

      // Process circulars
      _.forOwn(results.deps, function (props, node) {
        _.forOwn(props, function (dep, prop) {
          var isCircular = false;
          var refPtr = node + prop.slice(1);
          var refDetails = results.refs[node + prop.slice(1)];
          var remote = isRemote(refDetails);
          var pathIndex;

          if (circulars.indexOf(dep) > -1) {
            // Figure out if the circular is part of a circular chain or just a reference to a circular
            circularPaths.forEach(function (path) {
              // Short circuit
              if (isCircular) {
                return;
              }

              pathIndex = path.indexOf(dep);

              if (pathIndex > -1) {
                // Check each path segment to see if the reference location is beneath one of its segments
                path.forEach(function (seg) {
                  // Short circuit
                  if (isCircular) {
                    return;
                  }

                  if (refPtr.indexOf(seg + '/') === 0) {
                    // If the reference is local, mark it as circular but if it's a remote reference, only mark it
                    // circular if the matching path is the last path segment.
                    if ((remote && pathIndex === path.length - 1) || !remote) {
                      isCircular = true;
                    }
                  }
                });
              }
            });
          }

          if (isCircular) {
            // Update all references and reference details
            refDetails.circular = true;
          }
        });
      });

      // Resolve the references in reverse order since the current order is top-down
      _.forOwn(Object.keys(results.deps).reverse(), function (parentPtr) {
        var deps = results.deps[parentPtr];
        var pPtrParts = parentPtr.split('#');
        var pDocument = results.docs[pPtrParts[0]];
        var pPtrPath = pathFromPtr(pPtrParts[1]);

        _.forOwn(deps, function (dep, prop) {
          var depParts = dep.split('#');
          var dDocument = results.docs[depParts[0]];
          var dPtrPath = pPtrPath.concat(pathFromPtr(prop));
          var refDetails = results.refs[pPtrParts[0] + pathToPtr(dPtrPath)];

          // Resolve reference if valid
          if (_.isUndefined(refDetails.error) && _.isUndefined(refDetails.missing)) {
            if (!options.resolveCirculars && refDetails.circular) {
              refDetails.value = refDetails.def;
            } else {
              try {
                refDetails.value = findValue(dDocument, pathFromPtr(depParts[1]));
              } catch (err) {
                markMissing(refDetails, err);

                return;
              }

              // If the reference is at the root of the document, replace the document in the cache.  Otherwise, replace
              // the value in the appropriate location in the document cache.
              if (pPtrParts[1] === '' && prop === '#') {
                results.docs[pPtrParts[0]] = refDetails.value;
              } else {
                setValue(pDocument, dPtrPath, refDetails.value);
              }
            }
          }
        });
      });

      function walkRefs (root, refPtr, refPath) {
        var refPtrParts = refPtr.split('#');
        var refDetails = results.refs[refPtr];
        var refDeps;

        // Record the reference (relative to the root document unless the reference is in the root document)
        allRefs[refPtrParts[0] === options.location ?
                  '#' + refPtrParts[1] :
                  pathToPtr(options.subDocPath.concat(refPath))] = refDetails;

        // Do not walk invalid references
        if (refDetails.circular || !isValid(refDetails)) {
          // Sanitize errors
          if (!refDetails.circular && refDetails.error) {
            // The way we use findRefs now results in an error that doesn't match the expectation
            refDetails.error = refDetails.error.replace('options.subDocPath', 'JSON Pointer');

            // Update the error to use the appropriate JSON Pointer
            if (refDetails.error.indexOf('#') > -1) {
              refDetails.error = refDetails.error.replace(refDetails.uri.substr(refDetails.uri.indexOf('#')),
                                                          refDetails.uri);
            }

            // Report errors opening files as JSON Pointer errors
            if (refDetails.error.indexOf('ENOENT:') === 0 || refDetails.error.indexOf('Not Found') === 0) {
              refDetails.error = 'JSON Pointer points to missing location: ' + refDetails.uri;
            }
          }

          return;
        }

        refDeps = results.deps[refDetails.refdId];

        if (refDetails.refdId.indexOf(root) !== 0) {
          Object.keys(refDeps).forEach(function (prop) {
            walkRefs(refDetails.refdId, refDetails.refdId + prop.substr(1), refPath.concat(pathFromPtr(prop)));
          });
        }
      }

      // For performance reasons, we only process a document (or sub document) and each reference once ever.  This means
      // that if we want to provide the full picture as to what paths in the resolved document were created as a result
      // of a reference, we have to take our fully-qualified reference locations and expand them to be all local based
      // on the original document.
      Object.keys(results.refs).forEach(function (refPtr) {
        // We only want to process references found at or beneath the provided document and sub-document path
        if (refPtr.indexOf(refsRoot) !== 0) {
          return;
        }

        walkRefs(refsRoot, refPtr, pathFromPtr(refPtr.substr(refsRoot.length)));
      });

      // Sanitize the reference details
      _.forOwn(results.refs, function (refDetails) {
        // Delete the reference id used for dependency tracking and circular identification
        delete refDetails.refdId;
      });

      return {
        refs: allRefs,
        resolved: results.docs[fullLocation]
      };
    });

  return allTasks;
}

/**
 * Resolves JSON References defined within the document at the provided location.
 *
 * This API is identical to {@link module:JsonRefs.resolveRefs} except this API will retrieve a remote document and then
 * return the result of {@link module:JsonRefs.resolveRefs} on the retrieved document.
 *
 * @param {string} location - The location to retrieve *(Can be relative or absolute, just make sure you look at the
 * {@link module:JsonRefs~JsonRefsOptions|options documentation} to see how relative references are handled.)*
 * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options
 *
 * @returns {Promise} a promise that resolves a {@link module:JsonRefs~RetrievedResolvedRefsResults} and rejects with an
 * `Error` when the input arguments fail validation, when `options.subDocPath` points to an invalid location or when
 *  the location argument points to an unloadable resource
 *
 * @alias module:JsonRefs.resolveRefsAt
 *
 * @example
 * // Example that loads a JSON document (No options.loaderOptions.processContent required) and resolves all references
 * JsonRefs.resolveRefsAt('./swagger.json')
 *   .then(function (res) {
 *      // Do something with the response
 *      //
 *      // res.refs: JSON Reference locations and details
 *      // res.resolved: The document with the appropriate JSON References resolved
 *      // res.value: The retrieved document
 *   }, function (err) {
 *     console.log(err.stack);
 *   });
 */
function resolveRefsAt (location, options) {
  var allTasks = Promise.resolve();

  allTasks = allTasks
    .then(function () {
      // Validate the provided location
      if (!_.isString(location)) {
        throw new TypeError('location must be a string');
      }

      if (_.isUndefined(options)) {
        options = {};
      }

      if (_.isObject(options)) {
        // Add the location to the options for processing/validation
        options.location = location;
      }

      // Validate options
      options = validateOptions(options);

      return getRemoteDocument(options.location, options);
    })
    .then(function (res) {
      var cOptions = _.cloneDeep(options);
      var uriDetails = parseURI(options.location);

      // Set the sub document path if necessary
      if (!_.isUndefined(uriDetails.fragment)) {
        cOptions.subDocPath = pathFromPtr(decodeURI(uriDetails.fragment));
      }

      return resolveRefs(res, cOptions)
        .then(function (res2) {
          return {
            refs: res2.refs,
            resolved: res2.resolved,
            value: res
          };
        });
    });

  return allTasks;
}

/* Export the module members */
module.exports.clearCache = clearCache;
module.exports.decodePath = decodePath;
module.exports.encodePath = encodePath;
module.exports.findRefs = findRefs;
module.exports.findRefsAt = findRefsAt;
module.exports.getRefDetails = getRefDetails;
module.exports.isPtr = isPtr;
module.exports.isRef = isRef;
module.exports.pathFromPtr = pathFromPtr;
module.exports.pathToPtr = pathToPtr;
module.exports.resolveRefs = resolveRefs;
module.exports.resolveRefsAt = resolveRefsAt;

}).call(this,require('_process'))

},{"_process":93,"graphlib":7,"lodash":87,"native-promise-only":88,"path":89,"path-loader":90,"querystring":96,"slash":97,"uri-js":107}],58:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/** Used to pool arrays and objects used internally */
var arrayPool = [];

module.exports = arrayPool;

},{}],59:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseCreate = require('lodash._basecreate'),
    isObject = require('lodash.isobject'),
    setBindData = require('lodash._setbinddata'),
    slice = require('lodash._slice');

/**
 * Used for `Array` method references.
 *
 * Normally `Array.prototype` would suffice, however, using an array literal
 * avoids issues in Narwhal.
 */
var arrayRef = [];

/** Native method shortcuts */
var push = arrayRef.push;

/**
 * The base implementation of `_.bind` that creates the bound function and
 * sets its meta data.
 *
 * @private
 * @param {Array} bindData The bind data array.
 * @returns {Function} Returns the new bound function.
 */
function baseBind(bindData) {
  var func = bindData[0],
      partialArgs = bindData[2],
      thisArg = bindData[4];

  function bound() {
    // `Function#bind` spec
    // http://es5.github.io/#x15.3.4.5
    if (partialArgs) {
      // avoid `arguments` object deoptimizations by using `slice` instead
      // of `Array.prototype.slice.call` and not assigning `arguments` to a
      // variable as a ternary expression
      var args = slice(partialArgs);
      push.apply(args, arguments);
    }
    // mimic the constructor's `return` behavior
    // http://es5.github.io/#x13.2.2
    if (this instanceof bound) {
      // ensure `new bound` is an instance of `func`
      var thisBinding = baseCreate(func.prototype),
          result = func.apply(thisBinding, args || arguments);
      return isObject(result) ? result : thisBinding;
    }
    return func.apply(thisArg, args || arguments);
  }
  setBindData(bound, bindData);
  return bound;
}

module.exports = baseBind;

},{"lodash._basecreate":61,"lodash._setbinddata":70,"lodash._slice":72,"lodash.isobject":83}],60:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var assign = require('lodash.assign'),
    forEach = require('lodash.foreach'),
    forOwn = require('lodash.forown'),
    getArray = require('lodash._getarray'),
    isArray = require('lodash.isarray'),
    isObject = require('lodash.isobject'),
    releaseArray = require('lodash._releasearray'),
    slice = require('lodash._slice');

/** Used to match regexp flags from their coerced string values */
var reFlags = /\w*$/;

/** `Object#toString` result shortcuts */
var argsClass = '[object Arguments]',
    arrayClass = '[object Array]',
    boolClass = '[object Boolean]',
    dateClass = '[object Date]',
    funcClass = '[object Function]',
    numberClass = '[object Number]',
    objectClass = '[object Object]',
    regexpClass = '[object RegExp]',
    stringClass = '[object String]';

/** Used to identify object classifications that `_.clone` supports */
var cloneableClasses = {};
cloneableClasses[funcClass] = false;
cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
cloneableClasses[boolClass] = cloneableClasses[dateClass] =
cloneableClasses[numberClass] = cloneableClasses[objectClass] =
cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;

/** Used for native method references */
var objectProto = Object.prototype;

/** Used to resolve the internal [[Class]] of values */
var toString = objectProto.toString;

/** Native method shortcuts */
var hasOwnProperty = objectProto.hasOwnProperty;

/** Used to lookup a built-in constructor by [[Class]] */
var ctorByClass = {};
ctorByClass[arrayClass] = Array;
ctorByClass[boolClass] = Boolean;
ctorByClass[dateClass] = Date;
ctorByClass[funcClass] = Function;
ctorByClass[objectClass] = Object;
ctorByClass[numberClass] = Number;
ctorByClass[regexpClass] = RegExp;
ctorByClass[stringClass] = String;

/**
 * The base implementation of `_.clone` without argument juggling or support
 * for `thisArg` binding.
 *
 * @private
 * @param {*} value The value to clone.
 * @param {boolean} [isDeep=false] Specify a deep clone.
 * @param {Function} [callback] The function to customize cloning values.
 * @param {Array} [stackA=[]] Tracks traversed source objects.
 * @param {Array} [stackB=[]] Associates clones with source counterparts.
 * @returns {*} Returns the cloned value.
 */
function baseClone(value, isDeep, callback, stackA, stackB) {
  if (callback) {
    var result = callback(value);
    if (typeof result != 'undefined') {
      return result;
    }
  }
  // inspect [[Class]]
  var isObj = isObject(value);
  if (isObj) {
    var className = toString.call(value);
    if (!cloneableClasses[className]) {
      return value;
    }
    var ctor = ctorByClass[className];
    switch (className) {
      case boolClass:
      case dateClass:
        return new ctor(+value);

      case numberClass:
      case stringClass:
        return new ctor(value);

      case regexpClass:
        result = ctor(value.source, reFlags.exec(value));
        result.lastIndex = value.lastIndex;
        return result;
    }
  } else {
    return value;
  }
  var isArr = isArray(value);
  if (isDeep) {
    // check for circular references and return corresponding clone
    var initedStack = !stackA;
    stackA || (stackA = getArray());
    stackB || (stackB = getArray());

    var length = stackA.length;
    while (length--) {
      if (stackA[length] == value) {
        return stackB[length];
      }
    }
    result = isArr ? ctor(value.length) : {};
  }
  else {
    result = isArr ? slice(value) : assign({}, value);
  }
  // add array properties assigned by `RegExp#exec`
  if (isArr) {
    if (hasOwnProperty.call(value, 'index')) {
      result.index = value.index;
    }
    if (hasOwnProperty.call(value, 'input')) {
      result.input = value.input;
    }
  }
  // exit for shallow clone
  if (!isDeep) {
    return result;
  }
  // add the source value to the stack of traversed objects
  // and associate it with its clone
  stackA.push(value);
  stackB.push(result);

  // recursively populate clone (susceptible to call stack limits)
  (isArr ? forEach : forOwn)(value, function(objValue, key) {
    result[key] = baseClone(objValue, isDeep, callback, stackA, stackB);
  });

  if (initedStack) {
    releaseArray(stackA);
    releaseArray(stackB);
  }
  return result;
}

module.exports = baseClone;

},{"lodash._getarray":65,"lodash._releasearray":69,"lodash._slice":72,"lodash.assign":73,"lodash.foreach":76,"lodash.forown":77,"lodash.isarray":80,"lodash.isobject":83}],61:[function(require,module,exports){
(function (global){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var isNative = require('lodash._isnative'),
    isObject = require('lodash.isobject'),
    noop = require('lodash.noop');

/* Native method shortcuts for methods with the same name as other `lodash` methods */
var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate;

/**
 * The base implementation of `_.create` without support for assigning
 * properties to the created object.
 *
 * @private
 * @param {Object} prototype The object to inherit from.
 * @returns {Object} Returns the new object.
 */
function baseCreate(prototype, properties) {
  return isObject(prototype) ? nativeCreate(prototype) : {};
}
// fallback for browsers without `Object.create`
if (!nativeCreate) {
  baseCreate = (function() {
    function Object() {}
    return function(prototype) {
      if (isObject(prototype)) {
        Object.prototype = prototype;
        var result = new Object;
        Object.prototype = null;
      }
      return result || global.Object();
    };
  }());
}

module.exports = baseCreate;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{"lodash._isnative":66,"lodash.isobject":83,"lodash.noop":85}],62:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var bind = require('lodash.bind'),
    identity = require('lodash.identity'),
    setBindData = require('lodash._setbinddata'),
    support = require('lodash.support');

/** Used to detected named functions */
var reFuncName = /^\s*function[ \n\r\t]+\w/;

/** Used to detect functions containing a `this` reference */
var reThis = /\bthis\b/;

/** Native method shortcuts */
var fnToString = Function.prototype.toString;

/**
 * The base implementation of `_.createCallback` without support for creating
 * "_.pluck" or "_.where" style callbacks.
 *
 * @private
 * @param {*} [func=identity] The value to convert to a callback.
 * @param {*} [thisArg] The `this` binding of the created callback.
 * @param {number} [argCount] The number of arguments the callback accepts.
 * @returns {Function} Returns a callback function.
 */
function baseCreateCallback(func, thisArg, argCount) {
  if (typeof func != 'function') {
    return identity;
  }
  // exit early for no `thisArg` or already bound by `Function#bind`
  if (typeof thisArg == 'undefined' || !('prototype' in func)) {
    return func;
  }
  var bindData = func.__bindData__;
  if (typeof bindData == 'undefined') {
    if (support.funcNames) {
      bindData = !func.name;
    }
    bindData = bindData || !support.funcDecomp;
    if (!bindData) {
      var source = fnToString.call(func);
      if (!support.funcNames) {
        bindData = !reFuncName.test(source);
      }
      if (!bindData) {
        // checks if `func` references the `this` keyword and stores the result
        bindData = reThis.test(source);
        setBindData(func, bindData);
      }
    }
  }
  // exit early if there are no `this` references or `func` is bound
  if (bindData === false || (bindData !== true && bindData[1] & 1)) {
    return func;
  }
  switch (argCount) {
    case 1: return function(value) {
      return func.call(thisArg, value);
    };
    case 2: return function(a, b) {
      return func.call(thisArg, a, b);
    };
    case 3: return function(value, index, collection) {
      return func.call(thisArg, value, index, collection);
    };
    case 4: return function(accumulator, value, index, collection) {
      return func.call(thisArg, accumulator, value, index, collection);
    };
  }
  return bind(func, thisArg);
}

module.exports = baseCreateCallback;

},{"lodash._setbinddata":70,"lodash.bind":74,"lodash.identity":79,"lodash.support":86}],63:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseCreate = require('lodash._basecreate'),
    isObject = require('lodash.isobject'),
    setBindData = require('lodash._setbinddata'),
    slice = require('lodash._slice');

/**
 * Used for `Array` method references.
 *
 * Normally `Array.prototype` would suffice, however, using an array literal
 * avoids issues in Narwhal.
 */
var arrayRef = [];

/** Native method shortcuts */
var push = arrayRef.push;

/**
 * The base implementation of `createWrapper` that creates the wrapper and
 * sets its meta data.
 *
 * @private
 * @param {Array} bindData The bind data array.
 * @returns {Function} Returns the new function.
 */
function baseCreateWrapper(bindData) {
  var func = bindData[0],
      bitmask = bindData[1],
      partialArgs = bindData[2],
      partialRightArgs = bindData[3],
      thisArg = bindData[4],
      arity = bindData[5];

  var isBind = bitmask & 1,
      isBindKey = bitmask & 2,
      isCurry = bitmask & 4,
      isCurryBound = bitmask & 8,
      key = func;

  function bound() {
    var thisBinding = isBind ? thisArg : this;
    if (partialArgs) {
      var args = slice(partialArgs);
      push.apply(args, arguments);
    }
    if (partialRightArgs || isCurry) {
      args || (args = slice(arguments));
      if (partialRightArgs) {
        push.apply(args, partialRightArgs);
      }
      if (isCurry && args.length < arity) {
        bitmask |= 16 & ~32;
        return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
      }
    }
    args || (args = arguments);
    if (isBindKey) {
      func = thisBinding[key];
    }
    if (this instanceof bound) {
      thisBinding = baseCreate(func.prototype);
      var result = func.apply(thisBinding, args);
      return isObject(result) ? result : thisBinding;
    }
    return func.apply(thisBinding, args);
  }
  setBindData(bound, bindData);
  return bound;
}

module.exports = baseCreateWrapper;

},{"lodash._basecreate":61,"lodash._setbinddata":70,"lodash._slice":72,"lodash.isobject":83}],64:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseBind = require('lodash._basebind'),
    baseCreateWrapper = require('lodash._basecreatewrapper'),
    isFunction = require('lodash.isfunction'),
    slice = require('lodash._slice');

/**
 * Used for `Array` method references.
 *
 * Normally `Array.prototype` would suffice, however, using an array literal
 * avoids issues in Narwhal.
 */
var arrayRef = [];

/** Native method shortcuts */
var push = arrayRef.push,
    unshift = arrayRef.unshift;

/**
 * Creates a function that, when called, either curries or invokes `func`
 * with an optional `this` binding and partially applied arguments.
 *
 * @private
 * @param {Function|string} func The function or method name to reference.
 * @param {number} bitmask The bitmask of method flags to compose.
 *  The bitmask may be composed of the following flags:
 *  1 - `_.bind`
 *  2 - `_.bindKey`
 *  4 - `_.curry`
 *  8 - `_.curry` (bound)
 *  16 - `_.partial`
 *  32 - `_.partialRight`
 * @param {Array} [partialArgs] An array of arguments to prepend to those
 *  provided to the new function.
 * @param {Array} [partialRightArgs] An array of arguments to append to those
 *  provided to the new function.
 * @param {*} [thisArg] The `this` binding of `func`.
 * @param {number} [arity] The arity of `func`.
 * @returns {Function} Returns the new function.
 */
function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
  var isBind = bitmask & 1,
      isBindKey = bitmask & 2,
      isCurry = bitmask & 4,
      isCurryBound = bitmask & 8,
      isPartial = bitmask & 16,
      isPartialRight = bitmask & 32;

  if (!isBindKey && !isFunction(func)) {
    throw new TypeError;
  }
  if (isPartial && !partialArgs.length) {
    bitmask &= ~16;
    isPartial = partialArgs = false;
  }
  if (isPartialRight && !partialRightArgs.length) {
    bitmask &= ~32;
    isPartialRight = partialRightArgs = false;
  }
  var bindData = func && func.__bindData__;
  if (bindData && bindData !== true) {
    // clone `bindData`
    bindData = slice(bindData);
    if (bindData[2]) {
      bindData[2] = slice(bindData[2]);
    }
    if (bindData[3]) {
      bindData[3] = slice(bindData[3]);
    }
    // set `thisBinding` is not previously bound
    if (isBind && !(bindData[1] & 1)) {
      bindData[4] = thisArg;
    }
    // set if previously bound but not currently (subsequent curried functions)
    if (!isBind && bindData[1] & 1) {
      bitmask |= 8;
    }
    // set curried arity if not yet set
    if (isCurry && !(bindData[1] & 4)) {
      bindData[5] = arity;
    }
    // append partial left arguments
    if (isPartial) {
      push.apply(bindData[2] || (bindData[2] = []), partialArgs);
    }
    // append partial right arguments
    if (isPartialRight) {
      unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs);
    }
    // merge flags
    bindData[1] |= bitmask;
    return createWrapper.apply(null, bindData);
  }
  // fast path for `_.bind`
  var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
  return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
}

module.exports = createWrapper;

},{"lodash._basebind":59,"lodash._basecreatewrapper":63,"lodash._slice":72,"lodash.isfunction":82}],65:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var arrayPool = require('lodash._arraypool');

/**
 * Gets an array from the array pool or creates a new one if the pool is empty.
 *
 * @private
 * @returns {Array} The array from the pool.
 */
function getArray() {
  return arrayPool.pop() || [];
}

module.exports = getArray;

},{"lodash._arraypool":58}],66:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/** Used for native method references */
var objectProto = Object.prototype;

/** Used to resolve the internal [[Class]] of values */
var toString = objectProto.toString;

/** Used to detect if a method is native */
var reNative = RegExp('^' +
  String(toString)
    .replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
    .replace(/toString| for [^\]]+/g, '.*?') + '$'
);

/**
 * Checks if `value` is a native function.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if the `value` is a native function, else `false`.
 */
function isNative(value) {
  return typeof value == 'function' && reNative.test(value);
}

module.exports = isNative;

},{}],67:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/** Used as the max size of the `arrayPool` and `objectPool` */
var maxPoolSize = 40;

module.exports = maxPoolSize;

},{}],68:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/** Used to determine if values are of the language type Object */
var objectTypes = {
  'boolean': false,
  'function': true,
  'object': true,
  'number': false,
  'string': false,
  'undefined': false
};

module.exports = objectTypes;

},{}],69:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var arrayPool = require('lodash._arraypool'),
    maxPoolSize = require('lodash._maxpoolsize');

/**
 * Releases the given array back to the array pool.
 *
 * @private
 * @param {Array} [array] The array to release.
 */
function releaseArray(array) {
  array.length = 0;
  if (arrayPool.length < maxPoolSize) {
    arrayPool.push(array);
  }
}

module.exports = releaseArray;

},{"lodash._arraypool":58,"lodash._maxpoolsize":67}],70:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var isNative = require('lodash._isnative'),
    noop = require('lodash.noop');

/** Used as the property descriptor for `__bindData__` */
var descriptor = {
  'configurable': false,
  'enumerable': false,
  'value': null,
  'writable': false
};

/** Used to set meta data on functions */
var defineProperty = (function() {
  // IE 8 only accepts DOM elements
  try {
    var o = {},
        func = isNative(func = Object.defineProperty) && func,
        result = func(o, o, o) && func;
  } catch(e) { }
  return result;
}());

/**
 * Sets `this` binding data on a given function.
 *
 * @private
 * @param {Function} func The function to set data on.
 * @param {Array} value The data array to set.
 */
var setBindData = !defineProperty ? noop : function(func, value) {
  descriptor.value = value;
  defineProperty(func, '__bindData__', descriptor);
};

module.exports = setBindData;

},{"lodash._isnative":66,"lodash.noop":85}],71:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var objectTypes = require('lodash._objecttypes');

/** Used for native method references */
var objectProto = Object.prototype;

/** Native method shortcuts */
var hasOwnProperty = objectProto.hasOwnProperty;

/**
 * A fallback implementation of `Object.keys` which produces an array of the
 * given object's own enumerable property names.
 *
 * @private
 * @type Function
 * @param {Object} object The object to inspect.
 * @returns {Array} Returns an array of property names.
 */
var shimKeys = function(object) {
  var index, iterable = object, result = [];
  if (!iterable) return result;
  if (!(objectTypes[typeof object])) return result;
    for (index in iterable) {
      if (hasOwnProperty.call(iterable, index)) {
        result.push(index);
      }
    }
  return result
};

module.exports = shimKeys;

},{"lodash._objecttypes":68}],72:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/**
 * Slices the `collection` from the `start` index up to, but not including,
 * the `end` index.
 *
 * Note: This function is used instead of `Array#slice` to support node lists
 * in IE < 9 and to ensure dense arrays are returned.
 *
 * @private
 * @param {Array|Object|string} collection The collection to slice.
 * @param {number} start The start index.
 * @param {number} end The end index.
 * @returns {Array} Returns the new array.
 */
function slice(array, start, end) {
  start || (start = 0);
  if (typeof end == 'undefined') {
    end = array ? array.length : 0;
  }
  var index = -1,
      length = end - start || 0,
      result = Array(length < 0 ? 0 : length);

  while (++index < length) {
    result[index] = array[start + index];
  }
  return result;
}

module.exports = slice;

},{}],73:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseCreateCallback = require('lodash._basecreatecallback'),
    keys = require('lodash.keys'),
    objectTypes = require('lodash._objecttypes');

/**
 * Assigns own enumerable properties of source object(s) to the destination
 * object. Subsequent sources will overwrite property assignments of previous
 * sources. If a callback is provided it will be executed to produce the
 * assigned values. The callback is bound to `thisArg` and invoked with two
 * arguments; (objectValue, sourceValue).
 *
 * @static
 * @memberOf _
 * @type Function
 * @alias extend
 * @category Objects
 * @param {Object} object The destination object.
 * @param {...Object} [source] The source objects.
 * @param {Function} [callback] The function to customize assigning values.
 * @param {*} [thisArg] The `this` binding of `callback`.
 * @returns {Object} Returns the destination object.
 * @example
 *
 * _.assign({ 'name': 'fred' }, { 'employer': 'slate' });
 * // => { 'name': 'fred', 'employer': 'slate' }
 *
 * var defaults = _.partialRight(_.assign, function(a, b) {
 *   return typeof a == 'undefined' ? b : a;
 * });
 *
 * var object = { 'name': 'barney' };
 * defaults(object, { 'name': 'fred', 'employer': 'slate' });
 * // => { 'name': 'barney', 'employer': 'slate' }
 */
var assign = function(object, source, guard) {
  var index, iterable = object, result = iterable;
  if (!iterable) return result;
  var args = arguments,
      argsIndex = 0,
      argsLength = typeof guard == 'number' ? 2 : args.length;
  if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {
    var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);
  } else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {
    callback = args[--argsLength];
  }
  while (++argsIndex < argsLength) {
    iterable = args[argsIndex];
    if (iterable && objectTypes[typeof iterable]) {
    var ownIndex = -1,
        ownProps = objectTypes[typeof iterable] && keys(iterable),
        length = ownProps ? ownProps.length : 0;

    while (++ownIndex < length) {
      index = ownProps[ownIndex];
      result[index] = callback ? callback(result[index], iterable[index]) : iterable[index];
    }
    }
  }
  return result
};

module.exports = assign;

},{"lodash._basecreatecallback":62,"lodash._objecttypes":68,"lodash.keys":84}],74:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var createWrapper = require('lodash._createwrapper'),
    slice = require('lodash._slice');

/**
 * Creates a function that, when called, invokes `func` with the `this`
 * binding of `thisArg` and prepends any additional `bind` arguments to those
 * provided to the bound function.
 *
 * @static
 * @memberOf _
 * @category Functions
 * @param {Function} func The function to bind.
 * @param {*} [thisArg] The `this` binding of `func`.
 * @param {...*} [arg] Arguments to be partially applied.
 * @returns {Function} Returns the new bound function.
 * @example
 *
 * var func = function(greeting) {
 *   return greeting + ' ' + this.name;
 * };
 *
 * func = _.bind(func, { 'name': 'fred' }, 'hi');
 * func();
 * // => 'hi fred'
 */
function bind(func, thisArg) {
  return arguments.length > 2
    ? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
    : createWrapper(func, 1, null, null, thisArg);
}

module.exports = bind;

},{"lodash._createwrapper":64,"lodash._slice":72}],75:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseClone = require('lodash._baseclone'),
    baseCreateCallback = require('lodash._basecreatecallback');

/**
 * Creates a deep clone of `value`. If a callback is provided it will be
 * executed to produce the cloned values. If the callback returns `undefined`
 * cloning will be handled by the method instead. The callback is bound to
 * `thisArg` and invoked with one argument; (value).
 *
 * Note: This method is loosely based on the structured clone algorithm. Functions
 * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
 * objects created by constructors other than `Object` are cloned to plain `Object` objects.
 * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
 *
 * @static
 * @memberOf _
 * @category Objects
 * @param {*} value The value to deep clone.
 * @param {Function} [callback] The function to customize cloning values.
 * @param {*} [thisArg] The `this` binding of `callback`.
 * @returns {*} Returns the deep cloned value.
 * @example
 *
 * var characters = [
 *   { 'name': 'barney', 'age': 36 },
 *   { 'name': 'fred',   'age': 40 }
 * ];
 *
 * var deep = _.cloneDeep(characters);
 * deep[0] === characters[0];
 * // => false
 *
 * var view = {
 *   'label': 'docs',
 *   'node': element
 * };
 *
 * var clone = _.cloneDeep(view, function(value) {
 *   return _.isElement(value) ? value.cloneNode(true) : undefined;
 * });
 *
 * clone.node == view.node;
 * // => false
 */
function cloneDeep(value, callback, thisArg) {
  return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
}

module.exports = cloneDeep;

},{"lodash._baseclone":60,"lodash._basecreatecallback":62}],76:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseCreateCallback = require('lodash._basecreatecallback'),
    forOwn = require('lodash.forown');

/**
 * Iterates over elements of a collection, executing the callback for each
 * element. The callback is bound to `thisArg` and invoked with three arguments;
 * (value, index|key, collection). Callbacks may exit iteration early by
 * explicitly returning `false`.
 *
 * Note: As with other "Collections" methods, objects with a `length` property
 * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`
 * may be used for object iteration.
 *
 * @static
 * @memberOf _
 * @alias each
 * @category Collections
 * @param {Array|Object|string} collection The collection to iterate over.
 * @param {Function} [callback=identity] The function called per iteration.
 * @param {*} [thisArg] The `this` binding of `callback`.
 * @returns {Array|Object|string} Returns `collection`.
 * @example
 *
 * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(',');
 * // => logs each number and returns '1,2,3'
 *
 * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); });
 * // => logs each number and returns the object (property order is not guaranteed across environments)
 */
function forEach(collection, callback, thisArg) {
  var index = -1,
      length = collection ? collection.length : 0;

  callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
  if (typeof length == 'number') {
    while (++index < length) {
      if (callback(collection[index], index, collection) === false) {
        break;
      }
    }
  } else {
    forOwn(collection, callback);
  }
  return collection;
}

module.exports = forEach;

},{"lodash._basecreatecallback":62,"lodash.forown":77}],77:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var baseCreateCallback = require('lodash._basecreatecallback'),
    keys = require('lodash.keys'),
    objectTypes = require('lodash._objecttypes');

/**
 * Iterates over own enumerable properties of an object, executing the callback
 * for each property. The callback is bound to `thisArg` and invoked with three
 * arguments; (value, key, object). Callbacks may exit iteration early by
 * explicitly returning `false`.
 *
 * @static
 * @memberOf _
 * @type Function
 * @category Objects
 * @param {Object} object The object to iterate over.
 * @param {Function} [callback=identity] The function called per iteration.
 * @param {*} [thisArg] The `this` binding of `callback`.
 * @returns {Object} Returns `object`.
 * @example
 *
 * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
 *   console.log(key);
 * });
 * // => logs '0', '1', and 'length' (property order is not guaranteed across environments)
 */
var forOwn = function(collection, callback, thisArg) {
  var index, iterable = collection, result = iterable;
  if (!iterable) return result;
  if (!objectTypes[typeof iterable]) return result;
  callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
    var ownIndex = -1,
        ownProps = objectTypes[typeof iterable] && keys(iterable),
        length = ownProps ? ownProps.length : 0;

    while (++ownIndex < length) {
      index = ownProps[ownIndex];
      if (callback(iterable[index], index, collection) === false) return result;
    }
  return result
};

module.exports = forOwn;

},{"lodash._basecreatecallback":62,"lodash._objecttypes":68,"lodash.keys":84}],78:[function(require,module,exports){
(function (global){
/**
 * lodash (Custom Build) <https://lodash.com/>
 * Build: `lodash modularize exports="npm" -o ./`
 * Copyright jQuery Foundation and other contributors <https://jquery.org/>
 * Released under MIT license <https://lodash.com/license>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 */

/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function';

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';

/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0;

/** `Object#toString` result references. */
var funcTag = '[object Function]',
    genTag = '[object GeneratorFunction]',
    symbolTag = '[object Symbol]';

/** Used to match property names within property paths. */
var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
    reIsPlainProp = /^\w*$/,
    reLeadingDot = /^\./,
    rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;

/**
 * Used to match `RegExp`
 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
 */
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

/** Used to match backslashes in property paths. */
var reEscapeChar = /\\(\\)?/g;

/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;

/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
var root = freeGlobal || freeSelf || Function('return this')();

/**
 * Gets the value at `key` of `object`.
 *
 * @private
 * @param {Object} [object] The object to query.
 * @param {string} key The key of the property to get.
 * @returns {*} Returns the property value.
 */
function getValue(object, key) {
  return object == null ? undefined : object[key];
}

/**
 * Checks if `value` is a host object in IE < 9.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
 */
function isHostObject(value) {
  // Many host objects are `Object` objects that can coerce to strings
  // despite having improperly defined `toString` methods.
  var result = false;
  if (value != null && typeof value.toString != 'function') {
    try {
      result = !!(value + '');
    } catch (e) {}
  }
  return result;
}

/** Used for built-in method references. */
var arrayProto = Array.prototype,
    funcProto = Function.prototype,
    objectProto = Object.prototype;

/** Used to detect overreaching core-js shims. */
var coreJsData = root['__core-js_shared__'];

/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
  return uid ? ('Symbol(src)_1.' + uid) : '';
}());

/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;

/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var objectToString = objectProto.toString;

/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);

/** Built-in value references. */
var Symbol = root.Symbol,
    splice = arrayProto.splice;

/* Built-in method references that are verified to be native. */
var Map = getNative(root, 'Map'),
    nativeCreate = getNative(Object, 'create');

/** Used to convert symbols to primitives and strings. */
var symbolProto = Symbol ? Symbol.prototype : undefined,
    symbolToString = symbolProto ? symbolProto.toString : undefined;

/**
 * Creates a hash object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function Hash(entries) {
  var index = -1,
      length = entries ? entries.length : 0;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

/**
 * Removes all key-value entries from the hash.
 *
 * @private
 * @name clear
 * @memberOf Hash
 */
function hashClear() {
  this.__data__ = nativeCreate ? nativeCreate(null) : {};
}

/**
 * Removes `key` and its value from the hash.
 *
 * @private
 * @name delete
 * @memberOf Hash
 * @param {Object} hash The hash to modify.
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function hashDelete(key) {
  return this.has(key) && delete this.__data__[key];
}

/**
 * Gets the hash value for `key`.
 *
 * @private
 * @name get
 * @memberOf Hash
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function hashGet(key) {
  var data = this.__data__;
  if (nativeCreate) {
    var result = data[key];
    return result === HASH_UNDEFINED ? undefined : result;
  }
  return hasOwnProperty.call(data, key) ? data[key] : undefined;
}

/**
 * Checks if a hash value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf Hash
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function hashHas(key) {
  var data = this.__data__;
  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
}

/**
 * Sets the hash `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf Hash
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the hash instance.
 */
function hashSet(key, value) {
  var data = this.__data__;
  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
  return this;
}

// Add methods to `Hash`.
Hash.prototype.clear = hashClear;
Hash.prototype['delete'] = hashDelete;
Hash.prototype.get = hashGet;
Hash.prototype.has = hashHas;
Hash.prototype.set = hashSet;

/**
 * Creates an list cache object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function ListCache(entries) {
  var index = -1,
      length = entries ? entries.length : 0;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

/**
 * Removes all key-value entries from the list cache.
 *
 * @private
 * @name clear
 * @memberOf ListCache
 */
function listCacheClear() {
  this.__data__ = [];
}

/**
 * Removes `key` and its value from the list cache.
 *
 * @private
 * @name delete
 * @memberOf ListCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function listCacheDelete(key) {
  var data = this.__data__,
      index = assocIndexOf(data, key);

  if (index < 0) {
    return false;
  }
  var lastIndex = data.length - 1;
  if (index == lastIndex) {
    data.pop();
  } else {
    splice.call(data, index, 1);
  }
  return true;
}

/**
 * Gets the list cache value for `key`.
 *
 * @private
 * @name get
 * @memberOf ListCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function listCacheGet(key) {
  var data = this.__data__,
      index = assocIndexOf(data, key);

  return index < 0 ? undefined : data[index][1];
}

/**
 * Checks if a list cache value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf ListCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function listCacheHas(key) {
  return assocIndexOf(this.__data__, key) > -1;
}

/**
 * Sets the list cache `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf ListCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the list cache instance.
 */
function listCacheSet(key, value) {
  var data = this.__data__,
      index = assocIndexOf(data, key);

  if (index < 0) {
    data.push([key, value]);
  } else {
    data[index][1] = value;
  }
  return this;
}

// Add methods to `ListCache`.
ListCache.prototype.clear = listCacheClear;
ListCache.prototype['delete'] = listCacheDelete;
ListCache.prototype.get = listCacheGet;
ListCache.prototype.has = listCacheHas;
ListCache.prototype.set = listCacheSet;

/**
 * Creates a map cache object to store key-value pairs.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function MapCache(entries) {
  var index = -1,
      length = entries ? entries.length : 0;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

/**
 * Removes all key-value entries from the map.
 *
 * @private
 * @name clear
 * @memberOf MapCache
 */
function mapCacheClear() {
  this.__data__ = {
    'hash': new Hash,
    'map': new (Map || ListCache),
    'string': new Hash
  };
}

/**
 * Removes `key` and its value from the map.
 *
 * @private
 * @name delete
 * @memberOf MapCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function mapCacheDelete(key) {
  return getMapData(this, key)['delete'](key);
}

/**
 * Gets the map value for `key`.
 *
 * @private
 * @name get
 * @memberOf MapCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function mapCacheGet(key) {
  return getMapData(this, key).get(key);
}

/**
 * Checks if a map value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf MapCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function mapCacheHas(key) {
  return getMapData(this, key).has(key);
}

/**
 * Sets the map `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf MapCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the map cache instance.
 */
function mapCacheSet(key, value) {
  getMapData(this, key).set(key, value);
  return this;
}

// Add methods to `MapCache`.
MapCache.prototype.clear = mapCacheClear;
MapCache.prototype['delete'] = mapCacheDelete;
MapCache.prototype.get = mapCacheGet;
MapCache.prototype.has = mapCacheHas;
MapCache.prototype.set = mapCacheSet;

/**
 * Gets the index at which the `key` is found in `array` of key-value pairs.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} key The key to search for.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function assocIndexOf(array, key) {
  var length = array.length;
  while (length--) {
    if (eq(array[length][0], key)) {
      return length;
    }
  }
  return -1;
}

/**
 * The base implementation of `_.get` without support for default values.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {Array|string} path The path of the property to get.
 * @returns {*} Returns the resolved value.
 */
function baseGet(object, path) {
  path = isKey(path, object) ? [path] : castPath(path);

  var index = 0,
      length = path.length;

  while (object != null && index < length) {
    object = object[toKey(path[index++])];
  }
  return (index && index == length) ? object : undefined;
}

/**
 * The base implementation of `_.isNative` without bad shim checks.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a native function,
 *  else `false`.
 */
function baseIsNative(value) {
  if (!isObject(value) || isMasked(value)) {
    return false;
  }
  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
  return pattern.test(toSource(value));
}

/**
 * The base implementation of `_.toString` which doesn't convert nullish
 * values to empty strings.
 *
 * @private
 * @param {*} value The value to process.
 * @returns {string} Returns the string.
 */
function baseToString(value) {
  // Exit early for strings to avoid a performance hit in some environments.
  if (typeof value == 'string') {
    return value;
  }
  if (isSymbol(value)) {
    return symbolToString ? symbolToString.call(value) : '';
  }
  var result = (value + '');
  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}

/**
 * Casts `value` to a path array if it's not one.
 *
 * @private
 * @param {*} value The value to inspect.
 * @returns {Array} Returns the cast property path array.
 */
function castPath(value) {
  return isArray(value) ? value : stringToPath(value);
}

/**
 * Gets the data for `map`.
 *
 * @private
 * @param {Object} map The map to query.
 * @param {string} key The reference key.
 * @returns {*} Returns the map data.
 */
function getMapData(map, key) {
  var data = map.__data__;
  return isKeyable(key)
    ? data[typeof key == 'string' ? 'string' : 'hash']
    : data.map;
}

/**
 * Gets the native function at `key` of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {string} key The key of the method to get.
 * @returns {*} Returns the function if it's native, else `undefined`.
 */
function getNative(object, key) {
  var value = getValue(object, key);
  return baseIsNative(value) ? value : undefined;
}

/**
 * Checks if `value` is a property name and not a property path.
 *
 * @private
 * @param {*} value The value to check.
 * @param {Object} [object] The object to query keys on.
 * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
 */
function isKey(value, object) {
  if (isArray(value)) {
    return false;
  }
  var type = typeof value;
  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
      value == null || isSymbol(value)) {
    return true;
  }
  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
    (object != null && value in Object(object));
}

/**
 * Checks if `value` is suitable for use as unique object key.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
 */
function isKeyable(value) {
  var type = typeof value;
  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
    ? (value !== '__proto__')
    : (value === null);
}

/**
 * Checks if `func` has its source masked.
 *
 * @private
 * @param {Function} func The function to check.
 * @returns {boolean} Returns `true` if `func` is masked, else `false`.
 */
function isMasked(func) {
  return !!maskSrcKey && (maskSrcKey in func);
}

/**
 * Converts `string` to a property path array.
 *
 * @private
 * @param {string} string The string to convert.
 * @returns {Array} Returns the property path array.
 */
var stringToPath = memoize(function(string) {
  string = toString(string);

  var result = [];
  if (reLeadingDot.test(string)) {
    result.push('');
  }
  string.replace(rePropName, function(match, number, quote, string) {
    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
  });
  return result;
});

/**
 * Converts `value` to a string key if it's not a string or symbol.
 *
 * @private
 * @param {*} value The value to inspect.
 * @returns {string|symbol} Returns the key.
 */
function toKey(value) {
  if (typeof value == 'string' || isSymbol(value)) {
    return value;
  }
  var result = (value + '');
  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}

/**
 * Converts `func` to its source code.
 *
 * @private
 * @param {Function} func The function to process.
 * @returns {string} Returns the source code.
 */
function toSource(func) {
  if (func != null) {
    try {
      return funcToString.call(func);
    } catch (e) {}
    try {
      return (func + '');
    } catch (e) {}
  }
  return '';
}

/**
 * Creates a function that memoizes the result of `func`. If `resolver` is
 * provided, it determines the cache key for storing the result based on the
 * arguments provided to the memoized function. By default, the first argument
 * provided to the memoized function is used as the map cache key. The `func`
 * is invoked with the `this` binding of the memoized function.
 *
 * **Note:** The cache is exposed as the `cache` property on the memoized
 * function. Its creation may be customized by replacing the `_.memoize.Cache`
 * constructor with one whose instances implement the
 * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
 * method interface of `delete`, `get`, `has`, and `set`.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Function
 * @param {Function} func The function to have its output memoized.
 * @param {Function} [resolver] The function to resolve the cache key.
 * @returns {Function} Returns the new memoized function.
 * @example
 *
 * var object = { 'a': 1, 'b': 2 };
 * var other = { 'c': 3, 'd': 4 };
 *
 * var values = _.memoize(_.values);
 * values(object);
 * // => [1, 2]
 *
 * values(other);
 * // => [3, 4]
 *
 * object.a = 2;
 * values(object);
 * // => [1, 2]
 *
 * // Modify the result cache.
 * values.cache.set(object, ['a', 'b']);
 * values(object);
 * // => ['a', 'b']
 *
 * // Replace `_.memoize.Cache`.
 * _.memoize.Cache = WeakMap;
 */
function memoize(func, resolver) {
  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
    throw new TypeError(FUNC_ERROR_TEXT);
  }
  var memoized = function() {
    var args = arguments,
        key = resolver ? resolver.apply(this, args) : args[0],
        cache = memoized.cache;

    if (cache.has(key)) {
      return cache.get(key);
    }
    var result = func.apply(this, args);
    memoized.cache = cache.set(key, result);
    return result;
  };
  memoized.cache = new (memoize.Cache || MapCache);
  return memoized;
}

// Assign cache to `_.memoize`.
memoize.Cache = MapCache;

/**
 * Performs a
 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
 * comparison between two values to determine if they are equivalent.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
 * @example
 *
 * var object = { 'a': 1 };
 * var other = { 'a': 1 };
 *
 * _.eq(object, object);
 * // => true
 *
 * _.eq(object, other);
 * // => false
 *
 * _.eq('a', 'a');
 * // => true
 *
 * _.eq('a', Object('a'));
 * // => false
 *
 * _.eq(NaN, NaN);
 * // => true
 */
function eq(value, other) {
  return value === other || (value !== value && other !== other);
}

/**
 * Checks if `value` is classified as an `Array` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
 * @example
 *
 * _.isArray([1, 2, 3]);
 * // => true
 *
 * _.isArray(document.body.children);
 * // => false
 *
 * _.isArray('abc');
 * // => false
 *
 * _.isArray(_.noop);
 * // => false
 */
var isArray = Array.isArray;

/**
 * Checks if `value` is classified as a `Function` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
 * @example
 *
 * _.isFunction(_);
 * // => true
 *
 * _.isFunction(/abc/);
 * // => false
 */
function isFunction(value) {
  // The use of `Object#toString` avoids issues with the `typeof` operator
  // in Safari 8-9 which returns 'object' for typed array and other constructors.
  var tag = isObject(value) ? objectToString.call(value) : '';
  return tag == funcTag || tag == genTag;
}

/**
 * Checks if `value` is the
 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
 * @example
 *
 * _.isObject({});
 * // => true
 *
 * _.isObject([1, 2, 3]);
 * // => true
 *
 * _.isObject(_.noop);
 * // => true
 *
 * _.isObject(null);
 * // => false
 */
function isObject(value) {
  var type = typeof value;
  return !!value && (type == 'object' || type == 'function');
}

/**
 * Checks if `value` is object-like. A value is object-like if it's not `null`
 * and has a `typeof` result of "object".
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
 * @example
 *
 * _.isObjectLike({});
 * // => true
 *
 * _.isObjectLike([1, 2, 3]);
 * // => true
 *
 * _.isObjectLike(_.noop);
 * // => false
 *
 * _.isObjectLike(null);
 * // => false
 */
function isObjectLike(value) {
  return !!value && typeof value == 'object';
}

/**
 * Checks if `value` is classified as a `Symbol` primitive or object.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
 * @example
 *
 * _.isSymbol(Symbol.iterator);
 * // => true
 *
 * _.isSymbol('abc');
 * // => false
 */
function isSymbol(value) {
  return typeof value == 'symbol' ||
    (isObjectLike(value) && objectToString.call(value) == symbolTag);
}

/**
 * Converts `value` to a string. An empty string is returned for `null`
 * and `undefined` values. The sign of `-0` is preserved.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to process.
 * @returns {string} Returns the string.
 * @example
 *
 * _.toString(null);
 * // => ''
 *
 * _.toString(-0);
 * // => '-0'
 *
 * _.toString([1, 2, 3]);
 * // => '1,2,3'
 */
function toString(value) {
  return value == null ? '' : baseToString(value);
}

/**
 * Gets the value at `path` of `object`. If the resolved value is
 * `undefined`, the `defaultValue` is returned in its place.
 *
 * @static
 * @memberOf _
 * @since 3.7.0
 * @category Object
 * @param {Object} object The object to query.
 * @param {Array|string} path The path of the property to get.
 * @param {*} [defaultValue] The value returned for `undefined` resolved values.
 * @returns {*} Returns the resolved value.
 * @example
 *
 * var object = { 'a': [{ 'b': { 'c': 3 } }] };
 *
 * _.get(object, 'a[0].b.c');
 * // => 3
 *
 * _.get(object, ['a', '0', 'b', 'c']);
 * // => 3
 *
 * _.get(object, 'a.b.c', 'default');
 * // => 'default'
 */
function get(object, path, defaultValue) {
  var result = object == null ? undefined : baseGet(object, path);
  return result === undefined ? defaultValue : result;
}

module.exports = get;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],79:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/**
 * This method returns the first argument provided to it.
 *
 * @static
 * @memberOf _
 * @category Utilities
 * @param {*} value Any value.
 * @returns {*} Returns `value`.
 * @example
 *
 * var object = { 'name': 'fred' };
 * _.identity(object) === object;
 * // => true
 */
function identity(value) {
  return value;
}

module.exports = identity;

},{}],80:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var isNative = require('lodash._isnative');

/** `Object#toString` result shortcuts */
var arrayClass = '[object Array]';

/** Used for native method references */
var objectProto = Object.prototype;

/** Used to resolve the internal [[Class]] of values */
var toString = objectProto.toString;

/* Native method shortcuts for methods with the same name as other `lodash` methods */
var nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray;

/**
 * Checks if `value` is an array.
 *
 * @static
 * @memberOf _
 * @type Function
 * @category Objects
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if the `value` is an array, else `false`.
 * @example
 *
 * (function() { return _.isArray(arguments); })();
 * // => false
 *
 * _.isArray([1, 2, 3]);
 * // => true
 */
var isArray = nativeIsArray || function(value) {
  return value && typeof value == 'object' && typeof value.length == 'number' &&
    toString.call(value) == arrayClass || false;
};

module.exports = isArray;

},{"lodash._isnative":66}],81:[function(require,module,exports){
(function (global){
/**
 * Lodash (Custom Build) <https://lodash.com/>
 * Build: `lodash modularize exports="npm" -o ./`
 * Copyright JS Foundation and other contributors <https://js.foundation/>
 * Released under MIT license <https://lodash.com/license>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 */

/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE = 200;

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';

/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG = 1,
    COMPARE_UNORDERED_FLAG = 2;

/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991;

/** `Object#toString` result references. */
var argsTag = '[object Arguments]',
    arrayTag = '[object Array]',
    asyncTag = '[object AsyncFunction]',
    boolTag = '[object Boolean]',
    dateTag = '[object Date]',
    errorTag = '[object Error]',
    funcTag = '[object Function]',
    genTag = '[object GeneratorFunction]',
    mapTag = '[object Map]',
    numberTag = '[object Number]',
    nullTag = '[object Null]',
    objectTag = '[object Object]',
    promiseTag = '[object Promise]',
    proxyTag = '[object Proxy]',
    regexpTag = '[object RegExp]',
    setTag = '[object Set]',
    stringTag = '[object String]',
    symbolTag = '[object Symbol]',
    undefinedTag = '[object Undefined]',
    weakMapTag = '[object WeakMap]';

var arrayBufferTag = '[object ArrayBuffer]',
    dataViewTag = '[object DataView]',
    float32Tag = '[object Float32Array]',
    float64Tag = '[object Float64Array]',
    int8Tag = '[object Int8Array]',
    int16Tag = '[object Int16Array]',
    int32Tag = '[object Int32Array]',
    uint8Tag = '[object Uint8Array]',
    uint8ClampedTag = '[object Uint8ClampedArray]',
    uint16Tag = '[object Uint16Array]',
    uint32Tag = '[object Uint32Array]';

/**
 * Used to match `RegExp`
 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
 */
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;

/** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/;

/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
typedArrayTags[uint32Tag] = true;
typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
typedArrayTags[errorTag] = typedArrayTags[funcTag] =
typedArrayTags[mapTag] = typedArrayTags[numberTag] =
typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
typedArrayTags[setTag] = typedArrayTags[stringTag] =
typedArrayTags[weakMapTag] = false;

/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
var root = freeGlobal || freeSelf || Function('return this')();

/** Detect free variable `exports`. */
var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Detect free variable `process` from Node.js. */
var freeProcess = moduleExports && freeGlobal.process;

/** Used to access faster Node.js helpers. */
var nodeUtil = (function() {
  try {
    return freeProcess && freeProcess.binding && freeProcess.binding('util');
  } catch (e) {}
}());

/* Node.js helper references. */
var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;

/**
 * A specialized version of `_.filter` for arrays without support for
 * iteratee shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} predicate The function invoked per iteration.
 * @returns {Array} Returns the new filtered array.
 */
function arrayFilter(array, predicate) {
  var index = -1,
      length = array == null ? 0 : array.length,
      resIndex = 0,
      result = [];

  while (++index < length) {
    var value = array[index];
    if (predicate(value, index, array)) {
      result[resIndex++] = value;
    }
  }
  return result;
}

/**
 * Appends the elements of `values` to `array`.
 *
 * @private
 * @param {Array} array The array to modify.
 * @param {Array} values The values to append.
 * @returns {Array} Returns `array`.
 */
function arrayPush(array, values) {
  var index = -1,
      length = values.length,
      offset = array.length;

  while (++index < length) {
    array[offset + index] = values[index];
  }
  return array;
}

/**
 * A specialized version of `_.some` for arrays without support for iteratee
 * shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} predicate The function invoked per iteration.
 * @returns {boolean} Returns `true` if any element passes the predicate check,
 *  else `false`.
 */
function arraySome(array, predicate) {
  var index = -1,
      length = array == null ? 0 : array.length;

  while (++index < length) {
    if (predicate(array[index], index, array)) {
      return true;
    }
  }
  return false;
}

/**
 * The base implementation of `_.times` without support for iteratee shorthands
 * or max array length checks.
 *
 * @private
 * @param {number} n The number of times to invoke `iteratee`.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the array of results.
 */
function baseTimes(n, iteratee) {
  var index = -1,
      result = Array(n);

  while (++index < n) {
    result[index] = iteratee(index);
  }
  return result;
}

/**
 * The base implementation of `_.unary` without support for storing metadata.
 *
 * @private
 * @param {Function} func The function to cap arguments for.
 * @returns {Function} Returns the new capped function.
 */
function baseUnary(func) {
  return function(value) {
    return func(value);
  };
}

/**
 * Checks if a `cache` value for `key` exists.
 *
 * @private
 * @param {Object} cache The cache to query.
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function cacheHas(cache, key) {
  return cache.has(key);
}

/**
 * Gets the value at `key` of `object`.
 *
 * @private
 * @param {Object} [object] The object to query.
 * @param {string} key The key of the property to get.
 * @returns {*} Returns the property value.
 */
function getValue(object, key) {
  return object == null ? undefined : object[key];
}

/**
 * Converts `map` to its key-value pairs.
 *
 * @private
 * @param {Object} map The map to convert.
 * @returns {Array} Returns the key-value pairs.
 */
function mapToArray(map) {
  var index = -1,
      result = Array(map.size);

  map.forEach(function(value, key) {
    result[++index] = [key, value];
  });
  return result;
}

/**
 * Creates a unary function that invokes `func` with its argument transformed.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {Function} transform The argument transform.
 * @returns {Function} Returns the new function.
 */
function overArg(func, transform) {
  return function(arg) {
    return func(transform(arg));
  };
}

/**
 * Converts `set` to an array of its values.
 *
 * @private
 * @param {Object} set The set to convert.
 * @returns {Array} Returns the values.
 */
function setToArray(set) {
  var index = -1,
      result = Array(set.size);

  set.forEach(function(value) {
    result[++index] = value;
  });
  return result;
}

/** Used for built-in method references. */
var arrayProto = Array.prototype,
    funcProto = Function.prototype,
    objectProto = Object.prototype;

/** Used to detect overreaching core-js shims. */
var coreJsData = root['__core-js_shared__'];

/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;

/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;

/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
  return uid ? ('Symbol(src)_1.' + uid) : '';
}());

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString = objectProto.toString;

/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);

/** Built-in value references. */
var Buffer = moduleExports ? root.Buffer : undefined,
    Symbol = root.Symbol,
    Uint8Array = root.Uint8Array,
    propertyIsEnumerable = objectProto.propertyIsEnumerable,
    splice = arrayProto.splice,
    symToStringTag = Symbol ? Symbol.toStringTag : undefined;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeGetSymbols = Object.getOwnPropertySymbols,
    nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
    nativeKeys = overArg(Object.keys, Object);

/* Built-in method references that are verified to be native. */
var DataView = getNative(root, 'DataView'),
    Map = getNative(root, 'Map'),
    Promise = getNative(root, 'Promise'),
    Set = getNative(root, 'Set'),
    WeakMap = getNative(root, 'WeakMap'),
    nativeCreate = getNative(Object, 'create');

/** Used to detect maps, sets, and weakmaps. */
var dataViewCtorString = toSource(DataView),
    mapCtorString = toSource(Map),
    promiseCtorString = toSource(Promise),
    setCtorString = toSource(Set),
    weakMapCtorString = toSource(WeakMap);

/** Used to convert symbols to primitives and strings. */
var symbolProto = Symbol ? Symbol.prototype : undefined,
    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;

/**
 * Creates a hash object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function Hash(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

/**
 * Removes all key-value entries from the hash.
 *
 * @private
 * @name clear
 * @memberOf Hash
 */
function hashClear() {
  this.__data__ = nativeCreate ? nativeCreate(null) : {};
  this.size = 0;
}

/**
 * Removes `key` and its value from the hash.
 *
 * @private
 * @name delete
 * @memberOf Hash
 * @param {Object} hash The hash to modify.
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function hashDelete(key) {
  var result = this.has(key) && delete this.__data__[key];
  this.size -= result ? 1 : 0;
  return result;
}

/**
 * Gets the hash value for `key`.
 *
 * @private
 * @name get
 * @memberOf Hash
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function hashGet(key) {
  var data = this.__data__;
  if (nativeCreate) {
    var result = data[key];
    return result === HASH_UNDEFINED ? undefined : result;
  }
  return hasOwnProperty.call(data, key) ? data[key] : undefined;
}

/**
 * Checks if a hash value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf Hash
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function hashHas(key) {
  var data = this.__data__;
  return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
}

/**
 * Sets the hash `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf Hash
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the hash instance.
 */
function hashSet(key, value) {
  var data = this.__data__;
  this.size += this.has(key) ? 0 : 1;
  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
  return this;
}

// Add methods to `Hash`.
Hash.prototype.clear = hashClear;
Hash.prototype['delete'] = hashDelete;
Hash.prototype.get = hashGet;
Hash.prototype.has = hashHas;
Hash.prototype.set = hashSet;

/**
 * Creates an list cache object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function ListCache(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

/**
 * Removes all key-value entries from the list cache.
 *
 * @private
 * @name clear
 * @memberOf ListCache
 */
function listCacheClear() {
  this.__data__ = [];
  this.size = 0;
}

/**
 * Removes `key` and its value from the list cache.
 *
 * @private
 * @name delete
 * @memberOf ListCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function listCacheDelete(key) {
  var data = this.__data__,
      index = assocIndexOf(data, key);

  if (index < 0) {
    return false;
  }
  var lastIndex = data.length - 1;
  if (index == lastIndex) {
    data.pop();
  } else {
    splice.call(data, index, 1);
  }
  --this.size;
  return true;
}

/**
 * Gets the list cache value for `key`.
 *
 * @private
 * @name get
 * @memberOf ListCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function listCacheGet(key) {
  var data = this.__data__,
      index = assocIndexOf(data, key);

  return index < 0 ? undefined : data[index][1];
}

/**
 * Checks if a list cache value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf ListCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function listCacheHas(key) {
  return assocIndexOf(this.__data__, key) > -1;
}

/**
 * Sets the list cache `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf ListCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the list cache instance.
 */
function listCacheSet(key, value) {
  var data = this.__data__,
      index = assocIndexOf(data, key);

  if (index < 0) {
    ++this.size;
    data.push([key, value]);
  } else {
    data[index][1] = value;
  }
  return this;
}

// Add methods to `ListCache`.
ListCache.prototype.clear = listCacheClear;
ListCache.prototype['delete'] = listCacheDelete;
ListCache.prototype.get = listCacheGet;
ListCache.prototype.has = listCacheHas;
ListCache.prototype.set = listCacheSet;

/**
 * Creates a map cache object to store key-value pairs.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function MapCache(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

/**
 * Removes all key-value entries from the map.
 *
 * @private
 * @name clear
 * @memberOf MapCache
 */
function mapCacheClear() {
  this.size = 0;
  this.__data__ = {
    'hash': new Hash,
    'map': new (Map || ListCache),
    'string': new Hash
  };
}

/**
 * Removes `key` and its value from the map.
 *
 * @private
 * @name delete
 * @memberOf MapCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function mapCacheDelete(key) {
  var result = getMapData(this, key)['delete'](key);
  this.size -= result ? 1 : 0;
  return result;
}

/**
 * Gets the map value for `key`.
 *
 * @private
 * @name get
 * @memberOf MapCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function mapCacheGet(key) {
  return getMapData(this, key).get(key);
}

/**
 * Checks if a map value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf MapCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function mapCacheHas(key) {
  return getMapData(this, key).has(key);
}

/**
 * Sets the map `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf MapCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the map cache instance.
 */
function mapCacheSet(key, value) {
  var data = getMapData(this, key),
      size = data.size;

  data.set(key, value);
  this.size += data.size == size ? 0 : 1;
  return this;
}

// Add methods to `MapCache`.
MapCache.prototype.clear = mapCacheClear;
MapCache.prototype['delete'] = mapCacheDelete;
MapCache.prototype.get = mapCacheGet;
MapCache.prototype.has = mapCacheHas;
MapCache.prototype.set = mapCacheSet;

/**
 *
 * Creates an array cache object to store unique values.
 *
 * @private
 * @constructor
 * @param {Array} [values] The values to cache.
 */
function SetCache(values) {
  var index = -1,
      length = values == null ? 0 : values.length;

  this.__data__ = new MapCache;
  while (++index < length) {
    this.add(values[index]);
  }
}

/**
 * Adds `value` to the array cache.
 *
 * @private
 * @name add
 * @memberOf SetCache
 * @alias push
 * @param {*} value The value to cache.
 * @returns {Object} Returns the cache instance.
 */
function setCacheAdd(value) {
  this.__data__.set(value, HASH_UNDEFINED);
  return this;
}

/**
 * Checks if `value` is in the array cache.
 *
 * @private
 * @name has
 * @memberOf SetCache
 * @param {*} value The value to search for.
 * @returns {number} Returns `true` if `value` is found, else `false`.
 */
function setCacheHas(value) {
  return this.__data__.has(value);
}

// Add methods to `SetCache`.
SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
SetCache.prototype.has = setCacheHas;

/**
 * Creates a stack cache object to store key-value pairs.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function Stack(entries) {
  var data = this.__data__ = new ListCache(entries);
  this.size = data.size;
}

/**
 * Removes all key-value entries from the stack.
 *
 * @private
 * @name clear
 * @memberOf Stack
 */
function stackClear() {
  this.__data__ = new ListCache;
  this.size = 0;
}

/**
 * Removes `key` and its value from the stack.
 *
 * @private
 * @name delete
 * @memberOf Stack
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function stackDelete(key) {
  var data = this.__data__,
      result = data['delete'](key);

  this.size = data.size;
  return result;
}

/**
 * Gets the stack value for `key`.
 *
 * @private
 * @name get
 * @memberOf Stack
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function stackGet(key) {
  return this.__data__.get(key);
}

/**
 * Checks if a stack value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf Stack
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function stackHas(key) {
  return this.__data__.has(key);
}

/**
 * Sets the stack `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf Stack
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the stack cache instance.
 */
function stackSet(key, value) {
  var data = this.__data__;
  if (data instanceof ListCache) {
    var pairs = data.__data__;
    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
      pairs.push([key, value]);
      this.size = ++data.size;
      return this;
    }
    data = this.__data__ = new MapCache(pairs);
  }
  data.set(key, value);
  this.size = data.size;
  return this;
}

// Add methods to `Stack`.
Stack.prototype.clear = stackClear;
Stack.prototype['delete'] = stackDelete;
Stack.prototype.get = stackGet;
Stack.prototype.has = stackHas;
Stack.prototype.set = stackSet;

/**
 * Creates an array of the enumerable property names of the array-like `value`.
 *
 * @private
 * @param {*} value The value to query.
 * @param {boolean} inherited Specify returning inherited property names.
 * @returns {Array} Returns the array of property names.
 */
function arrayLikeKeys(value, inherited) {
  var isArr = isArray(value),
      isArg = !isArr && isArguments(value),
      isBuff = !isArr && !isArg && isBuffer(value),
      isType = !isArr && !isArg && !isBuff && isTypedArray(value),
      skipIndexes = isArr || isArg || isBuff || isType,
      result = skipIndexes ? baseTimes(value.length, String) : [],
      length = result.length;

  for (var key in value) {
    if ((inherited || hasOwnProperty.call(value, key)) &&
        !(skipIndexes && (
           // Safari 9 has enumerable `arguments.length` in strict mode.
           key == 'length' ||
           // Node.js 0.10 has enumerable non-index properties on buffers.
           (isBuff && (key == 'offset' || key == 'parent')) ||
           // PhantomJS 2 has enumerable non-index properties on typed arrays.
           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
           // Skip index properties.
           isIndex(key, length)
        ))) {
      result.push(key);
    }
  }
  return result;
}

/**
 * Gets the index at which the `key` is found in `array` of key-value pairs.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} key The key to search for.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function assocIndexOf(array, key) {
  var length = array.length;
  while (length--) {
    if (eq(array[length][0], key)) {
      return length;
    }
  }
  return -1;
}

/**
 * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
 * `keysFunc` and `symbolsFunc` to get the enumerable property names and
 * symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {Function} keysFunc The function to get the keys of `object`.
 * @param {Function} symbolsFunc The function to get the symbols of `object`.
 * @returns {Array} Returns the array of property names and symbols.
 */
function baseGetAllKeys(object, keysFunc, symbolsFunc) {
  var result = keysFunc(object);
  return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
}

/**
 * The base implementation of `getTag` without fallbacks for buggy environments.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */
function baseGetTag(value) {
  if (value == null) {
    return value === undefined ? undefinedTag : nullTag;
  }
  return (symToStringTag && symToStringTag in Object(value))
    ? getRawTag(value)
    : objectToString(value);
}

/**
 * The base implementation of `_.isArguments`.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 */
function baseIsArguments(value) {
  return isObjectLike(value) && baseGetTag(value) == argsTag;
}

/**
 * The base implementation of `_.isEqual` which supports partial comparisons
 * and tracks traversed objects.
 *
 * @private
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @param {boolean} bitmask The bitmask flags.
 *  1 - Unordered comparison
 *  2 - Partial comparison
 * @param {Function} [customizer] The function to customize comparisons.
 * @param {Object} [stack] Tracks traversed `value` and `other` objects.
 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
 */
function baseIsEqual(value, other, bitmask, customizer, stack) {
  if (value === other) {
    return true;
  }
  if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
    return value !== value && other !== other;
  }
  return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
}

/**
 * A specialized version of `baseIsEqual` for arrays and objects which performs
 * deep comparisons and tracks traversed objects enabling objects with circular
 * references to be compared.
 *
 * @private
 * @param {Object} object The object to compare.
 * @param {Object} other The other object to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} [stack] Tracks traversed `object` and `other` objects.
 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
 */
function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
  var objIsArr = isArray(object),
      othIsArr = isArray(other),
      objTag = objIsArr ? arrayTag : getTag(object),
      othTag = othIsArr ? arrayTag : getTag(other);

  objTag = objTag == argsTag ? objectTag : objTag;
  othTag = othTag == argsTag ? objectTag : othTag;

  var objIsObj = objTag == objectTag,
      othIsObj = othTag == objectTag,
      isSameTag = objTag == othTag;

  if (isSameTag && isBuffer(object)) {
    if (!isBuffer(other)) {
      return false;
    }
    objIsArr = true;
    objIsObj = false;
  }
  if (isSameTag && !objIsObj) {
    stack || (stack = new Stack);
    return (objIsArr || isTypedArray(object))
      ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
      : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
  }
  if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');

    if (objIsWrapped || othIsWrapped) {
      var objUnwrapped = objIsWrapped ? object.value() : object,
          othUnwrapped = othIsWrapped ? other.value() : other;

      stack || (stack = new Stack);
      return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
    }
  }
  if (!isSameTag) {
    return false;
  }
  stack || (stack = new Stack);
  return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
}

/**
 * The base implementation of `_.isNative` without bad shim checks.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a native function,
 *  else `false`.
 */
function baseIsNative(value) {
  if (!isObject(value) || isMasked(value)) {
    return false;
  }
  var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
  return pattern.test(toSource(value));
}

/**
 * The base implementation of `_.isTypedArray` without Node.js optimizations.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 */
function baseIsTypedArray(value) {
  return isObjectLike(value) &&
    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
}

/**
 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function baseKeys(object) {
  if (!isPrototype(object)) {
    return nativeKeys(object);
  }
  var result = [];
  for (var key in Object(object)) {
    if (hasOwnProperty.call(object, key) && key != 'constructor') {
      result.push(key);
    }
  }
  return result;
}

/**
 * A specialized version of `baseIsEqualDeep` for arrays with support for
 * partial deep comparisons.
 *
 * @private
 * @param {Array} array The array to compare.
 * @param {Array} other The other array to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} stack Tracks traversed `array` and `other` objects.
 * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
 */
function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
  var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
      arrLength = array.length,
      othLength = other.length;

  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
    return false;
  }
  // Assume cyclic values are equal.
  var stacked = stack.get(array);
  if (stacked && stack.get(other)) {
    return stacked == other;
  }
  var index = -1,
      result = true,
      seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;

  stack.set(array, other);
  stack.set(other, array);

  // Ignore non-index properties.
  while (++index < arrLength) {
    var arrValue = array[index],
        othValue = other[index];

    if (customizer) {
      var compared = isPartial
        ? customizer(othValue, arrValue, index, other, array, stack)
        : customizer(arrValue, othValue, index, array, other, stack);
    }
    if (compared !== undefined) {
      if (compared) {
        continue;
      }
      result = false;
      break;
    }
    // Recursively compare arrays (susceptible to call stack limits).
    if (seen) {
      if (!arraySome(other, function(othValue, othIndex) {
            if (!cacheHas(seen, othIndex) &&
                (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
              return seen.push(othIndex);
            }
          })) {
        result = false;
        break;
      }
    } else if (!(
          arrValue === othValue ||
            equalFunc(arrValue, othValue, bitmask, customizer, stack)
        )) {
      result = false;
      break;
    }
  }
  stack['delete'](array);
  stack['delete'](other);
  return result;
}

/**
 * A specialized version of `baseIsEqualDeep` for comparing objects of
 * the same `toStringTag`.
 *
 * **Note:** This function only supports comparing values with tags of
 * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
 *
 * @private
 * @param {Object} object The object to compare.
 * @param {Object} other The other object to compare.
 * @param {string} tag The `toStringTag` of the objects to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} stack Tracks traversed `object` and `other` objects.
 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
 */
function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
  switch (tag) {
    case dataViewTag:
      if ((object.byteLength != other.byteLength) ||
          (object.byteOffset != other.byteOffset)) {
        return false;
      }
      object = object.buffer;
      other = other.buffer;

    case arrayBufferTag:
      if ((object.byteLength != other.byteLength) ||
          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
        return false;
      }
      return true;

    case boolTag:
    case dateTag:
    case numberTag:
      // Coerce booleans to `1` or `0` and dates to milliseconds.
      // Invalid dates are coerced to `NaN`.
      return eq(+object, +other);

    case errorTag:
      return object.name == other.name && object.message == other.message;

    case regexpTag:
    case stringTag:
      // Coerce regexes to strings and treat strings, primitives and objects,
      // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
      // for more details.
      return object == (other + '');

    case mapTag:
      var convert = mapToArray;

    case setTag:
      var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
      convert || (convert = setToArray);

      if (object.size != other.size && !isPartial) {
        return false;
      }
      // Assume cyclic values are equal.
      var stacked = stack.get(object);
      if (stacked) {
        return stacked == other;
      }
      bitmask |= COMPARE_UNORDERED_FLAG;

      // Recursively compare objects (susceptible to call stack limits).
      stack.set(object, other);
      var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
      stack['delete'](object);
      return result;

    case symbolTag:
      if (symbolValueOf) {
        return symbolValueOf.call(object) == symbolValueOf.call(other);
      }
  }
  return false;
}

/**
 * A specialized version of `baseIsEqualDeep` for objects with support for
 * partial deep comparisons.
 *
 * @private
 * @param {Object} object The object to compare.
 * @param {Object} other The other object to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} stack Tracks traversed `object` and `other` objects.
 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
 */
function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
  var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
      objProps = getAllKeys(object),
      objLength = objProps.length,
      othProps = getAllKeys(other),
      othLength = othProps.length;

  if (objLength != othLength && !isPartial) {
    return false;
  }
  var index = objLength;
  while (index--) {
    var key = objProps[index];
    if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
      return false;
    }
  }
  // Assume cyclic values are equal.
  var stacked = stack.get(object);
  if (stacked && stack.get(other)) {
    return stacked == other;
  }
  var result = true;
  stack.set(object, other);
  stack.set(other, object);

  var skipCtor = isPartial;
  while (++index < objLength) {
    key = objProps[index];
    var objValue = object[key],
        othValue = other[key];

    if (customizer) {
      var compared = isPartial
        ? customizer(othValue, objValue, key, other, object, stack)
        : customizer(objValue, othValue, key, object, other, stack);
    }
    // Recursively compare objects (susceptible to call stack limits).
    if (!(compared === undefined
          ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
          : compared
        )) {
      result = false;
      break;
    }
    skipCtor || (skipCtor = key == 'constructor');
  }
  if (result && !skipCtor) {
    var objCtor = object.constructor,
        othCtor = other.constructor;

    // Non `Object` object instances with different constructors are not equal.
    if (objCtor != othCtor &&
        ('constructor' in object && 'constructor' in other) &&
        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
      result = false;
    }
  }
  stack['delete'](object);
  stack['delete'](other);
  return result;
}

/**
 * Creates an array of own enumerable property names and symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names and symbols.
 */
function getAllKeys(object) {
  return baseGetAllKeys(object, keys, getSymbols);
}

/**
 * Gets the data for `map`.
 *
 * @private
 * @param {Object} map The map to query.
 * @param {string} key The reference key.
 * @returns {*} Returns the map data.
 */
function getMapData(map, key) {
  var data = map.__data__;
  return isKeyable(key)
    ? data[typeof key == 'string' ? 'string' : 'hash']
    : data.map;
}

/**
 * Gets the native function at `key` of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {string} key The key of the method to get.
 * @returns {*} Returns the function if it's native, else `undefined`.
 */
function getNative(object, key) {
  var value = getValue(object, key);
  return baseIsNative(value) ? value : undefined;
}

/**
 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the raw `toStringTag`.
 */
function getRawTag(value) {
  var isOwn = hasOwnProperty.call(value, symToStringTag),
      tag = value[symToStringTag];

  try {
    value[symToStringTag] = undefined;
    var unmasked = true;
  } catch (e) {}

  var result = nativeObjectToString.call(value);
  if (unmasked) {
    if (isOwn) {
      value[symToStringTag] = tag;
    } else {
      delete value[symToStringTag];
    }
  }
  return result;
}

/**
 * Creates an array of the own enumerable symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of symbols.
 */
var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
  if (object == null) {
    return [];
  }
  object = Object(object);
  return arrayFilter(nativeGetSymbols(object), function(symbol) {
    return propertyIsEnumerable.call(object, symbol);
  });
};

/**
 * Gets the `toStringTag` of `value`.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */
var getTag = baseGetTag;

// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
    (Map && getTag(new Map) != mapTag) ||
    (Promise && getTag(Promise.resolve()) != promiseTag) ||
    (Set && getTag(new Set) != setTag) ||
    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
  getTag = function(value) {
    var result = baseGetTag(value),
        Ctor = result == objectTag ? value.constructor : undefined,
        ctorString = Ctor ? toSource(Ctor) : '';

    if (ctorString) {
      switch (ctorString) {
        case dataViewCtorString: return dataViewTag;
        case mapCtorString: return mapTag;
        case promiseCtorString: return promiseTag;
        case setCtorString: return setTag;
        case weakMapCtorString: return weakMapTag;
      }
    }
    return result;
  };
}

/**
 * Checks if `value` is a valid array-like index.
 *
 * @private
 * @param {*} value The value to check.
 * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
 * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
 */
function isIndex(value, length) {
  length = length == null ? MAX_SAFE_INTEGER : length;
  return !!length &&
    (typeof value == 'number' || reIsUint.test(value)) &&
    (value > -1 && value % 1 == 0 && value < length);
}

/**
 * Checks if `value` is suitable for use as unique object key.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
 */
function isKeyable(value) {
  var type = typeof value;
  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
    ? (value !== '__proto__')
    : (value === null);
}

/**
 * Checks if `func` has its source masked.
 *
 * @private
 * @param {Function} func The function to check.
 * @returns {boolean} Returns `true` if `func` is masked, else `false`.
 */
function isMasked(func) {
  return !!maskSrcKey && (maskSrcKey in func);
}

/**
 * Checks if `value` is likely a prototype object.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
 */
function isPrototype(value) {
  var Ctor = value && value.constructor,
      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;

  return value === proto;
}

/**
 * Converts `value` to a string using `Object.prototype.toString`.
 *
 * @private
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 */
function objectToString(value) {
  return nativeObjectToString.call(value);
}

/**
 * Converts `func` to its source code.
 *
 * @private
 * @param {Function} func The function to convert.
 * @returns {string} Returns the source code.
 */
function toSource(func) {
  if (func != null) {
    try {
      return funcToString.call(func);
    } catch (e) {}
    try {
      return (func + '');
    } catch (e) {}
  }
  return '';
}

/**
 * Performs a
 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
 * comparison between two values to determine if they are equivalent.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
 * @example
 *
 * var object = { 'a': 1 };
 * var other = { 'a': 1 };
 *
 * _.eq(object, object);
 * // => true
 *
 * _.eq(object, other);
 * // => false
 *
 * _.eq('a', 'a');
 * // => true
 *
 * _.eq('a', Object('a'));
 * // => false
 *
 * _.eq(NaN, NaN);
 * // => true
 */
function eq(value, other) {
  return value === other || (value !== value && other !== other);
}

/**
 * Checks if `value` is likely an `arguments` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 *  else `false`.
 * @example
 *
 * _.isArguments(function() { return arguments; }());
 * // => true
 *
 * _.isArguments([1, 2, 3]);
 * // => false
 */
var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
  return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
    !propertyIsEnumerable.call(value, 'callee');
};

/**
 * Checks if `value` is classified as an `Array` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
 * @example
 *
 * _.isArray([1, 2, 3]);
 * // => true
 *
 * _.isArray(document.body.children);
 * // => false
 *
 * _.isArray('abc');
 * // => false
 *
 * _.isArray(_.noop);
 * // => false
 */
var isArray = Array.isArray;

/**
 * Checks if `value` is array-like. A value is considered array-like if it's
 * not a function and has a `value.length` that's an integer greater than or
 * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
 * @example
 *
 * _.isArrayLike([1, 2, 3]);
 * // => true
 *
 * _.isArrayLike(document.body.children);
 * // => true
 *
 * _.isArrayLike('abc');
 * // => true
 *
 * _.isArrayLike(_.noop);
 * // => false
 */
function isArrayLike(value) {
  return value != null && isLength(value.length) && !isFunction(value);
}

/**
 * Checks if `value` is a buffer.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
 * @example
 *
 * _.isBuffer(new Buffer(2));
 * // => true
 *
 * _.isBuffer(new Uint8Array(2));
 * // => false
 */
var isBuffer = nativeIsBuffer || stubFalse;

/**
 * Performs a deep comparison between two values to determine if they are
 * equivalent.
 *
 * **Note:** This method supports comparing arrays, array buffers, booleans,
 * date objects, error objects, maps, numbers, `Object` objects, regexes,
 * sets, strings, symbols, and typed arrays. `Object` objects are compared
 * by their own, not inherited, enumerable properties. Functions and DOM
 * nodes are compared by strict equality, i.e. `===`.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
 * @example
 *
 * var object = { 'a': 1 };
 * var other = { 'a': 1 };
 *
 * _.isEqual(object, other);
 * // => true
 *
 * object === other;
 * // => false
 */
function isEqual(value, other) {
  return baseIsEqual(value, other);
}

/**
 * Checks if `value` is classified as a `Function` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
 * @example
 *
 * _.isFunction(_);
 * // => true
 *
 * _.isFunction(/abc/);
 * // => false
 */
function isFunction(value) {
  if (!isObject(value)) {
    return false;
  }
  // The use of `Object#toString` avoids issues with the `typeof` operator
  // in Safari 9 which returns 'object' for typed arrays and other constructors.
  var tag = baseGetTag(value);
  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
}

/**
 * Checks if `value` is a valid array-like length.
 *
 * **Note:** This method is loosely based on
 * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
 * @example
 *
 * _.isLength(3);
 * // => true
 *
 * _.isLength(Number.MIN_VALUE);
 * // => false
 *
 * _.isLength(Infinity);
 * // => false
 *
 * _.isLength('3');
 * // => false
 */
function isLength(value) {
  return typeof value == 'number' &&
    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
}

/**
 * Checks if `value` is the
 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
 * @example
 *
 * _.isObject({});
 * // => true
 *
 * _.isObject([1, 2, 3]);
 * // => true
 *
 * _.isObject(_.noop);
 * // => true
 *
 * _.isObject(null);
 * // => false
 */
function isObject(value) {
  var type = typeof value;
  return value != null && (type == 'object' || type == 'function');
}

/**
 * Checks if `value` is object-like. A value is object-like if it's not `null`
 * and has a `typeof` result of "object".
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
 * @example
 *
 * _.isObjectLike({});
 * // => true
 *
 * _.isObjectLike([1, 2, 3]);
 * // => true
 *
 * _.isObjectLike(_.noop);
 * // => false
 *
 * _.isObjectLike(null);
 * // => false
 */
function isObjectLike(value) {
  return value != null && typeof value == 'object';
}

/**
 * Checks if `value` is classified as a typed array.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 * @example
 *
 * _.isTypedArray(new Uint8Array);
 * // => true
 *
 * _.isTypedArray([]);
 * // => false
 */
var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;

/**
 * Creates an array of the own enumerable property names of `object`.
 *
 * **Note:** Non-object values are coerced to objects. See the
 * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
 * for more details.
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Object
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 *   this.b = 2;
 * }
 *
 * Foo.prototype.c = 3;
 *
 * _.keys(new Foo);
 * // => ['a', 'b'] (iteration order is not guaranteed)
 *
 * _.keys('hi');
 * // => ['0', '1']
 */
function keys(object) {
  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
}

/**
 * This method returns a new empty array.
 *
 * @static
 * @memberOf _
 * @since 4.13.0
 * @category Util
 * @returns {Array} Returns the new empty array.
 * @example
 *
 * var arrays = _.times(2, _.stubArray);
 *
 * console.log(arrays);
 * // => [[], []]
 *
 * console.log(arrays[0] === arrays[1]);
 * // => false
 */
function stubArray() {
  return [];
}

/**
 * This method returns `false`.
 *
 * @static
 * @memberOf _
 * @since 4.13.0
 * @category Util
 * @returns {boolean} Returns `false`.
 * @example
 *
 * _.times(2, _.stubFalse);
 * // => [false, false]
 */
function stubFalse() {
  return false;
}

module.exports = isEqual;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],82:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/**
 * Checks if `value` is a function.
 *
 * @static
 * @memberOf _
 * @category Objects
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if the `value` is a function, else `false`.
 * @example
 *
 * _.isFunction(_);
 * // => true
 */
function isFunction(value) {
  return typeof value == 'function';
}

module.exports = isFunction;

},{}],83:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var objectTypes = require('lodash._objecttypes');

/**
 * Checks if `value` is the language type of Object.
 * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
 *
 * @static
 * @memberOf _
 * @category Objects
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if the `value` is an object, else `false`.
 * @example
 *
 * _.isObject({});
 * // => true
 *
 * _.isObject([1, 2, 3]);
 * // => true
 *
 * _.isObject(1);
 * // => false
 */
function isObject(value) {
  // check if the value is the ECMAScript language type of Object
  // http://es5.github.io/#x8
  // and avoid a V8 bug
  // http://code.google.com/p/v8/issues/detail?id=2291
  return !!(value && objectTypes[typeof value]);
}

module.exports = isObject;

},{"lodash._objecttypes":68}],84:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var isNative = require('lodash._isnative'),
    isObject = require('lodash.isobject'),
    shimKeys = require('lodash._shimkeys');

/* Native method shortcuts for methods with the same name as other `lodash` methods */
var nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys;

/**
 * Creates an array composed of the own enumerable property names of an object.
 *
 * @static
 * @memberOf _
 * @category Objects
 * @param {Object} object The object to inspect.
 * @returns {Array} Returns an array of property names.
 * @example
 *
 * _.keys({ 'one': 1, 'two': 2, 'three': 3 });
 * // => ['one', 'two', 'three'] (property order is not guaranteed across environments)
 */
var keys = !nativeKeys ? shimKeys : function(object) {
  if (!isObject(object)) {
    return [];
  }
  return nativeKeys(object);
};

module.exports = keys;

},{"lodash._isnative":66,"lodash._shimkeys":71,"lodash.isobject":83}],85:[function(require,module,exports){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */

/**
 * A no-operation function.
 *
 * @static
 * @memberOf _
 * @category Utilities
 * @example
 *
 * var object = { 'name': 'fred' };
 * _.noop(object) === undefined;
 * // => true
 */
function noop() {
  // no operation performed
}

module.exports = noop;

},{}],86:[function(require,module,exports){
(function (global){
/**
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modularize modern exports="npm" -o ./npm/`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
var isNative = require('lodash._isnative');

/** Used to detect functions containing a `this` reference */
var reThis = /\bthis\b/;

/**
 * An object used to flag environments features.
 *
 * @static
 * @memberOf _
 * @type Object
 */
var support = {};

/**
 * Detect if functions can be decompiled by `Function#toString`
 * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps).
 *
 * @memberOf _.support
 * @type boolean
 */
support.funcDecomp = !isNative(global.WinRTError) && reThis.test(function() { return this; });

/**
 * Detect if `Function#name` is supported (all but IE).
 *
 * @memberOf _.support
 * @type boolean
 */
support.funcNames = typeof Function.name == 'string';

module.exports = support;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{"lodash._isnative":66}],87:[function(require,module,exports){
(function (global){
/**
 * @license
 * Lodash <https://lodash.com/>
 * Copyright JS Foundation and other contributors <https://js.foundation/>
 * Released under MIT license <https://lodash.com/license>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 */
;(function() {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /** Used as the semantic version number. */
  var VERSION = '4.17.4';

  /** Used as the size to enable large array optimizations. */
  var LARGE_ARRAY_SIZE = 200;

  /** Error message constants. */
  var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
      FUNC_ERROR_TEXT = 'Expected a function';

  /** Used to stand-in for `undefined` hash values. */
  var HASH_UNDEFINED = '__lodash_hash_undefined__';

  /** Used as the maximum memoize cache size. */
  var MAX_MEMOIZE_SIZE = 500;

  /** Used as the internal argument placeholder. */
  var PLACEHOLDER = '__lodash_placeholder__';

  /** Used to compose bitmasks for cloning. */
  var CLONE_DEEP_FLAG = 1,
      CLONE_FLAT_FLAG = 2,
      CLONE_SYMBOLS_FLAG = 4;

  /** Used to compose bitmasks for value comparisons. */
  var COMPARE_PARTIAL_FLAG = 1,
      COMPARE_UNORDERED_FLAG = 2;

  /** Used to compose bitmasks for function metadata. */
  var WRAP_BIND_FLAG = 1,
      WRAP_BIND_KEY_FLAG = 2,
      WRAP_CURRY_BOUND_FLAG = 4,
      WRAP_CURRY_FLAG = 8,
      WRAP_CURRY_RIGHT_FLAG = 16,
      WRAP_PARTIAL_FLAG = 32,
      WRAP_PARTIAL_RIGHT_FLAG = 64,
      WRAP_ARY_FLAG = 128,
      WRAP_REARG_FLAG = 256,
      WRAP_FLIP_FLAG = 512;

  /** Used as default options for `_.truncate`. */
  var DEFAULT_TRUNC_LENGTH = 30,
      DEFAULT_TRUNC_OMISSION = '...';

  /** Used to detect hot functions by number of calls within a span of milliseconds. */
  var HOT_COUNT = 800,
      HOT_SPAN = 16;

  /** Used to indicate the type of lazy iteratees. */
  var LAZY_FILTER_FLAG = 1,
      LAZY_MAP_FLAG = 2,
      LAZY_WHILE_FLAG = 3;

  /** Used as references for various `Number` constants. */
  var INFINITY = 1 / 0,
      MAX_SAFE_INTEGER = 9007199254740991,
      MAX_INTEGER = 1.7976931348623157e+308,
      NAN = 0 / 0;

  /** Used as references for the maximum length and index of an array. */
  var MAX_ARRAY_LENGTH = 4294967295,
      MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
      HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;

  /** Used to associate wrap methods with their bit flags. */
  var wrapFlags = [
    ['ary', WRAP_ARY_FLAG],
    ['bind', WRAP_BIND_FLAG],
    ['bindKey', WRAP_BIND_KEY_FLAG],
    ['curry', WRAP_CURRY_FLAG],
    ['curryRight', WRAP_CURRY_RIGHT_FLAG],
    ['flip', WRAP_FLIP_FLAG],
    ['partial', WRAP_PARTIAL_FLAG],
    ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
    ['rearg', WRAP_REARG_FLAG]
  ];

  /** `Object#toString` result references. */
  var argsTag = '[object Arguments]',
      arrayTag = '[object Array]',
      asyncTag = '[object AsyncFunction]',
      boolTag = '[object Boolean]',
      dateTag = '[object Date]',
      domExcTag = '[object DOMException]',
      errorTag = '[object Error]',
      funcTag = '[object Function]',
      genTag = '[object GeneratorFunction]',
      mapTag = '[object Map]',
      numberTag = '[object Number]',
      nullTag = '[object Null]',
      objectTag = '[object Object]',
      promiseTag = '[object Promise]',
      proxyTag = '[object Proxy]',
      regexpTag = '[object RegExp]',
      setTag = '[object Set]',
      stringTag = '[object String]',
      symbolTag = '[object Symbol]',
      undefinedTag = '[object Undefined]',
      weakMapTag = '[object WeakMap]',
      weakSetTag = '[object WeakSet]';

  var arrayBufferTag = '[object ArrayBuffer]',
      dataViewTag = '[object DataView]',
      float32Tag = '[object Float32Array]',
      float64Tag = '[object Float64Array]',
      int8Tag = '[object Int8Array]',
      int16Tag = '[object Int16Array]',
      int32Tag = '[object Int32Array]',
      uint8Tag = '[object Uint8Array]',
      uint8ClampedTag = '[object Uint8ClampedArray]',
      uint16Tag = '[object Uint16Array]',
      uint32Tag = '[object Uint32Array]';

  /** Used to match empty string literals in compiled template source. */
  var reEmptyStringLeading = /\b__p \+= '';/g,
      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;

  /** Used to match HTML entities and HTML characters. */
  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
      reUnescapedHtml = /[&<>"']/g,
      reHasEscapedHtml = RegExp(reEscapedHtml.source),
      reHasUnescapedHtml = RegExp(reUnescapedHtml.source);

  /** Used to match template delimiters. */
  var reEscape = /<%-([\s\S]+?)%>/g,
      reEvaluate = /<%([\s\S]+?)%>/g,
      reInterpolate = /<%=([\s\S]+?)%>/g;

  /** Used to match property names within property paths. */
  var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
      reIsPlainProp = /^\w*$/,
      reLeadingDot = /^\./,
      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;

  /**
   * Used to match `RegExp`
   * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
   */
  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
      reHasRegExpChar = RegExp(reRegExpChar.source);

  /** Used to match leading and trailing whitespace. */
  var reTrim = /^\s+|\s+$/g,
      reTrimStart = /^\s+/,
      reTrimEnd = /\s+$/;

  /** Used to match wrap detail comments. */
  var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
      reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
      reSplitDetails = /,? & /;

  /** Used to match words composed of alphanumeric characters. */
  var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;

  /** Used to match backslashes in property paths. */
  var reEscapeChar = /\\(\\)?/g;

  /**
   * Used to match
   * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
   */
  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;

  /** Used to match `RegExp` flags from their coerced string values. */
  var reFlags = /\w*$/;

  /** Used to detect bad signed hexadecimal string values. */
  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;

  /** Used to detect binary string values. */
  var reIsBinary = /^0b[01]+$/i;

  /** Used to detect host constructors (Safari). */
  var reIsHostCtor = /^\[object .+?Constructor\]$/;

  /** Used to detect octal string values. */
  var reIsOctal = /^0o[0-7]+$/i;

  /** Used to detect unsigned integer values. */
  var reIsUint = /^(?:0|[1-9]\d*)$/;

  /** Used to match Latin Unicode letters (excluding mathematical operators). */
  var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;

  /** Used to ensure capturing order of template delimiters. */
  var reNoMatch = /($^)/;

  /** Used to match unescaped characters in compiled string literals. */
  var reUnescapedString = /['\n\r\u2028\u2029\\]/g;

  /** Used to compose unicode character classes. */
  var rsAstralRange = '\\ud800-\\udfff',
      rsComboMarksRange = '\\u0300-\\u036f',
      reComboHalfMarksRange = '\\ufe20-\\ufe2f',
      rsComboSymbolsRange = '\\u20d0-\\u20ff',
      rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
      rsDingbatRange = '\\u2700-\\u27bf',
      rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
      rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
      rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
      rsPunctuationRange = '\\u2000-\\u206f',
      rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
      rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
      rsVarRange = '\\ufe0e\\ufe0f',
      rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;

  /** Used to compose unicode capture groups. */
  var rsApos = "['\u2019]",
      rsAstral = '[' + rsAstralRange + ']',
      rsBreak = '[' + rsBreakRange + ']',
      rsCombo = '[' + rsComboRange + ']',
      rsDigits = '\\d+',
      rsDingbat = '[' + rsDingbatRange + ']',
      rsLower = '[' + rsLowerRange + ']',
      rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
      rsFitz = '\\ud83c[\\udffb-\\udfff]',
      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
      rsNonAstral = '[^' + rsAstralRange + ']',
      rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
      rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
      rsUpper = '[' + rsUpperRange + ']',
      rsZWJ = '\\u200d';

  /** Used to compose unicode regexes. */
  var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
      rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
      rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
      rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
      reOptMod = rsModifier + '?',
      rsOptVar = '[' + rsVarRange + ']?',
      rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
      rsOrdLower = '\\d*(?:(?:1st|2nd|3rd|(?![123])\\dth)\\b)',
      rsOrdUpper = '\\d*(?:(?:1ST|2ND|3RD|(?![123])\\dTH)\\b)',
      rsSeq = rsOptVar + reOptMod + rsOptJoin,
      rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
      rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';

  /** Used to match apostrophes. */
  var reApos = RegExp(rsApos, 'g');

  /**
   * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
   * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
   */
  var reComboMark = RegExp(rsCombo, 'g');

  /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
  var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');

  /** Used to match complex or compound words. */
  var reUnicodeWord = RegExp([
    rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
    rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
    rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
    rsUpper + '+' + rsOptContrUpper,
    rsOrdUpper,
    rsOrdLower,
    rsDigits,
    rsEmoji
  ].join('|'), 'g');

  /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
  var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboRange + rsVarRange + ']');

  /** Used to detect strings that need a more robust regexp to match words. */
  var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;

  /** Used to assign default `context` object properties. */
  var contextProps = [
    'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
    'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
    'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
    '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
  ];

  /** Used to make template sourceURLs easier to identify. */
  var templateCounter = -1;

  /** Used to identify `toStringTag` values of typed arrays. */
  var typedArrayTags = {};
  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
  typedArrayTags[uint32Tag] = true;
  typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
  typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
  typedArrayTags[errorTag] = typedArrayTags[funcTag] =
  typedArrayTags[mapTag] = typedArrayTags[numberTag] =
  typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
  typedArrayTags[setTag] = typedArrayTags[stringTag] =
  typedArrayTags[weakMapTag] = false;

  /** Used to identify `toStringTag` values supported by `_.clone`. */
  var cloneableTags = {};
  cloneableTags[argsTag] = cloneableTags[arrayTag] =
  cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
  cloneableTags[boolTag] = cloneableTags[dateTag] =
  cloneableTags[float32Tag] = cloneableTags[float64Tag] =
  cloneableTags[int8Tag] = cloneableTags[int16Tag] =
  cloneableTags[int32Tag] = cloneableTags[mapTag] =
  cloneableTags[numberTag] = cloneableTags[objectTag] =
  cloneableTags[regexpTag] = cloneableTags[setTag] =
  cloneableTags[stringTag] = cloneableTags[symbolTag] =
  cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
  cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
  cloneableTags[errorTag] = cloneableTags[funcTag] =
  cloneableTags[weakMapTag] = false;

  /** Used to map Latin Unicode letters to basic Latin letters. */
  var deburredLetters = {
    // Latin-1 Supplement block.
    '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
    '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
    '\xc7': 'C',  '\xe7': 'c',
    '\xd0': 'D',  '\xf0': 'd',
    '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
    '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
    '\xcc': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
    '\xec': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
    '\xd1': 'N',  '\xf1': 'n',
    '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
    '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
    '\xd9': 'U',  '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
    '\xf9': 'u',  '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
    '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
    '\xc6': 'Ae', '\xe6': 'ae',
    '\xde': 'Th', '\xfe': 'th',
    '\xdf': 'ss',
    // Latin Extended-A block.
    '\u0100': 'A',  '\u0102': 'A', '\u0104': 'A',
    '\u0101': 'a',  '\u0103': 'a', '\u0105': 'a',
    '\u0106': 'C',  '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
    '\u0107': 'c',  '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
    '\u010e': 'D',  '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
    '\u0112': 'E',  '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
    '\u0113': 'e',  '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
    '\u011c': 'G',  '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
    '\u011d': 'g',  '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
    '\u0124': 'H',  '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
    '\u0128': 'I',  '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
    '\u0129': 'i',  '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
    '\u0134': 'J',  '\u0135': 'j',
    '\u0136': 'K',  '\u0137': 'k', '\u0138': 'k',
    '\u0139': 'L',  '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
    '\u013a': 'l',  '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
    '\u0143': 'N',  '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
    '\u0144': 'n',  '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
    '\u014c': 'O',  '\u014e': 'O', '\u0150': 'O',
    '\u014d': 'o',  '\u014f': 'o', '\u0151': 'o',
    '\u0154': 'R',  '\u0156': 'R', '\u0158': 'R',
    '\u0155': 'r',  '\u0157': 'r', '\u0159': 'r',
    '\u015a': 'S',  '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
    '\u015b': 's',  '\u015d': 's', '\u015f': 's', '\u0161': 's',
    '\u0162': 'T',  '\u0164': 'T', '\u0166': 'T',
    '\u0163': 't',  '\u0165': 't', '\u0167': 't',
    '\u0168': 'U',  '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
    '\u0169': 'u',  '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
    '\u0174': 'W',  '\u0175': 'w',
    '\u0176': 'Y',  '\u0177': 'y', '\u0178': 'Y',
    '\u0179': 'Z',  '\u017b': 'Z', '\u017d': 'Z',
    '\u017a': 'z',  '\u017c': 'z', '\u017e': 'z',
    '\u0132': 'IJ', '\u0133': 'ij',
    '\u0152': 'Oe', '\u0153': 'oe',
    '\u0149': "'n", '\u017f': 's'
  };

  /** Used to map characters to HTML entities. */
  var htmlEscapes = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#39;'
  };

  /** Used to map HTML entities to characters. */
  var htmlUnescapes = {
    '&amp;': '&',
    '&lt;': '<',
    '&gt;': '>',
    '&quot;': '"',
    '&#39;': "'"
  };

  /** Used to escape characters for inclusion in compiled string literals. */
  var stringEscapes = {
    '\\': '\\',
    "'": "'",
    '\n': 'n',
    '\r': 'r',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  /** Built-in method references without a dependency on `root`. */
  var freeParseFloat = parseFloat,
      freeParseInt = parseInt;

  /** Detect free variable `global` from Node.js. */
  var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

  /** Detect free variable `self`. */
  var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

  /** Used as a reference to the global object. */
  var root = freeGlobal || freeSelf || Function('return this')();

  /** Detect free variable `exports`. */
  var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Detect free variable `process` from Node.js. */
  var freeProcess = moduleExports && freeGlobal.process;

  /** Used to access faster Node.js helpers. */
  var nodeUtil = (function() {
    try {
      return freeProcess && freeProcess.binding && freeProcess.binding('util');
    } catch (e) {}
  }());

  /* Node.js helper references. */
  var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
      nodeIsDate = nodeUtil && nodeUtil.isDate,
      nodeIsMap = nodeUtil && nodeUtil.isMap,
      nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
      nodeIsSet = nodeUtil && nodeUtil.isSet,
      nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;

  /*--------------------------------------------------------------------------*/

  /**
   * Adds the key-value `pair` to `map`.
   *
   * @private
   * @param {Object} map The map to modify.
   * @param {Array} pair The key-value pair to add.
   * @returns {Object} Returns `map`.
   */
  function addMapEntry(map, pair) {
    // Don't return `map.set` because it's not chainable in IE 11.
    map.set(pair[0], pair[1]);
    return map;
  }

  /**
   * Adds `value` to `set`.
   *
   * @private
   * @param {Object} set The set to modify.
   * @param {*} value The value to add.
   * @returns {Object} Returns `set`.
   */
  function addSetEntry(set, value) {
    // Don't return `set.add` because it's not chainable in IE 11.
    set.add(value);
    return set;
  }

  /**
   * A faster alternative to `Function#apply`, this function invokes `func`
   * with the `this` binding of `thisArg` and the arguments of `args`.
   *
   * @private
   * @param {Function} func The function to invoke.
   * @param {*} thisArg The `this` binding of `func`.
   * @param {Array} args The arguments to invoke `func` with.
   * @returns {*} Returns the result of `func`.
   */
  function apply(func, thisArg, args) {
    switch (args.length) {
      case 0: return func.call(thisArg);
      case 1: return func.call(thisArg, args[0]);
      case 2: return func.call(thisArg, args[0], args[1]);
      case 3: return func.call(thisArg, args[0], args[1], args[2]);
    }
    return func.apply(thisArg, args);
  }

  /**
   * A specialized version of `baseAggregator` for arrays.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} setter The function to set `accumulator` values.
   * @param {Function} iteratee The iteratee to transform keys.
   * @param {Object} accumulator The initial aggregated object.
   * @returns {Function} Returns `accumulator`.
   */
  function arrayAggregator(array, setter, iteratee, accumulator) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      var value = array[index];
      setter(accumulator, value, iteratee(value), array);
    }
    return accumulator;
  }

  /**
   * A specialized version of `_.forEach` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns `array`.
   */
  function arrayEach(array, iteratee) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (iteratee(array[index], index, array) === false) {
        break;
      }
    }
    return array;
  }

  /**
   * A specialized version of `_.forEachRight` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns `array`.
   */
  function arrayEachRight(array, iteratee) {
    var length = array == null ? 0 : array.length;

    while (length--) {
      if (iteratee(array[length], length, array) === false) {
        break;
      }
    }
    return array;
  }

  /**
   * A specialized version of `_.every` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {boolean} Returns `true` if all elements pass the predicate check,
   *  else `false`.
   */
  function arrayEvery(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (!predicate(array[index], index, array)) {
        return false;
      }
    }
    return true;
  }

  /**
   * A specialized version of `_.filter` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {Array} Returns the new filtered array.
   */
  function arrayFilter(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length,
        resIndex = 0,
        result = [];

    while (++index < length) {
      var value = array[index];
      if (predicate(value, index, array)) {
        result[resIndex++] = value;
      }
    }
    return result;
  }

  /**
   * A specialized version of `_.includes` for arrays without support for
   * specifying an index to search from.
   *
   * @private
   * @param {Array} [array] The array to inspect.
   * @param {*} target The value to search for.
   * @returns {boolean} Returns `true` if `target` is found, else `false`.
   */
  function arrayIncludes(array, value) {
    var length = array == null ? 0 : array.length;
    return !!length && baseIndexOf(array, value, 0) > -1;
  }

  /**
   * This function is like `arrayIncludes` except that it accepts a comparator.
   *
   * @private
   * @param {Array} [array] The array to inspect.
   * @param {*} target The value to search for.
   * @param {Function} comparator The comparator invoked per element.
   * @returns {boolean} Returns `true` if `target` is found, else `false`.
   */
  function arrayIncludesWith(array, value, comparator) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (comparator(value, array[index])) {
        return true;
      }
    }
    return false;
  }

  /**
   * A specialized version of `_.map` for arrays without support for iteratee
   * shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns the new mapped array.
   */
  function arrayMap(array, iteratee) {
    var index = -1,
        length = array == null ? 0 : array.length,
        result = Array(length);

    while (++index < length) {
      result[index] = iteratee(array[index], index, array);
    }
    return result;
  }

  /**
   * Appends the elements of `values` to `array`.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {Array} values The values to append.
   * @returns {Array} Returns `array`.
   */
  function arrayPush(array, values) {
    var index = -1,
        length = values.length,
        offset = array.length;

    while (++index < length) {
      array[offset + index] = values[index];
    }
    return array;
  }

  /**
   * A specialized version of `_.reduce` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @param {*} [accumulator] The initial value.
   * @param {boolean} [initAccum] Specify using the first element of `array` as
   *  the initial value.
   * @returns {*} Returns the accumulated value.
   */
  function arrayReduce(array, iteratee, accumulator, initAccum) {
    var index = -1,
        length = array == null ? 0 : array.length;

    if (initAccum && length) {
      accumulator = array[++index];
    }
    while (++index < length) {
      accumulator = iteratee(accumulator, array[index], index, array);
    }
    return accumulator;
  }

  /**
   * A specialized version of `_.reduceRight` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @param {*} [accumulator] The initial value.
   * @param {boolean} [initAccum] Specify using the last element of `array` as
   *  the initial value.
   * @returns {*} Returns the accumulated value.
   */
  function arrayReduceRight(array, iteratee, accumulator, initAccum) {
    var length = array == null ? 0 : array.length;
    if (initAccum && length) {
      accumulator = array[--length];
    }
    while (length--) {
      accumulator = iteratee(accumulator, array[length], length, array);
    }
    return accumulator;
  }

  /**
   * A specialized version of `_.some` for arrays without support for iteratee
   * shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {boolean} Returns `true` if any element passes the predicate check,
   *  else `false`.
   */
  function arraySome(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (predicate(array[index], index, array)) {
        return true;
      }
    }
    return false;
  }

  /**
   * Gets the size of an ASCII `string`.
   *
   * @private
   * @param {string} string The string inspect.
   * @returns {number} Returns the string size.
   */
  var asciiSize = baseProperty('length');

  /**
   * Converts an ASCII `string` to an array.
   *
   * @private
   * @param {string} string The string to convert.
   * @returns {Array} Returns the converted array.
   */
  function asciiToArray(string) {
    return string.split('');
  }

  /**
   * Splits an ASCII `string` into an array of its words.
   *
   * @private
   * @param {string} The string to inspect.
   * @returns {Array} Returns the words of `string`.
   */
  function asciiWords(string) {
    return string.match(reAsciiWord) || [];
  }

  /**
   * The base implementation of methods like `_.findKey` and `_.findLastKey`,
   * without support for iteratee shorthands, which iterates over `collection`
   * using `eachFunc`.
   *
   * @private
   * @param {Array|Object} collection The collection to inspect.
   * @param {Function} predicate The function invoked per iteration.
   * @param {Function} eachFunc The function to iterate over `collection`.
   * @returns {*} Returns the found element or its key, else `undefined`.
   */
  function baseFindKey(collection, predicate, eachFunc) {
    var result;
    eachFunc(collection, function(value, key, collection) {
      if (predicate(value, key, collection)) {
        result = key;
        return false;
      }
    });
    return result;
  }

  /**
   * The base implementation of `_.findIndex` and `_.findLastIndex` without
   * support for iteratee shorthands.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {Function} predicate The function invoked per iteration.
   * @param {number} fromIndex The index to search from.
   * @param {boolean} [fromRight] Specify iterating from right to left.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseFindIndex(array, predicate, fromIndex, fromRight) {
    var length = array.length,
        index = fromIndex + (fromRight ? 1 : -1);

    while ((fromRight ? index-- : ++index < length)) {
      if (predicate(array[index], index, array)) {
        return index;
      }
    }
    return -1;
  }

  /**
   * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseIndexOf(array, value, fromIndex) {
    return value === value
      ? strictIndexOf(array, value, fromIndex)
      : baseFindIndex(array, baseIsNaN, fromIndex);
  }

  /**
   * This function is like `baseIndexOf` except that it accepts a comparator.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @param {Function} comparator The comparator invoked per element.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function baseIndexOfWith(array, value, fromIndex, comparator) {
    var index = fromIndex - 1,
        length = array.length;

    while (++index < length) {
      if (comparator(array[index], value)) {
        return index;
      }
    }
    return -1;
  }

  /**
   * The base implementation of `_.isNaN` without support for number objects.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
   */
  function baseIsNaN(value) {
    return value !== value;
  }

  /**
   * The base implementation of `_.mean` and `_.meanBy` without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} array The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {number} Returns the mean.
   */
  function baseMean(array, iteratee) {
    var length = array == null ? 0 : array.length;
    return length ? (baseSum(array, iteratee) / length) : NAN;
  }

  /**
   * The base implementation of `_.property` without support for deep paths.
   *
   * @private
   * @param {string} key The key of the property to get.
   * @returns {Function} Returns the new accessor function.
   */
  function baseProperty(key) {
    return function(object) {
      return object == null ? undefined : object[key];
    };
  }

  /**
   * The base implementation of `_.propertyOf` without support for deep paths.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Function} Returns the new accessor function.
   */
  function basePropertyOf(object) {
    return function(key) {
      return object == null ? undefined : object[key];
    };
  }

  /**
   * The base implementation of `_.reduce` and `_.reduceRight`, without support
   * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
   *
   * @private
   * @param {Array|Object} collection The collection to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @param {*} accumulator The initial value.
   * @param {boolean} initAccum Specify using the first or last element of
   *  `collection` as the initial value.
   * @param {Function} eachFunc The function to iterate over `collection`.
   * @returns {*} Returns the accumulated value.
   */
  function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
    eachFunc(collection, function(value, index, collection) {
      accumulator = initAccum
        ? (initAccum = false, value)
        : iteratee(accumulator, value, index, collection);
    });
    return accumulator;
  }

  /**
   * The base implementation of `_.sortBy` which uses `comparer` to define the
   * sort order of `array` and replaces criteria objects with their corresponding
   * values.
   *
   * @private
   * @param {Array} array The array to sort.
   * @param {Function} comparer The function to define sort order.
   * @returns {Array} Returns `array`.
   */
  function baseSortBy(array, comparer) {
    var length = array.length;

    array.sort(comparer);
    while (length--) {
      array[length] = array[length].value;
    }
    return array;
  }

  /**
   * The base implementation of `_.sum` and `_.sumBy` without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} array The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {number} Returns the sum.
   */
  function baseSum(array, iteratee) {
    var result,
        index = -1,
        length = array.length;

    while (++index < length) {
      var current = iteratee(array[index]);
      if (current !== undefined) {
        result = result === undefined ? current : (result + current);
      }
    }
    return result;
  }

  /**
   * The base implementation of `_.times` without support for iteratee shorthands
   * or max array length checks.
   *
   * @private
   * @param {number} n The number of times to invoke `iteratee`.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns the array of results.
   */
  function baseTimes(n, iteratee) {
    var index = -1,
        result = Array(n);

    while (++index < n) {
      result[index] = iteratee(index);
    }
    return result;
  }

  /**
   * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
   * of key-value pairs for `object` corresponding to the property names of `props`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {Array} props The property names to get values for.
   * @returns {Object} Returns the key-value pairs.
   */
  function baseToPairs(object, props) {
    return arrayMap(props, function(key) {
      return [key, object[key]];
    });
  }

  /**
   * The base implementation of `_.unary` without support for storing metadata.
   *
   * @private
   * @param {Function} func The function to cap arguments for.
   * @returns {Function} Returns the new capped function.
   */
  function baseUnary(func) {
    return function(value) {
      return func(value);
    };
  }

  /**
   * The base implementation of `_.values` and `_.valuesIn` which creates an
   * array of `object` property values corresponding to the property names
   * of `props`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {Array} props The property names to get values for.
   * @returns {Object} Returns the array of property values.
   */
  function baseValues(object, props) {
    return arrayMap(props, function(key) {
      return object[key];
    });
  }

  /**
   * Checks if a `cache` value for `key` exists.
   *
   * @private
   * @param {Object} cache The cache to query.
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function cacheHas(cache, key) {
    return cache.has(key);
  }

  /**
   * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
   * that is not found in the character symbols.
   *
   * @private
   * @param {Array} strSymbols The string symbols to inspect.
   * @param {Array} chrSymbols The character symbols to find.
   * @returns {number} Returns the index of the first unmatched string symbol.
   */
  function charsStartIndex(strSymbols, chrSymbols) {
    var index = -1,
        length = strSymbols.length;

    while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
    return index;
  }

  /**
   * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
   * that is not found in the character symbols.
   *
   * @private
   * @param {Array} strSymbols The string symbols to inspect.
   * @param {Array} chrSymbols The character symbols to find.
   * @returns {number} Returns the index of the last unmatched string symbol.
   */
  function charsEndIndex(strSymbols, chrSymbols) {
    var index = strSymbols.length;

    while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
    return index;
  }

  /**
   * Gets the number of `placeholder` occurrences in `array`.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} placeholder The placeholder to search for.
   * @returns {number} Returns the placeholder count.
   */
  function countHolders(array, placeholder) {
    var length = array.length,
        result = 0;

    while (length--) {
      if (array[length] === placeholder) {
        ++result;
      }
    }
    return result;
  }

  /**
   * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
   * letters to basic Latin letters.
   *
   * @private
   * @param {string} letter The matched letter to deburr.
   * @returns {string} Returns the deburred letter.
   */
  var deburrLetter = basePropertyOf(deburredLetters);

  /**
   * Used by `_.escape` to convert characters to HTML entities.
   *
   * @private
   * @param {string} chr The matched character to escape.
   * @returns {string} Returns the escaped character.
   */
  var escapeHtmlChar = basePropertyOf(htmlEscapes);

  /**
   * Used by `_.template` to escape characters for inclusion in compiled string literals.
   *
   * @private
   * @param {string} chr The matched character to escape.
   * @returns {string} Returns the escaped character.
   */
  function escapeStringChar(chr) {
    return '\\' + stringEscapes[chr];
  }

  /**
   * Gets the value at `key` of `object`.
   *
   * @private
   * @param {Object} [object] The object to query.
   * @param {string} key The key of the property to get.
   * @returns {*} Returns the property value.
   */
  function getValue(object, key) {
    return object == null ? undefined : object[key];
  }

  /**
   * Checks if `string` contains Unicode symbols.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {boolean} Returns `true` if a symbol is found, else `false`.
   */
  function hasUnicode(string) {
    return reHasUnicode.test(string);
  }

  /**
   * Checks if `string` contains a word composed of Unicode symbols.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {boolean} Returns `true` if a word is found, else `false`.
   */
  function hasUnicodeWord(string) {
    return reHasUnicodeWord.test(string);
  }

  /**
   * Converts `iterator` to an array.
   *
   * @private
   * @param {Object} iterator The iterator to convert.
   * @returns {Array} Returns the converted array.
   */
  function iteratorToArray(iterator) {
    var data,
        result = [];

    while (!(data = iterator.next()).done) {
      result.push(data.value);
    }
    return result;
  }

  /**
   * Converts `map` to its key-value pairs.
   *
   * @private
   * @param {Object} map The map to convert.
   * @returns {Array} Returns the key-value pairs.
   */
  function mapToArray(map) {
    var index = -1,
        result = Array(map.size);

    map.forEach(function(value, key) {
      result[++index] = [key, value];
    });
    return result;
  }

  /**
   * Creates a unary function that invokes `func` with its argument transformed.
   *
   * @private
   * @param {Function} func The function to wrap.
   * @param {Function} transform The argument transform.
   * @returns {Function} Returns the new function.
   */
  function overArg(func, transform) {
    return function(arg) {
      return func(transform(arg));
    };
  }

  /**
   * Replaces all `placeholder` elements in `array` with an internal placeholder
   * and returns an array of their indexes.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {*} placeholder The placeholder to replace.
   * @returns {Array} Returns the new array of placeholder indexes.
   */
  function replaceHolders(array, placeholder) {
    var index = -1,
        length = array.length,
        resIndex = 0,
        result = [];

    while (++index < length) {
      var value = array[index];
      if (value === placeholder || value === PLACEHOLDER) {
        array[index] = PLACEHOLDER;
        result[resIndex++] = index;
      }
    }
    return result;
  }

  /**
   * Converts `set` to an array of its values.
   *
   * @private
   * @param {Object} set The set to convert.
   * @returns {Array} Returns the values.
   */
  function setToArray(set) {
    var index = -1,
        result = Array(set.size);

    set.forEach(function(value) {
      result[++index] = value;
    });
    return result;
  }

  /**
   * Converts `set` to its value-value pairs.
   *
   * @private
   * @param {Object} set The set to convert.
   * @returns {Array} Returns the value-value pairs.
   */
  function setToPairs(set) {
    var index = -1,
        result = Array(set.size);

    set.forEach(function(value) {
      result[++index] = [value, value];
    });
    return result;
  }

  /**
   * A specialized version of `_.indexOf` which performs strict equality
   * comparisons of values, i.e. `===`.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function strictIndexOf(array, value, fromIndex) {
    var index = fromIndex - 1,
        length = array.length;

    while (++index < length) {
      if (array[index] === value) {
        return index;
      }
    }
    return -1;
  }

  /**
   * A specialized version of `_.lastIndexOf` which performs strict equality
   * comparisons of values, i.e. `===`.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} value The value to search for.
   * @param {number} fromIndex The index to search from.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function strictLastIndexOf(array, value, fromIndex) {
    var index = fromIndex + 1;
    while (index--) {
      if (array[index] === value) {
        return index;
      }
    }
    return index;
  }

  /**
   * Gets the number of symbols in `string`.
   *
   * @private
   * @param {string} string The string to inspect.
   * @returns {number} Returns the string size.
   */
  function stringSize(string) {
    return hasUnicode(string)
      ? unicodeSize(string)
      : asciiSize(string);
  }

  /**
   * Converts `string` to an array.
   *
   * @private
   * @param {string} string The string to convert.
   * @returns {Array} Returns the converted array.
   */
  function stringToArray(string) {
    return hasUnicode(string)
      ? unicodeToArray(string)
      : asciiToArray(string);
  }

  /**
   * Used by `_.unescape` to convert HTML entities to characters.
   *
   * @private
   * @param {string} chr The matched character to unescape.
   * @returns {string} Returns the unescaped character.
   */
  var unescapeHtmlChar = basePropertyOf(htmlUnescapes);

  /**
   * Gets the size of a Unicode `string`.
   *
   * @private
   * @param {string} string The string inspect.
   * @returns {number} Returns the string size.
   */
  function unicodeSize(string) {
    var result = reUnicode.lastIndex = 0;
    while (reUnicode.test(string)) {
      ++result;
    }
    return result;
  }

  /**
   * Converts a Unicode `string` to an array.
   *
   * @private
   * @param {string} string The string to convert.
   * @returns {Array} Returns the converted array.
   */
  function unicodeToArray(string) {
    return string.match(reUnicode) || [];
  }

  /**
   * Splits a Unicode `string` into an array of its words.
   *
   * @private
   * @param {string} The string to inspect.
   * @returns {Array} Returns the words of `string`.
   */
  function unicodeWords(string) {
    return string.match(reUnicodeWord) || [];
  }

  /*--------------------------------------------------------------------------*/

  /**
   * Create a new pristine `lodash` function using the `context` object.
   *
   * @static
   * @memberOf _
   * @since 1.1.0
   * @category Util
   * @param {Object} [context=root] The context object.
   * @returns {Function} Returns a new `lodash` function.
   * @example
   *
   * _.mixin({ 'foo': _.constant('foo') });
   *
   * var lodash = _.runInContext();
   * lodash.mixin({ 'bar': lodash.constant('bar') });
   *
   * _.isFunction(_.foo);
   * // => true
   * _.isFunction(_.bar);
   * // => false
   *
   * lodash.isFunction(lodash.foo);
   * // => false
   * lodash.isFunction(lodash.bar);
   * // => true
   *
   * // Create a suped-up `defer` in Node.js.
   * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
   */
  var runInContext = (function runInContext(context) {
    context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));

    /** Built-in constructor references. */
    var Array = context.Array,
        Date = context.Date,
        Error = context.Error,
        Function = context.Function,
        Math = context.Math,
        Object = context.Object,
        RegExp = context.RegExp,
        String = context.String,
        TypeError = context.TypeError;

    /** Used for built-in method references. */
    var arrayProto = Array.prototype,
        funcProto = Function.prototype,
        objectProto = Object.prototype;

    /** Used to detect overreaching core-js shims. */
    var coreJsData = context['__core-js_shared__'];

    /** Used to resolve the decompiled source of functions. */
    var funcToString = funcProto.toString;

    /** Used to check objects for own properties. */
    var hasOwnProperty = objectProto.hasOwnProperty;

    /** Used to generate unique IDs. */
    var idCounter = 0;

    /** Used to detect methods masquerading as native. */
    var maskSrcKey = (function() {
      var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
      return uid ? ('Symbol(src)_1.' + uid) : '';
    }());

    /**
     * Used to resolve the
     * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
     * of values.
     */
    var nativeObjectToString = objectProto.toString;

    /** Used to infer the `Object` constructor. */
    var objectCtorString = funcToString.call(Object);

    /** Used to restore the original `_` reference in `_.noConflict`. */
    var oldDash = root._;

    /** Used to detect if a method is native. */
    var reIsNative = RegExp('^' +
      funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
      .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
    );

    /** Built-in value references. */
    var Buffer = moduleExports ? context.Buffer : undefined,
        Symbol = context.Symbol,
        Uint8Array = context.Uint8Array,
        allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
        getPrototype = overArg(Object.getPrototypeOf, Object),
        objectCreate = Object.create,
        propertyIsEnumerable = objectProto.propertyIsEnumerable,
        splice = arrayProto.splice,
        spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
        symIterator = Symbol ? Symbol.iterator : undefined,
        symToStringTag = Symbol ? Symbol.toStringTag : undefined;

    var defineProperty = (function() {
      try {
        var func = getNative(Object, 'defineProperty');
        func({}, '', {});
        return func;
      } catch (e) {}
    }());

    /** Mocked built-ins. */
    var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
        ctxNow = Date && Date.now !== root.Date.now && Date.now,
        ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;

    /* Built-in method references for those with the same name as other `lodash` methods. */
    var nativeCeil = Math.ceil,
        nativeFloor = Math.floor,
        nativeGetSymbols = Object.getOwnPropertySymbols,
        nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
        nativeIsFinite = context.isFinite,
        nativeJoin = arrayProto.join,
        nativeKeys = overArg(Object.keys, Object),
        nativeMax = Math.max,
        nativeMin = Math.min,
        nativeNow = Date.now,
        nativeParseInt = context.parseInt,
        nativeRandom = Math.random,
        nativeReverse = arrayProto.reverse;

    /* Built-in method references that are verified to be native. */
    var DataView = getNative(context, 'DataView'),
        Map = getNative(context, 'Map'),
        Promise = getNative(context, 'Promise'),
        Set = getNative(context, 'Set'),
        WeakMap = getNative(context, 'WeakMap'),
        nativeCreate = getNative(Object, 'create');

    /** Used to store function metadata. */
    var metaMap = WeakMap && new WeakMap;

    /** Used to lookup unminified function names. */
    var realNames = {};

    /** Used to detect maps, sets, and weakmaps. */
    var dataViewCtorString = toSource(DataView),
        mapCtorString = toSource(Map),
        promiseCtorString = toSource(Promise),
        setCtorString = toSource(Set),
        weakMapCtorString = toSource(WeakMap);

    /** Used to convert symbols to primitives and strings. */
    var symbolProto = Symbol ? Symbol.prototype : undefined,
        symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
        symbolToString = symbolProto ? symbolProto.toString : undefined;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object which wraps `value` to enable implicit method
     * chain sequences. Methods that operate on and return arrays, collections,
     * and functions can be chained together. Methods that retrieve a single value
     * or may return a primitive value will automatically end the chain sequence
     * and return the unwrapped value. Otherwise, the value must be unwrapped
     * with `_#value`.
     *
     * Explicit chain sequences, which must be unwrapped with `_#value`, may be
     * enabled using `_.chain`.
     *
     * The execution of chained methods is lazy, that is, it's deferred until
     * `_#value` is implicitly or explicitly called.
     *
     * Lazy evaluation allows several methods to support shortcut fusion.
     * Shortcut fusion is an optimization to merge iteratee calls; this avoids
     * the creation of intermediate arrays and can greatly reduce the number of
     * iteratee executions. Sections of a chain sequence qualify for shortcut
     * fusion if the section is applied to an array and iteratees accept only
     * one argument. The heuristic for whether a section qualifies for shortcut
     * fusion is subject to change.
     *
     * Chaining is supported in custom builds as long as the `_#value` method is
     * directly or indirectly included in the build.
     *
     * In addition to lodash methods, wrappers have `Array` and `String` methods.
     *
     * The wrapper `Array` methods are:
     * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
     *
     * The wrapper `String` methods are:
     * `replace` and `split`
     *
     * The wrapper methods that support shortcut fusion are:
     * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
     * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
     * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
     *
     * The chainable wrapper methods are:
     * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
     * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
     * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
     * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
     * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
     * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
     * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
     * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
     * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
     * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
     * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
     * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
     * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
     * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
     * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
     * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
     * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
     * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
     * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
     * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
     * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
     * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
     * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
     * `zipObject`, `zipObjectDeep`, and `zipWith`
     *
     * The wrapper methods that are **not** chainable by default are:
     * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
     * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
     * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
     * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
     * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
     * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
     * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
     * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
     * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
     * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
     * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
     * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
     * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
     * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
     * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
     * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
     * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
     * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
     * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
     * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
     * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
     * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
     * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
     * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
     * `upperFirst`, `value`, and `words`
     *
     * @name _
     * @constructor
     * @category Seq
     * @param {*} value The value to wrap in a `lodash` instance.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var wrapped = _([1, 2, 3]);
     *
     * // Returns an unwrapped value.
     * wrapped.reduce(_.add);
     * // => 6
     *
     * // Returns a wrapped value.
     * var squares = wrapped.map(square);
     *
     * _.isArray(squares);
     * // => false
     *
     * _.isArray(squares.value());
     * // => true
     */
    function lodash(value) {
      if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
        if (value instanceof LodashWrapper) {
          return value;
        }
        if (hasOwnProperty.call(value, '__wrapped__')) {
          return wrapperClone(value);
        }
      }
      return new LodashWrapper(value);
    }

    /**
     * The base implementation of `_.create` without support for assigning
     * properties to the created object.
     *
     * @private
     * @param {Object} proto The object to inherit from.
     * @returns {Object} Returns the new object.
     */
    var baseCreate = (function() {
      function object() {}
      return function(proto) {
        if (!isObject(proto)) {
          return {};
        }
        if (objectCreate) {
          return objectCreate(proto);
        }
        object.prototype = proto;
        var result = new object;
        object.prototype = undefined;
        return result;
      };
    }());

    /**
     * The function whose prototype chain sequence wrappers inherit from.
     *
     * @private
     */
    function baseLodash() {
      // No operation performed.
    }

    /**
     * The base constructor for creating `lodash` wrapper objects.
     *
     * @private
     * @param {*} value The value to wrap.
     * @param {boolean} [chainAll] Enable explicit method chain sequences.
     */
    function LodashWrapper(value, chainAll) {
      this.__wrapped__ = value;
      this.__actions__ = [];
      this.__chain__ = !!chainAll;
      this.__index__ = 0;
      this.__values__ = undefined;
    }

    /**
     * By default, the template delimiters used by lodash are like those in
     * embedded Ruby (ERB) as well as ES2015 template strings. Change the
     * following template settings to use alternative delimiters.
     *
     * @static
     * @memberOf _
     * @type {Object}
     */
    lodash.templateSettings = {

      /**
       * Used to detect `data` property values to be HTML-escaped.
       *
       * @memberOf _.templateSettings
       * @type {RegExp}
       */
      'escape': reEscape,

      /**
       * Used to detect code to be evaluated.
       *
       * @memberOf _.templateSettings
       * @type {RegExp}
       */
      'evaluate': reEvaluate,

      /**
       * Used to detect `data` property values to inject.
       *
       * @memberOf _.templateSettings
       * @type {RegExp}
       */
      'interpolate': reInterpolate,

      /**
       * Used to reference the data object in the template text.
       *
       * @memberOf _.templateSettings
       * @type {string}
       */
      'variable': '',

      /**
       * Used to import variables into the compiled template.
       *
       * @memberOf _.templateSettings
       * @type {Object}
       */
      'imports': {

        /**
         * A reference to the `lodash` function.
         *
         * @memberOf _.templateSettings.imports
         * @type {Function}
         */
        '_': lodash
      }
    };

    // Ensure wrappers are instances of `baseLodash`.
    lodash.prototype = baseLodash.prototype;
    lodash.prototype.constructor = lodash;

    LodashWrapper.prototype = baseCreate(baseLodash.prototype);
    LodashWrapper.prototype.constructor = LodashWrapper;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
     *
     * @private
     * @constructor
     * @param {*} value The value to wrap.
     */
    function LazyWrapper(value) {
      this.__wrapped__ = value;
      this.__actions__ = [];
      this.__dir__ = 1;
      this.__filtered__ = false;
      this.__iteratees__ = [];
      this.__takeCount__ = MAX_ARRAY_LENGTH;
      this.__views__ = [];
    }

    /**
     * Creates a clone of the lazy wrapper object.
     *
     * @private
     * @name clone
     * @memberOf LazyWrapper
     * @returns {Object} Returns the cloned `LazyWrapper` object.
     */
    function lazyClone() {
      var result = new LazyWrapper(this.__wrapped__);
      result.__actions__ = copyArray(this.__actions__);
      result.__dir__ = this.__dir__;
      result.__filtered__ = this.__filtered__;
      result.__iteratees__ = copyArray(this.__iteratees__);
      result.__takeCount__ = this.__takeCount__;
      result.__views__ = copyArray(this.__views__);
      return result;
    }

    /**
     * Reverses the direction of lazy iteration.
     *
     * @private
     * @name reverse
     * @memberOf LazyWrapper
     * @returns {Object} Returns the new reversed `LazyWrapper` object.
     */
    function lazyReverse() {
      if (this.__filtered__) {
        var result = new LazyWrapper(this);
        result.__dir__ = -1;
        result.__filtered__ = true;
      } else {
        result = this.clone();
        result.__dir__ *= -1;
      }
      return result;
    }

    /**
     * Extracts the unwrapped value from its lazy wrapper.
     *
     * @private
     * @name value
     * @memberOf LazyWrapper
     * @returns {*} Returns the unwrapped value.
     */
    function lazyValue() {
      var array = this.__wrapped__.value(),
          dir = this.__dir__,
          isArr = isArray(array),
          isRight = dir < 0,
          arrLength = isArr ? array.length : 0,
          view = getView(0, arrLength, this.__views__),
          start = view.start,
          end = view.end,
          length = end - start,
          index = isRight ? end : (start - 1),
          iteratees = this.__iteratees__,
          iterLength = iteratees.length,
          resIndex = 0,
          takeCount = nativeMin(length, this.__takeCount__);

      if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
        return baseWrapperValue(array, this.__actions__);
      }
      var result = [];

      outer:
      while (length-- && resIndex < takeCount) {
        index += dir;

        var iterIndex = -1,
            value = array[index];

        while (++iterIndex < iterLength) {
          var data = iteratees[iterIndex],
              iteratee = data.iteratee,
              type = data.type,
              computed = iteratee(value);

          if (type == LAZY_MAP_FLAG) {
            value = computed;
          } else if (!computed) {
            if (type == LAZY_FILTER_FLAG) {
              continue outer;
            } else {
              break outer;
            }
          }
        }
        result[resIndex++] = value;
      }
      return result;
    }

    // Ensure `LazyWrapper` is an instance of `baseLodash`.
    LazyWrapper.prototype = baseCreate(baseLodash.prototype);
    LazyWrapper.prototype.constructor = LazyWrapper;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a hash object.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function Hash(entries) {
      var index = -1,
          length = entries == null ? 0 : entries.length;

      this.clear();
      while (++index < length) {
        var entry = entries[index];
        this.set(entry[0], entry[1]);
      }
    }

    /**
     * Removes all key-value entries from the hash.
     *
     * @private
     * @name clear
     * @memberOf Hash
     */
    function hashClear() {
      this.__data__ = nativeCreate ? nativeCreate(null) : {};
      this.size = 0;
    }

    /**
     * Removes `key` and its value from the hash.
     *
     * @private
     * @name delete
     * @memberOf Hash
     * @param {Object} hash The hash to modify.
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function hashDelete(key) {
      var result = this.has(key) && delete this.__data__[key];
      this.size -= result ? 1 : 0;
      return result;
    }

    /**
     * Gets the hash value for `key`.
     *
     * @private
     * @name get
     * @memberOf Hash
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function hashGet(key) {
      var data = this.__data__;
      if (nativeCreate) {
        var result = data[key];
        return result === HASH_UNDEFINED ? undefined : result;
      }
      return hasOwnProperty.call(data, key) ? data[key] : undefined;
    }

    /**
     * Checks if a hash value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf Hash
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function hashHas(key) {
      var data = this.__data__;
      return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
    }

    /**
     * Sets the hash `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf Hash
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the hash instance.
     */
    function hashSet(key, value) {
      var data = this.__data__;
      this.size += this.has(key) ? 0 : 1;
      data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
      return this;
    }

    // Add methods to `Hash`.
    Hash.prototype.clear = hashClear;
    Hash.prototype['delete'] = hashDelete;
    Hash.prototype.get = hashGet;
    Hash.prototype.has = hashHas;
    Hash.prototype.set = hashSet;

    /*------------------------------------------------------------------------*/

    /**
     * Creates an list cache object.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function ListCache(entries) {
      var index = -1,
          length = entries == null ? 0 : entries.length;

      this.clear();
      while (++index < length) {
        var entry = entries[index];
        this.set(entry[0], entry[1]);
      }
    }

    /**
     * Removes all key-value entries from the list cache.
     *
     * @private
     * @name clear
     * @memberOf ListCache
     */
    function listCacheClear() {
      this.__data__ = [];
      this.size = 0;
    }

    /**
     * Removes `key` and its value from the list cache.
     *
     * @private
     * @name delete
     * @memberOf ListCache
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function listCacheDelete(key) {
      var data = this.__data__,
          index = assocIndexOf(data, key);

      if (index < 0) {
        return false;
      }
      var lastIndex = data.length - 1;
      if (index == lastIndex) {
        data.pop();
      } else {
        splice.call(data, index, 1);
      }
      --this.size;
      return true;
    }

    /**
     * Gets the list cache value for `key`.
     *
     * @private
     * @name get
     * @memberOf ListCache
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function listCacheGet(key) {
      var data = this.__data__,
          index = assocIndexOf(data, key);

      return index < 0 ? undefined : data[index][1];
    }

    /**
     * Checks if a list cache value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf ListCache
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function listCacheHas(key) {
      return assocIndexOf(this.__data__, key) > -1;
    }

    /**
     * Sets the list cache `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf ListCache
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the list cache instance.
     */
    function listCacheSet(key, value) {
      var data = this.__data__,
          index = assocIndexOf(data, key);

      if (index < 0) {
        ++this.size;
        data.push([key, value]);
      } else {
        data[index][1] = value;
      }
      return this;
    }

    // Add methods to `ListCache`.
    ListCache.prototype.clear = listCacheClear;
    ListCache.prototype['delete'] = listCacheDelete;
    ListCache.prototype.get = listCacheGet;
    ListCache.prototype.has = listCacheHas;
    ListCache.prototype.set = listCacheSet;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a map cache object to store key-value pairs.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function MapCache(entries) {
      var index = -1,
          length = entries == null ? 0 : entries.length;

      this.clear();
      while (++index < length) {
        var entry = entries[index];
        this.set(entry[0], entry[1]);
      }
    }

    /**
     * Removes all key-value entries from the map.
     *
     * @private
     * @name clear
     * @memberOf MapCache
     */
    function mapCacheClear() {
      this.size = 0;
      this.__data__ = {
        'hash': new Hash,
        'map': new (Map || ListCache),
        'string': new Hash
      };
    }

    /**
     * Removes `key` and its value from the map.
     *
     * @private
     * @name delete
     * @memberOf MapCache
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function mapCacheDelete(key) {
      var result = getMapData(this, key)['delete'](key);
      this.size -= result ? 1 : 0;
      return result;
    }

    /**
     * Gets the map value for `key`.
     *
     * @private
     * @name get
     * @memberOf MapCache
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function mapCacheGet(key) {
      return getMapData(this, key).get(key);
    }

    /**
     * Checks if a map value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf MapCache
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function mapCacheHas(key) {
      return getMapData(this, key).has(key);
    }

    /**
     * Sets the map `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf MapCache
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the map cache instance.
     */
    function mapCacheSet(key, value) {
      var data = getMapData(this, key),
          size = data.size;

      data.set(key, value);
      this.size += data.size == size ? 0 : 1;
      return this;
    }

    // Add methods to `MapCache`.
    MapCache.prototype.clear = mapCacheClear;
    MapCache.prototype['delete'] = mapCacheDelete;
    MapCache.prototype.get = mapCacheGet;
    MapCache.prototype.has = mapCacheHas;
    MapCache.prototype.set = mapCacheSet;

    /*------------------------------------------------------------------------*/

    /**
     *
     * Creates an array cache object to store unique values.
     *
     * @private
     * @constructor
     * @param {Array} [values] The values to cache.
     */
    function SetCache(values) {
      var index = -1,
          length = values == null ? 0 : values.length;

      this.__data__ = new MapCache;
      while (++index < length) {
        this.add(values[index]);
      }
    }

    /**
     * Adds `value` to the array cache.
     *
     * @private
     * @name add
     * @memberOf SetCache
     * @alias push
     * @param {*} value The value to cache.
     * @returns {Object} Returns the cache instance.
     */
    function setCacheAdd(value) {
      this.__data__.set(value, HASH_UNDEFINED);
      return this;
    }

    /**
     * Checks if `value` is in the array cache.
     *
     * @private
     * @name has
     * @memberOf SetCache
     * @param {*} value The value to search for.
     * @returns {number} Returns `true` if `value` is found, else `false`.
     */
    function setCacheHas(value) {
      return this.__data__.has(value);
    }

    // Add methods to `SetCache`.
    SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
    SetCache.prototype.has = setCacheHas;

    /*------------------------------------------------------------------------*/

    /**
     * Creates a stack cache object to store key-value pairs.
     *
     * @private
     * @constructor
     * @param {Array} [entries] The key-value pairs to cache.
     */
    function Stack(entries) {
      var data = this.__data__ = new ListCache(entries);
      this.size = data.size;
    }

    /**
     * Removes all key-value entries from the stack.
     *
     * @private
     * @name clear
     * @memberOf Stack
     */
    function stackClear() {
      this.__data__ = new ListCache;
      this.size = 0;
    }

    /**
     * Removes `key` and its value from the stack.
     *
     * @private
     * @name delete
     * @memberOf Stack
     * @param {string} key The key of the value to remove.
     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
     */
    function stackDelete(key) {
      var data = this.__data__,
          result = data['delete'](key);

      this.size = data.size;
      return result;
    }

    /**
     * Gets the stack value for `key`.
     *
     * @private
     * @name get
     * @memberOf Stack
     * @param {string} key The key of the value to get.
     * @returns {*} Returns the entry value.
     */
    function stackGet(key) {
      return this.__data__.get(key);
    }

    /**
     * Checks if a stack value for `key` exists.
     *
     * @private
     * @name has
     * @memberOf Stack
     * @param {string} key The key of the entry to check.
     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
     */
    function stackHas(key) {
      return this.__data__.has(key);
    }

    /**
     * Sets the stack `key` to `value`.
     *
     * @private
     * @name set
     * @memberOf Stack
     * @param {string} key The key of the value to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns the stack cache instance.
     */
    function stackSet(key, value) {
      var data = this.__data__;
      if (data instanceof ListCache) {
        var pairs = data.__data__;
        if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
          pairs.push([key, value]);
          this.size = ++data.size;
          return this;
        }
        data = this.__data__ = new MapCache(pairs);
      }
      data.set(key, value);
      this.size = data.size;
      return this;
    }

    // Add methods to `Stack`.
    Stack.prototype.clear = stackClear;
    Stack.prototype['delete'] = stackDelete;
    Stack.prototype.get = stackGet;
    Stack.prototype.has = stackHas;
    Stack.prototype.set = stackSet;

    /*------------------------------------------------------------------------*/

    /**
     * Creates an array of the enumerable property names of the array-like `value`.
     *
     * @private
     * @param {*} value The value to query.
     * @param {boolean} inherited Specify returning inherited property names.
     * @returns {Array} Returns the array of property names.
     */
    function arrayLikeKeys(value, inherited) {
      var isArr = isArray(value),
          isArg = !isArr && isArguments(value),
          isBuff = !isArr && !isArg && isBuffer(value),
          isType = !isArr && !isArg && !isBuff && isTypedArray(value),
          skipIndexes = isArr || isArg || isBuff || isType,
          result = skipIndexes ? baseTimes(value.length, String) : [],
          length = result.length;

      for (var key in value) {
        if ((inherited || hasOwnProperty.call(value, key)) &&
            !(skipIndexes && (
               // Safari 9 has enumerable `arguments.length` in strict mode.
               key == 'length' ||
               // Node.js 0.10 has enumerable non-index properties on buffers.
               (isBuff && (key == 'offset' || key == 'parent')) ||
               // PhantomJS 2 has enumerable non-index properties on typed arrays.
               (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
               // Skip index properties.
               isIndex(key, length)
            ))) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * A specialized version of `_.sample` for arrays.
     *
     * @private
     * @param {Array} array The array to sample.
     * @returns {*} Returns the random element.
     */
    function arraySample(array) {
      var length = array.length;
      return length ? array[baseRandom(0, length - 1)] : undefined;
    }

    /**
     * A specialized version of `_.sampleSize` for arrays.
     *
     * @private
     * @param {Array} array The array to sample.
     * @param {number} n The number of elements to sample.
     * @returns {Array} Returns the random elements.
     */
    function arraySampleSize(array, n) {
      return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
    }

    /**
     * A specialized version of `_.shuffle` for arrays.
     *
     * @private
     * @param {Array} array The array to shuffle.
     * @returns {Array} Returns the new shuffled array.
     */
    function arrayShuffle(array) {
      return shuffleSelf(copyArray(array));
    }

    /**
     * This function is like `assignValue` except that it doesn't assign
     * `undefined` values.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {string} key The key of the property to assign.
     * @param {*} value The value to assign.
     */
    function assignMergeValue(object, key, value) {
      if ((value !== undefined && !eq(object[key], value)) ||
          (value === undefined && !(key in object))) {
        baseAssignValue(object, key, value);
      }
    }

    /**
     * Assigns `value` to `key` of `object` if the existing value is not equivalent
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {string} key The key of the property to assign.
     * @param {*} value The value to assign.
     */
    function assignValue(object, key, value) {
      var objValue = object[key];
      if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
          (value === undefined && !(key in object))) {
        baseAssignValue(object, key, value);
      }
    }

    /**
     * Gets the index at which the `key` is found in `array` of key-value pairs.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {*} key The key to search for.
     * @returns {number} Returns the index of the matched value, else `-1`.
     */
    function assocIndexOf(array, key) {
      var length = array.length;
      while (length--) {
        if (eq(array[length][0], key)) {
          return length;
        }
      }
      return -1;
    }

    /**
     * Aggregates elements of `collection` on `accumulator` with keys transformed
     * by `iteratee` and values set by `setter`.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} setter The function to set `accumulator` values.
     * @param {Function} iteratee The iteratee to transform keys.
     * @param {Object} accumulator The initial aggregated object.
     * @returns {Function} Returns `accumulator`.
     */
    function baseAggregator(collection, setter, iteratee, accumulator) {
      baseEach(collection, function(value, key, collection) {
        setter(accumulator, value, iteratee(value), collection);
      });
      return accumulator;
    }

    /**
     * The base implementation of `_.assign` without support for multiple sources
     * or `customizer` functions.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @returns {Object} Returns `object`.
     */
    function baseAssign(object, source) {
      return object && copyObject(source, keys(source), object);
    }

    /**
     * The base implementation of `_.assignIn` without support for multiple sources
     * or `customizer` functions.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @returns {Object} Returns `object`.
     */
    function baseAssignIn(object, source) {
      return object && copyObject(source, keysIn(source), object);
    }

    /**
     * The base implementation of `assignValue` and `assignMergeValue` without
     * value checks.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {string} key The key of the property to assign.
     * @param {*} value The value to assign.
     */
    function baseAssignValue(object, key, value) {
      if (key == '__proto__' && defineProperty) {
        defineProperty(object, key, {
          'configurable': true,
          'enumerable': true,
          'value': value,
          'writable': true
        });
      } else {
        object[key] = value;
      }
    }

    /**
     * The base implementation of `_.at` without support for individual paths.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {string[]} paths The property paths to pick.
     * @returns {Array} Returns the picked elements.
     */
    function baseAt(object, paths) {
      var index = -1,
          length = paths.length,
          result = Array(length),
          skip = object == null;

      while (++index < length) {
        result[index] = skip ? undefined : get(object, paths[index]);
      }
      return result;
    }

    /**
     * The base implementation of `_.clamp` which doesn't coerce arguments.
     *
     * @private
     * @param {number} number The number to clamp.
     * @param {number} [lower] The lower bound.
     * @param {number} upper The upper bound.
     * @returns {number} Returns the clamped number.
     */
    function baseClamp(number, lower, upper) {
      if (number === number) {
        if (upper !== undefined) {
          number = number <= upper ? number : upper;
        }
        if (lower !== undefined) {
          number = number >= lower ? number : lower;
        }
      }
      return number;
    }

    /**
     * The base implementation of `_.clone` and `_.cloneDeep` which tracks
     * traversed objects.
     *
     * @private
     * @param {*} value The value to clone.
     * @param {boolean} bitmask The bitmask flags.
     *  1 - Deep clone
     *  2 - Flatten inherited properties
     *  4 - Clone symbols
     * @param {Function} [customizer] The function to customize cloning.
     * @param {string} [key] The key of `value`.
     * @param {Object} [object] The parent object of `value`.
     * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
     * @returns {*} Returns the cloned value.
     */
    function baseClone(value, bitmask, customizer, key, object, stack) {
      var result,
          isDeep = bitmask & CLONE_DEEP_FLAG,
          isFlat = bitmask & CLONE_FLAT_FLAG,
          isFull = bitmask & CLONE_SYMBOLS_FLAG;

      if (customizer) {
        result = object ? customizer(value, key, object, stack) : customizer(value);
      }
      if (result !== undefined) {
        return result;
      }
      if (!isObject(value)) {
        return value;
      }
      var isArr = isArray(value);
      if (isArr) {
        result = initCloneArray(value);
        if (!isDeep) {
          return copyArray(value, result);
        }
      } else {
        var tag = getTag(value),
            isFunc = tag == funcTag || tag == genTag;

        if (isBuffer(value)) {
          return cloneBuffer(value, isDeep);
        }
        if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
          result = (isFlat || isFunc) ? {} : initCloneObject(value);
          if (!isDeep) {
            return isFlat
              ? copySymbolsIn(value, baseAssignIn(result, value))
              : copySymbols(value, baseAssign(result, value));
          }
        } else {
          if (!cloneableTags[tag]) {
            return object ? value : {};
          }
          result = initCloneByTag(value, tag, baseClone, isDeep);
        }
      }
      // Check for circular references and return its corresponding clone.
      stack || (stack = new Stack);
      var stacked = stack.get(value);
      if (stacked) {
        return stacked;
      }
      stack.set(value, result);

      var keysFunc = isFull
        ? (isFlat ? getAllKeysIn : getAllKeys)
        : (isFlat ? keysIn : keys);

      var props = isArr ? undefined : keysFunc(value);
      arrayEach(props || value, function(subValue, key) {
        if (props) {
          key = subValue;
          subValue = value[key];
        }
        // Recursively populate clone (susceptible to call stack limits).
        assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
      });
      return result;
    }

    /**
     * The base implementation of `_.conforms` which doesn't clone `source`.
     *
     * @private
     * @param {Object} source The object of property predicates to conform to.
     * @returns {Function} Returns the new spec function.
     */
    function baseConforms(source) {
      var props = keys(source);
      return function(object) {
        return baseConformsTo(object, source, props);
      };
    }

    /**
     * The base implementation of `_.conformsTo` which accepts `props` to check.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property predicates to conform to.
     * @returns {boolean} Returns `true` if `object` conforms, else `false`.
     */
    function baseConformsTo(object, source, props) {
      var length = props.length;
      if (object == null) {
        return !length;
      }
      object = Object(object);
      while (length--) {
        var key = props[length],
            predicate = source[key],
            value = object[key];

        if ((value === undefined && !(key in object)) || !predicate(value)) {
          return false;
        }
      }
      return true;
    }

    /**
     * The base implementation of `_.delay` and `_.defer` which accepts `args`
     * to provide to `func`.
     *
     * @private
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @param {Array} args The arguments to provide to `func`.
     * @returns {number|Object} Returns the timer id or timeout object.
     */
    function baseDelay(func, wait, args) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      return setTimeout(function() { func.apply(undefined, args); }, wait);
    }

    /**
     * The base implementation of methods like `_.difference` without support
     * for excluding multiple arrays or iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Array} values The values to exclude.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     */
    function baseDifference(array, values, iteratee, comparator) {
      var index = -1,
          includes = arrayIncludes,
          isCommon = true,
          length = array.length,
          result = [],
          valuesLength = values.length;

      if (!length) {
        return result;
      }
      if (iteratee) {
        values = arrayMap(values, baseUnary(iteratee));
      }
      if (comparator) {
        includes = arrayIncludesWith;
        isCommon = false;
      }
      else if (values.length >= LARGE_ARRAY_SIZE) {
        includes = cacheHas;
        isCommon = false;
        values = new SetCache(values);
      }
      outer:
      while (++index < length) {
        var value = array[index],
            computed = iteratee == null ? value : iteratee(value);

        value = (comparator || value !== 0) ? value : 0;
        if (isCommon && computed === computed) {
          var valuesIndex = valuesLength;
          while (valuesIndex--) {
            if (values[valuesIndex] === computed) {
              continue outer;
            }
          }
          result.push(value);
        }
        else if (!includes(values, computed, comparator)) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.forEach` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     */
    var baseEach = createBaseEach(baseForOwn);

    /**
     * The base implementation of `_.forEachRight` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     */
    var baseEachRight = createBaseEach(baseForOwnRight, true);

    /**
     * The base implementation of `_.every` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`
     */
    function baseEvery(collection, predicate) {
      var result = true;
      baseEach(collection, function(value, index, collection) {
        result = !!predicate(value, index, collection);
        return result;
      });
      return result;
    }

    /**
     * The base implementation of methods like `_.max` and `_.min` which accepts a
     * `comparator` to determine the extremum value.
     *
     * @private
     * @param {Array} array The array to iterate over.
     * @param {Function} iteratee The iteratee invoked per iteration.
     * @param {Function} comparator The comparator used to compare values.
     * @returns {*} Returns the extremum value.
     */
    function baseExtremum(array, iteratee, comparator) {
      var index = -1,
          length = array.length;

      while (++index < length) {
        var value = array[index],
            current = iteratee(value);

        if (current != null && (computed === undefined
              ? (current === current && !isSymbol(current))
              : comparator(current, computed)
            )) {
          var computed = current,
              result = value;
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.fill` without an iteratee call guard.
     *
     * @private
     * @param {Array} array The array to fill.
     * @param {*} value The value to fill `array` with.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns `array`.
     */
    function baseFill(array, value, start, end) {
      var length = array.length;

      start = toInteger(start);
      if (start < 0) {
        start = -start > length ? 0 : (length + start);
      }
      end = (end === undefined || end > length) ? length : toInteger(end);
      if (end < 0) {
        end += length;
      }
      end = start > end ? 0 : toLength(end);
      while (start < end) {
        array[start++] = value;
      }
      return array;
    }

    /**
     * The base implementation of `_.filter` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     */
    function baseFilter(collection, predicate) {
      var result = [];
      baseEach(collection, function(value, index, collection) {
        if (predicate(value, index, collection)) {
          result.push(value);
        }
      });
      return result;
    }

    /**
     * The base implementation of `_.flatten` with support for restricting flattening.
     *
     * @private
     * @param {Array} array The array to flatten.
     * @param {number} depth The maximum recursion depth.
     * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
     * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
     * @param {Array} [result=[]] The initial result value.
     * @returns {Array} Returns the new flattened array.
     */
    function baseFlatten(array, depth, predicate, isStrict, result) {
      var index = -1,
          length = array.length;

      predicate || (predicate = isFlattenable);
      result || (result = []);

      while (++index < length) {
        var value = array[index];
        if (depth > 0 && predicate(value)) {
          if (depth > 1) {
            // Recursively flatten arrays (susceptible to call stack limits).
            baseFlatten(value, depth - 1, predicate, isStrict, result);
          } else {
            arrayPush(result, value);
          }
        } else if (!isStrict) {
          result[result.length] = value;
        }
      }
      return result;
    }

    /**
     * The base implementation of `baseForOwn` which iterates over `object`
     * properties returned by `keysFunc` and invokes `iteratee` for each property.
     * Iteratee functions may exit iteration early by explicitly returning `false`.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @returns {Object} Returns `object`.
     */
    var baseFor = createBaseFor();

    /**
     * This function is like `baseFor` except that it iterates over properties
     * in the opposite order.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @returns {Object} Returns `object`.
     */
    var baseForRight = createBaseFor(true);

    /**
     * The base implementation of `_.forOwn` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Object} Returns `object`.
     */
    function baseForOwn(object, iteratee) {
      return object && baseFor(object, iteratee, keys);
    }

    /**
     * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Object} Returns `object`.
     */
    function baseForOwnRight(object, iteratee) {
      return object && baseForRight(object, iteratee, keys);
    }

    /**
     * The base implementation of `_.functions` which creates an array of
     * `object` function property names filtered from `props`.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Array} props The property names to filter.
     * @returns {Array} Returns the function names.
     */
    function baseFunctions(object, props) {
      return arrayFilter(props, function(key) {
        return isFunction(object[key]);
      });
    }

    /**
     * The base implementation of `_.get` without support for default values.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to get.
     * @returns {*} Returns the resolved value.
     */
    function baseGet(object, path) {
      path = castPath(path, object);

      var index = 0,
          length = path.length;

      while (object != null && index < length) {
        object = object[toKey(path[index++])];
      }
      return (index && index == length) ? object : undefined;
    }

    /**
     * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
     * `keysFunc` and `symbolsFunc` to get the enumerable property names and
     * symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Function} keysFunc The function to get the keys of `object`.
     * @param {Function} symbolsFunc The function to get the symbols of `object`.
     * @returns {Array} Returns the array of property names and symbols.
     */
    function baseGetAllKeys(object, keysFunc, symbolsFunc) {
      var result = keysFunc(object);
      return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
    }

    /**
     * The base implementation of `getTag` without fallbacks for buggy environments.
     *
     * @private
     * @param {*} value The value to query.
     * @returns {string} Returns the `toStringTag`.
     */
    function baseGetTag(value) {
      if (value == null) {
        return value === undefined ? undefinedTag : nullTag;
      }
      return (symToStringTag && symToStringTag in Object(value))
        ? getRawTag(value)
        : objectToString(value);
    }

    /**
     * The base implementation of `_.gt` which doesn't coerce arguments.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than `other`,
     *  else `false`.
     */
    function baseGt(value, other) {
      return value > other;
    }

    /**
     * The base implementation of `_.has` without support for deep paths.
     *
     * @private
     * @param {Object} [object] The object to query.
     * @param {Array|string} key The key to check.
     * @returns {boolean} Returns `true` if `key` exists, else `false`.
     */
    function baseHas(object, key) {
      return object != null && hasOwnProperty.call(object, key);
    }

    /**
     * The base implementation of `_.hasIn` without support for deep paths.
     *
     * @private
     * @param {Object} [object] The object to query.
     * @param {Array|string} key The key to check.
     * @returns {boolean} Returns `true` if `key` exists, else `false`.
     */
    function baseHasIn(object, key) {
      return object != null && key in Object(object);
    }

    /**
     * The base implementation of `_.inRange` which doesn't coerce arguments.
     *
     * @private
     * @param {number} number The number to check.
     * @param {number} start The start of the range.
     * @param {number} end The end of the range.
     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
     */
    function baseInRange(number, start, end) {
      return number >= nativeMin(start, end) && number < nativeMax(start, end);
    }

    /**
     * The base implementation of methods like `_.intersection`, without support
     * for iteratee shorthands, that accepts an array of arrays to inspect.
     *
     * @private
     * @param {Array} arrays The arrays to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of shared values.
     */
    function baseIntersection(arrays, iteratee, comparator) {
      var includes = comparator ? arrayIncludesWith : arrayIncludes,
          length = arrays[0].length,
          othLength = arrays.length,
          othIndex = othLength,
          caches = Array(othLength),
          maxLength = Infinity,
          result = [];

      while (othIndex--) {
        var array = arrays[othIndex];
        if (othIndex && iteratee) {
          array = arrayMap(array, baseUnary(iteratee));
        }
        maxLength = nativeMin(array.length, maxLength);
        caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
          ? new SetCache(othIndex && array)
          : undefined;
      }
      array = arrays[0];

      var index = -1,
          seen = caches[0];

      outer:
      while (++index < length && result.length < maxLength) {
        var value = array[index],
            computed = iteratee ? iteratee(value) : value;

        value = (comparator || value !== 0) ? value : 0;
        if (!(seen
              ? cacheHas(seen, computed)
              : includes(result, computed, comparator)
            )) {
          othIndex = othLength;
          while (--othIndex) {
            var cache = caches[othIndex];
            if (!(cache
                  ? cacheHas(cache, computed)
                  : includes(arrays[othIndex], computed, comparator))
                ) {
              continue outer;
            }
          }
          if (seen) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.invert` and `_.invertBy` which inverts
     * `object` with values transformed by `iteratee` and set by `setter`.
     *
     * @private
     * @param {Object} object The object to iterate over.
     * @param {Function} setter The function to set `accumulator` values.
     * @param {Function} iteratee The iteratee to transform values.
     * @param {Object} accumulator The initial inverted object.
     * @returns {Function} Returns `accumulator`.
     */
    function baseInverter(object, setter, iteratee, accumulator) {
      baseForOwn(object, function(value, key, object) {
        setter(accumulator, iteratee(value), key, object);
      });
      return accumulator;
    }

    /**
     * The base implementation of `_.invoke` without support for individual
     * method arguments.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the method to invoke.
     * @param {Array} args The arguments to invoke the method with.
     * @returns {*} Returns the result of the invoked method.
     */
    function baseInvoke(object, path, args) {
      path = castPath(path, object);
      object = parent(object, path);
      var func = object == null ? object : object[toKey(last(path))];
      return func == null ? undefined : apply(func, object, args);
    }

    /**
     * The base implementation of `_.isArguments`.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an `arguments` object,
     */
    function baseIsArguments(value) {
      return isObjectLike(value) && baseGetTag(value) == argsTag;
    }

    /**
     * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
     */
    function baseIsArrayBuffer(value) {
      return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
    }

    /**
     * The base implementation of `_.isDate` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
     */
    function baseIsDate(value) {
      return isObjectLike(value) && baseGetTag(value) == dateTag;
    }

    /**
     * The base implementation of `_.isEqual` which supports partial comparisons
     * and tracks traversed objects.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @param {boolean} bitmask The bitmask flags.
     *  1 - Unordered comparison
     *  2 - Partial comparison
     * @param {Function} [customizer] The function to customize comparisons.
     * @param {Object} [stack] Tracks traversed `value` and `other` objects.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     */
    function baseIsEqual(value, other, bitmask, customizer, stack) {
      if (value === other) {
        return true;
      }
      if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
        return value !== value && other !== other;
      }
      return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
    }

    /**
     * A specialized version of `baseIsEqual` for arrays and objects which performs
     * deep comparisons and tracks traversed objects enabling objects with circular
     * references to be compared.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} [stack] Tracks traversed `object` and `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
      var objIsArr = isArray(object),
          othIsArr = isArray(other),
          objTag = objIsArr ? arrayTag : getTag(object),
          othTag = othIsArr ? arrayTag : getTag(other);

      objTag = objTag == argsTag ? objectTag : objTag;
      othTag = othTag == argsTag ? objectTag : othTag;

      var objIsObj = objTag == objectTag,
          othIsObj = othTag == objectTag,
          isSameTag = objTag == othTag;

      if (isSameTag && isBuffer(object)) {
        if (!isBuffer(other)) {
          return false;
        }
        objIsArr = true;
        objIsObj = false;
      }
      if (isSameTag && !objIsObj) {
        stack || (stack = new Stack);
        return (objIsArr || isTypedArray(object))
          ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
          : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
      }
      if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
        var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
            othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');

        if (objIsWrapped || othIsWrapped) {
          var objUnwrapped = objIsWrapped ? object.value() : object,
              othUnwrapped = othIsWrapped ? other.value() : other;

          stack || (stack = new Stack);
          return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
        }
      }
      if (!isSameTag) {
        return false;
      }
      stack || (stack = new Stack);
      return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
    }

    /**
     * The base implementation of `_.isMap` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a map, else `false`.
     */
    function baseIsMap(value) {
      return isObjectLike(value) && getTag(value) == mapTag;
    }

    /**
     * The base implementation of `_.isMatch` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property values to match.
     * @param {Array} matchData The property names, values, and compare flags to match.
     * @param {Function} [customizer] The function to customize comparisons.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     */
    function baseIsMatch(object, source, matchData, customizer) {
      var index = matchData.length,
          length = index,
          noCustomizer = !customizer;

      if (object == null) {
        return !length;
      }
      object = Object(object);
      while (index--) {
        var data = matchData[index];
        if ((noCustomizer && data[2])
              ? data[1] !== object[data[0]]
              : !(data[0] in object)
            ) {
          return false;
        }
      }
      while (++index < length) {
        data = matchData[index];
        var key = data[0],
            objValue = object[key],
            srcValue = data[1];

        if (noCustomizer && data[2]) {
          if (objValue === undefined && !(key in object)) {
            return false;
          }
        } else {
          var stack = new Stack;
          if (customizer) {
            var result = customizer(objValue, srcValue, key, object, source, stack);
          }
          if (!(result === undefined
                ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
                : result
              )) {
            return false;
          }
        }
      }
      return true;
    }

    /**
     * The base implementation of `_.isNative` without bad shim checks.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a native function,
     *  else `false`.
     */
    function baseIsNative(value) {
      if (!isObject(value) || isMasked(value)) {
        return false;
      }
      var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
      return pattern.test(toSource(value));
    }

    /**
     * The base implementation of `_.isRegExp` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
     */
    function baseIsRegExp(value) {
      return isObjectLike(value) && baseGetTag(value) == regexpTag;
    }

    /**
     * The base implementation of `_.isSet` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a set, else `false`.
     */
    function baseIsSet(value) {
      return isObjectLike(value) && getTag(value) == setTag;
    }

    /**
     * The base implementation of `_.isTypedArray` without Node.js optimizations.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
     */
    function baseIsTypedArray(value) {
      return isObjectLike(value) &&
        isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
    }

    /**
     * The base implementation of `_.iteratee`.
     *
     * @private
     * @param {*} [value=_.identity] The value to convert to an iteratee.
     * @returns {Function} Returns the iteratee.
     */
    function baseIteratee(value) {
      // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
      // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
      if (typeof value == 'function') {
        return value;
      }
      if (value == null) {
        return identity;
      }
      if (typeof value == 'object') {
        return isArray(value)
          ? baseMatchesProperty(value[0], value[1])
          : baseMatches(value);
      }
      return property(value);
    }

    /**
     * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     */
    function baseKeys(object) {
      if (!isPrototype(object)) {
        return nativeKeys(object);
      }
      var result = [];
      for (var key in Object(object)) {
        if (hasOwnProperty.call(object, key) && key != 'constructor') {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     */
    function baseKeysIn(object) {
      if (!isObject(object)) {
        return nativeKeysIn(object);
      }
      var isProto = isPrototype(object),
          result = [];

      for (var key in object) {
        if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.lt` which doesn't coerce arguments.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than `other`,
     *  else `false`.
     */
    function baseLt(value, other) {
      return value < other;
    }

    /**
     * The base implementation of `_.map` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} iteratee The function invoked per iteration.
     * @returns {Array} Returns the new mapped array.
     */
    function baseMap(collection, iteratee) {
      var index = -1,
          result = isArrayLike(collection) ? Array(collection.length) : [];

      baseEach(collection, function(value, key, collection) {
        result[++index] = iteratee(value, key, collection);
      });
      return result;
    }

    /**
     * The base implementation of `_.matches` which doesn't clone `source`.
     *
     * @private
     * @param {Object} source The object of property values to match.
     * @returns {Function} Returns the new spec function.
     */
    function baseMatches(source) {
      var matchData = getMatchData(source);
      if (matchData.length == 1 && matchData[0][2]) {
        return matchesStrictComparable(matchData[0][0], matchData[0][1]);
      }
      return function(object) {
        return object === source || baseIsMatch(object, source, matchData);
      };
    }

    /**
     * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
     *
     * @private
     * @param {string} path The path of the property to get.
     * @param {*} srcValue The value to match.
     * @returns {Function} Returns the new spec function.
     */
    function baseMatchesProperty(path, srcValue) {
      if (isKey(path) && isStrictComparable(srcValue)) {
        return matchesStrictComparable(toKey(path), srcValue);
      }
      return function(object) {
        var objValue = get(object, path);
        return (objValue === undefined && objValue === srcValue)
          ? hasIn(object, path)
          : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
      };
    }

    /**
     * The base implementation of `_.merge` without support for multiple sources.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {number} srcIndex The index of `source`.
     * @param {Function} [customizer] The function to customize merged values.
     * @param {Object} [stack] Tracks traversed source values and their merged
     *  counterparts.
     */
    function baseMerge(object, source, srcIndex, customizer, stack) {
      if (object === source) {
        return;
      }
      baseFor(source, function(srcValue, key) {
        if (isObject(srcValue)) {
          stack || (stack = new Stack);
          baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
        }
        else {
          var newValue = customizer
            ? customizer(object[key], srcValue, (key + ''), object, source, stack)
            : undefined;

          if (newValue === undefined) {
            newValue = srcValue;
          }
          assignMergeValue(object, key, newValue);
        }
      }, keysIn);
    }

    /**
     * A specialized version of `baseMerge` for arrays and objects which performs
     * deep merges and tracks traversed objects enabling objects with circular
     * references to be merged.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {string} key The key of the value to merge.
     * @param {number} srcIndex The index of `source`.
     * @param {Function} mergeFunc The function to merge values.
     * @param {Function} [customizer] The function to customize assigned values.
     * @param {Object} [stack] Tracks traversed source values and their merged
     *  counterparts.
     */
    function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
      var objValue = object[key],
          srcValue = source[key],
          stacked = stack.get(srcValue);

      if (stacked) {
        assignMergeValue(object, key, stacked);
        return;
      }
      var newValue = customizer
        ? customizer(objValue, srcValue, (key + ''), object, source, stack)
        : undefined;

      var isCommon = newValue === undefined;

      if (isCommon) {
        var isArr = isArray(srcValue),
            isBuff = !isArr && isBuffer(srcValue),
            isTyped = !isArr && !isBuff && isTypedArray(srcValue);

        newValue = srcValue;
        if (isArr || isBuff || isTyped) {
          if (isArray(objValue)) {
            newValue = objValue;
          }
          else if (isArrayLikeObject(objValue)) {
            newValue = copyArray(objValue);
          }
          else if (isBuff) {
            isCommon = false;
            newValue = cloneBuffer(srcValue, true);
          }
          else if (isTyped) {
            isCommon = false;
            newValue = cloneTypedArray(srcValue, true);
          }
          else {
            newValue = [];
          }
        }
        else if (isPlainObject(srcValue) || isArguments(srcValue)) {
          newValue = objValue;
          if (isArguments(objValue)) {
            newValue = toPlainObject(objValue);
          }
          else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
            newValue = initCloneObject(srcValue);
          }
        }
        else {
          isCommon = false;
        }
      }
      if (isCommon) {
        // Recursively merge objects and arrays (susceptible to call stack limits).
        stack.set(srcValue, newValue);
        mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
        stack['delete'](srcValue);
      }
      assignMergeValue(object, key, newValue);
    }

    /**
     * The base implementation of `_.nth` which doesn't coerce arguments.
     *
     * @private
     * @param {Array} array The array to query.
     * @param {number} n The index of the element to return.
     * @returns {*} Returns the nth element of `array`.
     */
    function baseNth(array, n) {
      var length = array.length;
      if (!length) {
        return;
      }
      n += n < 0 ? length : 0;
      return isIndex(n, length) ? array[n] : undefined;
    }

    /**
     * The base implementation of `_.orderBy` without param guards.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
     * @param {string[]} orders The sort orders of `iteratees`.
     * @returns {Array} Returns the new sorted array.
     */
    function baseOrderBy(collection, iteratees, orders) {
      var index = -1;
      iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));

      var result = baseMap(collection, function(value, key, collection) {
        var criteria = arrayMap(iteratees, function(iteratee) {
          return iteratee(value);
        });
        return { 'criteria': criteria, 'index': ++index, 'value': value };
      });

      return baseSortBy(result, function(object, other) {
        return compareMultiple(object, other, orders);
      });
    }

    /**
     * The base implementation of `_.pick` without support for individual
     * property identifiers.
     *
     * @private
     * @param {Object} object The source object.
     * @param {string[]} paths The property paths to pick.
     * @returns {Object} Returns the new object.
     */
    function basePick(object, paths) {
      return basePickBy(object, paths, function(value, path) {
        return hasIn(object, path);
      });
    }

    /**
     * The base implementation of  `_.pickBy` without support for iteratee shorthands.
     *
     * @private
     * @param {Object} object The source object.
     * @param {string[]} paths The property paths to pick.
     * @param {Function} predicate The function invoked per property.
     * @returns {Object} Returns the new object.
     */
    function basePickBy(object, paths, predicate) {
      var index = -1,
          length = paths.length,
          result = {};

      while (++index < length) {
        var path = paths[index],
            value = baseGet(object, path);

        if (predicate(value, path)) {
          baseSet(result, castPath(path, object), value);
        }
      }
      return result;
    }

    /**
     * A specialized version of `baseProperty` which supports deep paths.
     *
     * @private
     * @param {Array|string} path The path of the property to get.
     * @returns {Function} Returns the new accessor function.
     */
    function basePropertyDeep(path) {
      return function(object) {
        return baseGet(object, path);
      };
    }

    /**
     * The base implementation of `_.pullAllBy` without support for iteratee
     * shorthands.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns `array`.
     */
    function basePullAll(array, values, iteratee, comparator) {
      var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
          index = -1,
          length = values.length,
          seen = array;

      if (array === values) {
        values = copyArray(values);
      }
      if (iteratee) {
        seen = arrayMap(array, baseUnary(iteratee));
      }
      while (++index < length) {
        var fromIndex = 0,
            value = values[index],
            computed = iteratee ? iteratee(value) : value;

        while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
          if (seen !== array) {
            splice.call(seen, fromIndex, 1);
          }
          splice.call(array, fromIndex, 1);
        }
      }
      return array;
    }

    /**
     * The base implementation of `_.pullAt` without support for individual
     * indexes or capturing the removed elements.
     *
     * @private
     * @param {Array} array The array to modify.
     * @param {number[]} indexes The indexes of elements to remove.
     * @returns {Array} Returns `array`.
     */
    function basePullAt(array, indexes) {
      var length = array ? indexes.length : 0,
          lastIndex = length - 1;

      while (length--) {
        var index = indexes[length];
        if (length == lastIndex || index !== previous) {
          var previous = index;
          if (isIndex(index)) {
            splice.call(array, index, 1);
          } else {
            baseUnset(array, index);
          }
        }
      }
      return array;
    }

    /**
     * The base implementation of `_.random` without support for returning
     * floating-point numbers.
     *
     * @private
     * @param {number} lower The lower bound.
     * @param {number} upper The upper bound.
     * @returns {number} Returns the random number.
     */
    function baseRandom(lower, upper) {
      return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
    }

    /**
     * The base implementation of `_.range` and `_.rangeRight` which doesn't
     * coerce arguments.
     *
     * @private
     * @param {number} start The start of the range.
     * @param {number} end The end of the range.
     * @param {number} step The value to increment or decrement by.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Array} Returns the range of numbers.
     */
    function baseRange(start, end, step, fromRight) {
      var index = -1,
          length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
          result = Array(length);

      while (length--) {
        result[fromRight ? length : ++index] = start;
        start += step;
      }
      return result;
    }

    /**
     * The base implementation of `_.repeat` which doesn't coerce arguments.
     *
     * @private
     * @param {string} string The string to repeat.
     * @param {number} n The number of times to repeat the string.
     * @returns {string} Returns the repeated string.
     */
    function baseRepeat(string, n) {
      var result = '';
      if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
        return result;
      }
      // Leverage the exponentiation by squaring algorithm for a faster repeat.
      // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
      do {
        if (n % 2) {
          result += string;
        }
        n = nativeFloor(n / 2);
        if (n) {
          string += string;
        }
      } while (n);

      return result;
    }

    /**
     * The base implementation of `_.rest` which doesn't validate or coerce arguments.
     *
     * @private
     * @param {Function} func The function to apply a rest parameter to.
     * @param {number} [start=func.length-1] The start position of the rest parameter.
     * @returns {Function} Returns the new function.
     */
    function baseRest(func, start) {
      return setToString(overRest(func, start, identity), func + '');
    }

    /**
     * The base implementation of `_.sample`.
     *
     * @private
     * @param {Array|Object} collection The collection to sample.
     * @returns {*} Returns the random element.
     */
    function baseSample(collection) {
      return arraySample(values(collection));
    }

    /**
     * The base implementation of `_.sampleSize` without param guards.
     *
     * @private
     * @param {Array|Object} collection The collection to sample.
     * @param {number} n The number of elements to sample.
     * @returns {Array} Returns the random elements.
     */
    function baseSampleSize(collection, n) {
      var array = values(collection);
      return shuffleSelf(array, baseClamp(n, 0, array.length));
    }

    /**
     * The base implementation of `_.set`.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {*} value The value to set.
     * @param {Function} [customizer] The function to customize path creation.
     * @returns {Object} Returns `object`.
     */
    function baseSet(object, path, value, customizer) {
      if (!isObject(object)) {
        return object;
      }
      path = castPath(path, object);

      var index = -1,
          length = path.length,
          lastIndex = length - 1,
          nested = object;

      while (nested != null && ++index < length) {
        var key = toKey(path[index]),
            newValue = value;

        if (index != lastIndex) {
          var objValue = nested[key];
          newValue = customizer ? customizer(objValue, key, nested) : undefined;
          if (newValue === undefined) {
            newValue = isObject(objValue)
              ? objValue
              : (isIndex(path[index + 1]) ? [] : {});
          }
        }
        assignValue(nested, key, newValue);
        nested = nested[key];
      }
      return object;
    }

    /**
     * The base implementation of `setData` without support for hot loop shorting.
     *
     * @private
     * @param {Function} func The function to associate metadata with.
     * @param {*} data The metadata.
     * @returns {Function} Returns `func`.
     */
    var baseSetData = !metaMap ? identity : function(func, data) {
      metaMap.set(func, data);
      return func;
    };

    /**
     * The base implementation of `setToString` without support for hot loop shorting.
     *
     * @private
     * @param {Function} func The function to modify.
     * @param {Function} string The `toString` result.
     * @returns {Function} Returns `func`.
     */
    var baseSetToString = !defineProperty ? identity : function(func, string) {
      return defineProperty(func, 'toString', {
        'configurable': true,
        'enumerable': false,
        'value': constant(string),
        'writable': true
      });
    };

    /**
     * The base implementation of `_.shuffle`.
     *
     * @private
     * @param {Array|Object} collection The collection to shuffle.
     * @returns {Array} Returns the new shuffled array.
     */
    function baseShuffle(collection) {
      return shuffleSelf(values(collection));
    }

    /**
     * The base implementation of `_.slice` without an iteratee call guard.
     *
     * @private
     * @param {Array} array The array to slice.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the slice of `array`.
     */
    function baseSlice(array, start, end) {
      var index = -1,
          length = array.length;

      if (start < 0) {
        start = -start > length ? 0 : (length + start);
      }
      end = end > length ? length : end;
      if (end < 0) {
        end += length;
      }
      length = start > end ? 0 : ((end - start) >>> 0);
      start >>>= 0;

      var result = Array(length);
      while (++index < length) {
        result[index] = array[index + start];
      }
      return result;
    }

    /**
     * The base implementation of `_.some` without support for iteratee shorthands.
     *
     * @private
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} predicate The function invoked per iteration.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     */
    function baseSome(collection, predicate) {
      var result;

      baseEach(collection, function(value, index, collection) {
        result = predicate(value, index, collection);
        return !result;
      });
      return !!result;
    }

    /**
     * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
     * performs a binary search of `array` to determine the index at which `value`
     * should be inserted into `array` in order to maintain its sort order.
     *
     * @private
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {boolean} [retHighest] Specify returning the highest qualified index.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     */
    function baseSortedIndex(array, value, retHighest) {
      var low = 0,
          high = array == null ? low : array.length;

      if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
        while (low < high) {
          var mid = (low + high) >>> 1,
              computed = array[mid];

          if (computed !== null && !isSymbol(computed) &&
              (retHighest ? (computed <= value) : (computed < value))) {
            low = mid + 1;
          } else {
            high = mid;
          }
        }
        return high;
      }
      return baseSortedIndexBy(array, value, identity, retHighest);
    }

    /**
     * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
     * which invokes `iteratee` for `value` and each element of `array` to compute
     * their sort ranking. The iteratee is invoked with one argument; (value).
     *
     * @private
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function} iteratee The iteratee invoked per element.
     * @param {boolean} [retHighest] Specify returning the highest qualified index.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     */
    function baseSortedIndexBy(array, value, iteratee, retHighest) {
      value = iteratee(value);

      var low = 0,
          high = array == null ? 0 : array.length,
          valIsNaN = value !== value,
          valIsNull = value === null,
          valIsSymbol = isSymbol(value),
          valIsUndefined = value === undefined;

      while (low < high) {
        var mid = nativeFloor((low + high) / 2),
            computed = iteratee(array[mid]),
            othIsDefined = computed !== undefined,
            othIsNull = computed === null,
            othIsReflexive = computed === computed,
            othIsSymbol = isSymbol(computed);

        if (valIsNaN) {
          var setLow = retHighest || othIsReflexive;
        } else if (valIsUndefined) {
          setLow = othIsReflexive && (retHighest || othIsDefined);
        } else if (valIsNull) {
          setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
        } else if (valIsSymbol) {
          setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
        } else if (othIsNull || othIsSymbol) {
          setLow = false;
        } else {
          setLow = retHighest ? (computed <= value) : (computed < value);
        }
        if (setLow) {
          low = mid + 1;
        } else {
          high = mid;
        }
      }
      return nativeMin(high, MAX_ARRAY_INDEX);
    }

    /**
     * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
     * support for iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     */
    function baseSortedUniq(array, iteratee) {
      var index = -1,
          length = array.length,
          resIndex = 0,
          result = [];

      while (++index < length) {
        var value = array[index],
            computed = iteratee ? iteratee(value) : value;

        if (!index || !eq(computed, seen)) {
          var seen = computed;
          result[resIndex++] = value === 0 ? 0 : value;
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.toNumber` which doesn't ensure correct
     * conversions of binary, hexadecimal, or octal string values.
     *
     * @private
     * @param {*} value The value to process.
     * @returns {number} Returns the number.
     */
    function baseToNumber(value) {
      if (typeof value == 'number') {
        return value;
      }
      if (isSymbol(value)) {
        return NAN;
      }
      return +value;
    }

    /**
     * The base implementation of `_.toString` which doesn't convert nullish
     * values to empty strings.
     *
     * @private
     * @param {*} value The value to process.
     * @returns {string} Returns the string.
     */
    function baseToString(value) {
      // Exit early for strings to avoid a performance hit in some environments.
      if (typeof value == 'string') {
        return value;
      }
      if (isArray(value)) {
        // Recursively convert values (susceptible to call stack limits).
        return arrayMap(value, baseToString) + '';
      }
      if (isSymbol(value)) {
        return symbolToString ? symbolToString.call(value) : '';
      }
      var result = (value + '');
      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
    }

    /**
     * The base implementation of `_.uniqBy` without support for iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     */
    function baseUniq(array, iteratee, comparator) {
      var index = -1,
          includes = arrayIncludes,
          length = array.length,
          isCommon = true,
          result = [],
          seen = result;

      if (comparator) {
        isCommon = false;
        includes = arrayIncludesWith;
      }
      else if (length >= LARGE_ARRAY_SIZE) {
        var set = iteratee ? null : createSet(array);
        if (set) {
          return setToArray(set);
        }
        isCommon = false;
        includes = cacheHas;
        seen = new SetCache;
      }
      else {
        seen = iteratee ? [] : result;
      }
      outer:
      while (++index < length) {
        var value = array[index],
            computed = iteratee ? iteratee(value) : value;

        value = (comparator || value !== 0) ? value : 0;
        if (isCommon && computed === computed) {
          var seenIndex = seen.length;
          while (seenIndex--) {
            if (seen[seenIndex] === computed) {
              continue outer;
            }
          }
          if (iteratee) {
            seen.push(computed);
          }
          result.push(value);
        }
        else if (!includes(seen, computed, comparator)) {
          if (seen !== result) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.unset`.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {Array|string} path The property path to unset.
     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
     */
    function baseUnset(object, path) {
      path = castPath(path, object);
      object = parent(object, path);
      return object == null || delete object[toKey(last(path))];
    }

    /**
     * The base implementation of `_.update`.
     *
     * @private
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to update.
     * @param {Function} updater The function to produce the updated value.
     * @param {Function} [customizer] The function to customize path creation.
     * @returns {Object} Returns `object`.
     */
    function baseUpdate(object, path, updater, customizer) {
      return baseSet(object, path, updater(baseGet(object, path)), customizer);
    }

    /**
     * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
     * without support for iteratee shorthands.
     *
     * @private
     * @param {Array} array The array to query.
     * @param {Function} predicate The function invoked per iteration.
     * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Array} Returns the slice of `array`.
     */
    function baseWhile(array, predicate, isDrop, fromRight) {
      var length = array.length,
          index = fromRight ? length : -1;

      while ((fromRight ? index-- : ++index < length) &&
        predicate(array[index], index, array)) {}

      return isDrop
        ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
        : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
    }

    /**
     * The base implementation of `wrapperValue` which returns the result of
     * performing a sequence of actions on the unwrapped `value`, where each
     * successive action is supplied the return value of the previous.
     *
     * @private
     * @param {*} value The unwrapped value.
     * @param {Array} actions Actions to perform to resolve the unwrapped value.
     * @returns {*} Returns the resolved value.
     */
    function baseWrapperValue(value, actions) {
      var result = value;
      if (result instanceof LazyWrapper) {
        result = result.value();
      }
      return arrayReduce(actions, function(result, action) {
        return action.func.apply(action.thisArg, arrayPush([result], action.args));
      }, result);
    }

    /**
     * The base implementation of methods like `_.xor`, without support for
     * iteratee shorthands, that accepts an array of arrays to inspect.
     *
     * @private
     * @param {Array} arrays The arrays to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of values.
     */
    function baseXor(arrays, iteratee, comparator) {
      var length = arrays.length;
      if (length < 2) {
        return length ? baseUniq(arrays[0]) : [];
      }
      var index = -1,
          result = Array(length);

      while (++index < length) {
        var array = arrays[index],
            othIndex = -1;

        while (++othIndex < length) {
          if (othIndex != index) {
            result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
          }
        }
      }
      return baseUniq(baseFlatten(result, 1), iteratee, comparator);
    }

    /**
     * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
     *
     * @private
     * @param {Array} props The property identifiers.
     * @param {Array} values The property values.
     * @param {Function} assignFunc The function to assign values.
     * @returns {Object} Returns the new object.
     */
    function baseZipObject(props, values, assignFunc) {
      var index = -1,
          length = props.length,
          valsLength = values.length,
          result = {};

      while (++index < length) {
        var value = index < valsLength ? values[index] : undefined;
        assignFunc(result, props[index], value);
      }
      return result;
    }

    /**
     * Casts `value` to an empty array if it's not an array like object.
     *
     * @private
     * @param {*} value The value to inspect.
     * @returns {Array|Object} Returns the cast array-like object.
     */
    function castArrayLikeObject(value) {
      return isArrayLikeObject(value) ? value : [];
    }

    /**
     * Casts `value` to `identity` if it's not a function.
     *
     * @private
     * @param {*} value The value to inspect.
     * @returns {Function} Returns cast function.
     */
    function castFunction(value) {
      return typeof value == 'function' ? value : identity;
    }

    /**
     * Casts `value` to a path array if it's not one.
     *
     * @private
     * @param {*} value The value to inspect.
     * @param {Object} [object] The object to query keys on.
     * @returns {Array} Returns the cast property path array.
     */
    function castPath(value, object) {
      if (isArray(value)) {
        return value;
      }
      return isKey(value, object) ? [value] : stringToPath(toString(value));
    }

    /**
     * A `baseRest` alias which can be replaced with `identity` by module
     * replacement plugins.
     *
     * @private
     * @type {Function}
     * @param {Function} func The function to apply a rest parameter to.
     * @returns {Function} Returns the new function.
     */
    var castRest = baseRest;

    /**
     * Casts `array` to a slice if it's needed.
     *
     * @private
     * @param {Array} array The array to inspect.
     * @param {number} start The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the cast slice.
     */
    function castSlice(array, start, end) {
      var length = array.length;
      end = end === undefined ? length : end;
      return (!start && end >= length) ? array : baseSlice(array, start, end);
    }

    /**
     * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
     *
     * @private
     * @param {number|Object} id The timer id or timeout object of the timer to clear.
     */
    var clearTimeout = ctxClearTimeout || function(id) {
      return root.clearTimeout(id);
    };

    /**
     * Creates a clone of  `buffer`.
     *
     * @private
     * @param {Buffer} buffer The buffer to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Buffer} Returns the cloned buffer.
     */
    function cloneBuffer(buffer, isDeep) {
      if (isDeep) {
        return buffer.slice();
      }
      var length = buffer.length,
          result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);

      buffer.copy(result);
      return result;
    }

    /**
     * Creates a clone of `arrayBuffer`.
     *
     * @private
     * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
     * @returns {ArrayBuffer} Returns the cloned array buffer.
     */
    function cloneArrayBuffer(arrayBuffer) {
      var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
      new Uint8Array(result).set(new Uint8Array(arrayBuffer));
      return result;
    }

    /**
     * Creates a clone of `dataView`.
     *
     * @private
     * @param {Object} dataView The data view to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the cloned data view.
     */
    function cloneDataView(dataView, isDeep) {
      var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
      return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
    }

    /**
     * Creates a clone of `map`.
     *
     * @private
     * @param {Object} map The map to clone.
     * @param {Function} cloneFunc The function to clone values.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the cloned map.
     */
    function cloneMap(map, isDeep, cloneFunc) {
      var array = isDeep ? cloneFunc(mapToArray(map), CLONE_DEEP_FLAG) : mapToArray(map);
      return arrayReduce(array, addMapEntry, new map.constructor);
    }

    /**
     * Creates a clone of `regexp`.
     *
     * @private
     * @param {Object} regexp The regexp to clone.
     * @returns {Object} Returns the cloned regexp.
     */
    function cloneRegExp(regexp) {
      var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
      result.lastIndex = regexp.lastIndex;
      return result;
    }

    /**
     * Creates a clone of `set`.
     *
     * @private
     * @param {Object} set The set to clone.
     * @param {Function} cloneFunc The function to clone values.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the cloned set.
     */
    function cloneSet(set, isDeep, cloneFunc) {
      var array = isDeep ? cloneFunc(setToArray(set), CLONE_DEEP_FLAG) : setToArray(set);
      return arrayReduce(array, addSetEntry, new set.constructor);
    }

    /**
     * Creates a clone of the `symbol` object.
     *
     * @private
     * @param {Object} symbol The symbol object to clone.
     * @returns {Object} Returns the cloned symbol object.
     */
    function cloneSymbol(symbol) {
      return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
    }

    /**
     * Creates a clone of `typedArray`.
     *
     * @private
     * @param {Object} typedArray The typed array to clone.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the cloned typed array.
     */
    function cloneTypedArray(typedArray, isDeep) {
      var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
      return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
    }

    /**
     * Compares values to sort them in ascending order.
     *
     * @private
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {number} Returns the sort order indicator for `value`.
     */
    function compareAscending(value, other) {
      if (value !== other) {
        var valIsDefined = value !== undefined,
            valIsNull = value === null,
            valIsReflexive = value === value,
            valIsSymbol = isSymbol(value);

        var othIsDefined = other !== undefined,
            othIsNull = other === null,
            othIsReflexive = other === other,
            othIsSymbol = isSymbol(other);

        if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
            (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
            (valIsNull && othIsDefined && othIsReflexive) ||
            (!valIsDefined && othIsReflexive) ||
            !valIsReflexive) {
          return 1;
        }
        if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
            (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
            (othIsNull && valIsDefined && valIsReflexive) ||
            (!othIsDefined && valIsReflexive) ||
            !othIsReflexive) {
          return -1;
        }
      }
      return 0;
    }

    /**
     * Used by `_.orderBy` to compare multiple properties of a value to another
     * and stable sort them.
     *
     * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
     * specify an order of "desc" for descending or "asc" for ascending sort order
     * of corresponding values.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {boolean[]|string[]} orders The order to sort by for each property.
     * @returns {number} Returns the sort order indicator for `object`.
     */
    function compareMultiple(object, other, orders) {
      var index = -1,
          objCriteria = object.criteria,
          othCriteria = other.criteria,
          length = objCriteria.length,
          ordersLength = orders.length;

      while (++index < length) {
        var result = compareAscending(objCriteria[index], othCriteria[index]);
        if (result) {
          if (index >= ordersLength) {
            return result;
          }
          var order = orders[index];
          return result * (order == 'desc' ? -1 : 1);
        }
      }
      // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
      // that causes it, under certain circumstances, to provide the same value for
      // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
      // for more details.
      //
      // This also ensures a stable sort in V8 and other engines.
      // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
      return object.index - other.index;
    }

    /**
     * Creates an array that is the composition of partially applied arguments,
     * placeholders, and provided arguments into a single array of arguments.
     *
     * @private
     * @param {Array} args The provided arguments.
     * @param {Array} partials The arguments to prepend to those provided.
     * @param {Array} holders The `partials` placeholder indexes.
     * @params {boolean} [isCurried] Specify composing for a curried function.
     * @returns {Array} Returns the new array of composed arguments.
     */
    function composeArgs(args, partials, holders, isCurried) {
      var argsIndex = -1,
          argsLength = args.length,
          holdersLength = holders.length,
          leftIndex = -1,
          leftLength = partials.length,
          rangeLength = nativeMax(argsLength - holdersLength, 0),
          result = Array(leftLength + rangeLength),
          isUncurried = !isCurried;

      while (++leftIndex < leftLength) {
        result[leftIndex] = partials[leftIndex];
      }
      while (++argsIndex < holdersLength) {
        if (isUncurried || argsIndex < argsLength) {
          result[holders[argsIndex]] = args[argsIndex];
        }
      }
      while (rangeLength--) {
        result[leftIndex++] = args[argsIndex++];
      }
      return result;
    }

    /**
     * This function is like `composeArgs` except that the arguments composition
     * is tailored for `_.partialRight`.
     *
     * @private
     * @param {Array} args The provided arguments.
     * @param {Array} partials The arguments to append to those provided.
     * @param {Array} holders The `partials` placeholder indexes.
     * @params {boolean} [isCurried] Specify composing for a curried function.
     * @returns {Array} Returns the new array of composed arguments.
     */
    function composeArgsRight(args, partials, holders, isCurried) {
      var argsIndex = -1,
          argsLength = args.length,
          holdersIndex = -1,
          holdersLength = holders.length,
          rightIndex = -1,
          rightLength = partials.length,
          rangeLength = nativeMax(argsLength - holdersLength, 0),
          result = Array(rangeLength + rightLength),
          isUncurried = !isCurried;

      while (++argsIndex < rangeLength) {
        result[argsIndex] = args[argsIndex];
      }
      var offset = argsIndex;
      while (++rightIndex < rightLength) {
        result[offset + rightIndex] = partials[rightIndex];
      }
      while (++holdersIndex < holdersLength) {
        if (isUncurried || argsIndex < argsLength) {
          result[offset + holders[holdersIndex]] = args[argsIndex++];
        }
      }
      return result;
    }

    /**
     * Copies the values of `source` to `array`.
     *
     * @private
     * @param {Array} source The array to copy values from.
     * @param {Array} [array=[]] The array to copy values to.
     * @returns {Array} Returns `array`.
     */
    function copyArray(source, array) {
      var index = -1,
          length = source.length;

      array || (array = Array(length));
      while (++index < length) {
        array[index] = source[index];
      }
      return array;
    }

    /**
     * Copies properties of `source` to `object`.
     *
     * @private
     * @param {Object} source The object to copy properties from.
     * @param {Array} props The property identifiers to copy.
     * @param {Object} [object={}] The object to copy properties to.
     * @param {Function} [customizer] The function to customize copied values.
     * @returns {Object} Returns `object`.
     */
    function copyObject(source, props, object, customizer) {
      var isNew = !object;
      object || (object = {});

      var index = -1,
          length = props.length;

      while (++index < length) {
        var key = props[index];

        var newValue = customizer
          ? customizer(object[key], source[key], key, object, source)
          : undefined;

        if (newValue === undefined) {
          newValue = source[key];
        }
        if (isNew) {
          baseAssignValue(object, key, newValue);
        } else {
          assignValue(object, key, newValue);
        }
      }
      return object;
    }

    /**
     * Copies own symbols of `source` to `object`.
     *
     * @private
     * @param {Object} source The object to copy symbols from.
     * @param {Object} [object={}] The object to copy symbols to.
     * @returns {Object} Returns `object`.
     */
    function copySymbols(source, object) {
      return copyObject(source, getSymbols(source), object);
    }

    /**
     * Copies own and inherited symbols of `source` to `object`.
     *
     * @private
     * @param {Object} source The object to copy symbols from.
     * @param {Object} [object={}] The object to copy symbols to.
     * @returns {Object} Returns `object`.
     */
    function copySymbolsIn(source, object) {
      return copyObject(source, getSymbolsIn(source), object);
    }

    /**
     * Creates a function like `_.groupBy`.
     *
     * @private
     * @param {Function} setter The function to set accumulator values.
     * @param {Function} [initializer] The accumulator object initializer.
     * @returns {Function} Returns the new aggregator function.
     */
    function createAggregator(setter, initializer) {
      return function(collection, iteratee) {
        var func = isArray(collection) ? arrayAggregator : baseAggregator,
            accumulator = initializer ? initializer() : {};

        return func(collection, setter, getIteratee(iteratee, 2), accumulator);
      };
    }

    /**
     * Creates a function like `_.assign`.
     *
     * @private
     * @param {Function} assigner The function to assign values.
     * @returns {Function} Returns the new assigner function.
     */
    function createAssigner(assigner) {
      return baseRest(function(object, sources) {
        var index = -1,
            length = sources.length,
            customizer = length > 1 ? sources[length - 1] : undefined,
            guard = length > 2 ? sources[2] : undefined;

        customizer = (assigner.length > 3 && typeof customizer == 'function')
          ? (length--, customizer)
          : undefined;

        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
          customizer = length < 3 ? undefined : customizer;
          length = 1;
        }
        object = Object(object);
        while (++index < length) {
          var source = sources[index];
          if (source) {
            assigner(object, source, index, customizer);
          }
        }
        return object;
      });
    }

    /**
     * Creates a `baseEach` or `baseEachRight` function.
     *
     * @private
     * @param {Function} eachFunc The function to iterate over a collection.
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new base function.
     */
    function createBaseEach(eachFunc, fromRight) {
      return function(collection, iteratee) {
        if (collection == null) {
          return collection;
        }
        if (!isArrayLike(collection)) {
          return eachFunc(collection, iteratee);
        }
        var length = collection.length,
            index = fromRight ? length : -1,
            iterable = Object(collection);

        while ((fromRight ? index-- : ++index < length)) {
          if (iteratee(iterable[index], index, iterable) === false) {
            break;
          }
        }
        return collection;
      };
    }

    /**
     * Creates a base function for methods like `_.forIn` and `_.forOwn`.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new base function.
     */
    function createBaseFor(fromRight) {
      return function(object, iteratee, keysFunc) {
        var index = -1,
            iterable = Object(object),
            props = keysFunc(object),
            length = props.length;

        while (length--) {
          var key = props[fromRight ? length : ++index];
          if (iteratee(iterable[key], key, iterable) === false) {
            break;
          }
        }
        return object;
      };
    }

    /**
     * Creates a function that wraps `func` to invoke it with the optional `this`
     * binding of `thisArg`.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createBind(func, bitmask, thisArg) {
      var isBind = bitmask & WRAP_BIND_FLAG,
          Ctor = createCtor(func);

      function wrapper() {
        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
        return fn.apply(isBind ? thisArg : this, arguments);
      }
      return wrapper;
    }

    /**
     * Creates a function like `_.lowerFirst`.
     *
     * @private
     * @param {string} methodName The name of the `String` case method to use.
     * @returns {Function} Returns the new case function.
     */
    function createCaseFirst(methodName) {
      return function(string) {
        string = toString(string);

        var strSymbols = hasUnicode(string)
          ? stringToArray(string)
          : undefined;

        var chr = strSymbols
          ? strSymbols[0]
          : string.charAt(0);

        var trailing = strSymbols
          ? castSlice(strSymbols, 1).join('')
          : string.slice(1);

        return chr[methodName]() + trailing;
      };
    }

    /**
     * Creates a function like `_.camelCase`.
     *
     * @private
     * @param {Function} callback The function to combine each word.
     * @returns {Function} Returns the new compounder function.
     */
    function createCompounder(callback) {
      return function(string) {
        return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
      };
    }

    /**
     * Creates a function that produces an instance of `Ctor` regardless of
     * whether it was invoked as part of a `new` expression or by `call` or `apply`.
     *
     * @private
     * @param {Function} Ctor The constructor to wrap.
     * @returns {Function} Returns the new wrapped function.
     */
    function createCtor(Ctor) {
      return function() {
        // Use a `switch` statement to work with class constructors. See
        // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
        // for more details.
        var args = arguments;
        switch (args.length) {
          case 0: return new Ctor;
          case 1: return new Ctor(args[0]);
          case 2: return new Ctor(args[0], args[1]);
          case 3: return new Ctor(args[0], args[1], args[2]);
          case 4: return new Ctor(args[0], args[1], args[2], args[3]);
          case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
          case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
          case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
        }
        var thisBinding = baseCreate(Ctor.prototype),
            result = Ctor.apply(thisBinding, args);

        // Mimic the constructor's `return` behavior.
        // See https://es5.github.io/#x13.2.2 for more details.
        return isObject(result) ? result : thisBinding;
      };
    }

    /**
     * Creates a function that wraps `func` to enable currying.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {number} arity The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createCurry(func, bitmask, arity) {
      var Ctor = createCtor(func);

      function wrapper() {
        var length = arguments.length,
            args = Array(length),
            index = length,
            placeholder = getHolder(wrapper);

        while (index--) {
          args[index] = arguments[index];
        }
        var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
          ? []
          : replaceHolders(args, placeholder);

        length -= holders.length;
        if (length < arity) {
          return createRecurry(
            func, bitmask, createHybrid, wrapper.placeholder, undefined,
            args, holders, undefined, undefined, arity - length);
        }
        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
        return apply(fn, this, args);
      }
      return wrapper;
    }

    /**
     * Creates a `_.find` or `_.findLast` function.
     *
     * @private
     * @param {Function} findIndexFunc The function to find the collection index.
     * @returns {Function} Returns the new find function.
     */
    function createFind(findIndexFunc) {
      return function(collection, predicate, fromIndex) {
        var iterable = Object(collection);
        if (!isArrayLike(collection)) {
          var iteratee = getIteratee(predicate, 3);
          collection = keys(collection);
          predicate = function(key) { return iteratee(iterable[key], key, iterable); };
        }
        var index = findIndexFunc(collection, predicate, fromIndex);
        return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
      };
    }

    /**
     * Creates a `_.flow` or `_.flowRight` function.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new flow function.
     */
    function createFlow(fromRight) {
      return flatRest(function(funcs) {
        var length = funcs.length,
            index = length,
            prereq = LodashWrapper.prototype.thru;

        if (fromRight) {
          funcs.reverse();
        }
        while (index--) {
          var func = funcs[index];
          if (typeof func != 'function') {
            throw new TypeError(FUNC_ERROR_TEXT);
          }
          if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
            var wrapper = new LodashWrapper([], true);
          }
        }
        index = wrapper ? index : length;
        while (++index < length) {
          func = funcs[index];

          var funcName = getFuncName(func),
              data = funcName == 'wrapper' ? getData(func) : undefined;

          if (data && isLaziable(data[0]) &&
                data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
                !data[4].length && data[9] == 1
              ) {
            wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
          } else {
            wrapper = (func.length == 1 && isLaziable(func))
              ? wrapper[funcName]()
              : wrapper.thru(func);
          }
        }
        return function() {
          var args = arguments,
              value = args[0];

          if (wrapper && args.length == 1 && isArray(value)) {
            return wrapper.plant(value).value();
          }
          var index = 0,
              result = length ? funcs[index].apply(this, args) : value;

          while (++index < length) {
            result = funcs[index].call(this, result);
          }
          return result;
        };
      });
    }

    /**
     * Creates a function that wraps `func` to invoke it with optional `this`
     * binding of `thisArg`, partial application, and currying.
     *
     * @private
     * @param {Function|string} func The function or method name to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to prepend to those provided to
     *  the new function.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [partialsRight] The arguments to append to those provided
     *  to the new function.
     * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
      var isAry = bitmask & WRAP_ARY_FLAG,
          isBind = bitmask & WRAP_BIND_FLAG,
          isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
          isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
          isFlip = bitmask & WRAP_FLIP_FLAG,
          Ctor = isBindKey ? undefined : createCtor(func);

      function wrapper() {
        var length = arguments.length,
            args = Array(length),
            index = length;

        while (index--) {
          args[index] = arguments[index];
        }
        if (isCurried) {
          var placeholder = getHolder(wrapper),
              holdersCount = countHolders(args, placeholder);
        }
        if (partials) {
          args = composeArgs(args, partials, holders, isCurried);
        }
        if (partialsRight) {
          args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
        }
        length -= holdersCount;
        if (isCurried && length < arity) {
          var newHolders = replaceHolders(args, placeholder);
          return createRecurry(
            func, bitmask, createHybrid, wrapper.placeholder, thisArg,
            args, newHolders, argPos, ary, arity - length
          );
        }
        var thisBinding = isBind ? thisArg : this,
            fn = isBindKey ? thisBinding[func] : func;

        length = args.length;
        if (argPos) {
          args = reorder(args, argPos);
        } else if (isFlip && length > 1) {
          args.reverse();
        }
        if (isAry && ary < length) {
          args.length = ary;
        }
        if (this && this !== root && this instanceof wrapper) {
          fn = Ctor || createCtor(fn);
        }
        return fn.apply(thisBinding, args);
      }
      return wrapper;
    }

    /**
     * Creates a function like `_.invertBy`.
     *
     * @private
     * @param {Function} setter The function to set accumulator values.
     * @param {Function} toIteratee The function to resolve iteratees.
     * @returns {Function} Returns the new inverter function.
     */
    function createInverter(setter, toIteratee) {
      return function(object, iteratee) {
        return baseInverter(object, setter, toIteratee(iteratee), {});
      };
    }

    /**
     * Creates a function that performs a mathematical operation on two values.
     *
     * @private
     * @param {Function} operator The function to perform the operation.
     * @param {number} [defaultValue] The value used for `undefined` arguments.
     * @returns {Function} Returns the new mathematical operation function.
     */
    function createMathOperation(operator, defaultValue) {
      return function(value, other) {
        var result;
        if (value === undefined && other === undefined) {
          return defaultValue;
        }
        if (value !== undefined) {
          result = value;
        }
        if (other !== undefined) {
          if (result === undefined) {
            return other;
          }
          if (typeof value == 'string' || typeof other == 'string') {
            value = baseToString(value);
            other = baseToString(other);
          } else {
            value = baseToNumber(value);
            other = baseToNumber(other);
          }
          result = operator(value, other);
        }
        return result;
      };
    }

    /**
     * Creates a function like `_.over`.
     *
     * @private
     * @param {Function} arrayFunc The function to iterate over iteratees.
     * @returns {Function} Returns the new over function.
     */
    function createOver(arrayFunc) {
      return flatRest(function(iteratees) {
        iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
        return baseRest(function(args) {
          var thisArg = this;
          return arrayFunc(iteratees, function(iteratee) {
            return apply(iteratee, thisArg, args);
          });
        });
      });
    }

    /**
     * Creates the padding for `string` based on `length`. The `chars` string
     * is truncated if the number of characters exceeds `length`.
     *
     * @private
     * @param {number} length The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padding for `string`.
     */
    function createPadding(length, chars) {
      chars = chars === undefined ? ' ' : baseToString(chars);

      var charsLength = chars.length;
      if (charsLength < 2) {
        return charsLength ? baseRepeat(chars, length) : chars;
      }
      var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
      return hasUnicode(chars)
        ? castSlice(stringToArray(result), 0, length).join('')
        : result.slice(0, length);
    }

    /**
     * Creates a function that wraps `func` to invoke it with the `this` binding
     * of `thisArg` and `partials` prepended to the arguments it receives.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {Array} partials The arguments to prepend to those provided to
     *  the new function.
     * @returns {Function} Returns the new wrapped function.
     */
    function createPartial(func, bitmask, thisArg, partials) {
      var isBind = bitmask & WRAP_BIND_FLAG,
          Ctor = createCtor(func);

      function wrapper() {
        var argsIndex = -1,
            argsLength = arguments.length,
            leftIndex = -1,
            leftLength = partials.length,
            args = Array(leftLength + argsLength),
            fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;

        while (++leftIndex < leftLength) {
          args[leftIndex] = partials[leftIndex];
        }
        while (argsLength--) {
          args[leftIndex++] = arguments[++argsIndex];
        }
        return apply(fn, isBind ? thisArg : this, args);
      }
      return wrapper;
    }

    /**
     * Creates a `_.range` or `_.rangeRight` function.
     *
     * @private
     * @param {boolean} [fromRight] Specify iterating from right to left.
     * @returns {Function} Returns the new range function.
     */
    function createRange(fromRight) {
      return function(start, end, step) {
        if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
          end = step = undefined;
        }
        // Ensure the sign of `-0` is preserved.
        start = toFinite(start);
        if (end === undefined) {
          end = start;
          start = 0;
        } else {
          end = toFinite(end);
        }
        step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
        return baseRange(start, end, step, fromRight);
      };
    }

    /**
     * Creates a function that performs a relational operation on two values.
     *
     * @private
     * @param {Function} operator The function to perform the operation.
     * @returns {Function} Returns the new relational operation function.
     */
    function createRelationalOperation(operator) {
      return function(value, other) {
        if (!(typeof value == 'string' && typeof other == 'string')) {
          value = toNumber(value);
          other = toNumber(other);
        }
        return operator(value, other);
      };
    }

    /**
     * Creates a function that wraps `func` to continue currying.
     *
     * @private
     * @param {Function} func The function to wrap.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @param {Function} wrapFunc The function to create the `func` wrapper.
     * @param {*} placeholder The placeholder value.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to prepend to those provided to
     *  the new function.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
      var isCurry = bitmask & WRAP_CURRY_FLAG,
          newHolders = isCurry ? holders : undefined,
          newHoldersRight = isCurry ? undefined : holders,
          newPartials = isCurry ? partials : undefined,
          newPartialsRight = isCurry ? undefined : partials;

      bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
      bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);

      if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
        bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
      }
      var newData = [
        func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
        newHoldersRight, argPos, ary, arity
      ];

      var result = wrapFunc.apply(undefined, newData);
      if (isLaziable(func)) {
        setData(result, newData);
      }
      result.placeholder = placeholder;
      return setWrapToString(result, func, bitmask);
    }

    /**
     * Creates a function like `_.round`.
     *
     * @private
     * @param {string} methodName The name of the `Math` method to use when rounding.
     * @returns {Function} Returns the new round function.
     */
    function createRound(methodName) {
      var func = Math[methodName];
      return function(number, precision) {
        number = toNumber(number);
        precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
        if (precision) {
          // Shift with exponential notation to avoid floating-point issues.
          // See [MDN](https://mdn.io/round#Examples) for more details.
          var pair = (toString(number) + 'e').split('e'),
              value = func(pair[0] + 'e' + (+pair[1] + precision));

          pair = (toString(value) + 'e').split('e');
          return +(pair[0] + 'e' + (+pair[1] - precision));
        }
        return func(number);
      };
    }

    /**
     * Creates a set object of `values`.
     *
     * @private
     * @param {Array} values The values to add to the set.
     * @returns {Object} Returns the new set.
     */
    var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
      return new Set(values);
    };

    /**
     * Creates a `_.toPairs` or `_.toPairsIn` function.
     *
     * @private
     * @param {Function} keysFunc The function to get the keys of a given object.
     * @returns {Function} Returns the new pairs function.
     */
    function createToPairs(keysFunc) {
      return function(object) {
        var tag = getTag(object);
        if (tag == mapTag) {
          return mapToArray(object);
        }
        if (tag == setTag) {
          return setToPairs(object);
        }
        return baseToPairs(object, keysFunc(object));
      };
    }

    /**
     * Creates a function that either curries or invokes `func` with optional
     * `this` binding and partially applied arguments.
     *
     * @private
     * @param {Function|string} func The function or method name to wrap.
     * @param {number} bitmask The bitmask flags.
     *    1 - `_.bind`
     *    2 - `_.bindKey`
     *    4 - `_.curry` or `_.curryRight` of a bound function
     *    8 - `_.curry`
     *   16 - `_.curryRight`
     *   32 - `_.partial`
     *   64 - `_.partialRight`
     *  128 - `_.rearg`
     *  256 - `_.ary`
     *  512 - `_.flip`
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {Array} [partials] The arguments to be partially applied.
     * @param {Array} [holders] The `partials` placeholder indexes.
     * @param {Array} [argPos] The argument positions of the new function.
     * @param {number} [ary] The arity cap of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new wrapped function.
     */
    function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
      var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
      if (!isBindKey && typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      var length = partials ? partials.length : 0;
      if (!length) {
        bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
        partials = holders = undefined;
      }
      ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
      arity = arity === undefined ? arity : toInteger(arity);
      length -= holders ? holders.length : 0;

      if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
        var partialsRight = partials,
            holdersRight = holders;

        partials = holders = undefined;
      }
      var data = isBindKey ? undefined : getData(func);

      var newData = [
        func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
        argPos, ary, arity
      ];

      if (data) {
        mergeData(newData, data);
      }
      func = newData[0];
      bitmask = newData[1];
      thisArg = newData[2];
      partials = newData[3];
      holders = newData[4];
      arity = newData[9] = newData[9] === undefined
        ? (isBindKey ? 0 : func.length)
        : nativeMax(newData[9] - length, 0);

      if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
        bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
      }
      if (!bitmask || bitmask == WRAP_BIND_FLAG) {
        var result = createBind(func, bitmask, thisArg);
      } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
        result = createCurry(func, bitmask, arity);
      } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
        result = createPartial(func, bitmask, thisArg, partials);
      } else {
        result = createHybrid.apply(undefined, newData);
      }
      var setter = data ? baseSetData : setData;
      return setWrapToString(setter(result, newData), func, bitmask);
    }

    /**
     * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
     * of source objects to the destination object for all destination properties
     * that resolve to `undefined`.
     *
     * @private
     * @param {*} objValue The destination value.
     * @param {*} srcValue The source value.
     * @param {string} key The key of the property to assign.
     * @param {Object} object The parent object of `objValue`.
     * @returns {*} Returns the value to assign.
     */
    function customDefaultsAssignIn(objValue, srcValue, key, object) {
      if (objValue === undefined ||
          (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
        return srcValue;
      }
      return objValue;
    }

    /**
     * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
     * objects into destination objects that are passed thru.
     *
     * @private
     * @param {*} objValue The destination value.
     * @param {*} srcValue The source value.
     * @param {string} key The key of the property to merge.
     * @param {Object} object The parent object of `objValue`.
     * @param {Object} source The parent object of `srcValue`.
     * @param {Object} [stack] Tracks traversed source values and their merged
     *  counterparts.
     * @returns {*} Returns the value to assign.
     */
    function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
      if (isObject(objValue) && isObject(srcValue)) {
        // Recursively merge objects and arrays (susceptible to call stack limits).
        stack.set(srcValue, objValue);
        baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
        stack['delete'](srcValue);
      }
      return objValue;
    }

    /**
     * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
     * objects.
     *
     * @private
     * @param {*} value The value to inspect.
     * @param {string} key The key of the property to inspect.
     * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
     */
    function customOmitClone(value) {
      return isPlainObject(value) ? undefined : value;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for arrays with support for
     * partial deep comparisons.
     *
     * @private
     * @param {Array} array The array to compare.
     * @param {Array} other The other array to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} stack Tracks traversed `array` and `other` objects.
     * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
     */
    function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
          arrLength = array.length,
          othLength = other.length;

      if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
        return false;
      }
      // Assume cyclic values are equal.
      var stacked = stack.get(array);
      if (stacked && stack.get(other)) {
        return stacked == other;
      }
      var index = -1,
          result = true,
          seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;

      stack.set(array, other);
      stack.set(other, array);

      // Ignore non-index properties.
      while (++index < arrLength) {
        var arrValue = array[index],
            othValue = other[index];

        if (customizer) {
          var compared = isPartial
            ? customizer(othValue, arrValue, index, other, array, stack)
            : customizer(arrValue, othValue, index, array, other, stack);
        }
        if (compared !== undefined) {
          if (compared) {
            continue;
          }
          result = false;
          break;
        }
        // Recursively compare arrays (susceptible to call stack limits).
        if (seen) {
          if (!arraySome(other, function(othValue, othIndex) {
                if (!cacheHas(seen, othIndex) &&
                    (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
                  return seen.push(othIndex);
                }
              })) {
            result = false;
            break;
          }
        } else if (!(
              arrValue === othValue ||
                equalFunc(arrValue, othValue, bitmask, customizer, stack)
            )) {
          result = false;
          break;
        }
      }
      stack['delete'](array);
      stack['delete'](other);
      return result;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for comparing objects of
     * the same `toStringTag`.
     *
     * **Note:** This function only supports comparing values with tags of
     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {string} tag The `toStringTag` of the objects to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} stack Tracks traversed `object` and `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
      switch (tag) {
        case dataViewTag:
          if ((object.byteLength != other.byteLength) ||
              (object.byteOffset != other.byteOffset)) {
            return false;
          }
          object = object.buffer;
          other = other.buffer;

        case arrayBufferTag:
          if ((object.byteLength != other.byteLength) ||
              !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
            return false;
          }
          return true;

        case boolTag:
        case dateTag:
        case numberTag:
          // Coerce booleans to `1` or `0` and dates to milliseconds.
          // Invalid dates are coerced to `NaN`.
          return eq(+object, +other);

        case errorTag:
          return object.name == other.name && object.message == other.message;

        case regexpTag:
        case stringTag:
          // Coerce regexes to strings and treat strings, primitives and objects,
          // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
          // for more details.
          return object == (other + '');

        case mapTag:
          var convert = mapToArray;

        case setTag:
          var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
          convert || (convert = setToArray);

          if (object.size != other.size && !isPartial) {
            return false;
          }
          // Assume cyclic values are equal.
          var stacked = stack.get(object);
          if (stacked) {
            return stacked == other;
          }
          bitmask |= COMPARE_UNORDERED_FLAG;

          // Recursively compare objects (susceptible to call stack limits).
          stack.set(object, other);
          var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
          stack['delete'](object);
          return result;

        case symbolTag:
          if (symbolValueOf) {
            return symbolValueOf.call(object) == symbolValueOf.call(other);
          }
      }
      return false;
    }

    /**
     * A specialized version of `baseIsEqualDeep` for objects with support for
     * partial deep comparisons.
     *
     * @private
     * @param {Object} object The object to compare.
     * @param {Object} other The other object to compare.
     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
     * @param {Function} customizer The function to customize comparisons.
     * @param {Function} equalFunc The function to determine equivalents of values.
     * @param {Object} stack Tracks traversed `object` and `other` objects.
     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
     */
    function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
          objProps = getAllKeys(object),
          objLength = objProps.length,
          othProps = getAllKeys(other),
          othLength = othProps.length;

      if (objLength != othLength && !isPartial) {
        return false;
      }
      var index = objLength;
      while (index--) {
        var key = objProps[index];
        if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
          return false;
        }
      }
      // Assume cyclic values are equal.
      var stacked = stack.get(object);
      if (stacked && stack.get(other)) {
        return stacked == other;
      }
      var result = true;
      stack.set(object, other);
      stack.set(other, object);

      var skipCtor = isPartial;
      while (++index < objLength) {
        key = objProps[index];
        var objValue = object[key],
            othValue = other[key];

        if (customizer) {
          var compared = isPartial
            ? customizer(othValue, objValue, key, other, object, stack)
            : customizer(objValue, othValue, key, object, other, stack);
        }
        // Recursively compare objects (susceptible to call stack limits).
        if (!(compared === undefined
              ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
              : compared
            )) {
          result = false;
          break;
        }
        skipCtor || (skipCtor = key == 'constructor');
      }
      if (result && !skipCtor) {
        var objCtor = object.constructor,
            othCtor = other.constructor;

        // Non `Object` object instances with different constructors are not equal.
        if (objCtor != othCtor &&
            ('constructor' in object && 'constructor' in other) &&
            !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
              typeof othCtor == 'function' && othCtor instanceof othCtor)) {
          result = false;
        }
      }
      stack['delete'](object);
      stack['delete'](other);
      return result;
    }

    /**
     * A specialized version of `baseRest` which flattens the rest array.
     *
     * @private
     * @param {Function} func The function to apply a rest parameter to.
     * @returns {Function} Returns the new function.
     */
    function flatRest(func) {
      return setToString(overRest(func, undefined, flatten), func + '');
    }

    /**
     * Creates an array of own enumerable property names and symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names and symbols.
     */
    function getAllKeys(object) {
      return baseGetAllKeys(object, keys, getSymbols);
    }

    /**
     * Creates an array of own and inherited enumerable property names and
     * symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names and symbols.
     */
    function getAllKeysIn(object) {
      return baseGetAllKeys(object, keysIn, getSymbolsIn);
    }

    /**
     * Gets metadata for `func`.
     *
     * @private
     * @param {Function} func The function to query.
     * @returns {*} Returns the metadata for `func`.
     */
    var getData = !metaMap ? noop : function(func) {
      return metaMap.get(func);
    };

    /**
     * Gets the name of `func`.
     *
     * @private
     * @param {Function} func The function to query.
     * @returns {string} Returns the function name.
     */
    function getFuncName(func) {
      var result = (func.name + ''),
          array = realNames[result],
          length = hasOwnProperty.call(realNames, result) ? array.length : 0;

      while (length--) {
        var data = array[length],
            otherFunc = data.func;
        if (otherFunc == null || otherFunc == func) {
          return data.name;
        }
      }
      return result;
    }

    /**
     * Gets the argument placeholder value for `func`.
     *
     * @private
     * @param {Function} func The function to inspect.
     * @returns {*} Returns the placeholder value.
     */
    function getHolder(func) {
      var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
      return object.placeholder;
    }

    /**
     * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
     * this function returns the custom method, otherwise it returns `baseIteratee`.
     * If arguments are provided, the chosen function is invoked with them and
     * its result is returned.
     *
     * @private
     * @param {*} [value] The value to convert to an iteratee.
     * @param {number} [arity] The arity of the created iteratee.
     * @returns {Function} Returns the chosen function or its result.
     */
    function getIteratee() {
      var result = lodash.iteratee || iteratee;
      result = result === iteratee ? baseIteratee : result;
      return arguments.length ? result(arguments[0], arguments[1]) : result;
    }

    /**
     * Gets the data for `map`.
     *
     * @private
     * @param {Object} map The map to query.
     * @param {string} key The reference key.
     * @returns {*} Returns the map data.
     */
    function getMapData(map, key) {
      var data = map.__data__;
      return isKeyable(key)
        ? data[typeof key == 'string' ? 'string' : 'hash']
        : data.map;
    }

    /**
     * Gets the property names, values, and compare flags of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the match data of `object`.
     */
    function getMatchData(object) {
      var result = keys(object),
          length = result.length;

      while (length--) {
        var key = result[length],
            value = object[key];

        result[length] = [key, value, isStrictComparable(value)];
      }
      return result;
    }

    /**
     * Gets the native function at `key` of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {string} key The key of the method to get.
     * @returns {*} Returns the function if it's native, else `undefined`.
     */
    function getNative(object, key) {
      var value = getValue(object, key);
      return baseIsNative(value) ? value : undefined;
    }

    /**
     * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
     *
     * @private
     * @param {*} value The value to query.
     * @returns {string} Returns the raw `toStringTag`.
     */
    function getRawTag(value) {
      var isOwn = hasOwnProperty.call(value, symToStringTag),
          tag = value[symToStringTag];

      try {
        value[symToStringTag] = undefined;
        var unmasked = true;
      } catch (e) {}

      var result = nativeObjectToString.call(value);
      if (unmasked) {
        if (isOwn) {
          value[symToStringTag] = tag;
        } else {
          delete value[symToStringTag];
        }
      }
      return result;
    }

    /**
     * Creates an array of the own enumerable symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of symbols.
     */
    var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
      if (object == null) {
        return [];
      }
      object = Object(object);
      return arrayFilter(nativeGetSymbols(object), function(symbol) {
        return propertyIsEnumerable.call(object, symbol);
      });
    };

    /**
     * Creates an array of the own and inherited enumerable symbols of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of symbols.
     */
    var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
      var result = [];
      while (object) {
        arrayPush(result, getSymbols(object));
        object = getPrototype(object);
      }
      return result;
    };

    /**
     * Gets the `toStringTag` of `value`.
     *
     * @private
     * @param {*} value The value to query.
     * @returns {string} Returns the `toStringTag`.
     */
    var getTag = baseGetTag;

    // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
    if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
        (Map && getTag(new Map) != mapTag) ||
        (Promise && getTag(Promise.resolve()) != promiseTag) ||
        (Set && getTag(new Set) != setTag) ||
        (WeakMap && getTag(new WeakMap) != weakMapTag)) {
      getTag = function(value) {
        var result = baseGetTag(value),
            Ctor = result == objectTag ? value.constructor : undefined,
            ctorString = Ctor ? toSource(Ctor) : '';

        if (ctorString) {
          switch (ctorString) {
            case dataViewCtorString: return dataViewTag;
            case mapCtorString: return mapTag;
            case promiseCtorString: return promiseTag;
            case setCtorString: return setTag;
            case weakMapCtorString: return weakMapTag;
          }
        }
        return result;
      };
    }

    /**
     * Gets the view, applying any `transforms` to the `start` and `end` positions.
     *
     * @private
     * @param {number} start The start of the view.
     * @param {number} end The end of the view.
     * @param {Array} transforms The transformations to apply to the view.
     * @returns {Object} Returns an object containing the `start` and `end`
     *  positions of the view.
     */
    function getView(start, end, transforms) {
      var index = -1,
          length = transforms.length;

      while (++index < length) {
        var data = transforms[index],
            size = data.size;

        switch (data.type) {
          case 'drop':      start += size; break;
          case 'dropRight': end -= size; break;
          case 'take':      end = nativeMin(end, start + size); break;
          case 'takeRight': start = nativeMax(start, end - size); break;
        }
      }
      return { 'start': start, 'end': end };
    }

    /**
     * Extracts wrapper details from the `source` body comment.
     *
     * @private
     * @param {string} source The source to inspect.
     * @returns {Array} Returns the wrapper details.
     */
    function getWrapDetails(source) {
      var match = source.match(reWrapDetails);
      return match ? match[1].split(reSplitDetails) : [];
    }

    /**
     * Checks if `path` exists on `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array|string} path The path to check.
     * @param {Function} hasFunc The function to check properties.
     * @returns {boolean} Returns `true` if `path` exists, else `false`.
     */
    function hasPath(object, path, hasFunc) {
      path = castPath(path, object);

      var index = -1,
          length = path.length,
          result = false;

      while (++index < length) {
        var key = toKey(path[index]);
        if (!(result = object != null && hasFunc(object, key))) {
          break;
        }
        object = object[key];
      }
      if (result || ++index != length) {
        return result;
      }
      length = object == null ? 0 : object.length;
      return !!length && isLength(length) && isIndex(key, length) &&
        (isArray(object) || isArguments(object));
    }

    /**
     * Initializes an array clone.
     *
     * @private
     * @param {Array} array The array to clone.
     * @returns {Array} Returns the initialized clone.
     */
    function initCloneArray(array) {
      var length = array.length,
          result = array.constructor(length);

      // Add properties assigned by `RegExp#exec`.
      if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
        result.index = array.index;
        result.input = array.input;
      }
      return result;
    }

    /**
     * Initializes an object clone.
     *
     * @private
     * @param {Object} object The object to clone.
     * @returns {Object} Returns the initialized clone.
     */
    function initCloneObject(object) {
      return (typeof object.constructor == 'function' && !isPrototype(object))
        ? baseCreate(getPrototype(object))
        : {};
    }

    /**
     * Initializes an object clone based on its `toStringTag`.
     *
     * **Note:** This function only supports cloning values with tags of
     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
     *
     * @private
     * @param {Object} object The object to clone.
     * @param {string} tag The `toStringTag` of the object to clone.
     * @param {Function} cloneFunc The function to clone values.
     * @param {boolean} [isDeep] Specify a deep clone.
     * @returns {Object} Returns the initialized clone.
     */
    function initCloneByTag(object, tag, cloneFunc, isDeep) {
      var Ctor = object.constructor;
      switch (tag) {
        case arrayBufferTag:
          return cloneArrayBuffer(object);

        case boolTag:
        case dateTag:
          return new Ctor(+object);

        case dataViewTag:
          return cloneDataView(object, isDeep);

        case float32Tag: case float64Tag:
        case int8Tag: case int16Tag: case int32Tag:
        case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
          return cloneTypedArray(object, isDeep);

        case mapTag:
          return cloneMap(object, isDeep, cloneFunc);

        case numberTag:
        case stringTag:
          return new Ctor(object);

        case regexpTag:
          return cloneRegExp(object);

        case setTag:
          return cloneSet(object, isDeep, cloneFunc);

        case symbolTag:
          return cloneSymbol(object);
      }
    }

    /**
     * Inserts wrapper `details` in a comment at the top of the `source` body.
     *
     * @private
     * @param {string} source The source to modify.
     * @returns {Array} details The details to insert.
     * @returns {string} Returns the modified source.
     */
    function insertWrapDetails(source, details) {
      var length = details.length;
      if (!length) {
        return source;
      }
      var lastIndex = length - 1;
      details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
      details = details.join(length > 2 ? ', ' : ' ');
      return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
    }

    /**
     * Checks if `value` is a flattenable `arguments` object or array.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
     */
    function isFlattenable(value) {
      return isArray(value) || isArguments(value) ||
        !!(spreadableSymbol && value && value[spreadableSymbol]);
    }

    /**
     * Checks if `value` is a valid array-like index.
     *
     * @private
     * @param {*} value The value to check.
     * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
     * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
     */
    function isIndex(value, length) {
      length = length == null ? MAX_SAFE_INTEGER : length;
      return !!length &&
        (typeof value == 'number' || reIsUint.test(value)) &&
        (value > -1 && value % 1 == 0 && value < length);
    }

    /**
     * Checks if the given arguments are from an iteratee call.
     *
     * @private
     * @param {*} value The potential iteratee value argument.
     * @param {*} index The potential iteratee index or key argument.
     * @param {*} object The potential iteratee object argument.
     * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
     *  else `false`.
     */
    function isIterateeCall(value, index, object) {
      if (!isObject(object)) {
        return false;
      }
      var type = typeof index;
      if (type == 'number'
            ? (isArrayLike(object) && isIndex(index, object.length))
            : (type == 'string' && index in object)
          ) {
        return eq(object[index], value);
      }
      return false;
    }

    /**
     * Checks if `value` is a property name and not a property path.
     *
     * @private
     * @param {*} value The value to check.
     * @param {Object} [object] The object to query keys on.
     * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
     */
    function isKey(value, object) {
      if (isArray(value)) {
        return false;
      }
      var type = typeof value;
      if (type == 'number' || type == 'symbol' || type == 'boolean' ||
          value == null || isSymbol(value)) {
        return true;
      }
      return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
        (object != null && value in Object(object));
    }

    /**
     * Checks if `value` is suitable for use as unique object key.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
     */
    function isKeyable(value) {
      var type = typeof value;
      return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
        ? (value !== '__proto__')
        : (value === null);
    }

    /**
     * Checks if `func` has a lazy counterpart.
     *
     * @private
     * @param {Function} func The function to check.
     * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
     *  else `false`.
     */
    function isLaziable(func) {
      var funcName = getFuncName(func),
          other = lodash[funcName];

      if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
        return false;
      }
      if (func === other) {
        return true;
      }
      var data = getData(other);
      return !!data && func === data[0];
    }

    /**
     * Checks if `func` has its source masked.
     *
     * @private
     * @param {Function} func The function to check.
     * @returns {boolean} Returns `true` if `func` is masked, else `false`.
     */
    function isMasked(func) {
      return !!maskSrcKey && (maskSrcKey in func);
    }

    /**
     * Checks if `func` is capable of being masked.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
     */
    var isMaskable = coreJsData ? isFunction : stubFalse;

    /**
     * Checks if `value` is likely a prototype object.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
     */
    function isPrototype(value) {
      var Ctor = value && value.constructor,
          proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;

      return value === proto;
    }

    /**
     * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` if suitable for strict
     *  equality comparisons, else `false`.
     */
    function isStrictComparable(value) {
      return value === value && !isObject(value);
    }

    /**
     * A specialized version of `matchesProperty` for source values suitable
     * for strict equality comparisons, i.e. `===`.
     *
     * @private
     * @param {string} key The key of the property to get.
     * @param {*} srcValue The value to match.
     * @returns {Function} Returns the new spec function.
     */
    function matchesStrictComparable(key, srcValue) {
      return function(object) {
        if (object == null) {
          return false;
        }
        return object[key] === srcValue &&
          (srcValue !== undefined || (key in Object(object)));
      };
    }

    /**
     * A specialized version of `_.memoize` which clears the memoized function's
     * cache when it exceeds `MAX_MEMOIZE_SIZE`.
     *
     * @private
     * @param {Function} func The function to have its output memoized.
     * @returns {Function} Returns the new memoized function.
     */
    function memoizeCapped(func) {
      var result = memoize(func, function(key) {
        if (cache.size === MAX_MEMOIZE_SIZE) {
          cache.clear();
        }
        return key;
      });

      var cache = result.cache;
      return result;
    }

    /**
     * Merges the function metadata of `source` into `data`.
     *
     * Merging metadata reduces the number of wrappers used to invoke a function.
     * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
     * may be applied regardless of execution order. Methods like `_.ary` and
     * `_.rearg` modify function arguments, making the order in which they are
     * executed important, preventing the merging of metadata. However, we make
     * an exception for a safe combined case where curried functions have `_.ary`
     * and or `_.rearg` applied.
     *
     * @private
     * @param {Array} data The destination metadata.
     * @param {Array} source The source metadata.
     * @returns {Array} Returns `data`.
     */
    function mergeData(data, source) {
      var bitmask = data[1],
          srcBitmask = source[1],
          newBitmask = bitmask | srcBitmask,
          isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);

      var isCombo =
        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
        ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));

      // Exit early if metadata can't be merged.
      if (!(isCommon || isCombo)) {
        return data;
      }
      // Use source `thisArg` if available.
      if (srcBitmask & WRAP_BIND_FLAG) {
        data[2] = source[2];
        // Set when currying a bound function.
        newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
      }
      // Compose partial arguments.
      var value = source[3];
      if (value) {
        var partials = data[3];
        data[3] = partials ? composeArgs(partials, value, source[4]) : value;
        data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
      }
      // Compose partial right arguments.
      value = source[5];
      if (value) {
        partials = data[5];
        data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
        data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
      }
      // Use source `argPos` if available.
      value = source[7];
      if (value) {
        data[7] = value;
      }
      // Use source `ary` if it's smaller.
      if (srcBitmask & WRAP_ARY_FLAG) {
        data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
      }
      // Use source `arity` if one is not provided.
      if (data[9] == null) {
        data[9] = source[9];
      }
      // Use source `func` and merge bitmasks.
      data[0] = source[0];
      data[1] = newBitmask;

      return data;
    }

    /**
     * This function is like
     * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
     * except that it includes inherited enumerable properties.
     *
     * @private
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     */
    function nativeKeysIn(object) {
      var result = [];
      if (object != null) {
        for (var key in Object(object)) {
          result.push(key);
        }
      }
      return result;
    }

    /**
     * Converts `value` to a string using `Object.prototype.toString`.
     *
     * @private
     * @param {*} value The value to convert.
     * @returns {string} Returns the converted string.
     */
    function objectToString(value) {
      return nativeObjectToString.call(value);
    }

    /**
     * A specialized version of `baseRest` which transforms the rest array.
     *
     * @private
     * @param {Function} func The function to apply a rest parameter to.
     * @param {number} [start=func.length-1] The start position of the rest parameter.
     * @param {Function} transform The rest array transform.
     * @returns {Function} Returns the new function.
     */
    function overRest(func, start, transform) {
      start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
      return function() {
        var args = arguments,
            index = -1,
            length = nativeMax(args.length - start, 0),
            array = Array(length);

        while (++index < length) {
          array[index] = args[start + index];
        }
        index = -1;
        var otherArgs = Array(start + 1);
        while (++index < start) {
          otherArgs[index] = args[index];
        }
        otherArgs[start] = transform(array);
        return apply(func, this, otherArgs);
      };
    }

    /**
     * Gets the parent value at `path` of `object`.
     *
     * @private
     * @param {Object} object The object to query.
     * @param {Array} path The path to get the parent value of.
     * @returns {*} Returns the parent value.
     */
    function parent(object, path) {
      return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
    }

    /**
     * Reorder `array` according to the specified indexes where the element at
     * the first index is assigned as the first element, the element at
     * the second index is assigned as the second element, and so on.
     *
     * @private
     * @param {Array} array The array to reorder.
     * @param {Array} indexes The arranged array indexes.
     * @returns {Array} Returns `array`.
     */
    function reorder(array, indexes) {
      var arrLength = array.length,
          length = nativeMin(indexes.length, arrLength),
          oldArray = copyArray(array);

      while (length--) {
        var index = indexes[length];
        array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
      }
      return array;
    }

    /**
     * Sets metadata for `func`.
     *
     * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
     * period of time, it will trip its breaker and transition to an identity
     * function to avoid garbage collection pauses in V8. See
     * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
     * for more details.
     *
     * @private
     * @param {Function} func The function to associate metadata with.
     * @param {*} data The metadata.
     * @returns {Function} Returns `func`.
     */
    var setData = shortOut(baseSetData);

    /**
     * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
     *
     * @private
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @returns {number|Object} Returns the timer id or timeout object.
     */
    var setTimeout = ctxSetTimeout || function(func, wait) {
      return root.setTimeout(func, wait);
    };

    /**
     * Sets the `toString` method of `func` to return `string`.
     *
     * @private
     * @param {Function} func The function to modify.
     * @param {Function} string The `toString` result.
     * @returns {Function} Returns `func`.
     */
    var setToString = shortOut(baseSetToString);

    /**
     * Sets the `toString` method of `wrapper` to mimic the source of `reference`
     * with wrapper details in a comment at the top of the source body.
     *
     * @private
     * @param {Function} wrapper The function to modify.
     * @param {Function} reference The reference function.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @returns {Function} Returns `wrapper`.
     */
    function setWrapToString(wrapper, reference, bitmask) {
      var source = (reference + '');
      return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
    }

    /**
     * Creates a function that'll short out and invoke `identity` instead
     * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
     * milliseconds.
     *
     * @private
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new shortable function.
     */
    function shortOut(func) {
      var count = 0,
          lastCalled = 0;

      return function() {
        var stamp = nativeNow(),
            remaining = HOT_SPAN - (stamp - lastCalled);

        lastCalled = stamp;
        if (remaining > 0) {
          if (++count >= HOT_COUNT) {
            return arguments[0];
          }
        } else {
          count = 0;
        }
        return func.apply(undefined, arguments);
      };
    }

    /**
     * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
     *
     * @private
     * @param {Array} array The array to shuffle.
     * @param {number} [size=array.length] The size of `array`.
     * @returns {Array} Returns `array`.
     */
    function shuffleSelf(array, size) {
      var index = -1,
          length = array.length,
          lastIndex = length - 1;

      size = size === undefined ? length : size;
      while (++index < size) {
        var rand = baseRandom(index, lastIndex),
            value = array[rand];

        array[rand] = array[index];
        array[index] = value;
      }
      array.length = size;
      return array;
    }

    /**
     * Converts `string` to a property path array.
     *
     * @private
     * @param {string} string The string to convert.
     * @returns {Array} Returns the property path array.
     */
    var stringToPath = memoizeCapped(function(string) {
      var result = [];
      if (reLeadingDot.test(string)) {
        result.push('');
      }
      string.replace(rePropName, function(match, number, quote, string) {
        result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
      });
      return result;
    });

    /**
     * Converts `value` to a string key if it's not a string or symbol.
     *
     * @private
     * @param {*} value The value to inspect.
     * @returns {string|symbol} Returns the key.
     */
    function toKey(value) {
      if (typeof value == 'string' || isSymbol(value)) {
        return value;
      }
      var result = (value + '');
      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
    }

    /**
     * Converts `func` to its source code.
     *
     * @private
     * @param {Function} func The function to convert.
     * @returns {string} Returns the source code.
     */
    function toSource(func) {
      if (func != null) {
        try {
          return funcToString.call(func);
        } catch (e) {}
        try {
          return (func + '');
        } catch (e) {}
      }
      return '';
    }

    /**
     * Updates wrapper `details` based on `bitmask` flags.
     *
     * @private
     * @returns {Array} details The details to modify.
     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
     * @returns {Array} Returns `details`.
     */
    function updateWrapDetails(details, bitmask) {
      arrayEach(wrapFlags, function(pair) {
        var value = '_.' + pair[0];
        if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
          details.push(value);
        }
      });
      return details.sort();
    }

    /**
     * Creates a clone of `wrapper`.
     *
     * @private
     * @param {Object} wrapper The wrapper to clone.
     * @returns {Object} Returns the cloned wrapper.
     */
    function wrapperClone(wrapper) {
      if (wrapper instanceof LazyWrapper) {
        return wrapper.clone();
      }
      var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
      result.__actions__ = copyArray(wrapper.__actions__);
      result.__index__  = wrapper.__index__;
      result.__values__ = wrapper.__values__;
      return result;
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates an array of elements split into groups the length of `size`.
     * If `array` can't be split evenly, the final chunk will be the remaining
     * elements.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to process.
     * @param {number} [size=1] The length of each chunk
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the new array of chunks.
     * @example
     *
     * _.chunk(['a', 'b', 'c', 'd'], 2);
     * // => [['a', 'b'], ['c', 'd']]
     *
     * _.chunk(['a', 'b', 'c', 'd'], 3);
     * // => [['a', 'b', 'c'], ['d']]
     */
    function chunk(array, size, guard) {
      if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
        size = 1;
      } else {
        size = nativeMax(toInteger(size), 0);
      }
      var length = array == null ? 0 : array.length;
      if (!length || size < 1) {
        return [];
      }
      var index = 0,
          resIndex = 0,
          result = Array(nativeCeil(length / size));

      while (index < length) {
        result[resIndex++] = baseSlice(array, index, (index += size));
      }
      return result;
    }

    /**
     * Creates an array with all falsey values removed. The values `false`, `null`,
     * `0`, `""`, `undefined`, and `NaN` are falsey.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to compact.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.compact([0, 1, false, 2, '', 3]);
     * // => [1, 2, 3]
     */
    function compact(array) {
      var index = -1,
          length = array == null ? 0 : array.length,
          resIndex = 0,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (value) {
          result[resIndex++] = value;
        }
      }
      return result;
    }

    /**
     * Creates a new array concatenating `array` with any additional arrays
     * and/or values.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to concatenate.
     * @param {...*} [values] The values to concatenate.
     * @returns {Array} Returns the new concatenated array.
     * @example
     *
     * var array = [1];
     * var other = _.concat(array, 2, [3], [[4]]);
     *
     * console.log(other);
     * // => [1, 2, 3, [4]]
     *
     * console.log(array);
     * // => [1]
     */
    function concat() {
      var length = arguments.length;
      if (!length) {
        return [];
      }
      var args = Array(length - 1),
          array = arguments[0],
          index = length;

      while (index--) {
        args[index - 1] = arguments[index];
      }
      return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
    }

    /**
     * Creates an array of `array` values not included in the other given arrays
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons. The order and references of result values are
     * determined by the first array.
     *
     * **Note:** Unlike `_.pullAll`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...Array} [values] The values to exclude.
     * @returns {Array} Returns the new array of filtered values.
     * @see _.without, _.xor
     * @example
     *
     * _.difference([2, 1], [2, 3]);
     * // => [1]
     */
    var difference = baseRest(function(array, values) {
      return isArrayLikeObject(array)
        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
        : [];
    });

    /**
     * This method is like `_.difference` except that it accepts `iteratee` which
     * is invoked for each element of `array` and `values` to generate the criterion
     * by which they're compared. The order and references of result values are
     * determined by the first array. The iteratee is invoked with one argument:
     * (value).
     *
     * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...Array} [values] The values to exclude.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
     * // => [1.2]
     *
     * // The `_.property` iteratee shorthand.
     * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
     * // => [{ 'x': 2 }]
     */
    var differenceBy = baseRest(function(array, values) {
      var iteratee = last(values);
      if (isArrayLikeObject(iteratee)) {
        iteratee = undefined;
      }
      return isArrayLikeObject(array)
        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
        : [];
    });

    /**
     * This method is like `_.difference` except that it accepts `comparator`
     * which is invoked to compare elements of `array` to `values`. The order and
     * references of result values are determined by the first array. The comparator
     * is invoked with two arguments: (arrVal, othVal).
     *
     * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...Array} [values] The values to exclude.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     *
     * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
     * // => [{ 'x': 2, 'y': 1 }]
     */
    var differenceWith = baseRest(function(array, values) {
      var comparator = last(values);
      if (isArrayLikeObject(comparator)) {
        comparator = undefined;
      }
      return isArrayLikeObject(array)
        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
        : [];
    });

    /**
     * Creates a slice of `array` with `n` elements dropped from the beginning.
     *
     * @static
     * @memberOf _
     * @since 0.5.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to drop.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.drop([1, 2, 3]);
     * // => [2, 3]
     *
     * _.drop([1, 2, 3], 2);
     * // => [3]
     *
     * _.drop([1, 2, 3], 5);
     * // => []
     *
     * _.drop([1, 2, 3], 0);
     * // => [1, 2, 3]
     */
    function drop(array, n, guard) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      return baseSlice(array, n < 0 ? 0 : n, length);
    }

    /**
     * Creates a slice of `array` with `n` elements dropped from the end.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to drop.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.dropRight([1, 2, 3]);
     * // => [1, 2]
     *
     * _.dropRight([1, 2, 3], 2);
     * // => [1]
     *
     * _.dropRight([1, 2, 3], 5);
     * // => []
     *
     * _.dropRight([1, 2, 3], 0);
     * // => [1, 2, 3]
     */
    function dropRight(array, n, guard) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      n = length - n;
      return baseSlice(array, 0, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` excluding elements dropped from the end.
     * Elements are dropped until `predicate` returns falsey. The predicate is
     * invoked with three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * _.dropRightWhile(users, function(o) { return !o.active; });
     * // => objects for ['barney']
     *
     * // The `_.matches` iteratee shorthand.
     * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
     * // => objects for ['barney', 'fred']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.dropRightWhile(users, ['active', false]);
     * // => objects for ['barney']
     *
     * // The `_.property` iteratee shorthand.
     * _.dropRightWhile(users, 'active');
     * // => objects for ['barney', 'fred', 'pebbles']
     */
    function dropRightWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3), true, true)
        : [];
    }

    /**
     * Creates a slice of `array` excluding elements dropped from the beginning.
     * Elements are dropped until `predicate` returns falsey. The predicate is
     * invoked with three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * _.dropWhile(users, function(o) { return !o.active; });
     * // => objects for ['pebbles']
     *
     * // The `_.matches` iteratee shorthand.
     * _.dropWhile(users, { 'user': 'barney', 'active': false });
     * // => objects for ['fred', 'pebbles']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.dropWhile(users, ['active', false]);
     * // => objects for ['pebbles']
     *
     * // The `_.property` iteratee shorthand.
     * _.dropWhile(users, 'active');
     * // => objects for ['barney', 'fred', 'pebbles']
     */
    function dropWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3), true)
        : [];
    }

    /**
     * Fills elements of `array` with `value` from `start` up to, but not
     * including, `end`.
     *
     * **Note:** This method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 3.2.0
     * @category Array
     * @param {Array} array The array to fill.
     * @param {*} value The value to fill `array` with.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _.fill(array, 'a');
     * console.log(array);
     * // => ['a', 'a', 'a']
     *
     * _.fill(Array(3), 2);
     * // => [2, 2, 2]
     *
     * _.fill([4, 6, 8, 10], '*', 1, 3);
     * // => [4, '*', '*', 10]
     */
    function fill(array, value, start, end) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
        start = 0;
        end = length;
      }
      return baseFill(array, value, start, end);
    }

    /**
     * This method is like `_.find` except that it returns the index of the first
     * element `predicate` returns truthy for instead of the element itself.
     *
     * @static
     * @memberOf _
     * @since 1.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * _.findIndex(users, function(o) { return o.user == 'barney'; });
     * // => 0
     *
     * // The `_.matches` iteratee shorthand.
     * _.findIndex(users, { 'user': 'fred', 'active': false });
     * // => 1
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findIndex(users, ['active', false]);
     * // => 0
     *
     * // The `_.property` iteratee shorthand.
     * _.findIndex(users, 'active');
     * // => 2
     */
    function findIndex(array, predicate, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = fromIndex == null ? 0 : toInteger(fromIndex);
      if (index < 0) {
        index = nativeMax(length + index, 0);
      }
      return baseFindIndex(array, getIteratee(predicate, 3), index);
    }

    /**
     * This method is like `_.findIndex` except that it iterates over elements
     * of `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=array.length-1] The index to search from.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
     * // => 2
     *
     * // The `_.matches` iteratee shorthand.
     * _.findLastIndex(users, { 'user': 'barney', 'active': true });
     * // => 0
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findLastIndex(users, ['active', false]);
     * // => 2
     *
     * // The `_.property` iteratee shorthand.
     * _.findLastIndex(users, 'active');
     * // => 0
     */
    function findLastIndex(array, predicate, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = length - 1;
      if (fromIndex !== undefined) {
        index = toInteger(fromIndex);
        index = fromIndex < 0
          ? nativeMax(length + index, 0)
          : nativeMin(index, length - 1);
      }
      return baseFindIndex(array, getIteratee(predicate, 3), index, true);
    }

    /**
     * Flattens `array` a single level deep.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to flatten.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * _.flatten([1, [2, [3, [4]], 5]]);
     * // => [1, 2, [3, [4]], 5]
     */
    function flatten(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseFlatten(array, 1) : [];
    }

    /**
     * Recursively flattens `array`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to flatten.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * _.flattenDeep([1, [2, [3, [4]], 5]]);
     * // => [1, 2, 3, 4, 5]
     */
    function flattenDeep(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseFlatten(array, INFINITY) : [];
    }

    /**
     * Recursively flatten `array` up to `depth` times.
     *
     * @static
     * @memberOf _
     * @since 4.4.0
     * @category Array
     * @param {Array} array The array to flatten.
     * @param {number} [depth=1] The maximum recursion depth.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * var array = [1, [2, [3, [4]], 5]];
     *
     * _.flattenDepth(array, 1);
     * // => [1, 2, [3, [4]], 5]
     *
     * _.flattenDepth(array, 2);
     * // => [1, 2, 3, [4], 5]
     */
    function flattenDepth(array, depth) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      depth = depth === undefined ? 1 : toInteger(depth);
      return baseFlatten(array, depth);
    }

    /**
     * The inverse of `_.toPairs`; this method returns an object composed
     * from key-value `pairs`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} pairs The key-value pairs.
     * @returns {Object} Returns the new object.
     * @example
     *
     * _.fromPairs([['a', 1], ['b', 2]]);
     * // => { 'a': 1, 'b': 2 }
     */
    function fromPairs(pairs) {
      var index = -1,
          length = pairs == null ? 0 : pairs.length,
          result = {};

      while (++index < length) {
        var pair = pairs[index];
        result[pair[0]] = pair[1];
      }
      return result;
    }

    /**
     * Gets the first element of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @alias first
     * @category Array
     * @param {Array} array The array to query.
     * @returns {*} Returns the first element of `array`.
     * @example
     *
     * _.head([1, 2, 3]);
     * // => 1
     *
     * _.head([]);
     * // => undefined
     */
    function head(array) {
      return (array && array.length) ? array[0] : undefined;
    }

    /**
     * Gets the index at which the first occurrence of `value` is found in `array`
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons. If `fromIndex` is negative, it's used as the
     * offset from the end of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.indexOf([1, 2, 1, 2], 2);
     * // => 1
     *
     * // Search from the `fromIndex`.
     * _.indexOf([1, 2, 1, 2], 2, 2);
     * // => 3
     */
    function indexOf(array, value, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = fromIndex == null ? 0 : toInteger(fromIndex);
      if (index < 0) {
        index = nativeMax(length + index, 0);
      }
      return baseIndexOf(array, value, index);
    }

    /**
     * Gets all but the last element of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to query.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.initial([1, 2, 3]);
     * // => [1, 2]
     */
    function initial(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseSlice(array, 0, -1) : [];
    }

    /**
     * Creates an array of unique values that are included in all given arrays
     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons. The order and references of result values are
     * determined by the first array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of intersecting values.
     * @example
     *
     * _.intersection([2, 1], [2, 3]);
     * // => [2]
     */
    var intersection = baseRest(function(arrays) {
      var mapped = arrayMap(arrays, castArrayLikeObject);
      return (mapped.length && mapped[0] === arrays[0])
        ? baseIntersection(mapped)
        : [];
    });

    /**
     * This method is like `_.intersection` except that it accepts `iteratee`
     * which is invoked for each element of each `arrays` to generate the criterion
     * by which they're compared. The order and references of result values are
     * determined by the first array. The iteratee is invoked with one argument:
     * (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of intersecting values.
     * @example
     *
     * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
     * // => [2.1]
     *
     * // The `_.property` iteratee shorthand.
     * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }]
     */
    var intersectionBy = baseRest(function(arrays) {
      var iteratee = last(arrays),
          mapped = arrayMap(arrays, castArrayLikeObject);

      if (iteratee === last(mapped)) {
        iteratee = undefined;
      } else {
        mapped.pop();
      }
      return (mapped.length && mapped[0] === arrays[0])
        ? baseIntersection(mapped, getIteratee(iteratee, 2))
        : [];
    });

    /**
     * This method is like `_.intersection` except that it accepts `comparator`
     * which is invoked to compare elements of `arrays`. The order and references
     * of result values are determined by the first array. The comparator is
     * invoked with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of intersecting values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.intersectionWith(objects, others, _.isEqual);
     * // => [{ 'x': 1, 'y': 2 }]
     */
    var intersectionWith = baseRest(function(arrays) {
      var comparator = last(arrays),
          mapped = arrayMap(arrays, castArrayLikeObject);

      comparator = typeof comparator == 'function' ? comparator : undefined;
      if (comparator) {
        mapped.pop();
      }
      return (mapped.length && mapped[0] === arrays[0])
        ? baseIntersection(mapped, undefined, comparator)
        : [];
    });

    /**
     * Converts all elements in `array` into a string separated by `separator`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to convert.
     * @param {string} [separator=','] The element separator.
     * @returns {string} Returns the joined string.
     * @example
     *
     * _.join(['a', 'b', 'c'], '~');
     * // => 'a~b~c'
     */
    function join(array, separator) {
      return array == null ? '' : nativeJoin.call(array, separator);
    }

    /**
     * Gets the last element of `array`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to query.
     * @returns {*} Returns the last element of `array`.
     * @example
     *
     * _.last([1, 2, 3]);
     * // => 3
     */
    function last(array) {
      var length = array == null ? 0 : array.length;
      return length ? array[length - 1] : undefined;
    }

    /**
     * This method is like `_.indexOf` except that it iterates over elements of
     * `array` from right to left.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=array.length-1] The index to search from.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.lastIndexOf([1, 2, 1, 2], 2);
     * // => 3
     *
     * // Search from the `fromIndex`.
     * _.lastIndexOf([1, 2, 1, 2], 2, 2);
     * // => 1
     */
    function lastIndexOf(array, value, fromIndex) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return -1;
      }
      var index = length;
      if (fromIndex !== undefined) {
        index = toInteger(fromIndex);
        index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
      }
      return value === value
        ? strictLastIndexOf(array, value, index)
        : baseFindIndex(array, baseIsNaN, index, true);
    }

    /**
     * Gets the element at index `n` of `array`. If `n` is negative, the nth
     * element from the end is returned.
     *
     * @static
     * @memberOf _
     * @since 4.11.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=0] The index of the element to return.
     * @returns {*} Returns the nth element of `array`.
     * @example
     *
     * var array = ['a', 'b', 'c', 'd'];
     *
     * _.nth(array, 1);
     * // => 'b'
     *
     * _.nth(array, -2);
     * // => 'c';
     */
    function nth(array, n) {
      return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
    }

    /**
     * Removes all given values from `array` using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
     * to remove elements from an array by predicate.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {...*} [values] The values to remove.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
     *
     * _.pull(array, 'a', 'c');
     * console.log(array);
     * // => ['b', 'b']
     */
    var pull = baseRest(pullAll);

    /**
     * This method is like `_.pull` except that it accepts an array of values to remove.
     *
     * **Note:** Unlike `_.difference`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
     *
     * _.pullAll(array, ['a', 'c']);
     * console.log(array);
     * // => ['b', 'b']
     */
    function pullAll(array, values) {
      return (array && array.length && values && values.length)
        ? basePullAll(array, values)
        : array;
    }

    /**
     * This method is like `_.pullAll` except that it accepts `iteratee` which is
     * invoked for each element of `array` and `values` to generate the criterion
     * by which they're compared. The iteratee is invoked with one argument: (value).
     *
     * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
     *
     * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
     * console.log(array);
     * // => [{ 'x': 2 }]
     */
    function pullAllBy(array, values, iteratee) {
      return (array && array.length && values && values.length)
        ? basePullAll(array, values, getIteratee(iteratee, 2))
        : array;
    }

    /**
     * This method is like `_.pullAll` except that it accepts `comparator` which
     * is invoked to compare elements of `array` to `values`. The comparator is
     * invoked with two arguments: (arrVal, othVal).
     *
     * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 4.6.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Array} values The values to remove.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
     *
     * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
     * console.log(array);
     * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
     */
    function pullAllWith(array, values, comparator) {
      return (array && array.length && values && values.length)
        ? basePullAll(array, values, undefined, comparator)
        : array;
    }

    /**
     * Removes elements from `array` corresponding to `indexes` and returns an
     * array of removed elements.
     *
     * **Note:** Unlike `_.at`, this method mutates `array`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {...(number|number[])} [indexes] The indexes of elements to remove.
     * @returns {Array} Returns the new array of removed elements.
     * @example
     *
     * var array = ['a', 'b', 'c', 'd'];
     * var pulled = _.pullAt(array, [1, 3]);
     *
     * console.log(array);
     * // => ['a', 'c']
     *
     * console.log(pulled);
     * // => ['b', 'd']
     */
    var pullAt = flatRest(function(array, indexes) {
      var length = array == null ? 0 : array.length,
          result = baseAt(array, indexes);

      basePullAt(array, arrayMap(indexes, function(index) {
        return isIndex(index, length) ? +index : index;
      }).sort(compareAscending));

      return result;
    });

    /**
     * Removes all elements from `array` that `predicate` returns truthy for
     * and returns an array of the removed elements. The predicate is invoked
     * with three arguments: (value, index, array).
     *
     * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
     * to pull elements from an array by value.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new array of removed elements.
     * @example
     *
     * var array = [1, 2, 3, 4];
     * var evens = _.remove(array, function(n) {
     *   return n % 2 == 0;
     * });
     *
     * console.log(array);
     * // => [1, 3]
     *
     * console.log(evens);
     * // => [2, 4]
     */
    function remove(array, predicate) {
      var result = [];
      if (!(array && array.length)) {
        return result;
      }
      var index = -1,
          indexes = [],
          length = array.length;

      predicate = getIteratee(predicate, 3);
      while (++index < length) {
        var value = array[index];
        if (predicate(value, index, array)) {
          result.push(value);
          indexes.push(index);
        }
      }
      basePullAt(array, indexes);
      return result;
    }

    /**
     * Reverses `array` so that the first element becomes the last, the second
     * element becomes the second to last, and so on.
     *
     * **Note:** This method mutates `array` and is based on
     * [`Array#reverse`](https://mdn.io/Array/reverse).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to modify.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _.reverse(array);
     * // => [3, 2, 1]
     *
     * console.log(array);
     * // => [3, 2, 1]
     */
    function reverse(array) {
      return array == null ? array : nativeReverse.call(array);
    }

    /**
     * Creates a slice of `array` from `start` up to, but not including, `end`.
     *
     * **Note:** This method is used instead of
     * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
     * returned.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to slice.
     * @param {number} [start=0] The start position.
     * @param {number} [end=array.length] The end position.
     * @returns {Array} Returns the slice of `array`.
     */
    function slice(array, start, end) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
        start = 0;
        end = length;
      }
      else {
        start = start == null ? 0 : toInteger(start);
        end = end === undefined ? length : toInteger(end);
      }
      return baseSlice(array, start, end);
    }

    /**
     * Uses a binary search to determine the lowest index at which `value`
     * should be inserted into `array` in order to maintain its sort order.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedIndex([30, 50], 40);
     * // => 1
     */
    function sortedIndex(array, value) {
      return baseSortedIndex(array, value);
    }

    /**
     * This method is like `_.sortedIndex` except that it accepts `iteratee`
     * which is invoked for `value` and each element of `array` to compute their
     * sort ranking. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * var objects = [{ 'x': 4 }, { 'x': 5 }];
     *
     * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
     * // => 0
     *
     * // The `_.property` iteratee shorthand.
     * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
     * // => 0
     */
    function sortedIndexBy(array, value, iteratee) {
      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
    }

    /**
     * This method is like `_.indexOf` except that it performs a binary
     * search on a sorted `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
     * // => 1
     */
    function sortedIndexOf(array, value) {
      var length = array == null ? 0 : array.length;
      if (length) {
        var index = baseSortedIndex(array, value);
        if (index < length && eq(array[index], value)) {
          return index;
        }
      }
      return -1;
    }

    /**
     * This method is like `_.sortedIndex` except that it returns the highest
     * index at which `value` should be inserted into `array` in order to
     * maintain its sort order.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
     * // => 4
     */
    function sortedLastIndex(array, value) {
      return baseSortedIndex(array, value, true);
    }

    /**
     * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
     * which is invoked for `value` and each element of `array` to compute their
     * sort ranking. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The sorted array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * var objects = [{ 'x': 4 }, { 'x': 5 }];
     *
     * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
     * // => 1
     *
     * // The `_.property` iteratee shorthand.
     * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
     * // => 1
     */
    function sortedLastIndexBy(array, value, iteratee) {
      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
    }

    /**
     * This method is like `_.lastIndexOf` except that it performs a binary
     * search on a sorted `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {*} value The value to search for.
     * @returns {number} Returns the index of the matched value, else `-1`.
     * @example
     *
     * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
     * // => 3
     */
    function sortedLastIndexOf(array, value) {
      var length = array == null ? 0 : array.length;
      if (length) {
        var index = baseSortedIndex(array, value, true) - 1;
        if (eq(array[index], value)) {
          return index;
        }
      }
      return -1;
    }

    /**
     * This method is like `_.uniq` except that it's designed and optimized
     * for sorted arrays.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.sortedUniq([1, 1, 2]);
     * // => [1, 2]
     */
    function sortedUniq(array) {
      return (array && array.length)
        ? baseSortedUniq(array)
        : [];
    }

    /**
     * This method is like `_.uniqBy` except that it's designed and optimized
     * for sorted arrays.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee] The iteratee invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
     * // => [1.1, 2.3]
     */
    function sortedUniqBy(array, iteratee) {
      return (array && array.length)
        ? baseSortedUniq(array, getIteratee(iteratee, 2))
        : [];
    }

    /**
     * Gets all but the first element of `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.tail([1, 2, 3]);
     * // => [2, 3]
     */
    function tail(array) {
      var length = array == null ? 0 : array.length;
      return length ? baseSlice(array, 1, length) : [];
    }

    /**
     * Creates a slice of `array` with `n` elements taken from the beginning.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to take.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.take([1, 2, 3]);
     * // => [1]
     *
     * _.take([1, 2, 3], 2);
     * // => [1, 2]
     *
     * _.take([1, 2, 3], 5);
     * // => [1, 2, 3]
     *
     * _.take([1, 2, 3], 0);
     * // => []
     */
    function take(array, n, guard) {
      if (!(array && array.length)) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      return baseSlice(array, 0, n < 0 ? 0 : n);
    }

    /**
     * Creates a slice of `array` with `n` elements taken from the end.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {number} [n=1] The number of elements to take.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * _.takeRight([1, 2, 3]);
     * // => [3]
     *
     * _.takeRight([1, 2, 3], 2);
     * // => [2, 3]
     *
     * _.takeRight([1, 2, 3], 5);
     * // => [1, 2, 3]
     *
     * _.takeRight([1, 2, 3], 0);
     * // => []
     */
    function takeRight(array, n, guard) {
      var length = array == null ? 0 : array.length;
      if (!length) {
        return [];
      }
      n = (guard || n === undefined) ? 1 : toInteger(n);
      n = length - n;
      return baseSlice(array, n < 0 ? 0 : n, length);
    }

    /**
     * Creates a slice of `array` with elements taken from the end. Elements are
     * taken until `predicate` returns falsey. The predicate is invoked with
     * three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': true },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': false }
     * ];
     *
     * _.takeRightWhile(users, function(o) { return !o.active; });
     * // => objects for ['fred', 'pebbles']
     *
     * // The `_.matches` iteratee shorthand.
     * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
     * // => objects for ['pebbles']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.takeRightWhile(users, ['active', false]);
     * // => objects for ['fred', 'pebbles']
     *
     * // The `_.property` iteratee shorthand.
     * _.takeRightWhile(users, 'active');
     * // => []
     */
    function takeRightWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3), false, true)
        : [];
    }

    /**
     * Creates a slice of `array` with elements taken from the beginning. Elements
     * are taken until `predicate` returns falsey. The predicate is invoked with
     * three arguments: (value, index, array).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Array
     * @param {Array} array The array to query.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the slice of `array`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'active': false },
     *   { 'user': 'fred',    'active': false },
     *   { 'user': 'pebbles', 'active': true }
     * ];
     *
     * _.takeWhile(users, function(o) { return !o.active; });
     * // => objects for ['barney', 'fred']
     *
     * // The `_.matches` iteratee shorthand.
     * _.takeWhile(users, { 'user': 'barney', 'active': false });
     * // => objects for ['barney']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.takeWhile(users, ['active', false]);
     * // => objects for ['barney', 'fred']
     *
     * // The `_.property` iteratee shorthand.
     * _.takeWhile(users, 'active');
     * // => []
     */
    function takeWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3))
        : [];
    }

    /**
     * Creates an array of unique values, in order, from all given arrays using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of combined values.
     * @example
     *
     * _.union([2], [1, 2]);
     * // => [2, 1]
     */
    var union = baseRest(function(arrays) {
      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
    });

    /**
     * This method is like `_.union` except that it accepts `iteratee` which is
     * invoked for each element of each `arrays` to generate the criterion by
     * which uniqueness is computed. Result values are chosen from the first
     * array in which the value occurs. The iteratee is invoked with one argument:
     * (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of combined values.
     * @example
     *
     * _.unionBy([2.1], [1.2, 2.3], Math.floor);
     * // => [2.1, 1.2]
     *
     * // The `_.property` iteratee shorthand.
     * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    var unionBy = baseRest(function(arrays) {
      var iteratee = last(arrays);
      if (isArrayLikeObject(iteratee)) {
        iteratee = undefined;
      }
      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
    });

    /**
     * This method is like `_.union` except that it accepts `comparator` which
     * is invoked to compare elements of `arrays`. Result values are chosen from
     * the first array in which the value occurs. The comparator is invoked
     * with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of combined values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.unionWith(objects, others, _.isEqual);
     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
     */
    var unionWith = baseRest(function(arrays) {
      var comparator = last(arrays);
      comparator = typeof comparator == 'function' ? comparator : undefined;
      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
    });

    /**
     * Creates a duplicate-free version of an array, using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons, in which only the first occurrence of each element
     * is kept. The order of result values is determined by the order they occur
     * in the array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.uniq([2, 1, 2]);
     * // => [2, 1]
     */
    function uniq(array) {
      return (array && array.length) ? baseUniq(array) : [];
    }

    /**
     * This method is like `_.uniq` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the criterion by which
     * uniqueness is computed. The order of result values is determined by the
     * order they occur in the array. The iteratee is invoked with one argument:
     * (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
     * // => [2.1, 1.2]
     *
     * // The `_.property` iteratee shorthand.
     * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    function uniqBy(array, iteratee) {
      return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
    }

    /**
     * This method is like `_.uniq` except that it accepts `comparator` which
     * is invoked to compare elements of `array`. The order of result values is
     * determined by the order they occur in the array.The comparator is invoked
     * with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new duplicate free array.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.uniqWith(objects, _.isEqual);
     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
     */
    function uniqWith(array, comparator) {
      comparator = typeof comparator == 'function' ? comparator : undefined;
      return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
    }

    /**
     * This method is like `_.zip` except that it accepts an array of grouped
     * elements and creates an array regrouping the elements to their pre-zip
     * configuration.
     *
     * @static
     * @memberOf _
     * @since 1.2.0
     * @category Array
     * @param {Array} array The array of grouped elements to process.
     * @returns {Array} Returns the new array of regrouped elements.
     * @example
     *
     * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
     * // => [['a', 1, true], ['b', 2, false]]
     *
     * _.unzip(zipped);
     * // => [['a', 'b'], [1, 2], [true, false]]
     */
    function unzip(array) {
      if (!(array && array.length)) {
        return [];
      }
      var length = 0;
      array = arrayFilter(array, function(group) {
        if (isArrayLikeObject(group)) {
          length = nativeMax(group.length, length);
          return true;
        }
      });
      return baseTimes(length, function(index) {
        return arrayMap(array, baseProperty(index));
      });
    }

    /**
     * This method is like `_.unzip` except that it accepts `iteratee` to specify
     * how regrouped values should be combined. The iteratee is invoked with the
     * elements of each group: (...group).
     *
     * @static
     * @memberOf _
     * @since 3.8.0
     * @category Array
     * @param {Array} array The array of grouped elements to process.
     * @param {Function} [iteratee=_.identity] The function to combine
     *  regrouped values.
     * @returns {Array} Returns the new array of regrouped elements.
     * @example
     *
     * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
     * // => [[1, 10, 100], [2, 20, 200]]
     *
     * _.unzipWith(zipped, _.add);
     * // => [3, 30, 300]
     */
    function unzipWith(array, iteratee) {
      if (!(array && array.length)) {
        return [];
      }
      var result = unzip(array);
      if (iteratee == null) {
        return result;
      }
      return arrayMap(result, function(group) {
        return apply(iteratee, undefined, group);
      });
    }

    /**
     * Creates an array excluding all given values using
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * for equality comparisons.
     *
     * **Note:** Unlike `_.pull`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {Array} array The array to inspect.
     * @param {...*} [values] The values to exclude.
     * @returns {Array} Returns the new array of filtered values.
     * @see _.difference, _.xor
     * @example
     *
     * _.without([2, 1, 2, 3], 1, 2);
     * // => [3]
     */
    var without = baseRest(function(array, values) {
      return isArrayLikeObject(array)
        ? baseDifference(array, values)
        : [];
    });

    /**
     * Creates an array of unique values that is the
     * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
     * of the given arrays. The order of result values is determined by the order
     * they occur in the arrays.
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @returns {Array} Returns the new array of filtered values.
     * @see _.difference, _.without
     * @example
     *
     * _.xor([2, 1], [2, 3]);
     * // => [1, 3]
     */
    var xor = baseRest(function(arrays) {
      return baseXor(arrayFilter(arrays, isArrayLikeObject));
    });

    /**
     * This method is like `_.xor` except that it accepts `iteratee` which is
     * invoked for each element of each `arrays` to generate the criterion by
     * which by which they're compared. The order of result values is determined
     * by the order they occur in the arrays. The iteratee is invoked with one
     * argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
     * // => [1.2, 3.4]
     *
     * // The `_.property` iteratee shorthand.
     * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 2 }]
     */
    var xorBy = baseRest(function(arrays) {
      var iteratee = last(arrays);
      if (isArrayLikeObject(iteratee)) {
        iteratee = undefined;
      }
      return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
    });

    /**
     * This method is like `_.xor` except that it accepts `comparator` which is
     * invoked to compare elements of `arrays`. The order of result values is
     * determined by the order they occur in the arrays. The comparator is invoked
     * with two arguments: (arrVal, othVal).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Array
     * @param {...Array} [arrays] The arrays to inspect.
     * @param {Function} [comparator] The comparator invoked per element.
     * @returns {Array} Returns the new array of filtered values.
     * @example
     *
     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
     *
     * _.xorWith(objects, others, _.isEqual);
     * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
     */
    var xorWith = baseRest(function(arrays) {
      var comparator = last(arrays);
      comparator = typeof comparator == 'function' ? comparator : undefined;
      return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
    });

    /**
     * Creates an array of grouped elements, the first of which contains the
     * first elements of the given arrays, the second of which contains the
     * second elements of the given arrays, and so on.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Array
     * @param {...Array} [arrays] The arrays to process.
     * @returns {Array} Returns the new array of grouped elements.
     * @example
     *
     * _.zip(['a', 'b'], [1, 2], [true, false]);
     * // => [['a', 1, true], ['b', 2, false]]
     */
    var zip = baseRest(unzip);

    /**
     * This method is like `_.fromPairs` except that it accepts two arrays,
     * one of property identifiers and one of corresponding values.
     *
     * @static
     * @memberOf _
     * @since 0.4.0
     * @category Array
     * @param {Array} [props=[]] The property identifiers.
     * @param {Array} [values=[]] The property values.
     * @returns {Object} Returns the new object.
     * @example
     *
     * _.zipObject(['a', 'b'], [1, 2]);
     * // => { 'a': 1, 'b': 2 }
     */
    function zipObject(props, values) {
      return baseZipObject(props || [], values || [], assignValue);
    }

    /**
     * This method is like `_.zipObject` except that it supports property paths.
     *
     * @static
     * @memberOf _
     * @since 4.1.0
     * @category Array
     * @param {Array} [props=[]] The property identifiers.
     * @param {Array} [values=[]] The property values.
     * @returns {Object} Returns the new object.
     * @example
     *
     * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
     * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
     */
    function zipObjectDeep(props, values) {
      return baseZipObject(props || [], values || [], baseSet);
    }

    /**
     * This method is like `_.zip` except that it accepts `iteratee` to specify
     * how grouped values should be combined. The iteratee is invoked with the
     * elements of each group: (...group).
     *
     * @static
     * @memberOf _
     * @since 3.8.0
     * @category Array
     * @param {...Array} [arrays] The arrays to process.
     * @param {Function} [iteratee=_.identity] The function to combine
     *  grouped values.
     * @returns {Array} Returns the new array of grouped elements.
     * @example
     *
     * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
     *   return a + b + c;
     * });
     * // => [111, 222]
     */
    var zipWith = baseRest(function(arrays) {
      var length = arrays.length,
          iteratee = length > 1 ? arrays[length - 1] : undefined;

      iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
      return unzipWith(arrays, iteratee);
    });

    /*------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` wrapper instance that wraps `value` with explicit method
     * chain sequences enabled. The result of such sequences must be unwrapped
     * with `_#value`.
     *
     * @static
     * @memberOf _
     * @since 1.3.0
     * @category Seq
     * @param {*} value The value to wrap.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36 },
     *   { 'user': 'fred',    'age': 40 },
     *   { 'user': 'pebbles', 'age': 1 }
     * ];
     *
     * var youngest = _
     *   .chain(users)
     *   .sortBy('age')
     *   .map(function(o) {
     *     return o.user + ' is ' + o.age;
     *   })
     *   .head()
     *   .value();
     * // => 'pebbles is 1'
     */
    function chain(value) {
      var result = lodash(value);
      result.__chain__ = true;
      return result;
    }

    /**
     * This method invokes `interceptor` and returns `value`. The interceptor
     * is invoked with one argument; (value). The purpose of this method is to
     * "tap into" a method chain sequence in order to modify intermediate results.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Seq
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @returns {*} Returns `value`.
     * @example
     *
     * _([1, 2, 3])
     *  .tap(function(array) {
     *    // Mutate input array.
     *    array.pop();
     *  })
     *  .reverse()
     *  .value();
     * // => [2, 1]
     */
    function tap(value, interceptor) {
      interceptor(value);
      return value;
    }

    /**
     * This method is like `_.tap` except that it returns the result of `interceptor`.
     * The purpose of this method is to "pass thru" values replacing intermediate
     * results in a method chain sequence.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Seq
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @returns {*} Returns the result of `interceptor`.
     * @example
     *
     * _('  abc  ')
     *  .chain()
     *  .trim()
     *  .thru(function(value) {
     *    return [value];
     *  })
     *  .value();
     * // => ['abc']
     */
    function thru(value, interceptor) {
      return interceptor(value);
    }

    /**
     * This method is the wrapper version of `_.at`.
     *
     * @name at
     * @memberOf _
     * @since 1.0.0
     * @category Seq
     * @param {...(string|string[])} [paths] The property paths to pick.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
     *
     * _(object).at(['a[0].b.c', 'a[1]']).value();
     * // => [3, 4]
     */
    var wrapperAt = flatRest(function(paths) {
      var length = paths.length,
          start = length ? paths[0] : 0,
          value = this.__wrapped__,
          interceptor = function(object) { return baseAt(object, paths); };

      if (length > 1 || this.__actions__.length ||
          !(value instanceof LazyWrapper) || !isIndex(start)) {
        return this.thru(interceptor);
      }
      value = value.slice(start, +start + (length ? 1 : 0));
      value.__actions__.push({
        'func': thru,
        'args': [interceptor],
        'thisArg': undefined
      });
      return new LodashWrapper(value, this.__chain__).thru(function(array) {
        if (length && !array.length) {
          array.push(undefined);
        }
        return array;
      });
    });

    /**
     * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
     *
     * @name chain
     * @memberOf _
     * @since 0.1.0
     * @category Seq
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 }
     * ];
     *
     * // A sequence without explicit chaining.
     * _(users).head();
     * // => { 'user': 'barney', 'age': 36 }
     *
     * // A sequence with explicit chaining.
     * _(users)
     *   .chain()
     *   .head()
     *   .pick('user')
     *   .value();
     * // => { 'user': 'barney' }
     */
    function wrapperChain() {
      return chain(this);
    }

    /**
     * Executes the chain sequence and returns the wrapped result.
     *
     * @name commit
     * @memberOf _
     * @since 3.2.0
     * @category Seq
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var array = [1, 2];
     * var wrapped = _(array).push(3);
     *
     * console.log(array);
     * // => [1, 2]
     *
     * wrapped = wrapped.commit();
     * console.log(array);
     * // => [1, 2, 3]
     *
     * wrapped.last();
     * // => 3
     *
     * console.log(array);
     * // => [1, 2, 3]
     */
    function wrapperCommit() {
      return new LodashWrapper(this.value(), this.__chain__);
    }

    /**
     * Gets the next value on a wrapped object following the
     * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
     *
     * @name next
     * @memberOf _
     * @since 4.0.0
     * @category Seq
     * @returns {Object} Returns the next iterator value.
     * @example
     *
     * var wrapped = _([1, 2]);
     *
     * wrapped.next();
     * // => { 'done': false, 'value': 1 }
     *
     * wrapped.next();
     * // => { 'done': false, 'value': 2 }
     *
     * wrapped.next();
     * // => { 'done': true, 'value': undefined }
     */
    function wrapperNext() {
      if (this.__values__ === undefined) {
        this.__values__ = toArray(this.value());
      }
      var done = this.__index__ >= this.__values__.length,
          value = done ? undefined : this.__values__[this.__index__++];

      return { 'done': done, 'value': value };
    }

    /**
     * Enables the wrapper to be iterable.
     *
     * @name Symbol.iterator
     * @memberOf _
     * @since 4.0.0
     * @category Seq
     * @returns {Object} Returns the wrapper object.
     * @example
     *
     * var wrapped = _([1, 2]);
     *
     * wrapped[Symbol.iterator]() === wrapped;
     * // => true
     *
     * Array.from(wrapped);
     * // => [1, 2]
     */
    function wrapperToIterator() {
      return this;
    }

    /**
     * Creates a clone of the chain sequence planting `value` as the wrapped value.
     *
     * @name plant
     * @memberOf _
     * @since 3.2.0
     * @category Seq
     * @param {*} value The value to plant.
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var wrapped = _([1, 2]).map(square);
     * var other = wrapped.plant([3, 4]);
     *
     * other.value();
     * // => [9, 16]
     *
     * wrapped.value();
     * // => [1, 4]
     */
    function wrapperPlant(value) {
      var result,
          parent = this;

      while (parent instanceof baseLodash) {
        var clone = wrapperClone(parent);
        clone.__index__ = 0;
        clone.__values__ = undefined;
        if (result) {
          previous.__wrapped__ = clone;
        } else {
          result = clone;
        }
        var previous = clone;
        parent = parent.__wrapped__;
      }
      previous.__wrapped__ = value;
      return result;
    }

    /**
     * This method is the wrapper version of `_.reverse`.
     *
     * **Note:** This method mutates the wrapped array.
     *
     * @name reverse
     * @memberOf _
     * @since 0.1.0
     * @category Seq
     * @returns {Object} Returns the new `lodash` wrapper instance.
     * @example
     *
     * var array = [1, 2, 3];
     *
     * _(array).reverse().value()
     * // => [3, 2, 1]
     *
     * console.log(array);
     * // => [3, 2, 1]
     */
    function wrapperReverse() {
      var value = this.__wrapped__;
      if (value instanceof LazyWrapper) {
        var wrapped = value;
        if (this.__actions__.length) {
          wrapped = new LazyWrapper(this);
        }
        wrapped = wrapped.reverse();
        wrapped.__actions__.push({
          'func': thru,
          'args': [reverse],
          'thisArg': undefined
        });
        return new LodashWrapper(wrapped, this.__chain__);
      }
      return this.thru(reverse);
    }

    /**
     * Executes the chain sequence to resolve the unwrapped value.
     *
     * @name value
     * @memberOf _
     * @since 0.1.0
     * @alias toJSON, valueOf
     * @category Seq
     * @returns {*} Returns the resolved unwrapped value.
     * @example
     *
     * _([1, 2, 3]).value();
     * // => [1, 2, 3]
     */
    function wrapperValue() {
      return baseWrapperValue(this.__wrapped__, this.__actions__);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` thru `iteratee`. The corresponding value of
     * each key is the number of times the key was returned by `iteratee`. The
     * iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 0.5.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.countBy([6.1, 4.2, 6.3], Math.floor);
     * // => { '4': 1, '6': 2 }
     *
     * // The `_.property` iteratee shorthand.
     * _.countBy(['one', 'two', 'three'], 'length');
     * // => { '3': 2, '5': 1 }
     */
    var countBy = createAggregator(function(result, value, key) {
      if (hasOwnProperty.call(result, key)) {
        ++result[key];
      } else {
        baseAssignValue(result, key, 1);
      }
    });

    /**
     * Checks if `predicate` returns truthy for **all** elements of `collection`.
     * Iteration is stopped once `predicate` returns falsey. The predicate is
     * invoked with three arguments: (value, index|key, collection).
     *
     * **Note:** This method returns `true` for
     * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
     * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
     * elements of empty collections.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {boolean} Returns `true` if all elements pass the predicate check,
     *  else `false`.
     * @example
     *
     * _.every([true, 1, null, 'yes'], Boolean);
     * // => false
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': false },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * // The `_.matches` iteratee shorthand.
     * _.every(users, { 'user': 'barney', 'active': false });
     * // => false
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.every(users, ['active', false]);
     * // => true
     *
     * // The `_.property` iteratee shorthand.
     * _.every(users, 'active');
     * // => false
     */
    function every(collection, predicate, guard) {
      var func = isArray(collection) ? arrayEvery : baseEvery;
      if (guard && isIterateeCall(collection, predicate, guard)) {
        predicate = undefined;
      }
      return func(collection, getIteratee(predicate, 3));
    }

    /**
     * Iterates over elements of `collection`, returning an array of all elements
     * `predicate` returns truthy for. The predicate is invoked with three
     * arguments: (value, index|key, collection).
     *
     * **Note:** Unlike `_.remove`, this method returns a new array.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     * @see _.reject
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': true },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * _.filter(users, function(o) { return !o.active; });
     * // => objects for ['fred']
     *
     * // The `_.matches` iteratee shorthand.
     * _.filter(users, { 'age': 36, 'active': true });
     * // => objects for ['barney']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.filter(users, ['active', false]);
     * // => objects for ['fred']
     *
     * // The `_.property` iteratee shorthand.
     * _.filter(users, 'active');
     * // => objects for ['barney']
     */
    function filter(collection, predicate) {
      var func = isArray(collection) ? arrayFilter : baseFilter;
      return func(collection, getIteratee(predicate, 3));
    }

    /**
     * Iterates over elements of `collection`, returning the first element
     * `predicate` returns truthy for. The predicate is invoked with three
     * arguments: (value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {*} Returns the matched element, else `undefined`.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36, 'active': true },
     *   { 'user': 'fred',    'age': 40, 'active': false },
     *   { 'user': 'pebbles', 'age': 1,  'active': true }
     * ];
     *
     * _.find(users, function(o) { return o.age < 40; });
     * // => object for 'barney'
     *
     * // The `_.matches` iteratee shorthand.
     * _.find(users, { 'age': 1, 'active': true });
     * // => object for 'pebbles'
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.find(users, ['active', false]);
     * // => object for 'fred'
     *
     * // The `_.property` iteratee shorthand.
     * _.find(users, 'active');
     * // => object for 'barney'
     */
    var find = createFind(findIndex);

    /**
     * This method is like `_.find` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param {number} [fromIndex=collection.length-1] The index to search from.
     * @returns {*} Returns the matched element, else `undefined`.
     * @example
     *
     * _.findLast([1, 2, 3, 4], function(n) {
     *   return n % 2 == 1;
     * });
     * // => 3
     */
    var findLast = createFind(findLastIndex);

    /**
     * Creates a flattened array of values by running each element in `collection`
     * thru `iteratee` and flattening the mapped results. The iteratee is invoked
     * with three arguments: (value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * function duplicate(n) {
     *   return [n, n];
     * }
     *
     * _.flatMap([1, 2], duplicate);
     * // => [1, 1, 2, 2]
     */
    function flatMap(collection, iteratee) {
      return baseFlatten(map(collection, iteratee), 1);
    }

    /**
     * This method is like `_.flatMap` except that it recursively flattens the
     * mapped results.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * function duplicate(n) {
     *   return [[[n, n]]];
     * }
     *
     * _.flatMapDeep([1, 2], duplicate);
     * // => [1, 1, 2, 2]
     */
    function flatMapDeep(collection, iteratee) {
      return baseFlatten(map(collection, iteratee), INFINITY);
    }

    /**
     * This method is like `_.flatMap` except that it recursively flattens the
     * mapped results up to `depth` times.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {number} [depth=1] The maximum recursion depth.
     * @returns {Array} Returns the new flattened array.
     * @example
     *
     * function duplicate(n) {
     *   return [[[n, n]]];
     * }
     *
     * _.flatMapDepth([1, 2], duplicate, 2);
     * // => [[1, 1], [2, 2]]
     */
    function flatMapDepth(collection, iteratee, depth) {
      depth = depth === undefined ? 1 : toInteger(depth);
      return baseFlatten(map(collection, iteratee), depth);
    }

    /**
     * Iterates over elements of `collection` and invokes `iteratee` for each element.
     * The iteratee is invoked with three arguments: (value, index|key, collection).
     * Iteratee functions may exit iteration early by explicitly returning `false`.
     *
     * **Note:** As with other "Collections" methods, objects with a "length"
     * property are iterated like arrays. To avoid this behavior use `_.forIn`
     * or `_.forOwn` for object iteration.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @alias each
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     * @see _.forEachRight
     * @example
     *
     * _.forEach([1, 2], function(value) {
     *   console.log(value);
     * });
     * // => Logs `1` then `2`.
     *
     * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
     */
    function forEach(collection, iteratee) {
      var func = isArray(collection) ? arrayEach : baseEach;
      return func(collection, getIteratee(iteratee, 3));
    }

    /**
     * This method is like `_.forEach` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @alias eachRight
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array|Object} Returns `collection`.
     * @see _.forEach
     * @example
     *
     * _.forEachRight([1, 2], function(value) {
     *   console.log(value);
     * });
     * // => Logs `2` then `1`.
     */
    function forEachRight(collection, iteratee) {
      var func = isArray(collection) ? arrayEachRight : baseEachRight;
      return func(collection, getIteratee(iteratee, 3));
    }

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` thru `iteratee`. The order of grouped values
     * is determined by the order they occur in `collection`. The corresponding
     * value of each key is an array of elements responsible for generating the
     * key. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.groupBy([6.1, 4.2, 6.3], Math.floor);
     * // => { '4': [4.2], '6': [6.1, 6.3] }
     *
     * // The `_.property` iteratee shorthand.
     * _.groupBy(['one', 'two', 'three'], 'length');
     * // => { '3': ['one', 'two'], '5': ['three'] }
     */
    var groupBy = createAggregator(function(result, value, key) {
      if (hasOwnProperty.call(result, key)) {
        result[key].push(value);
      } else {
        baseAssignValue(result, key, [value]);
      }
    });

    /**
     * Checks if `value` is in `collection`. If `collection` is a string, it's
     * checked for a substring of `value`, otherwise
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * is used for equality comparisons. If `fromIndex` is negative, it's used as
     * the offset from the end of `collection`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object|string} collection The collection to inspect.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=0] The index to search from.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
     * @returns {boolean} Returns `true` if `value` is found, else `false`.
     * @example
     *
     * _.includes([1, 2, 3], 1);
     * // => true
     *
     * _.includes([1, 2, 3], 1, 2);
     * // => false
     *
     * _.includes({ 'a': 1, 'b': 2 }, 1);
     * // => true
     *
     * _.includes('abcd', 'bc');
     * // => true
     */
    function includes(collection, value, fromIndex, guard) {
      collection = isArrayLike(collection) ? collection : values(collection);
      fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;

      var length = collection.length;
      if (fromIndex < 0) {
        fromIndex = nativeMax(length + fromIndex, 0);
      }
      return isString(collection)
        ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
        : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
    }

    /**
     * Invokes the method at `path` of each element in `collection`, returning
     * an array of the results of each invoked method. Any additional arguments
     * are provided to each invoked method. If `path` is a function, it's invoked
     * for, and `this` bound to, each element in `collection`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Array|Function|string} path The path of the method to invoke or
     *  the function invoked per iteration.
     * @param {...*} [args] The arguments to invoke each method with.
     * @returns {Array} Returns the array of results.
     * @example
     *
     * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
     * // => [[1, 5, 7], [1, 2, 3]]
     *
     * _.invokeMap([123, 456], String.prototype.split, '');
     * // => [['1', '2', '3'], ['4', '5', '6']]
     */
    var invokeMap = baseRest(function(collection, path, args) {
      var index = -1,
          isFunc = typeof path == 'function',
          result = isArrayLike(collection) ? Array(collection.length) : [];

      baseEach(collection, function(value) {
        result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
      });
      return result;
    });

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` thru `iteratee`. The corresponding value of
     * each key is the last element responsible for generating the key. The
     * iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * var array = [
     *   { 'dir': 'left', 'code': 97 },
     *   { 'dir': 'right', 'code': 100 }
     * ];
     *
     * _.keyBy(array, function(o) {
     *   return String.fromCharCode(o.code);
     * });
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     *
     * _.keyBy(array, 'dir');
     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
     */
    var keyBy = createAggregator(function(result, value, key) {
      baseAssignValue(result, key, value);
    });

    /**
     * Creates an array of values by running each element in `collection` thru
     * `iteratee`. The iteratee is invoked with three arguments:
     * (value, index|key, collection).
     *
     * Many lodash methods are guarded to work as iteratees for methods like
     * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
     *
     * The guarded methods are:
     * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
     * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
     * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
     * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new mapped array.
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * _.map([4, 8], square);
     * // => [16, 64]
     *
     * _.map({ 'a': 4, 'b': 8 }, square);
     * // => [16, 64] (iteration order is not guaranteed)
     *
     * var users = [
     *   { 'user': 'barney' },
     *   { 'user': 'fred' }
     * ];
     *
     * // The `_.property` iteratee shorthand.
     * _.map(users, 'user');
     * // => ['barney', 'fred']
     */
    function map(collection, iteratee) {
      var func = isArray(collection) ? arrayMap : baseMap;
      return func(collection, getIteratee(iteratee, 3));
    }

    /**
     * This method is like `_.sortBy` except that it allows specifying the sort
     * orders of the iteratees to sort by. If `orders` is unspecified, all values
     * are sorted in ascending order. Otherwise, specify an order of "desc" for
     * descending or "asc" for ascending sort order of corresponding values.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
     *  The iteratees to sort by.
     * @param {string[]} [orders] The sort orders of `iteratees`.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
     * @returns {Array} Returns the new sorted array.
     * @example
     *
     * var users = [
     *   { 'user': 'fred',   'age': 48 },
     *   { 'user': 'barney', 'age': 34 },
     *   { 'user': 'fred',   'age': 40 },
     *   { 'user': 'barney', 'age': 36 }
     * ];
     *
     * // Sort by `user` in ascending order and by `age` in descending order.
     * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
     */
    function orderBy(collection, iteratees, orders, guard) {
      if (collection == null) {
        return [];
      }
      if (!isArray(iteratees)) {
        iteratees = iteratees == null ? [] : [iteratees];
      }
      orders = guard ? undefined : orders;
      if (!isArray(orders)) {
        orders = orders == null ? [] : [orders];
      }
      return baseOrderBy(collection, iteratees, orders);
    }

    /**
     * Creates an array of elements split into two groups, the first of which
     * contains elements `predicate` returns truthy for, the second of which
     * contains elements `predicate` returns falsey for. The predicate is
     * invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the array of grouped elements.
     * @example
     *
     * var users = [
     *   { 'user': 'barney',  'age': 36, 'active': false },
     *   { 'user': 'fred',    'age': 40, 'active': true },
     *   { 'user': 'pebbles', 'age': 1,  'active': false }
     * ];
     *
     * _.partition(users, function(o) { return o.active; });
     * // => objects for [['fred'], ['barney', 'pebbles']]
     *
     * // The `_.matches` iteratee shorthand.
     * _.partition(users, { 'age': 1, 'active': false });
     * // => objects for [['pebbles'], ['barney', 'fred']]
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.partition(users, ['active', false]);
     * // => objects for [['barney', 'pebbles'], ['fred']]
     *
     * // The `_.property` iteratee shorthand.
     * _.partition(users, 'active');
     * // => objects for [['fred'], ['barney', 'pebbles']]
     */
    var partition = createAggregator(function(result, value, key) {
      result[key ? 0 : 1].push(value);
    }, function() { return [[], []]; });

    /**
     * Reduces `collection` to a value which is the accumulated result of running
     * each element in `collection` thru `iteratee`, where each successive
     * invocation is supplied the return value of the previous. If `accumulator`
     * is not given, the first element of `collection` is used as the initial
     * value. The iteratee is invoked with four arguments:
     * (accumulator, value, index|key, collection).
     *
     * Many lodash methods are guarded to work as iteratees for methods like
     * `_.reduce`, `_.reduceRight`, and `_.transform`.
     *
     * The guarded methods are:
     * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
     * and `sortBy`
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @returns {*} Returns the accumulated value.
     * @see _.reduceRight
     * @example
     *
     * _.reduce([1, 2], function(sum, n) {
     *   return sum + n;
     * }, 0);
     * // => 3
     *
     * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
     *   (result[value] || (result[value] = [])).push(key);
     *   return result;
     * }, {});
     * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
     */
    function reduce(collection, iteratee, accumulator) {
      var func = isArray(collection) ? arrayReduce : baseReduce,
          initAccum = arguments.length < 3;

      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
    }

    /**
     * This method is like `_.reduce` except that it iterates over elements of
     * `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The initial value.
     * @returns {*} Returns the accumulated value.
     * @see _.reduce
     * @example
     *
     * var array = [[0, 1], [2, 3], [4, 5]];
     *
     * _.reduceRight(array, function(flattened, other) {
     *   return flattened.concat(other);
     * }, []);
     * // => [4, 5, 2, 3, 0, 1]
     */
    function reduceRight(collection, iteratee, accumulator) {
      var func = isArray(collection) ? arrayReduceRight : baseReduce,
          initAccum = arguments.length < 3;

      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
    }

    /**
     * The opposite of `_.filter`; this method returns the elements of `collection`
     * that `predicate` does **not** return truthy for.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the new filtered array.
     * @see _.filter
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': false },
     *   { 'user': 'fred',   'age': 40, 'active': true }
     * ];
     *
     * _.reject(users, function(o) { return !o.active; });
     * // => objects for ['fred']
     *
     * // The `_.matches` iteratee shorthand.
     * _.reject(users, { 'age': 40, 'active': true });
     * // => objects for ['barney']
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.reject(users, ['active', false]);
     * // => objects for ['fred']
     *
     * // The `_.property` iteratee shorthand.
     * _.reject(users, 'active');
     * // => objects for ['barney']
     */
    function reject(collection, predicate) {
      var func = isArray(collection) ? arrayFilter : baseFilter;
      return func(collection, negate(getIteratee(predicate, 3)));
    }

    /**
     * Gets a random element from `collection`.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to sample.
     * @returns {*} Returns the random element.
     * @example
     *
     * _.sample([1, 2, 3, 4]);
     * // => 2
     */
    function sample(collection) {
      var func = isArray(collection) ? arraySample : baseSample;
      return func(collection);
    }

    /**
     * Gets `n` random elements at unique keys from `collection` up to the
     * size of `collection`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Collection
     * @param {Array|Object} collection The collection to sample.
     * @param {number} [n=1] The number of elements to sample.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the random elements.
     * @example
     *
     * _.sampleSize([1, 2, 3], 2);
     * // => [3, 1]
     *
     * _.sampleSize([1, 2, 3], 4);
     * // => [2, 3, 1]
     */
    function sampleSize(collection, n, guard) {
      if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
        n = 1;
      } else {
        n = toInteger(n);
      }
      var func = isArray(collection) ? arraySampleSize : baseSampleSize;
      return func(collection, n);
    }

    /**
     * Creates an array of shuffled values, using a version of the
     * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to shuffle.
     * @returns {Array} Returns the new shuffled array.
     * @example
     *
     * _.shuffle([1, 2, 3, 4]);
     * // => [4, 1, 3, 2]
     */
    function shuffle(collection) {
      var func = isArray(collection) ? arrayShuffle : baseShuffle;
      return func(collection);
    }

    /**
     * Gets the size of `collection` by returning its length for array-like
     * values or the number of own enumerable string keyed properties for objects.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object|string} collection The collection to inspect.
     * @returns {number} Returns the collection size.
     * @example
     *
     * _.size([1, 2, 3]);
     * // => 3
     *
     * _.size({ 'a': 1, 'b': 2 });
     * // => 2
     *
     * _.size('pebbles');
     * // => 7
     */
    function size(collection) {
      if (collection == null) {
        return 0;
      }
      if (isArrayLike(collection)) {
        return isString(collection) ? stringSize(collection) : collection.length;
      }
      var tag = getTag(collection);
      if (tag == mapTag || tag == setTag) {
        return collection.size;
      }
      return baseKeys(collection).length;
    }

    /**
     * Checks if `predicate` returns truthy for **any** element of `collection`.
     * Iteration is stopped once `predicate` returns truthy. The predicate is
     * invoked with three arguments: (value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {boolean} Returns `true` if any element passes the predicate check,
     *  else `false`.
     * @example
     *
     * _.some([null, 0, 'yes', false], Boolean);
     * // => true
     *
     * var users = [
     *   { 'user': 'barney', 'active': true },
     *   { 'user': 'fred',   'active': false }
     * ];
     *
     * // The `_.matches` iteratee shorthand.
     * _.some(users, { 'user': 'barney', 'active': false });
     * // => false
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.some(users, ['active', false]);
     * // => true
     *
     * // The `_.property` iteratee shorthand.
     * _.some(users, 'active');
     * // => true
     */
    function some(collection, predicate, guard) {
      var func = isArray(collection) ? arraySome : baseSome;
      if (guard && isIterateeCall(collection, predicate, guard)) {
        predicate = undefined;
      }
      return func(collection, getIteratee(predicate, 3));
    }

    /**
     * Creates an array of elements, sorted in ascending order by the results of
     * running each element in a collection thru each iteratee. This method
     * performs a stable sort, that is, it preserves the original sort order of
     * equal elements. The iteratees are invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Collection
     * @param {Array|Object} collection The collection to iterate over.
     * @param {...(Function|Function[])} [iteratees=[_.identity]]
     *  The iteratees to sort by.
     * @returns {Array} Returns the new sorted array.
     * @example
     *
     * var users = [
     *   { 'user': 'fred',   'age': 48 },
     *   { 'user': 'barney', 'age': 36 },
     *   { 'user': 'fred',   'age': 40 },
     *   { 'user': 'barney', 'age': 34 }
     * ];
     *
     * _.sortBy(users, [function(o) { return o.user; }]);
     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
     *
     * _.sortBy(users, ['user', 'age']);
     * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
     */
    var sortBy = baseRest(function(collection, iteratees) {
      if (collection == null) {
        return [];
      }
      var length = iteratees.length;
      if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
        iteratees = [];
      } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
        iteratees = [iteratees[0]];
      }
      return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
    });

    /*------------------------------------------------------------------------*/

    /**
     * Gets the timestamp of the number of milliseconds that have elapsed since
     * the Unix epoch (1 January 1970 00:00:00 UTC).
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Date
     * @returns {number} Returns the timestamp.
     * @example
     *
     * _.defer(function(stamp) {
     *   console.log(_.now() - stamp);
     * }, _.now());
     * // => Logs the number of milliseconds it took for the deferred invocation.
     */
    var now = ctxNow || function() {
      return root.Date.now();
    };

    /*------------------------------------------------------------------------*/

    /**
     * The opposite of `_.before`; this method creates a function that invokes
     * `func` once it's called `n` or more times.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {number} n The number of calls before `func` is invoked.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var saves = ['profile', 'settings'];
     *
     * var done = _.after(saves.length, function() {
     *   console.log('done saving!');
     * });
     *
     * _.forEach(saves, function(type) {
     *   asyncSave({ 'type': type, 'complete': done });
     * });
     * // => Logs 'done saving!' after the two async saves have completed.
     */
    function after(n, func) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      n = toInteger(n);
      return function() {
        if (--n < 1) {
          return func.apply(this, arguments);
        }
      };
    }

    /**
     * Creates a function that invokes `func`, with up to `n` arguments,
     * ignoring any additional arguments.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} func The function to cap arguments for.
     * @param {number} [n=func.length] The arity cap.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the new capped function.
     * @example
     *
     * _.map(['6', '8', '10'], _.ary(parseInt, 1));
     * // => [6, 8, 10]
     */
    function ary(func, n, guard) {
      n = guard ? undefined : n;
      n = (func && n == null) ? func.length : n;
      return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
    }

    /**
     * Creates a function that invokes `func`, with the `this` binding and arguments
     * of the created function, while it's called less than `n` times. Subsequent
     * calls to the created function return the result of the last `func` invocation.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {number} n The number of calls at which `func` is no longer invoked.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * jQuery(element).on('click', _.before(5, addContactToList));
     * // => Allows adding up to 4 contacts to the list.
     */
    function before(n, func) {
      var result;
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      n = toInteger(n);
      return function() {
        if (--n > 0) {
          result = func.apply(this, arguments);
        }
        if (n <= 1) {
          func = undefined;
        }
        return result;
      };
    }

    /**
     * Creates a function that invokes `func` with the `this` binding of `thisArg`
     * and `partials` prepended to the arguments it receives.
     *
     * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
     * may be used as a placeholder for partially applied arguments.
     *
     * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
     * property of bound functions.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to bind.
     * @param {*} thisArg The `this` binding of `func`.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * function greet(greeting, punctuation) {
     *   return greeting + ' ' + this.user + punctuation;
     * }
     *
     * var object = { 'user': 'fred' };
     *
     * var bound = _.bind(greet, object, 'hi');
     * bound('!');
     * // => 'hi fred!'
     *
     * // Bound with placeholders.
     * var bound = _.bind(greet, object, _, '!');
     * bound('hi');
     * // => 'hi fred!'
     */
    var bind = baseRest(function(func, thisArg, partials) {
      var bitmask = WRAP_BIND_FLAG;
      if (partials.length) {
        var holders = replaceHolders(partials, getHolder(bind));
        bitmask |= WRAP_PARTIAL_FLAG;
      }
      return createWrap(func, bitmask, thisArg, partials, holders);
    });

    /**
     * Creates a function that invokes the method at `object[key]` with `partials`
     * prepended to the arguments it receives.
     *
     * This method differs from `_.bind` by allowing bound functions to reference
     * methods that may be redefined or don't yet exist. See
     * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
     * for more details.
     *
     * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * @static
     * @memberOf _
     * @since 0.10.0
     * @category Function
     * @param {Object} object The object to invoke the method on.
     * @param {string} key The key of the method.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var object = {
     *   'user': 'fred',
     *   'greet': function(greeting, punctuation) {
     *     return greeting + ' ' + this.user + punctuation;
     *   }
     * };
     *
     * var bound = _.bindKey(object, 'greet', 'hi');
     * bound('!');
     * // => 'hi fred!'
     *
     * object.greet = function(greeting, punctuation) {
     *   return greeting + 'ya ' + this.user + punctuation;
     * };
     *
     * bound('!');
     * // => 'hiya fred!'
     *
     * // Bound with placeholders.
     * var bound = _.bindKey(object, 'greet', _, '!');
     * bound('hi');
     * // => 'hiya fred!'
     */
    var bindKey = baseRest(function(object, key, partials) {
      var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
      if (partials.length) {
        var holders = replaceHolders(partials, getHolder(bindKey));
        bitmask |= WRAP_PARTIAL_FLAG;
      }
      return createWrap(key, bitmask, object, partials, holders);
    });

    /**
     * Creates a function that accepts arguments of `func` and either invokes
     * `func` returning its result, if at least `arity` number of arguments have
     * been provided, or returns a function that accepts the remaining `func`
     * arguments, and so on. The arity of `func` may be specified if `func.length`
     * is not sufficient.
     *
     * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
     * may be used as a placeholder for provided arguments.
     *
     * **Note:** This method doesn't set the "length" property of curried functions.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Function
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var abc = function(a, b, c) {
     *   return [a, b, c];
     * };
     *
     * var curried = _.curry(abc);
     *
     * curried(1)(2)(3);
     * // => [1, 2, 3]
     *
     * curried(1, 2)(3);
     * // => [1, 2, 3]
     *
     * curried(1, 2, 3);
     * // => [1, 2, 3]
     *
     * // Curried with placeholders.
     * curried(1)(_, 3)(2);
     * // => [1, 2, 3]
     */
    function curry(func, arity, guard) {
      arity = guard ? undefined : arity;
      var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
      result.placeholder = curry.placeholder;
      return result;
    }

    /**
     * This method is like `_.curry` except that arguments are applied to `func`
     * in the manner of `_.partialRight` instead of `_.partial`.
     *
     * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for provided arguments.
     *
     * **Note:** This method doesn't set the "length" property of curried functions.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var abc = function(a, b, c) {
     *   return [a, b, c];
     * };
     *
     * var curried = _.curryRight(abc);
     *
     * curried(3)(2)(1);
     * // => [1, 2, 3]
     *
     * curried(2, 3)(1);
     * // => [1, 2, 3]
     *
     * curried(1, 2, 3);
     * // => [1, 2, 3]
     *
     * // Curried with placeholders.
     * curried(3)(1, _)(2);
     * // => [1, 2, 3]
     */
    function curryRight(func, arity, guard) {
      arity = guard ? undefined : arity;
      var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
      result.placeholder = curryRight.placeholder;
      return result;
    }

    /**
     * Creates a debounced function that delays invoking `func` until after `wait`
     * milliseconds have elapsed since the last time the debounced function was
     * invoked. The debounced function comes with a `cancel` method to cancel
     * delayed `func` invocations and a `flush` method to immediately invoke them.
     * Provide `options` to indicate whether `func` should be invoked on the
     * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
     * with the last arguments provided to the debounced function. Subsequent
     * calls to the debounced function return the result of the last `func`
     * invocation.
     *
     * **Note:** If `leading` and `trailing` options are `true`, `func` is
     * invoked on the trailing edge of the timeout only if the debounced function
     * is invoked more than once during the `wait` timeout.
     *
     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
     * until to the next tick, similar to `setTimeout` with a timeout of `0`.
     *
     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
     * for details over the differences between `_.debounce` and `_.throttle`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to debounce.
     * @param {number} [wait=0] The number of milliseconds to delay.
     * @param {Object} [options={}] The options object.
     * @param {boolean} [options.leading=false]
     *  Specify invoking on the leading edge of the timeout.
     * @param {number} [options.maxWait]
     *  The maximum time `func` is allowed to be delayed before it's invoked.
     * @param {boolean} [options.trailing=true]
     *  Specify invoking on the trailing edge of the timeout.
     * @returns {Function} Returns the new debounced function.
     * @example
     *
     * // Avoid costly calculations while the window size is in flux.
     * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
     *
     * // Invoke `sendMail` when clicked, debouncing subsequent calls.
     * jQuery(element).on('click', _.debounce(sendMail, 300, {
     *   'leading': true,
     *   'trailing': false
     * }));
     *
     * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
     * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
     * var source = new EventSource('/stream');
     * jQuery(source).on('message', debounced);
     *
     * // Cancel the trailing debounced invocation.
     * jQuery(window).on('popstate', debounced.cancel);
     */
    function debounce(func, wait, options) {
      var lastArgs,
          lastThis,
          maxWait,
          result,
          timerId,
          lastCallTime,
          lastInvokeTime = 0,
          leading = false,
          maxing = false,
          trailing = true;

      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      wait = toNumber(wait) || 0;
      if (isObject(options)) {
        leading = !!options.leading;
        maxing = 'maxWait' in options;
        maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
      }

      function invokeFunc(time) {
        var args = lastArgs,
            thisArg = lastThis;

        lastArgs = lastThis = undefined;
        lastInvokeTime = time;
        result = func.apply(thisArg, args);
        return result;
      }

      function leadingEdge(time) {
        // Reset any `maxWait` timer.
        lastInvokeTime = time;
        // Start the timer for the trailing edge.
        timerId = setTimeout(timerExpired, wait);
        // Invoke the leading edge.
        return leading ? invokeFunc(time) : result;
      }

      function remainingWait(time) {
        var timeSinceLastCall = time - lastCallTime,
            timeSinceLastInvoke = time - lastInvokeTime,
            result = wait - timeSinceLastCall;

        return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;
      }

      function shouldInvoke(time) {
        var timeSinceLastCall = time - lastCallTime,
            timeSinceLastInvoke = time - lastInvokeTime;

        // Either this is the first call, activity has stopped and we're at the
        // trailing edge, the system time has gone backwards and we're treating
        // it as the trailing edge, or we've hit the `maxWait` limit.
        return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
          (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
      }

      function timerExpired() {
        var time = now();
        if (shouldInvoke(time)) {
          return trailingEdge(time);
        }
        // Restart the timer.
        timerId = setTimeout(timerExpired, remainingWait(time));
      }

      function trailingEdge(time) {
        timerId = undefined;

        // Only invoke if we have `lastArgs` which means `func` has been
        // debounced at least once.
        if (trailing && lastArgs) {
          return invokeFunc(time);
        }
        lastArgs = lastThis = undefined;
        return result;
      }

      function cancel() {
        if (timerId !== undefined) {
          clearTimeout(timerId);
        }
        lastInvokeTime = 0;
        lastArgs = lastCallTime = lastThis = timerId = undefined;
      }

      function flush() {
        return timerId === undefined ? result : trailingEdge(now());
      }

      function debounced() {
        var time = now(),
            isInvoking = shouldInvoke(time);

        lastArgs = arguments;
        lastThis = this;
        lastCallTime = time;

        if (isInvoking) {
          if (timerId === undefined) {
            return leadingEdge(lastCallTime);
          }
          if (maxing) {
            // Handle invocations in a tight loop.
            timerId = setTimeout(timerExpired, wait);
            return invokeFunc(lastCallTime);
          }
        }
        if (timerId === undefined) {
          timerId = setTimeout(timerExpired, wait);
        }
        return result;
      }
      debounced.cancel = cancel;
      debounced.flush = flush;
      return debounced;
    }

    /**
     * Defers invoking the `func` until the current call stack has cleared. Any
     * additional arguments are provided to `func` when it's invoked.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to defer.
     * @param {...*} [args] The arguments to invoke `func` with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.defer(function(text) {
     *   console.log(text);
     * }, 'deferred');
     * // => Logs 'deferred' after one millisecond.
     */
    var defer = baseRest(function(func, args) {
      return baseDelay(func, 1, args);
    });

    /**
     * Invokes `func` after `wait` milliseconds. Any additional arguments are
     * provided to `func` when it's invoked.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay invocation.
     * @param {...*} [args] The arguments to invoke `func` with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.delay(function(text) {
     *   console.log(text);
     * }, 1000, 'later');
     * // => Logs 'later' after one second.
     */
    var delay = baseRest(function(func, wait, args) {
      return baseDelay(func, toNumber(wait) || 0, args);
    });

    /**
     * Creates a function that invokes `func` with arguments reversed.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Function
     * @param {Function} func The function to flip arguments for.
     * @returns {Function} Returns the new flipped function.
     * @example
     *
     * var flipped = _.flip(function() {
     *   return _.toArray(arguments);
     * });
     *
     * flipped('a', 'b', 'c', 'd');
     * // => ['d', 'c', 'b', 'a']
     */
    function flip(func) {
      return createWrap(func, WRAP_FLIP_FLAG);
    }

    /**
     * Creates a function that memoizes the result of `func`. If `resolver` is
     * provided, it determines the cache key for storing the result based on the
     * arguments provided to the memoized function. By default, the first argument
     * provided to the memoized function is used as the map cache key. The `func`
     * is invoked with the `this` binding of the memoized function.
     *
     * **Note:** The cache is exposed as the `cache` property on the memoized
     * function. Its creation may be customized by replacing the `_.memoize.Cache`
     * constructor with one whose instances implement the
     * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
     * method interface of `clear`, `delete`, `get`, `has`, and `set`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to have its output memoized.
     * @param {Function} [resolver] The function to resolve the cache key.
     * @returns {Function} Returns the new memoized function.
     * @example
     *
     * var object = { 'a': 1, 'b': 2 };
     * var other = { 'c': 3, 'd': 4 };
     *
     * var values = _.memoize(_.values);
     * values(object);
     * // => [1, 2]
     *
     * values(other);
     * // => [3, 4]
     *
     * object.a = 2;
     * values(object);
     * // => [1, 2]
     *
     * // Modify the result cache.
     * values.cache.set(object, ['a', 'b']);
     * values(object);
     * // => ['a', 'b']
     *
     * // Replace `_.memoize.Cache`.
     * _.memoize.Cache = WeakMap;
     */
    function memoize(func, resolver) {
      if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      var memoized = function() {
        var args = arguments,
            key = resolver ? resolver.apply(this, args) : args[0],
            cache = memoized.cache;

        if (cache.has(key)) {
          return cache.get(key);
        }
        var result = func.apply(this, args);
        memoized.cache = cache.set(key, result) || cache;
        return result;
      };
      memoized.cache = new (memoize.Cache || MapCache);
      return memoized;
    }

    // Expose `MapCache`.
    memoize.Cache = MapCache;

    /**
     * Creates a function that negates the result of the predicate `func`. The
     * `func` predicate is invoked with the `this` binding and arguments of the
     * created function.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} predicate The predicate to negate.
     * @returns {Function} Returns the new negated function.
     * @example
     *
     * function isEven(n) {
     *   return n % 2 == 0;
     * }
     *
     * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
     * // => [1, 3, 5]
     */
    function negate(predicate) {
      if (typeof predicate != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      return function() {
        var args = arguments;
        switch (args.length) {
          case 0: return !predicate.call(this);
          case 1: return !predicate.call(this, args[0]);
          case 2: return !predicate.call(this, args[0], args[1]);
          case 3: return !predicate.call(this, args[0], args[1], args[2]);
        }
        return !predicate.apply(this, args);
      };
    }

    /**
     * Creates a function that is restricted to invoking `func` once. Repeat calls
     * to the function return the value of the first invocation. The `func` is
     * invoked with the `this` binding and arguments of the created function.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var initialize = _.once(createApplication);
     * initialize();
     * initialize();
     * // => `createApplication` is invoked once
     */
    function once(func) {
      return before(2, func);
    }

    /**
     * Creates a function that invokes `func` with its arguments transformed.
     *
     * @static
     * @since 4.0.0
     * @memberOf _
     * @category Function
     * @param {Function} func The function to wrap.
     * @param {...(Function|Function[])} [transforms=[_.identity]]
     *  The argument transforms.
     * @returns {Function} Returns the new function.
     * @example
     *
     * function doubled(n) {
     *   return n * 2;
     * }
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var func = _.overArgs(function(x, y) {
     *   return [x, y];
     * }, [square, doubled]);
     *
     * func(9, 3);
     * // => [81, 6]
     *
     * func(10, 5);
     * // => [100, 10]
     */
    var overArgs = castRest(function(func, transforms) {
      transforms = (transforms.length == 1 && isArray(transforms[0]))
        ? arrayMap(transforms[0], baseUnary(getIteratee()))
        : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));

      var funcsLength = transforms.length;
      return baseRest(function(args) {
        var index = -1,
            length = nativeMin(args.length, funcsLength);

        while (++index < length) {
          args[index] = transforms[index].call(this, args[index]);
        }
        return apply(func, this, args);
      });
    });

    /**
     * Creates a function that invokes `func` with `partials` prepended to the
     * arguments it receives. This method is like `_.bind` except it does **not**
     * alter the `this` binding.
     *
     * The `_.partial.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * **Note:** This method doesn't set the "length" property of partially
     * applied functions.
     *
     * @static
     * @memberOf _
     * @since 0.2.0
     * @category Function
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * function greet(greeting, name) {
     *   return greeting + ' ' + name;
     * }
     *
     * var sayHelloTo = _.partial(greet, 'hello');
     * sayHelloTo('fred');
     * // => 'hello fred'
     *
     * // Partially applied with placeholders.
     * var greetFred = _.partial(greet, _, 'fred');
     * greetFred('hi');
     * // => 'hi fred'
     */
    var partial = baseRest(function(func, partials) {
      var holders = replaceHolders(partials, getHolder(partial));
      return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
    });

    /**
     * This method is like `_.partial` except that partially applied arguments
     * are appended to the arguments it receives.
     *
     * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
     * builds, may be used as a placeholder for partially applied arguments.
     *
     * **Note:** This method doesn't set the "length" property of partially
     * applied functions.
     *
     * @static
     * @memberOf _
     * @since 1.0.0
     * @category Function
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [partials] The arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * function greet(greeting, name) {
     *   return greeting + ' ' + name;
     * }
     *
     * var greetFred = _.partialRight(greet, 'fred');
     * greetFred('hi');
     * // => 'hi fred'
     *
     * // Partially applied with placeholders.
     * var sayHelloTo = _.partialRight(greet, 'hello', _);
     * sayHelloTo('fred');
     * // => 'hello fred'
     */
    var partialRight = baseRest(function(func, partials) {
      var holders = replaceHolders(partials, getHolder(partialRight));
      return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
    });

    /**
     * Creates a function that invokes `func` with arguments arranged according
     * to the specified `indexes` where the argument value at the first index is
     * provided as the first argument, the argument value at the second index is
     * provided as the second argument, and so on.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Function
     * @param {Function} func The function to rearrange arguments for.
     * @param {...(number|number[])} indexes The arranged argument indexes.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var rearged = _.rearg(function(a, b, c) {
     *   return [a, b, c];
     * }, [2, 0, 1]);
     *
     * rearged('b', 'c', 'a')
     * // => ['a', 'b', 'c']
     */
    var rearg = flatRest(function(func, indexes) {
      return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
    });

    /**
     * Creates a function that invokes `func` with the `this` binding of the
     * created function and arguments from `start` and beyond provided as
     * an array.
     *
     * **Note:** This method is based on the
     * [rest parameter](https://mdn.io/rest_parameters).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Function
     * @param {Function} func The function to apply a rest parameter to.
     * @param {number} [start=func.length-1] The start position of the rest parameter.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var say = _.rest(function(what, names) {
     *   return what + ' ' + _.initial(names).join(', ') +
     *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
     * });
     *
     * say('hello', 'fred', 'barney', 'pebbles');
     * // => 'hello fred, barney, & pebbles'
     */
    function rest(func, start) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      start = start === undefined ? start : toInteger(start);
      return baseRest(func, start);
    }

    /**
     * Creates a function that invokes `func` with the `this` binding of the
     * create function and an array of arguments much like
     * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
     *
     * **Note:** This method is based on the
     * [spread operator](https://mdn.io/spread_operator).
     *
     * @static
     * @memberOf _
     * @since 3.2.0
     * @category Function
     * @param {Function} func The function to spread arguments over.
     * @param {number} [start=0] The start position of the spread.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var say = _.spread(function(who, what) {
     *   return who + ' says ' + what;
     * });
     *
     * say(['fred', 'hello']);
     * // => 'fred says hello'
     *
     * var numbers = Promise.all([
     *   Promise.resolve(40),
     *   Promise.resolve(36)
     * ]);
     *
     * numbers.then(_.spread(function(x, y) {
     *   return x + y;
     * }));
     * // => a Promise of 76
     */
    function spread(func, start) {
      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      start = start == null ? 0 : nativeMax(toInteger(start), 0);
      return baseRest(function(args) {
        var array = args[start],
            otherArgs = castSlice(args, 0, start);

        if (array) {
          arrayPush(otherArgs, array);
        }
        return apply(func, this, otherArgs);
      });
    }

    /**
     * Creates a throttled function that only invokes `func` at most once per
     * every `wait` milliseconds. The throttled function comes with a `cancel`
     * method to cancel delayed `func` invocations and a `flush` method to
     * immediately invoke them. Provide `options` to indicate whether `func`
     * should be invoked on the leading and/or trailing edge of the `wait`
     * timeout. The `func` is invoked with the last arguments provided to the
     * throttled function. Subsequent calls to the throttled function return the
     * result of the last `func` invocation.
     *
     * **Note:** If `leading` and `trailing` options are `true`, `func` is
     * invoked on the trailing edge of the timeout only if the throttled function
     * is invoked more than once during the `wait` timeout.
     *
     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
     * until to the next tick, similar to `setTimeout` with a timeout of `0`.
     *
     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
     * for details over the differences between `_.throttle` and `_.debounce`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {Function} func The function to throttle.
     * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
     * @param {Object} [options={}] The options object.
     * @param {boolean} [options.leading=true]
     *  Specify invoking on the leading edge of the timeout.
     * @param {boolean} [options.trailing=true]
     *  Specify invoking on the trailing edge of the timeout.
     * @returns {Function} Returns the new throttled function.
     * @example
     *
     * // Avoid excessively updating the position while scrolling.
     * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
     *
     * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
     * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
     * jQuery(element).on('click', throttled);
     *
     * // Cancel the trailing throttled invocation.
     * jQuery(window).on('popstate', throttled.cancel);
     */
    function throttle(func, wait, options) {
      var leading = true,
          trailing = true;

      if (typeof func != 'function') {
        throw new TypeError(FUNC_ERROR_TEXT);
      }
      if (isObject(options)) {
        leading = 'leading' in options ? !!options.leading : leading;
        trailing = 'trailing' in options ? !!options.trailing : trailing;
      }
      return debounce(func, wait, {
        'leading': leading,
        'maxWait': wait,
        'trailing': trailing
      });
    }

    /**
     * Creates a function that accepts up to one argument, ignoring any
     * additional arguments.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Function
     * @param {Function} func The function to cap arguments for.
     * @returns {Function} Returns the new capped function.
     * @example
     *
     * _.map(['6', '8', '10'], _.unary(parseInt));
     * // => [6, 8, 10]
     */
    function unary(func) {
      return ary(func, 1);
    }

    /**
     * Creates a function that provides `value` to `wrapper` as its first
     * argument. Any additional arguments provided to the function are appended
     * to those provided to the `wrapper`. The wrapper is invoked with the `this`
     * binding of the created function.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Function
     * @param {*} value The value to wrap.
     * @param {Function} [wrapper=identity] The wrapper function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var p = _.wrap(_.escape, function(func, text) {
     *   return '<p>' + func(text) + '</p>';
     * });
     *
     * p('fred, barney, & pebbles');
     * // => '<p>fred, barney, &amp; pebbles</p>'
     */
    function wrap(value, wrapper) {
      return partial(castFunction(wrapper), value);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Casts `value` as an array if it's not one.
     *
     * @static
     * @memberOf _
     * @since 4.4.0
     * @category Lang
     * @param {*} value The value to inspect.
     * @returns {Array} Returns the cast array.
     * @example
     *
     * _.castArray(1);
     * // => [1]
     *
     * _.castArray({ 'a': 1 });
     * // => [{ 'a': 1 }]
     *
     * _.castArray('abc');
     * // => ['abc']
     *
     * _.castArray(null);
     * // => [null]
     *
     * _.castArray(undefined);
     * // => [undefined]
     *
     * _.castArray();
     * // => []
     *
     * var array = [1, 2, 3];
     * console.log(_.castArray(array) === array);
     * // => true
     */
    function castArray() {
      if (!arguments.length) {
        return [];
      }
      var value = arguments[0];
      return isArray(value) ? value : [value];
    }

    /**
     * Creates a shallow clone of `value`.
     *
     * **Note:** This method is loosely based on the
     * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
     * and supports cloning arrays, array buffers, booleans, date objects, maps,
     * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
     * arrays. The own enumerable properties of `arguments` objects are cloned
     * as plain objects. An empty object is returned for uncloneable values such
     * as error objects, functions, DOM nodes, and WeakMaps.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to clone.
     * @returns {*} Returns the cloned value.
     * @see _.cloneDeep
     * @example
     *
     * var objects = [{ 'a': 1 }, { 'b': 2 }];
     *
     * var shallow = _.clone(objects);
     * console.log(shallow[0] === objects[0]);
     * // => true
     */
    function clone(value) {
      return baseClone(value, CLONE_SYMBOLS_FLAG);
    }

    /**
     * This method is like `_.clone` except that it accepts `customizer` which
     * is invoked to produce the cloned value. If `customizer` returns `undefined`,
     * cloning is handled by the method instead. The `customizer` is invoked with
     * up to four arguments; (value [, index|key, object, stack]).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to clone.
     * @param {Function} [customizer] The function to customize cloning.
     * @returns {*} Returns the cloned value.
     * @see _.cloneDeepWith
     * @example
     *
     * function customizer(value) {
     *   if (_.isElement(value)) {
     *     return value.cloneNode(false);
     *   }
     * }
     *
     * var el = _.cloneWith(document.body, customizer);
     *
     * console.log(el === document.body);
     * // => false
     * console.log(el.nodeName);
     * // => 'BODY'
     * console.log(el.childNodes.length);
     * // => 0
     */
    function cloneWith(value, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
    }

    /**
     * This method is like `_.clone` except that it recursively clones `value`.
     *
     * @static
     * @memberOf _
     * @since 1.0.0
     * @category Lang
     * @param {*} value The value to recursively clone.
     * @returns {*} Returns the deep cloned value.
     * @see _.clone
     * @example
     *
     * var objects = [{ 'a': 1 }, { 'b': 2 }];
     *
     * var deep = _.cloneDeep(objects);
     * console.log(deep[0] === objects[0]);
     * // => false
     */
    function cloneDeep(value) {
      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
    }

    /**
     * This method is like `_.cloneWith` except that it recursively clones `value`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to recursively clone.
     * @param {Function} [customizer] The function to customize cloning.
     * @returns {*} Returns the deep cloned value.
     * @see _.cloneWith
     * @example
     *
     * function customizer(value) {
     *   if (_.isElement(value)) {
     *     return value.cloneNode(true);
     *   }
     * }
     *
     * var el = _.cloneDeepWith(document.body, customizer);
     *
     * console.log(el === document.body);
     * // => false
     * console.log(el.nodeName);
     * // => 'BODY'
     * console.log(el.childNodes.length);
     * // => 20
     */
    function cloneDeepWith(value, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
    }

    /**
     * Checks if `object` conforms to `source` by invoking the predicate
     * properties of `source` with the corresponding property values of `object`.
     *
     * **Note:** This method is equivalent to `_.conforms` when `source` is
     * partially applied.
     *
     * @static
     * @memberOf _
     * @since 4.14.0
     * @category Lang
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property predicates to conform to.
     * @returns {boolean} Returns `true` if `object` conforms, else `false`.
     * @example
     *
     * var object = { 'a': 1, 'b': 2 };
     *
     * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
     * // => true
     *
     * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
     * // => false
     */
    function conformsTo(object, source) {
      return source == null || baseConformsTo(object, source, keys(source));
    }

    /**
     * Performs a
     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
     * comparison between two values to determine if they are equivalent.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * var object = { 'a': 1 };
     * var other = { 'a': 1 };
     *
     * _.eq(object, object);
     * // => true
     *
     * _.eq(object, other);
     * // => false
     *
     * _.eq('a', 'a');
     * // => true
     *
     * _.eq('a', Object('a'));
     * // => false
     *
     * _.eq(NaN, NaN);
     * // => true
     */
    function eq(value, other) {
      return value === other || (value !== value && other !== other);
    }

    /**
     * Checks if `value` is greater than `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than `other`,
     *  else `false`.
     * @see _.lt
     * @example
     *
     * _.gt(3, 1);
     * // => true
     *
     * _.gt(3, 3);
     * // => false
     *
     * _.gt(1, 3);
     * // => false
     */
    var gt = createRelationalOperation(baseGt);

    /**
     * Checks if `value` is greater than or equal to `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is greater than or equal to
     *  `other`, else `false`.
     * @see _.lte
     * @example
     *
     * _.gte(3, 1);
     * // => true
     *
     * _.gte(3, 3);
     * // => true
     *
     * _.gte(1, 3);
     * // => false
     */
    var gte = createRelationalOperation(function(value, other) {
      return value >= other;
    });

    /**
     * Checks if `value` is likely an `arguments` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an `arguments` object,
     *  else `false`.
     * @example
     *
     * _.isArguments(function() { return arguments; }());
     * // => true
     *
     * _.isArguments([1, 2, 3]);
     * // => false
     */
    var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
      return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
        !propertyIsEnumerable.call(value, 'callee');
    };

    /**
     * Checks if `value` is classified as an `Array` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array, else `false`.
     * @example
     *
     * _.isArray([1, 2, 3]);
     * // => true
     *
     * _.isArray(document.body.children);
     * // => false
     *
     * _.isArray('abc');
     * // => false
     *
     * _.isArray(_.noop);
     * // => false
     */
    var isArray = Array.isArray;

    /**
     * Checks if `value` is classified as an `ArrayBuffer` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
     * @example
     *
     * _.isArrayBuffer(new ArrayBuffer(2));
     * // => true
     *
     * _.isArrayBuffer(new Array(2));
     * // => false
     */
    var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;

    /**
     * Checks if `value` is array-like. A value is considered array-like if it's
     * not a function and has a `value.length` that's an integer greater than or
     * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
     * @example
     *
     * _.isArrayLike([1, 2, 3]);
     * // => true
     *
     * _.isArrayLike(document.body.children);
     * // => true
     *
     * _.isArrayLike('abc');
     * // => true
     *
     * _.isArrayLike(_.noop);
     * // => false
     */
    function isArrayLike(value) {
      return value != null && isLength(value.length) && !isFunction(value);
    }

    /**
     * This method is like `_.isArrayLike` except that it also checks if `value`
     * is an object.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an array-like object,
     *  else `false`.
     * @example
     *
     * _.isArrayLikeObject([1, 2, 3]);
     * // => true
     *
     * _.isArrayLikeObject(document.body.children);
     * // => true
     *
     * _.isArrayLikeObject('abc');
     * // => false
     *
     * _.isArrayLikeObject(_.noop);
     * // => false
     */
    function isArrayLikeObject(value) {
      return isObjectLike(value) && isArrayLike(value);
    }

    /**
     * Checks if `value` is classified as a boolean primitive or object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
     * @example
     *
     * _.isBoolean(false);
     * // => true
     *
     * _.isBoolean(null);
     * // => false
     */
    function isBoolean(value) {
      return value === true || value === false ||
        (isObjectLike(value) && baseGetTag(value) == boolTag);
    }

    /**
     * Checks if `value` is a buffer.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
     * @example
     *
     * _.isBuffer(new Buffer(2));
     * // => true
     *
     * _.isBuffer(new Uint8Array(2));
     * // => false
     */
    var isBuffer = nativeIsBuffer || stubFalse;

    /**
     * Checks if `value` is classified as a `Date` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
     * @example
     *
     * _.isDate(new Date);
     * // => true
     *
     * _.isDate('Mon April 23 2012');
     * // => false
     */
    var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;

    /**
     * Checks if `value` is likely a DOM element.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
     * @example
     *
     * _.isElement(document.body);
     * // => true
     *
     * _.isElement('<body>');
     * // => false
     */
    function isElement(value) {
      return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
    }

    /**
     * Checks if `value` is an empty object, collection, map, or set.
     *
     * Objects are considered empty if they have no own enumerable string keyed
     * properties.
     *
     * Array-like values such as `arguments` objects, arrays, buffers, strings, or
     * jQuery-like collections are considered empty if they have a `length` of `0`.
     * Similarly, maps and sets are considered empty if they have a `size` of `0`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
     * @example
     *
     * _.isEmpty(null);
     * // => true
     *
     * _.isEmpty(true);
     * // => true
     *
     * _.isEmpty(1);
     * // => true
     *
     * _.isEmpty([1, 2, 3]);
     * // => false
     *
     * _.isEmpty({ 'a': 1 });
     * // => false
     */
    function isEmpty(value) {
      if (value == null) {
        return true;
      }
      if (isArrayLike(value) &&
          (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
            isBuffer(value) || isTypedArray(value) || isArguments(value))) {
        return !value.length;
      }
      var tag = getTag(value);
      if (tag == mapTag || tag == setTag) {
        return !value.size;
      }
      if (isPrototype(value)) {
        return !baseKeys(value).length;
      }
      for (var key in value) {
        if (hasOwnProperty.call(value, key)) {
          return false;
        }
      }
      return true;
    }

    /**
     * Performs a deep comparison between two values to determine if they are
     * equivalent.
     *
     * **Note:** This method supports comparing arrays, array buffers, booleans,
     * date objects, error objects, maps, numbers, `Object` objects, regexes,
     * sets, strings, symbols, and typed arrays. `Object` objects are compared
     * by their own, not inherited, enumerable properties. Functions and DOM
     * nodes are compared by strict equality, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * var object = { 'a': 1 };
     * var other = { 'a': 1 };
     *
     * _.isEqual(object, other);
     * // => true
     *
     * object === other;
     * // => false
     */
    function isEqual(value, other) {
      return baseIsEqual(value, other);
    }

    /**
     * This method is like `_.isEqual` except that it accepts `customizer` which
     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
     * are handled by the method instead. The `customizer` is invoked with up to
     * six arguments: (objValue, othValue [, index|key, object, other, stack]).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @param {Function} [customizer] The function to customize comparisons.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * function isGreeting(value) {
     *   return /^h(?:i|ello)$/.test(value);
     * }
     *
     * function customizer(objValue, othValue) {
     *   if (isGreeting(objValue) && isGreeting(othValue)) {
     *     return true;
     *   }
     * }
     *
     * var array = ['hello', 'goodbye'];
     * var other = ['hi', 'goodbye'];
     *
     * _.isEqualWith(array, other, customizer);
     * // => true
     */
    function isEqualWith(value, other, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      var result = customizer ? customizer(value, other) : undefined;
      return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
    }

    /**
     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
     * `SyntaxError`, `TypeError`, or `URIError` object.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
     * @example
     *
     * _.isError(new Error);
     * // => true
     *
     * _.isError(Error);
     * // => false
     */
    function isError(value) {
      if (!isObjectLike(value)) {
        return false;
      }
      var tag = baseGetTag(value);
      return tag == errorTag || tag == domExcTag ||
        (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
    }

    /**
     * Checks if `value` is a finite primitive number.
     *
     * **Note:** This method is based on
     * [`Number.isFinite`](https://mdn.io/Number/isFinite).
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
     * @example
     *
     * _.isFinite(3);
     * // => true
     *
     * _.isFinite(Number.MIN_VALUE);
     * // => true
     *
     * _.isFinite(Infinity);
     * // => false
     *
     * _.isFinite('3');
     * // => false
     */
    function isFinite(value) {
      return typeof value == 'number' && nativeIsFinite(value);
    }

    /**
     * Checks if `value` is classified as a `Function` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a function, else `false`.
     * @example
     *
     * _.isFunction(_);
     * // => true
     *
     * _.isFunction(/abc/);
     * // => false
     */
    function isFunction(value) {
      if (!isObject(value)) {
        return false;
      }
      // The use of `Object#toString` avoids issues with the `typeof` operator
      // in Safari 9 which returns 'object' for typed arrays and other constructors.
      var tag = baseGetTag(value);
      return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
    }

    /**
     * Checks if `value` is an integer.
     *
     * **Note:** This method is based on
     * [`Number.isInteger`](https://mdn.io/Number/isInteger).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
     * @example
     *
     * _.isInteger(3);
     * // => true
     *
     * _.isInteger(Number.MIN_VALUE);
     * // => false
     *
     * _.isInteger(Infinity);
     * // => false
     *
     * _.isInteger('3');
     * // => false
     */
    function isInteger(value) {
      return typeof value == 'number' && value == toInteger(value);
    }

    /**
     * Checks if `value` is a valid array-like length.
     *
     * **Note:** This method is loosely based on
     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
     * @example
     *
     * _.isLength(3);
     * // => true
     *
     * _.isLength(Number.MIN_VALUE);
     * // => false
     *
     * _.isLength(Infinity);
     * // => false
     *
     * _.isLength('3');
     * // => false
     */
    function isLength(value) {
      return typeof value == 'number' &&
        value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
    }

    /**
     * Checks if `value` is the
     * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
     * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
     * @example
     *
     * _.isObject({});
     * // => true
     *
     * _.isObject([1, 2, 3]);
     * // => true
     *
     * _.isObject(_.noop);
     * // => true
     *
     * _.isObject(null);
     * // => false
     */
    function isObject(value) {
      var type = typeof value;
      return value != null && (type == 'object' || type == 'function');
    }

    /**
     * Checks if `value` is object-like. A value is object-like if it's not `null`
     * and has a `typeof` result of "object".
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
     * @example
     *
     * _.isObjectLike({});
     * // => true
     *
     * _.isObjectLike([1, 2, 3]);
     * // => true
     *
     * _.isObjectLike(_.noop);
     * // => false
     *
     * _.isObjectLike(null);
     * // => false
     */
    function isObjectLike(value) {
      return value != null && typeof value == 'object';
    }

    /**
     * Checks if `value` is classified as a `Map` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a map, else `false`.
     * @example
     *
     * _.isMap(new Map);
     * // => true
     *
     * _.isMap(new WeakMap);
     * // => false
     */
    var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;

    /**
     * Performs a partial deep comparison between `object` and `source` to
     * determine if `object` contains equivalent property values.
     *
     * **Note:** This method is equivalent to `_.matches` when `source` is
     * partially applied.
     *
     * Partial comparisons will match empty array and empty object `source`
     * values against any array or object value, respectively. See `_.isEqual`
     * for a list of supported value comparisons.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property values to match.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     * @example
     *
     * var object = { 'a': 1, 'b': 2 };
     *
     * _.isMatch(object, { 'b': 2 });
     * // => true
     *
     * _.isMatch(object, { 'b': 1 });
     * // => false
     */
    function isMatch(object, source) {
      return object === source || baseIsMatch(object, source, getMatchData(source));
    }

    /**
     * This method is like `_.isMatch` except that it accepts `customizer` which
     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
     * are handled by the method instead. The `customizer` is invoked with five
     * arguments: (objValue, srcValue, index|key, object, source).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {Object} object The object to inspect.
     * @param {Object} source The object of property values to match.
     * @param {Function} [customizer] The function to customize comparisons.
     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
     * @example
     *
     * function isGreeting(value) {
     *   return /^h(?:i|ello)$/.test(value);
     * }
     *
     * function customizer(objValue, srcValue) {
     *   if (isGreeting(objValue) && isGreeting(srcValue)) {
     *     return true;
     *   }
     * }
     *
     * var object = { 'greeting': 'hello' };
     * var source = { 'greeting': 'hi' };
     *
     * _.isMatchWith(object, source, customizer);
     * // => true
     */
    function isMatchWith(object, source, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return baseIsMatch(object, source, getMatchData(source), customizer);
    }

    /**
     * Checks if `value` is `NaN`.
     *
     * **Note:** This method is based on
     * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
     * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
     * `undefined` and other non-number values.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
     * @example
     *
     * _.isNaN(NaN);
     * // => true
     *
     * _.isNaN(new Number(NaN));
     * // => true
     *
     * isNaN(undefined);
     * // => true
     *
     * _.isNaN(undefined);
     * // => false
     */
    function isNaN(value) {
      // An `NaN` primitive is the only value that is not equal to itself.
      // Perform the `toStringTag` check first to avoid errors with some
      // ActiveX objects in IE.
      return isNumber(value) && value != +value;
    }

    /**
     * Checks if `value` is a pristine native function.
     *
     * **Note:** This method can't reliably detect native functions in the presence
     * of the core-js package because core-js circumvents this kind of detection.
     * Despite multiple requests, the core-js maintainer has made it clear: any
     * attempt to fix the detection will be obstructed. As a result, we're left
     * with little choice but to throw an error. Unfortunately, this also affects
     * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
     * which rely on core-js.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a native function,
     *  else `false`.
     * @example
     *
     * _.isNative(Array.prototype.push);
     * // => true
     *
     * _.isNative(_);
     * // => false
     */
    function isNative(value) {
      if (isMaskable(value)) {
        throw new Error(CORE_ERROR_TEXT);
      }
      return baseIsNative(value);
    }

    /**
     * Checks if `value` is `null`.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
     * @example
     *
     * _.isNull(null);
     * // => true
     *
     * _.isNull(void 0);
     * // => false
     */
    function isNull(value) {
      return value === null;
    }

    /**
     * Checks if `value` is `null` or `undefined`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
     * @example
     *
     * _.isNil(null);
     * // => true
     *
     * _.isNil(void 0);
     * // => true
     *
     * _.isNil(NaN);
     * // => false
     */
    function isNil(value) {
      return value == null;
    }

    /**
     * Checks if `value` is classified as a `Number` primitive or object.
     *
     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
     * classified as numbers, use the `_.isFinite` method.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a number, else `false`.
     * @example
     *
     * _.isNumber(3);
     * // => true
     *
     * _.isNumber(Number.MIN_VALUE);
     * // => true
     *
     * _.isNumber(Infinity);
     * // => true
     *
     * _.isNumber('3');
     * // => false
     */
    function isNumber(value) {
      return typeof value == 'number' ||
        (isObjectLike(value) && baseGetTag(value) == numberTag);
    }

    /**
     * Checks if `value` is a plain object, that is, an object created by the
     * `Object` constructor or one with a `[[Prototype]]` of `null`.
     *
     * @static
     * @memberOf _
     * @since 0.8.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     * }
     *
     * _.isPlainObject(new Foo);
     * // => false
     *
     * _.isPlainObject([1, 2, 3]);
     * // => false
     *
     * _.isPlainObject({ 'x': 0, 'y': 0 });
     * // => true
     *
     * _.isPlainObject(Object.create(null));
     * // => true
     */
    function isPlainObject(value) {
      if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
        return false;
      }
      var proto = getPrototype(value);
      if (proto === null) {
        return true;
      }
      var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
      return typeof Ctor == 'function' && Ctor instanceof Ctor &&
        funcToString.call(Ctor) == objectCtorString;
    }

    /**
     * Checks if `value` is classified as a `RegExp` object.
     *
     * @static
     * @memberOf _
     * @since 0.1.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
     * @example
     *
     * _.isRegExp(/abc/);
     * // => true
     *
     * _.isRegExp('/abc/');
     * // => false
     */
    var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;

    /**
     * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
     * double precision number which isn't the result of a rounded unsafe integer.
     *
     * **Note:** This method is based on
     * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
     * @example
     *
     * _.isSafeInteger(3);
     * // => true
     *
     * _.isSafeInteger(Number.MIN_VALUE);
     * // => false
     *
     * _.isSafeInteger(Infinity);
     * // => false
     *
     * _.isSafeInteger('3');
     * // => false
     */
    function isSafeInteger(value) {
      return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
    }

    /**
     * Checks if `value` is classified as a `Set` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a set, else `false`.
     * @example
     *
     * _.isSet(new Set);
     * // => true
     *
     * _.isSet(new WeakSet);
     * // => false
     */
    var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;

    /**
     * Checks if `value` is classified as a `String` primitive or object.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a string, else `false`.
     * @example
     *
     * _.isString('abc');
     * // => true
     *
     * _.isString(1);
     * // => false
     */
    function isString(value) {
      return typeof value == 'string' ||
        (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
    }

    /**
     * Checks if `value` is classified as a `Symbol` primitive or object.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
     * @example
     *
     * _.isSymbol(Symbol.iterator);
     * // => true
     *
     * _.isSymbol('abc');
     * // => false
     */
    function isSymbol(value) {
      return typeof value == 'symbol' ||
        (isObjectLike(value) && baseGetTag(value) == symbolTag);
    }

    /**
     * Checks if `value` is classified as a typed array.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
     * @example
     *
     * _.isTypedArray(new Uint8Array);
     * // => true
     *
     * _.isTypedArray([]);
     * // => false
     */
    var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;

    /**
     * Checks if `value` is `undefined`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
     * @example
     *
     * _.isUndefined(void 0);
     * // => true
     *
     * _.isUndefined(null);
     * // => false
     */
    function isUndefined(value) {
      return value === undefined;
    }

    /**
     * Checks if `value` is classified as a `WeakMap` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
     * @example
     *
     * _.isWeakMap(new WeakMap);
     * // => true
     *
     * _.isWeakMap(new Map);
     * // => false
     */
    function isWeakMap(value) {
      return isObjectLike(value) && getTag(value) == weakMapTag;
    }

    /**
     * Checks if `value` is classified as a `WeakSet` object.
     *
     * @static
     * @memberOf _
     * @since 4.3.0
     * @category Lang
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
     * @example
     *
     * _.isWeakSet(new WeakSet);
     * // => true
     *
     * _.isWeakSet(new Set);
     * // => false
     */
    function isWeakSet(value) {
      return isObjectLike(value) && baseGetTag(value) == weakSetTag;
    }

    /**
     * Checks if `value` is less than `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than `other`,
     *  else `false`.
     * @see _.gt
     * @example
     *
     * _.lt(1, 3);
     * // => true
     *
     * _.lt(3, 3);
     * // => false
     *
     * _.lt(3, 1);
     * // => false
     */
    var lt = createRelationalOperation(baseLt);

    /**
     * Checks if `value` is less than or equal to `other`.
     *
     * @static
     * @memberOf _
     * @since 3.9.0
     * @category Lang
     * @param {*} value The value to compare.
     * @param {*} other The other value to compare.
     * @returns {boolean} Returns `true` if `value` is less than or equal to
     *  `other`, else `false`.
     * @see _.gte
     * @example
     *
     * _.lte(1, 3);
     * // => true
     *
     * _.lte(3, 3);
     * // => true
     *
     * _.lte(3, 1);
     * // => false
     */
    var lte = createRelationalOperation(function(value, other) {
      return value <= other;
    });

    /**
     * Converts `value` to an array.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {Array} Returns the converted array.
     * @example
     *
     * _.toArray({ 'a': 1, 'b': 2 });
     * // => [1, 2]
     *
     * _.toArray('abc');
     * // => ['a', 'b', 'c']
     *
     * _.toArray(1);
     * // => []
     *
     * _.toArray(null);
     * // => []
     */
    function toArray(value) {
      if (!value) {
        return [];
      }
      if (isArrayLike(value)) {
        return isString(value) ? stringToArray(value) : copyArray(value);
      }
      if (symIterator && value[symIterator]) {
        return iteratorToArray(value[symIterator]());
      }
      var tag = getTag(value),
          func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);

      return func(value);
    }

    /**
     * Converts `value` to a finite number.
     *
     * @static
     * @memberOf _
     * @since 4.12.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted number.
     * @example
     *
     * _.toFinite(3.2);
     * // => 3.2
     *
     * _.toFinite(Number.MIN_VALUE);
     * // => 5e-324
     *
     * _.toFinite(Infinity);
     * // => 1.7976931348623157e+308
     *
     * _.toFinite('3.2');
     * // => 3.2
     */
    function toFinite(value) {
      if (!value) {
        return value === 0 ? value : 0;
      }
      value = toNumber(value);
      if (value === INFINITY || value === -INFINITY) {
        var sign = (value < 0 ? -1 : 1);
        return sign * MAX_INTEGER;
      }
      return value === value ? value : 0;
    }

    /**
     * Converts `value` to an integer.
     *
     * **Note:** This method is loosely based on
     * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.toInteger(3.2);
     * // => 3
     *
     * _.toInteger(Number.MIN_VALUE);
     * // => 0
     *
     * _.toInteger(Infinity);
     * // => 1.7976931348623157e+308
     *
     * _.toInteger('3.2');
     * // => 3
     */
    function toInteger(value) {
      var result = toFinite(value),
          remainder = result % 1;

      return result === result ? (remainder ? result - remainder : result) : 0;
    }

    /**
     * Converts `value` to an integer suitable for use as the length of an
     * array-like object.
     *
     * **Note:** This method is based on
     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.toLength(3.2);
     * // => 3
     *
     * _.toLength(Number.MIN_VALUE);
     * // => 0
     *
     * _.toLength(Infinity);
     * // => 4294967295
     *
     * _.toLength('3.2');
     * // => 3
     */
    function toLength(value) {
      return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
    }

    /**
     * Converts `value` to a number.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to process.
     * @returns {number} Returns the number.
     * @example
     *
     * _.toNumber(3.2);
     * // => 3.2
     *
     * _.toNumber(Number.MIN_VALUE);
     * // => 5e-324
     *
     * _.toNumber(Infinity);
     * // => Infinity
     *
     * _.toNumber('3.2');
     * // => 3.2
     */
    function toNumber(value) {
      if (typeof value == 'number') {
        return value;
      }
      if (isSymbol(value)) {
        return NAN;
      }
      if (isObject(value)) {
        var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
        value = isObject(other) ? (other + '') : other;
      }
      if (typeof value != 'string') {
        return value === 0 ? value : +value;
      }
      value = value.replace(reTrim, '');
      var isBinary = reIsBinary.test(value);
      return (isBinary || reIsOctal.test(value))
        ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
        : (reIsBadHex.test(value) ? NAN : +value);
    }

    /**
     * Converts `value` to a plain object flattening inherited enumerable string
     * keyed properties of `value` to own properties of the plain object.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {Object} Returns the converted plain object.
     * @example
     *
     * function Foo() {
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.assign({ 'a': 1 }, new Foo);
     * // => { 'a': 1, 'b': 2 }
     *
     * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
     * // => { 'a': 1, 'b': 2, 'c': 3 }
     */
    function toPlainObject(value) {
      return copyObject(value, keysIn(value));
    }

    /**
     * Converts `value` to a safe integer. A safe integer can be compared and
     * represented correctly.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.toSafeInteger(3.2);
     * // => 3
     *
     * _.toSafeInteger(Number.MIN_VALUE);
     * // => 0
     *
     * _.toSafeInteger(Infinity);
     * // => 9007199254740991
     *
     * _.toSafeInteger('3.2');
     * // => 3
     */
    function toSafeInteger(value) {
      return value
        ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
        : (value === 0 ? value : 0);
    }

    /**
     * Converts `value` to a string. An empty string is returned for `null`
     * and `undefined` values. The sign of `-0` is preserved.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Lang
     * @param {*} value The value to convert.
     * @returns {string} Returns the converted string.
     * @example
     *
     * _.toString(null);
     * // => ''
     *
     * _.toString(-0);
     * // => '-0'
     *
     * _.toString([1, 2, 3]);
     * // => '1,2,3'
     */
    function toString(value) {
      return value == null ? '' : baseToString(value);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Assigns own enumerable string keyed properties of source objects to the
     * destination object. Source objects are applied from left to right.
     * Subsequent sources overwrite property assignments of previous sources.
     *
     * **Note:** This method mutates `object` and is loosely based on
     * [`Object.assign`](https://mdn.io/Object/assign).
     *
     * @static
     * @memberOf _
     * @since 0.10.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.assignIn
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     * }
     *
     * function Bar() {
     *   this.c = 3;
     * }
     *
     * Foo.prototype.b = 2;
     * Bar.prototype.d = 4;
     *
     * _.assign({ 'a': 0 }, new Foo, new Bar);
     * // => { 'a': 1, 'c': 3 }
     */
    var assign = createAssigner(function(object, source) {
      if (isPrototype(source) || isArrayLike(source)) {
        copyObject(source, keys(source), object);
        return;
      }
      for (var key in source) {
        if (hasOwnProperty.call(source, key)) {
          assignValue(object, key, source[key]);
        }
      }
    });

    /**
     * This method is like `_.assign` except that it iterates over own and
     * inherited source properties.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias extend
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.assign
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     * }
     *
     * function Bar() {
     *   this.c = 3;
     * }
     *
     * Foo.prototype.b = 2;
     * Bar.prototype.d = 4;
     *
     * _.assignIn({ 'a': 0 }, new Foo, new Bar);
     * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
     */
    var assignIn = createAssigner(function(object, source) {
      copyObject(source, keysIn(source), object);
    });

    /**
     * This method is like `_.assignIn` except that it accepts `customizer`
     * which is invoked to produce the assigned values. If `customizer` returns
     * `undefined`, assignment is handled by the method instead. The `customizer`
     * is invoked with five arguments: (objValue, srcValue, key, object, source).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias extendWith
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} sources The source objects.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @see _.assignWith
     * @example
     *
     * function customizer(objValue, srcValue) {
     *   return _.isUndefined(objValue) ? srcValue : objValue;
     * }
     *
     * var defaults = _.partialRight(_.assignInWith, customizer);
     *
     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
     * // => { 'a': 1, 'b': 2 }
     */
    var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
      copyObject(source, keysIn(source), object, customizer);
    });

    /**
     * This method is like `_.assign` except that it accepts `customizer`
     * which is invoked to produce the assigned values. If `customizer` returns
     * `undefined`, assignment is handled by the method instead. The `customizer`
     * is invoked with five arguments: (objValue, srcValue, key, object, source).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} sources The source objects.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @see _.assignInWith
     * @example
     *
     * function customizer(objValue, srcValue) {
     *   return _.isUndefined(objValue) ? srcValue : objValue;
     * }
     *
     * var defaults = _.partialRight(_.assignWith, customizer);
     *
     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
     * // => { 'a': 1, 'b': 2 }
     */
    var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
      copyObject(source, keys(source), object, customizer);
    });

    /**
     * Creates an array of values corresponding to `paths` of `object`.
     *
     * @static
     * @memberOf _
     * @since 1.0.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {...(string|string[])} [paths] The property paths to pick.
     * @returns {Array} Returns the picked values.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
     *
     * _.at(object, ['a[0].b.c', 'a[1]']);
     * // => [3, 4]
     */
    var at = flatRest(baseAt);

    /**
     * Creates an object that inherits from the `prototype` object. If a
     * `properties` object is given, its own enumerable string keyed properties
     * are assigned to the created object.
     *
     * @static
     * @memberOf _
     * @since 2.3.0
     * @category Object
     * @param {Object} prototype The object to inherit from.
     * @param {Object} [properties] The properties to assign to the object.
     * @returns {Object} Returns the new object.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * function Circle() {
     *   Shape.call(this);
     * }
     *
     * Circle.prototype = _.create(Shape.prototype, {
     *   'constructor': Circle
     * });
     *
     * var circle = new Circle;
     * circle instanceof Circle;
     * // => true
     *
     * circle instanceof Shape;
     * // => true
     */
    function create(prototype, properties) {
      var result = baseCreate(prototype);
      return properties == null ? result : baseAssign(result, properties);
    }

    /**
     * Assigns own and inherited enumerable string keyed properties of source
     * objects to the destination object for all destination properties that
     * resolve to `undefined`. Source objects are applied from left to right.
     * Once a property is set, additional values of the same property are ignored.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.defaultsDeep
     * @example
     *
     * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
     * // => { 'a': 1, 'b': 2 }
     */
    var defaults = baseRest(function(args) {
      args.push(undefined, customDefaultsAssignIn);
      return apply(assignInWith, undefined, args);
    });

    /**
     * This method is like `_.defaults` except that it recursively assigns
     * default properties.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @see _.defaults
     * @example
     *
     * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
     * // => { 'a': { 'b': 2, 'c': 3 } }
     */
    var defaultsDeep = baseRest(function(args) {
      args.push(undefined, customDefaultsMerge);
      return apply(mergeWith, undefined, args);
    });

    /**
     * This method is like `_.find` except that it returns the key of the first
     * element `predicate` returns truthy for instead of the element itself.
     *
     * @static
     * @memberOf _
     * @since 1.1.0
     * @category Object
     * @param {Object} object The object to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {string|undefined} Returns the key of the matched element,
     *  else `undefined`.
     * @example
     *
     * var users = {
     *   'barney':  { 'age': 36, 'active': true },
     *   'fred':    { 'age': 40, 'active': false },
     *   'pebbles': { 'age': 1,  'active': true }
     * };
     *
     * _.findKey(users, function(o) { return o.age < 40; });
     * // => 'barney' (iteration order is not guaranteed)
     *
     * // The `_.matches` iteratee shorthand.
     * _.findKey(users, { 'age': 1, 'active': true });
     * // => 'pebbles'
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findKey(users, ['active', false]);
     * // => 'fred'
     *
     * // The `_.property` iteratee shorthand.
     * _.findKey(users, 'active');
     * // => 'barney'
     */
    function findKey(object, predicate) {
      return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
    }

    /**
     * This method is like `_.findKey` except that it iterates over elements of
     * a collection in the opposite order.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Object
     * @param {Object} object The object to inspect.
     * @param {Function} [predicate=_.identity] The function invoked per iteration.
     * @returns {string|undefined} Returns the key of the matched element,
     *  else `undefined`.
     * @example
     *
     * var users = {
     *   'barney':  { 'age': 36, 'active': true },
     *   'fred':    { 'age': 40, 'active': false },
     *   'pebbles': { 'age': 1,  'active': true }
     * };
     *
     * _.findLastKey(users, function(o) { return o.age < 40; });
     * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
     *
     * // The `_.matches` iteratee shorthand.
     * _.findLastKey(users, { 'age': 36, 'active': true });
     * // => 'barney'
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.findLastKey(users, ['active', false]);
     * // => 'fred'
     *
     * // The `_.property` iteratee shorthand.
     * _.findLastKey(users, 'active');
     * // => 'pebbles'
     */
    function findLastKey(object, predicate) {
      return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
    }

    /**
     * Iterates over own and inherited enumerable string keyed properties of an
     * object and invokes `iteratee` for each property. The iteratee is invoked
     * with three arguments: (value, key, object). Iteratee functions may exit
     * iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @since 0.3.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forInRight
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forIn(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
     */
    function forIn(object, iteratee) {
      return object == null
        ? object
        : baseFor(object, getIteratee(iteratee, 3), keysIn);
    }

    /**
     * This method is like `_.forIn` except that it iterates over properties of
     * `object` in the opposite order.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forIn
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forInRight(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
     */
    function forInRight(object, iteratee) {
      return object == null
        ? object
        : baseForRight(object, getIteratee(iteratee, 3), keysIn);
    }

    /**
     * Iterates over own enumerable string keyed properties of an object and
     * invokes `iteratee` for each property. The iteratee is invoked with three
     * arguments: (value, key, object). Iteratee functions may exit iteration
     * early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @since 0.3.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forOwnRight
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forOwn(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
     */
    function forOwn(object, iteratee) {
      return object && baseForOwn(object, getIteratee(iteratee, 3));
    }

    /**
     * This method is like `_.forOwn` except that it iterates over properties of
     * `object` in the opposite order.
     *
     * @static
     * @memberOf _
     * @since 2.0.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns `object`.
     * @see _.forOwn
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.forOwnRight(new Foo, function(value, key) {
     *   console.log(key);
     * });
     * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
     */
    function forOwnRight(object, iteratee) {
      return object && baseForOwnRight(object, getIteratee(iteratee, 3));
    }

    /**
     * Creates an array of function property names from own enumerable properties
     * of `object`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns the function names.
     * @see _.functionsIn
     * @example
     *
     * function Foo() {
     *   this.a = _.constant('a');
     *   this.b = _.constant('b');
     * }
     *
     * Foo.prototype.c = _.constant('c');
     *
     * _.functions(new Foo);
     * // => ['a', 'b']
     */
    function functions(object) {
      return object == null ? [] : baseFunctions(object, keys(object));
    }

    /**
     * Creates an array of function property names from own and inherited
     * enumerable properties of `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns the function names.
     * @see _.functions
     * @example
     *
     * function Foo() {
     *   this.a = _.constant('a');
     *   this.b = _.constant('b');
     * }
     *
     * Foo.prototype.c = _.constant('c');
     *
     * _.functionsIn(new Foo);
     * // => ['a', 'b', 'c']
     */
    function functionsIn(object) {
      return object == null ? [] : baseFunctions(object, keysIn(object));
    }

    /**
     * Gets the value at `path` of `object`. If the resolved value is
     * `undefined`, the `defaultValue` is returned in its place.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to get.
     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.get(object, 'a[0].b.c');
     * // => 3
     *
     * _.get(object, ['a', '0', 'b', 'c']);
     * // => 3
     *
     * _.get(object, 'a.b.c', 'default');
     * // => 'default'
     */
    function get(object, path, defaultValue) {
      var result = object == null ? undefined : baseGet(object, path);
      return result === undefined ? defaultValue : result;
    }

    /**
     * Checks if `path` is a direct property of `object`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path to check.
     * @returns {boolean} Returns `true` if `path` exists, else `false`.
     * @example
     *
     * var object = { 'a': { 'b': 2 } };
     * var other = _.create({ 'a': _.create({ 'b': 2 }) });
     *
     * _.has(object, 'a');
     * // => true
     *
     * _.has(object, 'a.b');
     * // => true
     *
     * _.has(object, ['a', 'b']);
     * // => true
     *
     * _.has(other, 'a');
     * // => false
     */
    function has(object, path) {
      return object != null && hasPath(object, path, baseHas);
    }

    /**
     * Checks if `path` is a direct or inherited property of `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path to check.
     * @returns {boolean} Returns `true` if `path` exists, else `false`.
     * @example
     *
     * var object = _.create({ 'a': _.create({ 'b': 2 }) });
     *
     * _.hasIn(object, 'a');
     * // => true
     *
     * _.hasIn(object, 'a.b');
     * // => true
     *
     * _.hasIn(object, ['a', 'b']);
     * // => true
     *
     * _.hasIn(object, 'b');
     * // => false
     */
    function hasIn(object, path) {
      return object != null && hasPath(object, path, baseHasIn);
    }

    /**
     * Creates an object composed of the inverted keys and values of `object`.
     * If `object` contains duplicate values, subsequent values overwrite
     * property assignments of previous values.
     *
     * @static
     * @memberOf _
     * @since 0.7.0
     * @category Object
     * @param {Object} object The object to invert.
     * @returns {Object} Returns the new inverted object.
     * @example
     *
     * var object = { 'a': 1, 'b': 2, 'c': 1 };
     *
     * _.invert(object);
     * // => { '1': 'c', '2': 'b' }
     */
    var invert = createInverter(function(result, value, key) {
      result[value] = key;
    }, constant(identity));

    /**
     * This method is like `_.invert` except that the inverted object is generated
     * from the results of running each element of `object` thru `iteratee`. The
     * corresponding inverted value of each inverted key is an array of keys
     * responsible for generating the inverted value. The iteratee is invoked
     * with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.1.0
     * @category Object
     * @param {Object} object The object to invert.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {Object} Returns the new inverted object.
     * @example
     *
     * var object = { 'a': 1, 'b': 2, 'c': 1 };
     *
     * _.invertBy(object);
     * // => { '1': ['a', 'c'], '2': ['b'] }
     *
     * _.invertBy(object, function(value) {
     *   return 'group' + value;
     * });
     * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
     */
    var invertBy = createInverter(function(result, value, key) {
      if (hasOwnProperty.call(result, value)) {
        result[value].push(key);
      } else {
        result[value] = [key];
      }
    }, getIteratee);

    /**
     * Invokes the method at `path` of `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the method to invoke.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {*} Returns the result of the invoked method.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
     *
     * _.invoke(object, 'a[0].b.c.slice', 1, 3);
     * // => [2, 3]
     */
    var invoke = baseRest(baseInvoke);

    /**
     * Creates an array of the own enumerable property names of `object`.
     *
     * **Note:** Non-object values are coerced to objects. See the
     * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
     * for more details.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.keys(new Foo);
     * // => ['a', 'b'] (iteration order is not guaranteed)
     *
     * _.keys('hi');
     * // => ['0', '1']
     */
    function keys(object) {
      return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
    }

    /**
     * Creates an array of the own and inherited enumerable property names of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property names.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.keysIn(new Foo);
     * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
     */
    function keysIn(object) {
      return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
    }

    /**
     * The opposite of `_.mapValues`; this method creates an object with the
     * same values as `object` and keys generated by running each own enumerable
     * string keyed property of `object` thru `iteratee`. The iteratee is invoked
     * with three arguments: (value, key, object).
     *
     * @static
     * @memberOf _
     * @since 3.8.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns the new mapped object.
     * @see _.mapValues
     * @example
     *
     * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
     *   return key + value;
     * });
     * // => { 'a1': 1, 'b2': 2 }
     */
    function mapKeys(object, iteratee) {
      var result = {};
      iteratee = getIteratee(iteratee, 3);

      baseForOwn(object, function(value, key, object) {
        baseAssignValue(result, iteratee(value, key, object), value);
      });
      return result;
    }

    /**
     * Creates an object with the same keys as `object` and values generated
     * by running each own enumerable string keyed property of `object` thru
     * `iteratee`. The iteratee is invoked with three arguments:
     * (value, key, object).
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Object} Returns the new mapped object.
     * @see _.mapKeys
     * @example
     *
     * var users = {
     *   'fred':    { 'user': 'fred',    'age': 40 },
     *   'pebbles': { 'user': 'pebbles', 'age': 1 }
     * };
     *
     * _.mapValues(users, function(o) { return o.age; });
     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
     *
     * // The `_.property` iteratee shorthand.
     * _.mapValues(users, 'age');
     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
     */
    function mapValues(object, iteratee) {
      var result = {};
      iteratee = getIteratee(iteratee, 3);

      baseForOwn(object, function(value, key, object) {
        baseAssignValue(result, key, iteratee(value, key, object));
      });
      return result;
    }

    /**
     * This method is like `_.assign` except that it recursively merges own and
     * inherited enumerable string keyed properties of source objects into the
     * destination object. Source properties that resolve to `undefined` are
     * skipped if a destination value exists. Array and plain object properties
     * are merged recursively. Other objects and value types are overridden by
     * assignment. Source objects are applied from left to right. Subsequent
     * sources overwrite property assignments of previous sources.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 0.5.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} [sources] The source objects.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = {
     *   'a': [{ 'b': 2 }, { 'd': 4 }]
     * };
     *
     * var other = {
     *   'a': [{ 'c': 3 }, { 'e': 5 }]
     * };
     *
     * _.merge(object, other);
     * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
     */
    var merge = createAssigner(function(object, source, srcIndex) {
      baseMerge(object, source, srcIndex);
    });

    /**
     * This method is like `_.merge` except that it accepts `customizer` which
     * is invoked to produce the merged values of the destination and source
     * properties. If `customizer` returns `undefined`, merging is handled by the
     * method instead. The `customizer` is invoked with six arguments:
     * (objValue, srcValue, key, object, source, stack).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The destination object.
     * @param {...Object} sources The source objects.
     * @param {Function} customizer The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function customizer(objValue, srcValue) {
     *   if (_.isArray(objValue)) {
     *     return objValue.concat(srcValue);
     *   }
     * }
     *
     * var object = { 'a': [1], 'b': [2] };
     * var other = { 'a': [3], 'b': [4] };
     *
     * _.mergeWith(object, other, customizer);
     * // => { 'a': [1, 3], 'b': [2, 4] }
     */
    var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
      baseMerge(object, source, srcIndex, customizer);
    });

    /**
     * The opposite of `_.pick`; this method creates an object composed of the
     * own and inherited enumerable property paths of `object` that are not omitted.
     *
     * **Note:** This method is considerably slower than `_.pick`.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The source object.
     * @param {...(string|string[])} [paths] The property paths to omit.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.omit(object, ['a', 'c']);
     * // => { 'b': '2' }
     */
    var omit = flatRest(function(object, paths) {
      var result = {};
      if (object == null) {
        return result;
      }
      var isDeep = false;
      paths = arrayMap(paths, function(path) {
        path = castPath(path, object);
        isDeep || (isDeep = path.length > 1);
        return path;
      });
      copyObject(object, getAllKeysIn(object), result);
      if (isDeep) {
        result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
      }
      var length = paths.length;
      while (length--) {
        baseUnset(result, paths[length]);
      }
      return result;
    });

    /**
     * The opposite of `_.pickBy`; this method creates an object composed of
     * the own and inherited enumerable string keyed properties of `object` that
     * `predicate` doesn't return truthy for. The predicate is invoked with two
     * arguments: (value, key).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The source object.
     * @param {Function} [predicate=_.identity] The function invoked per property.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.omitBy(object, _.isNumber);
     * // => { 'b': '2' }
     */
    function omitBy(object, predicate) {
      return pickBy(object, negate(getIteratee(predicate)));
    }

    /**
     * Creates an object composed of the picked `object` properties.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The source object.
     * @param {...(string|string[])} [paths] The property paths to pick.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.pick(object, ['a', 'c']);
     * // => { 'a': 1, 'c': 3 }
     */
    var pick = flatRest(function(object, paths) {
      return object == null ? {} : basePick(object, paths);
    });

    /**
     * Creates an object composed of the `object` properties `predicate` returns
     * truthy for. The predicate is invoked with two arguments: (value, key).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The source object.
     * @param {Function} [predicate=_.identity] The function invoked per property.
     * @returns {Object} Returns the new object.
     * @example
     *
     * var object = { 'a': 1, 'b': '2', 'c': 3 };
     *
     * _.pickBy(object, _.isNumber);
     * // => { 'a': 1, 'c': 3 }
     */
    function pickBy(object, predicate) {
      if (object == null) {
        return {};
      }
      var props = arrayMap(getAllKeysIn(object), function(prop) {
        return [prop];
      });
      predicate = getIteratee(predicate);
      return basePickBy(object, props, function(value, path) {
        return predicate(value, path[0]);
      });
    }

    /**
     * This method is like `_.get` except that if the resolved value is a
     * function it's invoked with the `this` binding of its parent object and
     * its result is returned.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @param {Array|string} path The path of the property to resolve.
     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
     *
     * _.result(object, 'a[0].b.c1');
     * // => 3
     *
     * _.result(object, 'a[0].b.c2');
     * // => 4
     *
     * _.result(object, 'a[0].b.c3', 'default');
     * // => 'default'
     *
     * _.result(object, 'a[0].b.c3', _.constant('default'));
     * // => 'default'
     */
    function result(object, path, defaultValue) {
      path = castPath(path, object);

      var index = -1,
          length = path.length;

      // Ensure the loop is entered when path is empty.
      if (!length) {
        length = 1;
        object = undefined;
      }
      while (++index < length) {
        var value = object == null ? undefined : object[toKey(path[index])];
        if (value === undefined) {
          index = length;
          value = defaultValue;
        }
        object = isFunction(value) ? value.call(object) : value;
      }
      return object;
    }

    /**
     * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
     * it's created. Arrays are created for missing index properties while objects
     * are created for all other missing properties. Use `_.setWith` to customize
     * `path` creation.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {*} value The value to set.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.set(object, 'a[0].b.c', 4);
     * console.log(object.a[0].b.c);
     * // => 4
     *
     * _.set(object, ['x', '0', 'y', 'z'], 5);
     * console.log(object.x[0].y.z);
     * // => 5
     */
    function set(object, path, value) {
      return object == null ? object : baseSet(object, path, value);
    }

    /**
     * This method is like `_.set` except that it accepts `customizer` which is
     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
     * path creation is handled by the method instead. The `customizer` is invoked
     * with three arguments: (nsValue, key, nsObject).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {*} value The value to set.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = {};
     *
     * _.setWith(object, '[0][1]', 'a', Object);
     * // => { '0': { '1': 'a' } }
     */
    function setWith(object, path, value, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return object == null ? object : baseSet(object, path, value, customizer);
    }

    /**
     * Creates an array of own enumerable string keyed-value pairs for `object`
     * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
     * entries are returned.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias entries
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the key-value pairs.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.toPairs(new Foo);
     * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
     */
    var toPairs = createToPairs(keys);

    /**
     * Creates an array of own and inherited enumerable string keyed-value pairs
     * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
     * or set, its entries are returned.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @alias entriesIn
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the key-value pairs.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.toPairsIn(new Foo);
     * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
     */
    var toPairsIn = createToPairs(keysIn);

    /**
     * An alternative to `_.reduce`; this method transforms `object` to a new
     * `accumulator` object which is the result of running each of its own
     * enumerable string keyed properties thru `iteratee`, with each invocation
     * potentially mutating the `accumulator` object. If `accumulator` is not
     * provided, a new object with the same `[[Prototype]]` will be used. The
     * iteratee is invoked with four arguments: (accumulator, value, key, object).
     * Iteratee functions may exit iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @since 1.3.0
     * @category Object
     * @param {Object} object The object to iterate over.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @param {*} [accumulator] The custom accumulator value.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * _.transform([2, 3, 4], function(result, n) {
     *   result.push(n *= n);
     *   return n % 2 == 0;
     * }, []);
     * // => [4, 9]
     *
     * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
     *   (result[value] || (result[value] = [])).push(key);
     * }, {});
     * // => { '1': ['a', 'c'], '2': ['b'] }
     */
    function transform(object, iteratee, accumulator) {
      var isArr = isArray(object),
          isArrLike = isArr || isBuffer(object) || isTypedArray(object);

      iteratee = getIteratee(iteratee, 4);
      if (accumulator == null) {
        var Ctor = object && object.constructor;
        if (isArrLike) {
          accumulator = isArr ? new Ctor : [];
        }
        else if (isObject(object)) {
          accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
        }
        else {
          accumulator = {};
        }
      }
      (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
        return iteratee(accumulator, value, index, object);
      });
      return accumulator;
    }

    /**
     * Removes the property at `path` of `object`.
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to unset.
     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 7 } }] };
     * _.unset(object, 'a[0].b.c');
     * // => true
     *
     * console.log(object);
     * // => { 'a': [{ 'b': {} }] };
     *
     * _.unset(object, ['a', '0', 'b', 'c']);
     * // => true
     *
     * console.log(object);
     * // => { 'a': [{ 'b': {} }] };
     */
    function unset(object, path) {
      return object == null ? true : baseUnset(object, path);
    }

    /**
     * This method is like `_.set` except that accepts `updater` to produce the
     * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
     * is invoked with one argument: (value).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.6.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {Function} updater The function to produce the updated value.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
     *
     * _.update(object, 'a[0].b.c', function(n) { return n * n; });
     * console.log(object.a[0].b.c);
     * // => 9
     *
     * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
     * console.log(object.x[0].y.z);
     * // => 0
     */
    function update(object, path, updater) {
      return object == null ? object : baseUpdate(object, path, castFunction(updater));
    }

    /**
     * This method is like `_.update` except that it accepts `customizer` which is
     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
     * path creation is handled by the method instead. The `customizer` is invoked
     * with three arguments: (nsValue, key, nsObject).
     *
     * **Note:** This method mutates `object`.
     *
     * @static
     * @memberOf _
     * @since 4.6.0
     * @category Object
     * @param {Object} object The object to modify.
     * @param {Array|string} path The path of the property to set.
     * @param {Function} updater The function to produce the updated value.
     * @param {Function} [customizer] The function to customize assigned values.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var object = {};
     *
     * _.updateWith(object, '[0][1]', _.constant('a'), Object);
     * // => { '0': { '1': 'a' } }
     */
    function updateWith(object, path, updater, customizer) {
      customizer = typeof customizer == 'function' ? customizer : undefined;
      return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
    }

    /**
     * Creates an array of the own enumerable string keyed property values of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property values.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.values(new Foo);
     * // => [1, 2] (iteration order is not guaranteed)
     *
     * _.values('hi');
     * // => ['h', 'i']
     */
    function values(object) {
      return object == null ? [] : baseValues(object, keys(object));
    }

    /**
     * Creates an array of the own and inherited enumerable string keyed property
     * values of `object`.
     *
     * **Note:** Non-object values are coerced to objects.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Object
     * @param {Object} object The object to query.
     * @returns {Array} Returns the array of property values.
     * @example
     *
     * function Foo() {
     *   this.a = 1;
     *   this.b = 2;
     * }
     *
     * Foo.prototype.c = 3;
     *
     * _.valuesIn(new Foo);
     * // => [1, 2, 3] (iteration order is not guaranteed)
     */
    function valuesIn(object) {
      return object == null ? [] : baseValues(object, keysIn(object));
    }

    /*------------------------------------------------------------------------*/

    /**
     * Clamps `number` within the inclusive `lower` and `upper` bounds.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Number
     * @param {number} number The number to clamp.
     * @param {number} [lower] The lower bound.
     * @param {number} upper The upper bound.
     * @returns {number} Returns the clamped number.
     * @example
     *
     * _.clamp(-10, -5, 5);
     * // => -5
     *
     * _.clamp(10, -5, 5);
     * // => 5
     */
    function clamp(number, lower, upper) {
      if (upper === undefined) {
        upper = lower;
        lower = undefined;
      }
      if (upper !== undefined) {
        upper = toNumber(upper);
        upper = upper === upper ? upper : 0;
      }
      if (lower !== undefined) {
        lower = toNumber(lower);
        lower = lower === lower ? lower : 0;
      }
      return baseClamp(toNumber(number), lower, upper);
    }

    /**
     * Checks if `n` is between `start` and up to, but not including, `end`. If
     * `end` is not specified, it's set to `start` with `start` then set to `0`.
     * If `start` is greater than `end` the params are swapped to support
     * negative ranges.
     *
     * @static
     * @memberOf _
     * @since 3.3.0
     * @category Number
     * @param {number} number The number to check.
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
     * @see _.range, _.rangeRight
     * @example
     *
     * _.inRange(3, 2, 4);
     * // => true
     *
     * _.inRange(4, 8);
     * // => true
     *
     * _.inRange(4, 2);
     * // => false
     *
     * _.inRange(2, 2);
     * // => false
     *
     * _.inRange(1.2, 2);
     * // => true
     *
     * _.inRange(5.2, 4);
     * // => false
     *
     * _.inRange(-3, -2, -6);
     * // => true
     */
    function inRange(number, start, end) {
      start = toFinite(start);
      if (end === undefined) {
        end = start;
        start = 0;
      } else {
        end = toFinite(end);
      }
      number = toNumber(number);
      return baseInRange(number, start, end);
    }

    /**
     * Produces a random number between the inclusive `lower` and `upper` bounds.
     * If only one argument is provided a number between `0` and the given number
     * is returned. If `floating` is `true`, or either `lower` or `upper` are
     * floats, a floating-point number is returned instead of an integer.
     *
     * **Note:** JavaScript follows the IEEE-754 standard for resolving
     * floating-point values which can produce unexpected results.
     *
     * @static
     * @memberOf _
     * @since 0.7.0
     * @category Number
     * @param {number} [lower=0] The lower bound.
     * @param {number} [upper=1] The upper bound.
     * @param {boolean} [floating] Specify returning a floating-point number.
     * @returns {number} Returns the random number.
     * @example
     *
     * _.random(0, 5);
     * // => an integer between 0 and 5
     *
     * _.random(5);
     * // => also an integer between 0 and 5
     *
     * _.random(5, true);
     * // => a floating-point number between 0 and 5
     *
     * _.random(1.2, 5.2);
     * // => a floating-point number between 1.2 and 5.2
     */
    function random(lower, upper, floating) {
      if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
        upper = floating = undefined;
      }
      if (floating === undefined) {
        if (typeof upper == 'boolean') {
          floating = upper;
          upper = undefined;
        }
        else if (typeof lower == 'boolean') {
          floating = lower;
          lower = undefined;
        }
      }
      if (lower === undefined && upper === undefined) {
        lower = 0;
        upper = 1;
      }
      else {
        lower = toFinite(lower);
        if (upper === undefined) {
          upper = lower;
          lower = 0;
        } else {
          upper = toFinite(upper);
        }
      }
      if (lower > upper) {
        var temp = lower;
        lower = upper;
        upper = temp;
      }
      if (floating || lower % 1 || upper % 1) {
        var rand = nativeRandom();
        return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
      }
      return baseRandom(lower, upper);
    }

    /*------------------------------------------------------------------------*/

    /**
     * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the camel cased string.
     * @example
     *
     * _.camelCase('Foo Bar');
     * // => 'fooBar'
     *
     * _.camelCase('--foo-bar--');
     * // => 'fooBar'
     *
     * _.camelCase('__FOO_BAR__');
     * // => 'fooBar'
     */
    var camelCase = createCompounder(function(result, word, index) {
      word = word.toLowerCase();
      return result + (index ? capitalize(word) : word);
    });

    /**
     * Converts the first character of `string` to upper case and the remaining
     * to lower case.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to capitalize.
     * @returns {string} Returns the capitalized string.
     * @example
     *
     * _.capitalize('FRED');
     * // => 'Fred'
     */
    function capitalize(string) {
      return upperFirst(toString(string).toLowerCase());
    }

    /**
     * Deburrs `string` by converting
     * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
     * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
     * letters to basic Latin letters and removing
     * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to deburr.
     * @returns {string} Returns the deburred string.
     * @example
     *
     * _.deburr('déjà vu');
     * // => 'deja vu'
     */
    function deburr(string) {
      string = toString(string);
      return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
    }

    /**
     * Checks if `string` ends with the given target string.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to inspect.
     * @param {string} [target] The string to search for.
     * @param {number} [position=string.length] The position to search up to.
     * @returns {boolean} Returns `true` if `string` ends with `target`,
     *  else `false`.
     * @example
     *
     * _.endsWith('abc', 'c');
     * // => true
     *
     * _.endsWith('abc', 'b');
     * // => false
     *
     * _.endsWith('abc', 'b', 2);
     * // => true
     */
    function endsWith(string, target, position) {
      string = toString(string);
      target = baseToString(target);

      var length = string.length;
      position = position === undefined
        ? length
        : baseClamp(toInteger(position), 0, length);

      var end = position;
      position -= target.length;
      return position >= 0 && string.slice(position, end) == target;
    }

    /**
     * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
     * corresponding HTML entities.
     *
     * **Note:** No other characters are escaped. To escape additional
     * characters use a third-party library like [_he_](https://mths.be/he).
     *
     * Though the ">" character is escaped for symmetry, characters like
     * ">" and "/" don't need escaping in HTML and have no special meaning
     * unless they're part of a tag or unquoted attribute value. See
     * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
     * (under "semi-related fun fact") for more details.
     *
     * When working with HTML you should always
     * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
     * XSS vectors.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category String
     * @param {string} [string=''] The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escape('fred, barney, & pebbles');
     * // => 'fred, barney, &amp; pebbles'
     */
    function escape(string) {
      string = toString(string);
      return (string && reHasUnescapedHtml.test(string))
        ? string.replace(reUnescapedHtml, escapeHtmlChar)
        : string;
    }

    /**
     * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
     * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escapeRegExp('[lodash](https://lodash.com/)');
     * // => '\[lodash\]\(https://lodash\.com/\)'
     */
    function escapeRegExp(string) {
      string = toString(string);
      return (string && reHasRegExpChar.test(string))
        ? string.replace(reRegExpChar, '\\$&')
        : string;
    }

    /**
     * Converts `string` to
     * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the kebab cased string.
     * @example
     *
     * _.kebabCase('Foo Bar');
     * // => 'foo-bar'
     *
     * _.kebabCase('fooBar');
     * // => 'foo-bar'
     *
     * _.kebabCase('__FOO_BAR__');
     * // => 'foo-bar'
     */
    var kebabCase = createCompounder(function(result, word, index) {
      return result + (index ? '-' : '') + word.toLowerCase();
    });

    /**
     * Converts `string`, as space separated words, to lower case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the lower cased string.
     * @example
     *
     * _.lowerCase('--Foo-Bar--');
     * // => 'foo bar'
     *
     * _.lowerCase('fooBar');
     * // => 'foo bar'
     *
     * _.lowerCase('__FOO_BAR__');
     * // => 'foo bar'
     */
    var lowerCase = createCompounder(function(result, word, index) {
      return result + (index ? ' ' : '') + word.toLowerCase();
    });

    /**
     * Converts the first character of `string` to lower case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the converted string.
     * @example
     *
     * _.lowerFirst('Fred');
     * // => 'fred'
     *
     * _.lowerFirst('FRED');
     * // => 'fRED'
     */
    var lowerFirst = createCaseFirst('toLowerCase');

    /**
     * Pads `string` on the left and right sides if it's shorter than `length`.
     * Padding characters are truncated if they can't be evenly divided by `length`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.pad('abc', 8);
     * // => '  abc   '
     *
     * _.pad('abc', 8, '_-');
     * // => '_-abc_-_'
     *
     * _.pad('abc', 3);
     * // => 'abc'
     */
    function pad(string, length, chars) {
      string = toString(string);
      length = toInteger(length);

      var strLength = length ? stringSize(string) : 0;
      if (!length || strLength >= length) {
        return string;
      }
      var mid = (length - strLength) / 2;
      return (
        createPadding(nativeFloor(mid), chars) +
        string +
        createPadding(nativeCeil(mid), chars)
      );
    }

    /**
     * Pads `string` on the right side if it's shorter than `length`. Padding
     * characters are truncated if they exceed `length`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.padEnd('abc', 6);
     * // => 'abc   '
     *
     * _.padEnd('abc', 6, '_-');
     * // => 'abc_-_'
     *
     * _.padEnd('abc', 3);
     * // => 'abc'
     */
    function padEnd(string, length, chars) {
      string = toString(string);
      length = toInteger(length);

      var strLength = length ? stringSize(string) : 0;
      return (length && strLength < length)
        ? (string + createPadding(length - strLength, chars))
        : string;
    }

    /**
     * Pads `string` on the left side if it's shorter than `length`. Padding
     * characters are truncated if they exceed `length`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to pad.
     * @param {number} [length=0] The padding length.
     * @param {string} [chars=' '] The string used as padding.
     * @returns {string} Returns the padded string.
     * @example
     *
     * _.padStart('abc', 6);
     * // => '   abc'
     *
     * _.padStart('abc', 6, '_-');
     * // => '_-_abc'
     *
     * _.padStart('abc', 3);
     * // => 'abc'
     */
    function padStart(string, length, chars) {
      string = toString(string);
      length = toInteger(length);

      var strLength = length ? stringSize(string) : 0;
      return (length && strLength < length)
        ? (createPadding(length - strLength, chars) + string)
        : string;
    }

    /**
     * Converts `string` to an integer of the specified radix. If `radix` is
     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
     * hexadecimal, in which case a `radix` of `16` is used.
     *
     * **Note:** This method aligns with the
     * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
     *
     * @static
     * @memberOf _
     * @since 1.1.0
     * @category String
     * @param {string} string The string to convert.
     * @param {number} [radix=10] The radix to interpret `value` by.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {number} Returns the converted integer.
     * @example
     *
     * _.parseInt('08');
     * // => 8
     *
     * _.map(['6', '08', '10'], _.parseInt);
     * // => [6, 8, 10]
     */
    function parseInt(string, radix, guard) {
      if (guard || radix == null) {
        radix = 0;
      } else if (radix) {
        radix = +radix;
      }
      return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
    }

    /**
     * Repeats the given string `n` times.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to repeat.
     * @param {number} [n=1] The number of times to repeat the string.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the repeated string.
     * @example
     *
     * _.repeat('*', 3);
     * // => '***'
     *
     * _.repeat('abc', 2);
     * // => 'abcabc'
     *
     * _.repeat('abc', 0);
     * // => ''
     */
    function repeat(string, n, guard) {
      if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
        n = 1;
      } else {
        n = toInteger(n);
      }
      return baseRepeat(toString(string), n);
    }

    /**
     * Replaces matches for `pattern` in `string` with `replacement`.
     *
     * **Note:** This method is based on
     * [`String#replace`](https://mdn.io/String/replace).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to modify.
     * @param {RegExp|string} pattern The pattern to replace.
     * @param {Function|string} replacement The match replacement.
     * @returns {string} Returns the modified string.
     * @example
     *
     * _.replace('Hi Fred', 'Fred', 'Barney');
     * // => 'Hi Barney'
     */
    function replace() {
      var args = arguments,
          string = toString(args[0]);

      return args.length < 3 ? string : string.replace(args[1], args[2]);
    }

    /**
     * Converts `string` to
     * [snake case](https://en.wikipedia.org/wiki/Snake_case).
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the snake cased string.
     * @example
     *
     * _.snakeCase('Foo Bar');
     * // => 'foo_bar'
     *
     * _.snakeCase('fooBar');
     * // => 'foo_bar'
     *
     * _.snakeCase('--FOO-BAR--');
     * // => 'foo_bar'
     */
    var snakeCase = createCompounder(function(result, word, index) {
      return result + (index ? '_' : '') + word.toLowerCase();
    });

    /**
     * Splits `string` by `separator`.
     *
     * **Note:** This method is based on
     * [`String#split`](https://mdn.io/String/split).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to split.
     * @param {RegExp|string} separator The separator pattern to split by.
     * @param {number} [limit] The length to truncate results to.
     * @returns {Array} Returns the string segments.
     * @example
     *
     * _.split('a-b-c', '-', 2);
     * // => ['a', 'b']
     */
    function split(string, separator, limit) {
      if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
        separator = limit = undefined;
      }
      limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
      if (!limit) {
        return [];
      }
      string = toString(string);
      if (string && (
            typeof separator == 'string' ||
            (separator != null && !isRegExp(separator))
          )) {
        separator = baseToString(separator);
        if (!separator && hasUnicode(string)) {
          return castSlice(stringToArray(string), 0, limit);
        }
      }
      return string.split(separator, limit);
    }

    /**
     * Converts `string` to
     * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
     *
     * @static
     * @memberOf _
     * @since 3.1.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the start cased string.
     * @example
     *
     * _.startCase('--foo-bar--');
     * // => 'Foo Bar'
     *
     * _.startCase('fooBar');
     * // => 'Foo Bar'
     *
     * _.startCase('__FOO_BAR__');
     * // => 'FOO BAR'
     */
    var startCase = createCompounder(function(result, word, index) {
      return result + (index ? ' ' : '') + upperFirst(word);
    });

    /**
     * Checks if `string` starts with the given target string.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to inspect.
     * @param {string} [target] The string to search for.
     * @param {number} [position=0] The position to search from.
     * @returns {boolean} Returns `true` if `string` starts with `target`,
     *  else `false`.
     * @example
     *
     * _.startsWith('abc', 'a');
     * // => true
     *
     * _.startsWith('abc', 'b');
     * // => false
     *
     * _.startsWith('abc', 'b', 1);
     * // => true
     */
    function startsWith(string, target, position) {
      string = toString(string);
      position = position == null
        ? 0
        : baseClamp(toInteger(position), 0, string.length);

      target = baseToString(target);
      return string.slice(position, position + target.length) == target;
    }

    /**
     * Creates a compiled template function that can interpolate data properties
     * in "interpolate" delimiters, HTML-escape interpolated data properties in
     * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
     * properties may be accessed as free variables in the template. If a setting
     * object is given, it takes precedence over `_.templateSettings` values.
     *
     * **Note:** In the development build `_.template` utilizes
     * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
     * for easier debugging.
     *
     * For more information on precompiling templates see
     * [lodash's custom builds documentation](https://lodash.com/custom-builds).
     *
     * For more information on Chrome extension sandboxes see
     * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category String
     * @param {string} [string=''] The template string.
     * @param {Object} [options={}] The options object.
     * @param {RegExp} [options.escape=_.templateSettings.escape]
     *  The HTML "escape" delimiter.
     * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
     *  The "evaluate" delimiter.
     * @param {Object} [options.imports=_.templateSettings.imports]
     *  An object to import into the template as free variables.
     * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
     *  The "interpolate" delimiter.
     * @param {string} [options.sourceURL='lodash.templateSources[n]']
     *  The sourceURL of the compiled template.
     * @param {string} [options.variable='obj']
     *  The data object variable name.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Function} Returns the compiled template function.
     * @example
     *
     * // Use the "interpolate" delimiter to create a compiled template.
     * var compiled = _.template('hello <%= user %>!');
     * compiled({ 'user': 'fred' });
     * // => 'hello fred!'
     *
     * // Use the HTML "escape" delimiter to escape data property values.
     * var compiled = _.template('<b><%- value %></b>');
     * compiled({ 'value': '<script>' });
     * // => '<b>&lt;script&gt;</b>'
     *
     * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
     * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
     * compiled({ 'users': ['fred', 'barney'] });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // Use the internal `print` function in "evaluate" delimiters.
     * var compiled = _.template('<% print("hello " + user); %>!');
     * compiled({ 'user': 'barney' });
     * // => 'hello barney!'
     *
     * // Use the ES template literal delimiter as an "interpolate" delimiter.
     * // Disable support by replacing the "interpolate" delimiter.
     * var compiled = _.template('hello ${ user }!');
     * compiled({ 'user': 'pebbles' });
     * // => 'hello pebbles!'
     *
     * // Use backslashes to treat delimiters as plain text.
     * var compiled = _.template('<%= "\\<%- value %\\>" %>');
     * compiled({ 'value': 'ignored' });
     * // => '<%- value %>'
     *
     * // Use the `imports` option to import `jQuery` as `jq`.
     * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
     * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
     * compiled({ 'users': ['fred', 'barney'] });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // Use the `sourceURL` option to specify a custom sourceURL for the template.
     * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
     * compiled(data);
     * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
     *
     * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
     * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
     * compiled.source;
     * // => function(data) {
     * //   var __t, __p = '';
     * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
     * //   return __p;
     * // }
     *
     * // Use custom template delimiters.
     * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
     * var compiled = _.template('hello {{ user }}!');
     * compiled({ 'user': 'mustache' });
     * // => 'hello mustache!'
     *
     * // Use the `source` property to inline compiled templates for meaningful
     * // line numbers in error messages and stack traces.
     * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
     *   var JST = {\
     *     "main": ' + _.template(mainText).source + '\
     *   };\
     * ');
     */
    function template(string, options, guard) {
      // Based on John Resig's `tmpl` implementation
      // (http://ejohn.org/blog/javascript-micro-templating/)
      // and Laura Doktorova's doT.js (https://github.com/olado/doT).
      var settings = lodash.templateSettings;

      if (guard && isIterateeCall(string, options, guard)) {
        options = undefined;
      }
      string = toString(string);
      options = assignInWith({}, options, settings, customDefaultsAssignIn);

      var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
          importsKeys = keys(imports),
          importsValues = baseValues(imports, importsKeys);

      var isEscaping,
          isEvaluating,
          index = 0,
          interpolate = options.interpolate || reNoMatch,
          source = "__p += '";

      // Compile the regexp to match each delimiter.
      var reDelimiters = RegExp(
        (options.escape || reNoMatch).source + '|' +
        interpolate.source + '|' +
        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
        (options.evaluate || reNoMatch).source + '|$'
      , 'g');

      // Use a sourceURL for easier debugging.
      var sourceURL = '//# sourceURL=' +
        ('sourceURL' in options
          ? options.sourceURL
          : ('lodash.templateSources[' + (++templateCounter) + ']')
        ) + '\n';

      string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
        interpolateValue || (interpolateValue = esTemplateValue);

        // Escape characters that can't be included in string literals.
        source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);

        // Replace delimiters with snippets.
        if (escapeValue) {
          isEscaping = true;
          source += "' +\n__e(" + escapeValue + ") +\n'";
        }
        if (evaluateValue) {
          isEvaluating = true;
          source += "';\n" + evaluateValue + ";\n__p += '";
        }
        if (interpolateValue) {
          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
        }
        index = offset + match.length;

        // The JS engine embedded in Adobe products needs `match` returned in
        // order to produce the correct `offset` value.
        return match;
      });

      source += "';\n";

      // If `variable` is not specified wrap a with-statement around the generated
      // code to add the data object to the top of the scope chain.
      var variable = options.variable;
      if (!variable) {
        source = 'with (obj) {\n' + source + '\n}\n';
      }
      // Cleanup code by stripping empty strings.
      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
        .replace(reEmptyStringMiddle, '$1')
        .replace(reEmptyStringTrailing, '$1;');

      // Frame code as the function body.
      source = 'function(' + (variable || 'obj') + ') {\n' +
        (variable
          ? ''
          : 'obj || (obj = {});\n'
        ) +
        "var __t, __p = ''" +
        (isEscaping
           ? ', __e = _.escape'
           : ''
        ) +
        (isEvaluating
          ? ', __j = Array.prototype.join;\n' +
            "function print() { __p += __j.call(arguments, '') }\n"
          : ';\n'
        ) +
        source +
        'return __p\n}';

      var result = attempt(function() {
        return Function(importsKeys, sourceURL + 'return ' + source)
          .apply(undefined, importsValues);
      });

      // Provide the compiled function's source by its `toString` method or
      // the `source` property as a convenience for inlining compiled templates.
      result.source = source;
      if (isError(result)) {
        throw result;
      }
      return result;
    }

    /**
     * Converts `string`, as a whole, to lower case just like
     * [String#toLowerCase](https://mdn.io/toLowerCase).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the lower cased string.
     * @example
     *
     * _.toLower('--Foo-Bar--');
     * // => '--foo-bar--'
     *
     * _.toLower('fooBar');
     * // => 'foobar'
     *
     * _.toLower('__FOO_BAR__');
     * // => '__foo_bar__'
     */
    function toLower(value) {
      return toString(value).toLowerCase();
    }

    /**
     * Converts `string`, as a whole, to upper case just like
     * [String#toUpperCase](https://mdn.io/toUpperCase).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the upper cased string.
     * @example
     *
     * _.toUpper('--foo-bar--');
     * // => '--FOO-BAR--'
     *
     * _.toUpper('fooBar');
     * // => 'FOOBAR'
     *
     * _.toUpper('__foo_bar__');
     * // => '__FOO_BAR__'
     */
    function toUpper(value) {
      return toString(value).toUpperCase();
    }

    /**
     * Removes leading and trailing whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trim('  abc  ');
     * // => 'abc'
     *
     * _.trim('-_-abc-_-', '_-');
     * // => 'abc'
     *
     * _.map(['  foo  ', '  bar  '], _.trim);
     * // => ['foo', 'bar']
     */
    function trim(string, chars, guard) {
      string = toString(string);
      if (string && (guard || chars === undefined)) {
        return string.replace(reTrim, '');
      }
      if (!string || !(chars = baseToString(chars))) {
        return string;
      }
      var strSymbols = stringToArray(string),
          chrSymbols = stringToArray(chars),
          start = charsStartIndex(strSymbols, chrSymbols),
          end = charsEndIndex(strSymbols, chrSymbols) + 1;

      return castSlice(strSymbols, start, end).join('');
    }

    /**
     * Removes trailing whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trimEnd('  abc  ');
     * // => '  abc'
     *
     * _.trimEnd('-_-abc-_-', '_-');
     * // => '-_-abc'
     */
    function trimEnd(string, chars, guard) {
      string = toString(string);
      if (string && (guard || chars === undefined)) {
        return string.replace(reTrimEnd, '');
      }
      if (!string || !(chars = baseToString(chars))) {
        return string;
      }
      var strSymbols = stringToArray(string),
          end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;

      return castSlice(strSymbols, 0, end).join('');
    }

    /**
     * Removes leading whitespace or specified characters from `string`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to trim.
     * @param {string} [chars=whitespace] The characters to trim.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {string} Returns the trimmed string.
     * @example
     *
     * _.trimStart('  abc  ');
     * // => 'abc  '
     *
     * _.trimStart('-_-abc-_-', '_-');
     * // => 'abc-_-'
     */
    function trimStart(string, chars, guard) {
      string = toString(string);
      if (string && (guard || chars === undefined)) {
        return string.replace(reTrimStart, '');
      }
      if (!string || !(chars = baseToString(chars))) {
        return string;
      }
      var strSymbols = stringToArray(string),
          start = charsStartIndex(strSymbols, stringToArray(chars));

      return castSlice(strSymbols, start).join('');
    }

    /**
     * Truncates `string` if it's longer than the given maximum string length.
     * The last characters of the truncated string are replaced with the omission
     * string which defaults to "...".
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to truncate.
     * @param {Object} [options={}] The options object.
     * @param {number} [options.length=30] The maximum string length.
     * @param {string} [options.omission='...'] The string to indicate text is omitted.
     * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
     * @returns {string} Returns the truncated string.
     * @example
     *
     * _.truncate('hi-diddly-ho there, neighborino');
     * // => 'hi-diddly-ho there, neighbo...'
     *
     * _.truncate('hi-diddly-ho there, neighborino', {
     *   'length': 24,
     *   'separator': ' '
     * });
     * // => 'hi-diddly-ho there,...'
     *
     * _.truncate('hi-diddly-ho there, neighborino', {
     *   'length': 24,
     *   'separator': /,? +/
     * });
     * // => 'hi-diddly-ho there...'
     *
     * _.truncate('hi-diddly-ho there, neighborino', {
     *   'omission': ' [...]'
     * });
     * // => 'hi-diddly-ho there, neig [...]'
     */
    function truncate(string, options) {
      var length = DEFAULT_TRUNC_LENGTH,
          omission = DEFAULT_TRUNC_OMISSION;

      if (isObject(options)) {
        var separator = 'separator' in options ? options.separator : separator;
        length = 'length' in options ? toInteger(options.length) : length;
        omission = 'omission' in options ? baseToString(options.omission) : omission;
      }
      string = toString(string);

      var strLength = string.length;
      if (hasUnicode(string)) {
        var strSymbols = stringToArray(string);
        strLength = strSymbols.length;
      }
      if (length >= strLength) {
        return string;
      }
      var end = length - stringSize(omission);
      if (end < 1) {
        return omission;
      }
      var result = strSymbols
        ? castSlice(strSymbols, 0, end).join('')
        : string.slice(0, end);

      if (separator === undefined) {
        return result + omission;
      }
      if (strSymbols) {
        end += (result.length - end);
      }
      if (isRegExp(separator)) {
        if (string.slice(end).search(separator)) {
          var match,
              substring = result;

          if (!separator.global) {
            separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
          }
          separator.lastIndex = 0;
          while ((match = separator.exec(substring))) {
            var newEnd = match.index;
          }
          result = result.slice(0, newEnd === undefined ? end : newEnd);
        }
      } else if (string.indexOf(baseToString(separator), end) != end) {
        var index = result.lastIndexOf(separator);
        if (index > -1) {
          result = result.slice(0, index);
        }
      }
      return result + omission;
    }

    /**
     * The inverse of `_.escape`; this method converts the HTML entities
     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
     * their corresponding characters.
     *
     * **Note:** No other HTML entities are unescaped. To unescape additional
     * HTML entities use a third-party library like [_he_](https://mths.be/he).
     *
     * @static
     * @memberOf _
     * @since 0.6.0
     * @category String
     * @param {string} [string=''] The string to unescape.
     * @returns {string} Returns the unescaped string.
     * @example
     *
     * _.unescape('fred, barney, &amp; pebbles');
     * // => 'fred, barney, & pebbles'
     */
    function unescape(string) {
      string = toString(string);
      return (string && reHasEscapedHtml.test(string))
        ? string.replace(reEscapedHtml, unescapeHtmlChar)
        : string;
    }

    /**
     * Converts `string`, as space separated words, to upper case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the upper cased string.
     * @example
     *
     * _.upperCase('--foo-bar');
     * // => 'FOO BAR'
     *
     * _.upperCase('fooBar');
     * // => 'FOO BAR'
     *
     * _.upperCase('__foo_bar__');
     * // => 'FOO BAR'
     */
    var upperCase = createCompounder(function(result, word, index) {
      return result + (index ? ' ' : '') + word.toUpperCase();
    });

    /**
     * Converts the first character of `string` to upper case.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category String
     * @param {string} [string=''] The string to convert.
     * @returns {string} Returns the converted string.
     * @example
     *
     * _.upperFirst('fred');
     * // => 'Fred'
     *
     * _.upperFirst('FRED');
     * // => 'FRED'
     */
    var upperFirst = createCaseFirst('toUpperCase');

    /**
     * Splits `string` into an array of its words.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category String
     * @param {string} [string=''] The string to inspect.
     * @param {RegExp|string} [pattern] The pattern to match words.
     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
     * @returns {Array} Returns the words of `string`.
     * @example
     *
     * _.words('fred, barney, & pebbles');
     * // => ['fred', 'barney', 'pebbles']
     *
     * _.words('fred, barney, & pebbles', /[^, ]+/g);
     * // => ['fred', 'barney', '&', 'pebbles']
     */
    function words(string, pattern, guard) {
      string = toString(string);
      pattern = guard ? undefined : pattern;

      if (pattern === undefined) {
        return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
      }
      return string.match(pattern) || [];
    }

    /*------------------------------------------------------------------------*/

    /**
     * Attempts to invoke `func`, returning either the result or the caught error
     * object. Any additional arguments are provided to `func` when it's invoked.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {Function} func The function to attempt.
     * @param {...*} [args] The arguments to invoke `func` with.
     * @returns {*} Returns the `func` result or error object.
     * @example
     *
     * // Avoid throwing errors for invalid selectors.
     * var elements = _.attempt(function(selector) {
     *   return document.querySelectorAll(selector);
     * }, '>_>');
     *
     * if (_.isError(elements)) {
     *   elements = [];
     * }
     */
    var attempt = baseRest(function(func, args) {
      try {
        return apply(func, undefined, args);
      } catch (e) {
        return isError(e) ? e : new Error(e);
      }
    });

    /**
     * Binds methods of an object to the object itself, overwriting the existing
     * method.
     *
     * **Note:** This method doesn't set the "length" property of bound functions.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {Object} object The object to bind and assign the bound methods to.
     * @param {...(string|string[])} methodNames The object method names to bind.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var view = {
     *   'label': 'docs',
     *   'click': function() {
     *     console.log('clicked ' + this.label);
     *   }
     * };
     *
     * _.bindAll(view, ['click']);
     * jQuery(element).on('click', view.click);
     * // => Logs 'clicked docs' when clicked.
     */
    var bindAll = flatRest(function(object, methodNames) {
      arrayEach(methodNames, function(key) {
        key = toKey(key);
        baseAssignValue(object, key, bind(object[key], object));
      });
      return object;
    });

    /**
     * Creates a function that iterates over `pairs` and invokes the corresponding
     * function of the first predicate to return truthy. The predicate-function
     * pairs are invoked with the `this` binding and arguments of the created
     * function.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {Array} pairs The predicate-function pairs.
     * @returns {Function} Returns the new composite function.
     * @example
     *
     * var func = _.cond([
     *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
     *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
     *   [_.stubTrue,                      _.constant('no match')]
     * ]);
     *
     * func({ 'a': 1, 'b': 2 });
     * // => 'matches A'
     *
     * func({ 'a': 0, 'b': 1 });
     * // => 'matches B'
     *
     * func({ 'a': '1', 'b': '2' });
     * // => 'no match'
     */
    function cond(pairs) {
      var length = pairs == null ? 0 : pairs.length,
          toIteratee = getIteratee();

      pairs = !length ? [] : arrayMap(pairs, function(pair) {
        if (typeof pair[1] != 'function') {
          throw new TypeError(FUNC_ERROR_TEXT);
        }
        return [toIteratee(pair[0]), pair[1]];
      });

      return baseRest(function(args) {
        var index = -1;
        while (++index < length) {
          var pair = pairs[index];
          if (apply(pair[0], this, args)) {
            return apply(pair[1], this, args);
          }
        }
      });
    }

    /**
     * Creates a function that invokes the predicate properties of `source` with
     * the corresponding property values of a given object, returning `true` if
     * all predicates return truthy, else `false`.
     *
     * **Note:** The created function is equivalent to `_.conformsTo` with
     * `source` partially applied.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {Object} source The object of property predicates to conform to.
     * @returns {Function} Returns the new spec function.
     * @example
     *
     * var objects = [
     *   { 'a': 2, 'b': 1 },
     *   { 'a': 1, 'b': 2 }
     * ];
     *
     * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
     * // => [{ 'a': 1, 'b': 2 }]
     */
    function conforms(source) {
      return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that returns `value`.
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Util
     * @param {*} value The value to return from the new function.
     * @returns {Function} Returns the new constant function.
     * @example
     *
     * var objects = _.times(2, _.constant({ 'a': 1 }));
     *
     * console.log(objects);
     * // => [{ 'a': 1 }, { 'a': 1 }]
     *
     * console.log(objects[0] === objects[1]);
     * // => true
     */
    function constant(value) {
      return function() {
        return value;
      };
    }

    /**
     * Checks `value` to determine whether a default value should be returned in
     * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
     * or `undefined`.
     *
     * @static
     * @memberOf _
     * @since 4.14.0
     * @category Util
     * @param {*} value The value to check.
     * @param {*} defaultValue The default value.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * _.defaultTo(1, 10);
     * // => 1
     *
     * _.defaultTo(undefined, 10);
     * // => 10
     */
    function defaultTo(value, defaultValue) {
      return (value == null || value !== value) ? defaultValue : value;
    }

    /**
     * Creates a function that returns the result of invoking the given functions
     * with the `this` binding of the created function, where each successive
     * invocation is supplied the return value of the previous.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {...(Function|Function[])} [funcs] The functions to invoke.
     * @returns {Function} Returns the new composite function.
     * @see _.flowRight
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var addSquare = _.flow([_.add, square]);
     * addSquare(1, 2);
     * // => 9
     */
    var flow = createFlow();

    /**
     * This method is like `_.flow` except that it creates a function that
     * invokes the given functions from right to left.
     *
     * @static
     * @since 3.0.0
     * @memberOf _
     * @category Util
     * @param {...(Function|Function[])} [funcs] The functions to invoke.
     * @returns {Function} Returns the new composite function.
     * @see _.flow
     * @example
     *
     * function square(n) {
     *   return n * n;
     * }
     *
     * var addSquare = _.flowRight([square, _.add]);
     * addSquare(1, 2);
     * // => 9
     */
    var flowRight = createFlow(true);

    /**
     * This method returns the first argument it receives.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {*} value Any value.
     * @returns {*} Returns `value`.
     * @example
     *
     * var object = { 'a': 1 };
     *
     * console.log(_.identity(object) === object);
     * // => true
     */
    function identity(value) {
      return value;
    }

    /**
     * Creates a function that invokes `func` with the arguments of the created
     * function. If `func` is a property name, the created function returns the
     * property value for a given element. If `func` is an array or object, the
     * created function returns `true` for elements that contain the equivalent
     * source properties, otherwise it returns `false`.
     *
     * @static
     * @since 4.0.0
     * @memberOf _
     * @category Util
     * @param {*} [func=_.identity] The value to convert to a callback.
     * @returns {Function} Returns the callback.
     * @example
     *
     * var users = [
     *   { 'user': 'barney', 'age': 36, 'active': true },
     *   { 'user': 'fred',   'age': 40, 'active': false }
     * ];
     *
     * // The `_.matches` iteratee shorthand.
     * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
     * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
     *
     * // The `_.matchesProperty` iteratee shorthand.
     * _.filter(users, _.iteratee(['user', 'fred']));
     * // => [{ 'user': 'fred', 'age': 40 }]
     *
     * // The `_.property` iteratee shorthand.
     * _.map(users, _.iteratee('user'));
     * // => ['barney', 'fred']
     *
     * // Create custom iteratee shorthands.
     * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
     *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
     *     return func.test(string);
     *   };
     * });
     *
     * _.filter(['abc', 'def'], /ef/);
     * // => ['def']
     */
    function iteratee(func) {
      return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that performs a partial deep comparison between a given
     * object and `source`, returning `true` if the given object has equivalent
     * property values, else `false`.
     *
     * **Note:** The created function is equivalent to `_.isMatch` with `source`
     * partially applied.
     *
     * Partial comparisons will match empty array and empty object `source`
     * values against any array or object value, respectively. See `_.isEqual`
     * for a list of supported value comparisons.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {Object} source The object of property values to match.
     * @returns {Function} Returns the new spec function.
     * @example
     *
     * var objects = [
     *   { 'a': 1, 'b': 2, 'c': 3 },
     *   { 'a': 4, 'b': 5, 'c': 6 }
     * ];
     *
     * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
     * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
     */
    function matches(source) {
      return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that performs a partial deep comparison between the
     * value at `path` of a given object to `srcValue`, returning `true` if the
     * object value is equivalent, else `false`.
     *
     * **Note:** Partial comparisons will match empty array and empty object
     * `srcValue` values against any array or object value, respectively. See
     * `_.isEqual` for a list of supported value comparisons.
     *
     * @static
     * @memberOf _
     * @since 3.2.0
     * @category Util
     * @param {Array|string} path The path of the property to get.
     * @param {*} srcValue The value to match.
     * @returns {Function} Returns the new spec function.
     * @example
     *
     * var objects = [
     *   { 'a': 1, 'b': 2, 'c': 3 },
     *   { 'a': 4, 'b': 5, 'c': 6 }
     * ];
     *
     * _.find(objects, _.matchesProperty('a', 4));
     * // => { 'a': 4, 'b': 5, 'c': 6 }
     */
    function matchesProperty(path, srcValue) {
      return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
    }

    /**
     * Creates a function that invokes the method at `path` of a given object.
     * Any additional arguments are provided to the invoked method.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Util
     * @param {Array|string} path The path of the method to invoke.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {Function} Returns the new invoker function.
     * @example
     *
     * var objects = [
     *   { 'a': { 'b': _.constant(2) } },
     *   { 'a': { 'b': _.constant(1) } }
     * ];
     *
     * _.map(objects, _.method('a.b'));
     * // => [2, 1]
     *
     * _.map(objects, _.method(['a', 'b']));
     * // => [2, 1]
     */
    var method = baseRest(function(path, args) {
      return function(object) {
        return baseInvoke(object, path, args);
      };
    });

    /**
     * The opposite of `_.method`; this method creates a function that invokes
     * the method at a given path of `object`. Any additional arguments are
     * provided to the invoked method.
     *
     * @static
     * @memberOf _
     * @since 3.7.0
     * @category Util
     * @param {Object} object The object to query.
     * @param {...*} [args] The arguments to invoke the method with.
     * @returns {Function} Returns the new invoker function.
     * @example
     *
     * var array = _.times(3, _.constant),
     *     object = { 'a': array, 'b': array, 'c': array };
     *
     * _.map(['a[2]', 'c[0]'], _.methodOf(object));
     * // => [2, 0]
     *
     * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
     * // => [2, 0]
     */
    var methodOf = baseRest(function(object, args) {
      return function(path) {
        return baseInvoke(object, path, args);
      };
    });

    /**
     * Adds all own enumerable string keyed function properties of a source
     * object to the destination object. If `object` is a function, then methods
     * are added to its prototype as well.
     *
     * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
     * avoid conflicts caused by modifying the original.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {Function|Object} [object=lodash] The destination object.
     * @param {Object} source The object of functions to add.
     * @param {Object} [options={}] The options object.
     * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
     * @returns {Function|Object} Returns `object`.
     * @example
     *
     * function vowels(string) {
     *   return _.filter(string, function(v) {
     *     return /[aeiou]/i.test(v);
     *   });
     * }
     *
     * _.mixin({ 'vowels': vowels });
     * _.vowels('fred');
     * // => ['e']
     *
     * _('fred').vowels().value();
     * // => ['e']
     *
     * _.mixin({ 'vowels': vowels }, { 'chain': false });
     * _('fred').vowels();
     * // => ['e']
     */
    function mixin(object, source, options) {
      var props = keys(source),
          methodNames = baseFunctions(source, props);

      if (options == null &&
          !(isObject(source) && (methodNames.length || !props.length))) {
        options = source;
        source = object;
        object = this;
        methodNames = baseFunctions(source, keys(source));
      }
      var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
          isFunc = isFunction(object);

      arrayEach(methodNames, function(methodName) {
        var func = source[methodName];
        object[methodName] = func;
        if (isFunc) {
          object.prototype[methodName] = function() {
            var chainAll = this.__chain__;
            if (chain || chainAll) {
              var result = object(this.__wrapped__),
                  actions = result.__actions__ = copyArray(this.__actions__);

              actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
              result.__chain__ = chainAll;
              return result;
            }
            return func.apply(object, arrayPush([this.value()], arguments));
          };
        }
      });

      return object;
    }

    /**
     * Reverts the `_` variable to its previous value and returns a reference to
     * the `lodash` function.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @returns {Function} Returns the `lodash` function.
     * @example
     *
     * var lodash = _.noConflict();
     */
    function noConflict() {
      if (root._ === this) {
        root._ = oldDash;
      }
      return this;
    }

    /**
     * This method returns `undefined`.
     *
     * @static
     * @memberOf _
     * @since 2.3.0
     * @category Util
     * @example
     *
     * _.times(2, _.noop);
     * // => [undefined, undefined]
     */
    function noop() {
      // No operation performed.
    }

    /**
     * Creates a function that gets the argument at index `n`. If `n` is negative,
     * the nth argument from the end is returned.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {number} [n=0] The index of the argument to return.
     * @returns {Function} Returns the new pass-thru function.
     * @example
     *
     * var func = _.nthArg(1);
     * func('a', 'b', 'c', 'd');
     * // => 'b'
     *
     * var func = _.nthArg(-2);
     * func('a', 'b', 'c', 'd');
     * // => 'c'
     */
    function nthArg(n) {
      n = toInteger(n);
      return baseRest(function(args) {
        return baseNth(args, n);
      });
    }

    /**
     * Creates a function that invokes `iteratees` with the arguments it receives
     * and returns their results.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {...(Function|Function[])} [iteratees=[_.identity]]
     *  The iteratees to invoke.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var func = _.over([Math.max, Math.min]);
     *
     * func(1, 2, 3, 4);
     * // => [4, 1]
     */
    var over = createOver(arrayMap);

    /**
     * Creates a function that checks if **all** of the `predicates` return
     * truthy when invoked with the arguments it receives.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {...(Function|Function[])} [predicates=[_.identity]]
     *  The predicates to check.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var func = _.overEvery([Boolean, isFinite]);
     *
     * func('1');
     * // => true
     *
     * func(null);
     * // => false
     *
     * func(NaN);
     * // => false
     */
    var overEvery = createOver(arrayEvery);

    /**
     * Creates a function that checks if **any** of the `predicates` return
     * truthy when invoked with the arguments it receives.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {...(Function|Function[])} [predicates=[_.identity]]
     *  The predicates to check.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var func = _.overSome([Boolean, isFinite]);
     *
     * func('1');
     * // => true
     *
     * func(null);
     * // => true
     *
     * func(NaN);
     * // => false
     */
    var overSome = createOver(arraySome);

    /**
     * Creates a function that returns the value at `path` of a given object.
     *
     * @static
     * @memberOf _
     * @since 2.4.0
     * @category Util
     * @param {Array|string} path The path of the property to get.
     * @returns {Function} Returns the new accessor function.
     * @example
     *
     * var objects = [
     *   { 'a': { 'b': 2 } },
     *   { 'a': { 'b': 1 } }
     * ];
     *
     * _.map(objects, _.property('a.b'));
     * // => [2, 1]
     *
     * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
     * // => [1, 2]
     */
    function property(path) {
      return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
    }

    /**
     * The opposite of `_.property`; this method creates a function that returns
     * the value at a given path of `object`.
     *
     * @static
     * @memberOf _
     * @since 3.0.0
     * @category Util
     * @param {Object} object The object to query.
     * @returns {Function} Returns the new accessor function.
     * @example
     *
     * var array = [0, 1, 2],
     *     object = { 'a': array, 'b': array, 'c': array };
     *
     * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
     * // => [2, 0]
     *
     * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
     * // => [2, 0]
     */
    function propertyOf(object) {
      return function(path) {
        return object == null ? undefined : baseGet(object, path);
      };
    }

    /**
     * Creates an array of numbers (positive and/or negative) progressing from
     * `start` up to, but not including, `end`. A step of `-1` is used if a negative
     * `start` is specified without an `end` or `step`. If `end` is not specified,
     * it's set to `start` with `start` then set to `0`.
     *
     * **Note:** JavaScript follows the IEEE-754 standard for resolving
     * floating-point values which can produce unexpected results.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @param {number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns the range of numbers.
     * @see _.inRange, _.rangeRight
     * @example
     *
     * _.range(4);
     * // => [0, 1, 2, 3]
     *
     * _.range(-4);
     * // => [0, -1, -2, -3]
     *
     * _.range(1, 5);
     * // => [1, 2, 3, 4]
     *
     * _.range(0, 20, 5);
     * // => [0, 5, 10, 15]
     *
     * _.range(0, -4, -1);
     * // => [0, -1, -2, -3]
     *
     * _.range(1, 4, 0);
     * // => [1, 1, 1]
     *
     * _.range(0);
     * // => []
     */
    var range = createRange();

    /**
     * This method is like `_.range` except that it populates values in
     * descending order.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @param {number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns the range of numbers.
     * @see _.inRange, _.range
     * @example
     *
     * _.rangeRight(4);
     * // => [3, 2, 1, 0]
     *
     * _.rangeRight(-4);
     * // => [-3, -2, -1, 0]
     *
     * _.rangeRight(1, 5);
     * // => [4, 3, 2, 1]
     *
     * _.rangeRight(0, 20, 5);
     * // => [15, 10, 5, 0]
     *
     * _.rangeRight(0, -4, -1);
     * // => [-3, -2, -1, 0]
     *
     * _.rangeRight(1, 4, 0);
     * // => [1, 1, 1]
     *
     * _.rangeRight(0);
     * // => []
     */
    var rangeRight = createRange(true);

    /**
     * This method returns a new empty array.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {Array} Returns the new empty array.
     * @example
     *
     * var arrays = _.times(2, _.stubArray);
     *
     * console.log(arrays);
     * // => [[], []]
     *
     * console.log(arrays[0] === arrays[1]);
     * // => false
     */
    function stubArray() {
      return [];
    }

    /**
     * This method returns `false`.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {boolean} Returns `false`.
     * @example
     *
     * _.times(2, _.stubFalse);
     * // => [false, false]
     */
    function stubFalse() {
      return false;
    }

    /**
     * This method returns a new empty object.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {Object} Returns the new empty object.
     * @example
     *
     * var objects = _.times(2, _.stubObject);
     *
     * console.log(objects);
     * // => [{}, {}]
     *
     * console.log(objects[0] === objects[1]);
     * // => false
     */
    function stubObject() {
      return {};
    }

    /**
     * This method returns an empty string.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {string} Returns the empty string.
     * @example
     *
     * _.times(2, _.stubString);
     * // => ['', '']
     */
    function stubString() {
      return '';
    }

    /**
     * This method returns `true`.
     *
     * @static
     * @memberOf _
     * @since 4.13.0
     * @category Util
     * @returns {boolean} Returns `true`.
     * @example
     *
     * _.times(2, _.stubTrue);
     * // => [true, true]
     */
    function stubTrue() {
      return true;
    }

    /**
     * Invokes the iteratee `n` times, returning an array of the results of
     * each invocation. The iteratee is invoked with one argument; (index).
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {number} n The number of times to invoke `iteratee`.
     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
     * @returns {Array} Returns the array of results.
     * @example
     *
     * _.times(3, String);
     * // => ['0', '1', '2']
     *
     *  _.times(4, _.constant(0));
     * // => [0, 0, 0, 0]
     */
    function times(n, iteratee) {
      n = toInteger(n);
      if (n < 1 || n > MAX_SAFE_INTEGER) {
        return [];
      }
      var index = MAX_ARRAY_LENGTH,
          length = nativeMin(n, MAX_ARRAY_LENGTH);

      iteratee = getIteratee(iteratee);
      n -= MAX_ARRAY_LENGTH;

      var result = baseTimes(length, iteratee);
      while (++index < n) {
        iteratee(index);
      }
      return result;
    }

    /**
     * Converts `value` to a property path array.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Util
     * @param {*} value The value to convert.
     * @returns {Array} Returns the new property path array.
     * @example
     *
     * _.toPath('a.b.c');
     * // => ['a', 'b', 'c']
     *
     * _.toPath('a[0].b.c');
     * // => ['a', '0', 'b', 'c']
     */
    function toPath(value) {
      if (isArray(value)) {
        return arrayMap(value, toKey);
      }
      return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
    }

    /**
     * Generates a unique ID. If `prefix` is given, the ID is appended to it.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Util
     * @param {string} [prefix=''] The value to prefix the ID with.
     * @returns {string} Returns the unique ID.
     * @example
     *
     * _.uniqueId('contact_');
     * // => 'contact_104'
     *
     * _.uniqueId();
     * // => '105'
     */
    function uniqueId(prefix) {
      var id = ++idCounter;
      return toString(prefix) + id;
    }

    /*------------------------------------------------------------------------*/

    /**
     * Adds two numbers.
     *
     * @static
     * @memberOf _
     * @since 3.4.0
     * @category Math
     * @param {number} augend The first number in an addition.
     * @param {number} addend The second number in an addition.
     * @returns {number} Returns the total.
     * @example
     *
     * _.add(6, 4);
     * // => 10
     */
    var add = createMathOperation(function(augend, addend) {
      return augend + addend;
    }, 0);

    /**
     * Computes `number` rounded up to `precision`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Math
     * @param {number} number The number to round up.
     * @param {number} [precision=0] The precision to round up to.
     * @returns {number} Returns the rounded up number.
     * @example
     *
     * _.ceil(4.006);
     * // => 5
     *
     * _.ceil(6.004, 2);
     * // => 6.01
     *
     * _.ceil(6040, -2);
     * // => 6100
     */
    var ceil = createRound('ceil');

    /**
     * Divide two numbers.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Math
     * @param {number} dividend The first number in a division.
     * @param {number} divisor The second number in a division.
     * @returns {number} Returns the quotient.
     * @example
     *
     * _.divide(6, 4);
     * // => 1.5
     */
    var divide = createMathOperation(function(dividend, divisor) {
      return dividend / divisor;
    }, 1);

    /**
     * Computes `number` rounded down to `precision`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Math
     * @param {number} number The number to round down.
     * @param {number} [precision=0] The precision to round down to.
     * @returns {number} Returns the rounded down number.
     * @example
     *
     * _.floor(4.006);
     * // => 4
     *
     * _.floor(0.046, 2);
     * // => 0.04
     *
     * _.floor(4060, -2);
     * // => 4000
     */
    var floor = createRound('floor');

    /**
     * Computes the maximum value of `array`. If `array` is empty or falsey,
     * `undefined` is returned.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {*} Returns the maximum value.
     * @example
     *
     * _.max([4, 2, 8, 6]);
     * // => 8
     *
     * _.max([]);
     * // => undefined
     */
    function max(array) {
      return (array && array.length)
        ? baseExtremum(array, identity, baseGt)
        : undefined;
    }

    /**
     * This method is like `_.max` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the criterion by which
     * the value is ranked. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {*} Returns the maximum value.
     * @example
     *
     * var objects = [{ 'n': 1 }, { 'n': 2 }];
     *
     * _.maxBy(objects, function(o) { return o.n; });
     * // => { 'n': 2 }
     *
     * // The `_.property` iteratee shorthand.
     * _.maxBy(objects, 'n');
     * // => { 'n': 2 }
     */
    function maxBy(array, iteratee) {
      return (array && array.length)
        ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
        : undefined;
    }

    /**
     * Computes the mean of the values in `array`.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {number} Returns the mean.
     * @example
     *
     * _.mean([4, 2, 8, 6]);
     * // => 5
     */
    function mean(array) {
      return baseMean(array, identity);
    }

    /**
     * This method is like `_.mean` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the value to be averaged.
     * The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the mean.
     * @example
     *
     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
     *
     * _.meanBy(objects, function(o) { return o.n; });
     * // => 5
     *
     * // The `_.property` iteratee shorthand.
     * _.meanBy(objects, 'n');
     * // => 5
     */
    function meanBy(array, iteratee) {
      return baseMean(array, getIteratee(iteratee, 2));
    }

    /**
     * Computes the minimum value of `array`. If `array` is empty or falsey,
     * `undefined` is returned.
     *
     * @static
     * @since 0.1.0
     * @memberOf _
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {*} Returns the minimum value.
     * @example
     *
     * _.min([4, 2, 8, 6]);
     * // => 2
     *
     * _.min([]);
     * // => undefined
     */
    function min(array) {
      return (array && array.length)
        ? baseExtremum(array, identity, baseLt)
        : undefined;
    }

    /**
     * This method is like `_.min` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the criterion by which
     * the value is ranked. The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {*} Returns the minimum value.
     * @example
     *
     * var objects = [{ 'n': 1 }, { 'n': 2 }];
     *
     * _.minBy(objects, function(o) { return o.n; });
     * // => { 'n': 1 }
     *
     * // The `_.property` iteratee shorthand.
     * _.minBy(objects, 'n');
     * // => { 'n': 1 }
     */
    function minBy(array, iteratee) {
      return (array && array.length)
        ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
        : undefined;
    }

    /**
     * Multiply two numbers.
     *
     * @static
     * @memberOf _
     * @since 4.7.0
     * @category Math
     * @param {number} multiplier The first number in a multiplication.
     * @param {number} multiplicand The second number in a multiplication.
     * @returns {number} Returns the product.
     * @example
     *
     * _.multiply(6, 4);
     * // => 24
     */
    var multiply = createMathOperation(function(multiplier, multiplicand) {
      return multiplier * multiplicand;
    }, 1);

    /**
     * Computes `number` rounded to `precision`.
     *
     * @static
     * @memberOf _
     * @since 3.10.0
     * @category Math
     * @param {number} number The number to round.
     * @param {number} [precision=0] The precision to round to.
     * @returns {number} Returns the rounded number.
     * @example
     *
     * _.round(4.006);
     * // => 4
     *
     * _.round(4.006, 2);
     * // => 4.01
     *
     * _.round(4060, -2);
     * // => 4100
     */
    var round = createRound('round');

    /**
     * Subtract two numbers.
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {number} minuend The first number in a subtraction.
     * @param {number} subtrahend The second number in a subtraction.
     * @returns {number} Returns the difference.
     * @example
     *
     * _.subtract(6, 4);
     * // => 2
     */
    var subtract = createMathOperation(function(minuend, subtrahend) {
      return minuend - subtrahend;
    }, 0);

    /**
     * Computes the sum of the values in `array`.
     *
     * @static
     * @memberOf _
     * @since 3.4.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @returns {number} Returns the sum.
     * @example
     *
     * _.sum([4, 2, 8, 6]);
     * // => 20
     */
    function sum(array) {
      return (array && array.length)
        ? baseSum(array, identity)
        : 0;
    }

    /**
     * This method is like `_.sum` except that it accepts `iteratee` which is
     * invoked for each element in `array` to generate the value to be summed.
     * The iteratee is invoked with one argument: (value).
     *
     * @static
     * @memberOf _
     * @since 4.0.0
     * @category Math
     * @param {Array} array The array to iterate over.
     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
     * @returns {number} Returns the sum.
     * @example
     *
     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
     *
     * _.sumBy(objects, function(o) { return o.n; });
     * // => 20
     *
     * // The `_.property` iteratee shorthand.
     * _.sumBy(objects, 'n');
     * // => 20
     */
    function sumBy(array, iteratee) {
      return (array && array.length)
        ? baseSum(array, getIteratee(iteratee, 2))
        : 0;
    }

    /*------------------------------------------------------------------------*/

    // Add methods that return wrapped values in chain sequences.
    lodash.after = after;
    lodash.ary = ary;
    lodash.assign = assign;
    lodash.assignIn = assignIn;
    lodash.assignInWith = assignInWith;
    lodash.assignWith = assignWith;
    lodash.at = at;
    lodash.before = before;
    lodash.bind = bind;
    lodash.bindAll = bindAll;
    lodash.bindKey = bindKey;
    lodash.castArray = castArray;
    lodash.chain = chain;
    lodash.chunk = chunk;
    lodash.compact = compact;
    lodash.concat = concat;
    lodash.cond = cond;
    lodash.conforms = conforms;
    lodash.constant = constant;
    lodash.countBy = countBy;
    lodash.create = create;
    lodash.curry = curry;
    lodash.curryRight = curryRight;
    lodash.debounce = debounce;
    lodash.defaults = defaults;
    lodash.defaultsDeep = defaultsDeep;
    lodash.defer = defer;
    lodash.delay = delay;
    lodash.difference = difference;
    lodash.differenceBy = differenceBy;
    lodash.differenceWith = differenceWith;
    lodash.drop = drop;
    lodash.dropRight = dropRight;
    lodash.dropRightWhile = dropRightWhile;
    lodash.dropWhile = dropWhile;
    lodash.fill = fill;
    lodash.filter = filter;
    lodash.flatMap = flatMap;
    lodash.flatMapDeep = flatMapDeep;
    lodash.flatMapDepth = flatMapDepth;
    lodash.flatten = flatten;
    lodash.flattenDeep = flattenDeep;
    lodash.flattenDepth = flattenDepth;
    lodash.flip = flip;
    lodash.flow = flow;
    lodash.flowRight = flowRight;
    lodash.fromPairs = fromPairs;
    lodash.functions = functions;
    lodash.functionsIn = functionsIn;
    lodash.groupBy = groupBy;
    lodash.initial = initial;
    lodash.intersection = intersection;
    lodash.intersectionBy = intersectionBy;
    lodash.intersectionWith = intersectionWith;
    lodash.invert = invert;
    lodash.invertBy = invertBy;
    lodash.invokeMap = invokeMap;
    lodash.iteratee = iteratee;
    lodash.keyBy = keyBy;
    lodash.keys = keys;
    lodash.keysIn = keysIn;
    lodash.map = map;
    lodash.mapKeys = mapKeys;
    lodash.mapValues = mapValues;
    lodash.matches = matches;
    lodash.matchesProperty = matchesProperty;
    lodash.memoize = memoize;
    lodash.merge = merge;
    lodash.mergeWith = mergeWith;
    lodash.method = method;
    lodash.methodOf = methodOf;
    lodash.mixin = mixin;
    lodash.negate = negate;
    lodash.nthArg = nthArg;
    lodash.omit = omit;
    lodash.omitBy = omitBy;
    lodash.once = once;
    lodash.orderBy = orderBy;
    lodash.over = over;
    lodash.overArgs = overArgs;
    lodash.overEvery = overEvery;
    lodash.overSome = overSome;
    lodash.partial = partial;
    lodash.partialRight = partialRight;
    lodash.partition = partition;
    lodash.pick = pick;
    lodash.pickBy = pickBy;
    lodash.property = property;
    lodash.propertyOf = propertyOf;
    lodash.pull = pull;
    lodash.pullAll = pullAll;
    lodash.pullAllBy = pullAllBy;
    lodash.pullAllWith = pullAllWith;
    lodash.pullAt = pullAt;
    lodash.range = range;
    lodash.rangeRight = rangeRight;
    lodash.rearg = rearg;
    lodash.reject = reject;
    lodash.remove = remove;
    lodash.rest = rest;
    lodash.reverse = reverse;
    lodash.sampleSize = sampleSize;
    lodash.set = set;
    lodash.setWith = setWith;
    lodash.shuffle = shuffle;
    lodash.slice = slice;
    lodash.sortBy = sortBy;
    lodash.sortedUniq = sortedUniq;
    lodash.sortedUniqBy = sortedUniqBy;
    lodash.split = split;
    lodash.spread = spread;
    lodash.tail = tail;
    lodash.take = take;
    lodash.takeRight = takeRight;
    lodash.takeRightWhile = takeRightWhile;
    lodash.takeWhile = takeWhile;
    lodash.tap = tap;
    lodash.throttle = throttle;
    lodash.thru = thru;
    lodash.toArray = toArray;
    lodash.toPairs = toPairs;
    lodash.toPairsIn = toPairsIn;
    lodash.toPath = toPath;
    lodash.toPlainObject = toPlainObject;
    lodash.transform = transform;
    lodash.unary = unary;
    lodash.union = union;
    lodash.unionBy = unionBy;
    lodash.unionWith = unionWith;
    lodash.uniq = uniq;
    lodash.uniqBy = uniqBy;
    lodash.uniqWith = uniqWith;
    lodash.unset = unset;
    lodash.unzip = unzip;
    lodash.unzipWith = unzipWith;
    lodash.update = update;
    lodash.updateWith = updateWith;
    lodash.values = values;
    lodash.valuesIn = valuesIn;
    lodash.without = without;
    lodash.words = words;
    lodash.wrap = wrap;
    lodash.xor = xor;
    lodash.xorBy = xorBy;
    lodash.xorWith = xorWith;
    lodash.zip = zip;
    lodash.zipObject = zipObject;
    lodash.zipObjectDeep = zipObjectDeep;
    lodash.zipWith = zipWith;

    // Add aliases.
    lodash.entries = toPairs;
    lodash.entriesIn = toPairsIn;
    lodash.extend = assignIn;
    lodash.extendWith = assignInWith;

    // Add methods to `lodash.prototype`.
    mixin(lodash, lodash);

    /*------------------------------------------------------------------------*/

    // Add methods that return unwrapped values in chain sequences.
    lodash.add = add;
    lodash.attempt = attempt;
    lodash.camelCase = camelCase;
    lodash.capitalize = capitalize;
    lodash.ceil = ceil;
    lodash.clamp = clamp;
    lodash.clone = clone;
    lodash.cloneDeep = cloneDeep;
    lodash.cloneDeepWith = cloneDeepWith;
    lodash.cloneWith = cloneWith;
    lodash.conformsTo = conformsTo;
    lodash.deburr = deburr;
    lodash.defaultTo = defaultTo;
    lodash.divide = divide;
    lodash.endsWith = endsWith;
    lodash.eq = eq;
    lodash.escape = escape;
    lodash.escapeRegExp = escapeRegExp;
    lodash.every = every;
    lodash.find = find;
    lodash.findIndex = findIndex;
    lodash.findKey = findKey;
    lodash.findLast = findLast;
    lodash.findLastIndex = findLastIndex;
    lodash.findLastKey = findLastKey;
    lodash.floor = floor;
    lodash.forEach = forEach;
    lodash.forEachRight = forEachRight;
    lodash.forIn = forIn;
    lodash.forInRight = forInRight;
    lodash.forOwn = forOwn;
    lodash.forOwnRight = forOwnRight;
    lodash.get = get;
    lodash.gt = gt;
    lodash.gte = gte;
    lodash.has = has;
    lodash.hasIn = hasIn;
    lodash.head = head;
    lodash.identity = identity;
    lodash.includes = includes;
    lodash.indexOf = indexOf;
    lodash.inRange = inRange;
    lodash.invoke = invoke;
    lodash.isArguments = isArguments;
    lodash.isArray = isArray;
    lodash.isArrayBuffer = isArrayBuffer;
    lodash.isArrayLike = isArrayLike;
    lodash.isArrayLikeObject = isArrayLikeObject;
    lodash.isBoolean = isBoolean;
    lodash.isBuffer = isBuffer;
    lodash.isDate = isDate;
    lodash.isElement = isElement;
    lodash.isEmpty = isEmpty;
    lodash.isEqual = isEqual;
    lodash.isEqualWith = isEqualWith;
    lodash.isError = isError;
    lodash.isFinite = isFinite;
    lodash.isFunction = isFunction;
    lodash.isInteger = isInteger;
    lodash.isLength = isLength;
    lodash.isMap = isMap;
    lodash.isMatch = isMatch;
    lodash.isMatchWith = isMatchWith;
    lodash.isNaN = isNaN;
    lodash.isNative = isNative;
    lodash.isNil = isNil;
    lodash.isNull = isNull;
    lodash.isNumber = isNumber;
    lodash.isObject = isObject;
    lodash.isObjectLike = isObjectLike;
    lodash.isPlainObject = isPlainObject;
    lodash.isRegExp = isRegExp;
    lodash.isSafeInteger = isSafeInteger;
    lodash.isSet = isSet;
    lodash.isString = isString;
    lodash.isSymbol = isSymbol;
    lodash.isTypedArray = isTypedArray;
    lodash.isUndefined = isUndefined;
    lodash.isWeakMap = isWeakMap;
    lodash.isWeakSet = isWeakSet;
    lodash.join = join;
    lodash.kebabCase = kebabCase;
    lodash.last = last;
    lodash.lastIndexOf = lastIndexOf;
    lodash.lowerCase = lowerCase;
    lodash.lowerFirst = lowerFirst;
    lodash.lt = lt;
    lodash.lte = lte;
    lodash.max = max;
    lodash.maxBy = maxBy;
    lodash.mean = mean;
    lodash.meanBy = meanBy;
    lodash.min = min;
    lodash.minBy = minBy;
    lodash.stubArray = stubArray;
    lodash.stubFalse = stubFalse;
    lodash.stubObject = stubObject;
    lodash.stubString = stubString;
    lodash.stubTrue = stubTrue;
    lodash.multiply = multiply;
    lodash.nth = nth;
    lodash.noConflict = noConflict;
    lodash.noop = noop;
    lodash.now = now;
    lodash.pad = pad;
    lodash.padEnd = padEnd;
    lodash.padStart = padStart;
    lodash.parseInt = parseInt;
    lodash.random = random;
    lodash.reduce = reduce;
    lodash.reduceRight = reduceRight;
    lodash.repeat = repeat;
    lodash.replace = replace;
    lodash.result = result;
    lodash.round = round;
    lodash.runInContext = runInContext;
    lodash.sample = sample;
    lodash.size = size;
    lodash.snakeCase = snakeCase;
    lodash.some = some;
    lodash.sortedIndex = sortedIndex;
    lodash.sortedIndexBy = sortedIndexBy;
    lodash.sortedIndexOf = sortedIndexOf;
    lodash.sortedLastIndex = sortedLastIndex;
    lodash.sortedLastIndexBy = sortedLastIndexBy;
    lodash.sortedLastIndexOf = sortedLastIndexOf;
    lodash.startCase = startCase;
    lodash.startsWith = startsWith;
    lodash.subtract = subtract;
    lodash.sum = sum;
    lodash.sumBy = sumBy;
    lodash.template = template;
    lodash.times = times;
    lodash.toFinite = toFinite;
    lodash.toInteger = toInteger;
    lodash.toLength = toLength;
    lodash.toLower = toLower;
    lodash.toNumber = toNumber;
    lodash.toSafeInteger = toSafeInteger;
    lodash.toString = toString;
    lodash.toUpper = toUpper;
    lodash.trim = trim;
    lodash.trimEnd = trimEnd;
    lodash.trimStart = trimStart;
    lodash.truncate = truncate;
    lodash.unescape = unescape;
    lodash.uniqueId = uniqueId;
    lodash.upperCase = upperCase;
    lodash.upperFirst = upperFirst;

    // Add aliases.
    lodash.each = forEach;
    lodash.eachRight = forEachRight;
    lodash.first = head;

    mixin(lodash, (function() {
      var source = {};
      baseForOwn(lodash, function(func, methodName) {
        if (!hasOwnProperty.call(lodash.prototype, methodName)) {
          source[methodName] = func;
        }
      });
      return source;
    }()), { 'chain': false });

    /*------------------------------------------------------------------------*/

    /**
     * The semantic version number.
     *
     * @static
     * @memberOf _
     * @type {string}
     */
    lodash.VERSION = VERSION;

    // Assign default placeholders.
    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
      lodash[methodName].placeholder = lodash;
    });

    // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
    arrayEach(['drop', 'take'], function(methodName, index) {
      LazyWrapper.prototype[methodName] = function(n) {
        n = n === undefined ? 1 : nativeMax(toInteger(n), 0);

        var result = (this.__filtered__ && !index)
          ? new LazyWrapper(this)
          : this.clone();

        if (result.__filtered__) {
          result.__takeCount__ = nativeMin(n, result.__takeCount__);
        } else {
          result.__views__.push({
            'size': nativeMin(n, MAX_ARRAY_LENGTH),
            'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
          });
        }
        return result;
      };

      LazyWrapper.prototype[methodName + 'Right'] = function(n) {
        return this.reverse()[methodName](n).reverse();
      };
    });

    // Add `LazyWrapper` methods that accept an `iteratee` value.
    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
      var type = index + 1,
          isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;

      LazyWrapper.prototype[methodName] = function(iteratee) {
        var result = this.clone();
        result.__iteratees__.push({
          'iteratee': getIteratee(iteratee, 3),
          'type': type
        });
        result.__filtered__ = result.__filtered__ || isFilter;
        return result;
      };
    });

    // Add `LazyWrapper` methods for `_.head` and `_.last`.
    arrayEach(['head', 'last'], function(methodName, index) {
      var takeName = 'take' + (index ? 'Right' : '');

      LazyWrapper.prototype[methodName] = function() {
        return this[takeName](1).value()[0];
      };
    });

    // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
    arrayEach(['initial', 'tail'], function(methodName, index) {
      var dropName = 'drop' + (index ? '' : 'Right');

      LazyWrapper.prototype[methodName] = function() {
        return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
      };
    });

    LazyWrapper.prototype.compact = function() {
      return this.filter(identity);
    };

    LazyWrapper.prototype.find = function(predicate) {
      return this.filter(predicate).head();
    };

    LazyWrapper.prototype.findLast = function(predicate) {
      return this.reverse().find(predicate);
    };

    LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
      if (typeof path == 'function') {
        return new LazyWrapper(this);
      }
      return this.map(function(value) {
        return baseInvoke(value, path, args);
      });
    });

    LazyWrapper.prototype.reject = function(predicate) {
      return this.filter(negate(getIteratee(predicate)));
    };

    LazyWrapper.prototype.slice = function(start, end) {
      start = toInteger(start);

      var result = this;
      if (result.__filtered__ && (start > 0 || end < 0)) {
        return new LazyWrapper(result);
      }
      if (start < 0) {
        result = result.takeRight(-start);
      } else if (start) {
        result = result.drop(start);
      }
      if (end !== undefined) {
        end = toInteger(end);
        result = end < 0 ? result.dropRight(-end) : result.take(end - start);
      }
      return result;
    };

    LazyWrapper.prototype.takeRightWhile = function(predicate) {
      return this.reverse().takeWhile(predicate).reverse();
    };

    LazyWrapper.prototype.toArray = function() {
      return this.take(MAX_ARRAY_LENGTH);
    };

    // Add `LazyWrapper` methods to `lodash.prototype`.
    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
      var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
          isTaker = /^(?:head|last)$/.test(methodName),
          lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
          retUnwrapped = isTaker || /^find/.test(methodName);

      if (!lodashFunc) {
        return;
      }
      lodash.prototype[methodName] = function() {
        var value = this.__wrapped__,
            args = isTaker ? [1] : arguments,
            isLazy = value instanceof LazyWrapper,
            iteratee = args[0],
            useLazy = isLazy || isArray(value);

        var interceptor = function(value) {
          var result = lodashFunc.apply(lodash, arrayPush([value], args));
          return (isTaker && chainAll) ? result[0] : result;
        };

        if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
          // Avoid lazy use if the iteratee has a "length" value other than `1`.
          isLazy = useLazy = false;
        }
        var chainAll = this.__chain__,
            isHybrid = !!this.__actions__.length,
            isUnwrapped = retUnwrapped && !chainAll,
            onlyLazy = isLazy && !isHybrid;

        if (!retUnwrapped && useLazy) {
          value = onlyLazy ? value : new LazyWrapper(this);
          var result = func.apply(value, args);
          result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
          return new LodashWrapper(result, chainAll);
        }
        if (isUnwrapped && onlyLazy) {
          return func.apply(this, args);
        }
        result = this.thru(interceptor);
        return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
      };
    });

    // Add `Array` methods to `lodash.prototype`.
    arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
      var func = arrayProto[methodName],
          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
          retUnwrapped = /^(?:pop|shift)$/.test(methodName);

      lodash.prototype[methodName] = function() {
        var args = arguments;
        if (retUnwrapped && !this.__chain__) {
          var value = this.value();
          return func.apply(isArray(value) ? value : [], args);
        }
        return this[chainName](function(value) {
          return func.apply(isArray(value) ? value : [], args);
        });
      };
    });

    // Map minified method names to their real names.
    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
      var lodashFunc = lodash[methodName];
      if (lodashFunc) {
        var key = (lodashFunc.name + ''),
            names = realNames[key] || (realNames[key] = []);

        names.push({ 'name': methodName, 'func': lodashFunc });
      }
    });

    realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
      'name': 'wrapper',
      'func': undefined
    }];

    // Add methods to `LazyWrapper`.
    LazyWrapper.prototype.clone = lazyClone;
    LazyWrapper.prototype.reverse = lazyReverse;
    LazyWrapper.prototype.value = lazyValue;

    // Add chain sequence methods to the `lodash` wrapper.
    lodash.prototype.at = wrapperAt;
    lodash.prototype.chain = wrapperChain;
    lodash.prototype.commit = wrapperCommit;
    lodash.prototype.next = wrapperNext;
    lodash.prototype.plant = wrapperPlant;
    lodash.prototype.reverse = wrapperReverse;
    lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;

    // Add lazy aliases.
    lodash.prototype.first = lodash.prototype.head;

    if (symIterator) {
      lodash.prototype[symIterator] = wrapperToIterator;
    }
    return lodash;
  });

  /*--------------------------------------------------------------------------*/

  // Export lodash.
  var _ = runInContext();

  // Some AMD build optimizers, like r.js, check for condition patterns like:
  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
    // Expose Lodash on the global object to prevent errors when Lodash is
    // loaded by a script tag in the presence of an AMD loader.
    // See http://requirejs.org/docs/errors.html#mismatch for more details.
    // Use `_.noConflict` to remove Lodash from the global object.
    root._ = _;

    // Define as an anonymous module so, through path mapping, it can be
    // referenced as the "underscore" module.
    define(function() {
      return _;
    });
  }
  // Check for `exports` after `define` in case a build optimizer adds it.
  else if (freeModule) {
    // Export for Node.js.
    (freeModule.exports = _)._ = _;
    // Export for CommonJS support.
    freeExports._ = _;
  }
  else {
    // Export to the global object.
    root._ = _;
  }
}.call(this));

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],88:[function(require,module,exports){
(function (global){
/*! Native Promise Only
    v0.8.1 (c) Kyle Simpson
    MIT License: http://getify.mit-license.org
*/

(function UMD(name,context,definition){
	// special form of UMD for polyfilling across evironments
	context[name] = context[name] || definition();
	if (typeof module != "undefined" && module.exports) { module.exports = context[name]; }
	else if (typeof define == "function" && define.amd) { define(function $AMD$(){ return context[name]; }); }
})("Promise",typeof global != "undefined" ? global : this,function DEF(){
	/*jshint validthis:true */
	"use strict";

	var builtInProp, cycle, scheduling_queue,
		ToString = Object.prototype.toString,
		timer = (typeof setImmediate != "undefined") ?
			function timer(fn) { return setImmediate(fn); } :
			setTimeout
	;

	// dammit, IE8.
	try {
		Object.defineProperty({},"x",{});
		builtInProp = function builtInProp(obj,name,val,config) {
			return Object.defineProperty(obj,name,{
				value: val,
				writable: true,
				configurable: config !== false
			});
		};
	}
	catch (err) {
		builtInProp = function builtInProp(obj,name,val) {
			obj[name] = val;
			return obj;
		};
	}

	// Note: using a queue instead of array for efficiency
	scheduling_queue = (function Queue() {
		var first, last, item;

		function Item(fn,self) {
			this.fn = fn;
			this.self = self;
			this.next = void 0;
		}

		return {
			add: function add(fn,self) {
				item = new Item(fn,self);
				if (last) {
					last.next = item;
				}
				else {
					first = item;
				}
				last = item;
				item = void 0;
			},
			drain: function drain() {
				var f = first;
				first = last = cycle = void 0;

				while (f) {
					f.fn.call(f.self);
					f = f.next;
				}
			}
		};
	})();

	function schedule(fn,self) {
		scheduling_queue.add(fn,self);
		if (!cycle) {
			cycle = timer(scheduling_queue.drain);
		}
	}

	// promise duck typing
	function isThenable(o) {
		var _then, o_type = typeof o;

		if (o != null &&
			(
				o_type == "object" || o_type == "function"
			)
		) {
			_then = o.then;
		}
		return typeof _then == "function" ? _then : false;
	}

	function notify() {
		for (var i=0; i<this.chain.length; i++) {
			notifyIsolated(
				this,
				(this.state === 1) ? this.chain[i].success : this.chain[i].failure,
				this.chain[i]
			);
		}
		this.chain.length = 0;
	}

	// NOTE: This is a separate function to isolate
	// the `try..catch` so that other code can be
	// optimized better
	function notifyIsolated(self,cb,chain) {
		var ret, _then;
		try {
			if (cb === false) {
				chain.reject(self.msg);
			}
			else {
				if (cb === true) {
					ret = self.msg;
				}
				else {
					ret = cb.call(void 0,self.msg);
				}

				if (ret === chain.promise) {
					chain.reject(TypeError("Promise-chain cycle"));
				}
				else if (_then = isThenable(ret)) {
					_then.call(ret,chain.resolve,chain.reject);
				}
				else {
					chain.resolve(ret);
				}
			}
		}
		catch (err) {
			chain.reject(err);
		}
	}

	function resolve(msg) {
		var _then, self = this;

		// already triggered?
		if (self.triggered) { return; }

		self.triggered = true;

		// unwrap
		if (self.def) {
			self = self.def;
		}

		try {
			if (_then = isThenable(msg)) {
				schedule(function(){
					var def_wrapper = new MakeDefWrapper(self);
					try {
						_then.call(msg,
							function $resolve$(){ resolve.apply(def_wrapper,arguments); },
							function $reject$(){ reject.apply(def_wrapper,arguments); }
						);
					}
					catch (err) {
						reject.call(def_wrapper,err);
					}
				})
			}
			else {
				self.msg = msg;
				self.state = 1;
				if (self.chain.length > 0) {
					schedule(notify,self);
				}
			}
		}
		catch (err) {
			reject.call(new MakeDefWrapper(self),err);
		}
	}

	function reject(msg) {
		var self = this;

		// already triggered?
		if (self.triggered) { return; }

		self.triggered = true;

		// unwrap
		if (self.def) {
			self = self.def;
		}

		self.msg = msg;
		self.state = 2;
		if (self.chain.length > 0) {
			schedule(notify,self);
		}
	}

	function iteratePromises(Constructor,arr,resolver,rejecter) {
		for (var idx=0; idx<arr.length; idx++) {
			(function IIFE(idx){
				Constructor.resolve(arr[idx])
				.then(
					function $resolver$(msg){
						resolver(idx,msg);
					},
					rejecter
				);
			})(idx);
		}
	}

	function MakeDefWrapper(self) {
		this.def = self;
		this.triggered = false;
	}

	function MakeDef(self) {
		this.promise = self;
		this.state = 0;
		this.triggered = false;
		this.chain = [];
		this.msg = void 0;
	}

	function Promise(executor) {
		if (typeof executor != "function") {
			throw TypeError("Not a function");
		}

		if (this.__NPO__ !== 0) {
			throw TypeError("Not a promise");
		}

		// instance shadowing the inherited "brand"
		// to signal an already "initialized" promise
		this.__NPO__ = 1;

		var def = new MakeDef(this);

		this["then"] = function then(success,failure) {
			var o = {
				success: typeof success == "function" ? success : true,
				failure: typeof failure == "function" ? failure : false
			};
			// Note: `then(..)` itself can be borrowed to be used against
			// a different promise constructor for making the chained promise,
			// by substituting a different `this` binding.
			o.promise = new this.constructor(function extractChain(resolve,reject) {
				if (typeof resolve != "function" || typeof reject != "function") {
					throw TypeError("Not a function");
				}

				o.resolve = resolve;
				o.reject = reject;
			});
			def.chain.push(o);

			if (def.state !== 0) {
				schedule(notify,def);
			}

			return o.promise;
		};
		this["catch"] = function $catch$(failure) {
			return this.then(void 0,failure);
		};

		try {
			executor.call(
				void 0,
				function publicResolve(msg){
					resolve.call(def,msg);
				},
				function publicReject(msg) {
					reject.call(def,msg);
				}
			);
		}
		catch (err) {
			reject.call(def,err);
		}
	}

	var PromisePrototype = builtInProp({},"constructor",Promise,
		/*configurable=*/false
	);

	// Note: Android 4 cannot use `Object.defineProperty(..)` here
	Promise.prototype = PromisePrototype;

	// built-in "brand" to signal an "uninitialized" promise
	builtInProp(PromisePrototype,"__NPO__",0,
		/*configurable=*/false
	);

	builtInProp(Promise,"resolve",function Promise$resolve(msg) {
		var Constructor = this;

		// spec mandated checks
		// note: best "isPromise" check that's practical for now
		if (msg && typeof msg == "object" && msg.__NPO__ === 1) {
			return msg;
		}

		return new Constructor(function executor(resolve,reject){
			if (typeof resolve != "function" || typeof reject != "function") {
				throw TypeError("Not a function");
			}

			resolve(msg);
		});
	});

	builtInProp(Promise,"reject",function Promise$reject(msg) {
		return new this(function executor(resolve,reject){
			if (typeof resolve != "function" || typeof reject != "function") {
				throw TypeError("Not a function");
			}

			reject(msg);
		});
	});

	builtInProp(Promise,"all",function Promise$all(arr) {
		var Constructor = this;

		// spec mandated checks
		if (ToString.call(arr) != "[object Array]") {
			return Constructor.reject(TypeError("Not an array"));
		}
		if (arr.length === 0) {
			return Constructor.resolve([]);
		}

		return new Constructor(function executor(resolve,reject){
			if (typeof resolve != "function" || typeof reject != "function") {
				throw TypeError("Not a function");
			}

			var len = arr.length, msgs = Array(len), count = 0;

			iteratePromises(Constructor,arr,function resolver(idx,msg) {
				msgs[idx] = msg;
				if (++count === len) {
					resolve(msgs);
				}
			},reject);
		});
	});

	builtInProp(Promise,"race",function Promise$race(arr) {
		var Constructor = this;

		// spec mandated checks
		if (ToString.call(arr) != "[object Array]") {
			return Constructor.reject(TypeError("Not an array"));
		}

		return new Constructor(function executor(resolve,reject){
			if (typeof resolve != "function" || typeof reject != "function") {
				throw TypeError("Not a function");
			}

			iteratePromises(Constructor,arr,function resolver(idx,msg){
				resolve(msg);
			},reject);
		});
	});

	return Promise;
});

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}],89:[function(require,module,exports){
(function (process){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// resolves . and .. elements in a path array with directory names there
// must be no slashes, empty elements, or device names (c:\) in the array
// (so also no leading and trailing slashes - it does not distinguish
// relative and absolute paths)
function normalizeArray(parts, allowAboveRoot) {
  // if the path tries to go above the root, `up` ends up > 0
  var up = 0;
  for (var i = parts.length - 1; i >= 0; i--) {
    var last = parts[i];
    if (last === '.') {
      parts.splice(i, 1);
    } else if (last === '..') {
      parts.splice(i, 1);
      up++;
    } else if (up) {
      parts.splice(i, 1);
      up--;
    }
  }

  // if the path is allowed to go above the root, restore leading ..s
  if (allowAboveRoot) {
    for (; up--; up) {
      parts.unshift('..');
    }
  }

  return parts;
}

// Split a filename into [root, dir, basename, ext], unix version
// 'root' is just a slash, or nothing.
var splitPathRe =
    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
var splitPath = function(filename) {
  return splitPathRe.exec(filename).slice(1);
};

// path.resolve([from ...], to)
// posix version
exports.resolve = function() {
  var resolvedPath = '',
      resolvedAbsolute = false;

  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
    var path = (i >= 0) ? arguments[i] : process.cwd();

    // Skip empty and invalid entries
    if (typeof path !== 'string') {
      throw new TypeError('Arguments to path.resolve must be strings');
    } else if (!path) {
      continue;
    }

    resolvedPath = path + '/' + resolvedPath;
    resolvedAbsolute = path.charAt(0) === '/';
  }

  // At this point the path should be resolved to a full absolute path, but
  // handle relative paths to be safe (might happen when process.cwd() fails)

  // Normalize the path
  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
    return !!p;
  }), !resolvedAbsolute).join('/');

  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
};

// path.normalize(path)
// posix version
exports.normalize = function(path) {
  var isAbsolute = exports.isAbsolute(path),
      trailingSlash = substr(path, -1) === '/';

  // Normalize the path
  path = normalizeArray(filter(path.split('/'), function(p) {
    return !!p;
  }), !isAbsolute).join('/');

  if (!path && !isAbsolute) {
    path = '.';
  }
  if (path && trailingSlash) {
    path += '/';
  }

  return (isAbsolute ? '/' : '') + path;
};

// posix version
exports.isAbsolute = function(path) {
  return path.charAt(0) === '/';
};

// posix version
exports.join = function() {
  var paths = Array.prototype.slice.call(arguments, 0);
  return exports.normalize(filter(paths, function(p, index) {
    if (typeof p !== 'string') {
      throw new TypeError('Arguments to path.join must be strings');
    }
    return p;
  }).join('/'));
};


// path.relative(from, to)
// posix version
exports.relative = function(from, to) {
  from = exports.resolve(from).substr(1);
  to = exports.resolve(to).substr(1);

  function trim(arr) {
    var start = 0;
    for (; start < arr.length; start++) {
      if (arr[start] !== '') break;
    }

    var end = arr.length - 1;
    for (; end >= 0; end--) {
      if (arr[end] !== '') break;
    }

    if (start > end) return [];
    return arr.slice(start, end - start + 1);
  }

  var fromParts = trim(from.split('/'));
  var toParts = trim(to.split('/'));

  var length = Math.min(fromParts.length, toParts.length);
  var samePartsLength = length;
  for (var i = 0; i < length; i++) {
    if (fromParts[i] !== toParts[i]) {
      samePartsLength = i;
      break;
    }
  }

  var outputParts = [];
  for (var i = samePartsLength; i < fromParts.length; i++) {
    outputParts.push('..');
  }

  outputParts = outputParts.concat(toParts.slice(samePartsLength));

  return outputParts.join('/');
};

exports.sep = '/';
exports.delimiter = ':';

exports.dirname = function(path) {
  var result = splitPath(path),
      root = result[0],
      dir = result[1];

  if (!root && !dir) {
    // No dirname whatsoever
    return '.';
  }

  if (dir) {
    // It has a dirname, strip trailing slash
    dir = dir.substr(0, dir.length - 1);
  }

  return root + dir;
};


exports.basename = function(path, ext) {
  var f = splitPath(path)[2];
  // TODO: make this comparison case-insensitive on windows?
  if (ext && f.substr(-1 * ext.length) === ext) {
    f = f.substr(0, f.length - ext.length);
  }
  return f;
};


exports.extname = function(path) {
  return splitPath(path)[3];
};

function filter (xs, f) {
    if (xs.filter) return xs.filter(f);
    var res = [];
    for (var i = 0; i < xs.length; i++) {
        if (f(xs[i], i, xs)) res.push(xs[i]);
    }
    return res;
}

// String.prototype.substr - negative index don't work in IE8
var substr = 'ab'.substr(-1) === 'b'
    ? function (str, start, len) { return str.substr(start, len) }
    : function (str, start, len) {
        if (start < 0) start = str.length + start;
        return str.substr(start, len);
    }
;

}).call(this,require('_process'))

},{"_process":93}],90:[function(require,module,exports){
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Jeremy Whitlock
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

'use strict';

/**
 * Utility that provides a single API for loading the content of a path/URL.
 *
 * @module PathLoader
 */

var supportedLoaders = {
  file: require('./lib/loaders/file'),
  http: require('./lib/loaders/http'),
  https: require('./lib/loaders/http')
};
var defaultLoader = typeof window === 'object' || typeof importScripts === 'function' ?
      supportedLoaders.http :
      supportedLoaders.file;

// Load promises polyfill if necessary
/* istanbul ignore if */
if (typeof Promise === 'undefined') {
  require('native-promise-only');
}

function getScheme (location) {
  if (typeof location !== 'undefined') {
    location = location.indexOf('://') === -1 ? '' : location.split('://')[0];
  }

  return location;
}

/**
 * Callback used to provide access to altering a remote request prior to the request being made.
 *
 * @typedef {function} PrepareRequestCallback
 *
 * @param {object} req - The Superagent request object
 * @param {string} location - The location being retrieved
 * @param {function} callback - First callback
 *
 * @alias module:PathLoader~PrepareRequestCallback
 */

 /**
  * Callback used to provide access to processing the raw response of the request being made. *(HTTP loader only)*
  *
  * @typedef {function} ProcessResponseCallback
  *
  * @param {object} res - The Superagent response object *(For non-HTTP loaders, this object will be like the Superagent
  * object in that it will have a `text` property whose value is the raw string value being processed.  This was done
  * for consistency.)*
  * @param {function} callback - Error-first callback
  *
  * @returns {*} the result of processing the responsexs
  *
  * @alias module:PathLoader~ProcessResponseCallback
  */

function getLoader (location) {
  var scheme = getScheme(location);
  var loader = supportedLoaders[scheme];

  if (typeof loader === 'undefined') {
    if (scheme === '') {
      loader = defaultLoader;
    } else {
      throw new Error('Unsupported scheme: ' + scheme);
    }
  }

  return loader;
}

/**
 * Loads a document at the provided location and returns a JavaScript object representation.
 *
 * @param {object} location - The location to the document
 * @param {object} [options] - The options
 * @param {string} [options.encoding='utf-8'] - The encoding to use when loading the file *(File loader only)*
 * @param {string} [options.method=get] - The HTTP method to use for the request *(HTTP loader only)*
 * @param {module:PathLoader~PrepareRequestCallback} [options.prepareRequest] - The callback used to prepare the request
 * *(HTTP loader only)*
 * @param {module:PathLoader~ProcessResponseCallback} [options.processContent] - The callback used to process the
 * response
 *
 * @returns {Promise} Always returns a promise even if there is a callback provided
 *
 * @example
 * // Example using Promises
 *
 * PathLoader
 *   .load('./package.json')
 *   .then(JSON.parse)
 *   .then(function (document) {
 *     console.log(document.name + ' (' + document.version + '): ' + document.description);
 *   }, function (err) {
 *     console.error(err.stack);
 *   });
 *
 * @example
 * // Example using options.prepareRequest to provide authentication details for a remotely secure URL
 *
 * PathLoader
 *   .load('https://api.github.com/repos/whitlockjc/path-loader', {
 *     prepareRequest: function (req, callback) {
 *       req.auth('my-username', 'my-password');
 *       callback(undefined, req);
 *     }
 *   })
 *   .then(JSON.parse)
 *   .then(function (document) {
 *     console.log(document.full_name + ': ' + document.description);
 *   }, function (err) {
 *     console.error(err.stack);
 *   });
 *
 * @example
 * // Example loading a YAML file
 *
 * PathLoader
 *   .load('/Users/not-you/projects/path-loader/.travis.yml')
 *   .then(YAML.safeLoad)
 *   .then(function (document) {
 *     console.log('path-loader uses the', document.language, 'language.');
 *   }, function (err) {
 *     console.error(err.stack);
 *   });
 *
 * @example
 * // Example loading a YAML file with options.processContent (Useful if you need information in the raw response)
 *
 * PathLoader
 *   .load('/Users/not-you/projects/path-loader/.travis.yml', {
 *     processContent: function (res, callback) {
 *       callback(YAML.safeLoad(res.text));
 *     }
 *   })
 *   .then(function (document) {
 *     console.log('path-loader uses the', document.language, 'language.');
 *   }, function (err) {
 *     console.error(err.stack);
 *   });
 */
module.exports.load = function (location, options) {
  var allTasks = Promise.resolve();

  // Default options to empty object
  if (typeof options === 'undefined') {
    options = {};
  }

  // Validate arguments
  allTasks = allTasks.then(function () {
    if (typeof location === 'undefined') {
      throw new TypeError('location is required');
    } else if (typeof location !== 'string') {
      throw new TypeError('location must be a string');
    }

    if (typeof options !== 'undefined') {
      if (typeof options !== 'object') {
        throw new TypeError('options must be an object');
      } else if (typeof options.processContent !== 'undefined' && typeof options.processContent !== 'function') {
        throw new TypeError('options.processContent must be a function');
      }
    }
  });

  // Load the document from the provided location and process it
  allTasks = allTasks
    .then(function () {
      return new Promise(function (resolve, reject) {
        var loader = getLoader(location);

        loader.load(location, options || {}, function (err, document) {
          if (err) {
            reject(err);
          } else {
            resolve(document);
          }
        });
      });
    })
    .then(function (res) {
      if (options.processContent) {
        return new Promise(function (resolve, reject) {
          // For consistency between file and http, always send an object with a 'text' property containing the raw
          // string value being processed.
          options.processContent(typeof res === 'object' ? res : {text: res}, function (err, processed) {
            if (err) {
              reject(err);
            } else {
              resolve(processed);
            }
          });
        });
      } else {
        // If there was no content processor, we will assume that for all objects that it is a Superagent response
        // and will return its `text` property value.  Otherwise, we will return the raw response.
        return typeof res === 'object' ? res.text : res;
      }
    });

  return allTasks;
};

},{"./lib/loaders/file":91,"./lib/loaders/http":92,"native-promise-only":88}],91:[function(require,module,exports){
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Jeremy Whitlock
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

'use strict';

var unsupportedError = new TypeError('The \'file\' scheme is not supported in the browser');

/**
 * The file loader is not supported in the browser.
 *
 * @throws {error} the file loader is not supported in the browser
 */
module.exports.getBase = function () {
  throw unsupportedError;
};

/**
 * The file loader is not supported in the browser.
 */
module.exports.load = function () {
  var fn = arguments[arguments.length - 1];

  if (typeof fn === 'function') {
    fn(unsupportedError);
  } else {
    throw unsupportedError;
  }
};

},{}],92:[function(require,module,exports){
/* eslint-env node, browser */

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Jeremy Whitlock
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

'use strict';

var request = require('superagent');

var supportedHttpMethods = ['delete', 'get', 'head', 'patch', 'post', 'put'];

/**
 * Loads a file from an http or https URL.
 *
 * @param {string} location - The document URL (If relative, location is relative to window.location.origin).
 * @param {object} options - The loader options
 * @param {string} [options.method=get] - The HTTP method to use for the request
 * @param {module:PathLoader~PrepareRequestCallback} [options.prepareRequest] - The callback used to prepare a request
 * @param {module:PathLoader~ProcessResponseCallback} [options.processContent] - The callback used to process the
 * response
 * @param {function} callback - The error-first callback
 */
module.exports.load = function (location, options, callback) {
  var realMethod = options.method ? options.method.toLowerCase() : 'get';
  var err;
  var realRequest;

  function makeRequest (err, req) {
    if (err) {
      callback(err);
    } else {
      // buffer() is only available in Node.js
      if (typeof req.buffer === 'function') {
        req.buffer(true);
      }

      req
        .end(function (err2, res) {
          if (err2) {
            callback(err2);
          } else {
            callback(undefined, res);
          }
        });
    }
  }

  if (typeof options.method !== 'undefined') {
    if (typeof options.method !== 'string') {
      err = new TypeError('options.method must be a string');
    } else if (supportedHttpMethods.indexOf(options.method) === -1) {
      err = new TypeError('options.method must be one of the following: ' +
        supportedHttpMethods.slice(0, supportedHttpMethods.length - 1).join(', ') + ' or ' +
        supportedHttpMethods[supportedHttpMethods.length - 1]);
    }
  } else if (typeof options.prepareRequest !== 'undefined' && typeof options.prepareRequest !== 'function') {
    err = new TypeError('options.prepareRequest must be a function');
  }

  if (!err) {
    realRequest = request[realMethod === 'delete' ? 'del' : realMethod](location);

    if (options.prepareRequest) {
      try {
        options.prepareRequest(realRequest, makeRequest);
      } catch (err2) {
        callback(err2);
      }
    } else {
      makeRequest(undefined, realRequest);
    }
  } else {
    callback(err);
  }
};

},{"superagent":100}],93:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],94:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

// If obj.hasOwnProperty has been overridden, then calling
// obj.hasOwnProperty(prop) will break.
// See: https://github.com/joyent/node/issues/1707
function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

module.exports = function(qs, sep, eq, options) {
  sep = sep || '&';
  eq = eq || '=';
  var obj = {};

  if (typeof qs !== 'string' || qs.length === 0) {
    return obj;
  }

  var regexp = /\+/g;
  qs = qs.split(sep);

  var maxKeys = 1000;
  if (options && typeof options.maxKeys === 'number') {
    maxKeys = options.maxKeys;
  }

  var len = qs.length;
  // maxKeys <= 0 means that we should not limit keys count
  if (maxKeys > 0 && len > maxKeys) {
    len = maxKeys;
  }

  for (var i = 0; i < len; ++i) {
    var x = qs[i].replace(regexp, '%20'),
        idx = x.indexOf(eq),
        kstr, vstr, k, v;

    if (idx >= 0) {
      kstr = x.substr(0, idx);
      vstr = x.substr(idx + 1);
    } else {
      kstr = x;
      vstr = '';
    }

    k = decodeURIComponent(kstr);
    v = decodeURIComponent(vstr);

    if (!hasOwnProperty(obj, k)) {
      obj[k] = v;
    } else if (isArray(obj[k])) {
      obj[k].push(v);
    } else {
      obj[k] = [obj[k], v];
    }
  }

  return obj;
};

var isArray = Array.isArray || function (xs) {
  return Object.prototype.toString.call(xs) === '[object Array]';
};

},{}],95:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

var stringifyPrimitive = function(v) {
  switch (typeof v) {
    case 'string':
      return v;

    case 'boolean':
      return v ? 'true' : 'false';

    case 'number':
      return isFinite(v) ? v : '';

    default:
      return '';
  }
};

module.exports = function(obj, sep, eq, name) {
  sep = sep || '&';
  eq = eq || '=';
  if (obj === null) {
    obj = undefined;
  }

  if (typeof obj === 'object') {
    return map(objectKeys(obj), function(k) {
      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
      if (isArray(obj[k])) {
        return map(obj[k], function(v) {
          return ks + encodeURIComponent(stringifyPrimitive(v));
        }).join(sep);
      } else {
        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
      }
    }).join(sep);

  }

  if (!name) return '';
  return encodeURIComponent(stringifyPrimitive(name)) + eq +
         encodeURIComponent(stringifyPrimitive(obj));
};

var isArray = Array.isArray || function (xs) {
  return Object.prototype.toString.call(xs) === '[object Array]';
};

function map (xs, f) {
  if (xs.map) return xs.map(f);
  var res = [];
  for (var i = 0; i < xs.length; i++) {
    res.push(f(xs[i], i));
  }
  return res;
}

var objectKeys = Object.keys || function (obj) {
  var res = [];
  for (var key in obj) {
    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);
  }
  return res;
};

},{}],96:[function(require,module,exports){
'use strict';

exports.decode = exports.parse = require('./decode');
exports.encode = exports.stringify = require('./encode');

},{"./decode":94,"./encode":95}],97:[function(require,module,exports){
'use strict';
module.exports = function (str) {
	var isExtendedLengthPath = /^\\\\\?\\/.test(str);
	var hasNonAscii = /[^\x00-\x80]+/.test(str);

	if (isExtendedLengthPath || hasNonAscii) {
		return str;
	}

	return str.replace(/\\/g, '/');
};

},{}],98:[function(require,module,exports){
(function (factory) {
    if (typeof exports === 'object') {
        // Node/CommonJS
        module.exports = factory();
    } else if (typeof define === 'function' && define.amd) {
        // AMD
        define(factory);
    } else {
        // Browser globals (with support for web workers)
        var glob;

        try {
            glob = window;
        } catch (e) {
            glob = self;
        }

        glob.SparkMD5 = factory();
    }
}(function (undefined) {

    'use strict';

    /*
     * Fastest md5 implementation around (JKM md5).
     * Credits: Joseph Myers
     *
     * @see http://www.myersdaily.org/joseph/javascript/md5-text.html
     * @see http://jsperf.com/md5-shootout/7
     */

    /* this function is much faster,
      so if possible we use it. Some IEs
      are the only ones I know of that
      need the idiotic second function,
      generated by an if clause.  */
    var add32 = function (a, b) {
        return (a + b) & 0xFFFFFFFF;
    },
        hex_chr = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];


    function cmn(q, a, b, x, s, t) {
        a = add32(add32(a, q), add32(x, t));
        return add32((a << s) | (a >>> (32 - s)), b);
    }

    function md5cycle(x, k) {
        var a = x[0],
            b = x[1],
            c = x[2],
            d = x[3];

        a += (b & c | ~b & d) + k[0] - 680876936 | 0;
        a  = (a << 7 | a >>> 25) + b | 0;
        d += (a & b | ~a & c) + k[1] - 389564586 | 0;
        d  = (d << 12 | d >>> 20) + a | 0;
        c += (d & a | ~d & b) + k[2] + 606105819 | 0;
        c  = (c << 17 | c >>> 15) + d | 0;
        b += (c & d | ~c & a) + k[3] - 1044525330 | 0;
        b  = (b << 22 | b >>> 10) + c | 0;
        a += (b & c | ~b & d) + k[4] - 176418897 | 0;
        a  = (a << 7 | a >>> 25) + b | 0;
        d += (a & b | ~a & c) + k[5] + 1200080426 | 0;
        d  = (d << 12 | d >>> 20) + a | 0;
        c += (d & a | ~d & b) + k[6] - 1473231341 | 0;
        c  = (c << 17 | c >>> 15) + d | 0;
        b += (c & d | ~c & a) + k[7] - 45705983 | 0;
        b  = (b << 22 | b >>> 10) + c | 0;
        a += (b & c | ~b & d) + k[8] + 1770035416 | 0;
        a  = (a << 7 | a >>> 25) + b | 0;
        d += (a & b | ~a & c) + k[9] - 1958414417 | 0;
        d  = (d << 12 | d >>> 20) + a | 0;
        c += (d & a | ~d & b) + k[10] - 42063 | 0;
        c  = (c << 17 | c >>> 15) + d | 0;
        b += (c & d | ~c & a) + k[11] - 1990404162 | 0;
        b  = (b << 22 | b >>> 10) + c | 0;
        a += (b & c | ~b & d) + k[12] + 1804603682 | 0;
        a  = (a << 7 | a >>> 25) + b | 0;
        d += (a & b | ~a & c) + k[13] - 40341101 | 0;
        d  = (d << 12 | d >>> 20) + a | 0;
        c += (d & a | ~d & b) + k[14] - 1502002290 | 0;
        c  = (c << 17 | c >>> 15) + d | 0;
        b += (c & d | ~c & a) + k[15] + 1236535329 | 0;
        b  = (b << 22 | b >>> 10) + c | 0;

        a += (b & d | c & ~d) + k[1] - 165796510 | 0;
        a  = (a << 5 | a >>> 27) + b | 0;
        d += (a & c | b & ~c) + k[6] - 1069501632 | 0;
        d  = (d << 9 | d >>> 23) + a | 0;
        c += (d & b | a & ~b) + k[11] + 643717713 | 0;
        c  = (c << 14 | c >>> 18) + d | 0;
        b += (c & a | d & ~a) + k[0] - 373897302 | 0;
        b  = (b << 20 | b >>> 12) + c | 0;
        a += (b & d | c & ~d) + k[5] - 701558691 | 0;
        a  = (a << 5 | a >>> 27) + b | 0;
        d += (a & c | b & ~c) + k[10] + 38016083 | 0;
        d  = (d << 9 | d >>> 23) + a | 0;
        c += (d & b | a & ~b) + k[15] - 660478335 | 0;
        c  = (c << 14 | c >>> 18) + d | 0;
        b += (c & a | d & ~a) + k[4] - 405537848 | 0;
        b  = (b << 20 | b >>> 12) + c | 0;
        a += (b & d | c & ~d) + k[9] + 568446438 | 0;
        a  = (a << 5 | a >>> 27) + b | 0;
        d += (a & c | b & ~c) + k[14] - 1019803690 | 0;
        d  = (d << 9 | d >>> 23) + a | 0;
        c += (d & b | a & ~b) + k[3] - 187363961 | 0;
        c  = (c << 14 | c >>> 18) + d | 0;
        b += (c & a | d & ~a) + k[8] + 1163531501 | 0;
        b  = (b << 20 | b >>> 12) + c | 0;
        a += (b & d | c & ~d) + k[13] - 1444681467 | 0;
        a  = (a << 5 | a >>> 27) + b | 0;
        d += (a & c | b & ~c) + k[2] - 51403784 | 0;
        d  = (d << 9 | d >>> 23) + a | 0;
        c += (d & b | a & ~b) + k[7] + 1735328473 | 0;
        c  = (c << 14 | c >>> 18) + d | 0;
        b += (c & a | d & ~a) + k[12] - 1926607734 | 0;
        b  = (b << 20 | b >>> 12) + c | 0;

        a += (b ^ c ^ d) + k[5] - 378558 | 0;
        a  = (a << 4 | a >>> 28) + b | 0;
        d += (a ^ b ^ c) + k[8] - 2022574463 | 0;
        d  = (d << 11 | d >>> 21) + a | 0;
        c += (d ^ a ^ b) + k[11] + 1839030562 | 0;
        c  = (c << 16 | c >>> 16) + d | 0;
        b += (c ^ d ^ a) + k[14] - 35309556 | 0;
        b  = (b << 23 | b >>> 9) + c | 0;
        a += (b ^ c ^ d) + k[1] - 1530992060 | 0;
        a  = (a << 4 | a >>> 28) + b | 0;
        d += (a ^ b ^ c) + k[4] + 1272893353 | 0;
        d  = (d << 11 | d >>> 21) + a | 0;
        c += (d ^ a ^ b) + k[7] - 155497632 | 0;
        c  = (c << 16 | c >>> 16) + d | 0;
        b += (c ^ d ^ a) + k[10] - 1094730640 | 0;
        b  = (b << 23 | b >>> 9) + c | 0;
        a += (b ^ c ^ d) + k[13] + 681279174 | 0;
        a  = (a << 4 | a >>> 28) + b | 0;
        d += (a ^ b ^ c) + k[0] - 358537222 | 0;
        d  = (d << 11 | d >>> 21) + a | 0;
        c += (d ^ a ^ b) + k[3] - 722521979 | 0;
        c  = (c << 16 | c >>> 16) + d | 0;
        b += (c ^ d ^ a) + k[6] + 76029189 | 0;
        b  = (b << 23 | b >>> 9) + c | 0;
        a += (b ^ c ^ d) + k[9] - 640364487 | 0;
        a  = (a << 4 | a >>> 28) + b | 0;
        d += (a ^ b ^ c) + k[12] - 421815835 | 0;
        d  = (d << 11 | d >>> 21) + a | 0;
        c += (d ^ a ^ b) + k[15] + 530742520 | 0;
        c  = (c << 16 | c >>> 16) + d | 0;
        b += (c ^ d ^ a) + k[2] - 995338651 | 0;
        b  = (b << 23 | b >>> 9) + c | 0;

        a += (c ^ (b | ~d)) + k[0] - 198630844 | 0;
        a  = (a << 6 | a >>> 26) + b | 0;
        d += (b ^ (a | ~c)) + k[7] + 1126891415 | 0;
        d  = (d << 10 | d >>> 22) + a | 0;
        c += (a ^ (d | ~b)) + k[14] - 1416354905 | 0;
        c  = (c << 15 | c >>> 17) + d | 0;
        b += (d ^ (c | ~a)) + k[5] - 57434055 | 0;
        b  = (b << 21 |b >>> 11) + c | 0;
        a += (c ^ (b | ~d)) + k[12] + 1700485571 | 0;
        a  = (a << 6 | a >>> 26) + b | 0;
        d += (b ^ (a | ~c)) + k[3] - 1894986606 | 0;
        d  = (d << 10 | d >>> 22) + a | 0;
        c += (a ^ (d | ~b)) + k[10] - 1051523 | 0;
        c  = (c << 15 | c >>> 17) + d | 0;
        b += (d ^ (c | ~a)) + k[1] - 2054922799 | 0;
        b  = (b << 21 |b >>> 11) + c | 0;
        a += (c ^ (b | ~d)) + k[8] + 1873313359 | 0;
        a  = (a << 6 | a >>> 26) + b | 0;
        d += (b ^ (a | ~c)) + k[15] - 30611744 | 0;
        d  = (d << 10 | d >>> 22) + a | 0;
        c += (a ^ (d | ~b)) + k[6] - 1560198380 | 0;
        c  = (c << 15 | c >>> 17) + d | 0;
        b += (d ^ (c | ~a)) + k[13] + 1309151649 | 0;
        b  = (b << 21 |b >>> 11) + c | 0;
        a += (c ^ (b | ~d)) + k[4] - 145523070 | 0;
        a  = (a << 6 | a >>> 26) + b | 0;
        d += (b ^ (a | ~c)) + k[11] - 1120210379 | 0;
        d  = (d << 10 | d >>> 22) + a | 0;
        c += (a ^ (d | ~b)) + k[2] + 718787259 | 0;
        c  = (c << 15 | c >>> 17) + d | 0;
        b += (d ^ (c | ~a)) + k[9] - 343485551 | 0;
        b  = (b << 21 | b >>> 11) + c | 0;

        x[0] = a + x[0] | 0;
        x[1] = b + x[1] | 0;
        x[2] = c + x[2] | 0;
        x[3] = d + x[3] | 0;
    }

    function md5blk(s) {
        var md5blks = [],
            i; /* Andy King said do it this way. */

        for (i = 0; i < 64; i += 4) {
            md5blks[i >> 2] = s.charCodeAt(i) + (s.charCodeAt(i + 1) << 8) + (s.charCodeAt(i + 2) << 16) + (s.charCodeAt(i + 3) << 24);
        }
        return md5blks;
    }

    function md5blk_array(a) {
        var md5blks = [],
            i; /* Andy King said do it this way. */

        for (i = 0; i < 64; i += 4) {
            md5blks[i >> 2] = a[i] + (a[i + 1] << 8) + (a[i + 2] << 16) + (a[i + 3] << 24);
        }
        return md5blks;
    }

    function md51(s) {
        var n = s.length,
            state = [1732584193, -271733879, -1732584194, 271733878],
            i,
            length,
            tail,
            tmp,
            lo,
            hi;

        for (i = 64; i <= n; i += 64) {
            md5cycle(state, md5blk(s.substring(i - 64, i)));
        }
        s = s.substring(i - 64);
        length = s.length;
        tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        for (i = 0; i < length; i += 1) {
            tail[i >> 2] |= s.charCodeAt(i) << ((i % 4) << 3);
        }
        tail[i >> 2] |= 0x80 << ((i % 4) << 3);
        if (i > 55) {
            md5cycle(state, tail);
            for (i = 0; i < 16; i += 1) {
                tail[i] = 0;
            }
        }

        // Beware that the final length might not fit in 32 bits so we take care of that
        tmp = n * 8;
        tmp = tmp.toString(16).match(/(.*?)(.{0,8})$/);
        lo = parseInt(tmp[2], 16);
        hi = parseInt(tmp[1], 16) || 0;

        tail[14] = lo;
        tail[15] = hi;

        md5cycle(state, tail);
        return state;
    }

    function md51_array(a) {
        var n = a.length,
            state = [1732584193, -271733879, -1732584194, 271733878],
            i,
            length,
            tail,
            tmp,
            lo,
            hi;

        for (i = 64; i <= n; i += 64) {
            md5cycle(state, md5blk_array(a.subarray(i - 64, i)));
        }

        // Not sure if it is a bug, however IE10 will always produce a sub array of length 1
        // containing the last element of the parent array if the sub array specified starts
        // beyond the length of the parent array - weird.
        // https://connect.microsoft.com/IE/feedback/details/771452/typed-array-subarray-issue
        a = (i - 64) < n ? a.subarray(i - 64) : new Uint8Array(0);

        length = a.length;
        tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        for (i = 0; i < length; i += 1) {
            tail[i >> 2] |= a[i] << ((i % 4) << 3);
        }

        tail[i >> 2] |= 0x80 << ((i % 4) << 3);
        if (i > 55) {
            md5cycle(state, tail);
            for (i = 0; i < 16; i += 1) {
                tail[i] = 0;
            }
        }

        // Beware that the final length might not fit in 32 bits so we take care of that
        tmp = n * 8;
        tmp = tmp.toString(16).match(/(.*?)(.{0,8})$/);
        lo = parseInt(tmp[2], 16);
        hi = parseInt(tmp[1], 16) || 0;

        tail[14] = lo;
        tail[15] = hi;

        md5cycle(state, tail);

        return state;
    }

    function rhex(n) {
        var s = '',
            j;
        for (j = 0; j < 4; j += 1) {
            s += hex_chr[(n >> (j * 8 + 4)) & 0x0F] + hex_chr[(n >> (j * 8)) & 0x0F];
        }
        return s;
    }

    function hex(x) {
        var i;
        for (i = 0; i < x.length; i += 1) {
            x[i] = rhex(x[i]);
        }
        return x.join('');
    }

    // In some cases the fast add32 function cannot be used..
    if (hex(md51('hello')) !== '5d41402abc4b2a76b9719d911017c592') {
        add32 = function (x, y) {
            var lsw = (x & 0xFFFF) + (y & 0xFFFF),
                msw = (x >> 16) + (y >> 16) + (lsw >> 16);
            return (msw << 16) | (lsw & 0xFFFF);
        };
    }

    // ---------------------------------------------------

    /**
     * ArrayBuffer slice polyfill.
     *
     * @see https://github.com/ttaubert/node-arraybuffer-slice
     */

    if (typeof ArrayBuffer !== 'undefined' && !ArrayBuffer.prototype.slice) {
        (function () {
            function clamp(val, length) {
                val = (val | 0) || 0;

                if (val < 0) {
                    return Math.max(val + length, 0);
                }

                return Math.min(val, length);
            }

            ArrayBuffer.prototype.slice = function (from, to) {
                var length = this.byteLength,
                    begin = clamp(from, length),
                    end = length,
                    num,
                    target,
                    targetArray,
                    sourceArray;

                if (to !== undefined) {
                    end = clamp(to, length);
                }

                if (begin > end) {
                    return new ArrayBuffer(0);
                }

                num = end - begin;
                target = new ArrayBuffer(num);
                targetArray = new Uint8Array(target);

                sourceArray = new Uint8Array(this, begin, num);
                targetArray.set(sourceArray);

                return target;
            };
        })();
    }

    // ---------------------------------------------------

    /**
     * Helpers.
     */

    function toUtf8(str) {
        if (/[\u0080-\uFFFF]/.test(str)) {
            str = unescape(encodeURIComponent(str));
        }

        return str;
    }

    function utf8Str2ArrayBuffer(str, returnUInt8Array) {
        var length = str.length,
           buff = new ArrayBuffer(length),
           arr = new Uint8Array(buff),
           i;

        for (i = 0; i < length; i += 1) {
            arr[i] = str.charCodeAt(i);
        }

        return returnUInt8Array ? arr : buff;
    }

    function arrayBuffer2Utf8Str(buff) {
        return String.fromCharCode.apply(null, new Uint8Array(buff));
    }

    function concatenateArrayBuffers(first, second, returnUInt8Array) {
        var result = new Uint8Array(first.byteLength + second.byteLength);

        result.set(new Uint8Array(first));
        result.set(new Uint8Array(second), first.byteLength);

        return returnUInt8Array ? result : result.buffer;
    }

    function hexToBinaryString(hex) {
        var bytes = [],
            length = hex.length,
            x;

        for (x = 0; x < length - 1; x += 2) {
            bytes.push(parseInt(hex.substr(x, 2), 16));
        }

        return String.fromCharCode.apply(String, bytes);
    }

    // ---------------------------------------------------

    /**
     * SparkMD5 OOP implementation.
     *
     * Use this class to perform an incremental md5, otherwise use the
     * static methods instead.
     */

    function SparkMD5() {
        // call reset to init the instance
        this.reset();
    }

    /**
     * Appends a string.
     * A conversion will be applied if an utf8 string is detected.
     *
     * @param {String} str The string to be appended
     *
     * @return {SparkMD5} The instance itself
     */
    SparkMD5.prototype.append = function (str) {
        // Converts the string to utf8 bytes if necessary
        // Then append as binary
        this.appendBinary(toUtf8(str));

        return this;
    };

    /**
     * Appends a binary string.
     *
     * @param {String} contents The binary string to be appended
     *
     * @return {SparkMD5} The instance itself
     */
    SparkMD5.prototype.appendBinary = function (contents) {
        this._buff += contents;
        this._length += contents.length;

        var length = this._buff.length,
            i;

        for (i = 64; i <= length; i += 64) {
            md5cycle(this._hash, md5blk(this._buff.substring(i - 64, i)));
        }

        this._buff = this._buff.substring(i - 64);

        return this;
    };

    /**
     * Finishes the incremental computation, reseting the internal state and
     * returning the result.
     *
     * @param {Boolean} raw True to get the raw string, false to get the hex string
     *
     * @return {String} The result
     */
    SparkMD5.prototype.end = function (raw) {
        var buff = this._buff,
            length = buff.length,
            i,
            tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
            ret;

        for (i = 0; i < length; i += 1) {
            tail[i >> 2] |= buff.charCodeAt(i) << ((i % 4) << 3);
        }

        this._finish(tail, length);
        ret = hex(this._hash);

        if (raw) {
            ret = hexToBinaryString(ret);
        }

        this.reset();

        return ret;
    };

    /**
     * Resets the internal state of the computation.
     *
     * @return {SparkMD5} The instance itself
     */
    SparkMD5.prototype.reset = function () {
        this._buff = '';
        this._length = 0;
        this._hash = [1732584193, -271733879, -1732584194, 271733878];

        return this;
    };

    /**
     * Gets the internal state of the computation.
     *
     * @return {Object} The state
     */
    SparkMD5.prototype.getState = function () {
        return {
            buff: this._buff,
            length: this._length,
            hash: this._hash
        };
    };

    /**
     * Gets the internal state of the computation.
     *
     * @param {Object} state The state
     *
     * @return {SparkMD5} The instance itself
     */
    SparkMD5.prototype.setState = function (state) {
        this._buff = state.buff;
        this._length = state.length;
        this._hash = state.hash;

        return this;
    };

    /**
     * Releases memory used by the incremental buffer and other additional
     * resources. If you plan to use the instance again, use reset instead.
     */
    SparkMD5.prototype.destroy = function () {
        delete this._hash;
        delete this._buff;
        delete this._length;
    };

    /**
     * Finish the final calculation based on the tail.
     *
     * @param {Array}  tail   The tail (will be modified)
     * @param {Number} length The length of the remaining buffer
     */
    SparkMD5.prototype._finish = function (tail, length) {
        var i = length,
            tmp,
            lo,
            hi;

        tail[i >> 2] |= 0x80 << ((i % 4) << 3);
        if (i > 55) {
            md5cycle(this._hash, tail);
            for (i = 0; i < 16; i += 1) {
                tail[i] = 0;
            }
        }

        // Do the final computation based on the tail and length
        // Beware that the final length may not fit in 32 bits so we take care of that
        tmp = this._length * 8;
        tmp = tmp.toString(16).match(/(.*?)(.{0,8})$/);
        lo = parseInt(tmp[2], 16);
        hi = parseInt(tmp[1], 16) || 0;

        tail[14] = lo;
        tail[15] = hi;
        md5cycle(this._hash, tail);
    };

    /**
     * Performs the md5 hash on a string.
     * A conversion will be applied if utf8 string is detected.
     *
     * @param {String}  str The string
     * @param {Boolean} raw True to get the raw string, false to get the hex string
     *
     * @return {String} The result
     */
    SparkMD5.hash = function (str, raw) {
        // Converts the string to utf8 bytes if necessary
        // Then compute it using the binary function
        return SparkMD5.hashBinary(toUtf8(str), raw);
    };

    /**
     * Performs the md5 hash on a binary string.
     *
     * @param {String}  content The binary string
     * @param {Boolean} raw     True to get the raw string, false to get the hex string
     *
     * @return {String} The result
     */
    SparkMD5.hashBinary = function (content, raw) {
        var hash = md51(content),
            ret = hex(hash);

        return raw ? hexToBinaryString(ret) : ret;
    };

    // ---------------------------------------------------

    /**
     * SparkMD5 OOP implementation for array buffers.
     *
     * Use this class to perform an incremental md5 ONLY for array buffers.
     */
    SparkMD5.ArrayBuffer = function () {
        // call reset to init the instance
        this.reset();
    };

    /**
     * Appends an array buffer.
     *
     * @param {ArrayBuffer} arr The array to be appended
     *
     * @return {SparkMD5.ArrayBuffer} The instance itself
     */
    SparkMD5.ArrayBuffer.prototype.append = function (arr) {
        var buff = concatenateArrayBuffers(this._buff.buffer, arr, true),
            length = buff.length,
            i;

        this._length += arr.byteLength;

        for (i = 64; i <= length; i += 64) {
            md5cycle(this._hash, md5blk_array(buff.subarray(i - 64, i)));
        }

        this._buff = (i - 64) < length ? new Uint8Array(buff.buffer.slice(i - 64)) : new Uint8Array(0);

        return this;
    };

    /**
     * Finishes the incremental computation, reseting the internal state and
     * returning the result.
     *
     * @param {Boolean} raw True to get the raw string, false to get the hex string
     *
     * @return {String} The result
     */
    SparkMD5.ArrayBuffer.prototype.end = function (raw) {
        var buff = this._buff,
            length = buff.length,
            tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
            i,
            ret;

        for (i = 0; i < length; i += 1) {
            tail[i >> 2] |= buff[i] << ((i % 4) << 3);
        }

        this._finish(tail, length);
        ret = hex(this._hash);

        if (raw) {
            ret = hexToBinaryString(ret);
        }

        this.reset();

        return ret;
    };

    /**
     * Resets the internal state of the computation.
     *
     * @return {SparkMD5.ArrayBuffer} The instance itself
     */
    SparkMD5.ArrayBuffer.prototype.reset = function () {
        this._buff = new Uint8Array(0);
        this._length = 0;
        this._hash = [1732584193, -271733879, -1732584194, 271733878];

        return this;
    };

    /**
     * Gets the internal state of the computation.
     *
     * @return {Object} The state
     */
    SparkMD5.ArrayBuffer.prototype.getState = function () {
        var state = SparkMD5.prototype.getState.call(this);

        // Convert buffer to a string
        state.buff = arrayBuffer2Utf8Str(state.buff);

        return state;
    };

    /**
     * Gets the internal state of the computation.
     *
     * @param {Object} state The state
     *
     * @return {SparkMD5.ArrayBuffer} The instance itself
     */
    SparkMD5.ArrayBuffer.prototype.setState = function (state) {
        // Convert string to buffer
        state.buff = utf8Str2ArrayBuffer(state.buff, true);

        return SparkMD5.prototype.setState.call(this, state);
    };

    SparkMD5.ArrayBuffer.prototype.destroy = SparkMD5.prototype.destroy;

    SparkMD5.ArrayBuffer.prototype._finish = SparkMD5.prototype._finish;

    /**
     * Performs the md5 hash on an array buffer.
     *
     * @param {ArrayBuffer} arr The array buffer
     * @param {Boolean}     raw True to get the raw string, false to get the hex one
     *
     * @return {String} The result
     */
    SparkMD5.ArrayBuffer.hash = function (arr, raw) {
        var hash = md51_array(new Uint8Array(arr)),
            ret = hex(hash);

        return raw ? hexToBinaryString(ret) : ret;
    };

    return SparkMD5;
}));

},{}],99:[function(require,module,exports){
function Agent() {
  this._defaults = [];
}

["use", "on", "once", "set", "query", "type", "accept", "auth", "withCredentials", "sortQuery", "retry", "ok", "redirects",
 "timeout", "buffer", "serialize", "parse", "ca", "key", "pfx", "cert"].forEach(function(fn) {
  /** Default setting for all requests from this agent */
  Agent.prototype[fn] = function(/*varargs*/) {
    this._defaults.push({fn:fn, arguments:arguments});
    return this;
  }
});

Agent.prototype._setDefaults = function(req) {
    this._defaults.forEach(function(def) {
      req[def.fn].apply(req, def.arguments);
    });
};

module.exports = Agent;

},{}],100:[function(require,module,exports){
/**
 * Root reference for iframes.
 */

var root;
if (typeof window !== 'undefined') { // Browser window
  root = window;
} else if (typeof self !== 'undefined') { // Web Worker
  root = self;
} else { // Other environments
  console.warn("Using browser-only version of superagent in non-browser environment");
  root = this;
}

var Emitter = require('component-emitter');
var RequestBase = require('./request-base');
var isObject = require('./is-object');
var ResponseBase = require('./response-base');
var Agent = require('./agent-base');

/**
 * Noop.
 */

function noop(){};

/**
 * Expose `request`.
 */

var request = exports = module.exports = function(method, url) {
  // callback
  if ('function' == typeof url) {
    return new exports.Request('GET', method).end(url);
  }

  // url first
  if (1 == arguments.length) {
    return new exports.Request('GET', method);
  }

  return new exports.Request(method, url);
}

exports.Request = Request;

/**
 * Determine XHR.
 */

request.getXHR = function () {
  if (root.XMLHttpRequest
      && (!root.location || 'file:' != root.location.protocol
          || !root.ActiveXObject)) {
    return new XMLHttpRequest;
  } else {
    try { return new ActiveXObject('Microsoft.XMLHTTP'); } catch(e) {}
    try { return new ActiveXObject('Msxml2.XMLHTTP.6.0'); } catch(e) {}
    try { return new ActiveXObject('Msxml2.XMLHTTP.3.0'); } catch(e) {}
    try { return new ActiveXObject('Msxml2.XMLHTTP'); } catch(e) {}
  }
  throw Error("Browser-only version of superagent could not find XHR");
};

/**
 * Removes leading and trailing whitespace, added to support IE.
 *
 * @param {String} s
 * @return {String}
 * @api private
 */

var trim = ''.trim
  ? function(s) { return s.trim(); }
  : function(s) { return s.replace(/(^\s*|\s*$)/g, ''); };

/**
 * Serialize the given `obj`.
 *
 * @param {Object} obj
 * @return {String}
 * @api private
 */

function serialize(obj) {
  if (!isObject(obj)) return obj;
  var pairs = [];
  for (var key in obj) {
    pushEncodedKeyValuePair(pairs, key, obj[key]);
  }
  return pairs.join('&');
}

/**
 * Helps 'serialize' with serializing arrays.
 * Mutates the pairs array.
 *
 * @param {Array} pairs
 * @param {String} key
 * @param {Mixed} val
 */

function pushEncodedKeyValuePair(pairs, key, val) {
  if (val != null) {
    if (Array.isArray(val)) {
      val.forEach(function(v) {
        pushEncodedKeyValuePair(pairs, key, v);
      });
    } else if (isObject(val)) {
      for(var subkey in val) {
        pushEncodedKeyValuePair(pairs, key + '[' + subkey + ']', val[subkey]);
      }
    } else {
      pairs.push(encodeURIComponent(key)
        + '=' + encodeURIComponent(val));
    }
  } else if (val === null) {
    pairs.push(encodeURIComponent(key));
  }
}

/**
 * Expose serialization method.
 */

request.serializeObject = serialize;

/**
  * Parse the given x-www-form-urlencoded `str`.
  *
  * @param {String} str
  * @return {Object}
  * @api private
  */

function parseString(str) {
  var obj = {};
  var pairs = str.split('&');
  var pair;
  var pos;

  for (var i = 0, len = pairs.length; i < len; ++i) {
    pair = pairs[i];
    pos = pair.indexOf('=');
    if (pos == -1) {
      obj[decodeURIComponent(pair)] = '';
    } else {
      obj[decodeURIComponent(pair.slice(0, pos))] =
        decodeURIComponent(pair.slice(pos + 1));
    }
  }

  return obj;
}

/**
 * Expose parser.
 */

request.parseString = parseString;

/**
 * Default MIME type map.
 *
 *     superagent.types.xml = 'application/xml';
 *
 */

request.types = {
  html: 'text/html',
  json: 'application/json',
  xml: 'text/xml',
  urlencoded: 'application/x-www-form-urlencoded',
  'form': 'application/x-www-form-urlencoded',
  'form-data': 'application/x-www-form-urlencoded'
};

/**
 * Default serialization map.
 *
 *     superagent.serialize['application/xml'] = function(obj){
 *       return 'generated xml here';
 *     };
 *
 */

request.serialize = {
  'application/x-www-form-urlencoded': serialize,
  'application/json': JSON.stringify,
};

/**
  * Default parsers.
  *
  *     superagent.parse['application/xml'] = function(str){
  *       return { object parsed from str };
  *     };
  *
  */

request.parse = {
  'application/x-www-form-urlencoded': parseString,
  'application/json': JSON.parse,
};

/**
 * Parse the given header `str` into
 * an object containing the mapped fields.
 *
 * @param {String} str
 * @return {Object}
 * @api private
 */

function parseHeader(str) {
  var lines = str.split(/\r?\n/);
  var fields = {};
  var index;
  var line;
  var field;
  var val;

  for (var i = 0, len = lines.length; i < len; ++i) {
    line = lines[i];
    index = line.indexOf(':');
    if (index === -1) { // could be empty line, just skip it
      continue;
    }
    field = line.slice(0, index).toLowerCase();
    val = trim(line.slice(index + 1));
    fields[field] = val;
  }

  return fields;
}

/**
 * Check if `mime` is json or has +json structured syntax suffix.
 *
 * @param {String} mime
 * @return {Boolean}
 * @api private
 */

function isJSON(mime) {
  // should match /json or +json
  // but not /json-seq
  return /[\/+]json($|[^-\w])/.test(mime);
}

/**
 * Initialize a new `Response` with the given `xhr`.
 *
 *  - set flags (.ok, .error, etc)
 *  - parse header
 *
 * Examples:
 *
 *  Aliasing `superagent` as `request` is nice:
 *
 *      request = superagent;
 *
 *  We can use the promise-like API, or pass callbacks:
 *
 *      request.get('/').end(function(res){});
 *      request.get('/', function(res){});
 *
 *  Sending data can be chained:
 *
 *      request
 *        .post('/user')
 *        .send({ name: 'tj' })
 *        .end(function(res){});
 *
 *  Or passed to `.send()`:
 *
 *      request
 *        .post('/user')
 *        .send({ name: 'tj' }, function(res){});
 *
 *  Or passed to `.post()`:
 *
 *      request
 *        .post('/user', { name: 'tj' })
 *        .end(function(res){});
 *
 * Or further reduced to a single call for simple cases:
 *
 *      request
 *        .post('/user', { name: 'tj' }, function(res){});
 *
 * @param {XMLHTTPRequest} xhr
 * @param {Object} options
 * @api private
 */

function Response(req) {
  this.req = req;
  this.xhr = this.req.xhr;
  // responseText is accessible only if responseType is '' or 'text' and on older browsers
  this.text = ((this.req.method !='HEAD' && (this.xhr.responseType === '' || this.xhr.responseType === 'text')) || typeof this.xhr.responseType === 'undefined')
     ? this.xhr.responseText
     : null;
  this.statusText = this.req.xhr.statusText;
  var status = this.xhr.status;
  // handle IE9 bug: http://stackoverflow.com/questions/10046972/msie-returns-status-code-of-1223-for-ajax-request
  if (status === 1223) {
    status = 204;
  }
  this._setStatusProperties(status);
  this.header = this.headers = parseHeader(this.xhr.getAllResponseHeaders());
  // getAllResponseHeaders sometimes falsely returns "" for CORS requests, but
  // getResponseHeader still works. so we get content-type even if getting
  // other headers fails.
  this.header['content-type'] = this.xhr.getResponseHeader('content-type');
  this._setHeaderProperties(this.header);

  if (null === this.text && req._responseType) {
    this.body = this.xhr.response;
  } else {
    this.body = this.req.method != 'HEAD'
      ? this._parseBody(this.text ? this.text : this.xhr.response)
      : null;
  }
}

ResponseBase(Response.prototype);

/**
 * Parse the given body `str`.
 *
 * Used for auto-parsing of bodies. Parsers
 * are defined on the `superagent.parse` object.
 *
 * @param {String} str
 * @return {Mixed}
 * @api private
 */

Response.prototype._parseBody = function(str) {
  var parse = request.parse[this.type];
  if (this.req._parser) {
    return this.req._parser(this, str);
  }
  if (!parse && isJSON(this.type)) {
    parse = request.parse['application/json'];
  }
  return parse && str && (str.length || str instanceof Object)
    ? parse(str)
    : null;
};

/**
 * Return an `Error` representative of this response.
 *
 * @return {Error}
 * @api public
 */

Response.prototype.toError = function(){
  var req = this.req;
  var method = req.method;
  var url = req.url;

  var msg = 'cannot ' + method + ' ' + url + ' (' + this.status + ')';
  var err = new Error(msg);
  err.status = this.status;
  err.method = method;
  err.url = url;

  return err;
};

/**
 * Expose `Response`.
 */

request.Response = Response;

/**
 * Initialize a new `Request` with the given `method` and `url`.
 *
 * @param {String} method
 * @param {String} url
 * @api public
 */

function Request(method, url) {
  var self = this;
  this._query = this._query || [];
  this.method = method;
  this.url = url;
  this.header = {}; // preserves header name case
  this._header = {}; // coerces header names to lowercase
  this.on('end', function(){
    var err = null;
    var res = null;

    try {
      res = new Response(self);
    } catch(e) {
      err = new Error('Parser is unable to parse the response');
      err.parse = true;
      err.original = e;
      // issue #675: return the raw response if the response parsing fails
      if (self.xhr) {
        // ie9 doesn't have 'response' property
        err.rawResponse = typeof self.xhr.responseType == 'undefined' ? self.xhr.responseText : self.xhr.response;
        // issue #876: return the http status code if the response parsing fails
        err.status = self.xhr.status ? self.xhr.status : null;
        err.statusCode = err.status; // backwards-compat only
      } else {
        err.rawResponse = null;
        err.status = null;
      }

      return self.callback(err);
    }

    self.emit('response', res);

    var new_err;
    try {
      if (!self._isResponseOK(res)) {
        new_err = new Error(res.statusText || 'Unsuccessful HTTP response');
      }
    } catch(custom_err) {
      new_err = custom_err; // ok() callback can throw
    }

    // #1000 don't catch errors from the callback to avoid double calling it
    if (new_err) {
      new_err.original = err;
      new_err.response = res;
      new_err.status = res.status;
      self.callback(new_err, res);
    } else {
      self.callback(null, res);
    }
  });
}

/**
 * Mixin `Emitter` and `RequestBase`.
 */

Emitter(Request.prototype);
RequestBase(Request.prototype);

/**
 * Set Content-Type to `type`, mapping values from `request.types`.
 *
 * Examples:
 *
 *      superagent.types.xml = 'application/xml';
 *
 *      request.post('/')
 *        .type('xml')
 *        .send(xmlstring)
 *        .end(callback);
 *
 *      request.post('/')
 *        .type('application/xml')
 *        .send(xmlstring)
 *        .end(callback);
 *
 * @param {String} type
 * @return {Request} for chaining
 * @api public
 */

Request.prototype.type = function(type){
  this.set('Content-Type', request.types[type] || type);
  return this;
};

/**
 * Set Accept to `type`, mapping values from `request.types`.
 *
 * Examples:
 *
 *      superagent.types.json = 'application/json';
 *
 *      request.get('/agent')
 *        .accept('json')
 *        .end(callback);
 *
 *      request.get('/agent')
 *        .accept('application/json')
 *        .end(callback);
 *
 * @param {String} accept
 * @return {Request} for chaining
 * @api public
 */

Request.prototype.accept = function(type){
  this.set('Accept', request.types[type] || type);
  return this;
};

/**
 * Set Authorization field value with `user` and `pass`.
 *
 * @param {String} user
 * @param {String} [pass] optional in case of using 'bearer' as type
 * @param {Object} options with 'type' property 'auto', 'basic' or 'bearer' (default 'basic')
 * @return {Request} for chaining
 * @api public
 */

Request.prototype.auth = function(user, pass, options){
  if (1 === arguments.length) pass = '';
  if (typeof pass === 'object' && pass !== null) { // pass is optional and can be replaced with options
    options = pass;
    pass = '';
  }
  if (!options) {
    options = {
      type: 'function' === typeof btoa ? 'basic' : 'auto',
    };
  }

  var encoder = function(string) {
    if ('function' === typeof btoa) {
      return btoa(string);
    }
    throw new Error('Cannot use basic auth, btoa is not a function');
  };

  return this._auth(user, pass, options, encoder);
};

/**
 * Add query-string `val`.
 *
 * Examples:
 *
 *   request.get('/shoes')
 *     .query('size=10')
 *     .query({ color: 'blue' })
 *
 * @param {Object|String} val
 * @return {Request} for chaining
 * @api public
 */

Request.prototype.query = function(val){
  if ('string' != typeof val) val = serialize(val);
  if (val) this._query.push(val);
  return this;
};

/**
 * Queue the given `file` as an attachment to the specified `field`,
 * with optional `options` (or filename).
 *
 * ``` js
 * request.post('/upload')
 *   .attach('content', new Blob(['<a id="a"><b id="b">hey!</b></a>'], { type: "text/html"}))
 *   .end(callback);
 * ```
 *
 * @param {String} field
 * @param {Blob|File} file
 * @param {String|Object} options
 * @return {Request} for chaining
 * @api public
 */

Request.prototype.attach = function(field, file, options){
  if (file) {
    if (this._data) {
      throw Error("superagent can't mix .send() and .attach()");
    }

    this._getFormData().append(field, file, options || file.name);
  }
  return this;
};

Request.prototype._getFormData = function(){
  if (!this._formData) {
    this._formData = new root.FormData();
  }
  return this._formData;
};

/**
 * Invoke the callback with `err` and `res`
 * and handle arity check.
 *
 * @param {Error} err
 * @param {Response} res
 * @api private
 */

Request.prototype.callback = function(err, res){
  if (this._shouldRetry(err, res)) {
    return this._retry();
  }

  var fn = this._callback;
  this.clearTimeout();

  if (err) {
    if (this._maxRetries) err.retries = this._retries - 1;
    this.emit('error', err);
  }

  fn(err, res);
};

/**
 * Invoke callback with x-domain error.
 *
 * @api private
 */

Request.prototype.crossDomainError = function(){
  var err = new Error('Request has been terminated\nPossible causes: the network is offline, Origin is not allowed by Access-Control-Allow-Origin, the page is being unloaded, etc.');
  err.crossDomain = true;

  err.status = this.status;
  err.method = this.method;
  err.url = this.url;

  this.callback(err);
};

// This only warns, because the request is still likely to work
Request.prototype.buffer = Request.prototype.ca = Request.prototype.agent = function(){
  console.warn("This is not supported in browser version of superagent");
  return this;
};

// This throws, because it can't send/receive data as expected
Request.prototype.pipe = Request.prototype.write = function(){
  throw Error("Streaming is not supported in browser version of superagent");
};

/**
 * Check if `obj` is a host object,
 * we don't want to serialize these :)
 *
 * @param {Object} obj
 * @return {Boolean}
 * @api private
 */
Request.prototype._isHost = function _isHost(obj) {
  // Native objects stringify to [object File], [object Blob], [object FormData], etc.
  return obj && 'object' === typeof obj && !Array.isArray(obj) && Object.prototype.toString.call(obj) !== '[object Object]';
}

/**
 * Initiate request, invoking callback `fn(res)`
 * with an instanceof `Response`.
 *
 * @param {Function} fn
 * @return {Request} for chaining
 * @api public
 */

Request.prototype.end = function(fn){
  if (this._endCalled) {
    console.warn("Warning: .end() was called twice. This is not supported in superagent");
  }
  this._endCalled = true;

  // store callback
  this._callback = fn || noop;

  // querystring
  this._finalizeQueryString();

  return this._end();
};

Request.prototype._end = function() {
  var self = this;
  var xhr = (this.xhr = request.getXHR());
  var data = this._formData || this._data;

  this._setTimeouts();

  // state change
  xhr.onreadystatechange = function(){
    var readyState = xhr.readyState;
    if (readyState >= 2 && self._responseTimeoutTimer) {
      clearTimeout(self._responseTimeoutTimer);
    }
    if (4 != readyState) {
      return;
    }

    // In IE9, reads to any property (e.g. status) off of an aborted XHR will
    // result in the error "Could not complete the operation due to error c00c023f"
    var status;
    try { status = xhr.status } catch(e) { status = 0; }

    if (!status) {
      if (self.timedout || self._aborted) return;
      return self.crossDomainError();
    }
    self.emit('end');
  };

  // progress
  var handleProgress = function(direction, e) {
    if (e.total > 0) {
      e.percent = e.loaded / e.total * 100;
    }
    e.direction = direction;
    self.emit('progress', e);
  };
  if (this.hasListeners('progress')) {
    try {
      xhr.onprogress = handleProgress.bind(null, 'download');
      if (xhr.upload) {
        xhr.upload.onprogress = handleProgress.bind(null, 'upload');
      }
    } catch(e) {
      // Accessing xhr.upload fails in IE from a web worker, so just pretend it doesn't exist.
      // Reported here:
      // https://connect.microsoft.com/IE/feedback/details/837245/xmlhttprequest-upload-throws-invalid-argument-when-used-from-web-worker-context
    }
  }

  // initiate request
  try {
    if (this.username && this.password) {
      xhr.open(this.method, this.url, true, this.username, this.password);
    } else {
      xhr.open(this.method, this.url, true);
    }
  } catch (err) {
    // see #1149
    return this.callback(err);
  }

  // CORS
  if (this._withCredentials) xhr.withCredentials = true;

  // body
  if (!this._formData && 'GET' != this.method && 'HEAD' != this.method && 'string' != typeof data && !this._isHost(data)) {
    // serialize stuff
    var contentType = this._header['content-type'];
    var serialize = this._serializer || request.serialize[contentType ? contentType.split(';')[0] : ''];
    if (!serialize && isJSON(contentType)) {
      serialize = request.serialize['application/json'];
    }
    if (serialize) data = serialize(data);
  }

  // set header fields
  for (var field in this.header) {
    if (null == this.header[field]) continue;

    if (this.header.hasOwnProperty(field))
      xhr.setRequestHeader(field, this.header[field]);
  }

  if (this._responseType) {
    xhr.responseType = this._responseType;
  }

  // send stuff
  this.emit('request', this);

  // IE11 xhr.send(undefined) sends 'undefined' string as POST payload (instead of nothing)
  // We need null here if data is undefined
  xhr.send(typeof data !== 'undefined' ? data : null);
  return this;
};

request.agent = function() {
  return new Agent();
};

["GET", "POST", "OPTIONS", "PATCH", "PUT", "DELETE"].forEach(function(method) {
  Agent.prototype[method.toLowerCase()] = function(url, fn) {
    var req = new request.Request(method, url);
    this._setDefaults(req);
    if (fn) {
      req.end(fn);
    }
    return req;
  };
});

Agent.prototype.del = Agent.prototype['delete'];

/**
 * GET `url` with optional callback `fn(res)`.
 *
 * @param {String} url
 * @param {Mixed|Function} [data] or fn
 * @param {Function} [fn]
 * @return {Request}
 * @api public
 */

request.get = function(url, data, fn) {
  var req = request('GET', url);
  if ('function' == typeof data) (fn = data), (data = null);
  if (data) req.query(data);
  if (fn) req.end(fn);
  return req;
};

/**
 * HEAD `url` with optional callback `fn(res)`.
 *
 * @param {String} url
 * @param {Mixed|Function} [data] or fn
 * @param {Function} [fn]
 * @return {Request}
 * @api public
 */

request.head = function(url, data, fn) {
  var req = request('HEAD', url);
  if ('function' == typeof data) (fn = data), (data = null);
  if (data) req.query(data);
  if (fn) req.end(fn);
  return req;
};

/**
 * OPTIONS query to `url` with optional callback `fn(res)`.
 *
 * @param {String} url
 * @param {Mixed|Function} [data] or fn
 * @param {Function} [fn]
 * @return {Request}
 * @api public
 */

request.options = function(url, data, fn) {
  var req = request('OPTIONS', url);
  if ('function' == typeof data) (fn = data), (data = null);
  if (data) req.send(data);
  if (fn) req.end(fn);
  return req;
};

/**
 * DELETE `url` with optional `data` and callback `fn(res)`.
 *
 * @param {String} url
 * @param {Mixed} [data]
 * @param {Function} [fn]
 * @return {Request}
 * @api public
 */

function del(url, data, fn) {
  var req = request('DELETE', url);
  if ('function' == typeof data) (fn = data), (data = null);
  if (data) req.send(data);
  if (fn) req.end(fn);
  return req;
}

request['del'] = del;
request['delete'] = del;

/**
 * PATCH `url` with optional `data` and callback `fn(res)`.
 *
 * @param {String} url
 * @param {Mixed} [data]
 * @param {Function} [fn]
 * @return {Request}
 * @api public
 */

request.patch = function(url, data, fn) {
  var req = request('PATCH', url);
  if ('function' == typeof data) (fn = data), (data = null);
  if (data) req.send(data);
  if (fn) req.end(fn);
  return req;
};

/**
 * POST `url` with optional `data` and callback `fn(res)`.
 *
 * @param {String} url
 * @param {Mixed} [data]
 * @param {Function} [fn]
 * @return {Request}
 * @api public
 */

request.post = function(url, data, fn) {
  var req = request('POST', url);
  if ('function' == typeof data) (fn = data), (data = null);
  if (data) req.send(data);
  if (fn) req.end(fn);
  return req;
};

/**
 * PUT `url` with optional `data` and callback `fn(res)`.
 *
 * @param {String} url
 * @param {Mixed|Function} [data] or fn
 * @param {Function} [fn]
 * @return {Request}
 * @api public
 */

request.put = function(url, data, fn) {
  var req = request('PUT', url);
  if ('function' == typeof data) (fn = data), (data = null);
  if (data) req.send(data);
  if (fn) req.end(fn);
  return req;
};

},{"./agent-base":99,"./is-object":101,"./request-base":102,"./response-base":103,"component-emitter":6}],101:[function(require,module,exports){
'use strict';

/**
 * Check if `obj` is an object.
 *
 * @param {Object} obj
 * @return {Boolean}
 * @api private
 */

function isObject(obj) {
  return null !== obj && 'object' === typeof obj;
}

module.exports = isObject;

},{}],102:[function(require,module,exports){
'use strict';

/**
 * Module of mixed-in functions shared between node and client code
 */
var isObject = require('./is-object');

/**
 * Expose `RequestBase`.
 */

module.exports = RequestBase;

/**
 * Initialize a new `RequestBase`.
 *
 * @api public
 */

function RequestBase(obj) {
  if (obj) return mixin(obj);
}

/**
 * Mixin the prototype properties.
 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */

function mixin(obj) {
  for (var key in RequestBase.prototype) {
    obj[key] = RequestBase.prototype[key];
  }
  return obj;
}

/**
 * Clear previous timeout.
 *
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.clearTimeout = function _clearTimeout(){
  clearTimeout(this._timer);
  clearTimeout(this._responseTimeoutTimer);
  delete this._timer;
  delete this._responseTimeoutTimer;
  return this;
};

/**
 * Override default response body parser
 *
 * This function will be called to convert incoming data into request.body
 *
 * @param {Function}
 * @api public
 */

RequestBase.prototype.parse = function parse(fn){
  this._parser = fn;
  return this;
};

/**
 * Set format of binary response body.
 * In browser valid formats are 'blob' and 'arraybuffer',
 * which return Blob and ArrayBuffer, respectively.
 *
 * In Node all values result in Buffer.
 *
 * Examples:
 *
 *      req.get('/')
 *        .responseType('blob')
 *        .end(callback);
 *
 * @param {String} val
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.responseType = function(val){
  this._responseType = val;
  return this;
};

/**
 * Override default request body serializer
 *
 * This function will be called to convert data set via .send or .attach into payload to send
 *
 * @param {Function}
 * @api public
 */

RequestBase.prototype.serialize = function serialize(fn){
  this._serializer = fn;
  return this;
};

/**
 * Set timeouts.
 *
 * - response timeout is time between sending request and receiving the first byte of the response. Includes DNS and connection time.
 * - deadline is the time from start of the request to receiving response body in full. If the deadline is too short large files may not load at all on slow connections.
 *
 * Value of 0 or false means no timeout.
 *
 * @param {Number|Object} ms or {response, deadline}
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.timeout = function timeout(options){
  if (!options || 'object' !== typeof options) {
    this._timeout = options;
    this._responseTimeout = 0;
    return this;
  }

  for(var option in options) {
    switch(option) {
      case 'deadline':
        this._timeout = options.deadline;
        break;
      case 'response':
        this._responseTimeout = options.response;
        break;
      default:
        console.warn("Unknown timeout option", option);
    }
  }
  return this;
};

/**
 * Set number of retry attempts on error.
 *
 * Failed requests will be retried 'count' times if timeout or err.code >= 500.
 *
 * @param {Number} count
 * @param {Function} [fn]
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.retry = function retry(count, fn){
  // Default to 1 if no count passed or true
  if (arguments.length === 0 || count === true) count = 1;
  if (count <= 0) count = 0;
  this._maxRetries = count;
  this._retries = 0;
  this._retryCallback = fn;
  return this;
};

var ERROR_CODES = [
  'ECONNRESET',
  'ETIMEDOUT',
  'EADDRINFO',
  'ESOCKETTIMEDOUT'
];

/**
 * Determine if a request should be retried.
 * (Borrowed from segmentio/superagent-retry)
 *
 * @param {Error} err
 * @param {Response} [res]
 * @returns {Boolean}
 */
RequestBase.prototype._shouldRetry = function(err, res) {
  if (!this._maxRetries || this._retries++ >= this._maxRetries) {
    return false;
  }
  if (this._retryCallback) {
    try {
      var override = this._retryCallback(err, res);
      if (override === true) return true;
      if (override === false) return false;
      // undefined falls back to defaults
    } catch(e) {
      console.error(e);
    }
  }
  if (res && res.status && res.status >= 500 && res.status != 501) return true;
  if (err) {
    if (err.code && ~ERROR_CODES.indexOf(err.code)) return true;
    // Superagent timeout
    if (err.timeout && err.code == 'ECONNABORTED') return true;
    if (err.crossDomain) return true;
  }
  return false;
};

/**
 * Retry request
 *
 * @return {Request} for chaining
 * @api private
 */

RequestBase.prototype._retry = function() {

  this.clearTimeout();

  // node
  if (this.req) {
    this.req = null;
    this.req = this.request();
  }

  this._aborted = false;
  this.timedout = false;

  return this._end();
};

/**
 * Promise support
 *
 * @param {Function} resolve
 * @param {Function} [reject]
 * @return {Request}
 */

RequestBase.prototype.then = function then(resolve, reject) {
  if (!this._fullfilledPromise) {
    var self = this;
    if (this._endCalled) {
      console.warn("Warning: superagent request was sent twice, because both .end() and .then() were called. Never call .end() if you use promises");
    }
    this._fullfilledPromise = new Promise(function(innerResolve, innerReject) {
      self.end(function(err, res) {
        if (err) innerReject(err);
        else innerResolve(res);
      });
    });
  }
  return this._fullfilledPromise.then(resolve, reject);
};

RequestBase.prototype.catch = function(cb) {
  return this.then(undefined, cb);
};

/**
 * Allow for extension
 */

RequestBase.prototype.use = function use(fn) {
  fn(this);
  return this;
};

RequestBase.prototype.ok = function(cb) {
  if ('function' !== typeof cb) throw Error("Callback required");
  this._okCallback = cb;
  return this;
};

RequestBase.prototype._isResponseOK = function(res) {
  if (!res) {
    return false;
  }

  if (this._okCallback) {
    return this._okCallback(res);
  }

  return res.status >= 200 && res.status < 300;
};

/**
 * Get request header `field`.
 * Case-insensitive.
 *
 * @param {String} field
 * @return {String}
 * @api public
 */

RequestBase.prototype.get = function(field){
  return this._header[field.toLowerCase()];
};

/**
 * Get case-insensitive header `field` value.
 * This is a deprecated internal API. Use `.get(field)` instead.
 *
 * (getHeader is no longer used internally by the superagent code base)
 *
 * @param {String} field
 * @return {String}
 * @api private
 * @deprecated
 */

RequestBase.prototype.getHeader = RequestBase.prototype.get;

/**
 * Set header `field` to `val`, or multiple fields with one object.
 * Case-insensitive.
 *
 * Examples:
 *
 *      req.get('/')
 *        .set('Accept', 'application/json')
 *        .set('X-API-Key', 'foobar')
 *        .end(callback);
 *
 *      req.get('/')
 *        .set({ Accept: 'application/json', 'X-API-Key': 'foobar' })
 *        .end(callback);
 *
 * @param {String|Object} field
 * @param {String} val
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.set = function(field, val){
  if (isObject(field)) {
    for (var key in field) {
      this.set(key, field[key]);
    }
    return this;
  }
  this._header[field.toLowerCase()] = val;
  this.header[field] = val;
  return this;
};

/**
 * Remove header `field`.
 * Case-insensitive.
 *
 * Example:
 *
 *      req.get('/')
 *        .unset('User-Agent')
 *        .end(callback);
 *
 * @param {String} field
 */
RequestBase.prototype.unset = function(field){
  delete this._header[field.toLowerCase()];
  delete this.header[field];
  return this;
};

/**
 * Write the field `name` and `val`, or multiple fields with one object
 * for "multipart/form-data" request bodies.
 *
 * ``` js
 * request.post('/upload')
 *   .field('foo', 'bar')
 *   .end(callback);
 *
 * request.post('/upload')
 *   .field({ foo: 'bar', baz: 'qux' })
 *   .end(callback);
 * ```
 *
 * @param {String|Object} name
 * @param {String|Blob|File|Buffer|fs.ReadStream} val
 * @return {Request} for chaining
 * @api public
 */
RequestBase.prototype.field = function(name, val) {
  // name should be either a string or an object.
  if (null === name || undefined === name) {
    throw new Error('.field(name, val) name can not be empty');
  }

  if (this._data) {
    console.error(".field() can't be used if .send() is used. Please use only .send() or only .field() & .attach()");
  }

  if (isObject(name)) {
    for (var key in name) {
      this.field(key, name[key]);
    }
    return this;
  }

  if (Array.isArray(val)) {
    for (var i in val) {
      this.field(name, val[i]);
    }
    return this;
  }

  // val should be defined now
  if (null === val || undefined === val) {
    throw new Error('.field(name, val) val can not be empty');
  }
  if ('boolean' === typeof val) {
    val = '' + val;
  }
  this._getFormData().append(name, val);
  return this;
};

/**
 * Abort the request, and clear potential timeout.
 *
 * @return {Request}
 * @api public
 */
RequestBase.prototype.abort = function(){
  if (this._aborted) {
    return this;
  }
  this._aborted = true;
  this.xhr && this.xhr.abort(); // browser
  this.req && this.req.abort(); // node
  this.clearTimeout();
  this.emit('abort');
  return this;
};

RequestBase.prototype._auth = function(user, pass, options, base64Encoder) {
  switch (options.type) {
    case 'basic':
      this.set('Authorization', 'Basic ' + base64Encoder(user + ':' + pass));
      break;

    case 'auto':
      this.username = user;
      this.password = pass;
      break;

    case 'bearer': // usage would be .auth(accessToken, { type: 'bearer' })
      this.set('Authorization', 'Bearer ' + user);
      break;
  }
  return this;
};

/**
 * Enable transmission of cookies with x-domain requests.
 *
 * Note that for this to work the origin must not be
 * using "Access-Control-Allow-Origin" with a wildcard,
 * and also must set "Access-Control-Allow-Credentials"
 * to "true".
 *
 * @api public
 */

RequestBase.prototype.withCredentials = function(on) {
  // This is browser-only functionality. Node side is no-op.
  if (on == undefined) on = true;
  this._withCredentials = on;
  return this;
};

/**
 * Set the max redirects to `n`. Does noting in browser XHR implementation.
 *
 * @param {Number} n
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.redirects = function(n){
  this._maxRedirects = n;
  return this;
};

/**
 * Maximum size of buffered response body, in bytes. Counts uncompressed size.
 * Default 200MB.
 *
 * @param {Number} n
 * @return {Request} for chaining
 */
RequestBase.prototype.maxResponseSize = function(n){
  if ('number' !== typeof n) {
    throw TypeError("Invalid argument");
  }
  this._maxResponseSize = n;
  return this;
};

/**
 * Convert to a plain javascript object (not JSON string) of scalar properties.
 * Note as this method is designed to return a useful non-this value,
 * it cannot be chained.
 *
 * @return {Object} describing method, url, and data of this request
 * @api public
 */

RequestBase.prototype.toJSON = function() {
  return {
    method: this.method,
    url: this.url,
    data: this._data,
    headers: this._header,
  };
};

/**
 * Send `data` as the request body, defaulting the `.type()` to "json" when
 * an object is given.
 *
 * Examples:
 *
 *       // manual json
 *       request.post('/user')
 *         .type('json')
 *         .send('{"name":"tj"}')
 *         .end(callback)
 *
 *       // auto json
 *       request.post('/user')
 *         .send({ name: 'tj' })
 *         .end(callback)
 *
 *       // manual x-www-form-urlencoded
 *       request.post('/user')
 *         .type('form')
 *         .send('name=tj')
 *         .end(callback)
 *
 *       // auto x-www-form-urlencoded
 *       request.post('/user')
 *         .type('form')
 *         .send({ name: 'tj' })
 *         .end(callback)
 *
 *       // defaults to x-www-form-urlencoded
 *      request.post('/user')
 *        .send('name=tobi')
 *        .send('species=ferret')
 *        .end(callback)
 *
 * @param {String|Object} data
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.send = function(data){
  var isObj = isObject(data);
  var type = this._header['content-type'];

  if (this._formData) {
    console.error(".send() can't be used if .attach() or .field() is used. Please use only .send() or only .field() & .attach()");
  }

  if (isObj && !this._data) {
    if (Array.isArray(data)) {
      this._data = [];
    } else if (!this._isHost(data)) {
      this._data = {};
    }
  } else if (data && this._data && this._isHost(this._data)) {
    throw Error("Can't merge these send calls");
  }

  // merge
  if (isObj && isObject(this._data)) {
    for (var key in data) {
      this._data[key] = data[key];
    }
  } else if ('string' == typeof data) {
    // default to x-www-form-urlencoded
    if (!type) this.type('form');
    type = this._header['content-type'];
    if ('application/x-www-form-urlencoded' == type) {
      this._data = this._data
        ? this._data + '&' + data
        : data;
    } else {
      this._data = (this._data || '') + data;
    }
  } else {
    this._data = data;
  }

  if (!isObj || this._isHost(data)) {
    return this;
  }

  // default to json
  if (!type) this.type('json');
  return this;
};

/**
 * Sort `querystring` by the sort function
 *
 *
 * Examples:
 *
 *       // default order
 *       request.get('/user')
 *         .query('name=Nick')
 *         .query('search=Manny')
 *         .sortQuery()
 *         .end(callback)
 *
 *       // customized sort function
 *       request.get('/user')
 *         .query('name=Nick')
 *         .query('search=Manny')
 *         .sortQuery(function(a, b){
 *           return a.length - b.length;
 *         })
 *         .end(callback)
 *
 *
 * @param {Function} sort
 * @return {Request} for chaining
 * @api public
 */

RequestBase.prototype.sortQuery = function(sort) {
  // _sort default to true but otherwise can be a function or boolean
  this._sort = typeof sort === 'undefined' ? true : sort;
  return this;
};

/**
 * Compose querystring to append to req.url
 *
 * @api private
 */
RequestBase.prototype._finalizeQueryString = function(){
  var query = this._query.join('&');
  if (query) {
    this.url += (this.url.indexOf('?') >= 0 ? '&' : '?') + query;
  }
  this._query.length = 0; // Makes the call idempotent

  if (this._sort) {
    var index = this.url.indexOf('?');
    if (index >= 0) {
      var queryArr = this.url.substring(index + 1).split('&');
      if ('function' === typeof this._sort) {
        queryArr.sort(this._sort);
      } else {
        queryArr.sort();
      }
      this.url = this.url.substring(0, index) + '?' + queryArr.join('&');
    }
  }
};

// For backwards compat only
RequestBase.prototype._appendQueryString = function() {console.trace("Unsupported");}

/**
 * Invoke callback with timeout error.
 *
 * @api private
 */

RequestBase.prototype._timeoutError = function(reason, timeout, errno){
  if (this._aborted) {
    return;
  }
  var err = new Error(reason + timeout + 'ms exceeded');
  err.timeout = timeout;
  err.code = 'ECONNABORTED';
  err.errno = errno;
  this.timedout = true;
  this.abort();
  this.callback(err);
};

RequestBase.prototype._setTimeouts = function() {
  var self = this;

  // deadline
  if (this._timeout && !this._timer) {
    this._timer = setTimeout(function(){
      self._timeoutError('Timeout of ', self._timeout, 'ETIME');
    }, this._timeout);
  }
  // response timeout
  if (this._responseTimeout && !this._responseTimeoutTimer) {
    this._responseTimeoutTimer = setTimeout(function(){
      self._timeoutError('Response timeout of ', self._responseTimeout, 'ETIMEDOUT');
    }, this._responseTimeout);
  }
};

},{"./is-object":101}],103:[function(require,module,exports){
'use strict';

/**
 * Module dependencies.
 */

var utils = require('./utils');

/**
 * Expose `ResponseBase`.
 */

module.exports = ResponseBase;

/**
 * Initialize a new `ResponseBase`.
 *
 * @api public
 */

function ResponseBase(obj) {
  if (obj) return mixin(obj);
}

/**
 * Mixin the prototype properties.
 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */

function mixin(obj) {
  for (var key in ResponseBase.prototype) {
    obj[key] = ResponseBase.prototype[key];
  }
  return obj;
}

/**
 * Get case-insensitive `field` value.
 *
 * @param {String} field
 * @return {String}
 * @api public
 */

ResponseBase.prototype.get = function(field) {
  return this.header[field.toLowerCase()];
};

/**
 * Set header related properties:
 *
 *   - `.type` the content type without params
 *
 * A response of "Content-Type: text/plain; charset=utf-8"
 * will provide you with a `.type` of "text/plain".
 *
 * @param {Object} header
 * @api private
 */

ResponseBase.prototype._setHeaderProperties = function(header){
    // TODO: moar!
    // TODO: make this a util

    // content-type
    var ct = header['content-type'] || '';
    this.type = utils.type(ct);

    // params
    var params = utils.params(ct);
    for (var key in params) this[key] = params[key];

    this.links = {};

    // links
    try {
        if (header.link) {
            this.links = utils.parseLinks(header.link);
        }
    } catch (err) {
        // ignore
    }
};

/**
 * Set flags such as `.ok` based on `status`.
 *
 * For example a 2xx response will give you a `.ok` of __true__
 * whereas 5xx will be __false__ and `.error` will be __true__. The
 * `.clientError` and `.serverError` are also available to be more
 * specific, and `.statusType` is the class of error ranging from 1..5
 * sometimes useful for mapping respond colors etc.
 *
 * "sugar" properties are also defined for common cases. Currently providing:
 *
 *   - .noContent
 *   - .badRequest
 *   - .unauthorized
 *   - .notAcceptable
 *   - .notFound
 *
 * @param {Number} status
 * @api private
 */

ResponseBase.prototype._setStatusProperties = function(status){
    var type = status / 100 | 0;

    // status / class
    this.status = this.statusCode = status;
    this.statusType = type;

    // basics
    this.info = 1 == type;
    this.ok = 2 == type;
    this.redirect = 3 == type;
    this.clientError = 4 == type;
    this.serverError = 5 == type;
    this.error = (4 == type || 5 == type)
        ? this.toError()
        : false;

    // sugar
    this.accepted = 202 == status;
    this.noContent = 204 == status;
    this.badRequest = 400 == status;
    this.unauthorized = 401 == status;
    this.notAcceptable = 406 == status;
    this.forbidden = 403 == status;
    this.notFound = 404 == status;
};

},{"./utils":104}],104:[function(require,module,exports){
'use strict';

/**
 * Return the mime type for the given `str`.
 *
 * @param {String} str
 * @return {String}
 * @api private
 */

exports.type = function(str){
  return str.split(/ *; */).shift();
};

/**
 * Return header field parameters.
 *
 * @param {String} str
 * @return {Object}
 * @api private
 */

exports.params = function(str){
  return str.split(/ *; */).reduce(function(obj, str){
    var parts = str.split(/ *= */);
    var key = parts.shift();
    var val = parts.shift();

    if (key && val) obj[key] = val;
    return obj;
  }, {});
};

/**
 * Parse Link header fields.
 *
 * @param {String} str
 * @return {Object}
 * @api private
 */

exports.parseLinks = function(str){
  return str.split(/ *, */).reduce(function(obj, str){
    var parts = str.split(/ *; */);
    var url = parts[0].slice(1, -1);
    var rel = parts[1].split(/ *= */)[1].slice(1, -1);
    obj[rel] = url;
    return obj;
  }, {});
};

/**
 * Strip content related fields from `header`.
 *
 * @param {Object} header
 * @return {Object} header
 * @api private
 */

exports.cleanHeader = function(header, changesOrigin){
  delete header['content-type'];
  delete header['content-length'];
  delete header['transfer-encoding'];
  delete header['host'];
  // secuirty
  if (changesOrigin) {
    delete header['authorization'];
    delete header['cookie'];
  }
  return header;
};

},{}],105:[function(require,module,exports){
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Apigee Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

var urlParse = require('url').parse;
var clone = require('lodash.clonedeep');

var primitiveTypes = [
  'string',
  'number',
  'boolean',
  'integer',
  'array',
  'void',
  'File'
];

if (typeof window === 'undefined') {
  module.exports = convert;
} else {
  window.SwaggerConverter = window.SwaggerConverter || {
    convert: convert
  };
}

/*
 * Converts Swagger 1.2 specs file to Swagger 2.0 specs.
 * @param resourceListing {object} - root Swagger 1.2 document where it has a
 *  list of all paths
 * @param apiDeclarations {array} - a list of all resources listed in
 * resourceListing. Array of objects
 * @returns {object} - Fully converted Swagger 2.0 document
*/
function convert(resourceListing, apiDeclarations) {
  if (typeof resourceListing !== 'object') {
    throw new Error('resourceListing must be an object');
  }
  if (!Array.isArray(apiDeclarations)) {
    apiDeclarations = [];
  }

  var convertedSecurityNames = {};
  var models = {};
  var result = {
    swagger: '2.0',
    info: buildInfo(resourceListing),
    paths: {}
  };

  if (resourceListing.authorizations) {
    result.securityDefinitions = buildSecurityDefinitions(resourceListing,
      convertedSecurityNames);
  }

  if (resourceListing.basePath) {
    assignPathComponents(resourceListing.basePath, result);
  }

  extend(models, resourceListing.models);

  // Handle embedded documents
  if (Array.isArray(resourceListing.apis)) {
    if (apiDeclarations.length > 0) {
      result.tags = [];
    }
    resourceListing.apis.forEach(function(api) {
      if (result.tags) {
        result.tags.push({
          'name': api.path.replace('.{format}', '').substring(1),
          'description': api.description});
      }
      if (Array.isArray(api.operations)) {
        result.paths[api.path] = buildPath(api, resourceListing);
      }
    });
  }

  apiDeclarations.forEach(function(apiDeclaration) {

    // For each apiDeclaration if there is a basePath, assign path components
    // This might override previous assignments
    if (apiDeclaration.basePath) {
      assignPathComponents(apiDeclaration.basePath, result);
    }

    if (!Array.isArray(apiDeclaration.apis)) { return; }
    apiDeclaration.apis.forEach(function(api) {
      result.paths[api.path] = buildPath(api, apiDeclaration);

    });
    if (apiDeclaration.models && Object.keys(apiDeclaration.models).length) {
      extend(models, transformAllModels(apiDeclaration.models));
    }
  });

  if (Object.keys(models).length) {
    result.definitions = transformAllModels(models);
  }

  return result;
}

/*
 * Builds "info" section of Swagger 2.0 document
 * @param source {object} - Swagger 1.2 document object
 * @returns {object} - "info" section of Swagger 2.0 document
*/
function buildInfo(source) {
  var info = {
    version: source.apiVersion,
    title: 'Title was not specified'
  };

  if (typeof source.info === 'object') {

    if (source.info.title) {
      info.title = source.info.title;
    }

    if (source.info.description) {
      info.description = source.info.description;
    }

    if (source.info.contact) {
      info.contact = {
        email: source.info.contact
      };
    }

    if (source.info.license) {
      info.license = {
        name: source.info.license,
        url: source.info.licenseUrl
      };
    }

    if (source.info.termsOfServiceUrl) {
      info.termsOfService = source.info.termsOfServiceUrl;
    }
  }

  return info;
}

/*
 * Assigns host, basePath and schemes for Swagger 2.0 result document from
 * Swagger 1.2 basePath.
 * @param basePath {string} - the base path from Swagger 1.2
 * @param result {object} - Swagger 2.0 document
*/
function assignPathComponents(basePath, result) {
  var url = urlParse(basePath);
  result.host = url.host;
  result.basePath = url.path;
  if (url.protocol) {
    result.schemes = [url.protocol.substr(0, url.protocol.length - 1)];
  }
}

/*
 * Process a data type object.
 *
 * @see {@link https://github.com/swagger-api/swagger-spec/blob/master/versions/
 *  1.2.md#433-data-type-fields}
 *
 * @param field {object} - A data type field
 *
 * @returns {object} - Swagger 2.0 equivalent
 */
function processDataType(field, fixRef) {
  field = clone(field);

  // Checking for the existence of '#/definitions/' is related to this bug:
  //   https://github.com/apigee-127/swagger-converter/issues/6
  if (field.$ref && field.$ref.indexOf('#/definitions/') === -1) {
    field.$ref = '#/definitions/' + field.$ref;
  } else if (field.items && field.items.$ref &&
             field.items.$ref.indexOf('#/definitions/') === -1) {
    field.items.$ref = '#/definitions/' + field.items.$ref;
  }

  if (fixRef) {
    if (field.type && primitiveTypes.indexOf(field.type) === -1) {
      field = {$ref: '#/definitions/' + field.type};
    }
  }

  if (field.minimum) {
    field.minimum = fixNonStringValue(field.minimum);
  }

  if (field.maximum) {
    field.maximum = fixNonStringValue(field.maximum);
  }

  if (field.defaultValue) {
    field.default = field.defaultValue;
    delete field.defaultValue;
    if (field.type && field.type !== 'string') {
      field.default = fixNonStringValue(field.default);
    }
  }

  return field;
}

/*
 * Builds a Swagger 2.0 path object form a Swagger 1.2 path object
 * @param api {object} - Swagger 1.2 path object
 * @param apiDeclaration {object} - parent apiDeclaration
 * @returns {object} - Swagger 2.0 path object
*/
function buildPath(api, apiDeclaration) {
  var path = {};

  api.operations.forEach(function(oldOperation) {
    var method = oldOperation.method.toLowerCase();
    path[method] = buildOperation(oldOperation, apiDeclaration.produces,
      apiDeclaration.consumes, apiDeclaration.resourcePath);
  });

  return path;
}

/*
 * Builds a Swagger 2.0 operation object form a Swagger 1.2 operation object
 * @param oldOperation {object} - Swagger 1.2 operation object
 * @param produces {array} - from containing apiDeclaration
 * @param consumes {array} - from containing apiDeclaration
 * @returns {object} - Swagger 2.0 operation object
*/
function buildOperation(oldOperation, produces, consumes, resourcePath) {
  var operation = {
    responses: {},
    description: oldOperation.description || ''
  };

  if (resourcePath) {
    operation.tags = [];
    operation.tags.push(resourcePath.substr(1));
  }

  if (oldOperation.summary) {
    operation.summary = oldOperation.summary;
  }

  if (oldOperation.nickname) {
    operation.operationId = oldOperation.nickname;
  }

  if (produces) { operation.produces = produces; }
  if (consumes) { operation.consumes = consumes; }

  if (Array.isArray(oldOperation.parameters) &&
      oldOperation.parameters.length) {
    operation.parameters = oldOperation.parameters.map(function(parameter) {
      return buildParameter(parameter);
    });
  }

  if (Array.isArray(oldOperation.responseMessages)) {
    oldOperation.responseMessages.forEach(function(oldResponse) {
      operation.responses[oldResponse.code] = buildResponse(oldResponse);
    });
  }

  if (!Object.keys(operation.responses).length ||
    (!operation.responses[200] && oldOperation.type)) {
    operation.responses[200] = {
      description: 'No response was specified'
    };
  }

  if (oldOperation.type && oldOperation.type !== 'void') {
    var schema = buildParamType(oldOperation);
    if (primitiveTypes.indexOf(oldOperation.type) === -1) {
      schema = {
        '$ref': '#/definitions/' + oldOperation.type
      };
    }
    operation.responses['200'].schema = schema;
  }

  return operation;
}

/*
 * Builds a Swagger 2.0 response object form a Swagger 1.2 response object
 * @param oldResponse {object} - Swagger 1.2 response object
 * @returns {object} - Swagger 2.0 response object
*/
function buildResponse(oldResponse) {
  var response = {};

  // TODO: Confirm this is correct
  response.description = oldResponse.message;

  return response;
}

/*
 * Converts Swagger 1.2 parameter object to Swagger 2.0 parameter object
 * @param oldParameter {object} - Swagger 1.2 parameter object
 * @returns {object} - Swagger 2.0 parameter object
*/
function buildParameter(oldParameter) {
  var parameter = {
    in: oldParameter.paramType,
    description: oldParameter.description,
    name: oldParameter.name,
    required: !!oldParameter.required
  };

  if (primitiveTypes.indexOf(oldParameter.type) === -1) {
    parameter.schema = {$ref: '#/definitions/' + oldParameter.type};
  } else if (oldParameter.paramType === 'body') {
    parameter.schema = buildParamType(oldParameter);
  } else {
    extend(parameter, buildParamType(oldParameter));
  }

  // form was changed to formData in Swagger 2.0
  if (parameter.in === 'form') {
    parameter.in = 'formData';
  }

  return parameter;
}

/*
 * Converts Swagger 1.2 type fields from parameter object into their Swagger 2.0 conterparts
 * @param oldParameter {object} - Swagger 1.2 parameter object
 * @returns {object} - Swagger 2.0 type fields from parameter object
*/
function buildParamType(oldParameter) {
  var paramType = {};
  var copyProperties = [
    'default',
    'maximum',
    'minimum',
    'items'
  ];

  oldParameter = processDataType(oldParameter, false);

  paramType.type = oldParameter.type.toLowerCase();

  copyProperties.forEach(function(name) {
    if (typeof oldParameter[name] !== 'undefined') {
      paramType[name] = oldParameter[name];
    }
  });

  if (typeof oldParameter.defaultValue !== 'undefined') {
    paramType.default = oldParameter.defaultValue;
  }

  return paramType;
}

/*
 * Convertes Swagger 1.2 authorization definitions to Swagger 2.0 security
 *   definitions
 *
 * @param resourceListing {object} - The Swagger 1.2 Resource Listing document
 * @param convertedSecurityNames {object} - A list of original Swagger 1.2
 * authorization names and the new Swagger 2.0
 *  security names associated with it (This is required because Swagger 2.0 only
 *  supports one oauth2 flow per security definition but in Swagger 1.2 you
 *  could describe two (implicit and authorization_code).  To support this, we
 *  will create a per-flow version of each oauth2 definition, where necessary,
 *  and keep track of the new names so that when we handle security references
 *  we reference things properly.)
 *
 * @returns {object} - Swagger 2.0 security definitions
 */
function buildSecurityDefinitions(resourceListing, convertedSecurityNames) {
  var securityDefinitions = {};

  Object.keys(resourceListing.authorizations).forEach(function(name) {
    var authorization = resourceListing.authorizations[name];
    var createDefinition = function createDefinition(oName) {
      var securityDefinition = securityDefinitions[oName || name] = {
        type: authorization.type
      };

      if (authorization.passAs) {
        securityDefinition.in = authorization.passAs;
      }

      if (authorization.keyname) {
        securityDefinition.name = authorization.keyname;
      }

      return securityDefinition;
    };

    // For oauth2 types, 1.2 describes multiple "flows" in one auth and for 2.0,
    // that is not an option so we need to
    // create one security definition per flow and keep track of this mapping.
    if (authorization.grantTypes) {
      convertedSecurityNames[name] = [];

      Object.keys(authorization.grantTypes).forEach(function(gtName) {
        var grantType = authorization.grantTypes[gtName];
        var oName = name + '_' + gtName;
        var securityDefinition = createDefinition(oName);

        convertedSecurityNames[name].push(oName);

        if (gtName === 'implicit') {
          securityDefinition.flow = 'implicit';
        } else {
          securityDefinition.flow = 'accessCode';
        }

        switch (gtName) {
        case 'implicit':
          securityDefinition.authorizationUrl = grantType.loginEndpoint.url;
          break;

        case 'authorization_code':
          securityDefinition.authorizationUrl =
            grantType.tokenRequestEndpoint.url;
          securityDefinition.tokenUrl = grantType.tokenEndpoint.url;
          break;
        }

        if (authorization.scopes) {
          securityDefinition.scopes = {};

          authorization.scopes.forEach(function(scope) {
            securityDefinition.scopes[scope.scope] = scope.description ||
              ('Undescribed ' + scope.scope);
          });
        }
      });
    } else {
      createDefinition();
    }
  });

  return securityDefinitions;
}

/*
 * Transforms a Swagger 1.2 model object to a Swagger 2.0 model object
 * @param model {object} - (mutable) Swagger 1.2 model object
*/
function transformModel(model) {
  if (typeof model.properties === 'object') {
    Object.keys(model.properties).forEach(function(propertieName) {
      model.properties[propertieName] =
        processDataType(model.properties[propertieName], true);
    });
  }
}

/*
 * Transfers the "models" object of Swagger 1.2 specs to Swagger 2.0 definitions
 * object
 * @param models {object} - (mutable) an object containing Swagger 1.2 objects
 * @returns {object} - transformed modles object
*/
function transformAllModels(models) {
  var modelsClone = clone(models);

  if (typeof models !== 'object') {
    throw new Error('models must be object');
  }

  var hierarchy = {};

  Object.keys(modelsClone).forEach(function(modelId) {
    var model = modelsClone[modelId];
    delete model['id'];

    transformModel(model);

    if (model.subTypes) {
      hierarchy[modelId] = model.subTypes;

      delete model.subTypes;
    }
  });

  Object.keys(hierarchy).forEach(function(parent) {
    hierarchy[parent].forEach(function(childId) {
      var childModel = modelsClone[childId];

      if (childModel) {
        var allOf = (childModel.allOf || []).concat({
          $ref: '#/definitions/' + parent
        }).concat(clone(childModel));
        for (var member in childModel) {
          delete childModel[member];
        }
        childModel.allOf = allOf;
      }
    });
  });

  return modelsClone;
}

/*
 * Extends an object with another
 * @param source {object} - object that will get extended
 * @parma destination {object} - object the will used to extend source
*/
function extend(source, destination) {
  if (typeof source !== 'object') {
    throw new Error('source must be objects');
  }

  if (typeof destination === 'object') {
    Object.keys(destination).forEach(function(key) {
      source[key] = destination[key];
    });
  }
}

/*
 * Convert string values into the proper type.
 * @param value {*} - value to convert
 * @returns {*} - transformed modles object
*/
function fixNonStringValue(value) {
  if (typeof value !== 'string') {
    return value;
  }

  try {
    return JSON.parse(value);
  } catch (e) {
    throw Error('incorect property value: ' + e.message);
  }
}

},{"lodash.clonedeep":75,"url":108}],106:[function(require,module,exports){
var traverse = module.exports = function (obj) {
    return new Traverse(obj);
};

function Traverse (obj) {
    this.value = obj;
}

Traverse.prototype.get = function (ps) {
    var node = this.value;
    for (var i = 0; i < ps.length; i ++) {
        var key = ps[i];
        if (!node || !hasOwnProperty.call(node, key)) {
            node = undefined;
            break;
        }
        node = node[key];
    }
    return node;
};

Traverse.prototype.has = function (ps) {
    var node = this.value;
    for (var i = 0; i < ps.length; i ++) {
        var key = ps[i];
        if (!node || !hasOwnProperty.call(node, key)) {
            return false;
        }
        node = node[key];
    }
    return true;
};

Traverse.prototype.set = function (ps, value) {
    var node = this.value;
    for (var i = 0; i < ps.length - 1; i ++) {
        var key = ps[i];
        if (!hasOwnProperty.call(node, key)) node[key] = {};
        node = node[key];
    }
    node[ps[i]] = value;
    return value;
};

Traverse.prototype.map = function (cb) {
    return walk(this.value, cb, true);
};

Traverse.prototype.forEach = function (cb) {
    this.value = walk(this.value, cb, false);
    return this.value;
};

Traverse.prototype.reduce = function (cb, init) {
    var skip = arguments.length === 1;
    var acc = skip ? this.value : init;
    this.forEach(function (x) {
        if (!this.isRoot || !skip) {
            acc = cb.call(this, acc, x);
        }
    });
    return acc;
};

Traverse.prototype.paths = function () {
    var acc = [];
    this.forEach(function (x) {
        acc.push(this.path); 
    });
    return acc;
};

Traverse.prototype.nodes = function () {
    var acc = [];
    this.forEach(function (x) {
        acc.push(this.node);
    });
    return acc;
};

Traverse.prototype.clone = function () {
    var parents = [], nodes = [];
    
    return (function clone (src) {
        for (var i = 0; i < parents.length; i++) {
            if (parents[i] === src) {
                return nodes[i];
            }
        }
        
        if (typeof src === 'object' && src !== null) {
            var dst = copy(src);
            
            parents.push(src);
            nodes.push(dst);
            
            forEach(objectKeys(src), function (key) {
                dst[key] = clone(src[key]);
            });
            
            parents.pop();
            nodes.pop();
            return dst;
        }
        else {
            return src;
        }
    })(this.value);
};

function walk (root, cb, immutable) {
    var path = [];
    var parents = [];
    var alive = true;
    
    return (function walker (node_) {
        var node = immutable ? copy(node_) : node_;
        var modifiers = {};
        
        var keepGoing = true;
        
        var state = {
            node : node,
            node_ : node_,
            path : [].concat(path),
            parent : parents[parents.length - 1],
            parents : parents,
            key : path.slice(-1)[0],
            isRoot : path.length === 0,
            level : path.length,
            circular : null,
            update : function (x, stopHere) {
                if (!state.isRoot) {
                    state.parent.node[state.key] = x;
                }
                state.node = x;
                if (stopHere) keepGoing = false;
            },
            'delete' : function (stopHere) {
                delete state.parent.node[state.key];
                if (stopHere) keepGoing = false;
            },
            remove : function (stopHere) {
                if (isArray(state.parent.node)) {
                    state.parent.node.splice(state.key, 1);
                }
                else {
                    delete state.parent.node[state.key];
                }
                if (stopHere) keepGoing = false;
            },
            keys : null,
            before : function (f) { modifiers.before = f },
            after : function (f) { modifiers.after = f },
            pre : function (f) { modifiers.pre = f },
            post : function (f) { modifiers.post = f },
            stop : function () { alive = false },
            block : function () { keepGoing = false }
        };
        
        if (!alive) return state;
        
        function updateState() {
            if (typeof state.node === 'object' && state.node !== null) {
                if (!state.keys || state.node_ !== state.node) {
                    state.keys = objectKeys(state.node)
                }
                
                state.isLeaf = state.keys.length == 0;
                
                for (var i = 0; i < parents.length; i++) {
                    if (parents[i].node_ === node_) {
                        state.circular = parents[i];
                        break;
                    }
                }
            }
            else {
                state.isLeaf = true;
                state.keys = null;
            }
            
            state.notLeaf = !state.isLeaf;
            state.notRoot = !state.isRoot;
        }
        
        updateState();
        
        // use return values to update if defined
        var ret = cb.call(state, state.node);
        if (ret !== undefined && state.update) state.update(ret);
        
        if (modifiers.before) modifiers.before.call(state, state.node);
        
        if (!keepGoing) return state;
        
        if (typeof state.node == 'object'
        && state.node !== null && !state.circular) {
            parents.push(state);
            
            updateState();
            
            forEach(state.keys, function (key, i) {
                path.push(key);
                
                if (modifiers.pre) modifiers.pre.call(state, state.node[key], key);
                
                var child = walker(state.node[key]);
                if (immutable && hasOwnProperty.call(state.node, key)) {
                    state.node[key] = child.node;
                }
                
                child.isLast = i == state.keys.length - 1;
                child.isFirst = i == 0;
                
                if (modifiers.post) modifiers.post.call(state, child);
                
                path.pop();
            });
            parents.pop();
        }
        
        if (modifiers.after) modifiers.after.call(state, state.node);
        
        return state;
    })(root).node;
}

function copy (src) {
    if (typeof src === 'object' && src !== null) {
        var dst;
        
        if (isArray(src)) {
            dst = [];
        }
        else if (isDate(src)) {
            dst = new Date(src.getTime ? src.getTime() : src);
        }
        else if (isRegExp(src)) {
            dst = new RegExp(src);
        }
        else if (isError(src)) {
            dst = { message: src.message };
        }
        else if (isBoolean(src)) {
            dst = new Boolean(src);
        }
        else if (isNumber(src)) {
            dst = new Number(src);
        }
        else if (isString(src)) {
            dst = new String(src);
        }
        else if (Object.create && Object.getPrototypeOf) {
            dst = Object.create(Object.getPrototypeOf(src));
        }
        else if (src.constructor === Object) {
            dst = {};
        }
        else {
            var proto =
                (src.constructor && src.constructor.prototype)
                || src.__proto__
                || {}
            ;
            var T = function () {};
            T.prototype = proto;
            dst = new T;
        }
        
        forEach(objectKeys(src), function (key) {
            dst[key] = src[key];
        });
        return dst;
    }
    else return src;
}

var objectKeys = Object.keys || function keys (obj) {
    var res = [];
    for (var key in obj) res.push(key)
    return res;
};

function toS (obj) { return Object.prototype.toString.call(obj) }
function isDate (obj) { return toS(obj) === '[object Date]' }
function isRegExp (obj) { return toS(obj) === '[object RegExp]' }
function isError (obj) { return toS(obj) === '[object Error]' }
function isBoolean (obj) { return toS(obj) === '[object Boolean]' }
function isNumber (obj) { return toS(obj) === '[object Number]' }
function isString (obj) { return toS(obj) === '[object String]' }

var isArray = Array.isArray || function isArray (xs) {
    return Object.prototype.toString.call(xs) === '[object Array]';
};

var forEach = function (xs, fn) {
    if (xs.forEach) return xs.forEach(fn)
    else for (var i = 0; i < xs.length; i++) {
        fn(xs[i], i, xs);
    }
};

forEach(objectKeys(Traverse.prototype), function (key) {
    traverse[key] = function (obj) {
        var args = [].slice.call(arguments, 1);
        var t = new Traverse(obj);
        return t[key].apply(t, args);
    };
});

var hasOwnProperty = Object.hasOwnProperty || function (obj, key) {
    return key in obj;
};

},{}],107:[function(require,module,exports){
/** @license URI.js v3.0.1 (c) 2011 Gary Court. License: http://github.com/garycourt/uri-js */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
	typeof define === 'function' && define.amd ? define(['exports'], factory) :
	(factory((global.URI = global.URI || {})));
}(this, (function (exports) { 'use strict';

function merge() {
    for (var _len = arguments.length, sets = Array(_len), _key = 0; _key < _len; _key++) {
        sets[_key] = arguments[_key];
    }

    if (sets.length > 1) {
        sets[0] = sets[0].slice(0, -1);
        var xl = sets.length - 1;
        for (var x = 1; x < xl; ++x) {
            sets[x] = sets[x].slice(1, -1);
        }
        sets[xl] = sets[xl].slice(1);
        return sets.join('');
    } else {
        return sets[0];
    }
}
function subexp(str) {
    return "(?:" + str + ")";
}
function typeOf(o) {
    return o === undefined ? "undefined" : o === null ? "null" : Object.prototype.toString.call(o).split(" ").pop().split("]").shift().toLowerCase();
}
function toUpperCase(str) {
    return str.toUpperCase();
}
function toArray(obj) {
    return obj !== undefined && obj !== null ? obj instanceof Array ? obj : typeof obj.length !== "number" || obj.split || obj.setInterval || obj.call ? [obj] : Array.prototype.slice.call(obj) : [];
}

function buildExps(isIRI) {
    var ALPHA$$ = "[A-Za-z]",
        CR$ = "[\\x0D]",
        DIGIT$$ = "[0-9]",
        DQUOTE$$ = "[\\x22]",
        HEXDIG$$ = merge(DIGIT$$, "[A-Fa-f]"),
        //case-insensitive
    LF$$ = "[\\x0A]",
        SP$$ = "[\\x20]",
        PCT_ENCODED$ = subexp(subexp("%[EFef]" + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$) + "|" + subexp("%[89A-Fa-f]" + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$) + "|" + subexp("%" + HEXDIG$$ + HEXDIG$$)),
        //expanded
    GEN_DELIMS$$ = "[\\:\\/\\?\\#\\[\\]\\@]",
        SUB_DELIMS$$ = "[\\!\\$\\&\\'\\(\\)\\*\\+\\,\\;\\=]",
        RESERVED$$ = merge(GEN_DELIMS$$, SUB_DELIMS$$),
        UCSCHAR$$ = isIRI ? "[\\xA0-\\u200D\\u2010-\\u2029\\u202F-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF]" : "[]",
        //subset, excludes bidi control characters
    IPRIVATE$$ = isIRI ? "[\\uE000-\\uF8FF]" : "[]",
        //subset
    UNRESERVED$$ = merge(ALPHA$$, DIGIT$$, "[\\-\\.\\_\\~]", UCSCHAR$$),
        SCHEME$ = subexp(ALPHA$$ + merge(ALPHA$$, DIGIT$$, "[\\+\\-\\.]") + "*"),
        USERINFO$ = subexp(subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\:]")) + "*"),
        DEC_OCTET$ = subexp(subexp("25[0-5]") + "|" + subexp("2[0-4]" + DIGIT$$) + "|" + subexp("1" + DIGIT$$ + DIGIT$$) + "|" + subexp("[1-9]" + DIGIT$$) + "|" + DIGIT$$),
        IPV4ADDRESS$ = subexp(DEC_OCTET$ + "\\." + DEC_OCTET$ + "\\." + DEC_OCTET$ + "\\." + DEC_OCTET$),
        H16$ = subexp(HEXDIG$$ + "{1,4}"),
        LS32$ = subexp(subexp(H16$ + "\\:" + H16$) + "|" + IPV4ADDRESS$),
        IPV6ADDRESS1$ = subexp(subexp(H16$ + "\\:") + "{6}" + LS32$),
        //                           6( h16 ":" ) ls32
    IPV6ADDRESS2$ = subexp("\\:\\:" + subexp(H16$ + "\\:") + "{5}" + LS32$),
        //                      "::" 5( h16 ":" ) ls32
    IPV6ADDRESS3$ = subexp(subexp(H16$) + "?\\:\\:" + subexp(H16$ + "\\:") + "{4}" + LS32$),
        //[               h16 ] "::" 4( h16 ":" ) ls32
    IPV6ADDRESS4$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,1}" + H16$) + "?\\:\\:" + subexp(H16$ + "\\:") + "{3}" + LS32$),
        //[ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
    IPV6ADDRESS5$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,2}" + H16$) + "?\\:\\:" + subexp(H16$ + "\\:") + "{2}" + LS32$),
        //[ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
    IPV6ADDRESS6$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,3}" + H16$) + "?\\:\\:" + H16$ + "\\:" + LS32$),
        //[ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
    IPV6ADDRESS7$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,4}" + H16$) + "?\\:\\:" + LS32$),
        //[ *4( h16 ":" ) h16 ] "::"              ls32
    IPV6ADDRESS8$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,5}" + H16$) + "?\\:\\:" + H16$),
        //[ *5( h16 ":" ) h16 ] "::"              h16
    IPV6ADDRESS9$ = subexp(subexp(subexp(H16$ + "\\:") + "{0,6}" + H16$) + "?\\:\\:"),
        //[ *6( h16 ":" ) h16 ] "::"
    IPV6ADDRESS$ = subexp([IPV6ADDRESS1$, IPV6ADDRESS2$, IPV6ADDRESS3$, IPV6ADDRESS4$, IPV6ADDRESS5$, IPV6ADDRESS6$, IPV6ADDRESS7$, IPV6ADDRESS8$, IPV6ADDRESS9$].join("|")),
        IPVFUTURE$ = subexp("[vV]" + HEXDIG$$ + "+\\." + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\:]") + "+"),
        IP_LITERAL$ = subexp("\\[" + subexp(IPV6ADDRESS$ + "|" + IPVFUTURE$) + "\\]"),
        REG_NAME$ = subexp(subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$)) + "*"),
        HOST$ = subexp(IP_LITERAL$ + "|" + IPV4ADDRESS$ + "(?!" + REG_NAME$ + ")" + "|" + REG_NAME$),
        PORT$ = subexp(DIGIT$$ + "*"),
        AUTHORITY$ = subexp(subexp(USERINFO$ + "@") + "?" + HOST$ + subexp("\\:" + PORT$) + "?"),
        PCHAR$ = subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\:\\@]")),
        SEGMENT$ = subexp(PCHAR$ + "*"),
        SEGMENT_NZ$ = subexp(PCHAR$ + "+"),
        SEGMENT_NZ_NC$ = subexp(subexp(PCT_ENCODED$ + "|" + merge(UNRESERVED$$, SUB_DELIMS$$, "[\\@]")) + "+"),
        PATH_ABEMPTY$ = subexp(subexp("\\/" + SEGMENT$) + "*"),
        PATH_ABSOLUTE$ = subexp("\\/" + subexp(SEGMENT_NZ$ + PATH_ABEMPTY$) + "?"),
        //simplified
    PATH_NOSCHEME$ = subexp(SEGMENT_NZ_NC$ + PATH_ABEMPTY$),
        //simplified
    PATH_ROOTLESS$ = subexp(SEGMENT_NZ$ + PATH_ABEMPTY$),
        //simplified
    PATH_EMPTY$ = "(?!" + PCHAR$ + ")",
        PATH$ = subexp(PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_NOSCHEME$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$),
        QUERY$ = subexp(subexp(PCHAR$ + "|" + merge("[\\/\\?]", IPRIVATE$$)) + "*"),
        FRAGMENT$ = subexp(subexp(PCHAR$ + "|[\\/\\?]") + "*"),
        HIER_PART$ = subexp(subexp("\\/\\/" + AUTHORITY$ + PATH_ABEMPTY$) + "|" + PATH_ABSOLUTE$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$),
        URI$ = subexp(SCHEME$ + "\\:" + HIER_PART$ + subexp("\\?" + QUERY$) + "?" + subexp("\\#" + FRAGMENT$) + "?"),
        RELATIVE_PART$ = subexp(subexp("\\/\\/" + AUTHORITY$ + PATH_ABEMPTY$) + "|" + PATH_ABSOLUTE$ + "|" + PATH_NOSCHEME$ + "|" + PATH_EMPTY$),
        RELATIVE$ = subexp(RELATIVE_PART$ + subexp("\\?" + QUERY$) + "?" + subexp("\\#" + FRAGMENT$) + "?"),
        URI_REFERENCE$ = subexp(URI$ + "|" + RELATIVE$),
        ABSOLUTE_URI$ = subexp(SCHEME$ + "\\:" + HIER_PART$ + subexp("\\?" + QUERY$) + "?"),
        GENERIC_REF$ = "^(" + SCHEME$ + ")\\:" + subexp(subexp("\\/\\/(" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?)") + "?(" + PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$ + ")") + subexp("\\?(" + QUERY$ + ")") + "?" + subexp("\\#(" + FRAGMENT$ + ")") + "?$",
        RELATIVE_REF$ = "^(){0}" + subexp(subexp("\\/\\/(" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?)") + "?(" + PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_NOSCHEME$ + "|" + PATH_EMPTY$ + ")") + subexp("\\?(" + QUERY$ + ")") + "?" + subexp("\\#(" + FRAGMENT$ + ")") + "?$",
        ABSOLUTE_REF$ = "^(" + SCHEME$ + ")\\:" + subexp(subexp("\\/\\/(" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?)") + "?(" + PATH_ABEMPTY$ + "|" + PATH_ABSOLUTE$ + "|" + PATH_ROOTLESS$ + "|" + PATH_EMPTY$ + ")") + subexp("\\?(" + QUERY$ + ")") + "?$",
        SAMEDOC_REF$ = "^" + subexp("\\#(" + FRAGMENT$ + ")") + "?$",
        AUTHORITY_REF$ = "^" + subexp("(" + USERINFO$ + ")@") + "?(" + HOST$ + ")" + subexp("\\:(" + PORT$ + ")") + "?$";
    return {
        NOT_SCHEME: new RegExp(merge("[^]", ALPHA$$, DIGIT$$, "[\\+\\-\\.]"), "g"),
        NOT_USERINFO: new RegExp(merge("[^\\%\\:]", UNRESERVED$$, SUB_DELIMS$$), "g"),
        NOT_HOST: new RegExp(merge("[^\\%\\[\\]\\:]", UNRESERVED$$, SUB_DELIMS$$), "g"),
        NOT_PATH: new RegExp(merge("[^\\%\\/\\:\\@]", UNRESERVED$$, SUB_DELIMS$$), "g"),
        NOT_PATH_NOSCHEME: new RegExp(merge("[^\\%\\/\\@]", UNRESERVED$$, SUB_DELIMS$$), "g"),
        NOT_QUERY: new RegExp(merge("[^\\%]", UNRESERVED$$, SUB_DELIMS$$, "[\\:\\@\\/\\?]", IPRIVATE$$), "g"),
        NOT_FRAGMENT: new RegExp(merge("[^\\%]", UNRESERVED$$, SUB_DELIMS$$, "[\\:\\@\\/\\?]"), "g"),
        ESCAPE: new RegExp(merge("[^]", UNRESERVED$$, SUB_DELIMS$$), "g"),
        UNRESERVED: new RegExp(UNRESERVED$$, "g"),
        OTHER_CHARS: new RegExp(merge("[^\\%]", UNRESERVED$$, RESERVED$$), "g"),
        PCT_ENCODED: new RegExp(PCT_ENCODED$, "g"),
        IPV6ADDRESS: new RegExp("\\[?(" + IPV6ADDRESS$ + ")\\]?", "g")
    };
}
var URI_PROTOCOL = buildExps(false);

var IRI_PROTOCOL = buildExps(true);

var toConsumableArray = function (arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];

    return arr2;
  } else {
    return Array.from(arr);
  }
};

/** Highest positive signed 32-bit float value */

var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1

/** Bootstring parameters */
var base = 36;
var tMin = 1;
var tMax = 26;
var skew = 38;
var damp = 700;
var initialBias = 72;
var initialN = 128; // 0x80
var delimiter = '-'; // '\x2D'

/** Regular expressions */
var regexPunycode = /^xn--/;
var regexNonASCII = /[^\0-\x7E]/; // non-ASCII chars
var regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g; // RFC 3490 separators

/** Error messages */
var errors = {
	'overflow': 'Overflow: input needs wider integers to process',
	'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
	'invalid-input': 'Invalid input'
};

/** Convenience shortcuts */
var baseMinusTMin = base - tMin;
var floor = Math.floor;
var stringFromCharCode = String.fromCharCode;

/*--------------------------------------------------------------------------*/

/**
 * A generic error utility function.
 * @private
 * @param {String} type The error type.
 * @returns {Error} Throws a `RangeError` with the applicable error message.
 */
function error$1(type) {
	throw new RangeError(errors[type]);
}

/**
 * A generic `Array#map` utility function.
 * @private
 * @param {Array} array The array to iterate over.
 * @param {Function} callback The function that gets called for every array
 * item.
 * @returns {Array} A new array of values returned by the callback function.
 */
function map(array, fn) {
	var result = [];
	var length = array.length;
	while (length--) {
		result[length] = fn(array[length]);
	}
	return result;
}

/**
 * A simple `Array#map`-like wrapper to work with domain name strings or email
 * addresses.
 * @private
 * @param {String} domain The domain name or email address.
 * @param {Function} callback The function that gets called for every
 * character.
 * @returns {Array} A new string of characters returned by the callback
 * function.
 */
function mapDomain(string, fn) {
	var parts = string.split('@');
	var result = '';
	if (parts.length > 1) {
		// In email addresses, only the domain name should be punycoded. Leave
		// the local part (i.e. everything up to `@`) intact.
		result = parts[0] + '@';
		string = parts[1];
	}
	// Avoid `split(regex)` for IE8 compatibility. See #17.
	string = string.replace(regexSeparators, '\x2E');
	var labels = string.split('.');
	var encoded = map(labels, fn).join('.');
	return result + encoded;
}

/**
 * Creates an array containing the numeric code points of each Unicode
 * character in the string. While JavaScript uses UCS-2 internally,
 * this function will convert a pair of surrogate halves (each of which
 * UCS-2 exposes as separate characters) into a single code point,
 * matching UTF-16.
 * @see `punycode.ucs2.encode`
 * @see <https://mathiasbynens.be/notes/javascript-encoding>
 * @memberOf punycode.ucs2
 * @name decode
 * @param {String} string The Unicode input string (UCS-2).
 * @returns {Array} The new array of code points.
 */
function ucs2decode(string) {
	var output = [];
	var counter = 0;
	var length = string.length;
	while (counter < length) {
		var value = string.charCodeAt(counter++);
		if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
			// It's a high surrogate, and there is a next character.
			var extra = string.charCodeAt(counter++);
			if ((extra & 0xFC00) == 0xDC00) {
				// Low surrogate.
				output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
			} else {
				// It's an unmatched surrogate; only append this code unit, in case the
				// next code unit is the high surrogate of a surrogate pair.
				output.push(value);
				counter--;
			}
		} else {
			output.push(value);
		}
	}
	return output;
}

/**
 * Creates a string based on an array of numeric code points.
 * @see `punycode.ucs2.decode`
 * @memberOf punycode.ucs2
 * @name encode
 * @param {Array} codePoints The array of numeric code points.
 * @returns {String} The new Unicode string (UCS-2).
 */
var ucs2encode = function ucs2encode(array) {
	return String.fromCodePoint.apply(String, toConsumableArray(array));
};

/**
 * Converts a basic code point into a digit/integer.
 * @see `digitToBasic()`
 * @private
 * @param {Number} codePoint The basic numeric code point value.
 * @returns {Number} The numeric value of a basic code point (for use in
 * representing integers) in the range `0` to `base - 1`, or `base` if
 * the code point does not represent a value.
 */
var basicToDigit = function basicToDigit(codePoint) {
	if (codePoint - 0x30 < 0x0A) {
		return codePoint - 0x16;
	}
	if (codePoint - 0x41 < 0x1A) {
		return codePoint - 0x41;
	}
	if (codePoint - 0x61 < 0x1A) {
		return codePoint - 0x61;
	}
	return base;
};

/**
 * Converts a digit/integer into a basic code point.
 * @see `basicToDigit()`
 * @private
 * @param {Number} digit The numeric value of a basic code point.
 * @returns {Number} The basic code point whose value (when used for
 * representing integers) is `digit`, which needs to be in the range
 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
 * used; else, the lowercase form is used. The behavior is undefined
 * if `flag` is non-zero and `digit` has no uppercase form.
 */
var digitToBasic = function digitToBasic(digit, flag) {
	//  0..25 map to ASCII a..z or A..Z
	// 26..35 map to ASCII 0..9
	return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
};

/**
 * Bias adaptation function as per section 3.4 of RFC 3492.
 * https://tools.ietf.org/html/rfc3492#section-3.4
 * @private
 */
var adapt = function adapt(delta, numPoints, firstTime) {
	var k = 0;
	delta = firstTime ? floor(delta / damp) : delta >> 1;
	delta += floor(delta / numPoints);
	for (; /* no initialization */delta > baseMinusTMin * tMax >> 1; k += base) {
		delta = floor(delta / baseMinusTMin);
	}
	return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
};

/**
 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
 * symbols.
 * @memberOf punycode
 * @param {String} input The Punycode string of ASCII-only symbols.
 * @returns {String} The resulting string of Unicode symbols.
 */
var decode = function decode(input) {
	// Don't use UCS-2.
	var output = [];
	var inputLength = input.length;
	var i = 0;
	var n = initialN;
	var bias = initialBias;

	// Handle the basic code points: let `basic` be the number of input code
	// points before the last delimiter, or `0` if there is none, then copy
	// the first basic code points to the output.

	var basic = input.lastIndexOf(delimiter);
	if (basic < 0) {
		basic = 0;
	}

	for (var j = 0; j < basic; ++j) {
		// if it's not a basic code point
		if (input.charCodeAt(j) >= 0x80) {
			error$1('not-basic');
		}
		output.push(input.charCodeAt(j));
	}

	// Main decoding loop: start just after the last delimiter if any basic code
	// points were copied; start at the beginning otherwise.

	for (var index = basic > 0 ? basic + 1 : 0; index < inputLength;) /* no final expression */{

		// `index` is the index of the next character to be consumed.
		// Decode a generalized variable-length integer into `delta`,
		// which gets added to `i`. The overflow checking is easier
		// if we increase `i` as we go, then subtract off its starting
		// value at the end to obtain `delta`.
		var oldi = i;
		for (var w = 1, k = base;; /* no condition */k += base) {

			if (index >= inputLength) {
				error$1('invalid-input');
			}

			var digit = basicToDigit(input.charCodeAt(index++));

			if (digit >= base || digit > floor((maxInt - i) / w)) {
				error$1('overflow');
			}

			i += digit * w;
			var t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;

			if (digit < t) {
				break;
			}

			var baseMinusT = base - t;
			if (w > floor(maxInt / baseMinusT)) {
				error$1('overflow');
			}

			w *= baseMinusT;
		}

		var out = output.length + 1;
		bias = adapt(i - oldi, out, oldi == 0);

		// `i` was supposed to wrap around from `out` to `0`,
		// incrementing `n` each time, so we'll fix that now:
		if (floor(i / out) > maxInt - n) {
			error$1('overflow');
		}

		n += floor(i / out);
		i %= out;

		// Insert `n` at position `i` of the output.
		output.splice(i++, 0, n);
	}

	return String.fromCodePoint.apply(String, output);
};

/**
 * Converts a string of Unicode symbols (e.g. a domain name label) to a
 * Punycode string of ASCII-only symbols.
 * @memberOf punycode
 * @param {String} input The string of Unicode symbols.
 * @returns {String} The resulting Punycode string of ASCII-only symbols.
 */
var encode = function encode(input) {
	var output = [];

	// Convert the input in UCS-2 to an array of Unicode code points.
	input = ucs2decode(input);

	// Cache the length.
	var inputLength = input.length;

	// Initialize the state.
	var n = initialN;
	var delta = 0;
	var bias = initialBias;

	// Handle the basic code points.
	var _iteratorNormalCompletion = true;
	var _didIteratorError = false;
	var _iteratorError = undefined;

	try {
		for (var _iterator = input[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
			var _currentValue2 = _step.value;

			if (_currentValue2 < 0x80) {
				output.push(stringFromCharCode(_currentValue2));
			}
		}
	} catch (err) {
		_didIteratorError = true;
		_iteratorError = err;
	} finally {
		try {
			if (!_iteratorNormalCompletion && _iterator.return) {
				_iterator.return();
			}
		} finally {
			if (_didIteratorError) {
				throw _iteratorError;
			}
		}
	}

	var basicLength = output.length;
	var handledCPCount = basicLength;

	// `handledCPCount` is the number of code points that have been handled;
	// `basicLength` is the number of basic code points.

	// Finish the basic string with a delimiter unless it's empty.
	if (basicLength) {
		output.push(delimiter);
	}

	// Main encoding loop:
	while (handledCPCount < inputLength) {

		// All non-basic code points < n have been handled already. Find the next
		// larger one:
		var m = maxInt;
		var _iteratorNormalCompletion2 = true;
		var _didIteratorError2 = false;
		var _iteratorError2 = undefined;

		try {
			for (var _iterator2 = input[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
				var currentValue = _step2.value;

				if (currentValue >= n && currentValue < m) {
					m = currentValue;
				}
			}

			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
			// but guard against overflow.
		} catch (err) {
			_didIteratorError2 = true;
			_iteratorError2 = err;
		} finally {
			try {
				if (!_iteratorNormalCompletion2 && _iterator2.return) {
					_iterator2.return();
				}
			} finally {
				if (_didIteratorError2) {
					throw _iteratorError2;
				}
			}
		}

		var handledCPCountPlusOne = handledCPCount + 1;
		if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
			error$1('overflow');
		}

		delta += (m - n) * handledCPCountPlusOne;
		n = m;

		var _iteratorNormalCompletion3 = true;
		var _didIteratorError3 = false;
		var _iteratorError3 = undefined;

		try {
			for (var _iterator3 = input[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
				var _currentValue = _step3.value;

				if (_currentValue < n && ++delta > maxInt) {
					error$1('overflow');
				}
				if (_currentValue == n) {
					// Represent delta as a generalized variable-length integer.
					var q = delta;
					for (var k = base;; /* no condition */k += base) {
						var t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
						if (q < t) {
							break;
						}
						var qMinusT = q - t;
						var baseMinusT = base - t;
						output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0)));
						q = floor(qMinusT / baseMinusT);
					}

					output.push(stringFromCharCode(digitToBasic(q, 0)));
					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
					delta = 0;
					++handledCPCount;
				}
			}
		} catch (err) {
			_didIteratorError3 = true;
			_iteratorError3 = err;
		} finally {
			try {
				if (!_iteratorNormalCompletion3 && _iterator3.return) {
					_iterator3.return();
				}
			} finally {
				if (_didIteratorError3) {
					throw _iteratorError3;
				}
			}
		}

		++delta;
		++n;
	}
	return output.join('');
};

/**
 * Converts a Punycode string representing a domain name or an email address
 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
 * it doesn't matter if you call it on a string that has already been
 * converted to Unicode.
 * @memberOf punycode
 * @param {String} input The Punycoded domain name or email address to
 * convert to Unicode.
 * @returns {String} The Unicode representation of the given Punycode
 * string.
 */
var toUnicode = function toUnicode(input) {
	return mapDomain(input, function (string) {
		return regexPunycode.test(string) ? decode(string.slice(4).toLowerCase()) : string;
	});
};

/**
 * Converts a Unicode string representing a domain name or an email address to
 * Punycode. Only the non-ASCII parts of the domain name will be converted,
 * i.e. it doesn't matter if you call it with a domain that's already in
 * ASCII.
 * @memberOf punycode
 * @param {String} input The domain name or email address to convert, as a
 * Unicode string.
 * @returns {String} The Punycode representation of the given domain name or
 * email address.
 */
var toASCII = function toASCII(input) {
	return mapDomain(input, function (string) {
		return regexNonASCII.test(string) ? 'xn--' + encode(string) : string;
	});
};

/*--------------------------------------------------------------------------*/

/** Define the public API */
var punycode = {
	/**
  * A string representing the current Punycode.js version number.
  * @memberOf punycode
  * @type String
  */
	'version': '2.1.0',
	/**
  * An object of methods to convert from JavaScript's internal character
  * representation (UCS-2) to Unicode code points, and back.
  * @see <https://mathiasbynens.be/notes/javascript-encoding>
  * @memberOf punycode
  * @type Object
  */
	'ucs2': {
		'decode': ucs2decode,
		'encode': ucs2encode
	},
	'decode': decode,
	'encode': encode,
	'toASCII': toASCII,
	'toUnicode': toUnicode
};

/**
 * URI.js
 *
 * @fileoverview An RFC 3986 compliant, scheme extendable URI parsing/validating/resolving library for JavaScript.
 * @author <a href="mailto:gary.court@gmail.com">Gary Court</a>
 * @see http://github.com/garycourt/uri-js
 */
/**
 * Copyright 2011 Gary Court. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY GARY COURT ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GARY COURT OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of Gary Court.
 */
var SCHEMES = {};
function pctEncChar(chr) {
    var c = chr.charCodeAt(0);
    var e = void 0;
    if (c < 16) e = "%0" + c.toString(16).toUpperCase();else if (c < 128) e = "%" + c.toString(16).toUpperCase();else if (c < 2048) e = "%" + (c >> 6 | 192).toString(16).toUpperCase() + "%" + (c & 63 | 128).toString(16).toUpperCase();else e = "%" + (c >> 12 | 224).toString(16).toUpperCase() + "%" + (c >> 6 & 63 | 128).toString(16).toUpperCase() + "%" + (c & 63 | 128).toString(16).toUpperCase();
    return e;
}
function pctDecChars(str) {
    var newStr = "";
    var i = 0;
    var il = str.length;
    while (i < il) {
        var c = parseInt(str.substr(i + 1, 2), 16);
        if (c < 128) {
            newStr += String.fromCharCode(c);
            i += 3;
        } else if (c >= 194 && c < 224) {
            if (il - i >= 6) {
                var c2 = parseInt(str.substr(i + 4, 2), 16);
                newStr += String.fromCharCode((c & 31) << 6 | c2 & 63);
            } else {
                newStr += str.substr(i, 6);
            }
            i += 6;
        } else if (c >= 224) {
            if (il - i >= 9) {
                var _c = parseInt(str.substr(i + 4, 2), 16);
                var c3 = parseInt(str.substr(i + 7, 2), 16);
                newStr += String.fromCharCode((c & 15) << 12 | (_c & 63) << 6 | c3 & 63);
            } else {
                newStr += str.substr(i, 9);
            }
            i += 9;
        } else {
            newStr += str.substr(i, 3);
            i += 3;
        }
    }
    return newStr;
}
function _normalizeComponentEncoding(components, protocol) {
    function decodeUnreserved(str) {
        var decStr = pctDecChars(str);
        return !decStr.match(protocol.UNRESERVED) ? str : decStr;
    }
    if (components.scheme) components.scheme = String(components.scheme).replace(protocol.PCT_ENCODED, decodeUnreserved).toLowerCase().replace(protocol.NOT_SCHEME, "");
    if (components.userinfo !== undefined) components.userinfo = String(components.userinfo).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(protocol.NOT_USERINFO, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);
    if (components.host !== undefined) components.host = String(components.host).replace(protocol.PCT_ENCODED, decodeUnreserved).toLowerCase().replace(protocol.NOT_HOST, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);
    if (components.path !== undefined) components.path = String(components.path).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(components.scheme ? protocol.NOT_PATH : protocol.NOT_PATH_NOSCHEME, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);
    if (components.query !== undefined) components.query = String(components.query).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(protocol.NOT_QUERY, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);
    if (components.fragment !== undefined) components.fragment = String(components.fragment).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(protocol.NOT_FRAGMENT, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);
    return components;
}

var URI_PARSE = /^(?:([^:\/?#]+):)?(?:\/\/((?:([^\/?#@]*)@)?(\[[\dA-F:.]+\]|[^\/?#:]*)(?:\:(\d*))?))?([^?#]*)(?:\?([^#]*))?(?:#((?:.|\n|\r)*))?/i;
var NO_MATCH_IS_UNDEFINED = "".match(/(){0}/)[1] === undefined;
function parse(uriString) {
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    var components = {};
    var protocol = options.iri !== false ? IRI_PROTOCOL : URI_PROTOCOL;
    if (options.reference === "suffix") uriString = (options.scheme ? options.scheme + ":" : "") + "//" + uriString;
    var matches = uriString.match(URI_PARSE);
    if (matches) {
        if (NO_MATCH_IS_UNDEFINED) {
            //store each component
            components.scheme = matches[1];
            components.userinfo = matches[3];
            components.host = matches[4];
            components.port = parseInt(matches[5], 10);
            components.path = matches[6] || "";
            components.query = matches[7];
            components.fragment = matches[8];
            //fix port number
            if (isNaN(components.port)) {
                components.port = matches[5];
            }
        } else {
            //store each component
            components.scheme = matches[1] || undefined;
            components.userinfo = uriString.indexOf("@") !== -1 ? matches[3] : undefined;
            components.host = uriString.indexOf("//") !== -1 ? matches[4] : undefined;
            components.port = parseInt(matches[5], 10);
            components.path = matches[6] || "";
            components.query = uriString.indexOf("?") !== -1 ? matches[7] : undefined;
            components.fragment = uriString.indexOf("#") !== -1 ? matches[8] : undefined;
            //fix port number
            if (isNaN(components.port)) {
                components.port = uriString.match(/\/\/(?:.|\n)*\:(?:\/|\?|\#|$)/) ? matches[4] : undefined;
            }
        }
        //strip brackets from IPv6 hosts
        if (components.host) {
            components.host = components.host.replace(protocol.IPV6ADDRESS, "$1");
        }
        //determine reference type
        if (components.scheme === undefined && components.userinfo === undefined && components.host === undefined && components.port === undefined && !components.path && components.query === undefined) {
            components.reference = "same-document";
        } else if (components.scheme === undefined) {
            components.reference = "relative";
        } else if (components.fragment === undefined) {
            components.reference = "absolute";
        } else {
            components.reference = "uri";
        }
        //check for reference errors
        if (options.reference && options.reference !== "suffix" && options.reference !== components.reference) {
            components.error = components.error || "URI is not a " + options.reference + " reference.";
        }
        //find scheme handler
        var schemeHandler = SCHEMES[(options.scheme || components.scheme || "").toLowerCase()];
        //check if scheme can't handle IRIs
        if (!options.unicodeSupport && (!schemeHandler || !schemeHandler.unicodeSupport)) {
            //if host component is a domain name
            if (components.host && (options.domainHost || schemeHandler && schemeHandler.domainHost)) {
                //convert Unicode IDN -> ASCII IDN
                try {
                    components.host = punycode.toASCII(components.host.replace(protocol.PCT_ENCODED, pctDecChars).toLowerCase());
                } catch (e) {
                    components.error = components.error || "Host's domain name can not be converted to ASCII via punycode: " + e;
                }
            }
            //convert IRI -> URI
            _normalizeComponentEncoding(components, URI_PROTOCOL);
        } else {
            //normalize encodings
            _normalizeComponentEncoding(components, protocol);
        }
        //perform scheme specific parsing
        if (schemeHandler && schemeHandler.parse) {
            schemeHandler.parse(components, options);
        }
    } else {
        components.error = components.error || "URI can not be parsed.";
    }
    return components;
}

function _recomposeAuthority(components, options) {
    var protocol = options.iri !== false ? IRI_PROTOCOL : URI_PROTOCOL;
    var uriTokens = [];
    if (components.userinfo !== undefined) {
        uriTokens.push(components.userinfo);
        uriTokens.push("@");
    }
    if (components.host !== undefined) {
        //ensure IPv6 addresses are bracketed
        uriTokens.push(String(components.host).replace(protocol.IPV6ADDRESS, "[$1]"));
    }
    if (typeof components.port === "number") {
        uriTokens.push(":");
        uriTokens.push(components.port.toString(10));
    }
    return uriTokens.length ? uriTokens.join("") : undefined;
}

var RDS1 = /^\.\.?\//;
var RDS2 = /^\/\.(\/|$)/;
var RDS3 = /^\/\.\.(\/|$)/;
var RDS5 = /^\/?(?:.|\n)*?(?=\/|$)/;
function removeDotSegments(input) {
    var output = [];
    while (input.length) {
        if (input.match(RDS1)) {
            input = input.replace(RDS1, "");
        } else if (input.match(RDS2)) {
            input = input.replace(RDS2, "/");
        } else if (input.match(RDS3)) {
            input = input.replace(RDS3, "/");
            output.pop();
        } else if (input === "." || input === "..") {
            input = "";
        } else {
            var im = input.match(RDS5);
            if (im) {
                var s = im[0];
                input = input.slice(s.length);
                output.push(s);
            } else {
                throw new Error("Unexpected dot segment condition");
            }
        }
    }
    return output.join("");
}

function serialize(components) {
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    var protocol = options.iri ? IRI_PROTOCOL : URI_PROTOCOL;
    var uriTokens = [];
    //find scheme handler
    var schemeHandler = SCHEMES[(options.scheme || components.scheme || "").toLowerCase()];
    //perform scheme specific serialization
    if (schemeHandler && schemeHandler.serialize) schemeHandler.serialize(components, options);
    if (components.host) {
        //if host component is an IPv6 address
        if (protocol.IPV6ADDRESS.test(components.host)) {
            //TODO: normalize IPv6 address as per RFC 5952
        } else if (options.domainHost || schemeHandler && schemeHandler.domainHost) {
            //convert IDN via punycode
            try {
                components.host = !options.iri ? punycode.toASCII(components.host.replace(protocol.PCT_ENCODED, pctDecChars).toLowerCase()) : punycode.toUnicode(components.host);
            } catch (e) {
                components.error = components.error || "Host's domain name can not be converted to " + (!options.iri ? "ASCII" : "Unicode") + " via punycode: " + e;
            }
        }
    }
    //normalize encoding
    _normalizeComponentEncoding(components, protocol);
    if (options.reference !== "suffix" && components.scheme) {
        uriTokens.push(components.scheme);
        uriTokens.push(":");
    }
    var authority = _recomposeAuthority(components, options);
    if (authority !== undefined) {
        if (options.reference !== "suffix") {
            uriTokens.push("//");
        }
        uriTokens.push(authority);
        if (components.path && components.path.charAt(0) !== "/") {
            uriTokens.push("/");
        }
    }
    if (components.path !== undefined) {
        var s = components.path;
        if (!options.absolutePath && (!schemeHandler || !schemeHandler.absolutePath)) {
            s = removeDotSegments(s);
        }
        if (authority === undefined) {
            s = s.replace(/^\/\//, "/%2F"); //don't allow the path to start with "//"
        }
        uriTokens.push(s);
    }
    if (components.query !== undefined) {
        uriTokens.push("?");
        uriTokens.push(components.query);
    }
    if (components.fragment !== undefined) {
        uriTokens.push("#");
        uriTokens.push(components.fragment);
    }
    return uriTokens.join(""); //merge tokens into a string
}

function resolveComponents(base, relative) {
    var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
    var skipNormalization = arguments[3];

    var target = {};
    if (!skipNormalization) {
        base = parse(serialize(base, options), options); //normalize base components
        relative = parse(serialize(relative, options), options); //normalize relative components
    }
    options = options || {};
    if (!options.tolerant && relative.scheme) {
        target.scheme = relative.scheme;
        //target.authority = relative.authority;
        target.userinfo = relative.userinfo;
        target.host = relative.host;
        target.port = relative.port;
        target.path = removeDotSegments(relative.path || "");
        target.query = relative.query;
    } else {
        if (relative.userinfo !== undefined || relative.host !== undefined || relative.port !== undefined) {
            //target.authority = relative.authority;
            target.userinfo = relative.userinfo;
            target.host = relative.host;
            target.port = relative.port;
            target.path = removeDotSegments(relative.path || "");
            target.query = relative.query;
        } else {
            if (!relative.path) {
                target.path = base.path;
                if (relative.query !== undefined) {
                    target.query = relative.query;
                } else {
                    target.query = base.query;
                }
            } else {
                if (relative.path.charAt(0) === "/") {
                    target.path = removeDotSegments(relative.path);
                } else {
                    if ((base.userinfo !== undefined || base.host !== undefined || base.port !== undefined) && !base.path) {
                        target.path = "/" + relative.path;
                    } else if (!base.path) {
                        target.path = relative.path;
                    } else {
                        target.path = base.path.slice(0, base.path.lastIndexOf("/") + 1) + relative.path;
                    }
                    target.path = removeDotSegments(target.path);
                }
                target.query = relative.query;
            }
            //target.authority = base.authority;
            target.userinfo = base.userinfo;
            target.host = base.host;
            target.port = base.port;
        }
        target.scheme = base.scheme;
    }
    target.fragment = relative.fragment;
    return target;
}

function resolve(baseURI, relativeURI, options) {
    return serialize(resolveComponents(parse(baseURI, options), parse(relativeURI, options), options, true), options);
}

function normalize(uri, options) {
    if (typeof uri === "string") {
        uri = serialize(parse(uri, options), options);
    } else if (typeOf(uri) === "object") {
        uri = parse(serialize(uri, options), options);
    }
    return uri;
}

function equal(uriA, uriB, options) {
    if (typeof uriA === "string") {
        uriA = serialize(parse(uriA, options), options);
    } else if (typeOf(uriA) === "object") {
        uriA = serialize(uriA, options);
    }
    if (typeof uriB === "string") {
        uriB = serialize(parse(uriB, options), options);
    } else if (typeOf(uriB) === "object") {
        uriB = serialize(uriB, options);
    }
    return uriA === uriB;
}

function escapeComponent(str, options) {
    return str && str.toString().replace(!options || !options.iri ? URI_PROTOCOL.ESCAPE : IRI_PROTOCOL.ESCAPE, pctEncChar);
}

function unescapeComponent(str, options) {
    return str && str.toString().replace(!options || !options.iri ? URI_PROTOCOL.PCT_ENCODED : IRI_PROTOCOL.PCT_ENCODED, pctDecChars);
}

var http = {
    scheme: "http",
    domainHost: true,
    parse: function parse(components, options) {
        //report missing host
        if (!components.host) {
            components.error = components.error || "HTTP URIs must have a host.";
        }
        return components;
    },
    serialize: function serialize(components, options) {
        //normalize the default port
        if (components.port === (String(components.scheme).toLowerCase() !== "https" ? 80 : 443) || components.port === "") {
            components.port = undefined;
        }
        //normalize the empty path
        if (!components.path) {
            components.path = "/";
        }
        //NOTE: We do not parse query strings for HTTP URIs
        //as WWW Form Url Encoded query strings are part of the HTML4+ spec,
        //and not the HTTP spec.
        return components;
    }
};

var https = {
    scheme: "https",
    domainHost: http.domainHost,
    parse: http.parse,
    serialize: http.serialize
};

var O = {};
var isIRI = true;
//RFC 3986
var UNRESERVED$$ = "[A-Za-z0-9\\-\\.\\_\\~" + (isIRI ? "\\xA0-\\u200D\\u2010-\\u2029\\u202F-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF" : "") + "]";
var HEXDIG$$ = "[0-9A-Fa-f]"; //case-insensitive
var PCT_ENCODED$ = subexp(subexp("%[EFef]" + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$) + "|" + subexp("%[89A-Fa-f]" + HEXDIG$$ + "%" + HEXDIG$$ + HEXDIG$$) + "|" + subexp("%" + HEXDIG$$ + HEXDIG$$)); //expanded
//RFC 5322, except these symbols as per RFC 6068: @ : / ? # [ ] & ; =
//const ATEXT$$ = "[A-Za-z0-9\\!\\#\\$\\%\\&\\'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\|\\}\\~]";
//const WSP$$ = "[\\x20\\x09]";
//const OBS_QTEXT$$ = "[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x7F]";  //(%d1-8 / %d11-12 / %d14-31 / %d127)
//const QTEXT$$ = merge("[\\x21\\x23-\\x5B\\x5D-\\x7E]", OBS_QTEXT$$);  //%d33 / %d35-91 / %d93-126 / obs-qtext
//const VCHAR$$ = "[\\x21-\\x7E]";
//const WSP$$ = "[\\x20\\x09]";
//const OBS_QP$ = subexp("\\\\" + merge("[\\x00\\x0D\\x0A]", OBS_QTEXT$$));  //%d0 / CR / LF / obs-qtext
//const FWS$ = subexp(subexp(WSP$$ + "*" + "\\x0D\\x0A") + "?" + WSP$$ + "+");
//const QUOTED_PAIR$ = subexp(subexp("\\\\" + subexp(VCHAR$$ + "|" + WSP$$)) + "|" + OBS_QP$);
//const QUOTED_STRING$ = subexp('\\"' + subexp(FWS$ + "?" + QCONTENT$) + "*" + FWS$ + "?" + '\\"');
var ATEXT$$ = "[A-Za-z0-9\\!\\$\\%\\'\\*\\+\\-\\^\\_\\`\\{\\|\\}\\~]";
var QTEXT$$ = "[\\!\\$\\%\\'\\(\\)\\*\\+\\,\\-\\.0-9\\<\\>A-Z\\x5E-\\x7E]";
var VCHAR$$ = merge(QTEXT$$, "[\\\"\\\\]");
var SOME_DELIMS$$ = "[\\!\\$\\'\\(\\)\\*\\+\\,\\;\\:\\@]";
var UNRESERVED = new RegExp(UNRESERVED$$, "g");
var PCT_ENCODED = new RegExp(PCT_ENCODED$, "g");
var NOT_LOCAL_PART = new RegExp(merge("[^]", ATEXT$$, "[\\.]", '[\\"]', VCHAR$$), "g");
var NOT_HFNAME = new RegExp(merge("[^]", UNRESERVED$$, SOME_DELIMS$$), "g");
var NOT_HFVALUE = NOT_HFNAME;
function decodeUnreserved(str) {
    var decStr = pctDecChars(str);
    return !decStr.match(UNRESERVED) ? str : decStr;
}
var mailto = {
    scheme: "mailto",
    parse: function parse$$1(components, options) {
        var to = components.to = components.path ? components.path.split(",") : [];
        components.path = undefined;
        if (components.query) {
            var unknownHeaders = false;
            var headers = {};
            var hfields = components.query.split("&");
            for (var x = 0, xl = hfields.length; x < xl; ++x) {
                var hfield = hfields[x].split("=");
                switch (hfield[0]) {
                    case "to":
                        var toAddrs = hfield[1].split(",");
                        for (var _x = 0, _xl = toAddrs.length; _x < _xl; ++_x) {
                            to.push(toAddrs[_x]);
                        }
                        break;
                    case "subject":
                        components.subject = unescapeComponent(hfield[1], options);
                        break;
                    case "body":
                        components.body = unescapeComponent(hfield[1], options);
                        break;
                    default:
                        unknownHeaders = true;
                        headers[unescapeComponent(hfield[0], options)] = unescapeComponent(hfield[1], options);
                        break;
                }
            }
            if (unknownHeaders) components.headers = headers;
        }
        components.query = undefined;
        for (var _x2 = 0, _xl2 = to.length; _x2 < _xl2; ++_x2) {
            var addr = to[_x2].split("@");
            addr[0] = unescapeComponent(addr[0]);
            if (!options.unicodeSupport) {
                //convert Unicode IDN -> ASCII IDN
                try {
                    addr[1] = punycode.toASCII(unescapeComponent(addr[1], options).toLowerCase());
                } catch (e) {
                    components.error = components.error || "Email address's domain name can not be converted to ASCII via punycode: " + e;
                }
            } else {
                addr[1] = unescapeComponent(addr[1], options).toLowerCase();
            }
            to[_x2] = addr.join("@");
        }
        return components;
    },
    serialize: function serialize$$1(components, options) {
        var to = toArray(components.to);
        if (to) {
            for (var x = 0, xl = to.length; x < xl; ++x) {
                var toAddr = String(to[x]);
                var atIdx = toAddr.lastIndexOf("@");
                var localPart = toAddr.slice(0, atIdx).replace(PCT_ENCODED, decodeUnreserved).replace(PCT_ENCODED, toUpperCase).replace(NOT_LOCAL_PART, pctEncChar);
                var domain = toAddr.slice(atIdx + 1);
                //convert IDN via punycode
                try {
                    domain = !options.iri ? punycode.toASCII(unescapeComponent(domain, options).toLowerCase()) : punycode.toUnicode(domain);
                } catch (e) {
                    components.error = components.error || "Email address's domain name can not be converted to " + (!options.iri ? "ASCII" : "Unicode") + " via punycode: " + e;
                }
                to[x] = localPart + "@" + domain;
            }
            components.path = to.join(",");
        }
        var headers = components.headers = components.headers || {};
        if (components.subject) headers["subject"] = components.subject;
        if (components.body) headers["body"] = components.body;
        var fields = [];
        for (var name in headers) {
            if (headers[name] !== O[name]) {
                fields.push(name.replace(PCT_ENCODED, decodeUnreserved).replace(PCT_ENCODED, toUpperCase).replace(NOT_HFNAME, pctEncChar) + "=" + headers[name].replace(PCT_ENCODED, decodeUnreserved).replace(PCT_ENCODED, toUpperCase).replace(NOT_HFVALUE, pctEncChar));
            }
        }
        if (fields.length) {
            components.query = fields.join("&");
        }
        return components;
    }
};

var NID$ = "(?:[0-9A-Za-z][0-9A-Za-z\\-]{1,31})";
var URN_SCHEME = new RegExp("^urn\\:(" + NID$ + ")$");
var URN_PARSE = /^([^\:]+)\:(.*)/;
var URN_EXCLUDED = /[\x00-\x20\\\"\&\<\>\[\]\^\`\{\|\}\~\x7F-\xFF]/g;
//RFC 2141
var urn = {
    scheme: "urn",
    parse: function parse$$1(components, options) {
        var matches = components.path && components.path.match(URN_PARSE);
        if (matches) {
            var scheme = "urn:" + matches[1].toLowerCase();
            var schemeHandler = SCHEMES[scheme];
            //in order to serialize properly,
            //every URN must have a serializer that calls the URN serializer
            if (!schemeHandler) {
                //create fake scheme handler
                schemeHandler = SCHEMES[scheme] = {
                    scheme: scheme,
                    parse: function parse$$1(components, options) {
                        return components;
                    },
                    serialize: SCHEMES["urn"].serialize
                };
            }
            components.scheme = scheme;
            components.path = matches[2];
            components = schemeHandler.parse(components, options);
        } else {
            components.error = components.error || "URN can not be parsed.";
        }
        return components;
    },
    serialize: function serialize$$1(components, options) {
        var scheme = components.scheme || options.scheme;
        if (scheme && scheme !== "urn") {
            var matches = scheme.match(URN_SCHEME) || ["urn:" + scheme, scheme];
            components.scheme = "urn";
            components.path = matches[1] + ":" + (components.path ? components.path.replace(URN_EXCLUDED, pctEncChar) : "");
        }
        return components;
    }
};

var UUID = /^[0-9A-Fa-f]{8}(?:\-[0-9A-Fa-f]{4}){3}\-[0-9A-Fa-f]{12}$/;
//RFC 4122
var uuid = {
    scheme: "urn:uuid",
    parse: function parse$$1(components, options) {
        if (!options.tolerant && (!components.path || !components.path.match(UUID))) {
            components.error = components.error || "UUID is not valid.";
        }
        return components;
    },
    serialize: function serialize$$1(components, options) {
        //ensure UUID is valid
        if (!options.tolerant && (!components.path || !components.path.match(UUID))) {
            //invalid UUIDs can not have this scheme
            components.scheme = undefined;
        } else {
            //normalize UUID
            components.path = (components.path || "").toLowerCase();
        }
        return SCHEMES["urn"].serialize(components, options);
    }
};

SCHEMES["http"] = http;
SCHEMES["https"] = https;
SCHEMES["mailto"] = mailto;
SCHEMES["urn"] = urn;
SCHEMES["urn:uuid"] = uuid;

exports.SCHEMES = SCHEMES;
exports.pctEncChar = pctEncChar;
exports.pctDecChars = pctDecChars;
exports.parse = parse;
exports.removeDotSegments = removeDotSegments;
exports.serialize = serialize;
exports.resolveComponents = resolveComponents;
exports.resolve = resolve;
exports.normalize = normalize;
exports.equal = equal;
exports.escapeComponent = escapeComponent;
exports.unescapeComponent = unescapeComponent;

Object.defineProperty(exports, '__esModule', { value: true });

})));


},{}],108:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

var punycode = require('punycode');
var util = require('./util');

exports.parse = urlParse;
exports.resolve = urlResolve;
exports.resolveObject = urlResolveObject;
exports.format = urlFormat;

exports.Url = Url;

function Url() {
  this.protocol = null;
  this.slashes = null;
  this.auth = null;
  this.host = null;
  this.port = null;
  this.hostname = null;
  this.hash = null;
  this.search = null;
  this.query = null;
  this.pathname = null;
  this.path = null;
  this.href = null;
}

// Reference: RFC 3986, RFC 1808, RFC 2396

// define these here so at least they only have to be
// compiled once on the first module load.
var protocolPattern = /^([a-z0-9.+-]+:)/i,
    portPattern = /:[0-9]*$/,

    // Special case for a simple path URL
    simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,

    // RFC 2396: characters reserved for delimiting URLs.
    // We actually just auto-escape these.
    delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],

    // RFC 2396: characters not allowed for various reasons.
    unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),

    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
    autoEscape = ['\''].concat(unwise),
    // Characters that are never ever allowed in a hostname.
    // Note that any invalid chars are also handled, but these
    // are the ones that are *expected* to be seen, so we fast-path
    // them.
    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
    hostEndingChars = ['/', '?', '#'],
    hostnameMaxLen = 255,
    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
    // protocols that can allow "unsafe" and "unwise" chars.
    unsafeProtocol = {
      'javascript': true,
      'javascript:': true
    },
    // protocols that never have a hostname.
    hostlessProtocol = {
      'javascript': true,
      'javascript:': true
    },
    // protocols that always contain a // bit.
    slashedProtocol = {
      'http': true,
      'https': true,
      'ftp': true,
      'gopher': true,
      'file': true,
      'http:': true,
      'https:': true,
      'ftp:': true,
      'gopher:': true,
      'file:': true
    },
    querystring = require('querystring');

function urlParse(url, parseQueryString, slashesDenoteHost) {
  if (url && util.isObject(url) && url instanceof Url) return url;

  var u = new Url;
  u.parse(url, parseQueryString, slashesDenoteHost);
  return u;
}

Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
  if (!util.isString(url)) {
    throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
  }

  // Copy chrome, IE, opera backslash-handling behavior.
  // Back slashes before the query string get converted to forward slashes
  // See: https://code.google.com/p/chromium/issues/detail?id=25916
  var queryIndex = url.indexOf('?'),
      splitter =
          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
      uSplit = url.split(splitter),
      slashRegex = /\\/g;
  uSplit[0] = uSplit[0].replace(slashRegex, '/');
  url = uSplit.join(splitter);

  var rest = url;

  // trim before proceeding.
  // This is to support parse stuff like "  http://foo.com  \n"
  rest = rest.trim();

  if (!slashesDenoteHost && url.split('#').length === 1) {
    // Try fast path regexp
    var simplePath = simplePathPattern.exec(rest);
    if (simplePath) {
      this.path = rest;
      this.href = rest;
      this.pathname = simplePath[1];
      if (simplePath[2]) {
        this.search = simplePath[2];
        if (parseQueryString) {
          this.query = querystring.parse(this.search.substr(1));
        } else {
          this.query = this.search.substr(1);
        }
      } else if (parseQueryString) {
        this.search = '';
        this.query = {};
      }
      return this;
    }
  }

  var proto = protocolPattern.exec(rest);
  if (proto) {
    proto = proto[0];
    var lowerProto = proto.toLowerCase();
    this.protocol = lowerProto;
    rest = rest.substr(proto.length);
  }

  // figure out if it's got a host
  // user@server is *always* interpreted as a hostname, and url
  // resolution will treat //foo/bar as host=foo,path=bar because that's
  // how the browser resolves relative URLs.
  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
    var slashes = rest.substr(0, 2) === '//';
    if (slashes && !(proto && hostlessProtocol[proto])) {
      rest = rest.substr(2);
      this.slashes = true;
    }
  }

  if (!hostlessProtocol[proto] &&
      (slashes || (proto && !slashedProtocol[proto]))) {

    // there's a hostname.
    // the first instance of /, ?, ;, or # ends the host.
    //
    // If there is an @ in the hostname, then non-host chars *are* allowed
    // to the left of the last @ sign, unless some host-ending character
    // comes *before* the @-sign.
    // URLs are obnoxious.
    //
    // ex:
    // http://a@b@c/ => user:a@b host:c
    // http://a@b?@c => user:a host:c path:/?@c

    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
    // Review our test case against browsers more comprehensively.

    // find the first instance of any hostEndingChars
    var hostEnd = -1;
    for (var i = 0; i < hostEndingChars.length; i++) {
      var hec = rest.indexOf(hostEndingChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
        hostEnd = hec;
    }

    // at this point, either we have an explicit point where the
    // auth portion cannot go past, or the last @ char is the decider.
    var auth, atSign;
    if (hostEnd === -1) {
      // atSign can be anywhere.
      atSign = rest.lastIndexOf('@');
    } else {
      // atSign must be in auth portion.
      // http://a@b/c@d => host:b auth:a path:/c@d
      atSign = rest.lastIndexOf('@', hostEnd);
    }

    // Now we have a portion which is definitely the auth.
    // Pull that off.
    if (atSign !== -1) {
      auth = rest.slice(0, atSign);
      rest = rest.slice(atSign + 1);
      this.auth = decodeURIComponent(auth);
    }

    // the host is the remaining to the left of the first non-host char
    hostEnd = -1;
    for (var i = 0; i < nonHostChars.length; i++) {
      var hec = rest.indexOf(nonHostChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
        hostEnd = hec;
    }
    // if we still have not hit it, then the entire thing is a host.
    if (hostEnd === -1)
      hostEnd = rest.length;

    this.host = rest.slice(0, hostEnd);
    rest = rest.slice(hostEnd);

    // pull out port.
    this.parseHost();

    // we've indicated that there is a hostname,
    // so even if it's empty, it has to be present.
    this.hostname = this.hostname || '';

    // if hostname begins with [ and ends with ]
    // assume that it's an IPv6 address.
    var ipv6Hostname = this.hostname[0] === '[' &&
        this.hostname[this.hostname.length - 1] === ']';

    // validate a little.
    if (!ipv6Hostname) {
      var hostparts = this.hostname.split(/\./);
      for (var i = 0, l = hostparts.length; i < l; i++) {
        var part = hostparts[i];
        if (!part) continue;
        if (!part.match(hostnamePartPattern)) {
          var newpart = '';
          for (var j = 0, k = part.length; j < k; j++) {
            if (part.charCodeAt(j) > 127) {
              // we replace non-ASCII char with a temporary placeholder
              // we need this to make sure size of hostname is not
              // broken by replacing non-ASCII by nothing
              newpart += 'x';
            } else {
              newpart += part[j];
            }
          }
          // we test again with ASCII char only
          if (!newpart.match(hostnamePartPattern)) {
            var validParts = hostparts.slice(0, i);
            var notHost = hostparts.slice(i + 1);
            var bit = part.match(hostnamePartStart);
            if (bit) {
              validParts.push(bit[1]);
              notHost.unshift(bit[2]);
            }
            if (notHost.length) {
              rest = '/' + notHost.join('.') + rest;
            }
            this.hostname = validParts.join('.');
            break;
          }
        }
      }
    }

    if (this.hostname.length > hostnameMaxLen) {
      this.hostname = '';
    } else {
      // hostnames are always lower case.
      this.hostname = this.hostname.toLowerCase();
    }

    if (!ipv6Hostname) {
      // IDNA Support: Returns a punycoded representation of "domain".
      // It only converts parts of the domain name that
      // have non-ASCII characters, i.e. it doesn't matter if
      // you call it with a domain that already is ASCII-only.
      this.hostname = punycode.toASCII(this.hostname);
    }

    var p = this.port ? ':' + this.port : '';
    var h = this.hostname || '';
    this.host = h + p;
    this.href += this.host;

    // strip [ and ] from the hostname
    // the host field still retains them, though
    if (ipv6Hostname) {
      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
      if (rest[0] !== '/') {
        rest = '/' + rest;
      }
    }
  }

  // now rest is set to the post-host stuff.
  // chop off any delim chars.
  if (!unsafeProtocol[lowerProto]) {

    // First, make 100% sure that any "autoEscape" chars get
    // escaped, even if encodeURIComponent doesn't think they
    // need to be.
    for (var i = 0, l = autoEscape.length; i < l; i++) {
      var ae = autoEscape[i];
      if (rest.indexOf(ae) === -1)
        continue;
      var esc = encodeURIComponent(ae);
      if (esc === ae) {
        esc = escape(ae);
      }
      rest = rest.split(ae).join(esc);
    }
  }


  // chop off from the tail first.
  var hash = rest.indexOf('#');
  if (hash !== -1) {
    // got a fragment string.
    this.hash = rest.substr(hash);
    rest = rest.slice(0, hash);
  }
  var qm = rest.indexOf('?');
  if (qm !== -1) {
    this.search = rest.substr(qm);
    this.query = rest.substr(qm + 1);
    if (parseQueryString) {
      this.query = querystring.parse(this.query);
    }
    rest = rest.slice(0, qm);
  } else if (parseQueryString) {
    // no query string, but parseQueryString still requested
    this.search = '';
    this.query = {};
  }
  if (rest) this.pathname = rest;
  if (slashedProtocol[lowerProto] &&
      this.hostname && !this.pathname) {
    this.pathname = '/';
  }

  //to support http.request
  if (this.pathname || this.search) {
    var p = this.pathname || '';
    var s = this.search || '';
    this.path = p + s;
  }

  // finally, reconstruct the href based on what has been validated.
  this.href = this.format();
  return this;
};

// format a parsed object into a url string
function urlFormat(obj) {
  // ensure it's an object, and not a string url.
  // If it's an obj, this is a no-op.
  // this way, you can call url_format() on strings
  // to clean up potentially wonky urls.
  if (util.isString(obj)) obj = urlParse(obj);
  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
  return obj.format();
}

Url.prototype.format = function() {
  var auth = this.auth || '';
  if (auth) {
    auth = encodeURIComponent(auth);
    auth = auth.replace(/%3A/i, ':');
    auth += '@';
  }

  var protocol = this.protocol || '',
      pathname = this.pathname || '',
      hash = this.hash || '',
      host = false,
      query = '';

  if (this.host) {
    host = auth + this.host;
  } else if (this.hostname) {
    host = auth + (this.hostname.indexOf(':') === -1 ?
        this.hostname :
        '[' + this.hostname + ']');
    if (this.port) {
      host += ':' + this.port;
    }
  }

  if (this.query &&
      util.isObject(this.query) &&
      Object.keys(this.query).length) {
    query = querystring.stringify(this.query);
  }

  var search = this.search || (query && ('?' + query)) || '';

  if (protocol && protocol.substr(-1) !== ':') protocol += ':';

  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
  // unless they had them to begin with.
  if (this.slashes ||
      (!protocol || slashedProtocol[protocol]) && host !== false) {
    host = '//' + (host || '');
    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
  } else if (!host) {
    host = '';
  }

  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
  if (search && search.charAt(0) !== '?') search = '?' + search;

  pathname = pathname.replace(/[?#]/g, function(match) {
    return encodeURIComponent(match);
  });
  search = search.replace('#', '%23');

  return protocol + host + pathname + search + hash;
};

function urlResolve(source, relative) {
  return urlParse(source, false, true).resolve(relative);
}

Url.prototype.resolve = function(relative) {
  return this.resolveObject(urlParse(relative, false, true)).format();
};

function urlResolveObject(source, relative) {
  if (!source) return relative;
  return urlParse(source, false, true).resolveObject(relative);
}

Url.prototype.resolveObject = function(relative) {
  if (util.isString(relative)) {
    var rel = new Url();
    rel.parse(relative, false, true);
    relative = rel;
  }

  var result = new Url();
  var tkeys = Object.keys(this);
  for (var tk = 0; tk < tkeys.length; tk++) {
    var tkey = tkeys[tk];
    result[tkey] = this[tkey];
  }

  // hash is always overridden, no matter what.
  // even href="" will remove it.
  result.hash = relative.hash;

  // if the relative url is empty, then there's nothing left to do here.
  if (relative.href === '') {
    result.href = result.format();
    return result;
  }

  // hrefs like //foo/bar always cut to the protocol.
  if (relative.slashes && !relative.protocol) {
    // take everything except the protocol from relative
    var rkeys = Object.keys(relative);
    for (var rk = 0; rk < rkeys.length; rk++) {
      var rkey = rkeys[rk];
      if (rkey !== 'protocol')
        result[rkey] = relative[rkey];
    }

    //urlParse appends trailing / to urls like http://www.example.com
    if (slashedProtocol[result.protocol] &&
        result.hostname && !result.pathname) {
      result.path = result.pathname = '/';
    }

    result.href = result.format();
    return result;
  }

  if (relative.protocol && relative.protocol !== result.protocol) {
    // if it's a known url protocol, then changing
    // the protocol does weird things
    // first, if it's not file:, then we MUST have a host,
    // and if there was a path
    // to begin with, then we MUST have a path.
    // if it is file:, then the host is dropped,
    // because that's known to be hostless.
    // anything else is assumed to be absolute.
    if (!slashedProtocol[relative.protocol]) {
      var keys = Object.keys(relative);
      for (var v = 0; v < keys.length; v++) {
        var k = keys[v];
        result[k] = relative[k];
      }
      result.href = result.format();
      return result;
    }

    result.protocol = relative.protocol;
    if (!relative.host && !hostlessProtocol[relative.protocol]) {
      var relPath = (relative.pathname || '').split('/');
      while (relPath.length && !(relative.host = relPath.shift()));
      if (!relative.host) relative.host = '';
      if (!relative.hostname) relative.hostname = '';
      if (relPath[0] !== '') relPath.unshift('');
      if (relPath.length < 2) relPath.unshift('');
      result.pathname = relPath.join('/');
    } else {
      result.pathname = relative.pathname;
    }
    result.search = relative.search;
    result.query = relative.query;
    result.host = relative.host || '';
    result.auth = relative.auth;
    result.hostname = relative.hostname || relative.host;
    result.port = relative.port;
    // to support http.request
    if (result.pathname || result.search) {
      var p = result.pathname || '';
      var s = result.search || '';
      result.path = p + s;
    }
    result.slashes = result.slashes || relative.slashes;
    result.href = result.format();
    return result;
  }

  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
      isRelAbs = (
          relative.host ||
          relative.pathname && relative.pathname.charAt(0) === '/'
      ),
      mustEndAbs = (isRelAbs || isSourceAbs ||
                    (result.host && relative.pathname)),
      removeAllDots = mustEndAbs,
      srcPath = result.pathname && result.pathname.split('/') || [],
      relPath = relative.pathname && relative.pathname.split('/') || [],
      psychotic = result.protocol && !slashedProtocol[result.protocol];

  // if the url is a non-slashed url, then relative
  // links like ../.. should be able
  // to crawl up to the hostname, as well.  This is strange.
  // result.protocol has already been set by now.
  // Later on, put the first path part into the host field.
  if (psychotic) {
    result.hostname = '';
    result.port = null;
    if (result.host) {
      if (srcPath[0] === '') srcPath[0] = result.host;
      else srcPath.unshift(result.host);
    }
    result.host = '';
    if (relative.protocol) {
      relative.hostname = null;
      relative.port = null;
      if (relative.host) {
        if (relPath[0] === '') relPath[0] = relative.host;
        else relPath.unshift(relative.host);
      }
      relative.host = null;
    }
    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
  }

  if (isRelAbs) {
    // it's absolute.
    result.host = (relative.host || relative.host === '') ?
                  relative.host : result.host;
    result.hostname = (relative.hostname || relative.hostname === '') ?
                      relative.hostname : result.hostname;
    result.search = relative.search;
    result.query = relative.query;
    srcPath = relPath;
    // fall through to the dot-handling below.
  } else if (relPath.length) {
    // it's relative
    // throw away the existing file, and take the new path instead.
    if (!srcPath) srcPath = [];
    srcPath.pop();
    srcPath = srcPath.concat(relPath);
    result.search = relative.search;
    result.query = relative.query;
  } else if (!util.isNullOrUndefined(relative.search)) {
    // just pull out the search.
    // like href='?foo'.
    // Put this after the other two cases because it simplifies the booleans
    if (psychotic) {
      result.hostname = result.host = srcPath.shift();
      //occationaly the auth can get stuck only in host
      //this especially happens in cases like
      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
      var authInHost = result.host && result.host.indexOf('@') > 0 ?
                       result.host.split('@') : false;
      if (authInHost) {
        result.auth = authInHost.shift();
        result.host = result.hostname = authInHost.shift();
      }
    }
    result.search = relative.search;
    result.query = relative.query;
    //to support http.request
    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
      result.path = (result.pathname ? result.pathname : '') +
                    (result.search ? result.search : '');
    }
    result.href = result.format();
    return result;
  }

  if (!srcPath.length) {
    // no path at all.  easy.
    // we've already handled the other stuff above.
    result.pathname = null;
    //to support http.request
    if (result.search) {
      result.path = '/' + result.search;
    } else {
      result.path = null;
    }
    result.href = result.format();
    return result;
  }

  // if a url ENDs in . or .., then it must get a trailing slash.
  // however, if it ends in anything else non-slashy,
  // then it must NOT get a trailing slash.
  var last = srcPath.slice(-1)[0];
  var hasTrailingSlash = (
      (result.host || relative.host || srcPath.length > 1) &&
      (last === '.' || last === '..') || last === '');

  // strip single dots, resolve double dots to parent dir
  // if the path tries to go above the root, `up` ends up > 0
  var up = 0;
  for (var i = srcPath.length; i >= 0; i--) {
    last = srcPath[i];
    if (last === '.') {
      srcPath.splice(i, 1);
    } else if (last === '..') {
      srcPath.splice(i, 1);
      up++;
    } else if (up) {
      srcPath.splice(i, 1);
      up--;
    }
  }

  // if the path is allowed to go above the root, restore leading ..s
  if (!mustEndAbs && !removeAllDots) {
    for (; up--; up) {
      srcPath.unshift('..');
    }
  }

  if (mustEndAbs && srcPath[0] !== '' &&
      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
    srcPath.unshift('');
  }

  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
    srcPath.push('');
  }

  var isAbsolute = srcPath[0] === '' ||
      (srcPath[0] && srcPath[0].charAt(0) === '/');

  // put the host back
  if (psychotic) {
    result.hostname = result.host = isAbsolute ? '' :
                                    srcPath.length ? srcPath.shift() : '';
    //occationaly the auth can get stuck only in host
    //this especially happens in cases like
    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
    var authInHost = result.host && result.host.indexOf('@') > 0 ?
                     result.host.split('@') : false;
    if (authInHost) {
      result.auth = authInHost.shift();
      result.host = result.hostname = authInHost.shift();
    }
  }

  mustEndAbs = mustEndAbs || (result.host && srcPath.length);

  if (mustEndAbs && !isAbsolute) {
    srcPath.unshift('');
  }

  if (!srcPath.length) {
    result.pathname = null;
    result.path = null;
  } else {
    result.pathname = srcPath.join('/');
  }

  //to support request.http
  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
    result.path = (result.pathname ? result.pathname : '') +
                  (result.search ? result.search : '');
  }
  result.auth = relative.auth || result.auth;
  result.slashes = result.slashes || relative.slashes;
  result.href = result.format();
  return result;
};

Url.prototype.parseHost = function() {
  var host = this.host;
  var port = portPattern.exec(host);
  if (port) {
    port = port[0];
    if (port !== ':') {
      this.port = port.substr(1);
    }
    host = host.substr(0, host.length - port.length);
  }
  if (host) this.hostname = host;
};

},{"./util":109,"punycode":5,"querystring":96}],109:[function(require,module,exports){
'use strict';

module.exports = {
  isString: function(arg) {
    return typeof(arg) === 'string';
  },
  isObject: function(arg) {
    return typeof(arg) === 'object' && arg !== null;
  },
  isNull: function(arg) {
    return arg === null;
  },
  isNullOrUndefined: function(arg) {
    return arg == null;
  }
};

},{}],110:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _toDate = require('./lib/toDate');

var _toDate2 = _interopRequireDefault(_toDate);

var _toFloat = require('./lib/toFloat');

var _toFloat2 = _interopRequireDefault(_toFloat);

var _toInt = require('./lib/toInt');

var _toInt2 = _interopRequireDefault(_toInt);

var _toBoolean = require('./lib/toBoolean');

var _toBoolean2 = _interopRequireDefault(_toBoolean);

var _equals = require('./lib/equals');

var _equals2 = _interopRequireDefault(_equals);

var _contains = require('./lib/contains');

var _contains2 = _interopRequireDefault(_contains);

var _matches = require('./lib/matches');

var _matches2 = _interopRequireDefault(_matches);

var _isEmail = require('./lib/isEmail');

var _isEmail2 = _interopRequireDefault(_isEmail);

var _isURL = require('./lib/isURL');

var _isURL2 = _interopRequireDefault(_isURL);

var _isMACAddress = require('./lib/isMACAddress');

var _isMACAddress2 = _interopRequireDefault(_isMACAddress);

var _isIP = require('./lib/isIP');

var _isIP2 = _interopRequireDefault(_isIP);

var _isFQDN = require('./lib/isFQDN');

var _isFQDN2 = _interopRequireDefault(_isFQDN);

var _isBoolean = require('./lib/isBoolean');

var _isBoolean2 = _interopRequireDefault(_isBoolean);

var _isAlpha = require('./lib/isAlpha');

var _isAlpha2 = _interopRequireDefault(_isAlpha);

var _isAlphanumeric = require('./lib/isAlphanumeric');

var _isAlphanumeric2 = _interopRequireDefault(_isAlphanumeric);

var _isNumeric = require('./lib/isNumeric');

var _isNumeric2 = _interopRequireDefault(_isNumeric);

var _isPort = require('./lib/isPort');

var _isPort2 = _interopRequireDefault(_isPort);

var _isLowercase = require('./lib/isLowercase');

var _isLowercase2 = _interopRequireDefault(_isLowercase);

var _isUppercase = require('./lib/isUppercase');

var _isUppercase2 = _interopRequireDefault(_isUppercase);

var _isAscii = require('./lib/isAscii');

var _isAscii2 = _interopRequireDefault(_isAscii);

var _isFullWidth = require('./lib/isFullWidth');

var _isFullWidth2 = _interopRequireDefault(_isFullWidth);

var _isHalfWidth = require('./lib/isHalfWidth');

var _isHalfWidth2 = _interopRequireDefault(_isHalfWidth);

var _isVariableWidth = require('./lib/isVariableWidth');

var _isVariableWidth2 = _interopRequireDefault(_isVariableWidth);

var _isMultibyte = require('./lib/isMultibyte');

var _isMultibyte2 = _interopRequireDefault(_isMultibyte);

var _isSurrogatePair = require('./lib/isSurrogatePair');

var _isSurrogatePair2 = _interopRequireDefault(_isSurrogatePair);

var _isInt = require('./lib/isInt');

var _isInt2 = _interopRequireDefault(_isInt);

var _isFloat = require('./lib/isFloat');

var _isFloat2 = _interopRequireDefault(_isFloat);

var _isDecimal = require('./lib/isDecimal');

var _isDecimal2 = _interopRequireDefault(_isDecimal);

var _isHexadecimal = require('./lib/isHexadecimal');

var _isHexadecimal2 = _interopRequireDefault(_isHexadecimal);

var _isDivisibleBy = require('./lib/isDivisibleBy');

var _isDivisibleBy2 = _interopRequireDefault(_isDivisibleBy);

var _isHexColor = require('./lib/isHexColor');

var _isHexColor2 = _interopRequireDefault(_isHexColor);

var _isISRC = require('./lib/isISRC');

var _isISRC2 = _interopRequireDefault(_isISRC);

var _isMD = require('./lib/isMD5');

var _isMD2 = _interopRequireDefault(_isMD);

var _isHash = require('./lib/isHash');

var _isHash2 = _interopRequireDefault(_isHash);

var _isJSON = require('./lib/isJSON');

var _isJSON2 = _interopRequireDefault(_isJSON);

var _isEmpty = require('./lib/isEmpty');

var _isEmpty2 = _interopRequireDefault(_isEmpty);

var _isLength = require('./lib/isLength');

var _isLength2 = _interopRequireDefault(_isLength);

var _isByteLength = require('./lib/isByteLength');

var _isByteLength2 = _interopRequireDefault(_isByteLength);

var _isUUID = require('./lib/isUUID');

var _isUUID2 = _interopRequireDefault(_isUUID);

var _isMongoId = require('./lib/isMongoId');

var _isMongoId2 = _interopRequireDefault(_isMongoId);

var _isAfter = require('./lib/isAfter');

var _isAfter2 = _interopRequireDefault(_isAfter);

var _isBefore = require('./lib/isBefore');

var _isBefore2 = _interopRequireDefault(_isBefore);

var _isIn = require('./lib/isIn');

var _isIn2 = _interopRequireDefault(_isIn);

var _isCreditCard = require('./lib/isCreditCard');

var _isCreditCard2 = _interopRequireDefault(_isCreditCard);

var _isISIN = require('./lib/isISIN');

var _isISIN2 = _interopRequireDefault(_isISIN);

var _isISBN = require('./lib/isISBN');

var _isISBN2 = _interopRequireDefault(_isISBN);

var _isISSN = require('./lib/isISSN');

var _isISSN2 = _interopRequireDefault(_isISSN);

var _isMobilePhone = require('./lib/isMobilePhone');

var _isMobilePhone2 = _interopRequireDefault(_isMobilePhone);

var _isCurrency = require('./lib/isCurrency');

var _isCurrency2 = _interopRequireDefault(_isCurrency);

var _isISO = require('./lib/isISO8601');

var _isISO2 = _interopRequireDefault(_isISO);

var _isISO31661Alpha = require('./lib/isISO31661Alpha2');

var _isISO31661Alpha2 = _interopRequireDefault(_isISO31661Alpha);

var _isBase = require('./lib/isBase64');

var _isBase2 = _interopRequireDefault(_isBase);

var _isDataURI = require('./lib/isDataURI');

var _isDataURI2 = _interopRequireDefault(_isDataURI);

var _isMimeType = require('./lib/isMimeType');

var _isMimeType2 = _interopRequireDefault(_isMimeType);

var _isLatLong = require('./lib/isLatLong');

var _isLatLong2 = _interopRequireDefault(_isLatLong);

var _isPostalCode = require('./lib/isPostalCode');

var _isPostalCode2 = _interopRequireDefault(_isPostalCode);

var _ltrim = require('./lib/ltrim');

var _ltrim2 = _interopRequireDefault(_ltrim);

var _rtrim = require('./lib/rtrim');

var _rtrim2 = _interopRequireDefault(_rtrim);

var _trim = require('./lib/trim');

var _trim2 = _interopRequireDefault(_trim);

var _escape = require('./lib/escape');

var _escape2 = _interopRequireDefault(_escape);

var _unescape = require('./lib/unescape');

var _unescape2 = _interopRequireDefault(_unescape);

var _stripLow = require('./lib/stripLow');

var _stripLow2 = _interopRequireDefault(_stripLow);

var _whitelist = require('./lib/whitelist');

var _whitelist2 = _interopRequireDefault(_whitelist);

var _blacklist = require('./lib/blacklist');

var _blacklist2 = _interopRequireDefault(_blacklist);

var _isWhitelisted = require('./lib/isWhitelisted');

var _isWhitelisted2 = _interopRequireDefault(_isWhitelisted);

var _normalizeEmail = require('./lib/normalizeEmail');

var _normalizeEmail2 = _interopRequireDefault(_normalizeEmail);

var _toString = require('./lib/util/toString');

var _toString2 = _interopRequireDefault(_toString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var version = '9.2.0';

var validator = {
  version: version,
  toDate: _toDate2.default,
  toFloat: _toFloat2.default,
  toInt: _toInt2.default,
  toBoolean: _toBoolean2.default,
  equals: _equals2.default,
  contains: _contains2.default,
  matches: _matches2.default,
  isEmail: _isEmail2.default,
  isURL: _isURL2.default,
  isMACAddress: _isMACAddress2.default,
  isIP: _isIP2.default,
  isFQDN: _isFQDN2.default,
  isBoolean: _isBoolean2.default,
  isAlpha: _isAlpha2.default,
  isAlphanumeric: _isAlphanumeric2.default,
  isNumeric: _isNumeric2.default,
  isPort: _isPort2.default,
  isLowercase: _isLowercase2.default,
  isUppercase: _isUppercase2.default,
  isAscii: _isAscii2.default,
  isFullWidth: _isFullWidth2.default,
  isHalfWidth: _isHalfWidth2.default,
  isVariableWidth: _isVariableWidth2.default,
  isMultibyte: _isMultibyte2.default,
  isSurrogatePair: _isSurrogatePair2.default,
  isInt: _isInt2.default,
  isFloat: _isFloat2.default,
  isDecimal: _isDecimal2.default,
  isHexadecimal: _isHexadecimal2.default,
  isDivisibleBy: _isDivisibleBy2.default,
  isHexColor: _isHexColor2.default,
  isISRC: _isISRC2.default,
  isMD5: _isMD2.default,
  isHash: _isHash2.default,
  isJSON: _isJSON2.default,
  isEmpty: _isEmpty2.default,
  isLength: _isLength2.default,
  isByteLength: _isByteLength2.default,
  isUUID: _isUUID2.default,
  isMongoId: _isMongoId2.default,
  isAfter: _isAfter2.default,
  isBefore: _isBefore2.default,
  isIn: _isIn2.default,
  isCreditCard: _isCreditCard2.default,
  isISIN: _isISIN2.default,
  isISBN: _isISBN2.default,
  isISSN: _isISSN2.default,
  isMobilePhone: _isMobilePhone2.default,
  isPostalCode: _isPostalCode2.default,
  isCurrency: _isCurrency2.default,
  isISO8601: _isISO2.default,
  isISO31661Alpha2: _isISO31661Alpha2.default,
  isBase64: _isBase2.default,
  isDataURI: _isDataURI2.default,
  isMimeType: _isMimeType2.default,
  isLatLong: _isLatLong2.default,
  ltrim: _ltrim2.default,
  rtrim: _rtrim2.default,
  trim: _trim2.default,
  escape: _escape2.default,
  unescape: _unescape2.default,
  stripLow: _stripLow2.default,
  whitelist: _whitelist2.default,
  blacklist: _blacklist2.default,
  isWhitelisted: _isWhitelisted2.default,
  normalizeEmail: _normalizeEmail2.default,
  toString: _toString2.default
};

exports.default = validator;
module.exports = exports['default'];
},{"./lib/blacklist":112,"./lib/contains":113,"./lib/equals":114,"./lib/escape":115,"./lib/isAfter":116,"./lib/isAlpha":117,"./lib/isAlphanumeric":118,"./lib/isAscii":119,"./lib/isBase64":120,"./lib/isBefore":121,"./lib/isBoolean":122,"./lib/isByteLength":123,"./lib/isCreditCard":124,"./lib/isCurrency":125,"./lib/isDataURI":126,"./lib/isDecimal":127,"./lib/isDivisibleBy":128,"./lib/isEmail":129,"./lib/isEmpty":130,"./lib/isFQDN":131,"./lib/isFloat":132,"./lib/isFullWidth":133,"./lib/isHalfWidth":134,"./lib/isHash":135,"./lib/isHexColor":136,"./lib/isHexadecimal":137,"./lib/isIP":138,"./lib/isISBN":139,"./lib/isISIN":140,"./lib/isISO31661Alpha2":141,"./lib/isISO8601":142,"./lib/isISRC":143,"./lib/isISSN":144,"./lib/isIn":145,"./lib/isInt":146,"./lib/isJSON":147,"./lib/isLatLong":148,"./lib/isLength":149,"./lib/isLowercase":150,"./lib/isMACAddress":151,"./lib/isMD5":152,"./lib/isMimeType":153,"./lib/isMobilePhone":154,"./lib/isMongoId":155,"./lib/isMultibyte":156,"./lib/isNumeric":157,"./lib/isPort":158,"./lib/isPostalCode":159,"./lib/isSurrogatePair":160,"./lib/isURL":161,"./lib/isUUID":162,"./lib/isUppercase":163,"./lib/isVariableWidth":164,"./lib/isWhitelisted":165,"./lib/ltrim":166,"./lib/matches":167,"./lib/normalizeEmail":168,"./lib/rtrim":169,"./lib/stripLow":170,"./lib/toBoolean":171,"./lib/toDate":172,"./lib/toFloat":173,"./lib/toInt":174,"./lib/trim":175,"./lib/unescape":176,"./lib/util/toString":179,"./lib/whitelist":180}],111:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
var alpha = exports.alpha = {
  'en-US': /^[A-Z]+$/i,
  'cs-CZ': /^[A-ZÁČĎÉĚÍŇÓŘŠŤÚŮÝŽ]+$/i,
  'da-DK': /^[A-ZÆØÅ]+$/i,
  'de-DE': /^[A-ZÄÖÜß]+$/i,
  'el-GR': /^[Α-ω]+$/i,
  'es-ES': /^[A-ZÁÉÍÑÓÚÜ]+$/i,
  'fr-FR': /^[A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]+$/i,
  'it-IT': /^[A-ZÀÉÈÌÎÓÒÙ]+$/i,
  'nb-NO': /^[A-ZÆØÅ]+$/i,
  'nl-NL': /^[A-ZÁÉËÏÓÖÜÚ]+$/i,
  'nn-NO': /^[A-ZÆØÅ]+$/i,
  'hu-HU': /^[A-ZÁÉÍÓÖŐÚÜŰ]+$/i,
  'pl-PL': /^[A-ZĄĆĘŚŁŃÓŻŹ]+$/i,
  'pt-PT': /^[A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,
  'ru-RU': /^[А-ЯЁ]+$/i,
  'sr-RS@latin': /^[A-ZČĆŽŠĐ]+$/i,
  'sr-RS': /^[А-ЯЂЈЉЊЋЏ]+$/i,
  'sv-SE': /^[A-ZÅÄÖ]+$/i,
  'tr-TR': /^[A-ZÇĞİıÖŞÜ]+$/i,
  'uk-UA': /^[А-ЩЬЮЯЄIЇҐі]+$/i,
  ar: /^[ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/
};

var alphanumeric = exports.alphanumeric = {
  'en-US': /^[0-9A-Z]+$/i,
  'cs-CZ': /^[0-9A-ZÁČĎÉĚÍŇÓŘŠŤÚŮÝŽ]+$/i,
  'da-DK': /^[0-9A-ZÆØÅ]+$/i,
  'de-DE': /^[0-9A-ZÄÖÜß]+$/i,
  'el-GR': /^[0-9Α-ω]+$/i,
  'es-ES': /^[0-9A-ZÁÉÍÑÓÚÜ]+$/i,
  'fr-FR': /^[0-9A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]+$/i,
  'it-IT': /^[0-9A-ZÀÉÈÌÎÓÒÙ]+$/i,
  'hu-HU': /^[0-9A-ZÁÉÍÓÖŐÚÜŰ]+$/i,
  'nb-NO': /^[0-9A-ZÆØÅ]+$/i,
  'nl-NL': /^[0-9A-ZÁÉËÏÓÖÜÚ]+$/i,
  'nn-NO': /^[0-9A-ZÆØÅ]+$/i,
  'pl-PL': /^[0-9A-ZĄĆĘŚŁŃÓŻŹ]+$/i,
  'pt-PT': /^[0-9A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,
  'ru-RU': /^[0-9А-ЯЁ]+$/i,
  'sr-RS@latin': /^[0-9A-ZČĆŽŠĐ]+$/i,
  'sr-RS': /^[0-9А-ЯЂЈЉЊЋЏ]+$/i,
  'sv-SE': /^[0-9A-ZÅÄÖ]+$/i,
  'tr-TR': /^[0-9A-ZÇĞİıÖŞÜ]+$/i,
  'uk-UA': /^[0-9А-ЩЬЮЯЄIЇҐі]+$/i,
  ar: /^[٠١٢٣٤٥٦٧٨٩0-9ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/
};

var decimal = exports.decimal = {
  'en-US': '.',
  ar: '٫'
};

var englishLocales = exports.englishLocales = ['AU', 'GB', 'HK', 'IN', 'NZ', 'ZA', 'ZM'];

for (var locale, i = 0; i < englishLocales.length; i++) {
  locale = 'en-' + englishLocales[i];
  alpha[locale] = alpha['en-US'];
  alphanumeric[locale] = alphanumeric['en-US'];
  decimal[locale] = decimal['en-US'];
}

// Source: http://www.localeplanet.com/java/
var arabicLocales = exports.arabicLocales = ['AE', 'BH', 'DZ', 'EG', 'IQ', 'JO', 'KW', 'LB', 'LY', 'MA', 'QM', 'QA', 'SA', 'SD', 'SY', 'TN', 'YE'];

for (var _locale, _i = 0; _i < arabicLocales.length; _i++) {
  _locale = 'ar-' + arabicLocales[_i];
  alpha[_locale] = alpha.ar;
  alphanumeric[_locale] = alphanumeric.ar;
  decimal[_locale] = decimal.ar;
}

// Source: https://en.wikipedia.org/wiki/Decimal_mark
var dotDecimal = exports.dotDecimal = [];
var commaDecimal = exports.commaDecimal = ['cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'es-ES', 'fr-FR', 'it-IT', 'hu-HU', 'nb-NO', 'nn-NO', 'nl-NL', 'pl-Pl', 'pt-PT', 'ru-RU', 'sr-RS@latin', 'sr-RS', 'sv-SE', 'tr-TR', 'uk-UA'];

for (var _i2 = 0; _i2 < dotDecimal.length; _i2++) {
  decimal[dotDecimal[_i2]] = decimal['en-US'];
}

for (var _i3 = 0; _i3 < commaDecimal.length; _i3++) {
  decimal[commaDecimal[_i3]] = ',';
}

alpha['pt-BR'] = alpha['pt-PT'];
alphanumeric['pt-BR'] = alphanumeric['pt-PT'];
decimal['pt-BR'] = decimal['pt-PT'];
},{}],112:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = blacklist;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function blacklist(str, chars) {
  (0, _assertString2.default)(str);
  return str.replace(new RegExp('[' + chars + ']+', 'g'), '');
}
module.exports = exports['default'];
},{"./util/assertString":177}],113:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = contains;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _toString = require('./util/toString');

var _toString2 = _interopRequireDefault(_toString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function contains(str, elem) {
  (0, _assertString2.default)(str);
  return str.indexOf((0, _toString2.default)(elem)) >= 0;
}
module.exports = exports['default'];
},{"./util/assertString":177,"./util/toString":179}],114:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = equals;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function equals(str, comparison) {
  (0, _assertString2.default)(str);
  return str === comparison;
}
module.exports = exports['default'];
},{"./util/assertString":177}],115:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = escape;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function escape(str) {
  (0, _assertString2.default)(str);
  return str.replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#x27;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\//g, '&#x2F;').replace(/\\/g, '&#x5C;').replace(/`/g, '&#96;');
}
module.exports = exports['default'];
},{"./util/assertString":177}],116:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isAfter;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _toDate = require('./toDate');

var _toDate2 = _interopRequireDefault(_toDate);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isAfter(str) {
  var date = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : String(new Date());

  (0, _assertString2.default)(str);
  var comparison = (0, _toDate2.default)(date);
  var original = (0, _toDate2.default)(str);
  return !!(original && comparison && original > comparison);
}
module.exports = exports['default'];
},{"./toDate":172,"./util/assertString":177}],117:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isAlpha;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _alpha = require('./alpha');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isAlpha(str) {
  var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'en-US';

  (0, _assertString2.default)(str);
  if (locale in _alpha.alpha) {
    return _alpha.alpha[locale].test(str);
  }
  throw new Error('Invalid locale \'' + locale + '\'');
}
module.exports = exports['default'];
},{"./alpha":111,"./util/assertString":177}],118:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isAlphanumeric;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _alpha = require('./alpha');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isAlphanumeric(str) {
  var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'en-US';

  (0, _assertString2.default)(str);
  if (locale in _alpha.alphanumeric) {
    return _alpha.alphanumeric[locale].test(str);
  }
  throw new Error('Invalid locale \'' + locale + '\'');
}
module.exports = exports['default'];
},{"./alpha":111,"./util/assertString":177}],119:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isAscii;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable no-control-regex */
var ascii = /^[\x00-\x7F]+$/;
/* eslint-enable no-control-regex */

function isAscii(str) {
  (0, _assertString2.default)(str);
  return ascii.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],120:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isBase64;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var notBase64 = /[^A-Z0-9+\/=]/i;

function isBase64(str) {
  (0, _assertString2.default)(str);
  var len = str.length;
  if (!len || len % 4 !== 0 || notBase64.test(str)) {
    return false;
  }
  var firstPaddingChar = str.indexOf('=');
  return firstPaddingChar === -1 || firstPaddingChar === len - 1 || firstPaddingChar === len - 2 && str[len - 1] === '=';
}
module.exports = exports['default'];
},{"./util/assertString":177}],121:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isBefore;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _toDate = require('./toDate');

var _toDate2 = _interopRequireDefault(_toDate);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isBefore(str) {
  var date = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : String(new Date());

  (0, _assertString2.default)(str);
  var comparison = (0, _toDate2.default)(date);
  var original = (0, _toDate2.default)(str);
  return !!(original && comparison && original < comparison);
}
module.exports = exports['default'];
},{"./toDate":172,"./util/assertString":177}],122:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isBoolean;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isBoolean(str) {
  (0, _assertString2.default)(str);
  return ['true', 'false', '1', '0'].indexOf(str) >= 0;
}
module.exports = exports['default'];
},{"./util/assertString":177}],123:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.default = isByteLength;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable prefer-rest-params */
function isByteLength(str, options) {
  (0, _assertString2.default)(str);
  var min = void 0;
  var max = void 0;
  if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) === 'object') {
    min = options.min || 0;
    max = options.max;
  } else {
    // backwards compatibility: isByteLength(str, min [, max])
    min = arguments[1];
    max = arguments[2];
  }
  var len = encodeURI(str).split(/%..|./).length - 1;
  return len >= min && (typeof max === 'undefined' || len <= max);
}
module.exports = exports['default'];
},{"./util/assertString":177}],124:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isCreditCard;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable max-len */
var creditCard = /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11}|62[0-9]{14})$/;
/* eslint-enable max-len */

function isCreditCard(str) {
  (0, _assertString2.default)(str);
  var sanitized = str.replace(/[- ]+/g, '');
  if (!creditCard.test(sanitized)) {
    return false;
  }
  var sum = 0;
  var digit = void 0;
  var tmpNum = void 0;
  var shouldDouble = void 0;
  for (var i = sanitized.length - 1; i >= 0; i--) {
    digit = sanitized.substring(i, i + 1);
    tmpNum = parseInt(digit, 10);
    if (shouldDouble) {
      tmpNum *= 2;
      if (tmpNum >= 10) {
        sum += tmpNum % 10 + 1;
      } else {
        sum += tmpNum;
      }
    } else {
      sum += tmpNum;
    }
    shouldDouble = !shouldDouble;
  }
  return !!(sum % 10 === 0 ? sanitized : false);
}
module.exports = exports['default'];
},{"./util/assertString":177}],125:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isCurrency;

var _merge = require('./util/merge');

var _merge2 = _interopRequireDefault(_merge);

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function currencyRegex(options) {
  var decimal_digits = '\\d{' + options.digits_after_decimal[0] + '}';
  options.digits_after_decimal.forEach(function (digit, index) {
    if (index !== 0) decimal_digits = decimal_digits + '|\\d{' + digit + '}';
  });
  var symbol = '(\\' + options.symbol.replace(/\./g, '\\.') + ')' + (options.require_symbol ? '' : '?'),
      negative = '-?',
      whole_dollar_amount_without_sep = '[1-9]\\d*',
      whole_dollar_amount_with_sep = '[1-9]\\d{0,2}(\\' + options.thousands_separator + '\\d{3})*',
      valid_whole_dollar_amounts = ['0', whole_dollar_amount_without_sep, whole_dollar_amount_with_sep],
      whole_dollar_amount = '(' + valid_whole_dollar_amounts.join('|') + ')?',
      decimal_amount = '(\\' + options.decimal_separator + '(' + decimal_digits + '))' + (options.require_decimal ? '' : '?');
  var pattern = whole_dollar_amount + (options.allow_decimal || options.require_decimal ? decimal_amount : '');

  // default is negative sign before symbol, but there are two other options (besides parens)
  if (options.allow_negatives && !options.parens_for_negatives) {
    if (options.negative_sign_after_digits) {
      pattern += negative;
    } else if (options.negative_sign_before_digits) {
      pattern = negative + pattern;
    }
  }

  // South African Rand, for example, uses R 123 (space) and R-123 (no space)
  if (options.allow_negative_sign_placeholder) {
    pattern = '( (?!\\-))?' + pattern;
  } else if (options.allow_space_after_symbol) {
    pattern = ' ?' + pattern;
  } else if (options.allow_space_after_digits) {
    pattern += '( (?!$))?';
  }

  if (options.symbol_after_digits) {
    pattern += symbol;
  } else {
    pattern = symbol + pattern;
  }

  if (options.allow_negatives) {
    if (options.parens_for_negatives) {
      pattern = '(\\(' + pattern + '\\)|' + pattern + ')';
    } else if (!(options.negative_sign_before_digits || options.negative_sign_after_digits)) {
      pattern = negative + pattern;
    }
  }

  // ensure there's a dollar and/or decimal amount, and that
  // it doesn't start with a space or a negative sign followed by a space
  return new RegExp('^(?!-? )(?=.*\\d)' + pattern + '$');
}

var default_currency_options = {
  symbol: '$',
  require_symbol: false,
  allow_space_after_symbol: false,
  symbol_after_digits: false,
  allow_negatives: true,
  parens_for_negatives: false,
  negative_sign_before_digits: false,
  negative_sign_after_digits: false,
  allow_negative_sign_placeholder: false,
  thousands_separator: ',',
  decimal_separator: '.',
  allow_decimal: true,
  require_decimal: false,
  digits_after_decimal: [2],
  allow_space_after_digits: false
};

function isCurrency(str, options) {
  (0, _assertString2.default)(str);
  options = (0, _merge2.default)(options, default_currency_options);
  return currencyRegex(options).test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177,"./util/merge":178}],126:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isDataURI;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var dataURI = /^\s*data:([a-z]+\/[a-z0-9\-\+]+(;[a-z\-]+=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9!\$&',\(\)\*\+,;=\-\._~:@\/\?%\s]*\s*$/i; // eslint-disable-line max-len

function isDataURI(str) {
  (0, _assertString2.default)(str);
  return dataURI.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],127:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isDecimal;

var _merge = require('./util/merge');

var _merge2 = _interopRequireDefault(_merge);

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _alpha = require('./alpha');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function decimalRegExp(options) {
  var regExp = new RegExp('^[-+]?([0-9]+)?(\\' + _alpha.decimal[options.locale] + '[0-9]{' + options.decimal_digits + '})' + (options.force_decimal ? '' : '?') + '$');
  return regExp;
}

var default_decimal_options = {
  force_decimal: false,
  decimal_digits: '1,',
  locale: 'en-US'
};

var blacklist = ['', '-', '+'];

function isDecimal(str, options) {
  (0, _assertString2.default)(str);
  options = (0, _merge2.default)(options, default_decimal_options);
  if (options.locale in _alpha.decimal) {
    return !blacklist.includes(str.replace(/ /g, '')) && decimalRegExp(options).test(str);
  }
  throw new Error('Invalid locale \'' + options.locale + '\'');
}
module.exports = exports['default'];
},{"./alpha":111,"./util/assertString":177,"./util/merge":178}],128:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isDivisibleBy;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _toFloat = require('./toFloat');

var _toFloat2 = _interopRequireDefault(_toFloat);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isDivisibleBy(str, num) {
  (0, _assertString2.default)(str);
  return (0, _toFloat2.default)(str) % parseInt(num, 10) === 0;
}
module.exports = exports['default'];
},{"./toFloat":173,"./util/assertString":177}],129:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isEmail;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _merge = require('./util/merge');

var _merge2 = _interopRequireDefault(_merge);

var _isByteLength = require('./isByteLength');

var _isByteLength2 = _interopRequireDefault(_isByteLength);

var _isFQDN = require('./isFQDN');

var _isFQDN2 = _interopRequireDefault(_isFQDN);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var default_email_options = {
  allow_display_name: false,
  require_display_name: false,
  allow_utf8_local_part: true,
  require_tld: true
};

/* eslint-disable max-len */
/* eslint-disable no-control-regex */
var displayName = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\.\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\,\.\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF\s]*<(.+)>$/i;
var emailUserPart = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~]+$/i;
var quotedEmailUser = /^([\s\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e]|(\\[\x01-\x09\x0b\x0c\x0d-\x7f]))*$/i;
var emailUserUtf8Part = /^[a-z\d!#\$%&'\*\+\-\/=\?\^_`{\|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+$/i;
var quotedEmailUserUtf8 = /^([\s\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|(\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*$/i;
/* eslint-enable max-len */
/* eslint-enable no-control-regex */

function isEmail(str, options) {
  (0, _assertString2.default)(str);
  options = (0, _merge2.default)(options, default_email_options);

  if (options.require_display_name || options.allow_display_name) {
    var display_email = str.match(displayName);
    if (display_email) {
      str = display_email[1];
    } else if (options.require_display_name) {
      return false;
    }
  }

  var parts = str.split('@');
  var domain = parts.pop();
  var user = parts.join('@');

  var lower_domain = domain.toLowerCase();
  if (lower_domain === 'gmail.com' || lower_domain === 'googlemail.com') {
    user = user.replace(/\./g, '').toLowerCase();
  }

  if (!(0, _isByteLength2.default)(user, { max: 64 }) || !(0, _isByteLength2.default)(domain, { max: 254 })) {
    return false;
  }

  if (!(0, _isFQDN2.default)(domain, { require_tld: options.require_tld })) {
    return false;
  }

  if (user[0] === '"') {
    user = user.slice(1, user.length - 1);
    return options.allow_utf8_local_part ? quotedEmailUserUtf8.test(user) : quotedEmailUser.test(user);
  }

  var pattern = options.allow_utf8_local_part ? emailUserUtf8Part : emailUserPart;

  var user_parts = user.split('.');
  for (var i = 0; i < user_parts.length; i++) {
    if (!pattern.test(user_parts[i])) {
      return false;
    }
  }

  return true;
}
module.exports = exports['default'];
},{"./isByteLength":123,"./isFQDN":131,"./util/assertString":177,"./util/merge":178}],130:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isEmpty;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isEmpty(str) {
  (0, _assertString2.default)(str);
  return str.length === 0;
}
module.exports = exports['default'];
},{"./util/assertString":177}],131:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isFQDN;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _merge = require('./util/merge');

var _merge2 = _interopRequireDefault(_merge);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var default_fqdn_options = {
  require_tld: true,
  allow_underscores: false,
  allow_trailing_dot: false
};

function isFQDN(str, options) {
  (0, _assertString2.default)(str);
  options = (0, _merge2.default)(options, default_fqdn_options);

  /* Remove the optional trailing dot before checking validity */
  if (options.allow_trailing_dot && str[str.length - 1] === '.') {
    str = str.substring(0, str.length - 1);
  }
  var parts = str.split('.');
  if (options.require_tld) {
    var tld = parts.pop();
    if (!parts.length || !/^([a-z\u00a1-\uffff]{2,}|xn[a-z0-9-]{2,})$/i.test(tld)) {
      return false;
    }
    // disallow spaces
    if (/[\s\u2002-\u200B\u202F\u205F\u3000\uFEFF\uDB40\uDC20]/.test(tld)) {
      return false;
    }
  }
  for (var part, i = 0; i < parts.length; i++) {
    part = parts[i];
    if (options.allow_underscores) {
      part = part.replace(/_/g, '');
    }
    if (!/^[a-z\u00a1-\uffff0-9-]+$/i.test(part)) {
      return false;
    }
    // disallow full-width chars
    if (/[\uff01-\uff5e]/.test(part)) {
      return false;
    }
    if (part[0] === '-' || part[part.length - 1] === '-') {
      return false;
    }
  }
  return true;
}
module.exports = exports['default'];
},{"./util/assertString":177,"./util/merge":178}],132:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isFloat;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _alpha = require('./alpha');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isFloat(str, options) {
  (0, _assertString2.default)(str);
  options = options || {};
  var float = new RegExp('^(?:[-+])?(?:[0-9]+)?(?:\\' + (options.locale ? _alpha.decimal[options.locale] : '.') + '[0-9]*)?(?:[eE][\\+\\-]?(?:[0-9]+))?$');
  if (str === '' || str === '.' || str === '-' || str === '+') {
    return false;
  }
  return float.test(str) && (!options.hasOwnProperty('min') || str >= options.min) && (!options.hasOwnProperty('max') || str <= options.max) && (!options.hasOwnProperty('lt') || str < options.lt) && (!options.hasOwnProperty('gt') || str > options.gt);
}
module.exports = exports['default'];
},{"./alpha":111,"./util/assertString":177}],133:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.fullWidth = undefined;
exports.default = isFullWidth;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var fullWidth = exports.fullWidth = /[^\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/;

function isFullWidth(str) {
  (0, _assertString2.default)(str);
  return fullWidth.test(str);
}
},{"./util/assertString":177}],134:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.halfWidth = undefined;
exports.default = isHalfWidth;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var halfWidth = exports.halfWidth = /[\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/;

function isHalfWidth(str) {
  (0, _assertString2.default)(str);
  return halfWidth.test(str);
}
},{"./util/assertString":177}],135:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isHash;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var lengths = {
  md5: 32,
  md4: 32,
  sha1: 40,
  sha256: 64,
  sha384: 96,
  sha512: 128,
  ripemd128: 32,
  ripemd160: 40,
  tiger128: 32,
  tiger160: 40,
  tiger192: 48,
  crc32: 8,
  crc32b: 8
};

function isHash(str, algorithm) {
  (0, _assertString2.default)(str);
  var hash = new RegExp('^[a-f0-9]{' + lengths[algorithm] + '}$');
  return hash.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],136:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isHexColor;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var hexcolor = /^#?([0-9A-F]{3}|[0-9A-F]{6})$/i;

function isHexColor(str) {
  (0, _assertString2.default)(str);
  return hexcolor.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],137:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isHexadecimal;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var hexadecimal = /^[0-9A-F]+$/i;

function isHexadecimal(str) {
  (0, _assertString2.default)(str);
  return hexadecimal.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],138:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isIP;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var ipv4Maybe = /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
var ipv6Block = /^[0-9A-F]{1,4}$/i;

function isIP(str) {
  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';

  (0, _assertString2.default)(str);
  version = String(version);
  if (!version) {
    return isIP(str, 4) || isIP(str, 6);
  } else if (version === '4') {
    if (!ipv4Maybe.test(str)) {
      return false;
    }
    var parts = str.split('.').sort(function (a, b) {
      return a - b;
    });
    return parts[3] <= 255;
  } else if (version === '6') {
    var blocks = str.split(':');
    var foundOmissionBlock = false; // marker to indicate ::

    // At least some OS accept the last 32 bits of an IPv6 address
    // (i.e. 2 of the blocks) in IPv4 notation, and RFC 3493 says
    // that '::ffff:a.b.c.d' is valid for IPv4-mapped IPv6 addresses,
    // and '::a.b.c.d' is deprecated, but also valid.
    var foundIPv4TransitionBlock = isIP(blocks[blocks.length - 1], 4);
    var expectedNumberOfBlocks = foundIPv4TransitionBlock ? 7 : 8;

    if (blocks.length > expectedNumberOfBlocks) {
      return false;
    }
    // initial or final ::
    if (str === '::') {
      return true;
    } else if (str.substr(0, 2) === '::') {
      blocks.shift();
      blocks.shift();
      foundOmissionBlock = true;
    } else if (str.substr(str.length - 2) === '::') {
      blocks.pop();
      blocks.pop();
      foundOmissionBlock = true;
    }

    for (var i = 0; i < blocks.length; ++i) {
      // test for a :: which can not be at the string start/end
      // since those cases have been handled above
      if (blocks[i] === '' && i > 0 && i < blocks.length - 1) {
        if (foundOmissionBlock) {
          return false; // multiple :: in address
        }
        foundOmissionBlock = true;
      } else if (foundIPv4TransitionBlock && i === blocks.length - 1) {
        // it has been checked before that the last
        // block is a valid IPv4 address
      } else if (!ipv6Block.test(blocks[i])) {
        return false;
      }
    }
    if (foundOmissionBlock) {
      return blocks.length >= 1;
    }
    return blocks.length === expectedNumberOfBlocks;
  }
  return false;
}
module.exports = exports['default'];
},{"./util/assertString":177}],139:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isISBN;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var isbn10Maybe = /^(?:[0-9]{9}X|[0-9]{10})$/;
var isbn13Maybe = /^(?:[0-9]{13})$/;
var factor = [1, 3];

function isISBN(str) {
  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';

  (0, _assertString2.default)(str);
  version = String(version);
  if (!version) {
    return isISBN(str, 10) || isISBN(str, 13);
  }
  var sanitized = str.replace(/[\s-]+/g, '');
  var checksum = 0;
  var i = void 0;
  if (version === '10') {
    if (!isbn10Maybe.test(sanitized)) {
      return false;
    }
    for (i = 0; i < 9; i++) {
      checksum += (i + 1) * sanitized.charAt(i);
    }
    if (sanitized.charAt(9) === 'X') {
      checksum += 10 * 10;
    } else {
      checksum += 10 * sanitized.charAt(9);
    }
    if (checksum % 11 === 0) {
      return !!sanitized;
    }
  } else if (version === '13') {
    if (!isbn13Maybe.test(sanitized)) {
      return false;
    }
    for (i = 0; i < 12; i++) {
      checksum += factor[i % 2] * sanitized.charAt(i);
    }
    if (sanitized.charAt(12) - (10 - checksum % 10) % 10 === 0) {
      return !!sanitized;
    }
  }
  return false;
}
module.exports = exports['default'];
},{"./util/assertString":177}],140:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isISIN;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var isin = /^[A-Z]{2}[0-9A-Z]{9}[0-9]$/;

function isISIN(str) {
  (0, _assertString2.default)(str);
  if (!isin.test(str)) {
    return false;
  }

  var checksumStr = str.replace(/[A-Z]/g, function (character) {
    return parseInt(character, 36);
  });

  var sum = 0;
  var digit = void 0;
  var tmpNum = void 0;
  var shouldDouble = true;
  for (var i = checksumStr.length - 2; i >= 0; i--) {
    digit = checksumStr.substring(i, i + 1);
    tmpNum = parseInt(digit, 10);
    if (shouldDouble) {
      tmpNum *= 2;
      if (tmpNum >= 10) {
        sum += tmpNum + 1;
      } else {
        sum += tmpNum;
      }
    } else {
      sum += tmpNum;
    }
    shouldDouble = !shouldDouble;
  }

  return parseInt(str.substr(str.length - 1), 10) === (10000 - sum) % 10;
}
module.exports = exports['default'];
},{"./util/assertString":177}],141:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isISO31661Alpha2;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// from https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
var validISO31661Alpha2CountriesCodes = ['AD', 'AE', 'AF', 'AG', 'AI', 'AL', 'AM', 'AO', 'AQ', 'AR', 'AS', 'AT', 'AU', 'AW', 'AX', 'AZ', 'BA', 'BB', 'BD', 'BE', 'BF', 'BG', 'BH', 'BI', 'BJ', 'BL', 'BM', 'BN', 'BO', 'BQ', 'BR', 'BS', 'BT', 'BV', 'BW', 'BY', 'BZ', 'CA', 'CC', 'CD', 'CF', 'CG', 'CH', 'CI', 'CK', 'CL', 'CM', 'CN', 'CO', 'CR', 'CU', 'CV', 'CW', 'CX', 'CY', 'CZ', 'DE', 'DJ', 'DK', 'DM', 'DO', 'DZ', 'EC', 'EE', 'EG', 'EH', 'ER', 'ES', 'ET', 'FI', 'FJ', 'FK', 'FM', 'FO', 'FR', 'GA', 'GB', 'GD', 'GE', 'GF', 'GG', 'GH', 'GI', 'GL', 'GM', 'GN', 'GP', 'GQ', 'GR', 'GS', 'GT', 'GU', 'GW', 'GY', 'HK', 'HM', 'HN', 'HR', 'HT', 'HU', 'ID', 'IE', 'IL', 'IM', 'IN', 'IO', 'IQ', 'IR', 'IS', 'IT', 'JE', 'JM', 'JO', 'JP', 'KE', 'KG', 'KH', 'KI', 'KM', 'KN', 'KP', 'KR', 'KW', 'KY', 'KZ', 'LA', 'LB', 'LC', 'LI', 'LK', 'LR', 'LS', 'LT', 'LU', 'LV', 'LY', 'MA', 'MC', 'MD', 'ME', 'MF', 'MG', 'MH', 'MK', 'ML', 'MM', 'MN', 'MO', 'MP', 'MQ', 'MR', 'MS', 'MT', 'MU', 'MV', 'MW', 'MX', 'MY', 'MZ', 'NA', 'NC', 'NE', 'NF', 'NG', 'NI', 'NL', 'NO', 'NP', 'NR', 'NU', 'NZ', 'OM', 'PA', 'PE', 'PF', 'PG', 'PH', 'PK', 'PL', 'PM', 'PN', 'PR', 'PS', 'PT', 'PW', 'PY', 'QA', 'RE', 'RO', 'RS', 'RU', 'RW', 'SA', 'SB', 'SC', 'SD', 'SE', 'SG', 'SH', 'SI', 'SJ', 'SK', 'SL', 'SM', 'SN', 'SO', 'SR', 'SS', 'ST', 'SV', 'SX', 'SY', 'SZ', 'TC', 'TD', 'TF', 'TG', 'TH', 'TJ', 'TK', 'TL', 'TM', 'TN', 'TO', 'TR', 'TT', 'TV', 'TW', 'TZ', 'UA', 'UG', 'UM', 'US', 'UY', 'UZ', 'VA', 'VC', 'VE', 'VG', 'VI', 'VN', 'VU', 'WF', 'WS', 'YE', 'YT', 'ZA', 'ZM', 'ZW'];

function isISO31661Alpha2(str) {
  (0, _assertString2.default)(str);
  return validISO31661Alpha2CountriesCodes.includes(str.toUpperCase());
}
module.exports = exports['default'];
},{"./util/assertString":177}],142:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isISO8601;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable max-len */
// from http://goo.gl/0ejHHW
var iso8601 = /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;
/* eslint-enable max-len */

function isISO8601(str) {
  (0, _assertString2.default)(str);
  return iso8601.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],143:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isISRC;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// see http://isrc.ifpi.org/en/isrc-standard/code-syntax
var isrc = /^[A-Z]{2}[0-9A-Z]{3}\d{2}\d{5}$/;

function isISRC(str) {
  (0, _assertString2.default)(str);
  return isrc.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],144:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isISSN;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var issn = '^\\d{4}-?\\d{3}[\\dX]$';

function isISSN(str) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

  (0, _assertString2.default)(str);
  var testIssn = issn;
  testIssn = options.require_hyphen ? testIssn.replace('?', '') : testIssn;
  testIssn = options.case_sensitive ? new RegExp(testIssn) : new RegExp(testIssn, 'i');
  if (!testIssn.test(str)) {
    return false;
  }
  var issnDigits = str.replace('-', '');
  var position = 8;
  var checksum = 0;
  var _iteratorNormalCompletion = true;
  var _didIteratorError = false;
  var _iteratorError = undefined;

  try {
    for (var _iterator = issnDigits[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
      var digit = _step.value;

      var digitValue = digit.toUpperCase() === 'X' ? 10 : +digit;
      checksum += digitValue * position;
      --position;
    }
  } catch (err) {
    _didIteratorError = true;
    _iteratorError = err;
  } finally {
    try {
      if (!_iteratorNormalCompletion && _iterator.return) {
        _iterator.return();
      }
    } finally {
      if (_didIteratorError) {
        throw _iteratorError;
      }
    }
  }

  return checksum % 11 === 0;
}
module.exports = exports['default'];
},{"./util/assertString":177}],145:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.default = isIn;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _toString = require('./util/toString');

var _toString2 = _interopRequireDefault(_toString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isIn(str, options) {
  (0, _assertString2.default)(str);
  var i = void 0;
  if (Object.prototype.toString.call(options) === '[object Array]') {
    var array = [];
    for (i in options) {
      if ({}.hasOwnProperty.call(options, i)) {
        array[i] = (0, _toString2.default)(options[i]);
      }
    }
    return array.indexOf(str) >= 0;
  } else if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) === 'object') {
    return options.hasOwnProperty(str);
  } else if (options && typeof options.indexOf === 'function') {
    return options.indexOf(str) >= 0;
  }
  return false;
}
module.exports = exports['default'];
},{"./util/assertString":177,"./util/toString":179}],146:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isInt;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var int = /^(?:[-+]?(?:0|[1-9][0-9]*))$/;
var intLeadingZeroes = /^[-+]?[0-9]+$/;

function isInt(str, options) {
  (0, _assertString2.default)(str);
  options = options || {};

  // Get the regex to use for testing, based on whether
  // leading zeroes are allowed or not.
  var regex = options.hasOwnProperty('allow_leading_zeroes') && !options.allow_leading_zeroes ? int : intLeadingZeroes;

  // Check min/max/lt/gt
  var minCheckPassed = !options.hasOwnProperty('min') || str >= options.min;
  var maxCheckPassed = !options.hasOwnProperty('max') || str <= options.max;
  var ltCheckPassed = !options.hasOwnProperty('lt') || str < options.lt;
  var gtCheckPassed = !options.hasOwnProperty('gt') || str > options.gt;

  return regex.test(str) && minCheckPassed && maxCheckPassed && ltCheckPassed && gtCheckPassed;
}
module.exports = exports['default'];
},{"./util/assertString":177}],147:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.default = isJSON;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isJSON(str) {
  (0, _assertString2.default)(str);
  try {
    var obj = JSON.parse(str);
    return !!obj && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object';
  } catch (e) {/* ignore */}
  return false;
}
module.exports = exports['default'];
},{"./util/assertString":177}],148:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.default = function (str) {
  (0, _assertString2.default)(str);
  if (!str.includes(',')) return false;
  var pair = str.split(',');
  return lat.test(pair[0]) && long.test(pair[1]);
};

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var lat = /^\(?[+-]?(90(\.0+)?|[1-8]?\d(\.\d+)?)$/;
var long = /^\s?[+-]?(180(\.0+)?|1[0-7]\d(\.\d+)?|\d{1,2}(\.\d+)?)\)?$/;

module.exports = exports['default'];
},{"./util/assertString":177}],149:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.default = isLength;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable prefer-rest-params */
function isLength(str, options) {
  (0, _assertString2.default)(str);
  var min = void 0;
  var max = void 0;
  if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) === 'object') {
    min = options.min || 0;
    max = options.max;
  } else {
    // backwards compatibility: isLength(str, min [, max])
    min = arguments[1];
    max = arguments[2];
  }
  var surrogatePairs = str.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g) || [];
  var len = str.length - surrogatePairs.length;
  return len >= min && (typeof max === 'undefined' || len <= max);
}
module.exports = exports['default'];
},{"./util/assertString":177}],150:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isLowercase;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isLowercase(str) {
  (0, _assertString2.default)(str);
  return str === str.toLowerCase();
}
module.exports = exports['default'];
},{"./util/assertString":177}],151:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isMACAddress;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var macAddress = /^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$/;

function isMACAddress(str) {
  (0, _assertString2.default)(str);
  return macAddress.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],152:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isMD5;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var md5 = /^[a-f0-9]{32}$/;

function isMD5(str) {
  (0, _assertString2.default)(str);
  return md5.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],153:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isMimeType;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/*
  Checks if the provided string matches to a correct Media type format (MIME type)

  This function only checks is the string format follows the
  etablished rules by the according RFC specifications.
  This function supports 'charset' in textual media types
  (https://tools.ietf.org/html/rfc6657).

  This function does not check against all the media types listed
  by the IANA (https://www.iana.org/assignments/media-types/media-types.xhtml)
  because of lightness purposes : it would require to include
  all these MIME types in this librairy, which would weigh it
  significantly. This kind of effort maybe is not worth for the use that
  this function has in this entire librairy.

  More informations in the RFC specifications :
  - https://tools.ietf.org/html/rfc2045
  - https://tools.ietf.org/html/rfc2046
  - https://tools.ietf.org/html/rfc7231#section-3.1.1.1
  - https://tools.ietf.org/html/rfc7231#section-3.1.1.5
*/

// Match simple MIME types
// NB :
//   Subtype length must not exceed 100 characters.
//   This rule does not comply to the RFC specs (what is the max length ?).
var mimeTypeSimple = /^(application|audio|font|image|message|model|multipart|text|video)\/[a-zA-Z0-9\.\-\+]{1,100}$/i; // eslint-disable-line max-len

// Handle "charset" in "text/*"
var mimeTypeText = /^text\/[a-zA-Z0-9\.\-\+]{1,100};\s?charset=("[a-zA-Z0-9\.\-\+\s]{0,70}"|[a-zA-Z0-9\.\-\+]{0,70})(\s?\([a-zA-Z0-9\.\-\+\s]{1,20}\))?$/i; // eslint-disable-line max-len

// Handle "boundary" in "multipart/*"
var mimeTypeMultipart = /^multipart\/[a-zA-Z0-9\.\-\+]{1,100}(;\s?(boundary|charset)=("[a-zA-Z0-9\.\-\+\s]{0,70}"|[a-zA-Z0-9\.\-\+]{0,70})(\s?\([a-zA-Z0-9\.\-\+\s]{1,20}\))?){0,2}$/i; // eslint-disable-line max-len

function isMimeType(str) {
  (0, _assertString2.default)(str);
  return mimeTypeSimple.test(str) || mimeTypeText.test(str) || mimeTypeMultipart.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],154:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isMobilePhone;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable max-len */
var phones = {
  'ar-AE': /^((\+?971)|0)?5[024568]\d{7}$/,
  'ar-DZ': /^(\+?213|0)(5|6|7)\d{8}$/,
  'ar-EG': /^((\+?20)|0)?1[012]\d{8}$/,
  'ar-JO': /^(\+?962|0)?7[789]\d{7}$/,
  'ar-SA': /^(!?(\+?966)|0)?5\d{8}$/,
  'ar-SY': /^(!?(\+?963)|0)?9\d{8}$/,
  'cs-CZ': /^(\+?420)? ?[1-9][0-9]{2} ?[0-9]{3} ?[0-9]{3}$/,
  'da-DK': /^(\+?45)?\s?\d{2}\s?\d{2}\s?\d{2}\s?\d{2}$/,
  'de-DE': /^(\+?49[ \.\-])?([\(]{1}[0-9]{1,6}[\)])?([0-9 \.\-\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/,
  'el-GR': /^(\+?30|0)?(69\d{8})$/,
  'en-AU': /^(\+?61|0)4\d{8}$/,
  'en-GB': /^(\+?44|0)7\d{9}$/,
  'en-HK': /^(\+?852\-?)?[456789]\d{3}\-?\d{4}$/,
  'en-IN': /^(\+?91|0)?[789]\d{9}$/,
  'en-KE': /^(\+?254|0)?[7]\d{8}$/,
  'en-NG': /^(\+?234|0)?[789]\d{9}$/,
  'en-NZ': /^(\+?64|0)2\d{7,9}$/,
  'en-PK': /^((\+92)|(0092))-{0,1}\d{3}-{0,1}\d{7}$|^\d{11}$|^\d{4}-\d{7}$/,
  'en-RW': /^(\+?250|0)?[7]\d{8}$/,
  'en-SG': /^(\+65)?[89]\d{7}$/,
  'en-TZ': /^(\+?255|0)?[67]\d{8}$/,
  'en-UG': /^(\+?256|0)?[7]\d{8}$/,
  'en-US': /^(\+?1)?[2-9]\d{2}[2-9](?!11)\d{6}$/,
  'en-ZA': /^(\+?27|0)\d{9}$/,
  'en-ZM': /^(\+?26)?09[567]\d{7}$/,
  'es-ES': /^(\+?34)?(6\d{1}|7[1234])\d{7}$/,
  'et-EE': /^(\+?372)?\s?(5|8[1-4])\s?([0-9]\s?){6,7}$/,
  'fa-IR': /^(\+?98[\-\s]?|0)9[0-39]\d[\-\s]?\d{3}[\-\s]?\d{4}$/,
  'fi-FI': /^(\+?358|0)\s?(4(0|1|2|4|5|6)?|50)\s?(\d\s?){4,8}\d$/,
  'fo-FO': /^(\+?298)?\s?\d{2}\s?\d{2}\s?\d{2}$/,
  'fr-FR': /^(\+?33|0)[67]\d{8}$/,
  'he-IL': /^(\+972|0)([23489]|5[0248]|77)[1-9]\d{6}/,
  'hu-HU': /^(\+?36)(20|30|70)\d{7}$/,
  'id-ID': /^(\+?62|0[1-9])[\s|\d]+$/,
  'it-IT': /^(\+?39)?\s?3\d{2} ?\d{6,7}$/,
  'ja-JP': /^(\+?81|0)[789]0[ \-]?[1-9]\d{2}[ \-]?\d{5}$/,
  'kl-GL': /^(\+?299)?\s?\d{2}\s?\d{2}\s?\d{2}$/,
  'ko-KR': /^((\+?82)[ \-]?)?0?1([0|1|6|7|8|9]{1})[ \-]?\d{3,4}[ \-]?\d{4}$/,
  'lt-LT': /^(\+370|8)\d{8}$/,
  'ms-MY': /^(\+?6?01){1}(([145]{1}(\-|\s)?\d{7,8})|([236789]{1}(\s|\-)?\d{7}))$/,
  'nb-NO': /^(\+?47)?[49]\d{7}$/,
  'nl-BE': /^(\+?32|0)4?\d{8}$/,
  'nn-NO': /^(\+?47)?[49]\d{7}$/,
  'pl-PL': /^(\+?48)? ?[5-8]\d ?\d{3} ?\d{2} ?\d{2}$/,
  'pt-BR': /^(\+?55|0)\-?[1-9]{2}\-?[2-9]{1}\d{3,4}\-?\d{4}$/,
  'pt-PT': /^(\+?351)?9[1236]\d{7}$/,
  'ro-RO': /^(\+?4?0)\s?7\d{2}(\/|\s|\.|\-)?\d{3}(\s|\.|\-)?\d{3}$/,
  'ru-RU': /^(\+?7|8)?9\d{9}$/,
  'sk-SK': /^(\+?421)? ?[1-9][0-9]{2} ?[0-9]{3} ?[0-9]{3}$/,
  'sr-RS': /^(\+3816|06)[- \d]{5,9}$/,
  'tr-TR': /^(\+?90|0)?5\d{9}$/,
  'uk-UA': /^(\+?38|8)?0\d{9}$/,
  'vi-VN': /^(\+?84|0)?((1(2([0-9])|6([2-9])|88|99))|(9((?!5)[0-9])))([0-9]{7})$/,
  'zh-CN': /^(\+?0?86\-?)?1[345789]\d{9}$/,
  'zh-TW': /^(\+?886\-?|0)?9\d{8}$/
};
/* eslint-enable max-len */

// aliases
phones['en-CA'] = phones['en-US'];
phones['fr-BE'] = phones['nl-BE'];
phones['zh-HK'] = phones['en-HK'];

function isMobilePhone(str, locale) {
  (0, _assertString2.default)(str);
  if (locale in phones) {
    return phones[locale].test(str);
  } else if (locale === 'any') {
    for (var key in phones) {
      if (phones.hasOwnProperty(key)) {
        var phone = phones[key];
        if (phone.test(str)) {
          return true;
        }
      }
    }
    return false;
  }
  throw new Error('Invalid locale \'' + locale + '\'');
}
module.exports = exports['default'];
},{"./util/assertString":177}],155:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isMongoId;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _isHexadecimal = require('./isHexadecimal');

var _isHexadecimal2 = _interopRequireDefault(_isHexadecimal);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isMongoId(str) {
  (0, _assertString2.default)(str);
  return (0, _isHexadecimal2.default)(str) && str.length === 24;
}
module.exports = exports['default'];
},{"./isHexadecimal":137,"./util/assertString":177}],156:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isMultibyte;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/* eslint-disable no-control-regex */
var multibyte = /[^\x00-\x7F]/;
/* eslint-enable no-control-regex */

function isMultibyte(str) {
  (0, _assertString2.default)(str);
  return multibyte.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],157:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isNumeric;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var numeric = /^[-+]?[0-9]+$/;

function isNumeric(str) {
  (0, _assertString2.default)(str);
  return numeric.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],158:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isPort;

var _isInt = require('./isInt');

var _isInt2 = _interopRequireDefault(_isInt);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isPort(str) {
  return (0, _isInt2.default)(str, { min: 0, max: 65535 });
}
module.exports = exports['default'];
},{"./isInt":146}],159:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.locales = undefined;

exports.default = function (str, locale) {
  (0, _assertString2.default)(str);
  if (locale in patterns) {
    return patterns[locale].test(str);
  } else if (locale === 'any') {
    for (var key in patterns) {
      if (patterns.hasOwnProperty(key)) {
        var pattern = patterns[key];
        if (pattern.test(str)) {
          return true;
        }
      }
    }
    return false;
  }
  throw new Error('Invalid locale \'' + locale + '\'');
};

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// common patterns
var threeDigit = /^\d{3}$/;
var fourDigit = /^\d{4}$/;
var fiveDigit = /^\d{5}$/;
var sixDigit = /^\d{6}$/;

var patterns = {
  AT: fourDigit,
  AU: fourDigit,
  BE: fourDigit,
  CA: /^[ABCEGHJKLMNPRSTVXY]\d[ABCEGHJ-NPRSTV-Z][\s\-]?\d[ABCEGHJ-NPRSTV-Z]\d$/i,
  CH: fourDigit,
  CZ: /^\d{3}\s?\d{2}$/,
  DE: fiveDigit,
  DK: fourDigit,
  DZ: fiveDigit,
  ES: fiveDigit,
  FI: fiveDigit,
  FR: /^\d{2}\s?\d{3}$/,
  GB: /^(gir\s?0aa|[a-z]{1,2}\d[\da-z]?\s?(\d[a-z]{2})?)$/i,
  GR: /^\d{3}\s?\d{2}$/,
  IL: fiveDigit,
  IN: sixDigit,
  IS: threeDigit,
  IT: fiveDigit,
  JP: /^\d{3}\-\d{4}$/,
  KE: fiveDigit,
  LI: /^(948[5-9]|949[0-7])$/,
  MX: fiveDigit,
  NL: /^\d{4}\s?[a-z]{2}$/i,
  NO: fourDigit,
  PL: /^\d{2}\-\d{3}$/,
  PT: /^\d{4}\-\d{3}?$/,
  RO: sixDigit,
  RU: sixDigit,
  SA: fiveDigit,
  SE: /^\d{3}\s?\d{2}$/,
  TW: /^\d{3}(\d{2})?$/,
  US: /^\d{5}(-\d{4})?$/,
  ZA: fourDigit,
  ZM: fiveDigit
};

var locales = exports.locales = Object.keys(patterns);
},{"./util/assertString":177}],160:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isSurrogatePair;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var surrogatePair = /[\uD800-\uDBFF][\uDC00-\uDFFF]/;

function isSurrogatePair(str) {
  (0, _assertString2.default)(str);
  return surrogatePair.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],161:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isURL;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _isFQDN = require('./isFQDN');

var _isFQDN2 = _interopRequireDefault(_isFQDN);

var _isIP = require('./isIP');

var _isIP2 = _interopRequireDefault(_isIP);

var _merge = require('./util/merge');

var _merge2 = _interopRequireDefault(_merge);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var default_url_options = {
  protocols: ['http', 'https', 'ftp'],
  require_tld: true,
  require_protocol: false,
  require_host: true,
  require_valid_protocol: true,
  allow_underscores: false,
  allow_trailing_dot: false,
  allow_protocol_relative_urls: false
};

var wrapped_ipv6 = /^\[([^\]]+)\](?::([0-9]+))?$/;

function isRegExp(obj) {
  return Object.prototype.toString.call(obj) === '[object RegExp]';
}

function checkHost(host, matches) {
  for (var i = 0; i < matches.length; i++) {
    var match = matches[i];
    if (host === match || isRegExp(match) && match.test(host)) {
      return true;
    }
  }
  return false;
}

function isURL(url, options) {
  (0, _assertString2.default)(url);
  if (!url || url.length >= 2083 || /[\s<>]/.test(url)) {
    return false;
  }
  if (url.indexOf('mailto:') === 0) {
    return false;
  }
  options = (0, _merge2.default)(options, default_url_options);
  var protocol = void 0,
      auth = void 0,
      host = void 0,
      hostname = void 0,
      port = void 0,
      port_str = void 0,
      split = void 0,
      ipv6 = void 0;

  split = url.split('#');
  url = split.shift();

  split = url.split('?');
  url = split.shift();

  split = url.split('://');
  if (split.length > 1) {
    protocol = split.shift();
    if (options.require_valid_protocol && options.protocols.indexOf(protocol) === -1) {
      return false;
    }
  } else if (options.require_protocol) {
    return false;
  } else if (options.allow_protocol_relative_urls && url.substr(0, 2) === '//') {
    split[0] = url.substr(2);
  }
  url = split.join('://');

  if (url === '') {
    return false;
  }

  split = url.split('/');
  url = split.shift();

  if (url === '' && !options.require_host) {
    return true;
  }

  split = url.split('@');
  if (split.length > 1) {
    auth = split.shift();
    if (auth.indexOf(':') >= 0 && auth.split(':').length > 2) {
      return false;
    }
  }
  hostname = split.join('@');

  port_str = null;
  ipv6 = null;
  var ipv6_match = hostname.match(wrapped_ipv6);
  if (ipv6_match) {
    host = '';
    ipv6 = ipv6_match[1];
    port_str = ipv6_match[2] || null;
  } else {
    split = hostname.split(':');
    host = split.shift();
    if (split.length) {
      port_str = split.join(':');
    }
  }

  if (port_str !== null) {
    port = parseInt(port_str, 10);
    if (!/^[0-9]+$/.test(port_str) || port <= 0 || port > 65535) {
      return false;
    }
  }

  if (!(0, _isIP2.default)(host) && !(0, _isFQDN2.default)(host, options) && (!ipv6 || !(0, _isIP2.default)(ipv6, 6))) {
    return false;
  }

  host = host || ipv6;

  if (options.host_whitelist && !checkHost(host, options.host_whitelist)) {
    return false;
  }
  if (options.host_blacklist && checkHost(host, options.host_blacklist)) {
    return false;
  }

  return true;
}
module.exports = exports['default'];
},{"./isFQDN":131,"./isIP":138,"./util/assertString":177,"./util/merge":178}],162:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isUUID;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var uuid = {
  3: /^[0-9A-F]{8}-[0-9A-F]{4}-3[0-9A-F]{3}-[0-9A-F]{4}-[0-9A-F]{12}$/i,
  4: /^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i,
  5: /^[0-9A-F]{8}-[0-9A-F]{4}-5[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i,
  all: /^[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$/i
};

function isUUID(str) {
  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'all';

  (0, _assertString2.default)(str);
  var pattern = uuid[version];
  return pattern && pattern.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],163:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isUppercase;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isUppercase(str) {
  (0, _assertString2.default)(str);
  return str === str.toUpperCase();
}
module.exports = exports['default'];
},{"./util/assertString":177}],164:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isVariableWidth;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _isFullWidth = require('./isFullWidth');

var _isHalfWidth = require('./isHalfWidth');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isVariableWidth(str) {
  (0, _assertString2.default)(str);
  return _isFullWidth.fullWidth.test(str) && _isHalfWidth.halfWidth.test(str);
}
module.exports = exports['default'];
},{"./isFullWidth":133,"./isHalfWidth":134,"./util/assertString":177}],165:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isWhitelisted;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function isWhitelisted(str, chars) {
  (0, _assertString2.default)(str);
  for (var i = str.length - 1; i >= 0; i--) {
    if (chars.indexOf(str[i]) === -1) {
      return false;
    }
  }
  return true;
}
module.exports = exports['default'];
},{"./util/assertString":177}],166:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = ltrim;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function ltrim(str, chars) {
  (0, _assertString2.default)(str);
  var pattern = chars ? new RegExp('^[' + chars + ']+', 'g') : /^\s+/g;
  return str.replace(pattern, '');
}
module.exports = exports['default'];
},{"./util/assertString":177}],167:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = matches;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function matches(str, pattern, modifiers) {
  (0, _assertString2.default)(str);
  if (Object.prototype.toString.call(pattern) !== '[object RegExp]') {
    pattern = new RegExp(pattern, modifiers);
  }
  return pattern.test(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],168:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = normalizeEmail;

var _merge = require('./util/merge');

var _merge2 = _interopRequireDefault(_merge);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var default_normalize_email_options = {
  // The following options apply to all email addresses
  // Lowercases the local part of the email address.
  // Please note this may violate RFC 5321 as per http://stackoverflow.com/a/9808332/192024).
  // The domain is always lowercased, as per RFC 1035
  all_lowercase: true,

  // The following conversions are specific to GMail
  // Lowercases the local part of the GMail address (known to be case-insensitive)
  gmail_lowercase: true,
  // Removes dots from the local part of the email address, as that's ignored by GMail
  gmail_remove_dots: true,
  // Removes the subaddress (e.g. "+foo") from the email address
  gmail_remove_subaddress: true,
  // Conversts the googlemail.com domain to gmail.com
  gmail_convert_googlemaildotcom: true,

  // The following conversions are specific to Outlook.com / Windows Live / Hotmail
  // Lowercases the local part of the Outlook.com address (known to be case-insensitive)
  outlookdotcom_lowercase: true,
  // Removes the subaddress (e.g. "+foo") from the email address
  outlookdotcom_remove_subaddress: true,

  // The following conversions are specific to Yahoo
  // Lowercases the local part of the Yahoo address (known to be case-insensitive)
  yahoo_lowercase: true,
  // Removes the subaddress (e.g. "-foo") from the email address
  yahoo_remove_subaddress: true,

  // The following conversions are specific to iCloud
  // Lowercases the local part of the iCloud address (known to be case-insensitive)
  icloud_lowercase: true,
  // Removes the subaddress (e.g. "+foo") from the email address
  icloud_remove_subaddress: true
};

// List of domains used by iCloud
var icloud_domains = ['icloud.com', 'me.com'];

// List of domains used by Outlook.com and its predecessors
// This list is likely incomplete.
// Partial reference:
// https://blogs.office.com/2013/04/17/outlook-com-gets-two-step-verification-sign-in-by-alias-and-new-international-domains/
var outlookdotcom_domains = ['hotmail.at', 'hotmail.be', 'hotmail.ca', 'hotmail.cl', 'hotmail.co.il', 'hotmail.co.nz', 'hotmail.co.th', 'hotmail.co.uk', 'hotmail.com', 'hotmail.com.ar', 'hotmail.com.au', 'hotmail.com.br', 'hotmail.com.gr', 'hotmail.com.mx', 'hotmail.com.pe', 'hotmail.com.tr', 'hotmail.com.vn', 'hotmail.cz', 'hotmail.de', 'hotmail.dk', 'hotmail.es', 'hotmail.fr', 'hotmail.hu', 'hotmail.id', 'hotmail.ie', 'hotmail.in', 'hotmail.it', 'hotmail.jp', 'hotmail.kr', 'hotmail.lv', 'hotmail.my', 'hotmail.ph', 'hotmail.pt', 'hotmail.sa', 'hotmail.sg', 'hotmail.sk', 'live.be', 'live.co.uk', 'live.com', 'live.com.ar', 'live.com.mx', 'live.de', 'live.es', 'live.eu', 'live.fr', 'live.it', 'live.nl', 'msn.com', 'outlook.at', 'outlook.be', 'outlook.cl', 'outlook.co.il', 'outlook.co.nz', 'outlook.co.th', 'outlook.com', 'outlook.com.ar', 'outlook.com.au', 'outlook.com.br', 'outlook.com.gr', 'outlook.com.pe', 'outlook.com.tr', 'outlook.com.vn', 'outlook.cz', 'outlook.de', 'outlook.dk', 'outlook.es', 'outlook.fr', 'outlook.hu', 'outlook.id', 'outlook.ie', 'outlook.in', 'outlook.it', 'outlook.jp', 'outlook.kr', 'outlook.lv', 'outlook.my', 'outlook.ph', 'outlook.pt', 'outlook.sa', 'outlook.sg', 'outlook.sk', 'passport.com'];

// List of domains used by Yahoo Mail
// This list is likely incomplete
var yahoo_domains = ['rocketmail.com', 'yahoo.ca', 'yahoo.co.uk', 'yahoo.com', 'yahoo.de', 'yahoo.fr', 'yahoo.in', 'yahoo.it', 'ymail.com'];

function normalizeEmail(email, options) {
  options = (0, _merge2.default)(options, default_normalize_email_options);

  var raw_parts = email.split('@');
  var domain = raw_parts.pop();
  var user = raw_parts.join('@');
  var parts = [user, domain];

  // The domain is always lowercased, as it's case-insensitive per RFC 1035
  parts[1] = parts[1].toLowerCase();

  if (parts[1] === 'gmail.com' || parts[1] === 'googlemail.com') {
    // Address is GMail
    if (options.gmail_remove_subaddress) {
      parts[0] = parts[0].split('+')[0];
    }
    if (options.gmail_remove_dots) {
      parts[0] = parts[0].replace(/\./g, '');
    }
    if (!parts[0].length) {
      return false;
    }
    if (options.all_lowercase || options.gmail_lowercase) {
      parts[0] = parts[0].toLowerCase();
    }
    parts[1] = options.gmail_convert_googlemaildotcom ? 'gmail.com' : parts[1];
  } else if (~icloud_domains.indexOf(parts[1])) {
    // Address is iCloud
    if (options.icloud_remove_subaddress) {
      parts[0] = parts[0].split('+')[0];
    }
    if (!parts[0].length) {
      return false;
    }
    if (options.all_lowercase || options.icloud_lowercase) {
      parts[0] = parts[0].toLowerCase();
    }
  } else if (~outlookdotcom_domains.indexOf(parts[1])) {
    // Address is Outlook.com
    if (options.outlookdotcom_remove_subaddress) {
      parts[0] = parts[0].split('+')[0];
    }
    if (!parts[0].length) {
      return false;
    }
    if (options.all_lowercase || options.outlookdotcom_lowercase) {
      parts[0] = parts[0].toLowerCase();
    }
  } else if (~yahoo_domains.indexOf(parts[1])) {
    // Address is Yahoo
    if (options.yahoo_remove_subaddress) {
      var components = parts[0].split('-');
      parts[0] = components.length > 1 ? components.slice(0, -1).join('-') : components[0];
    }
    if (!parts[0].length) {
      return false;
    }
    if (options.all_lowercase || options.yahoo_lowercase) {
      parts[0] = parts[0].toLowerCase();
    }
  } else if (options.all_lowercase) {
    // Any other address
    parts[0] = parts[0].toLowerCase();
  }
  return parts.join('@');
}
module.exports = exports['default'];
},{"./util/merge":178}],169:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = rtrim;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function rtrim(str, chars) {
  (0, _assertString2.default)(str);
  var pattern = chars ? new RegExp('[' + chars + ']') : /\s/;

  var idx = str.length - 1;
  while (idx >= 0 && pattern.test(str[idx])) {
    idx--;
  }

  return idx < str.length ? str.substr(0, idx + 1) : str;
}
module.exports = exports['default'];
},{"./util/assertString":177}],170:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = stripLow;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

var _blacklist = require('./blacklist');

var _blacklist2 = _interopRequireDefault(_blacklist);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function stripLow(str, keep_new_lines) {
  (0, _assertString2.default)(str);
  var chars = keep_new_lines ? '\\x00-\\x09\\x0B\\x0C\\x0E-\\x1F\\x7F' : '\\x00-\\x1F\\x7F';
  return (0, _blacklist2.default)(str, chars);
}
module.exports = exports['default'];
},{"./blacklist":112,"./util/assertString":177}],171:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = toBoolean;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function toBoolean(str, strict) {
  (0, _assertString2.default)(str);
  if (strict) {
    return str === '1' || str === 'true';
  }
  return str !== '0' && str !== 'false' && str !== '';
}
module.exports = exports['default'];
},{"./util/assertString":177}],172:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = toDate;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function toDate(date) {
  (0, _assertString2.default)(date);
  date = Date.parse(date);
  return !isNaN(date) ? new Date(date) : null;
}
module.exports = exports['default'];
},{"./util/assertString":177}],173:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = toFloat;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function toFloat(str) {
  (0, _assertString2.default)(str);
  return parseFloat(str);
}
module.exports = exports['default'];
},{"./util/assertString":177}],174:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = toInt;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function toInt(str, radix) {
  (0, _assertString2.default)(str);
  return parseInt(str, radix || 10);
}
module.exports = exports['default'];
},{"./util/assertString":177}],175:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = trim;

var _rtrim = require('./rtrim');

var _rtrim2 = _interopRequireDefault(_rtrim);

var _ltrim = require('./ltrim');

var _ltrim2 = _interopRequireDefault(_ltrim);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function trim(str, chars) {
  return (0, _rtrim2.default)((0, _ltrim2.default)(str, chars), chars);
}
module.exports = exports['default'];
},{"./ltrim":166,"./rtrim":169}],176:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = unescape;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function unescape(str) {
  (0, _assertString2.default)(str);
  return str.replace(/&amp;/g, '&').replace(/&quot;/g, '"').replace(/&#x27;/g, "'").replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&#x2F;/g, '/').replace(/&#x5C;/g, '\\').replace(/&#96;/g, '`');
}
module.exports = exports['default'];
},{"./util/assertString":177}],177:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = assertString;
function assertString(input) {
  var isString = typeof input === 'string' || input instanceof String;

  if (!isString) {
    throw new TypeError('This library (validator.js) validates strings only');
  }
}
module.exports = exports['default'];
},{}],178:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = merge;
function merge() {
  var obj = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  var defaults = arguments[1];

  for (var key in defaults) {
    if (typeof obj[key] === 'undefined') {
      obj[key] = defaults[key];
    }
  }
  return obj;
}
module.exports = exports['default'];
},{}],179:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.default = toString;
function toString(input) {
  if ((typeof input === 'undefined' ? 'undefined' : _typeof(input)) === 'object' && input !== null) {
    if (typeof input.toString === 'function') {
      input = input.toString();
    } else {
      input = '[object Object]';
    }
  } else if (input === null || typeof input === 'undefined' || isNaN(input) && !input.length) {
    input = '';
  }
  return String(input);
}
module.exports = exports['default'];
},{}],180:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = whitelist;

var _assertString = require('./util/assertString');

var _assertString2 = _interopRequireDefault(_assertString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function whitelist(str, chars) {
  (0, _assertString2.default)(str);
  return str.replace(new RegExp('[^' + chars + ']+', 'g'), '');
}
module.exports = exports['default'];
},{"./util/assertString":177}],181:[function(require,module,exports){
"use strict";

module.exports = {

    INVALID_TYPE:                           "Expected type {0} but found type {1}",
    INVALID_FORMAT:                         "Object didn't pass validation for format {0}: {1}",
    ENUM_MISMATCH:                          "No enum match for: {0}",
    ANY_OF_MISSING:                         "Data does not match any schemas from 'anyOf'",
    ONE_OF_MISSING:                         "Data does not match any schemas from 'oneOf'",
    ONE_OF_MULTIPLE:                        "Data is valid against more than one schema from 'oneOf'",
    NOT_PASSED:                             "Data matches schema from 'not'",

    // Array errors
    ARRAY_LENGTH_SHORT:                     "Array is too short ({0}), minimum {1}",
    ARRAY_LENGTH_LONG:                      "Array is too long ({0}), maximum {1}",
    ARRAY_UNIQUE:                           "Array items are not unique (indexes {0} and {1})",
    ARRAY_ADDITIONAL_ITEMS:                 "Additional items not allowed",

    // Numeric errors
    MULTIPLE_OF:                            "Value {0} is not a multiple of {1}",
    MINIMUM:                                "Value {0} is less than minimum {1}",
    MINIMUM_EXCLUSIVE:                      "Value {0} is equal or less than exclusive minimum {1}",
    MAXIMUM:                                "Value {0} is greater than maximum {1}",
    MAXIMUM_EXCLUSIVE:                      "Value {0} is equal or greater than exclusive maximum {1}",

    // Object errors
    OBJECT_PROPERTIES_MINIMUM:              "Too few properties defined ({0}), minimum {1}",
    OBJECT_PROPERTIES_MAXIMUM:              "Too many properties defined ({0}), maximum {1}",
    OBJECT_MISSING_REQUIRED_PROPERTY:       "Missing required property: {0}",
    OBJECT_ADDITIONAL_PROPERTIES:           "Additional properties not allowed: {0}",
    OBJECT_DEPENDENCY_KEY:                  "Dependency failed - key must exist: {0} (due to key: {1})",

    // String errors
    MIN_LENGTH:                             "String is too short ({0} chars), minimum {1}",
    MAX_LENGTH:                             "String is too long ({0} chars), maximum {1}",
    PATTERN:                                "String does not match pattern {0}: {1}",

    // Schema validation errors
    KEYWORD_TYPE_EXPECTED:                  "Keyword '{0}' is expected to be of type '{1}'",
    KEYWORD_UNDEFINED_STRICT:               "Keyword '{0}' must be defined in strict mode",
    KEYWORD_UNEXPECTED:                     "Keyword '{0}' is not expected to appear in the schema",
    KEYWORD_MUST_BE:                        "Keyword '{0}' must be {1}",
    KEYWORD_DEPENDENCY:                     "Keyword '{0}' requires keyword '{1}'",
    KEYWORD_PATTERN:                        "Keyword '{0}' is not a valid RegExp pattern: {1}",
    KEYWORD_VALUE_TYPE:                     "Each element of keyword '{0}' array must be a '{1}'",
    UNKNOWN_FORMAT:                         "There is no validation function for format '{0}'",
    CUSTOM_MODE_FORCE_PROPERTIES:           "{0} must define at least one property if present",

    // Remote errors
    REF_UNRESOLVED:                         "Reference has not been resolved during compilation: {0}",
    UNRESOLVABLE_REFERENCE:                 "Reference could not be resolved: {0}",
    SCHEMA_NOT_REACHABLE:                   "Validator was not able to read schema with uri: {0}",
    SCHEMA_TYPE_EXPECTED:                   "Schema is expected to be of type 'object'",
    SCHEMA_NOT_AN_OBJECT:                   "Schema is not an object: {0}",
    ASYNC_TIMEOUT:                          "{0} asynchronous task(s) have timed out after {1} ms",
    PARENT_SCHEMA_VALIDATION_FAILED:        "Schema failed to validate against its parent schema, see inner errors for details.",
    REMOTE_NOT_VALID:                       "Remote reference didn't compile successfully: {0}"

};

},{}],182:[function(require,module,exports){
/*jshint maxlen: false*/

var validator = require("validator");

var FormatValidators = {
    "date": function (date) {
        if (typeof date !== "string") {
            return true;
        }
        // full-date from http://tools.ietf.org/html/rfc3339#section-5.6
        var matches = /^([0-9]{4})-([0-9]{2})-([0-9]{2})$/.exec(date);
        if (matches === null) {
            return false;
        }
        // var year = matches[1];
        // var month = matches[2];
        // var day = matches[3];
        if (matches[2] < "01" || matches[2] > "12" || matches[3] < "01" || matches[3] > "31") {
            return false;
        }
        return true;
    },
    "date-time": function (dateTime) {
        if (typeof dateTime !== "string") {
            return true;
        }
        // date-time from http://tools.ietf.org/html/rfc3339#section-5.6
        var s = dateTime.toLowerCase().split("t");
        if (!FormatValidators.date(s[0])) {
            return false;
        }
        var matches = /^([0-9]{2}):([0-9]{2}):([0-9]{2})(.[0-9]+)?(z|([+-][0-9]{2}:[0-9]{2}))$/.exec(s[1]);
        if (matches === null) {
            return false;
        }
        // var hour = matches[1];
        // var minute = matches[2];
        // var second = matches[3];
        // var fraction = matches[4];
        // var timezone = matches[5];
        if (matches[1] > "23" || matches[2] > "59" || matches[3] > "59") {
            return false;
        }
        return true;
    },
    "email": function (email) {
        if (typeof email !== "string") {
            return true;
        }
        return validator.isEmail(email, { "require_tld": true });
    },
    "hostname": function (hostname) {
        if (typeof hostname !== "string") {
            return true;
        }
        /*
            http://json-schema.org/latest/json-schema-validation.html#anchor114
            A string instance is valid against this attribute if it is a valid
            representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034].

            http://tools.ietf.org/html/rfc1034#section-3.5

            <digit> ::= any one of the ten digits 0 through 9
            var digit = /[0-9]/;

            <letter> ::= any one of the 52 alphabetic characters A through Z in upper case and a through z in lower case
            var letter = /[a-zA-Z]/;

            <let-dig> ::= <letter> | <digit>
            var letDig = /[0-9a-zA-Z]/;

            <let-dig-hyp> ::= <let-dig> | "-"
            var letDigHyp = /[-0-9a-zA-Z]/;

            <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
            var ldhStr = /[-0-9a-zA-Z]+/;

            <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
            var label = /[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?/;

            <subdomain> ::= <label> | <subdomain> "." <label>
            var subdomain = /^[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?(\.[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?)*$/;

            <domain> ::= <subdomain> | " "
            var domain = null;
        */
        var valid = /^[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?(\.[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?)*$/.test(hostname);
        if (valid) {
            // the sum of all label octets and label lengths is limited to 255.
            if (hostname.length > 255) { return false; }
            // Each node has a label, which is zero to 63 octets in length
            var labels = hostname.split(".");
            for (var i = 0; i < labels.length; i++) { if (labels[i].length > 63) { return false; } }
        }
        return valid;
    },
    "host-name": function (hostname) {
        return FormatValidators.hostname.call(this, hostname);
    },
    "ipv4": function (ipv4) {
        if (typeof ipv4 !== "string") { return true; }
        return validator.isIP(ipv4, 4);
    },
    "ipv6": function (ipv6) {
        if (typeof ipv6 !== "string") { return true; }
        return validator.isIP(ipv6, 6);
    },
    "regex": function (str) {
        try {
            RegExp(str);
            return true;
        } catch (e) {
            return false;
        }
    },
    "uri": function (uri) {
        if (this.options.strictUris) {
            return FormatValidators["strict-uri"].apply(this, arguments);
        }
        // https://github.com/zaggino/z-schema/issues/18
        // RegExp from http://tools.ietf.org/html/rfc3986#appendix-B
        return typeof uri !== "string" || RegExp("^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?").test(uri);
    },
    "strict-uri": function (uri) {
        return typeof uri !== "string" || validator.isURL(uri);
    }
};

module.exports = FormatValidators;

},{"validator":110}],183:[function(require,module,exports){
"use strict";

var FormatValidators  = require("./FormatValidators"),
    Report            = require("./Report"),
    Utils             = require("./Utils");

var JsonValidators = {
    multipleOf: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.1.2
        if (typeof json !== "number") {
            return;
        }
        if (Utils.whatIs(json / schema.multipleOf) !== "integer") {
            report.addError("MULTIPLE_OF", [json, schema.multipleOf], null, schema.description);
        }
    },
    maximum: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.2.2
        if (typeof json !== "number") {
            return;
        }
        if (schema.exclusiveMaximum !== true) {
            if (json > schema.maximum) {
                report.addError("MAXIMUM", [json, schema.maximum], null, schema.description);
            }
        } else {
            if (json >= schema.maximum) {
                report.addError("MAXIMUM_EXCLUSIVE", [json, schema.maximum], null, schema.description);
            }
        }
    },
    exclusiveMaximum: function () {
        // covered in maximum
    },
    minimum: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.3.2
        if (typeof json !== "number") {
            return;
        }
        if (schema.exclusiveMinimum !== true) {
            if (json < schema.minimum) {
                report.addError("MINIMUM", [json, schema.minimum], null, schema.description);
            }
        } else {
            if (json <= schema.minimum) {
                report.addError("MINIMUM_EXCLUSIVE", [json, schema.minimum], null, schema.description);
            }
        }
    },
    exclusiveMinimum: function () {
        // covered in minimum
    },
    maxLength: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.1.2
        if (typeof json !== "string") {
            return;
        }
        if (Utils.ucs2decode(json).length > schema.maxLength) {
            report.addError("MAX_LENGTH", [json.length, schema.maxLength], null, schema.description);
        }
    },
    minLength: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.2.2
        if (typeof json !== "string") {
            return;
        }
        if (Utils.ucs2decode(json).length < schema.minLength) {
            report.addError("MIN_LENGTH", [json.length, schema.minLength], null, schema.description);
        }
    },
    pattern: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.3.2
        if (typeof json !== "string") {
            return;
        }
        if (RegExp(schema.pattern).test(json) === false) {
            report.addError("PATTERN", [schema.pattern, json], null, schema.description);
        }
    },
    additionalItems: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.1.2
        if (!Array.isArray(json)) {
            return;
        }
        // if the value of "additionalItems" is boolean value false and the value of "items" is an array,
        // the json is valid if its size is less than, or equal to, the size of "items".
        if (schema.additionalItems === false && Array.isArray(schema.items)) {
            if (json.length > schema.items.length) {
                report.addError("ARRAY_ADDITIONAL_ITEMS", null, null, schema.description);
            }
        }
    },
    items: function () { /*report, schema, json*/
        // covered in additionalItems
    },
    maxItems: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.2.2
        if (!Array.isArray(json)) {
            return;
        }
        if (json.length > schema.maxItems) {
            report.addError("ARRAY_LENGTH_LONG", [json.length, schema.maxItems], null, schema.description);
        }
    },
    minItems: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.3.2
        if (!Array.isArray(json)) {
            return;
        }
        if (json.length < schema.minItems) {
            report.addError("ARRAY_LENGTH_SHORT", [json.length, schema.minItems], null, schema.description);
        }
    },
    uniqueItems: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.4.2
        if (!Array.isArray(json)) {
            return;
        }
        if (schema.uniqueItems === true) {
            var matches = [];
            if (Utils.isUniqueArray(json, matches) === false) {
                report.addError("ARRAY_UNIQUE", matches, null, schema.description);
            }
        }
    },
    maxProperties: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.1.2
        if (Utils.whatIs(json) !== "object") {
            return;
        }
        var keysCount = Object.keys(json).length;
        if (keysCount > schema.maxProperties) {
            report.addError("OBJECT_PROPERTIES_MAXIMUM", [keysCount, schema.maxProperties], null, schema.description);
        }
    },
    minProperties: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.2.2
        if (Utils.whatIs(json) !== "object") {
            return;
        }
        var keysCount = Object.keys(json).length;
        if (keysCount < schema.minProperties) {
            report.addError("OBJECT_PROPERTIES_MINIMUM", [keysCount, schema.minProperties], null, schema.description);
        }
    },
    required: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.3.2
        if (Utils.whatIs(json) !== "object") {
            return;
        }
        var idx = schema.required.length;
        while (idx--) {
            var requiredPropertyName = schema.required[idx];
            if (json[requiredPropertyName] === undefined) {
                report.addError("OBJECT_MISSING_REQUIRED_PROPERTY", [requiredPropertyName], null, schema.description);
            }
        }
    },
    additionalProperties: function (report, schema, json) {
        // covered in properties and patternProperties
        if (schema.properties === undefined && schema.patternProperties === undefined) {
            return JsonValidators.properties.call(this, report, schema, json);
        }
    },
    patternProperties: function (report, schema, json) {
        // covered in properties
        if (schema.properties === undefined) {
            return JsonValidators.properties.call(this, report, schema, json);
        }
    },
    properties: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.2
        if (Utils.whatIs(json) !== "object") {
            return;
        }
        var properties = schema.properties !== undefined ? schema.properties : {};
        var patternProperties = schema.patternProperties !== undefined ? schema.patternProperties : {};
        if (schema.additionalProperties === false) {
            // The property set of the json to validate.
            var s = Object.keys(json);
            // The property set from "properties".
            var p = Object.keys(properties);
            // The property set from "patternProperties".
            var pp = Object.keys(patternProperties);
            // remove from "s" all elements of "p", if any;
            s = Utils.difference(s, p);
            // for each regex in "pp", remove all elements of "s" which this regex matches.
            var idx = pp.length;
            while (idx--) {
                var regExp = RegExp(pp[idx]),
                    idx2 = s.length;
                while (idx2--) {
                    if (regExp.test(s[idx2]) === true) {
                        s.splice(idx2, 1);
                    }
                }
            }
            // Validation of the json succeeds if, after these two steps, set "s" is empty.
            if (s.length > 0) {
                // assumeAdditional can be an array of allowed properties
                var idx3 = this.options.assumeAdditional.length;
                if (idx3) {
                    while (idx3--) {
                        var io = s.indexOf(this.options.assumeAdditional[idx3]);
                        if (io !== -1) {
                            s.splice(io, 1);
                        }
                    }
                }
                if (s.length > 0) {
                    report.addError("OBJECT_ADDITIONAL_PROPERTIES", [s], null, schema.description);
                }
            }
        }
    },
    dependencies: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.5.2
        if (Utils.whatIs(json) !== "object") {
            return;
        }

        var keys = Object.keys(schema.dependencies),
            idx = keys.length;

        while (idx--) {
            // iterate all dependencies
            var dependencyName = keys[idx];
            if (json[dependencyName]) {
                var dependencyDefinition = schema.dependencies[dependencyName];
                if (Utils.whatIs(dependencyDefinition) === "object") {
                    // if dependency is a schema, validate against this schema
                    exports.validate.call(this, report, dependencyDefinition, json);
                } else { // Array
                    // if dependency is an array, object needs to have all properties in this array
                    var idx2 = dependencyDefinition.length;
                    while (idx2--) {
                        var requiredPropertyName = dependencyDefinition[idx2];
                        if (json[requiredPropertyName] === undefined) {
                            report.addError("OBJECT_DEPENDENCY_KEY", [requiredPropertyName, dependencyName], null, schema.description);
                        }
                    }
                }
            }
        }
    },
    enum: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.1.2
        var match = false,
            idx = schema.enum.length;
        while (idx--) {
            if (Utils.areEqual(json, schema.enum[idx])) {
                match = true;
                break;
            }
        }
        if (match === false) {
            report.addError("ENUM_MISMATCH", [json], null, schema.description);
        }
    },
    /*
    type: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.2.2
        // type is handled before this is called so ignore
    },
    */
    allOf: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.3.2
        var idx = schema.allOf.length;
        while (idx--) {
            var validateResult = exports.validate.call(this, report, schema.allOf[idx], json);
            if (this.options.breakOnFirstError && validateResult === false) {
                break;
            }
        }
    },
    anyOf: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.4.2
        var subReports = [],
            passed = false,
            idx = schema.anyOf.length;

        while (idx-- && passed === false) {
            var subReport = new Report(report);
            subReports.push(subReport);
            passed = exports.validate.call(this, subReport, schema.anyOf[idx], json);
        }

        if (passed === false) {
            report.addError("ANY_OF_MISSING", undefined, subReports, schema.description);
        }
    },
    oneOf: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.5.2
        var passes = 0,
            subReports = [],
            idx = schema.oneOf.length;

        while (idx--) {
            var subReport = new Report(report, { maxErrors: 1 });
            subReports.push(subReport);
            if (exports.validate.call(this, subReport, schema.oneOf[idx], json) === true) {
                passes++;
            }
        }

        if (passes === 0) {
            report.addError("ONE_OF_MISSING", undefined, subReports, schema.description);
        } else if (passes > 1) {
            report.addError("ONE_OF_MULTIPLE", null, null, schema.description);
        }
    },
    not: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.6.2
        var subReport = new Report(report);
        if (exports.validate.call(this, subReport, schema.not, json) === true) {
            report.addError("NOT_PASSED", null, null, schema.description);
        }
    },
    definitions: function () { /*report, schema, json*/
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.7.2
        // nothing to do here
    },
    format: function (report, schema, json) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.7.2
        var formatValidatorFn = FormatValidators[schema.format];
        if (typeof formatValidatorFn === "function") {
            if (formatValidatorFn.length === 2) {
                // async
                report.addAsyncTask(formatValidatorFn, [json], function (result) {
                    if (result !== true) {
                        report.addError("INVALID_FORMAT", [schema.format, json], null, schema.description);
                    }
                });
            } else {
                // sync
                if (formatValidatorFn.call(this, json) !== true) {
                    report.addError("INVALID_FORMAT", [schema.format, json], null, schema.description);
                }
            }
        } else if (this.options.ignoreUnknownFormats !== true) {
            report.addError("UNKNOWN_FORMAT", [schema.format], null, schema.description);
        }
    }
};

var recurseArray = function (report, schema, json) {
    // http://json-schema.org/latest/json-schema-validation.html#rfc.section.8.2

    var idx = json.length;

    // If "items" is an array, this situation, the schema depends on the index:
    // if the index is less than, or equal to, the size of "items",
    // the child instance must be valid against the corresponding schema in the "items" array;
    // otherwise, it must be valid against the schema defined by "additionalItems".
    if (Array.isArray(schema.items)) {

        while (idx--) {
            // equal to doesnt make sense here
            if (idx < schema.items.length) {
                report.path.push(idx.toString());
                exports.validate.call(this, report, schema.items[idx], json[idx]);
                report.path.pop();
            } else {
                // might be boolean, so check that it's an object
                if (typeof schema.additionalItems === "object") {
                    report.path.push(idx.toString());
                    exports.validate.call(this, report, schema.additionalItems, json[idx]);
                    report.path.pop();
                }
            }
        }

    } else if (typeof schema.items === "object") {

        // If items is a schema, then the child instance must be valid against this schema,
        // regardless of its index, and regardless of the value of "additionalItems".
        while (idx--) {
            report.path.push(idx.toString());
            exports.validate.call(this, report, schema.items, json[idx]);
            report.path.pop();
        }

    }
};

var recurseObject = function (report, schema, json) {
    // http://json-schema.org/latest/json-schema-validation.html#rfc.section.8.3

    // If "additionalProperties" is absent, it is considered present with an empty schema as a value.
    // In addition, boolean value true is considered equivalent to an empty schema.
    var additionalProperties = schema.additionalProperties;
    if (additionalProperties === true || additionalProperties === undefined) {
        additionalProperties = {};
    }

    // p - The property set from "properties".
    var p = schema.properties ? Object.keys(schema.properties) : [];

    // pp - The property set from "patternProperties". Elements of this set will be called regexes for convenience.
    var pp = schema.patternProperties ? Object.keys(schema.patternProperties) : [];

    // m - The property name of the child.
    var keys = Object.keys(json),
        idx = keys.length;

    while (idx--) {
        var m = keys[idx],
            propertyValue = json[m];

        // s - The set of schemas for the child instance.
        var s = [];

        // 1. If set "p" contains value "m", then the corresponding schema in "properties" is added to "s".
        if (p.indexOf(m) !== -1) {
            s.push(schema.properties[m]);
        }

        // 2. For each regex in "pp", if it matches "m" successfully, the corresponding schema in "patternProperties" is added to "s".
        var idx2 = pp.length;
        while (idx2--) {
            var regexString = pp[idx2];
            if (RegExp(regexString).test(m) === true) {
                s.push(schema.patternProperties[regexString]);
            }
        }

        // 3. The schema defined by "additionalProperties" is added to "s" if and only if, at this stage, "s" is empty.
        if (s.length === 0 && additionalProperties !== false) {
            s.push(additionalProperties);
        }

        // we are passing tests even without this assert because this is covered by properties check
        // if s is empty in this stage, no additionalProperties are allowed
        // report.expect(s.length !== 0, 'E001', m);

        // Instance property value must pass all schemas from s
        idx2 = s.length;
        while (idx2--) {
            report.path.push(m);
            exports.validate.call(this, report, s[idx2], propertyValue);
            report.path.pop();
        }
    }
};

exports.validate = function (report, schema, json) {

    report.commonErrorMessage = "JSON_OBJECT_VALIDATION_FAILED";

    // check if schema is an object
    var to = Utils.whatIs(schema);
    if (to !== "object") {
        report.addError("SCHEMA_NOT_AN_OBJECT", [to], null, schema.description);
        return false;
    }

    // check if schema is empty, everything is valid against empty schema
    var keys = Object.keys(schema);
    if (keys.length === 0) {
        return true;
    }

    // this method can be called recursively, so we need to remember our root
    var isRoot = false;
    if (!report.rootSchema) {
        report.rootSchema = schema;
        isRoot = true;
    }

    // follow schema.$ref keys
    if (schema.$ref !== undefined) {
        // avoid infinite loop with maxRefs
        var maxRefs = 99;
        while (schema.$ref && maxRefs > 0) {
            if (!schema.__$refResolved) {
                report.addError("REF_UNRESOLVED", [schema.$ref], null, schema.description);
                break;
            } else if (schema.__$refResolved === schema) {
                break;
            } else {
                schema = schema.__$refResolved;
                keys = Object.keys(schema);
            }
            maxRefs--;
        }
        if (maxRefs === 0) {
            throw new Error("Circular dependency by $ref references!");
        }
    }

    // type checking first
    // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.2.2
    var jsonType = Utils.whatIs(json);
    if (schema.type) {
        if (typeof schema.type === "string") {
            if (jsonType !== schema.type && (jsonType !== "integer" || schema.type !== "number")) {
                report.addError("INVALID_TYPE", [schema.type, jsonType], null, schema.description);
                if (this.options.breakOnFirstError) {
                    return false;
                }
            }
        } else {
            if (schema.type.indexOf(jsonType) === -1 && (jsonType !== "integer" || schema.type.indexOf("number") === -1)) {
                report.addError("INVALID_TYPE", [schema.type, jsonType], null, schema.description);
                if (this.options.breakOnFirstError) {
                    return false;
                }
            }
        }
    }

    // now iterate all the keys in schema and execute validation methods
    var idx = keys.length;
    while (idx--) {
        if (JsonValidators[keys[idx]]) {
            JsonValidators[keys[idx]].call(this, report, schema, json);
            if (report.errors.length && this.options.breakOnFirstError) { break; }
        }
    }

    if (report.errors.length === 0 || this.options.breakOnFirstError === false) {
        if (jsonType === "array") {
            recurseArray.call(this, report, schema, json);
        } else if (jsonType === "object") {
            recurseObject.call(this, report, schema, json);
        }
    }

    if (typeof this.options.customValidator === "function") {
        this.options.customValidator(report, schema, json);
    }

    // we don't need the root pointer anymore
    if (isRoot) {
        report.rootSchema = undefined;
    }

    // return valid just to be able to break at some code points
    return report.errors.length === 0;

};

},{"./FormatValidators":182,"./Report":185,"./Utils":189}],184:[function(require,module,exports){
// Number.isFinite polyfill
// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite
if (typeof Number.isFinite !== "function") {
    Number.isFinite = function isFinite(value) {
        // 1. If Type(number) is not Number, return false.
        if (typeof value !== "number") {
            return false;
        }
        // 2. If number is NaN, +∞, or −∞, return false.
        if (value !== value || value === Infinity || value === -Infinity) {
            return false;
        }
        // 3. Otherwise, return true.
        return true;
    };
}

},{}],185:[function(require,module,exports){
(function (process){
"use strict";

var get    = require("lodash.get");
var Errors = require("./Errors");
var Utils  = require("./Utils");

function Report(parentOrOptions, reportOptions) {
    this.parentReport = parentOrOptions instanceof Report ?
                            parentOrOptions :
                            undefined;

    this.options = parentOrOptions instanceof Report ?
                       parentOrOptions.options :
                       parentOrOptions || {};

    this.reportOptions = reportOptions || {};

    this.errors = [];
    this.path = [];
    this.asyncTasks = [];
}

Report.prototype.isValid = function () {
    if (this.asyncTasks.length > 0) {
        throw new Error("Async tasks pending, can't answer isValid");
    }
    return this.errors.length === 0;
};

Report.prototype.addAsyncTask = function (fn, args, asyncTaskResultProcessFn) {
    this.asyncTasks.push([fn, args, asyncTaskResultProcessFn]);
};

Report.prototype.processAsyncTasks = function (timeout, callback) {

    var validationTimeout = timeout || 2000,
        tasksCount        = this.asyncTasks.length,
        idx               = tasksCount,
        timedOut          = false,
        self              = this;

    function finish() {
        process.nextTick(function () {
            var valid = self.errors.length === 0,
                err   = valid ? undefined : self.errors;
            callback(err, valid);
        });
    }

    function respond(asyncTaskResultProcessFn) {
        return function (asyncTaskResult) {
            if (timedOut) { return; }
            asyncTaskResultProcessFn(asyncTaskResult);
            if (--tasksCount === 0) {
                finish();
            }
        };
    }

    if (tasksCount === 0 || this.errors.length > 0) {
        finish();
        return;
    }

    while (idx--) {
        var task = this.asyncTasks[idx];
        task[0].apply(null, task[1].concat(respond(task[2])));
    }

    setTimeout(function () {
        if (tasksCount > 0) {
            timedOut = true;
            self.addError("ASYNC_TIMEOUT", [tasksCount, validationTimeout]);
            callback(self.errors, false);
        }
    }, validationTimeout);

};

Report.prototype.getPath = function (returnPathAsString) {
    var path = [];
    if (this.parentReport) {
        path = path.concat(this.parentReport.path);
    }
    path = path.concat(this.path);

    if (returnPathAsString !== true) {
        // Sanitize the path segments (http://tools.ietf.org/html/rfc6901#section-4)
        path = "#/" + path.map(function (segment) {

            if (Utils.isAbsoluteUri(segment)) {
                return "uri(" + segment + ")";
            }

            return segment.replace(/\~/g, "~0").replace(/\//g, "~1");
        }).join("/");
    }
    return path;
};

Report.prototype.getSchemaId = function () {

    if (!this.rootSchema) {
        return null;
    }

    // get the error path as an array
    var path = [];
    if (this.parentReport) {
        path = path.concat(this.parentReport.path);
    }
    path = path.concat(this.path);

    // try to find id in the error path
    while (path.length > 0) {
        var obj = get(this.rootSchema, path);
        if (obj && obj.id) { return obj.id; }
        path.pop();
    }

    // return id of the root
    return this.rootSchema.id;
};

Report.prototype.hasError = function (errorCode, params) {
    var idx = this.errors.length;
    while (idx--) {
        if (this.errors[idx].code === errorCode) {
            // assume match
            var match = true;

            // check the params too
            var idx2 = this.errors[idx].params.length;
            while (idx2--) {
                if (this.errors[idx].params[idx2] !== params[idx2]) {
                    match = false;
                }
            }

            // if match, return true
            if (match) { return match; }
        }
    }
    return false;
};

Report.prototype.addError = function (errorCode, params, subReports, schemaDescription) {
    if (!errorCode) { throw new Error("No errorCode passed into addError()"); }

    this.addCustomError(errorCode, Errors[errorCode], params, subReports, schemaDescription);
};

Report.prototype.addCustomError = function (errorCode, errorMessage, params, subReports, schemaDescription) {
    if (this.errors.length >= this.reportOptions.maxErrors) {
        return;
    }

    if (!errorMessage) { throw new Error("No errorMessage known for code " + errorCode); }

    params = params || [];

    var idx = params.length;
    while (idx--) {
        var whatIs = Utils.whatIs(params[idx]);
        var param = (whatIs === "object" || whatIs === "null") ? JSON.stringify(params[idx]) : params[idx];
        errorMessage = errorMessage.replace("{" + idx + "}", param);
    }

    var err = {
        code: errorCode,
        params: params,
        message: errorMessage,
        path: this.getPath(this.options.reportPathAsArray),
        schemaId: this.getSchemaId()
    };

    if (schemaDescription) {
        err.description = schemaDescription;
    }

    if (subReports != null) {
        if (!Array.isArray(subReports)) {
            subReports = [subReports];
        }
        err.inner = [];
        idx = subReports.length;
        while (idx--) {
            var subReport = subReports[idx],
                idx2 = subReport.errors.length;
            while (idx2--) {
                err.inner.push(subReport.errors[idx2]);
            }
        }
        if (err.inner.length === 0) {
            err.inner = undefined;
        }
    }

    this.errors.push(err);
};

module.exports = Report;

}).call(this,require('_process'))

},{"./Errors":181,"./Utils":189,"_process":93,"lodash.get":78}],186:[function(require,module,exports){
"use strict";

var isequal             = require("lodash.isequal");
var Report              = require("./Report");
var SchemaCompilation   = require("./SchemaCompilation");
var SchemaValidation    = require("./SchemaValidation");
var Utils               = require("./Utils");

function decodeJSONPointer(str) {
    // http://tools.ietf.org/html/draft-ietf-appsawg-json-pointer-07#section-3
    return decodeURIComponent(str).replace(/~[0-1]/g, function (x) {
        return x === "~1" ? "/" : "~";
    });
}

function getRemotePath(uri) {
    var io = uri.indexOf("#");
    return io === -1 ? uri : uri.slice(0, io);
}

function getQueryPath(uri) {
    var io = uri.indexOf("#");
    var res = io === -1 ? undefined : uri.slice(io + 1);
    // WARN: do not slice slash, #/ means take root and go down from it
    // if (res && res[0] === "/") { res = res.slice(1); }
    return res;
}

function findId(schema, id) {
    // process only arrays and objects
    if (typeof schema !== "object" || schema === null) {
        return;
    }

    // no id means root so return itself
    if (!id) {
        return schema;
    }

    if (schema.id) {
        if (schema.id === id || schema.id[0] === "#" && schema.id.substring(1) === id) {
            return schema;
        }
    }

    var idx, result;
    if (Array.isArray(schema)) {
        idx = schema.length;
        while (idx--) {
            result = findId(schema[idx], id);
            if (result) { return result; }
        }
    } else {
        var keys = Object.keys(schema);
        idx = keys.length;
        while (idx--) {
            var k = keys[idx];
            if (k.indexOf("__$") === 0) {
                continue;
            }
            result = findId(schema[k], id);
            if (result) { return result; }
        }
    }
}

exports.cacheSchemaByUri = function (uri, schema) {
    var remotePath = getRemotePath(uri);
    if (remotePath) {
        this.cache[remotePath] = schema;
    }
};

exports.removeFromCacheByUri = function (uri) {
    var remotePath = getRemotePath(uri);
    if (remotePath) {
        delete this.cache[remotePath];
    }
};

exports.checkCacheForUri = function (uri) {
    var remotePath = getRemotePath(uri);
    return remotePath ? this.cache[remotePath] != null : false;
};

exports.getSchema = function (report, schema) {
    if (typeof schema === "object") {
        schema = exports.getSchemaByReference.call(this, report, schema);
    }
    if (typeof schema === "string") {
        schema = exports.getSchemaByUri.call(this, report, schema);
    }
    return schema;
};

exports.getSchemaByReference = function (report, key) {
    var i = this.referenceCache.length;
    while (i--) {
        if (isequal(this.referenceCache[i][0], key)) {
            return this.referenceCache[i][1];
        }
    }
    // not found
    var schema = Utils.cloneDeep(key);
    this.referenceCache.push([key, schema]);
    return schema;
};

exports.getSchemaByUri = function (report, uri, root) {
    var remotePath = getRemotePath(uri),
        queryPath = getQueryPath(uri),
        result = remotePath ? this.cache[remotePath] : root;

    if (result && remotePath) {
        // we need to avoid compiling schemas in a recursive loop
        var compileRemote = result !== root;
        // now we need to compile and validate resolved schema (in case it's not already)
        if (compileRemote) {

            report.path.push(remotePath);

            var remoteReport = new Report(report);
            if (SchemaCompilation.compileSchema.call(this, remoteReport, result)) {
                var savedOptions = this.options;
                try {
                    // If custom validationOptions were provided to setRemoteReference(),
                    // use them instead of the default options
                    this.options = result.__$validationOptions || this.options;
                    SchemaValidation.validateSchema.call(this, remoteReport, result);
                } finally {
                    this.options = savedOptions;
                }
            }
            var remoteReportIsValid = remoteReport.isValid();
            if (!remoteReportIsValid) {
                report.addError("REMOTE_NOT_VALID", [uri], remoteReport);
            }

            report.path.pop();

            if (!remoteReportIsValid) {
                return undefined;
            }
        }
    }

    if (result && queryPath) {
        var parts = queryPath.split("/");
        for (var idx = 0, lim = parts.length; result && idx < lim; idx++) {
            var key = decodeJSONPointer(parts[idx]);
            if (idx === 0) { // it's an id
                result = findId(result, key);
            } else { // it's a path behind id
                result = result[key];
            }
        }
    }

    return result;
};

exports.getRemotePath = getRemotePath;

},{"./Report":185,"./SchemaCompilation":187,"./SchemaValidation":188,"./Utils":189,"lodash.isequal":81}],187:[function(require,module,exports){
"use strict";

var Report      = require("./Report");
var SchemaCache = require("./SchemaCache");
var Utils       = require("./Utils");

function mergeReference(scope, ref) {
    if (Utils.isAbsoluteUri(ref)) {
        return ref;
    }

    var joinedScope = scope.join(""),
        isScopeAbsolute = Utils.isAbsoluteUri(joinedScope),
        isScopeRelative = Utils.isRelativeUri(joinedScope),
        isRefRelative = Utils.isRelativeUri(ref),
        toRemove;

    if (isScopeAbsolute && isRefRelative) {
        toRemove = joinedScope.match(/\/[^\/]*$/);
        if (toRemove) {
            joinedScope = joinedScope.slice(0, toRemove.index + 1);
        }
    } else if (isScopeRelative && isRefRelative) {
        joinedScope = "";
    } else {
        toRemove = joinedScope.match(/[^#/]+$/);
        if (toRemove) {
            joinedScope = joinedScope.slice(0, toRemove.index);
        }
    }

    var res = joinedScope + ref;
    res = res.replace(/##/, "#");
    return res;
}

function collectReferences(obj, results, scope, path) {
    results = results || [];
    scope = scope || [];
    path = path || [];

    if (typeof obj !== "object" || obj === null) {
        return results;
    }

    if (typeof obj.id === "string") {
        scope.push(obj.id);
    }

    if (typeof obj.$ref === "string" && typeof obj.__$refResolved === "undefined") {
        results.push({
            ref: mergeReference(scope, obj.$ref),
            key: "$ref",
            obj: obj,
            path: path.slice(0)
        });
    }
    if (typeof obj.$schema === "string" && typeof obj.__$schemaResolved === "undefined") {
        results.push({
            ref: mergeReference(scope, obj.$schema),
            key: "$schema",
            obj: obj,
            path: path.slice(0)
        });
    }

    var idx;
    if (Array.isArray(obj)) {
        idx = obj.length;
        while (idx--) {
            path.push(idx.toString());
            collectReferences(obj[idx], results, scope, path);
            path.pop();
        }
    } else {
        var keys = Object.keys(obj);
        idx = keys.length;
        while (idx--) {
            // do not recurse through resolved references and other z-schema props
            if (keys[idx].indexOf("__$") === 0) { continue; }
            path.push(keys[idx]);
            collectReferences(obj[keys[idx]], results, scope, path);
            path.pop();
        }
    }

    if (typeof obj.id === "string") {
        scope.pop();
    }

    return results;
}

var compileArrayOfSchemasLoop = function (mainReport, arr) {
    var idx = arr.length,
        compiledCount = 0;

    while (idx--) {

        // try to compile each schema separately
        var report = new Report(mainReport);
        var isValid = exports.compileSchema.call(this, report, arr[idx]);
        if (isValid) { compiledCount++; }

        // copy errors to report
        mainReport.errors = mainReport.errors.concat(report.errors);

    }

    return compiledCount;
};

function findId(arr, id) {
    var idx = arr.length;
    while (idx--) {
        if (arr[idx].id === id) {
            return arr[idx];
        }
    }
    return null;
}

var compileArrayOfSchemas = function (report, arr) {

    var compiled = 0,
        lastLoopCompiled;

    do {

        // remove all UNRESOLVABLE_REFERENCE errors before compiling array again
        var idx = report.errors.length;
        while (idx--) {
            if (report.errors[idx].code === "UNRESOLVABLE_REFERENCE") {
                report.errors.splice(idx, 1);
            }
        }

        // remember how many were compiled in the last loop
        lastLoopCompiled = compiled;

        // count how many are compiled now
        compiled = compileArrayOfSchemasLoop.call(this, report, arr);

        // fix __$missingReferences if possible
        idx = arr.length;
        while (idx--) {
            var sch = arr[idx];
            if (sch.__$missingReferences) {
                var idx2 = sch.__$missingReferences.length;
                while (idx2--) {
                    var refObj = sch.__$missingReferences[idx2];
                    var response = findId(arr, refObj.ref);
                    if (response) {
                        // this might create circular references
                        refObj.obj["__" + refObj.key + "Resolved"] = response;
                        // it's resolved now so delete it
                        sch.__$missingReferences.splice(idx2, 1);
                    }
                }
                if (sch.__$missingReferences.length === 0) {
                    delete sch.__$missingReferences;
                }
            }
        }

        // keep repeating if not all compiled and at least one more was compiled in the last loop
    } while (compiled !== arr.length && compiled !== lastLoopCompiled);

    return report.isValid();

};

exports.compileSchema = function (report, schema) {

    report.commonErrorMessage = "SCHEMA_COMPILATION_FAILED";

    // if schema is a string, assume it's a uri
    if (typeof schema === "string") {
        var loadedSchema = SchemaCache.getSchemaByUri.call(this, report, schema);
        if (!loadedSchema) {
            report.addError("SCHEMA_NOT_REACHABLE", [schema]);
            return false;
        }
        schema = loadedSchema;
    }

    // if schema is an array, assume it's an array of schemas
    if (Array.isArray(schema)) {
        return compileArrayOfSchemas.call(this, report, schema);
    }

    // if we have an id than it should be cached already (if this instance has compiled it)
    if (schema.__$compiled && schema.id && SchemaCache.checkCacheForUri.call(this, schema.id) === false) {
        schema.__$compiled = undefined;
    }

    // do not re-compile schemas
    if (schema.__$compiled) {
        return true;
    }

    if (schema.id && typeof schema.id === "string") {
        // add this to our schemaCache (before compilation in case we have references including id)
        SchemaCache.cacheSchemaByUri.call(this, schema.id, schema);
    }

    // this method can be called recursively, so we need to remember our root
    var isRoot = false;
    if (!report.rootSchema) {
        report.rootSchema = schema;
        isRoot = true;
    }

    // delete all __$missingReferences from previous compilation attempts
    var isValidExceptReferences = report.isValid();
    delete schema.__$missingReferences;

    // collect all references that need to be resolved - $ref and $schema
    var refs = collectReferences.call(this, schema),
        idx = refs.length;
    while (idx--) {
        // resolve all the collected references into __xxxResolved pointer
        var refObj = refs[idx];
        var response = SchemaCache.getSchemaByUri.call(this, report, refObj.ref, schema);

        // we can try to use custom schemaReader if available
        if (!response) {
            var schemaReader = this.getSchemaReader();
            if (schemaReader) {
                // it's supposed to return a valid schema
                var s = schemaReader(refObj.ref);
                if (s) {
                    // it needs to have the id
                    s.id = refObj.ref;
                    // try to compile the schema
                    var subreport = new Report(report);
                    if (!exports.compileSchema.call(this, subreport, s)) {
                        // copy errors to report
                        report.errors = report.errors.concat(subreport.errors);
                    } else {
                        response = SchemaCache.getSchemaByUri.call(this, report, refObj.ref, schema);
                    }
                }
            }
        }

        if (!response) {

            var hasNotValid = report.hasError("REMOTE_NOT_VALID", [refObj.ref]);
            var isAbsolute = Utils.isAbsoluteUri(refObj.ref);
            var isDownloaded = false;
            var ignoreUnresolvableRemotes = this.options.ignoreUnresolvableReferences === true;

            if (isAbsolute) {
                // we shouldn't add UNRESOLVABLE_REFERENCE for schemas we already have downloaded
                // and set through setRemoteReference method
                isDownloaded = SchemaCache.checkCacheForUri.call(this, refObj.ref);
            }

            if (hasNotValid) {
                // already has REMOTE_NOT_VALID error for this one
            } else if (ignoreUnresolvableRemotes && isAbsolute) {
                // ignoreUnresolvableRemotes is on and remote isAbsolute
            } else if (isDownloaded) {
                // remote is downloaded, so no UNRESOLVABLE_REFERENCE
            } else {
                Array.prototype.push.apply(report.path, refObj.path);
                report.addError("UNRESOLVABLE_REFERENCE", [refObj.ref]);
                report.path = report.path.slice(0, -refObj.path.length);

                // pusblish unresolved references out
                if (isValidExceptReferences) {
                    schema.__$missingReferences = schema.__$missingReferences || [];
                    schema.__$missingReferences.push(refObj);
                }
            }
        }
        // this might create circular references
        refObj.obj["__" + refObj.key + "Resolved"] = response;
    }

    var isValid = report.isValid();
    if (isValid) {
        schema.__$compiled = true;
    } else {
        if (schema.id && typeof schema.id === "string") {
            // remove this schema from schemaCache because it failed to compile
            SchemaCache.removeFromCacheByUri.call(this, schema.id);
        }
    }

    // we don't need the root pointer anymore
    if (isRoot) {
        report.rootSchema = undefined;
    }

    return isValid;

};

},{"./Report":185,"./SchemaCache":186,"./Utils":189}],188:[function(require,module,exports){
"use strict";

var FormatValidators = require("./FormatValidators"),
    JsonValidation   = require("./JsonValidation"),
    Report           = require("./Report"),
    Utils            = require("./Utils");

var SchemaValidators = {
    $ref: function (report, schema) {
        // http://tools.ietf.org/html/draft-ietf-appsawg-json-pointer-07
        // http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03
        if (typeof schema.$ref !== "string") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["$ref", "string"]);
        }
    },
    $schema: function (report, schema) {
        // http://json-schema.org/latest/json-schema-core.html#rfc.section.6
        if (typeof schema.$schema !== "string") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["$schema", "string"]);
        }
    },
    multipleOf: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.1.1
        if (typeof schema.multipleOf !== "number") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["multipleOf", "number"]);
        } else if (schema.multipleOf <= 0) {
            report.addError("KEYWORD_MUST_BE", ["multipleOf", "strictly greater than 0"]);
        }
    },
    maximum: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.2.1
        if (typeof schema.maximum !== "number") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["maximum", "number"]);
        }
    },
    exclusiveMaximum: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.2.1
        if (typeof schema.exclusiveMaximum !== "boolean") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["exclusiveMaximum", "boolean"]);
        } else if (schema.maximum === undefined) {
            report.addError("KEYWORD_DEPENDENCY", ["exclusiveMaximum", "maximum"]);
        }
    },
    minimum: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.3.1
        if (typeof schema.minimum !== "number") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["minimum", "number"]);
        }
    },
    exclusiveMinimum: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.3.1
        if (typeof schema.exclusiveMinimum !== "boolean") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["exclusiveMinimum", "boolean"]);
        } else if (schema.minimum === undefined) {
            report.addError("KEYWORD_DEPENDENCY", ["exclusiveMinimum", "minimum"]);
        }
    },
    maxLength: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.1.1
        if (Utils.whatIs(schema.maxLength) !== "integer") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["maxLength", "integer"]);
        } else if (schema.maxLength < 0) {
            report.addError("KEYWORD_MUST_BE", ["maxLength", "greater than, or equal to 0"]);
        }
    },
    minLength: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.2.1
        if (Utils.whatIs(schema.minLength) !== "integer") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["minLength", "integer"]);
        } else if (schema.minLength < 0) {
            report.addError("KEYWORD_MUST_BE", ["minLength", "greater than, or equal to 0"]);
        }
    },
    pattern: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.3.1
        if (typeof schema.pattern !== "string") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["pattern", "string"]);
        } else {
            try {
                RegExp(schema.pattern);
            } catch (e) {
                report.addError("KEYWORD_PATTERN", ["pattern", schema.pattern]);
            }
        }
    },
    additionalItems: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.1.1
        var type = Utils.whatIs(schema.additionalItems);
        if (type !== "boolean" && type !== "object") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["additionalItems", ["boolean", "object"]]);
        } else if (type === "object") {
            report.path.push("additionalItems");
            exports.validateSchema.call(this, report, schema.additionalItems);
            report.path.pop();
        }
    },
    items: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.1.1
        var type = Utils.whatIs(schema.items);

        if (type === "object") {
            report.path.push("items");
            exports.validateSchema.call(this, report, schema.items);
            report.path.pop();
        } else if (type === "array") {
            var idx = schema.items.length;
            while (idx--) {
                report.path.push("items");
                report.path.push(idx.toString());
                exports.validateSchema.call(this, report, schema.items[idx]);
                report.path.pop();
                report.path.pop();
            }
        } else {
            report.addError("KEYWORD_TYPE_EXPECTED", ["items", ["array", "object"]]);
        }

        // custom - strict mode
        if (this.options.forceAdditional === true && schema.additionalItems === undefined && Array.isArray(schema.items)) {
            report.addError("KEYWORD_UNDEFINED_STRICT", ["additionalItems"]);
        }
        // custome - assume defined false mode
        if (this.options.assumeAdditional && schema.additionalItems === undefined && Array.isArray(schema.items)) {
            schema.additionalItems = false;
        }
    },
    maxItems: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.2.1
        if (typeof schema.maxItems !== "number") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["maxItems", "integer"]);
        } else if (schema.maxItems < 0) {
            report.addError("KEYWORD_MUST_BE", ["maxItems", "greater than, or equal to 0"]);
        }
    },
    minItems: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.3.1
        if (Utils.whatIs(schema.minItems) !== "integer") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["minItems", "integer"]);
        } else if (schema.minItems < 0) {
            report.addError("KEYWORD_MUST_BE", ["minItems", "greater than, or equal to 0"]);
        }
    },
    uniqueItems: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.4.1
        if (typeof schema.uniqueItems !== "boolean") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["uniqueItems", "boolean"]);
        }
    },
    maxProperties: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.1.1
        if (Utils.whatIs(schema.maxProperties) !== "integer") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["maxProperties", "integer"]);
        } else if (schema.maxProperties < 0) {
            report.addError("KEYWORD_MUST_BE", ["maxProperties", "greater than, or equal to 0"]);
        }
    },
    minProperties: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.2.1
        if (Utils.whatIs(schema.minProperties) !== "integer") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["minProperties", "integer"]);
        } else if (schema.minProperties < 0) {
            report.addError("KEYWORD_MUST_BE", ["minProperties", "greater than, or equal to 0"]);
        }
    },
    required: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.3.1
        if (Utils.whatIs(schema.required) !== "array") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["required", "array"]);
        } else if (schema.required.length === 0) {
            report.addError("KEYWORD_MUST_BE", ["required", "an array with at least one element"]);
        } else {
            var idx = schema.required.length;
            while (idx--) {
                if (typeof schema.required[idx] !== "string") {
                    report.addError("KEYWORD_VALUE_TYPE", ["required", "string"]);
                }
            }
            if (Utils.isUniqueArray(schema.required) === false) {
                report.addError("KEYWORD_MUST_BE", ["required", "an array with unique items"]);
            }
        }
    },
    additionalProperties: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.1
        var type = Utils.whatIs(schema.additionalProperties);
        if (type !== "boolean" && type !== "object") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["additionalProperties", ["boolean", "object"]]);
        } else if (type === "object") {
            report.path.push("additionalProperties");
            exports.validateSchema.call(this, report, schema.additionalProperties);
            report.path.pop();
        }
    },
    properties: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.1
        if (Utils.whatIs(schema.properties) !== "object") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["properties", "object"]);
            return;
        }

        var keys = Object.keys(schema.properties),
            idx = keys.length;
        while (idx--) {
            var key = keys[idx],
                val = schema.properties[key];
            report.path.push("properties");
            report.path.push(key);
            exports.validateSchema.call(this, report, val);
            report.path.pop();
            report.path.pop();
        }

        // custom - strict mode
        if (this.options.forceAdditional === true && schema.additionalProperties === undefined) {
            report.addError("KEYWORD_UNDEFINED_STRICT", ["additionalProperties"]);
        }
        // custome - assume defined false mode
        if (this.options.assumeAdditional && schema.additionalProperties === undefined) {
            schema.additionalProperties = false;
        }
        // custom - forceProperties
        if (this.options.forceProperties === true && keys.length === 0) {
            report.addError("CUSTOM_MODE_FORCE_PROPERTIES", ["properties"]);
        }
    },
    patternProperties: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.1
        if (Utils.whatIs(schema.patternProperties) !== "object") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["patternProperties", "object"]);
            return;
        }

        var keys = Object.keys(schema.patternProperties),
            idx = keys.length;
        while (idx--) {
            var key = keys[idx],
                val = schema.patternProperties[key];
            try {
                RegExp(key);
            } catch (e) {
                report.addError("KEYWORD_PATTERN", ["patternProperties", key]);
            }
            report.path.push("patternProperties");
            report.path.push(key.toString());
            exports.validateSchema.call(this, report, val);
            report.path.pop();
            report.path.pop();
        }

        // custom - forceProperties
        if (this.options.forceProperties === true && keys.length === 0) {
            report.addError("CUSTOM_MODE_FORCE_PROPERTIES", ["patternProperties"]);
        }
    },
    dependencies: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.5.1
        if (Utils.whatIs(schema.dependencies) !== "object") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["dependencies", "object"]);
        } else {
            var keys = Object.keys(schema.dependencies),
                idx = keys.length;
            while (idx--) {
                var schemaKey = keys[idx],
                    schemaDependency = schema.dependencies[schemaKey],
                    type = Utils.whatIs(schemaDependency);

                if (type === "object") {
                    report.path.push("dependencies");
                    report.path.push(schemaKey);
                    exports.validateSchema.call(this, report, schemaDependency);
                    report.path.pop();
                    report.path.pop();
                } else if (type === "array") {
                    var idx2 = schemaDependency.length;
                    if (idx2 === 0) {
                        report.addError("KEYWORD_MUST_BE", ["dependencies", "not empty array"]);
                    }
                    while (idx2--) {
                        if (typeof schemaDependency[idx2] !== "string") {
                            report.addError("KEYWORD_VALUE_TYPE", ["dependensices", "string"]);
                        }
                    }
                    if (Utils.isUniqueArray(schemaDependency) === false) {
                        report.addError("KEYWORD_MUST_BE", ["dependencies", "an array with unique items"]);
                    }
                } else {
                    report.addError("KEYWORD_VALUE_TYPE", ["dependencies", "object or array"]);
                }
            }
        }
    },
    enum: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.1.1
        if (Array.isArray(schema.enum) === false) {
            report.addError("KEYWORD_TYPE_EXPECTED", ["enum", "array"]);
        } else if (schema.enum.length === 0) {
            report.addError("KEYWORD_MUST_BE", ["enum", "an array with at least one element"]);
        } else if (Utils.isUniqueArray(schema.enum) === false) {
            report.addError("KEYWORD_MUST_BE", ["enum", "an array with unique elements"]);
        }
    },
    type: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.2.1
        var primitiveTypes = ["array", "boolean", "integer", "number", "null", "object", "string"],
            primitiveTypeStr = primitiveTypes.join(","),
            isArray = Array.isArray(schema.type);

        if (isArray) {
            var idx = schema.type.length;
            while (idx--) {
                if (primitiveTypes.indexOf(schema.type[idx]) === -1) {
                    report.addError("KEYWORD_TYPE_EXPECTED", ["type", primitiveTypeStr]);
                }
            }
            if (Utils.isUniqueArray(schema.type) === false) {
                report.addError("KEYWORD_MUST_BE", ["type", "an object with unique properties"]);
            }
        } else if (typeof schema.type === "string") {
            if (primitiveTypes.indexOf(schema.type) === -1) {
                report.addError("KEYWORD_TYPE_EXPECTED", ["type", primitiveTypeStr]);
            }
        } else {
            report.addError("KEYWORD_TYPE_EXPECTED", ["type", ["string", "array"]]);
        }

        if (this.options.noEmptyStrings === true) {
            if (schema.type === "string" || isArray && schema.type.indexOf("string") !== -1) {
                if (schema.minLength === undefined &&
                    schema.enum === undefined &&
                    schema.format === undefined) {

                    schema.minLength = 1;
                }
            }
        }
        if (this.options.noEmptyArrays === true) {
            if (schema.type === "array" || isArray && schema.type.indexOf("array") !== -1) {
                if (schema.minItems === undefined) {
                    schema.minItems = 1;
                }
            }
        }
        if (this.options.forceProperties === true) {
            if (schema.type === "object" || isArray && schema.type.indexOf("object") !== -1) {
                if (schema.properties === undefined && schema.patternProperties === undefined) {
                    report.addError("KEYWORD_UNDEFINED_STRICT", ["properties"]);
                }
            }
        }
        if (this.options.forceItems === true) {
            if (schema.type === "array" || isArray && schema.type.indexOf("array") !== -1) {
                if (schema.items === undefined) {
                    report.addError("KEYWORD_UNDEFINED_STRICT", ["items"]);
                }
            }
        }
        if (this.options.forceMinItems === true) {
            if (schema.type === "array" || isArray && schema.type.indexOf("array") !== -1) {
                if (schema.minItems === undefined) {
                    report.addError("KEYWORD_UNDEFINED_STRICT", ["minItems"]);
                }
            }
        }
        if (this.options.forceMaxItems === true) {
            if (schema.type === "array" || isArray && schema.type.indexOf("array") !== -1) {
                if (schema.maxItems === undefined) {
                    report.addError("KEYWORD_UNDEFINED_STRICT", ["maxItems"]);
                }
            }
        }
        if (this.options.forceMinLength === true) {
            if (schema.type === "string" || isArray && schema.type.indexOf("string") !== -1) {
                if (schema.minLength === undefined &&
                    schema.format === undefined &&
                    schema.enum === undefined &&
                    schema.pattern === undefined) {
                    report.addError("KEYWORD_UNDEFINED_STRICT", ["minLength"]);
                }
            }
        }
        if (this.options.forceMaxLength === true) {
            if (schema.type === "string" || isArray && schema.type.indexOf("string") !== -1) {
                if (schema.maxLength === undefined &&
                    schema.format === undefined &&
                    schema.enum === undefined &&
                    schema.pattern === undefined) {
                    report.addError("KEYWORD_UNDEFINED_STRICT", ["maxLength"]);
                }
            }
        }
    },
    allOf: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.3.1
        if (Array.isArray(schema.allOf) === false) {
            report.addError("KEYWORD_TYPE_EXPECTED", ["allOf", "array"]);
        } else if (schema.allOf.length === 0) {
            report.addError("KEYWORD_MUST_BE", ["allOf", "an array with at least one element"]);
        } else {
            var idx = schema.allOf.length;
            while (idx--) {
                report.path.push("allOf");
                report.path.push(idx.toString());
                exports.validateSchema.call(this, report, schema.allOf[idx]);
                report.path.pop();
                report.path.pop();
            }
        }
    },
    anyOf: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.4.1
        if (Array.isArray(schema.anyOf) === false) {
            report.addError("KEYWORD_TYPE_EXPECTED", ["anyOf", "array"]);
        } else if (schema.anyOf.length === 0) {
            report.addError("KEYWORD_MUST_BE", ["anyOf", "an array with at least one element"]);
        } else {
            var idx = schema.anyOf.length;
            while (idx--) {
                report.path.push("anyOf");
                report.path.push(idx.toString());
                exports.validateSchema.call(this, report, schema.anyOf[idx]);
                report.path.pop();
                report.path.pop();
            }
        }
    },
    oneOf: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.5.1
        if (Array.isArray(schema.oneOf) === false) {
            report.addError("KEYWORD_TYPE_EXPECTED", ["oneOf", "array"]);
        } else if (schema.oneOf.length === 0) {
            report.addError("KEYWORD_MUST_BE", ["oneOf", "an array with at least one element"]);
        } else {
            var idx = schema.oneOf.length;
            while (idx--) {
                report.path.push("oneOf");
                report.path.push(idx.toString());
                exports.validateSchema.call(this, report, schema.oneOf[idx]);
                report.path.pop();
                report.path.pop();
            }
        }
    },
    not: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.6.1
        if (Utils.whatIs(schema.not) !== "object") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["not", "object"]);
        } else {
            report.path.push("not");
            exports.validateSchema.call(this, report, schema.not);
            report.path.pop();
        }
    },
    definitions: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.7.1
        if (Utils.whatIs(schema.definitions) !== "object") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["definitions", "object"]);
        } else {
            var keys = Object.keys(schema.definitions),
                idx = keys.length;
            while (idx--) {
                var key = keys[idx],
                    val = schema.definitions[key];
                report.path.push("definitions");
                report.path.push(key);
                exports.validateSchema.call(this, report, val);
                report.path.pop();
                report.path.pop();
            }
        }
    },
    format: function (report, schema) {
        if (typeof schema.format !== "string") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["format", "string"]);
        } else {
            if (FormatValidators[schema.format] === undefined && this.options.ignoreUnknownFormats !== true) {
                report.addError("UNKNOWN_FORMAT", [schema.format]);
            }
        }
    },
    id: function (report, schema) {
        // http://json-schema.org/latest/json-schema-core.html#rfc.section.7.2
        if (typeof schema.id !== "string") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["id", "string"]);
        }
    },
    title: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.6.1
        if (typeof schema.title !== "string") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["title", "string"]);
        }
    },
    description: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.6.1
        if (typeof schema.description !== "string") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["description", "string"]);
        }
    },
    "default": function (/* report, schema */) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.6.2
        // There are no restrictions placed on the value of this keyword.
    }
};

var validateArrayOfSchemas = function (report, arr) {
    var idx = arr.length;
    while (idx--) {
        exports.validateSchema.call(this, report, arr[idx]);
    }
    return report.isValid();
};

exports.validateSchema = function (report, schema) {

    report.commonErrorMessage = "SCHEMA_VALIDATION_FAILED";

    // if schema is an array, assume it's an array of schemas
    if (Array.isArray(schema)) {
        return validateArrayOfSchemas.call(this, report, schema);
    }

    // do not revalidate schema that has already been validated once
    if (schema.__$validated) {
        return true;
    }

    // if $schema is present, this schema should validate against that $schema
    var hasParentSchema = schema.$schema && schema.id !== schema.$schema;
    if (hasParentSchema) {
        if (schema.__$schemaResolved && schema.__$schemaResolved !== schema) {
            var subReport = new Report(report);
            var valid = JsonValidation.validate.call(this, subReport, schema.__$schemaResolved, schema);
            if (valid === false) {
                report.addError("PARENT_SCHEMA_VALIDATION_FAILED", null, subReport);
            }
        } else {
            if (this.options.ignoreUnresolvableReferences !== true) {
                report.addError("REF_UNRESOLVED", [schema.$schema]);
            }
        }
    }

    if (this.options.noTypeless === true) {
        // issue #36 - inherit type to anyOf, oneOf, allOf if noTypeless is defined
        if (schema.type !== undefined) {
            var schemas = [];
            if (Array.isArray(schema.anyOf)) { schemas = schemas.concat(schema.anyOf); }
            if (Array.isArray(schema.oneOf)) { schemas = schemas.concat(schema.oneOf); }
            if (Array.isArray(schema.allOf)) { schemas = schemas.concat(schema.allOf); }
            schemas.forEach(function (sch) {
                if (!sch.type) { sch.type = schema.type; }
            });
        }
        // end issue #36
        if (schema.enum === undefined &&
            schema.type === undefined &&
            schema.anyOf === undefined &&
            schema.oneOf === undefined &&
            schema.not === undefined &&
            schema.$ref === undefined) {
            report.addError("KEYWORD_UNDEFINED_STRICT", ["type"]);
        }
    }

    var keys = Object.keys(schema),
        idx = keys.length;
    while (idx--) {
        var key = keys[idx];
        if (key.indexOf("__") === 0) { continue; }
        if (SchemaValidators[key] !== undefined) {
            SchemaValidators[key].call(this, report, schema);
        } else if (!hasParentSchema) {
            if (this.options.noExtraKeywords === true) {
                report.addError("KEYWORD_UNEXPECTED", [key]);
            }
        }
    }

    if (this.options.pedanticCheck === true) {
        if (schema.enum) {
            // break recursion
            var tmpSchema = Utils.clone(schema);
            delete tmpSchema.enum;
            delete tmpSchema.default;

            report.path.push("enum");
            idx = schema.enum.length;
            while (idx--) {
                report.path.push(idx.toString());
                JsonValidation.validate.call(this, report, tmpSchema, schema.enum[idx]);
                report.path.pop();
            }
            report.path.pop();
        }

        if (schema.default) {
            report.path.push("default");
            JsonValidation.validate.call(this, report, schema, schema.default);
            report.path.pop();
        }
    }

    var isValid = report.isValid();
    if (isValid) {
        schema.__$validated = true;
    }
    return isValid;
};

},{"./FormatValidators":182,"./JsonValidation":183,"./Report":185,"./Utils":189}],189:[function(require,module,exports){
"use strict";

exports.isAbsoluteUri = function (uri) {
    return /^https?:\/\//.test(uri);
};

exports.isRelativeUri = function (uri) {
    // relative URIs that end with a hash sign, issue #56
    return /.+#/.test(uri);
};

exports.whatIs = function (what) {

    var to = typeof what;

    if (to === "object") {
        if (what === null) {
            return "null";
        }
        if (Array.isArray(what)) {
            return "array";
        }
        return "object"; // typeof what === 'object' && what === Object(what) && !Array.isArray(what);
    }

    if (to === "number") {
        if (Number.isFinite(what)) {
            if (what % 1 === 0) {
                return "integer";
            } else {
                return "number";
            }
        }
        if (Number.isNaN(what)) {
            return "not-a-number";
        }
        return "unknown-number";
    }

    return to; // undefined, boolean, string, function

};

exports.areEqual = function areEqual(json1, json2) {
    // http://json-schema.org/latest/json-schema-core.html#rfc.section.3.6

    // Two JSON values are said to be equal if and only if:
    // both are nulls; or
    // both are booleans, and have the same value; or
    // both are strings, and have the same value; or
    // both are numbers, and have the same mathematical value; or
    if (json1 === json2) {
        return true;
    }

    var i, len;

    // both are arrays, and:
    if (Array.isArray(json1) && Array.isArray(json2)) {
        // have the same number of items; and
        if (json1.length !== json2.length) {
            return false;
        }
        // items at the same index are equal according to this definition; or
        len = json1.length;
        for (i = 0; i < len; i++) {
            if (!areEqual(json1[i], json2[i])) {
                return false;
            }
        }
        return true;
    }

    // both are objects, and:
    if (exports.whatIs(json1) === "object" && exports.whatIs(json2) === "object") {
        // have the same set of property names; and
        var keys1 = Object.keys(json1);
        var keys2 = Object.keys(json2);
        if (!areEqual(keys1, keys2)) {
            return false;
        }
        // values for a same property name are equal according to this definition.
        len = keys1.length;
        for (i = 0; i < len; i++) {
            if (!areEqual(json1[keys1[i]], json2[keys1[i]])) {
                return false;
            }
        }
        return true;
    }

    return false;
};

exports.isUniqueArray = function (arr, indexes) {
    var i, j, l = arr.length;
    for (i = 0; i < l; i++) {
        for (j = i + 1; j < l; j++) {
            if (exports.areEqual(arr[i], arr[j])) {
                if (indexes) { indexes.push(i, j); }
                return false;
            }
        }
    }
    return true;
};

exports.difference = function (bigSet, subSet) {
    var arr = [],
        idx = bigSet.length;
    while (idx--) {
        if (subSet.indexOf(bigSet[idx]) === -1) {
            arr.push(bigSet[idx]);
        }
    }
    return arr;
};

// NOT a deep version of clone
exports.clone = function (src) {
    if (typeof src === "undefined") { return void 0; }
    if (typeof src !== "object" || src === null) { return src; }
    var res, idx;
    if (Array.isArray(src)) {
        res = [];
        idx = src.length;
        while (idx--) {
            res[idx] = src[idx];
        }
    } else {
        res = {};
        var keys = Object.keys(src);
        idx = keys.length;
        while (idx--) {
            var key = keys[idx];
            res[key] = src[key];
        }
    }
    return res;
};

exports.cloneDeep = function (src) {
    var visited = [], cloned = [];
    function cloneDeep(src) {
        if (typeof src !== "object" || src === null) { return src; }
        var res, idx, cidx;

        cidx = visited.indexOf(src);
        if (cidx !== -1) { return cloned[cidx]; }

        visited.push(src);
        if (Array.isArray(src)) {
            res = [];
            cloned.push(res);
            idx = src.length;
            while (idx--) {
                res[idx] = cloneDeep(src[idx]);
            }
        } else {
            res = {};
            cloned.push(res);
            var keys = Object.keys(src);
            idx = keys.length;
            while (idx--) {
                var key = keys[idx];
                res[key] = cloneDeep(src[key]);
            }
        }
        return res;
    }
    return cloneDeep(src);
};

/*
  following function comes from punycode.js library
  see: https://github.com/bestiejs/punycode.js
*/
/*jshint -W016*/
/**
 * Creates an array containing the numeric code points of each Unicode
 * character in the string. While JavaScript uses UCS-2 internally,
 * this function will convert a pair of surrogate halves (each of which
 * UCS-2 exposes as separate characters) into a single code point,
 * matching UTF-16.
 * @see `punycode.ucs2.encode`
 * @see <https://mathiasbynens.be/notes/javascript-encoding>
 * @memberOf punycode.ucs2
 * @name decode
 * @param {String} string The Unicode input string (UCS-2).
 * @returns {Array} The new array of code points.
 */
exports.ucs2decode = function (string) {
    var output = [],
        counter = 0,
        length = string.length,
        value,
        extra;
    while (counter < length) {
        value = string.charCodeAt(counter++);
        if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
            // high surrogate, and there is a next character
            extra = string.charCodeAt(counter++);
            if ((extra & 0xFC00) == 0xDC00) { // low surrogate
                output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
            } else {
                // unmatched surrogate; only append this code unit, in case the next
                // code unit is the high surrogate of a surrogate pair
                output.push(value);
                counter--;
            }
        } else {
            output.push(value);
        }
    }
    return output;
};
/*jshint +W016*/

},{}],190:[function(require,module,exports){
(function (process){
"use strict";

require("./Polyfills");
var get               = require("lodash.get");
var Report            = require("./Report");
var FormatValidators  = require("./FormatValidators");
var JsonValidation    = require("./JsonValidation");
var SchemaCache       = require("./SchemaCache");
var SchemaCompilation = require("./SchemaCompilation");
var SchemaValidation  = require("./SchemaValidation");
var Utils             = require("./Utils");
var Draft4Schema      = require("./schemas/schema.json");
var Draft4HyperSchema = require("./schemas/hyper-schema.json");

/*
    default options
*/
var defaultOptions = {
    // default timeout for all async tasks
    asyncTimeout: 2000,
    // force additionalProperties and additionalItems to be defined on "object" and "array" types
    forceAdditional: false,
    // assume additionalProperties and additionalItems are defined as "false" where appropriate
    assumeAdditional: false,
    // force items to be defined on "array" types
    forceItems: false,
    // force minItems to be defined on "array" types
    forceMinItems: false,
    // force maxItems to be defined on "array" types
    forceMaxItems: false,
    // force minLength to be defined on "string" types
    forceMinLength: false,
    // force maxLength to be defined on "string" types
    forceMaxLength: false,
    // force properties or patternProperties to be defined on "object" types
    forceProperties: false,
    // ignore references that cannot be resolved (remote schemas) // TODO: make sure this is only for remote schemas, not local ones
    ignoreUnresolvableReferences: false,
    // disallow usage of keywords that this validator can't handle
    noExtraKeywords: false,
    // disallow usage of schema's without "type" defined
    noTypeless: false,
    // disallow zero length strings in validated objects
    noEmptyStrings: false,
    // disallow zero length arrays in validated objects
    noEmptyArrays: false,
    // forces "uri" format to be in fully rfc3986 compliant
    strictUris: false,
    // turn on some of the above
    strictMode: false,
    // report error paths as an array of path segments to get to the offending node
    reportPathAsArray: false,
    // stops validation as soon as an error is found, true by default but can be turned off
    breakOnFirstError: true,
    // check if schema follow best practices and common sence
    pedanticCheck: false,
    // ignore unknown formats (do not report them as an error)
    ignoreUnknownFormats: false,
    // function to be called on every schema
    customValidator: null
};

function normalizeOptions(options) {
    var normalized;

    // options
    if (typeof options === "object") {
        var keys = Object.keys(options),
            idx = keys.length,
            key;

        // check that the options are correctly configured
        while (idx--) {
            key = keys[idx];
            if (defaultOptions[key] === undefined) {
                throw new Error("Unexpected option passed to constructor: " + key);
            }
        }

        // copy the default options into passed options
        keys = Object.keys(defaultOptions);
        idx = keys.length;
        while (idx--) {
            key = keys[idx];
            if (options[key] === undefined) {
                options[key] = Utils.clone(defaultOptions[key]);
            }
        }

        normalized = options;
    } else {
        normalized = Utils.clone(defaultOptions);
    }

    if (normalized.strictMode === true) {
        normalized.forceAdditional  = true;
        normalized.forceItems       = true;
        normalized.forceMaxLength   = true;
        normalized.forceProperties  = true;
        normalized.noExtraKeywords  = true;
        normalized.noTypeless       = true;
        normalized.noEmptyStrings   = true;
        normalized.noEmptyArrays    = true;
    }

    return normalized;
}

/*
    constructor
*/
function ZSchema(options) {
    this.cache = {};
    this.referenceCache = [];

    this.options = normalizeOptions(options);

    // Disable strict validation for the built-in schemas
    var metaschemaOptions = normalizeOptions({ });

    this.setRemoteReference("http://json-schema.org/draft-04/schema", Draft4Schema, metaschemaOptions);
    this.setRemoteReference("http://json-schema.org/draft-04/hyper-schema", Draft4HyperSchema, metaschemaOptions);
}

/*
    instance methods
*/
ZSchema.prototype.compileSchema = function (schema) {
    var report = new Report(this.options);

    schema = SchemaCache.getSchema.call(this, report, schema);

    SchemaCompilation.compileSchema.call(this, report, schema);

    this.lastReport = report;
    return report.isValid();
};
ZSchema.prototype.validateSchema = function (schema) {
    if (Array.isArray(schema) && schema.length === 0) {
        throw new Error(".validateSchema was called with an empty array");
    }

    var report = new Report(this.options);

    schema = SchemaCache.getSchema.call(this, report, schema);

    var compiled = SchemaCompilation.compileSchema.call(this, report, schema);
    if (compiled) { SchemaValidation.validateSchema.call(this, report, schema); }

    this.lastReport = report;
    return report.isValid();
};
ZSchema.prototype.validate = function (json, schema, options, callback) {

    if (Utils.whatIs(options) === "function") {
        callback = options;
        options = {};
    }
    if (!options) { options = {}; }

    var whatIs = Utils.whatIs(schema);
    if (whatIs !== "string" && whatIs !== "object") {
        var e = new Error("Invalid .validate call - schema must be an string or object but " + whatIs + " was passed!");
        if (callback) {
            process.nextTick(function () {
                callback(e, false);
            });
            return;
        }
        throw e;
    }

    var foundError = false;
    var report = new Report(this.options);

    if (typeof schema === "string") {
        var schemaName = schema;
        schema = SchemaCache.getSchema.call(this, report, schemaName);
        if (!schema) {
            throw new Error("Schema with id '" + schemaName + "' wasn't found in the validator cache!");
        }
    } else {
        schema = SchemaCache.getSchema.call(this, report, schema);
    }

    var compiled = false;
    if (!foundError) {
        compiled = SchemaCompilation.compileSchema.call(this, report, schema);
    }
    if (!compiled) {
        this.lastReport = report;
        foundError = true;
    }

    var validated = false;
    if (!foundError) {
        validated = SchemaValidation.validateSchema.call(this, report, schema);
    }
    if (!validated) {
        this.lastReport = report;
        foundError = true;
    }

    if (options.schemaPath) {
        report.rootSchema = schema;
        schema = get(schema, options.schemaPath);
        if (!schema) {
            throw new Error("Schema path '" + options.schemaPath + "' wasn't found in the schema!");
        }
    }

    if (!foundError) {
        JsonValidation.validate.call(this, report, schema, json);
    }

    if (callback) {
        report.processAsyncTasks(this.options.asyncTimeout, callback);
        return;
    } else if (report.asyncTasks.length > 0) {
        throw new Error("This validation has async tasks and cannot be done in sync mode, please provide callback argument.");
    }

    // assign lastReport so errors are retrievable in sync mode
    this.lastReport = report;
    return report.isValid();
};
ZSchema.prototype.getLastError = function () {
    if (this.lastReport.errors.length === 0) {
        return null;
    }
    var e = new Error();
    e.name = "z-schema validation error";
    e.message = this.lastReport.commonErrorMessage;
    e.details = this.lastReport.errors;
    return e;
};
ZSchema.prototype.getLastErrors = function () {
    return this.lastReport && this.lastReport.errors.length > 0 ? this.lastReport.errors : undefined;
};
ZSchema.prototype.getMissingReferences = function (arr) {
    arr = arr || this.lastReport.errors;
    var res = [],
        idx = arr.length;
    while (idx--) {
        var error = arr[idx];
        if (error.code === "UNRESOLVABLE_REFERENCE") {
            var reference = error.params[0];
            if (res.indexOf(reference) === -1) {
                res.push(reference);
            }
        }
        if (error.inner) {
            res = res.concat(this.getMissingReferences(error.inner));
        }
    }
    return res;
};
ZSchema.prototype.getMissingRemoteReferences = function () {
    var missingReferences = this.getMissingReferences(),
        missingRemoteReferences = [],
        idx = missingReferences.length;
    while (idx--) {
        var remoteReference = SchemaCache.getRemotePath(missingReferences[idx]);
        if (remoteReference && missingRemoteReferences.indexOf(remoteReference) === -1) {
            missingRemoteReferences.push(remoteReference);
        }
    }
    return missingRemoteReferences;
};
ZSchema.prototype.setRemoteReference = function (uri, schema, validationOptions) {
    if (typeof schema === "string") {
        schema = JSON.parse(schema);
    } else {
        schema = Utils.cloneDeep(schema);
    }

    if (validationOptions) {
        schema.__$validationOptions = normalizeOptions(validationOptions);
    }

    SchemaCache.cacheSchemaByUri.call(this, uri, schema);
};
ZSchema.prototype.getResolvedSchema = function (schema) {
    var report = new Report(this.options);
    schema = SchemaCache.getSchema.call(this, report, schema);

    // clone before making any modifications
    schema = Utils.cloneDeep(schema);

    var visited = [];

    // clean-up the schema and resolve references
    var cleanup = function (schema) {
        var key,
            typeOf = Utils.whatIs(schema);
        if (typeOf !== "object" && typeOf !== "array") {
            return;
        }

        if (schema.___$visited) {
            return;
        }

        schema.___$visited = true;
        visited.push(schema);

        if (schema.$ref && schema.__$refResolved) {
            var from = schema.__$refResolved;
            var to = schema;
            delete schema.$ref;
            delete schema.__$refResolved;
            for (key in from) {
                if (from.hasOwnProperty(key)) {
                    to[key] = from[key];
                }
            }
        }
        for (key in schema) {
            if (schema.hasOwnProperty(key)) {
                if (key.indexOf("__$") === 0) {
                    delete schema[key];
                } else {
                    cleanup(schema[key]);
                }
            }
        }
    };

    cleanup(schema);
    visited.forEach(function (s) {
        delete s.___$visited;
    });

    this.lastReport = report;
    if (report.isValid()) {
        return schema;
    } else {
        throw this.getLastError();
    }
};
ZSchema.prototype.setSchemaReader = function (schemaReader) {
    return ZSchema.setSchemaReader(schemaReader);
};
ZSchema.prototype.getSchemaReader = function () {
    return ZSchema.schemaReader;
};

/*
    static methods
*/
ZSchema.setSchemaReader = function (schemaReader) {
    ZSchema.schemaReader = schemaReader;
};
ZSchema.registerFormat = function (formatName, validatorFunction) {
    FormatValidators[formatName] = validatorFunction;
};
ZSchema.unregisterFormat = function (formatName) {
    delete FormatValidators[formatName];
};
ZSchema.getRegisteredFormats = function () {
    return Object.keys(FormatValidators);
};
ZSchema.getDefaultOptions = function () {
    return Utils.cloneDeep(defaultOptions);
};

module.exports = ZSchema;

}).call(this,require('_process'))

},{"./FormatValidators":182,"./JsonValidation":183,"./Polyfills":184,"./Report":185,"./SchemaCache":186,"./SchemaCompilation":187,"./SchemaValidation":188,"./Utils":189,"./schemas/hyper-schema.json":191,"./schemas/schema.json":192,"_process":93,"lodash.get":78}],191:[function(require,module,exports){
module.exports={
    "$schema": "http://json-schema.org/draft-04/hyper-schema#",
    "id": "http://json-schema.org/draft-04/hyper-schema#",
    "title": "JSON Hyper-Schema",
    "allOf": [
        {
            "$ref": "http://json-schema.org/draft-04/schema#"
        }
    ],
    "properties": {
        "additionalItems": {
            "anyOf": [
                {
                    "type": "boolean"
                },
                {
                    "$ref": "#"
                }
            ]
        },
        "additionalProperties": {
            "anyOf": [
                {
                    "type": "boolean"
                },
                {
                    "$ref": "#"
                }
            ]
        },
        "dependencies": {
            "additionalProperties": {
                "anyOf": [
                    {
                        "$ref": "#"
                    },
                    {
                        "type": "array"
                    }
                ]
            }
        },
        "items": {
            "anyOf": [
                {
                    "$ref": "#"
                },
                {
                    "$ref": "#/definitions/schemaArray"
                }
            ]
        },
        "definitions": {
            "additionalProperties": {
                "$ref": "#"
            }
        },
        "patternProperties": {
            "additionalProperties": {
                "$ref": "#"
            }
        },
        "properties": {
            "additionalProperties": {
                "$ref": "#"
            }
        },
        "allOf": {
            "$ref": "#/definitions/schemaArray"
        },
        "anyOf": {
            "$ref": "#/definitions/schemaArray"
        },
        "oneOf": {
            "$ref": "#/definitions/schemaArray"
        },
        "not": {
            "$ref": "#"
        },

        "links": {
            "type": "array",
            "items": {
                "$ref": "#/definitions/linkDescription"
            }
        },
        "fragmentResolution": {
            "type": "string"
        },
        "media": {
            "type": "object",
            "properties": {
                "type": {
                    "description": "A media type, as described in RFC 2046",
                    "type": "string"
                },
                "binaryEncoding": {
                    "description": "A content encoding scheme, as described in RFC 2045",
                    "type": "string"
                }
            }
        },
        "pathStart": {
            "description": "Instances' URIs must start with this value for this schema to apply to them",
            "type": "string",
            "format": "uri"
        }
    },
    "definitions": {
        "schemaArray": {
            "type": "array",
            "items": {
                "$ref": "#"
            }
        },
        "linkDescription": {
            "title": "Link Description Object",
            "type": "object",
            "required": [ "href", "rel" ],
            "properties": {
                "href": {
                    "description": "a URI template, as defined by RFC 6570, with the addition of the $, ( and ) characters for pre-processing",
                    "type": "string"
                },
                "rel": {
                    "description": "relation to the target resource of the link",
                    "type": "string"
                },
                "title": {
                    "description": "a title for the link",
                    "type": "string"
                },
                "targetSchema": {
                    "description": "JSON Schema describing the link target",
                    "$ref": "#"
                },
                "mediaType": {
                    "description": "media type (as defined by RFC 2046) describing the link target",
                    "type": "string"
                },
                "method": {
                    "description": "method for requesting the target of the link (e.g. for HTTP this might be \"GET\" or \"DELETE\")",
                    "type": "string"
                },
                "encType": {
                    "description": "The media type in which to submit data along with the request",
                    "type": "string",
                    "default": "application/json"
                },
                "schema": {
                    "description": "Schema describing the data to submit along with the request",
                    "$ref": "#"
                }
            }
        }
    }
}


},{}],192:[function(require,module,exports){
module.exports={
    "id": "http://json-schema.org/draft-04/schema#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "Core schema meta-schema",
    "definitions": {
        "schemaArray": {
            "type": "array",
            "minItems": 1,
            "items": { "$ref": "#" }
        },
        "positiveInteger": {
            "type": "integer",
            "minimum": 0
        },
        "positiveIntegerDefault0": {
            "allOf": [ { "$ref": "#/definitions/positiveInteger" }, { "default": 0 } ]
        },
        "simpleTypes": {
            "enum": [ "array", "boolean", "integer", "null", "number", "object", "string" ]
        },
        "stringArray": {
            "type": "array",
            "items": { "type": "string" },
            "minItems": 1,
            "uniqueItems": true
        }
    },
    "type": "object",
    "properties": {
        "id": {
            "type": "string",
            "format": "uri"
        },
        "$schema": {
            "type": "string",
            "format": "uri"
        },
        "title": {
            "type": "string"
        },
        "description": {
            "type": "string"
        },
        "default": {},
        "multipleOf": {
            "type": "number",
            "minimum": 0,
            "exclusiveMinimum": true
        },
        "maximum": {
            "type": "number"
        },
        "exclusiveMaximum": {
            "type": "boolean",
            "default": false
        },
        "minimum": {
            "type": "number"
        },
        "exclusiveMinimum": {
            "type": "boolean",
            "default": false
        },
        "maxLength": { "$ref": "#/definitions/positiveInteger" },
        "minLength": { "$ref": "#/definitions/positiveIntegerDefault0" },
        "pattern": {
            "type": "string",
            "format": "regex"
        },
        "additionalItems": {
            "anyOf": [
                { "type": "boolean" },
                { "$ref": "#" }
            ],
            "default": {}
        },
        "items": {
            "anyOf": [
                { "$ref": "#" },
                { "$ref": "#/definitions/schemaArray" }
            ],
            "default": {}
        },
        "maxItems": { "$ref": "#/definitions/positiveInteger" },
        "minItems": { "$ref": "#/definitions/positiveIntegerDefault0" },
        "uniqueItems": {
            "type": "boolean",
            "default": false
        },
        "maxProperties": { "$ref": "#/definitions/positiveInteger" },
        "minProperties": { "$ref": "#/definitions/positiveIntegerDefault0" },
        "required": { "$ref": "#/definitions/stringArray" },
        "additionalProperties": {
            "anyOf": [
                { "type": "boolean" },
                { "$ref": "#" }
            ],
            "default": {}
        },
        "definitions": {
            "type": "object",
            "additionalProperties": { "$ref": "#" },
            "default": {}
        },
        "properties": {
            "type": "object",
            "additionalProperties": { "$ref": "#" },
            "default": {}
        },
        "patternProperties": {
            "type": "object",
            "additionalProperties": { "$ref": "#" },
            "default": {}
        },
        "dependencies": {
            "type": "object",
            "additionalProperties": {
                "anyOf": [
                    { "$ref": "#" },
                    { "$ref": "#/definitions/stringArray" }
                ]
            }
        },
        "enum": {
            "type": "array",
            "minItems": 1,
            "uniqueItems": true
        },
        "type": {
            "anyOf": [
                { "$ref": "#/definitions/simpleTypes" },
                {
                    "type": "array",
                    "items": { "$ref": "#/definitions/simpleTypes" },
                    "minItems": 1,
                    "uniqueItems": true
                }
            ]
        },
        "format": { "type": "string" },
        "allOf": { "$ref": "#/definitions/schemaArray" },
        "anyOf": { "$ref": "#/definitions/schemaArray" },
        "oneOf": { "$ref": "#/definitions/schemaArray" },
        "not": { "$ref": "#" }
    },
    "dependencies": {
        "exclusiveMaximum": [ "maximum" ],
        "exclusiveMinimum": [ "minimum" ]
    },
    "default": {}
}

},{}],193:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/apiDeclaration.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "required": [ "swaggerVersion", "basePath", "apis" ],
    "properties": {
        "swaggerVersion": { "enum": [ "1.2" ] },
        "apiVersion": { "type": "string" },
        "basePath": {
            "type": "string",
            "format": "uri",
            "pattern": "^https?://"
        },
        "resourcePath": {
            "type": "string",
            "format": "uri",
            "pattern": "^/"
        },
        "apis": {
            "type": "array",
            "items": { "$ref": "#/definitions/apiObject" }
        },
        "models": {
            "type": "object",
            "additionalProperties": {
                "$ref": "modelsObject.json#"
            }
        },
        "produces": { "$ref": "#/definitions/mimeTypeArray" },
        "consumes": { "$ref": "#/definitions/mimeTypeArray" },
        "authorizations": { "$ref": "authorizationObject.json#" }
    },
    "additionalProperties": false,
    "definitions": {
        "apiObject": {
            "type": "object",
            "required": [ "path", "operations" ],
            "properties": {
                "path": {
                    "type": "string",
                    "format": "uri-template",
                    "pattern": "^/"
                },
                "description": { "type": "string" },
                "operations": {
                    "type": "array",
                    "items": { "$ref": "operationObject.json#" }
                }
            },
            "additionalProperties": false
        },
        "mimeTypeArray": {
            "type": "array",
            "items": {
                "type": "string",
                "format": "mime-type"
            },
            "uniqueItems": true
        }
    }
}

},{}],194:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/authorizationObject.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "additionalProperties": {
        "oneOf": [
            {
                "$ref": "#/definitions/basicAuth"
            },
            {
                "$ref": "#/definitions/apiKey"
            },
            {
                "$ref": "#/definitions/oauth2"
            }
        ]
    },
    "definitions": {
        "basicAuth": {
            "required": [ "type" ],
            "properties": {
                "type": { "enum": [ "basicAuth" ] }
            },
            "additionalProperties": false
        },
        "apiKey": {
            "required": [ "type", "passAs", "keyname" ],
            "properties": {
                "type": { "enum": [ "apiKey" ] },
                "passAs": { "enum": [ "header", "query" ] },
                "keyname": { "type": "string" }
            },
            "additionalProperties": false
        },
        "oauth2": {
            "type": "object",
            "required": [ "type", "grantTypes" ],
            "properties": {
                "type": { "enum": [ "oauth2" ] },
                "scopes": {
                    "type": "array",
                    "items": { "$ref": "#/definitions/oauth2Scope" }
                },
                "grantTypes": { "$ref": "oauth2GrantType.json#" }
            },
            "additionalProperties": false
        },
        "oauth2Scope": {
            "type": "object",
            "required": [ "scope" ],
            "properties": {
                "scope": { "type": "string" },
                "description": { "type": "string" }
            },
            "additionalProperties": false
        }
    }
}


},{}],195:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/dataType.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "Data type as described by the specification (version 1.2)",
    "type": "object",
    "oneOf": [
        { "$ref": "#/definitions/refType" },
        { "$ref": "#/definitions/voidType" },
        { "$ref": "#/definitions/primitiveType" },
        { "$ref": "#/definitions/modelType" },
        { "$ref": "#/definitions/arrayType" }
    ],
    "definitions": {
        "refType": {
            "required": [ "$ref" ],
            "properties": {
                "$ref": { "type": "string" }
            },
            "additionalProperties": false
        },
        "voidType": {
            "enum": [ { "type": "void" } ]
        },
        "modelType": {
            "required": [ "type" ],
            "properties": {
                "type": {
                    "type": "string",
                    "not": {
                        "enum": [ "boolean", "integer", "number", "string", "array" ]
                    }
                }
            },
            "additionalProperties": false
        },
        "primitiveType": {
            "required": [ "type" ],
            "properties": {
                "type": {
                    "enum": [ "boolean", "integer", "number", "string" ]
                },
                "format": { "type": "string" },
                "defaultValue": {
                    "not": { "type": [ "array", "object", "null" ] }
                },
                "enum": {
                    "type": "array",
                    "items": { "type": "string" },
                    "minItems": 1,
                    "uniqueItems": true
                },
                "minimum": { "type": "string" },
                "maximum": { "type": "string" }
            },
            "additionalProperties": false,
            "dependencies": {
                "format": {
                    "oneOf": [
                        {
                            "properties": {
                                "type": { "enum": [ "integer" ] },
                                "format": { "enum": [ "int32", "int64" ] }
                            }
                        },
                        {
                            "properties": {
                                "type": { "enum": [ "number" ] },
                                "format": { "enum": [ "float", "double" ] }
                            }
                        },
                        {
                            "properties": {
                                "type": { "enum": [ "string" ] },
                                "format": {
                                    "enum": [ "byte", "date", "date-time" ]
                                }
                            }
                        }
                    ]
                },
                "enum": {
                    "properties": {
                        "type": { "enum": [ "string" ] }
                    }
                },
                "minimum": {
                    "properties": {
                        "type": { "enum": [ "integer", "number" ] }
                    }
                },
                "maximum": {
                    "properties": {
                        "type": { "enum": [ "integer", "number" ] }
                    }
                }
            }
        },
        "arrayType": {
            "required": [ "type", "items" ],
            "properties": {
                "type": { "enum": [ "array" ] },
                "items": {
                    "type": "array",
                    "items": { "$ref": "#/definitions/itemsObject" }
                },
                "uniqueItems": { "type": "boolean" }
            },
            "additionalProperties": false
        },
        "itemsObject": {
            "oneOf": [
                {
                    "$ref": "#/definitions/refType"
                },
                {
                    "allOf": [
                        {
                            "$ref": "#/definitions/primitiveType"
                        },
                        {
                            "properties": {
                                "type": {},
                                "format": {}
                            },
                            "additionalProperties": false
                        }
                    ]
                }
            ]
        }
    }
}
},{}],196:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/dataTypeBase.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "Data type fields (section 4.3.3)",
    "type": "object",
    "oneOf": [
        { "required": [ "type" ] },
        { "required": [ "$ref" ] }
    ],
    "properties": {
        "type": { "type": "string" },
        "$ref": { "type": "string" },
        "format": { "type": "string" },
        "defaultValue": {
            "not": { "type": [ "array", "object", "null" ] }
        },
        "enum": {
            "type": "array",
            "items": { "type": "string" },
            "uniqueItems": true,
            "minItems": 1
        },
        "minimum": { "type": "string" },
        "maximum": { "type": "string" },
        "items": { "$ref": "#/definitions/itemsObject" },
        "uniqueItems": { "type": "boolean" }
    },
    "dependencies": {
        "format": {
            "oneOf": [
                {
                    "properties": {
                        "type": { "enum": [ "integer" ] },
                        "format": { "enum": [ "int32", "int64" ] }
                    }
                },
                {
                    "properties": {
                        "type": { "enum": [ "number" ] },
                        "format": { "enum": [ "float", "double" ] }
                    }
                },
                {
                    "properties": {
                        "type": { "enum": [ "string" ] },
                        "format": {
                            "enum": [ "byte", "date", "date-time" ]
                        }
                    }
                }
            ]
        }
    },
    "definitions": {
        "itemsObject": {
            "oneOf": [
                {
                    "type": "object",
                    "required": [ "$ref" ],
                    "properties": {
                        "$ref": { "type": "string" }
                    },
                    "additionalProperties": false
                },
                {
                    "allOf": [
                        { "$ref": "#" },
                        {
                            "required": [ "type" ],
                            "properties": {
                                "type": {},
                                "format": {}
                            },
                            "additionalProperties": false
                        }
                    ]
                }
            ]
        }
    }
}

},{}],197:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/infoObject.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "info object (section 5.1.3)",
    "type": "object",
    "required": [ "title", "description" ],
    "properties": {
        "title": { "type": "string" },
        "description": { "type": "string" },
        "termsOfServiceUrl": { "type": "string", "format": "uri" },
        "contact": { "type": "string", "format": "email" },
        "license": { "type": "string" },
        "licenseUrl": { "type": "string", "format": "uri" }
    },
    "additionalProperties": false
}
},{}],198:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/modelsObject.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "required": [ "id", "properties" ],
    "properties": {
        "id": { "type": "string" },
        "description": { "type": "string" },
        "properties": {
            "type": "object",
            "additionalProperties": { "$ref": "#/definitions/propertyObject" }
        },
        "subTypes": {
            "type": "array",
            "items": { "type": "string" },
            "uniqueItems": true
        },
        "discriminator": { "type": "string" }
    },
    "dependencies": {
        "subTypes": [ "discriminator" ]
    },
    "definitions": {
        "propertyObject": {
            "allOf": [
                {
                    "not": { "$ref": "#" }
                },
                {
                    "$ref": "dataTypeBase.json#"
                }
            ]
        }
    }
}


},{}],199:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/oauth2GrantType.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "minProperties": 1,
    "properties": {
        "implicit": { "$ref": "#/definitions/implicit" },
        "authorization_code": { "$ref": "#/definitions/authorizationCode" }
    },
    "definitions": {
        "implicit": {
            "type": "object",
            "required": [ "loginEndpoint" ],
            "properties": {
                "loginEndpoint": { "$ref": "#/definitions/loginEndpoint" },
                "tokenName": { "type": "string" }
            },
            "additionalProperties": false
        },
        "authorizationCode": {
            "type": "object",
            "required": [ "tokenEndpoint", "tokenRequestEndpoint" ],
            "properties": {
                "tokenEndpoint": { "$ref": "#/definitions/tokenEndpoint" },
                "tokenRequestEndpoint": { "$ref": "#/definitions/tokenRequestEndpoint" }
            },
            "additionalProperties": false
        },
        "loginEndpoint": {
            "type": "object",
            "required": [ "url" ],
            "properties": {
                "url": { "type": "string", "format": "uri" }
            },
            "additionalProperties": false
        },
        "tokenEndpoint": {
            "type": "object",
            "required": [ "url" ],
            "properties": {
                "url": { "type": "string", "format": "uri" },
                "tokenName": { "type": "string" }
            },
            "additionalProperties": false
        },
        "tokenRequestEndpoint": {
            "type": "object",
            "required": [ "url" ],
            "properties": {
                "url": { "type": "string", "format": "uri" },
                "clientIdName": { "type": "string" },
                "clientSecretName": { "type": "string" }
            },
            "additionalProperties": false
        }
    }
}
},{}],200:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/operationObject.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "allOf": [
        { "$ref": "dataTypeBase.json#" },
        {
            "required": [ "method", "nickname", "parameters" ],
            "properties": {
                "method": { "enum": [ "GET", "HEAD", "POST", "PUT", "PATCH", "DELETE", "OPTIONS" ] },
                "summary": { "type": "string", "maxLength": 120 },
                "notes": { "type": "string" },
                "nickname": {
                    "type": "string",
                    "pattern": "^[a-zA-Z0-9_]+$"
                },
                "authorizations": {
                    "type": "object",
                    "additionalProperties": {
                        "type": "array",
                        "items": {
                            "$ref": "authorizationObject.json#/definitions/oauth2Scope"
                        }
                    }
                },
                "parameters": {
                    "type": "array",
                    "items": { "$ref": "parameterObject.json#" }
                },
                "responseMessages": {
                    "type": "array",
                    "items": { "$ref": "#/definitions/responseMessageObject"}
                },
                "produces": { "$ref": "#/definitions/mimeTypeArray" },
                "consumes": { "$ref": "#/definitions/mimeTypeArray" },
                "deprecated": { "enum": [ "true", "false" ] }
            }
        }
    ],
    "definitions": {
        "responseMessageObject": {
            "type": "object",
            "required": [ "code", "message" ],
            "properties": {
                "code": { "$ref": "#/definitions/rfc2616section10" },
                "message": { "type": "string" },
                "responseModel": { "type": "string" }
            }
        },
        "rfc2616section10": {
            "type": "integer",
            "minimum": 100,
            "maximum": 600,
            "exclusiveMaximum": true
        },
        "mimeTypeArray": {
            "type": "array",
            "items": {
                "type": "string",
                "format": "mime-type"
            },
            "uniqueItems": true
        }
    }
}

},{}],201:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/parameterObject.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "allOf": [
        { "$ref": "dataTypeBase.json#" },
        {
            "required": [ "paramType", "name" ],
            "properties": {
                "paramType": {
                    "enum": [ "path", "query", "body", "header", "form" ]
                },
                "name": { "type": "string" },
                "description": { "type": "string" },
                "required": { "type": "boolean" },
                "allowMultiple": { "type": "boolean" }
            }
        },
        {
            "description": "type File requires special paramType and consumes",
            "oneOf": [
                {
                    "properties": {
                        "type": { "not": { "enum": [ "File" ] } }
                    }
                },
                {
                    "properties": {
                        "type": { "enum": [ "File" ] },
                        "paramType": { "enum": [ "form" ] },
                        "consumes": { "enum": [ "multipart/form-data" ] }
                    }
                }
            ]
        }
    ]
}

},{}],202:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/resourceListing.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "required": [ "swaggerVersion", "apis" ],
    "properties": {
        "swaggerVersion": { "enum": [ "1.2" ] },
        "apis": {
            "type": "array",
            "items": { "$ref": "resourceObject.json#" }
        },
        "apiVersion": { "type": "string" },
        "info": { "$ref": "infoObject.json#" },
        "authorizations": { "$ref": "authorizationObject.json#" }
    }
}

},{}],203:[function(require,module,exports){
module.exports={
    "id": "http://wordnik.github.io/schemas/v1.2/resourceObject.json#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "required": [ "path" ],
    "properties": {
        "path": { "type": "string", "format": "uri" },
        "description": { "type": "string" }
    },
    "additionalProperties": false
}
},{}],204:[function(require,module,exports){
module.exports={
  "title": "A JSON Schema for Swagger 2.0 API.",
  "id": "http://swagger.io/v2/schema.json#",
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "required": [
    "swagger",
    "info",
    "paths"
  ],
  "additionalProperties": false,
  "patternProperties": {
    "^x-": {
      "$ref": "#/definitions/vendorExtension"
    }
  },
  "properties": {
    "swagger": {
      "type": "string",
      "enum": [
        "2.0"
      ],
      "description": "The Swagger version of this document."
    },
    "info": {
      "$ref": "#/definitions/info"
    },
    "host": {
      "type": "string",
      "pattern": "^[^{}/ :\\\\]+(?::\\d+)?$",
      "description": "The host (name or ip) of the API. Example: 'swagger.io'"
    },
    "basePath": {
      "type": "string",
      "pattern": "^/",
      "description": "The base path to the API. Example: '/api'."
    },
    "schemes": {
      "$ref": "#/definitions/schemesList"
    },
    "consumes": {
      "description": "A list of MIME types accepted by the API.",
      "$ref": "#/definitions/mediaTypeList"
    },
    "produces": {
      "description": "A list of MIME types the API can produce.",
      "$ref": "#/definitions/mediaTypeList"
    },
    "paths": {
      "$ref": "#/definitions/paths"
    },
    "definitions": {
      "$ref": "#/definitions/definitions"
    },
    "parameters": {
      "$ref": "#/definitions/parameterDefinitions"
    },
    "responses": {
      "$ref": "#/definitions/responseDefinitions"
    },
    "security": {
      "$ref": "#/definitions/security"
    },
    "securityDefinitions": {
      "$ref": "#/definitions/securityDefinitions"
    },
    "tags": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/tag"
      },
      "uniqueItems": true
    },
    "externalDocs": {
      "$ref": "#/definitions/externalDocs"
    }
  },
  "definitions": {
    "info": {
      "type": "object",
      "description": "General information about the API.",
      "required": [
        "version",
        "title"
      ],
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "title": {
          "type": "string",
          "description": "A unique and precise title of the API."
        },
        "version": {
          "type": "string",
          "description": "A semantic version number of the API."
        },
        "description": {
          "type": "string",
          "description": "A longer description of the API. Should be different from the title.  GitHub Flavored Markdown is allowed."
        },
        "termsOfService": {
          "type": "string",
          "description": "The terms of service for the API."
        },
        "contact": {
          "$ref": "#/definitions/contact"
        },
        "license": {
          "$ref": "#/definitions/license"
        }
      }
    },
    "contact": {
      "type": "object",
      "description": "Contact information for the owners of the API.",
      "additionalProperties": false,
      "properties": {
        "name": {
          "type": "string",
          "description": "The identifying name of the contact person/organization."
        },
        "url": {
          "type": "string",
          "description": "The URL pointing to the contact information.",
          "format": "uri"
        },
        "email": {
          "type": "string",
          "description": "The email address of the contact person/organization.",
          "format": "email"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "license": {
      "type": "object",
      "required": [
        "name"
      ],
      "additionalProperties": false,
      "properties": {
        "name": {
          "type": "string",
          "description": "The name of the license type. It's encouraged to use an OSI compatible license."
        },
        "url": {
          "type": "string",
          "description": "The URL pointing to the license.",
          "format": "uri"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "paths": {
      "type": "object",
      "description": "Relative paths to the individual endpoints. They must be relative to the 'basePath'.",
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        },
        "^/": {
          "$ref": "#/definitions/pathItem"
        }
      },
      "additionalProperties": false
    },
    "definitions": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/schema"
      },
      "description": "One or more JSON objects describing the schemas being consumed and produced by the API."
    },
    "parameterDefinitions": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/parameter"
      },
      "description": "One or more JSON representations for parameters"
    },
    "responseDefinitions": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/response"
      },
      "description": "One or more JSON representations for parameters"
    },
    "externalDocs": {
      "type": "object",
      "additionalProperties": false,
      "description": "information about external documentation",
      "required": [
        "url"
      ],
      "properties": {
        "description": {
          "type": "string"
        },
        "url": {
          "type": "string",
          "format": "uri"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "examples": {
      "type": "object",
      "additionalProperties": true
    },
    "mimeType": {
      "type": "string",
      "description": "The MIME type of the HTTP message."
    },
    "operation": {
      "type": "object",
      "required": [
        "responses"
      ],
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "tags": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "uniqueItems": true
        },
        "summary": {
          "type": "string",
          "description": "A brief summary of the operation."
        },
        "description": {
          "type": "string",
          "description": "A longer description of the operation, GitHub Flavored Markdown is allowed."
        },
        "externalDocs": {
          "$ref": "#/definitions/externalDocs"
        },
        "operationId": {
          "type": "string",
          "description": "A unique identifier of the operation."
        },
        "produces": {
          "description": "A list of MIME types the API can produce.",
          "$ref": "#/definitions/mediaTypeList"
        },
        "consumes": {
          "description": "A list of MIME types the API can consume.",
          "$ref": "#/definitions/mediaTypeList"
        },
        "parameters": {
          "$ref": "#/definitions/parametersList"
        },
        "responses": {
          "$ref": "#/definitions/responses"
        },
        "schemes": {
          "$ref": "#/definitions/schemesList"
        },
        "deprecated": {
          "type": "boolean",
          "default": false
        },
        "security": {
          "$ref": "#/definitions/security"
        }
      }
    },
    "pathItem": {
      "type": "object",
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "$ref": {
          "type": "string"
        },
        "get": {
          "$ref": "#/definitions/operation"
        },
        "put": {
          "$ref": "#/definitions/operation"
        },
        "post": {
          "$ref": "#/definitions/operation"
        },
        "delete": {
          "$ref": "#/definitions/operation"
        },
        "options": {
          "$ref": "#/definitions/operation"
        },
        "head": {
          "$ref": "#/definitions/operation"
        },
        "patch": {
          "$ref": "#/definitions/operation"
        },
        "parameters": {
          "$ref": "#/definitions/parametersList"
        }
      }
    },
    "responses": {
      "type": "object",
      "description": "Response objects names can either be any valid HTTP status code or 'default'.",
      "minProperties": 1,
      "additionalProperties": false,
      "patternProperties": {
        "^([0-9]{3})$|^(default)$": {
          "$ref": "#/definitions/responseValue"
        },
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "not": {
        "type": "object",
        "additionalProperties": false,
        "patternProperties": {
          "^x-": {
            "$ref": "#/definitions/vendorExtension"
          }
        }
      }
    },
    "responseValue": {
      "oneOf": [
        {
          "$ref": "#/definitions/response"
        },
        {
          "$ref": "#/definitions/jsonReference"
        }
      ]
    },
    "response": {
      "type": "object",
      "required": [
        "description"
      ],
      "properties": {
        "description": {
          "type": "string"
        },
        "schema": {
          "oneOf": [
            {
              "$ref": "#/definitions/schema"
            },
            {
              "$ref": "#/definitions/fileSchema"
            }
          ]
        },
        "headers": {
          "$ref": "#/definitions/headers"
        },
        "examples": {
          "$ref": "#/definitions/examples"
        }
      },
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "headers": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/header"
      }
    },
    "header": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "string",
            "number",
            "integer",
            "boolean",
            "array"
          ]
        },
        "format": {
          "type": "string"
        },
        "items": {
          "$ref": "#/definitions/primitivesItems"
        },
        "collectionFormat": {
          "$ref": "#/definitions/collectionFormat"
        },
        "default": {
          "$ref": "#/definitions/default"
        },
        "maximum": {
          "$ref": "#/definitions/maximum"
        },
        "exclusiveMaximum": {
          "$ref": "#/definitions/exclusiveMaximum"
        },
        "minimum": {
          "$ref": "#/definitions/minimum"
        },
        "exclusiveMinimum": {
          "$ref": "#/definitions/exclusiveMinimum"
        },
        "maxLength": {
          "$ref": "#/definitions/maxLength"
        },
        "minLength": {
          "$ref": "#/definitions/minLength"
        },
        "pattern": {
          "$ref": "#/definitions/pattern"
        },
        "maxItems": {
          "$ref": "#/definitions/maxItems"
        },
        "minItems": {
          "$ref": "#/definitions/minItems"
        },
        "uniqueItems": {
          "$ref": "#/definitions/uniqueItems"
        },
        "enum": {
          "$ref": "#/definitions/enum"
        },
        "multipleOf": {
          "$ref": "#/definitions/multipleOf"
        },
        "description": {
          "type": "string"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "vendorExtension": {
      "description": "Any property starting with x- is valid.",
      "additionalProperties": true,
      "additionalItems": true
    },
    "bodyParameter": {
      "type": "object",
      "required": [
        "name",
        "in",
        "schema"
      ],
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "description": {
          "type": "string",
          "description": "A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed."
        },
        "name": {
          "type": "string",
          "description": "The name of the parameter."
        },
        "in": {
          "type": "string",
          "description": "Determines the location of the parameter.",
          "enum": [
            "body"
          ]
        },
        "required": {
          "type": "boolean",
          "description": "Determines whether or not this parameter is required or optional.",
          "default": false
        },
        "schema": {
          "$ref": "#/definitions/schema"
        }
      },
      "additionalProperties": false
    },
    "headerParameterSubSchema": {
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "required": {
          "type": "boolean",
          "description": "Determines whether or not this parameter is required or optional.",
          "default": false
        },
        "in": {
          "type": "string",
          "description": "Determines the location of the parameter.",
          "enum": [
            "header"
          ]
        },
        "description": {
          "type": "string",
          "description": "A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed."
        },
        "name": {
          "type": "string",
          "description": "The name of the parameter."
        },
        "type": {
          "type": "string",
          "enum": [
            "string",
            "number",
            "boolean",
            "integer",
            "array"
          ]
        },
        "format": {
          "type": "string"
        },
        "items": {
          "$ref": "#/definitions/primitivesItems"
        },
        "collectionFormat": {
          "$ref": "#/definitions/collectionFormat"
        },
        "default": {
          "$ref": "#/definitions/default"
        },
        "maximum": {
          "$ref": "#/definitions/maximum"
        },
        "exclusiveMaximum": {
          "$ref": "#/definitions/exclusiveMaximum"
        },
        "minimum": {
          "$ref": "#/definitions/minimum"
        },
        "exclusiveMinimum": {
          "$ref": "#/definitions/exclusiveMinimum"
        },
        "maxLength": {
          "$ref": "#/definitions/maxLength"
        },
        "minLength": {
          "$ref": "#/definitions/minLength"
        },
        "pattern": {
          "$ref": "#/definitions/pattern"
        },
        "maxItems": {
          "$ref": "#/definitions/maxItems"
        },
        "minItems": {
          "$ref": "#/definitions/minItems"
        },
        "uniqueItems": {
          "$ref": "#/definitions/uniqueItems"
        },
        "enum": {
          "$ref": "#/definitions/enum"
        },
        "multipleOf": {
          "$ref": "#/definitions/multipleOf"
        }
      }
    },
    "queryParameterSubSchema": {
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "required": {
          "type": "boolean",
          "description": "Determines whether or not this parameter is required or optional.",
          "default": false
        },
        "in": {
          "type": "string",
          "description": "Determines the location of the parameter.",
          "enum": [
            "query"
          ]
        },
        "description": {
          "type": "string",
          "description": "A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed."
        },
        "name": {
          "type": "string",
          "description": "The name of the parameter."
        },
        "allowEmptyValue": {
          "type": "boolean",
          "default": false,
          "description": "allows sending a parameter by name only or with an empty value."
        },
        "type": {
          "type": "string",
          "enum": [
            "string",
            "number",
            "boolean",
            "integer",
            "array"
          ]
        },
        "format": {
          "type": "string"
        },
        "items": {
          "$ref": "#/definitions/primitivesItems"
        },
        "collectionFormat": {
          "$ref": "#/definitions/collectionFormatWithMulti"
        },
        "default": {
          "$ref": "#/definitions/default"
        },
        "maximum": {
          "$ref": "#/definitions/maximum"
        },
        "exclusiveMaximum": {
          "$ref": "#/definitions/exclusiveMaximum"
        },
        "minimum": {
          "$ref": "#/definitions/minimum"
        },
        "exclusiveMinimum": {
          "$ref": "#/definitions/exclusiveMinimum"
        },
        "maxLength": {
          "$ref": "#/definitions/maxLength"
        },
        "minLength": {
          "$ref": "#/definitions/minLength"
        },
        "pattern": {
          "$ref": "#/definitions/pattern"
        },
        "maxItems": {
          "$ref": "#/definitions/maxItems"
        },
        "minItems": {
          "$ref": "#/definitions/minItems"
        },
        "uniqueItems": {
          "$ref": "#/definitions/uniqueItems"
        },
        "enum": {
          "$ref": "#/definitions/enum"
        },
        "multipleOf": {
          "$ref": "#/definitions/multipleOf"
        }
      }
    },
    "formDataParameterSubSchema": {
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "required": {
          "type": "boolean",
          "description": "Determines whether or not this parameter is required or optional.",
          "default": false
        },
        "in": {
          "type": "string",
          "description": "Determines the location of the parameter.",
          "enum": [
            "formData"
          ]
        },
        "description": {
          "type": "string",
          "description": "A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed."
        },
        "name": {
          "type": "string",
          "description": "The name of the parameter."
        },
        "allowEmptyValue": {
          "type": "boolean",
          "default": false,
          "description": "allows sending a parameter by name only or with an empty value."
        },
        "type": {
          "type": "string",
          "enum": [
            "string",
            "number",
            "boolean",
            "integer",
            "array",
            "file"
          ]
        },
        "format": {
          "type": "string"
        },
        "items": {
          "$ref": "#/definitions/primitivesItems"
        },
        "collectionFormat": {
          "$ref": "#/definitions/collectionFormatWithMulti"
        },
        "default": {
          "$ref": "#/definitions/default"
        },
        "maximum": {
          "$ref": "#/definitions/maximum"
        },
        "exclusiveMaximum": {
          "$ref": "#/definitions/exclusiveMaximum"
        },
        "minimum": {
          "$ref": "#/definitions/minimum"
        },
        "exclusiveMinimum": {
          "$ref": "#/definitions/exclusiveMinimum"
        },
        "maxLength": {
          "$ref": "#/definitions/maxLength"
        },
        "minLength": {
          "$ref": "#/definitions/minLength"
        },
        "pattern": {
          "$ref": "#/definitions/pattern"
        },
        "maxItems": {
          "$ref": "#/definitions/maxItems"
        },
        "minItems": {
          "$ref": "#/definitions/minItems"
        },
        "uniqueItems": {
          "$ref": "#/definitions/uniqueItems"
        },
        "enum": {
          "$ref": "#/definitions/enum"
        },
        "multipleOf": {
          "$ref": "#/definitions/multipleOf"
        }
      }
    },
    "pathParameterSubSchema": {
      "additionalProperties": false,
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "required": [
        "required"
      ],
      "properties": {
        "required": {
          "type": "boolean",
          "enum": [
            true
          ],
          "description": "Determines whether or not this parameter is required or optional."
        },
        "in": {
          "type": "string",
          "description": "Determines the location of the parameter.",
          "enum": [
            "path"
          ]
        },
        "description": {
          "type": "string",
          "description": "A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed."
        },
        "name": {
          "type": "string",
          "description": "The name of the parameter."
        },
        "type": {
          "type": "string",
          "enum": [
            "string",
            "number",
            "boolean",
            "integer",
            "array"
          ]
        },
        "format": {
          "type": "string"
        },
        "items": {
          "$ref": "#/definitions/primitivesItems"
        },
        "collectionFormat": {
          "$ref": "#/definitions/collectionFormat"
        },
        "default": {
          "$ref": "#/definitions/default"
        },
        "maximum": {
          "$ref": "#/definitions/maximum"
        },
        "exclusiveMaximum": {
          "$ref": "#/definitions/exclusiveMaximum"
        },
        "minimum": {
          "$ref": "#/definitions/minimum"
        },
        "exclusiveMinimum": {
          "$ref": "#/definitions/exclusiveMinimum"
        },
        "maxLength": {
          "$ref": "#/definitions/maxLength"
        },
        "minLength": {
          "$ref": "#/definitions/minLength"
        },
        "pattern": {
          "$ref": "#/definitions/pattern"
        },
        "maxItems": {
          "$ref": "#/definitions/maxItems"
        },
        "minItems": {
          "$ref": "#/definitions/minItems"
        },
        "uniqueItems": {
          "$ref": "#/definitions/uniqueItems"
        },
        "enum": {
          "$ref": "#/definitions/enum"
        },
        "multipleOf": {
          "$ref": "#/definitions/multipleOf"
        }
      }
    },
    "nonBodyParameter": {
      "type": "object",
      "required": [
        "name",
        "in",
        "type"
      ],
      "oneOf": [
        {
          "$ref": "#/definitions/headerParameterSubSchema"
        },
        {
          "$ref": "#/definitions/formDataParameterSubSchema"
        },
        {
          "$ref": "#/definitions/queryParameterSubSchema"
        },
        {
          "$ref": "#/definitions/pathParameterSubSchema"
        }
      ]
    },
    "parameter": {
      "oneOf": [
        {
          "$ref": "#/definitions/bodyParameter"
        },
        {
          "$ref": "#/definitions/nonBodyParameter"
        }
      ]
    },
    "schema": {
      "type": "object",
      "description": "A deterministic version of a JSON Schema object.",
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "properties": {
        "$ref": {
          "type": "string"
        },
        "format": {
          "type": "string"
        },
        "title": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/title"
        },
        "description": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/description"
        },
        "default": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/default"
        },
        "multipleOf": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/multipleOf"
        },
        "maximum": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/maximum"
        },
        "exclusiveMaximum": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/exclusiveMaximum"
        },
        "minimum": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/minimum"
        },
        "exclusiveMinimum": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/exclusiveMinimum"
        },
        "maxLength": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveInteger"
        },
        "minLength": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0"
        },
        "pattern": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/pattern"
        },
        "maxItems": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveInteger"
        },
        "minItems": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0"
        },
        "uniqueItems": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/uniqueItems"
        },
        "maxProperties": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveInteger"
        },
        "minProperties": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0"
        },
        "required": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/stringArray"
        },
        "enum": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/enum"
        },
        "additionalProperties": {
          "anyOf": [
            {
              "$ref": "#/definitions/schema"
            },
            {
              "type": "boolean"
            }
          ],
          "default": {}
        },
        "type": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/type"
        },
        "items": {
          "anyOf": [
            {
              "$ref": "#/definitions/schema"
            },
            {
              "type": "array",
              "minItems": 1,
              "items": {
                "$ref": "#/definitions/schema"
              }
            }
          ],
          "default": {}
        },
        "allOf": {
          "type": "array",
          "minItems": 1,
          "items": {
            "$ref": "#/definitions/schema"
          }
        },
        "properties": {
          "type": "object",
          "additionalProperties": {
            "$ref": "#/definitions/schema"
          },
          "default": {}
        },
        "discriminator": {
          "type": "string"
        },
        "readOnly": {
          "type": "boolean",
          "default": false
        },
        "xml": {
          "$ref": "#/definitions/xml"
        },
        "externalDocs": {
          "$ref": "#/definitions/externalDocs"
        },
        "example": {}
      },
      "additionalProperties": false
    },
    "fileSchema": {
      "type": "object",
      "description": "A deterministic version of a JSON Schema object.",
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      },
      "required": [
        "type"
      ],
      "properties": {
        "format": {
          "type": "string"
        },
        "title": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/title"
        },
        "description": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/description"
        },
        "default": {
          "$ref": "http://json-schema.org/draft-04/schema#/properties/default"
        },
        "required": {
          "$ref": "http://json-schema.org/draft-04/schema#/definitions/stringArray"
        },
        "type": {
          "type": "string",
          "enum": [
            "file"
          ]
        },
        "readOnly": {
          "type": "boolean",
          "default": false
        },
        "externalDocs": {
          "$ref": "#/definitions/externalDocs"
        },
        "example": {}
      },
      "additionalProperties": false
    },
    "primitivesItems": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "string",
            "number",
            "integer",
            "boolean",
            "array"
          ]
        },
        "format": {
          "type": "string"
        },
        "items": {
          "$ref": "#/definitions/primitivesItems"
        },
        "collectionFormat": {
          "$ref": "#/definitions/collectionFormat"
        },
        "default": {
          "$ref": "#/definitions/default"
        },
        "maximum": {
          "$ref": "#/definitions/maximum"
        },
        "exclusiveMaximum": {
          "$ref": "#/definitions/exclusiveMaximum"
        },
        "minimum": {
          "$ref": "#/definitions/minimum"
        },
        "exclusiveMinimum": {
          "$ref": "#/definitions/exclusiveMinimum"
        },
        "maxLength": {
          "$ref": "#/definitions/maxLength"
        },
        "minLength": {
          "$ref": "#/definitions/minLength"
        },
        "pattern": {
          "$ref": "#/definitions/pattern"
        },
        "maxItems": {
          "$ref": "#/definitions/maxItems"
        },
        "minItems": {
          "$ref": "#/definitions/minItems"
        },
        "uniqueItems": {
          "$ref": "#/definitions/uniqueItems"
        },
        "enum": {
          "$ref": "#/definitions/enum"
        },
        "multipleOf": {
          "$ref": "#/definitions/multipleOf"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "security": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/securityRequirement"
      },
      "uniqueItems": true
    },
    "securityRequirement": {
      "type": "object",
      "additionalProperties": {
        "type": "array",
        "items": {
          "type": "string"
        },
        "uniqueItems": true
      }
    },
    "xml": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "name": {
          "type": "string"
        },
        "namespace": {
          "type": "string"
        },
        "prefix": {
          "type": "string"
        },
        "attribute": {
          "type": "boolean",
          "default": false
        },
        "wrapped": {
          "type": "boolean",
          "default": false
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "tag": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "name"
      ],
      "properties": {
        "name": {
          "type": "string"
        },
        "description": {
          "type": "string"
        },
        "externalDocs": {
          "$ref": "#/definitions/externalDocs"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "securityDefinitions": {
      "type": "object",
      "additionalProperties": {
        "oneOf": [
          {
            "$ref": "#/definitions/basicAuthenticationSecurity"
          },
          {
            "$ref": "#/definitions/apiKeySecurity"
          },
          {
            "$ref": "#/definitions/oauth2ImplicitSecurity"
          },
          {
            "$ref": "#/definitions/oauth2PasswordSecurity"
          },
          {
            "$ref": "#/definitions/oauth2ApplicationSecurity"
          },
          {
            "$ref": "#/definitions/oauth2AccessCodeSecurity"
          }
        ]
      }
    },
    "basicAuthenticationSecurity": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "basic"
          ]
        },
        "description": {
          "type": "string"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "apiKeySecurity": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type",
        "name",
        "in"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "apiKey"
          ]
        },
        "name": {
          "type": "string"
        },
        "in": {
          "type": "string",
          "enum": [
            "header",
            "query"
          ]
        },
        "description": {
          "type": "string"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "oauth2ImplicitSecurity": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type",
        "flow",
        "authorizationUrl"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "oauth2"
          ]
        },
        "flow": {
          "type": "string",
          "enum": [
            "implicit"
          ]
        },
        "scopes": {
          "$ref": "#/definitions/oauth2Scopes"
        },
        "authorizationUrl": {
          "type": "string",
          "format": "uri"
        },
        "description": {
          "type": "string"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "oauth2PasswordSecurity": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type",
        "flow",
        "tokenUrl"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "oauth2"
          ]
        },
        "flow": {
          "type": "string",
          "enum": [
            "password"
          ]
        },
        "scopes": {
          "$ref": "#/definitions/oauth2Scopes"
        },
        "tokenUrl": {
          "type": "string",
          "format": "uri"
        },
        "description": {
          "type": "string"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "oauth2ApplicationSecurity": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type",
        "flow",
        "tokenUrl"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "oauth2"
          ]
        },
        "flow": {
          "type": "string",
          "enum": [
            "application"
          ]
        },
        "scopes": {
          "$ref": "#/definitions/oauth2Scopes"
        },
        "tokenUrl": {
          "type": "string",
          "format": "uri"
        },
        "description": {
          "type": "string"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "oauth2AccessCodeSecurity": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type",
        "flow",
        "authorizationUrl",
        "tokenUrl"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "oauth2"
          ]
        },
        "flow": {
          "type": "string",
          "enum": [
            "accessCode"
          ]
        },
        "scopes": {
          "$ref": "#/definitions/oauth2Scopes"
        },
        "authorizationUrl": {
          "type": "string",
          "format": "uri"
        },
        "tokenUrl": {
          "type": "string",
          "format": "uri"
        },
        "description": {
          "type": "string"
        }
      },
      "patternProperties": {
        "^x-": {
          "$ref": "#/definitions/vendorExtension"
        }
      }
    },
    "oauth2Scopes": {
      "type": "object",
      "additionalProperties": {
        "type": "string"
      }
    },
    "mediaTypeList": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/mimeType"
      },
      "uniqueItems": true
    },
    "parametersList": {
      "type": "array",
      "description": "The parameters needed to send a valid API call.",
      "additionalItems": false,
      "items": {
        "oneOf": [
          {
            "$ref": "#/definitions/parameter"
          },
          {
            "$ref": "#/definitions/jsonReference"
          }
        ]
      },
      "uniqueItems": true
    },
    "schemesList": {
      "type": "array",
      "description": "The transfer protocol of the API.",
      "items": {
        "type": "string",
        "enum": [
          "http",
          "https",
          "ws",
          "wss"
        ]
      },
      "uniqueItems": true
    },
    "collectionFormat": {
      "type": "string",
      "enum": [
        "csv",
        "ssv",
        "tsv",
        "pipes"
      ],
      "default": "csv"
    },
    "collectionFormatWithMulti": {
      "type": "string",
      "enum": [
        "csv",
        "ssv",
        "tsv",
        "pipes",
        "multi"
      ],
      "default": "csv"
    },
    "title": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/title"
    },
    "description": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/description"
    },
    "default": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/default"
    },
    "multipleOf": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/multipleOf"
    },
    "maximum": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/maximum"
    },
    "exclusiveMaximum": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/exclusiveMaximum"
    },
    "minimum": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/minimum"
    },
    "exclusiveMinimum": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/exclusiveMinimum"
    },
    "maxLength": {
      "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveInteger"
    },
    "minLength": {
      "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0"
    },
    "pattern": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/pattern"
    },
    "maxItems": {
      "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveInteger"
    },
    "minItems": {
      "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0"
    },
    "uniqueItems": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/uniqueItems"
    },
    "enum": {
      "$ref": "http://json-schema.org/draft-04/schema#/properties/enum"
    },
    "jsonReference": {
      "type": "object",
      "required": [
        "$ref"
      ],
      "additionalProperties": false,
      "properties": {
        "$ref": {
          "type": "string"
        }
      }
    }
  }
}
},{}],205:[function(require,module,exports){
module.exports={
    "id": "http://json-schema.org/draft-04/schema#",
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "Core schema meta-schema",
    "definitions": {
        "schemaArray": {
            "type": "array",
            "minItems": 1,
            "items": { "$ref": "#" }
        },
        "positiveInteger": {
            "type": "integer",
            "minimum": 0
        },
        "positiveIntegerDefault0": {
            "allOf": [ { "$ref": "#/definitions/positiveInteger" }, { "default": 0 } ]
        },
        "simpleTypes": {
            "enum": [ "array", "boolean", "integer", "null", "number", "object", "string" ]
        },
        "stringArray": {
            "type": "array",
            "items": { "type": "string" },
            "minItems": 1,
            "uniqueItems": true
        }
    },
    "type": "object",
    "properties": {
        "id": {
            "type": "string",
            "format": "uri"
        },
        "$schema": {
            "type": "string",
            "format": "uri"
        },
        "title": {
            "type": "string"
        },
        "description": {
            "type": "string"
        },
        "default": {},
        "multipleOf": {
            "type": "number",
            "minimum": 0,
            "exclusiveMinimum": true
        },
        "maximum": {
            "type": "number"
        },
        "exclusiveMaximum": {
            "type": "boolean",
            "default": false
        },
        "minimum": {
            "type": "number"
        },
        "exclusiveMinimum": {
            "type": "boolean",
            "default": false
        },
        "maxLength": { "$ref": "#/definitions/positiveInteger" },
        "minLength": { "$ref": "#/definitions/positiveIntegerDefault0" },
        "pattern": {
            "type": "string",
            "format": "regex"
        },
        "additionalItems": {
            "anyOf": [
                { "type": "boolean" },
                { "$ref": "#" }
            ],
            "default": {}
        },
        "items": {
            "anyOf": [
                { "$ref": "#" },
                { "$ref": "#/definitions/schemaArray" }
            ],
            "default": {}
        },
        "maxItems": { "$ref": "#/definitions/positiveInteger" },
        "minItems": { "$ref": "#/definitions/positiveIntegerDefault0" },
        "uniqueItems": {
            "type": "boolean",
            "default": false
        },
        "maxProperties": { "$ref": "#/definitions/positiveInteger" },
        "minProperties": { "$ref": "#/definitions/positiveIntegerDefault0" },
        "required": { "$ref": "#/definitions/stringArray" },
        "additionalProperties": {
            "anyOf": [
                { "type": "boolean" },
                { "$ref": "#" }
            ],
            "default": {}
        },
        "definitions": {
            "type": "object",
            "additionalProperties": { "$ref": "#" },
            "default": {}
        },
        "properties": {
            "type": "object",
            "additionalProperties": { "$ref": "#" },
            "default": {}
        },
        "patternProperties": {
            "type": "object",
            "additionalProperties": { "$ref": "#" },
            "default": {}
        },
        "dependencies": {
            "type": "object",
            "additionalProperties": {
                "anyOf": [
                    { "$ref": "#" },
                    { "$ref": "#/definitions/stringArray" }
                ]
            }
        },
        "enum": {
            "type": "array",
            "minItems": 1,
            "uniqueItems": true
        },
        "type": {
            "anyOf": [
                { "$ref": "#/definitions/simpleTypes" },
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e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2014 Apigee Corporation\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n'use strict';\n\nvar _ = require('lodash');\nvar JsonRefs = require('json-refs');\nvar traverse = require('traverse');\nvar ZSchema = require('z-schema');\n\nvar customJsonSchemaFormats = ['byte', 'double', 'float', 'int32', 'int64', 'mime-type', 'uri-template'];\nvar draft04Json = require('../schemas/json-schema-draft-04.json');\nvar draft04Url = 'http://json-schema.org/draft-04/schema';\nvar specCache = {};\n\nmodule.exports.registerCustomFormats = function (json) {\n  traverse(json).forEach(function () {\n    var name = this.key;\n    var format = this.node;\n\n    if (name === 'format' && _.indexOf(ZSchema.getRegisteredFormats(), format) === -1) {\n      ZSchema.registerFormat(format, function () {\n        return true;\n      });\n    }\n  });\n};\n\nmodule.exports.createJsonValidator = function (schemas) {\n  var validator = new ZSchema({\n    breakOnFirstError: false,\n    reportPathAsArray: true\n  });\n  var result;\n\n  // Add the draft-04 spec\n  validator.setRemoteReference(draft04Url, draft04Json);\n\n  // Swagger uses some unsupported/invalid formats so just make them all pass\n  _.each(customJsonSchemaFormats, function (format) {\n    ZSchema.registerFormat(format, function () {\n      return true;\n    });\n  });\n\n  // Compile and validate the schemas\n  if (!_.isUndefined(schemas)) {\n    result = validator.compileSchema(schemas);\n\n    // If there is an error, it's unrecoverable so just blow the eff up\n    if (result === false) {\n      console.error('JSON Schema file' + (schemas.length > 1 ? 's are' : ' is') + ' invalid:');\n\n      _.each(validator.getLastErrors(), function (err) {\n        console.error('  ' + (_.isArray(err.path) ? JsonRefs.pathToPtr(err.path) : err.path) + ': ' + err.message);\n      });\n\n      throw new Error('Unable to create validator due to invalid JSON Schema');\n    }\n  }\n\n  return validator;\n};\n\nmodule.exports.formatResults = function (results) {\n  if (results) {\n    // Update the results based on its content to indicate success/failure accordingly\n    results = (results.errors.length + results.warnings.length +\n    _.reduce(results.apiDeclarations, function (count, aResult) {\n      if (aResult) {\n        count += aResult.errors.length + aResult.warnings.length;\n      }\n\n      return count;\n    }, 0) > 0) ? results : undefined;\n  }\n\n  return results;\n};\n\nvar getErrorCount = module.exports.getErrorCount = function (results) {\n  var errors = 0;\n\n  if (results) {\n    errors = results.errors.length;\n\n    _.each(results.apiDeclarations, function (adResults) {\n      if (adResults) {\n        errors += adResults.errors.length;\n      }\n    });\n  }\n\n  return errors;\n};\n\nvar coerceVersion = function (version) {\n  // Convert the version to a number (Required for helpers.getSpec)\n  if (version && !_.isString(version)) {\n    version = version.toString();\n\n    // Handle rounding issues (Only required for when Swagger version ends in '.0')\n    if (version.indexOf('.') === -1) {\n      version += '.0';\n    }\n  }\n\n  return version;\n};\n\n/**\n * Returns the proper specification based on the human readable version.\n *\n * @param {string} version - The human readable Swagger version (Ex: 1.2)\n * @param {[boolean=false]} throwError - Throw an error if the version could not be identified\n *\n * @returns the corresponding Swagger Specification object or undefined if there is none\n */\nmodule.exports.getSpec = function (version, throwError) {\n  var spec;\n\n  version = coerceVersion(version);\n  spec = specCache[version];\n\n  if (_.isUndefined(spec)) {\n    switch (version) {\n    case '1.2':\n      spec = require('../lib/specs').v1_2; // jshint ignore:line\n\n      break;\n\n    case '2.0':\n      spec = require('../lib/specs').v2_0; // jshint ignore:line\n\n      break;\n\n    default:\n      if (throwError === true) {\n        throw new Error('Unsupported Swagger version: ' + version);\n      }\n    }\n  }\n\n  return spec;\n};\n\n/**\n * Atempts to figure out the Swagger version from the Swagger document.\n *\n * @param {object} document - The Swagger document\n *\n * @returns the Swagger version or undefined if the document is not a Swagger document\n */\nmodule.exports.getSwaggerVersion = function (document) {\n  return _.isPlainObject(document) ? coerceVersion(document.swaggerVersion || document.swagger) : undefined;\n};\n\nmodule.exports.printValidationResults = function (version, apiDOrSO, apiDeclarations, results, printSummary) {\n  var hasErrors = getErrorCount(results) > 0;\n  var stream = hasErrors ? console.error : console.log;\n  var pluralize = function (string, count) {\n    return count === 1 ? string : string + 's';\n  };\n  var printErrorsOrWarnings = function (header, entries, indent) {\n    if (header) {\n      stream(header + ':');\n      stream();\n    }\n\n    _.each(entries, function (entry) {\n      stream(new Array(indent + 1).join(' ') + JsonRefs.pathToPtr(entry.path) + ': ' + entry.message);\n\n      if (entry.inner) {\n        printErrorsOrWarnings (undefined, entry.inner, indent + 2);\n      }\n    });\n\n    if (header) {\n      stream();\n    }\n  };\n  var errorCount = 0;\n  var warningCount = 0;\n\n  stream();\n\n  if (results.errors.length > 0) {\n    errorCount += results.errors.length;\n\n    printErrorsOrWarnings('API Errors', results.errors, 2);\n  }\n\n  if (results.warnings.length > 0) {\n    warningCount += results.warnings.length;\n\n    printErrorsOrWarnings('API Warnings', results.warnings, 2);\n  }\n\n  if (results.apiDeclarations) {\n    results.apiDeclarations.forEach(function (adResult, index) {\n      if (!adResult) {\n        return;\n      }\n\n      var name = apiDeclarations[index].resourcePath || index;\n\n      if (adResult.errors.length > 0) {\n        errorCount += adResult.errors.length;\n\n        printErrorsOrWarnings('  API Declaration (' + name + ') Errors', adResult.errors, 4);\n      }\n\n      if (adResult.warnings.length > 0) {\n        warningCount += adResult.warnings.length;\n\n        printErrorsOrWarnings('  API Declaration (' + name + ') Warnings', adResult.warnings, 4);\n      }\n    });\n  }\n\n  if (printSummary) {\n    if (errorCount > 0) {\n      stream(errorCount + ' ' + pluralize('error', errorCount) + ' and ' + warningCount + ' ' +\n                    pluralize('warning', warningCount));\n    } else {\n      stream('Validation succeeded but with ' + warningCount + ' ' + pluralize('warning', warningCount));\n    }\n  }\n\n  stream();\n};\n\nmodule.exports.swaggerOperationMethods = [\n  'DELETE',\n  'GET',\n  'HEAD',\n  'OPTIONS',\n  'PATCH',\n  'POST',\n  'PUT'\n];\n","/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2014 Apigee Corporation\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n'use strict';\n\nvar _ = require('lodash');\nvar async = require('async');\nvar helpers = require('./helpers');\nvar JsonRefs = require('json-refs');\nvar SparkMD5 = require('spark-md5');\nvar swaggerConverter = require('swagger-converter');\nvar traverse = require('traverse');\nvar validators = require('./validators');\nvar YAML = require('js-yaml');\n\n// Work around swagger-converter packaging issue (Browser builds only)\nif (_.isPlainObject(swaggerConverter)) {\n  swaggerConverter = global.SwaggerConverter.convert;\n}\n\nvar documentCache = {};\n\nvar sanitizeRef = function (version, ref) {\n  return version !== '1.2' ? ref : ref.replace('#/models/', '');\n};\n\nvar swagger1RefPreProcesor = function (obj) {\n  var pObj = _.cloneDeep(obj);\n\n  pObj.$ref = '#/models/' + obj.$ref;\n\n  return pObj;\n};\nvar validOptionNames = _.map(helpers.swaggerOperationMethods, function (method) {\n  return method.toLowerCase();\n});\n\nvar isRemotePtr = function (refDetails) {\n  return ['relative', 'remote'].indexOf(refDetails.type) > -1;\n};\n\nvar createErrorOrWarning = function (code, message, path, dest) {\n  dest.push({\n    code: code,\n    message: message,\n    path: path\n  });\n};\n\nvar addReference = function (cacheEntry, defPathOrPtr, refPathOrPtr, results, omitError) {\n  var result = true;\n  var swaggerVersion = helpers.getSwaggerVersion(cacheEntry.resolved);\n  var defPath = _.isArray(defPathOrPtr) ? defPathOrPtr : JsonRefs.pathFromPtr(defPathOrPtr);\n  var defPtr = _.isArray(defPathOrPtr) ? JsonRefs.pathToPtr(defPathOrPtr) : defPathOrPtr;\n  var refPath = _.isArray(refPathOrPtr) ? refPathOrPtr : JsonRefs.pathFromPtr(refPathOrPtr);\n  var refPtr = _.isArray(refPathOrPtr) ? JsonRefs.pathToPtr(refPathOrPtr) : refPathOrPtr;\n  var code;\n  var def;\n  var displayId;\n  var i;\n  var msgPrefix;\n  var type;\n\n  def = cacheEntry.definitions[defPtr];\n  type = defPath[0];\n  code = type === 'securityDefinitions' ?\n    'SECURITY_DEFINITION' :\n    type.substring(0, type.length - 1).toUpperCase();\n  displayId = swaggerVersion === '1.2' ? defPath[defPath.length - 1] : defPtr;\n  msgPrefix = type === 'securityDefinitions' ?\n    'Security definition' :\n    code.charAt(0) + code.substring(1).toLowerCase();\n\n  // This is an authorization scope reference\n  if (['authorizations', 'securityDefinitions'].indexOf(defPath[0]) > -1 && defPath[2] === 'scopes') {\n    code += '_SCOPE';\n    msgPrefix += ' scope';\n  }\n\n  // If the reference was not found and this is not an authorization/security scope reference, attempt to find a\n  // parent object to add the reference too.  (Issue 176)\n  if (_.isUndefined(def) && ['AUTHORIZATION_SCOPE', 'SECURITY_DEFINITION_SCOPE'].indexOf(code) === -1) {\n    // Attempt to find the definition in case the reference is to a path within a definition`\n    for (i = 1; i < defPath.length; i++) {\n      var pPath = defPath.slice(0, defPath.length - i);\n      var pPtr = JsonRefs.pathToPtr(pPath);\n      var pDef = cacheEntry.definitions[pPtr];\n\n      if (!_.isUndefined(pDef)) {\n        def = pDef;\n\n        break;\n      }\n    }\n  }\n\n  if (_.isUndefined(def)) {\n    if (!omitError) {\n      if (cacheEntry.swaggerVersion !== '1.2' && ['SECURITY_DEFINITION', 'SECURITY_DEFINITION_SCOPE'].indexOf(code) === -1) {\n        refPath.push('$ref');\n      }\n\n      createErrorOrWarning('UNRESOLVABLE_' + code, msgPrefix + ' could not be resolved: ' + displayId, refPath,\n                           results.errors);\n    }\n\n    result = false;\n  } else {\n    if (_.isUndefined(def.references)) {\n      def.references = [];\n    }\n\n    def.references.push(refPtr);\n  }\n\n  return result;\n};\n\nvar getOrComposeSchema = function (documentMetadata, modelId) {\n  var title = 'Composed ' + (documentMetadata.swaggerVersion === '1.2' ?\n                               JsonRefs.pathFromPtr(modelId).pop() :\n                               modelId);\n  var metadata = documentMetadata.definitions[modelId];\n  var originalT = traverse(documentMetadata.original);\n  var resolvedT = traverse(documentMetadata.resolved);\n  var composed;\n  var original;\n\n  if (!metadata) {\n    return undefined;\n  }\n\n  original = _.cloneDeep(originalT.get(JsonRefs.pathFromPtr(modelId)));\n  composed = _.cloneDeep(resolvedT.get(JsonRefs.pathFromPtr(modelId)));\n\n  // Convert the Swagger 1.2 document to a valid JSON Schema file\n  if (documentMetadata.swaggerVersion === '1.2') {\n    // Create inheritance model\n    if (metadata.lineage.length > 0) {\n      composed.allOf = [];\n\n      _.each(metadata.lineage, function (modelId) {\n        composed.allOf.push(getOrComposeSchema(documentMetadata, modelId));\n      });\n    }\n\n    // Remove the subTypes property\n    delete composed.subTypes;\n\n    _.each(composed.properties, function (property, name) {\n      var oProp = original.properties[name];\n\n      // Convert the string values to numerical values\n      _.each(['maximum', 'minimum'], function (prop) {\n        if (_.isString(property[prop])) {\n          property[prop] = parseFloat(property[prop]);\n        }\n      });\n\n      _.each(JsonRefs.findRefs(oProp, {\n        includeInvalid: true,\n        refPreProcessor: swagger1RefPreProcesor\n      }), function (refDetails, refPtr) {\n        var dMetadata = documentMetadata.definitions[refDetails.uri];\n        var path = JsonRefs.pathFromPtr(refPtr);\n\n        if (dMetadata.lineage.length > 0) {\n          traverse(property).set(path, getOrComposeSchema(documentMetadata, refDetails.uri));\n        } else {\n          traverse(property).set(path.concat('title'), 'Composed ' + sanitizeRef(documentMetadata.swaggerVersion,\n                                                                                 refDetails.uri));\n        }\n      });\n    });\n  }\n\n  // Scrub id properties\n  composed = traverse(composed).map(function (val) {\n    if (this.key === 'id' && _.isString(val)) {\n      this.remove();\n    }\n  });\n\n  composed.title = title;\n\n  return composed;\n};\n\nvar createUnusedErrorOrWarning = function (val, codeSuffix, msgPrefix, path, dest) {\n  createErrorOrWarning('UNUSED_' + codeSuffix, msgPrefix + ' is defined but is not used: ' + val, path, dest);\n};\n\nvar getDocumentCache = function (apiDOrSO) {\n  var key = SparkMD5.hash(JSON.stringify(apiDOrSO));\n  var cacheEntry = documentCache[key] || _.find(documentCache, function (cacheEntry) {\n    return cacheEntry.resolvedId === key;\n  });\n\n  if (!cacheEntry) {\n    cacheEntry = documentCache[key] = {\n      definitions: {},\n      original: apiDOrSO,\n      resolved: undefined,\n      swaggerVersion: helpers.getSwaggerVersion(apiDOrSO)\n    };\n  }\n\n  return cacheEntry;\n};\n\nvar handleValidationError = function (results, callback) {\n  var err = new Error('The Swagger document(s) are invalid');\n\n  err.errors = results.errors;\n  err.failedValidation = true;\n  err.warnings = results.warnings;\n\n  if (results.apiDeclarations) {\n    err.apiDeclarations = results.apiDeclarations;\n  }\n\n  callback(err);\n};\n\nvar normalizePath = function (path) {\n  var matches = path.match(/\\{(.*?)\\}/g);\n  var argNames = [];\n  var normPath = path;\n\n  if (matches) {\n    _.each(matches, function (match, index) {\n      normPath = normPath.replace(match, '{' + index + '}');\n      argNames.push(match.replace(/[{}]/g, ''));\n    });\n  }\n\n  return {\n    path: normPath,\n    args: argNames\n  };\n};\n\nvar removeCirculars = function (obj) {\n  function walk (ancestors, node, path) {\n    function walkItem (item, segment) {\n      path.push(segment);\n      walk(ancestors, item, path);\n      path.pop();\n    }\n\n    // We do not process circular objects again\n    if (ancestors.indexOf(node) === -1) {\n      ancestors.push(node);\n\n      if (_.isArray(node)) {\n        _.each(node, function (member, index) {\n          walkItem(member, index.toString());\n        });\n      } else if (_.isPlainObject(node)) {\n        _.forOwn(node, function (member, key) {\n          walkItem(member, key.toString());\n        });\n      }\n    } else {\n      _.set(obj, path, {});\n    }\n\n    ancestors.pop();\n  }\n\n  walk([], obj, []);\n};\n\n\nvar validateNoExist = function (data, val, codeSuffix, msgPrefix, path, dest) {\n  if (!_.isUndefined(data) && data.indexOf(val) > -1) {\n    createErrorOrWarning('DUPLICATE_' + codeSuffix, msgPrefix + ' already defined: ' + val, path, dest);\n  }\n};\n\nvar validateSchemaConstraints = function (documentMetadata, schema, path, results, skip) {\n  try {\n    validators.validateSchemaConstraints(documentMetadata.swaggerVersion, schema, path, undefined);\n  } catch (err) {\n    if (!skip) {\n      createErrorOrWarning(err.code, err.message, err.path, results.errors);\n    }\n  }\n};\n\nvar processDocument = function (documentMetadata, results) {\n  var swaggerVersion = documentMetadata.swaggerVersion;\n  var getDefinitionMetadata = function (defPath, inline) {\n    var defPtr = JsonRefs.pathToPtr(defPath);\n    var metadata = documentMetadata.definitions[defPtr];\n\n    if (!metadata) {\n      metadata = documentMetadata.definitions[defPtr] = {\n        inline: inline || false,\n        references: []\n      };\n\n      // For model definitions, add the inheritance properties\n      if (['definitions', 'models'].indexOf(JsonRefs.pathFromPtr(defPtr)[0]) > -1) {\n        metadata.cyclical = false;\n        metadata.lineage = undefined;\n        metadata.parents = [];\n      }\n    }\n\n    return metadata;\n  };\n  var getDisplayId = function (id) {\n    return swaggerVersion === '1.2' ? JsonRefs.pathFromPtr(id).pop() : id;\n  };\n  var jsonRefsOptions = {\n    filter: 'local',\n    includeInvalid: true\n  };\n  var walk = function (root, id, lineage) {\n    var definition = documentMetadata.definitions[id || root];\n\n    if (definition) {\n      _.each(definition.parents, function (parent) {\n        lineage.push(parent);\n\n        if (root !== parent) {\n          walk(root, parent, lineage);\n        }\n      });\n    }\n  };\n  var authDefsProp = swaggerVersion === '1.2' ? 'authorizations' : 'securityDefinitions';\n  var modelDefsProp = swaggerVersion === '1.2' ? 'models' : 'definitions';\n\n  // Process authorization definitions\n  _.each(documentMetadata.resolved[authDefsProp], function (authorization, name) {\n    var securityDefPath = [authDefsProp, name];\n\n    // Swagger 1.2 only has authorization definitions in the Resource Listing\n    if (swaggerVersion === '1.2' && !authorization.type) {\n      return;\n    }\n\n    // Create the authorization definition metadata\n    getDefinitionMetadata(securityDefPath);\n\n    _.reduce(authorization.scopes, function (seenScopes, scope, indexOrName) {\n      var scopeName = swaggerVersion === '1.2' ? scope.scope : indexOrName;\n      var scopeDefPath = securityDefPath.concat(['scopes', indexOrName.toString()]);\n      var scopeMetadata = getDefinitionMetadata(securityDefPath.concat(['scopes', scopeName]));\n\n      scopeMetadata.scopePath = scopeDefPath;\n\n      // Identify duplicate authorization scope defined in the Resource Listing\n      validateNoExist(seenScopes, scopeName, 'AUTHORIZATION_SCOPE_DEFINITION', 'Authorization scope definition',\n                      swaggerVersion === '1.2' ? scopeDefPath.concat('scope') : scopeDefPath, results.warnings);\n\n      seenScopes.push(scopeName);\n\n      return seenScopes;\n    }, []);\n  });\n\n  // Process model definitions\n  _.each(documentMetadata.resolved[modelDefsProp], function (model, modelId) {\n    var modelDefPath = [modelDefsProp, modelId];\n    var modelMetadata = getDefinitionMetadata(modelDefPath);\n\n    // Identify model id mismatch (Id in models object is not the same as the model's id in the models object)\n    if (swaggerVersion === '1.2' && modelId !== model.id) {\n      createErrorOrWarning('MODEL_ID_MISMATCH', 'Model id does not match id in models object: ' + model.id,\n                           modelDefPath.concat('id'), results.errors);\n    }\n\n    // Do not reprocess parents/references if already processed\n    if (_.isUndefined(modelMetadata.lineage)) {\n      // Handle inheritance references\n      switch (swaggerVersion) {\n      case '1.2':\n        _.each(model.subTypes, function (subType, index) {\n          var subPath = ['models', subType];\n          var subPtr = JsonRefs.pathToPtr(subPath);\n          var subMetadata = documentMetadata.definitions[subPtr];\n          var refPath = modelDefPath.concat(['subTypes', index.toString()]);\n\n          // If the metadata does not yet exist, create it\n          if (!subMetadata && documentMetadata.resolved[modelDefsProp][subType]) {\n            subMetadata = getDefinitionMetadata(subPath);\n          }\n\n          // If the reference is valid, add the parent\n          if (addReference(documentMetadata, subPath, refPath, results)) {\n            subMetadata.parents.push(JsonRefs.pathToPtr(modelDefPath));\n          }\n        });\n\n        break;\n\n      default:\n        _.each(documentMetadata.original[modelDefsProp][modelId].allOf, function (schema, index) {\n          var isInline = false;\n          var parentPath;\n\n          if (_.isUndefined(schema.$ref) || isRemotePtr(JsonRefs.getRefDetails(schema))) {\n            isInline = true;\n            parentPath = modelDefPath.concat(['allOf', index.toString()]);\n          } else {\n            parentPath = JsonRefs.pathFromPtr(schema.$ref);\n          }\n\n          // If the parent model does not exist, do not create its metadata\n          if (!_.isUndefined(traverse(documentMetadata.resolved).get(parentPath))) {\n            // Create metadata for parent\n            getDefinitionMetadata(parentPath, isInline);\n\n            modelMetadata.parents.push(JsonRefs.pathToPtr(parentPath));\n          }\n        });\n\n        break;\n      }\n    }\n  });\n\n  switch (swaggerVersion) {\n  case '2.0':\n    // Process parameter definitions\n    _.each(documentMetadata.resolved.parameters, function (parameter, name) {\n      var path = ['parameters', name];\n\n      getDefinitionMetadata(path);\n\n      validateSchemaConstraints(documentMetadata, parameter, path, results);\n    });\n\n    // Process response definitions\n    _.each(documentMetadata.resolved.responses, function (response, name) {\n      var path = ['responses', name];\n\n      getDefinitionMetadata(path);\n\n      validateSchemaConstraints(documentMetadata, response, path, results);\n    });\n\n    break;\n  }\n\n  // Validate definition/models (Inheritance, property definitions, ...)\n  _.each(documentMetadata.definitions, function (metadata, id) {\n    var defPath = JsonRefs.pathFromPtr(id);\n    var definition = traverse(documentMetadata.original).get(defPath);\n    var defProp = defPath[0];\n    var code = defProp.substring(0, defProp.length - 1).toUpperCase();\n    var msgPrefix = code.charAt(0) + code.substring(1).toLowerCase();\n    var dProperties;\n    var iProperties;\n    var lineage;\n\n    // The only checks we perform below are inheritance checks so skip all non-model definitions\n    if (['definitions', 'models'].indexOf(defProp) === -1) {\n      return;\n    }\n\n    dProperties = [];\n    iProperties = [];\n    lineage = metadata.lineage;\n\n    // Do not reprocess lineage if already processed\n    if (_.isUndefined(lineage)) {\n      lineage = [];\n\n      walk(id, undefined, lineage);\n\n      // Root > next > ...\n      lineage.reverse();\n\n      metadata.lineage = _.cloneDeep(lineage);\n\n      metadata.cyclical = lineage.length > 1 && lineage[0] === id;\n    }\n\n    // Swagger 1.2 does not allow multiple inheritance while Swagger 2.0+ does\n    if (metadata.parents.length > 1 && swaggerVersion === '1.2') {\n      createErrorOrWarning('MULTIPLE_' + code + '_INHERITANCE',\n                           'Child ' + code.toLowerCase() + ' is sub type of multiple models: ' +\n                           _.map(metadata.parents, function (parent) {\n                             return getDisplayId(parent);\n                           }).join(' && '), defPath, results.errors);\n    }\n\n    if (metadata.cyclical) {\n      createErrorOrWarning('CYCLICAL_' + code + '_INHERITANCE',\n                           msgPrefix + ' has a circular inheritance: ' +\n                             _.map(lineage, function (dep) {\n                               return getDisplayId(dep);\n                             }).join(' -> ') + ' -> ' + getDisplayId(id),\n                            defPath.concat(swaggerVersion === '1.2' ? 'subTypes' : 'allOf'), results.errors);\n    }\n\n    // Remove self reference from the end of the lineage (Front too if cyclical)\n    _.each(lineage.slice(metadata.cyclical ? 1 : 0), function (id) {\n      var pModel = traverse(documentMetadata.resolved).get(JsonRefs.pathFromPtr(id));\n\n      _.each(Object.keys(pModel.properties || {}), function (name) {\n        if (iProperties.indexOf(name) === -1) {\n          iProperties.push(name);\n        }\n      });\n    });\n\n    // Validate simple definitions\n    validateSchemaConstraints(documentMetadata, definition, defPath, results);\n\n    // Identify redeclared properties\n    _.each(definition.properties, function (property, name) {\n      var pPath = defPath.concat(['properties', name]);\n\n      // Do not process unresolved properties\n      if (!_.isUndefined(property)) {\n        validateSchemaConstraints(documentMetadata, property, pPath, results);\n\n        if (iProperties.indexOf(name) > -1) {\n          createErrorOrWarning('CHILD_' + code + '_REDECLARES_PROPERTY',\n                               'Child ' + code.toLowerCase() + ' declares property already declared by ancestor: ' +\n                               name,\n                               pPath, results.errors);\n        } else {\n          dProperties.push(name);\n        }\n      }\n    });\n\n    // Identify missing required properties\n    _.each(definition.required || [], function (name, index) {\n      var type = swaggerVersion === '1.2' ? 'Model' : 'Definition';\n\n      if (iProperties.indexOf(name) === -1 && dProperties.indexOf(name) === -1) {\n        createErrorOrWarning('MISSING_REQUIRED_' + type.toUpperCase() + '_PROPERTY',\n                             type + ' requires property but it is not defined: ' + name,\n                             defPath.concat(['required', index.toString()]), results.errors);\n      }\n    });\n  });\n\n  if (documentMetadata.swaggerVersion === '1.2') {\n    jsonRefsOptions.refPreProcessor = swagger1RefPreProcesor;\n  }\n\n  // Process local references\n  _.each(JsonRefs.findRefs(documentMetadata.original, jsonRefsOptions), function (refDetails, refPtr) {\n    addReference(documentMetadata, refDetails.uri, refPtr, results);\n  });\n\n  // Process invalid references\n  _.each(documentMetadata.referencesMetadata, function (refDetails, refPtr) {\n    if (isRemotePtr(refDetails) && refDetails.missing === true) {\n      results.errors.push({\n        code: 'UNRESOLVABLE_REFERENCE',\n        message: 'Reference could not be resolved: ' + sanitizeRef(documentMetadata.swaggerVersion, refDetails.uri),\n        path: JsonRefs.pathFromPtr(refPtr).concat('$ref')\n      });\n    }\n  });\n};\n\nvar validateExist = function (data, val, codeSuffix, msgPrefix, path, dest) {\n  if (!_.isUndefined(data) && data.indexOf(val) === -1) {\n    createErrorOrWarning('UNRESOLVABLE_' + codeSuffix, msgPrefix + ' could not be resolved: ' + val, path, dest);\n  }\n};\n\nvar processAuthRefs = function (documentMetadata, authRefs, path, results) {\n  var code = documentMetadata.swaggerVersion === '1.2' ? 'AUTHORIZATION' : 'SECURITY_DEFINITION';\n  var msgPrefix = code === 'AUTHORIZATION' ? 'Authorization' : 'Security definition';\n\n  if (documentMetadata.swaggerVersion === '1.2') {\n    _.reduce(authRefs, function (seenNames, scopes, name) {\n      var authPtr = ['authorizations', name];\n      var aPath = path.concat([name]);\n\n      // Add reference or record unresolved authorization\n      if (addReference(documentMetadata, authPtr, aPath, results)) {\n        _.reduce(scopes, function (seenScopes, scope, index) {\n          var sPath = aPath.concat(index.toString(), 'scope');\n          var sPtr = authPtr.concat(['scopes', scope.scope]);\n\n          validateNoExist(seenScopes, scope.scope, code + '_SCOPE_REFERENCE', msgPrefix + ' scope reference', sPath,\n                          results.warnings);\n\n          // Add reference or record unresolved authorization scope\n          addReference(documentMetadata, sPtr, sPath, results);\n\n          return seenScopes.concat(scope.scope);\n        }, []);\n      }\n\n      return seenNames.concat(name);\n    }, []);\n  } else {\n    _.reduce(authRefs, function (seenNames, scopes, index) {\n      _.each(scopes, function (scopes, name) {\n        var authPtr = ['securityDefinitions', name];\n        var authRefPath = path.concat(index.toString(), name);\n\n        // Ensure the security definition isn't referenced more than once (Swagger 2.0+)\n        validateNoExist(seenNames, name, code + '_REFERENCE', msgPrefix + ' reference', authRefPath,\n                        results.warnings);\n\n        seenNames.push(name);\n\n        // Add reference or record unresolved authorization\n        if (addReference(documentMetadata, authPtr, authRefPath, results)) {\n          _.each(scopes, function (scope, index) {\n            // Add reference or record unresolved authorization scope\n            var sPtr = authPtr.concat(['scopes', scope]);\n            addReference(documentMetadata, sPtr, authRefPath.concat(index.toString()),\n                         results);\n          });\n        }\n      });\n\n      return seenNames;\n    }, []);\n  }\n};\n\nvar resolveRefs = function (apiDOrSO, callback) {\n  var cacheEntry = getDocumentCache(apiDOrSO);\n  var swaggerVersion = helpers.getSwaggerVersion(apiDOrSO);\n  var jsonRefsOptions = {\n    includeInvalid: true,\n    loaderOptions: {\n      processContent: function (res, callback) {\n        callback(undefined, YAML.safeLoad(res.text));\n      }\n    }\n  };\n\n  if (!cacheEntry.resolved) {\n    // For Swagger 1.2, we have to create real JSON References\n    if (swaggerVersion === '1.2') {\n      jsonRefsOptions.refPreProcessor = swagger1RefPreProcesor;\n    }\n\n    // Resolve references\n    JsonRefs.resolveRefs(apiDOrSO, jsonRefsOptions)\n      .then(function (results) {\n        removeCirculars(results.resolved);\n\n        // Fix circular references\n        _.each(results.refs, function (refDetails, refPtr) {\n          if (refDetails.circular) {\n            _.set(results.resolved, JsonRefs.pathFromPtr(refPtr), {});\n          }\n        });\n\n        cacheEntry.referencesMetadata = results.refs;\n        cacheEntry.resolved = results.resolved;\n        cacheEntry.resolvedId = SparkMD5.hash(JSON.stringify(results.resolved));\n\n        callback();\n      })\n      .catch(callback);\n  } else {\n    callback();\n  }\n};\n\nvar validateAgainstSchema = function (spec, schemaOrName, data, callback) {\n  var validator = _.isString(schemaOrName) ? spec.validators[schemaOrName] : helpers.createJsonValidator();\n\n  helpers.registerCustomFormats(data);\n\n  try {\n    validators.validateAgainstSchema(schemaOrName, data, validator);\n  } catch (err) {\n    if (err.failedValidation) {\n      return callback(undefined, err.results);\n    } else {\n      return callback(err);\n    }\n  }\n\n  resolveRefs(data, function (err) {\n    return callback(err);\n  });\n};\n\nvar validateDefinitions = function (documentMetadata, results) {\n  // Validate unused definitions\n  _.each(documentMetadata.definitions, function (metadata, id) {\n    var defPath = JsonRefs.pathFromPtr(id);\n    var defType = defPath[0].substring(0, defPath[0].length - 1);\n    var displayId = documentMetadata.swaggerVersion === '1.2' ? defPath[defPath.length - 1] : id;\n    var code = defType === 'securityDefinition' ? 'SECURITY_DEFINITION' : defType.toUpperCase();\n    var msgPrefix = defType === 'securityDefinition' ?\n                             'Security definition' :\n                             defType.charAt(0).toUpperCase() + defType.substring(1);\n\n    if (metadata.references.length === 0 && !metadata.inline) {\n      // Swagger 1.2 authorization scope\n      if (metadata.scopePath) {\n        code += '_SCOPE';\n        msgPrefix += ' scope';\n        defPath = metadata.scopePath;\n      }\n\n      createUnusedErrorOrWarning(displayId, code, msgPrefix, defPath, results.warnings);\n    }\n  });\n};\n\nvar validateParameters = function (spec, documentMetadata, nPath, parameters, path, results,\n                                   skipMissing) {\n  var createParameterComboError = function (path) {\n    createErrorOrWarning('INVALID_PARAMETER_COMBINATION',\n                         'API cannot have a a body parameter and a ' +\n                           (spec.version === '1.2' ? 'form' : 'formData') + ' parameter',\n                         path, results.errors);\n  };\n  var pathParams = [];\n  var seenBodyParam = false;\n  var seenFormParam = false;\n\n  _.reduce(parameters, function (seenParameters, parameter, index) {\n    var pPath = path.concat(['parameters', index.toString()]);\n\n    // Unresolved parameter\n    if (_.isUndefined(parameter)) {\n      return;\n    }\n\n    // Identify duplicate parameter names\n    validateNoExist(seenParameters, parameter.name, 'PARAMETER', 'Parameter', pPath.concat('name'),\n                    results.errors);\n\n    // Keep track of body and path parameters\n    if (parameter.paramType === 'body' || parameter.in === 'body') {\n      if (seenBodyParam === true) {\n        createErrorOrWarning('DUPLICATE_API_BODY_PARAMETER', 'API has more than one body parameter', pPath,\n                             results.errors);\n      } else if (seenFormParam === true) {\n        createParameterComboError(pPath);\n      }\n\n      seenBodyParam = true;\n    } else if (parameter.paramType === 'form' || parameter.in === 'formData') {\n      if (seenBodyParam === true) {\n        createParameterComboError(pPath);\n      }\n\n      seenFormParam = true;\n    } else if (parameter.paramType === 'path' || parameter.in === 'path') {\n      if (nPath.args.indexOf(parameter.name) === -1) {\n        createErrorOrWarning('UNRESOLVABLE_API_PATH_PARAMETER',\n                             'API path parameter could not be resolved: ' + parameter.name, pPath.concat('name'),\n                             results.errors);\n      }\n\n      pathParams.push(parameter.name);\n    }\n\n    if (spec.primitives.indexOf(parameter.type) === -1 && spec.version === '1.2') {\n      addReference(documentMetadata, '#/models/' + parameter.type, pPath.concat('type'), results);\n    }\n\n    // Validate parameter constraints\n    validateSchemaConstraints(documentMetadata, parameter, pPath, results, parameter.skipErrors);\n\n    return seenParameters.concat(parameter.name);\n  }, []);\n\n  // Validate missing path parameters (in path but not in operation.parameters)\n  if (_.isUndefined(skipMissing) || skipMissing === false) {\n    _.each(_.difference(nPath.args, pathParams), function (unused) {\n      createErrorOrWarning('MISSING_API_PATH_PARAMETER', 'API requires path parameter but it is not defined: ' + unused,\n                           documentMetadata.swaggerVersion === '1.2' ? path.slice(0, 2).concat('path') : path,\n                           results.errors);\n    });\n  }\n};\n\nvar validateSwagger1_2 = function (spec, resourceListing, apiDeclarations, callback) { // jshint ignore:line\n  var adResourcePaths = [];\n  var rlDocumentMetadata = getDocumentCache(resourceListing);\n  var rlResourcePaths = [];\n  var results = {\n    errors: [],\n    warnings: [],\n    apiDeclarations: []\n  };\n\n  // Process Resource Listing resource definitions\n  rlResourcePaths = _.reduce(resourceListing.apis, function (seenPaths, api, index) {\n    // Identify duplicate resource paths defined in the Resource Listing\n    validateNoExist(seenPaths, api.path, 'RESOURCE_PATH', 'Resource path', ['apis', index.toString(), 'path'],\n                    results.errors);\n\n    seenPaths.push(api.path);\n\n    return seenPaths;\n  }, []);\n\n  // Process Resource Listing definitions (authorizations)\n  processDocument(rlDocumentMetadata, results);\n\n\n  // Process each API Declaration\n  adResourcePaths = _.reduce(apiDeclarations, function (seenResourcePaths, apiDeclaration, index) {\n    var aResults = results.apiDeclarations[index] = {\n      errors: [],\n      warnings: []\n    };\n    var adDocumentMetadata = getDocumentCache(apiDeclaration);\n\n    // Identify duplicate resource paths defined in the API Declarations\n    validateNoExist(seenResourcePaths, apiDeclaration.resourcePath, 'RESOURCE_PATH', 'Resource path',\n                    ['resourcePath'], aResults.errors);\n\n    if (adResourcePaths.indexOf(apiDeclaration.resourcePath) === -1) {\n      // Identify unused resource paths defined in the API Declarations\n      validateExist(rlResourcePaths, apiDeclaration.resourcePath, 'RESOURCE_PATH', 'Resource path',\n                    ['resourcePath'], aResults.errors);\n\n      seenResourcePaths.push(apiDeclaration.resourcePath);\n    }\n\n    // TODO: Process authorization references\n    // Not possible due to https://github.com/swagger-api/swagger-spec/issues/159\n\n    // Process models\n    processDocument(adDocumentMetadata, aResults);\n\n    // Process the API definitions\n    _.reduce(apiDeclaration.apis, function (seenPaths, api, index) {\n      var aPath = ['apis', index.toString()];\n      var nPath = normalizePath(api.path);\n\n      // Validate duplicate resource path\n      if (seenPaths.indexOf(nPath.path) > -1) {\n        createErrorOrWarning('DUPLICATE_API_PATH', 'API path (or equivalent) already defined: ' + api.path,\n                             aPath.concat('path'), aResults.errors);\n      } else {\n        seenPaths.push(nPath.path);\n      }\n\n      // Process the API operations\n      _.reduce(api.operations, function (seenMethods, operation, index) {\n        var oPath = aPath.concat(['operations', index.toString()]);\n\n        // Validate duplicate operation method\n        validateNoExist(seenMethods, operation.method, 'OPERATION_METHOD', 'Operation method', oPath.concat('method'),\n                        aResults.errors);\n\n        // Keep track of the seen methods\n        seenMethods.push(operation.method);\n\n        // Keep track of operation types\n        if (spec.primitives.indexOf(operation.type) === -1 && spec.version === '1.2') {\n          addReference(adDocumentMetadata, '#/models/' + operation.type, oPath.concat('type'), aResults);\n        }\n\n        // Process authorization references\n        processAuthRefs(rlDocumentMetadata, operation.authorizations, oPath.concat('authorizations'), aResults);\n\n        // Validate validate inline constraints\n        validateSchemaConstraints(adDocumentMetadata, operation, oPath, aResults);\n\n        // Validate parameters\n        validateParameters(spec, adDocumentMetadata, nPath, operation.parameters, oPath, aResults);\n\n        // Validate unique response code\n        _.reduce(operation.responseMessages, function (seenResponseCodes, responseMessage, index) {\n          var rmPath = oPath.concat(['responseMessages', index.toString()]);\n\n          validateNoExist(seenResponseCodes, responseMessage.code, 'RESPONSE_MESSAGE_CODE', 'Response message code',\n                          rmPath.concat(['code']), aResults.errors);\n\n          // Validate missing model\n          if (responseMessage.responseModel) {\n            addReference(adDocumentMetadata, '#/models/' + responseMessage.responseModel,\n                         rmPath.concat('responseModel'), aResults);\n          }\n\n          return seenResponseCodes.concat(responseMessage.code);\n        }, []);\n\n        return seenMethods;\n      }, []);\n\n      return seenPaths;\n    }, []);\n\n    // Validate API Declaration definitions\n    validateDefinitions(adDocumentMetadata, aResults);\n\n    return seenResourcePaths;\n  }, []);\n\n  // Validate API Declaration definitions\n  validateDefinitions(rlDocumentMetadata, results);\n\n  // Identify unused resource paths defined in the Resource Listing\n  _.each(_.difference(rlResourcePaths, adResourcePaths), function (unused) {\n    var index = rlResourcePaths.indexOf(unused);\n\n    createUnusedErrorOrWarning(resourceListing.apis[index].path, 'RESOURCE_PATH', 'Resource path',\n                               ['apis', index.toString(), 'path'], results.errors);\n  });\n\n  callback(undefined, results);\n};\n\nvar validateSwagger2_0 = function (spec, swaggerObject, callback) { // jshint ignore:line\n  var documentMetadata = getDocumentCache(swaggerObject);\n  var results = {\n    errors: [],\n    warnings: []\n  };\n\n  // Process definitions\n  processDocument(documentMetadata, results);\n\n  // Process security references\n  processAuthRefs(documentMetadata, swaggerObject.security, ['security'], results);\n\n  _.reduce(documentMetadata.resolved.paths, function (seenPaths, path, name) {\n    var pPath = ['paths', name];\n    var nPath = normalizePath(name);\n\n    // Validate duplicate resource path\n    if (seenPaths.indexOf(nPath.path) > -1) {\n      createErrorOrWarning('DUPLICATE_API_PATH', 'API path (or equivalent) already defined: ' + name, pPath,\n                           results.errors);\n    }\n\n    // Validate parameters\n    validateParameters(spec, documentMetadata, nPath, path.parameters, pPath, results, true);\n\n    // Validate the Operations\n    _.each(path, function (operation, method) {\n      var cParams = [];\n      var oPath = pPath.concat(method);\n      var seenParams = [];\n\n      if (validOptionNames.indexOf(method) === -1) {\n        return;\n      }\n\n      // Process security references\n      processAuthRefs(documentMetadata, operation.security, oPath.concat('security'), results);\n\n      // Compose parameters from path global parameters and operation parameters\n      _.each(operation.parameters, function (parameter) {\n        // Can happen with invalid references\n        if (_.isUndefined(parameter)) {\n          return;\n        }\n\n        cParams.push(parameter);\n\n        seenParams.push(parameter.name + ':' + parameter.in);\n      });\n\n      _.each(path.parameters, function (parameter) {\n        var cloned = _.cloneDeep(parameter);\n\n        // The only errors that can occur here are schema constraint validation errors which are already reported above\n        // so do not report them again.\n        cloned.skipErrors = true;\n\n        if (seenParams.indexOf(parameter.name + ':' + parameter.in) === -1) {\n          cParams.push(cloned);\n        }\n      });\n\n      // Validate parameters\n      validateParameters(spec, documentMetadata, nPath, cParams, oPath, results);\n\n      // Validate responses\n      _.each(operation.responses, function (response, responseCode) {\n        // Do not process references to missing responses\n        if (!_.isUndefined(response)) {\n          // Validate validate inline constraints\n          validateSchemaConstraints(documentMetadata, response, oPath.concat('responses', responseCode), results);\n        }\n      });\n    });\n\n    return seenPaths.concat(nPath.path);\n  }, []);\n\n  // Validate definitions\n  validateDefinitions(documentMetadata, results);\n\n  callback(undefined, results);\n};\n\nvar validateSemantically = function (spec, rlOrSO, apiDeclarations, callback) {\n  var cbWrapper = function (err, results) {\n    callback(err, helpers.formatResults(results));\n  };\n  if (spec.version === '1.2') {\n    validateSwagger1_2(spec, rlOrSO, apiDeclarations, cbWrapper); // jshint ignore:line\n  } else {\n    validateSwagger2_0(spec, rlOrSO, cbWrapper); // jshint ignore:line\n  }\n};\n\nvar validateStructurally = function (spec, rlOrSO, apiDeclarations, callback) {\n  validateAgainstSchema(spec, spec.version === '1.2' ? 'resourceListing.json' : 'schema.json', rlOrSO,\n                        function (err, results) {\n                          if (err) {\n                            return callback(err);\n                          }\n\n                          // Only validate the API Declarations if the API is 1.2 and the Resource Listing was valid\n                          if (!results && spec.version === '1.2') {\n                            results = {\n                              errors: [],\n                              warnings: [],\n                              apiDeclarations: []\n                            };\n\n                            async.map(apiDeclarations, function (apiDeclaration, callback2) {\n                              validateAgainstSchema(spec, 'apiDeclaration.json', apiDeclaration, callback2);\n                            }, function (err, allResults) {\n                              if (err) {\n                                return callback(err);\n                              }\n\n                              _.each(allResults, function (result, index) {\n                                results.apiDeclarations[index] = result;\n                              });\n\n                              callback(undefined, results);\n                            });\n                          } else {\n                            callback(undefined, results);\n                          }\n                        });\n};\n\n/**\n * Creates a new Swagger specification object.\n *\n * @param {string} version - The Swagger version\n *\n * @constructor\n */\nvar Specification = function (version) {\n  var that = this;\n  var createValidators = function (spec, validatorsMap) {\n    return _.reduce(validatorsMap, function (result, schemas, schemaName) {\n      result[schemaName] = helpers.createJsonValidator(schemas);\n\n      return result;\n    }, {});\n  };\n  var fixSchemaId = function (schemaName) {\n    // Swagger 1.2 schema files use one id but use a different id when referencing schema files.  We also use the schema\n    // file name to reference the schema in ZSchema.  To fix this so that the JSON Schema validator works properly, we\n    // need to set the id to be the name of the schema file.\n    var fixed = _.cloneDeep(that.schemas[schemaName]);\n\n    fixed.id = schemaName;\n\n    return fixed;\n  };\n  var primitives = ['string', 'number', 'boolean', 'integer', 'array'];\n\n  switch (version) {\n  case '1.2':\n    this.docsUrl = 'https://github.com/swagger-api/swagger-spec/blob/master/versions/1.2.md';\n    this.primitives = _.union(primitives, ['void', 'File']);\n    this.schemasUrl = 'https://github.com/swagger-api/swagger-spec/tree/master/schemas/v1.2';\n\n    // Here explicitly to allow browserify to work\n    this.schemas = {\n      'apiDeclaration.json': require('../schemas/1.2/apiDeclaration.json'),\n      'authorizationObject.json': require('../schemas/1.2/authorizationObject.json'),\n      'dataType.json': require('../schemas/1.2/dataType.json'),\n      'dataTypeBase.json': require('../schemas/1.2/dataTypeBase.json'),\n      'infoObject.json': require('../schemas/1.2/infoObject.json'),\n      'modelsObject.json': require('../schemas/1.2/modelsObject.json'),\n      'oauth2GrantType.json': require('../schemas/1.2/oauth2GrantType.json'),\n      'operationObject.json': require('../schemas/1.2/operationObject.json'),\n      'parameterObject.json': require('../schemas/1.2/parameterObject.json'),\n      'resourceListing.json': require('../schemas/1.2/resourceListing.json'),\n      'resourceObject.json': require('../schemas/1.2/resourceObject.json')\n    };\n\n    this.validators = createValidators(this, {\n      'apiDeclaration.json': _.map([\n        'dataTypeBase.json',\n        'modelsObject.json',\n        'oauth2GrantType.json',\n        'authorizationObject.json',\n        'parameterObject.json',\n        'operationObject.json',\n        'apiDeclaration.json'\n      ], fixSchemaId),\n      'resourceListing.json': _.map([\n        'resourceObject.json',\n        'infoObject.json',\n        'oauth2GrantType.json',\n        'authorizationObject.json',\n        'resourceListing.json'\n      ], fixSchemaId)\n    });\n\n    break;\n\n  case '2.0':\n    this.docsUrl = 'https://github.com/swagger-api/swagger-spec/blob/master/versions/2.0.md';\n    this.primitives = _.union(primitives, ['file']);\n    this.schemasUrl = 'https://github.com/swagger-api/swagger-spec/tree/master/schemas/v2.0';\n\n    // Here explicitly to allow browserify to work\n    this.schemas = {\n      'schema.json': require('../schemas/2.0/schema.json')\n    };\n\n    this.validators = createValidators(this, {\n      'schema.json': [fixSchemaId('schema.json')]\n    });\n\n    break;\n\n  default:\n    throw new Error(version + ' is an unsupported Swagger specification version');\n  }\n\n  this.version = version;\n};\n\n/**\n * Returns the result of the validation of the Swagger document(s).\n *\n * @param {object} rlOrSO - The Swagger Resource Listing (1.2) or Swagger Object (2.0)\n * @param {object[]} [apiDeclarations] - The array of Swagger API Declarations (1.2)\n * @param {resultCallback} callback - The result callback\n *\n * @returns undefined if validation passes or an object containing errors and/or warnings\n * @throws Error if the arguments provided are not valid\n */\nSpecification.prototype.validate = function (rlOrSO, apiDeclarations, callback) {\n  // Validate arguments\n  switch (this.version) {\n  case '1.2':\n    // Validate arguments\n    if (_.isUndefined(rlOrSO)) {\n      throw new Error('resourceListing is required');\n    } else if (!_.isPlainObject(rlOrSO)) {\n      throw new TypeError('resourceListing must be an object');\n    }\n\n    if (_.isUndefined(apiDeclarations)) {\n      throw new Error('apiDeclarations is required');\n    } else if (!_.isArray(apiDeclarations)) {\n      throw new TypeError('apiDeclarations must be an array');\n    }\n\n    break;\n\n  case '2.0':\n    // Validate arguments\n    if (_.isUndefined(rlOrSO)) {\n      throw new Error('swaggerObject is required');\n    } else if (!_.isPlainObject(rlOrSO)) {\n      throw new TypeError('swaggerObject must be an object');\n    }\n\n    break;\n  }\n\n  if (this.version === '2.0') {\n    callback = arguments[1];\n  }\n\n  if (_.isUndefined(callback)) {\n    throw new Error('callback is required');\n  } else if (!_.isFunction(callback)) {\n    throw new TypeError('callback must be a function');\n  }\n\n  // For Swagger 2.0, make sure apiDeclarations is an empty array\n  if (this.version === '2.0') {\n    apiDeclarations = [];\n  }\n\n  var that = this;\n\n  // Perform the validation\n  validateStructurally(this, rlOrSO, apiDeclarations, function (err, result) {\n    if (err || helpers.formatResults(result)) {\n      callback(err, result);\n    } else {\n      validateSemantically(that, rlOrSO, apiDeclarations, callback);\n    }\n  });\n};\n\n/**\n * Returns a JSON Schema representation of a composed model based on its id or reference.\n *\n * Note: For Swagger 1.2, we only perform structural validation prior to composing the model.\n *\n * @param {object} apiDOrSO - The Swagger Resource API Declaration (1.2) or the Swagger Object (2.0)\n * @param {string} modelIdOrRef - The model id (1.2) or the reference to the model (1.2 or 2.0)\n * @param {resultCallback} callback - The result callback\n *\n * @returns the object representing a composed object\n *\n * @throws Error if there are validation errors while creating\n */\nSpecification.prototype.composeModel = function (apiDOrSO, modelIdOrRef, callback) {\n  var swaggerVersion = helpers.getSwaggerVersion(apiDOrSO);\n  var doComposition = function (err, results) {\n    var documentMetadata;\n\n    if (err) {\n      return callback(err);\n    } else if (helpers.getErrorCount(results) > 0) {\n      return handleValidationError(results, callback);\n    }\n\n    documentMetadata = getDocumentCache(apiDOrSO);\n    results = {\n      errors: [],\n      warnings: []\n    };\n\n    processDocument(documentMetadata, results);\n\n    if (!documentMetadata.definitions[modelIdOrRef]) {\n      return callback();\n    }\n\n    if (helpers.getErrorCount(results) > 0) {\n      return handleValidationError(results, callback);\n    }\n\n    callback(undefined, getOrComposeSchema(documentMetadata, modelIdOrRef));\n  };\n\n  switch (this.version) {\n  case '1.2':\n    // Validate arguments\n    if (_.isUndefined(apiDOrSO)) {\n      throw new Error('apiDeclaration is required');\n    } else if (!_.isPlainObject(apiDOrSO)) {\n      throw new TypeError('apiDeclaration must be an object');\n    }\n\n    if (_.isUndefined(modelIdOrRef)) {\n      throw new Error('modelId is required');\n    }\n\n    break;\n\n  case '2.0':\n    // Validate arguments\n    if (_.isUndefined(apiDOrSO)) {\n      throw new Error('swaggerObject is required');\n    } else if (!_.isPlainObject(apiDOrSO)) {\n      throw new TypeError('swaggerObject must be an object');\n    }\n\n    if (_.isUndefined(modelIdOrRef)) {\n      throw new Error('modelRef is required');\n    }\n\n    break;\n  }\n\n  if (_.isUndefined(callback)) {\n    throw new Error('callback is required');\n  } else if (!_.isFunction(callback)) {\n    throw new TypeError('callback must be a function');\n  }\n\n  if (modelIdOrRef.charAt(0) !== '#') {\n    if (this.version === '1.2') {\n      modelIdOrRef = '#/models/' + modelIdOrRef;\n    } else {\n      throw new Error('modelRef must be a JSON Pointer');\n    }\n  }\n\n  // Ensure the document is valid first\n  if (swaggerVersion === '1.2') {\n    validateAgainstSchema(this, 'apiDeclaration.json', apiDOrSO, doComposition);\n  } else {\n    this.validate(apiDOrSO, doComposition);\n  }\n};\n\n/**\n * Validates a model based on its id.\n *\n * Note: For Swagger 1.2, we only perform structural validation prior to composing the model.\n *\n * @param {object} apiDOrSO - The Swagger Resource API Declaration (1.2) or the Swagger Object (2.0)\n * @param {string} modelIdOrRef - The model id (1.2) or the reference to the model (1.2 or 2.0)\n * @param {*} data - The model to validate\n * @param {resultCallback} callback - The result callback\n *\n * @returns undefined if validation passes or an object containing errors and/or warnings\n *\n * @throws Error if there are validation errors while creating\n */\nSpecification.prototype.validateModel = function (apiDOrSO, modelIdOrRef, data, callback) {\n  switch (this.version) {\n  case '1.2':\n    // Validate arguments\n    if (_.isUndefined(apiDOrSO)) {\n      throw new Error('apiDeclaration is required');\n    } else if (!_.isPlainObject(apiDOrSO)) {\n      throw new TypeError('apiDeclaration must be an object');\n    }\n\n    if (_.isUndefined(modelIdOrRef)) {\n      throw new Error('modelId is required');\n    }\n\n    break;\n\n  case '2.0':\n    // Validate arguments\n    if (_.isUndefined(apiDOrSO)) {\n      throw new Error('swaggerObject is required');\n    } else if (!_.isPlainObject(apiDOrSO)) {\n      throw new TypeError('swaggerObject must be an object');\n    }\n\n    if (_.isUndefined(modelIdOrRef)) {\n      throw new Error('modelRef is required');\n    }\n\n    break;\n  }\n\n  if (_.isUndefined(data)) {\n    throw new Error('data is required');\n  }\n\n  if (_.isUndefined(callback)) {\n    throw new Error('callback is required');\n  } else if (!_.isFunction(callback)) {\n    throw new TypeError('callback must be a function');\n  }\n\n  var that = this;\n\n  this.composeModel(apiDOrSO, modelIdOrRef, function (err, result) {\n    if (err) {\n      return callback(err);\n    }\n\n    validateAgainstSchema(that, result, data, callback);\n  });\n};\n\n/**\n * Returns a fully resolved document or document fragment.  (Does not perform validation as this is typically called\n * after validation occurs.))\n *\n * @param {object} document - The document to resolve or the document containing the reference to resolve\n * @param {string} [ptr] - The JSON Pointer or undefined to return the whole document\n * @param {resultCallback} callback - The result callback\n *\n * @returns the fully resolved document or fragment\n *\n * @throws Error if there are upstream errors\n */\nSpecification.prototype.resolve = function (document, ptr, callback) {\n  var documentMetadata;\n  var respond = function (document) {\n    if (_.isString(ptr)) {\n      return callback(undefined, traverse(document).get(JsonRefs.pathFromPtr(ptr)));\n    } else {\n      return callback(undefined, document);\n    }\n  };\n\n  // Validate arguments\n  if (_.isUndefined(document)) {\n    throw new Error('document is required');\n  } else if (!_.isPlainObject(document)) {\n    throw new TypeError('document must be an object');\n  }\n\n  if (arguments.length === 2) {\n    callback = arguments[1];\n    ptr = undefined;\n  }\n\n  if (!_.isUndefined(ptr) && !_.isString(ptr)) {\n    throw new TypeError('ptr must be a JSON Pointer string');\n  }\n\n  if (_.isUndefined(callback)) {\n    throw new Error('callback is required');\n  } else if (!_.isFunction(callback)) {\n    throw new TypeError('callback must be a function');\n  }\n\n  documentMetadata = getDocumentCache(document);\n\n  // Swagger 1.2 is not supported due to invalid JSON References being used.  Even if the JSON References were valid,\n  // the JSON Schema for Swagger 1.2 do not allow JavaScript objects in all places where the resoution would occur.\n  if (documentMetadata.swaggerVersion === '1.2') {\n    throw new Error('Swagger 1.2 is not supported');\n  }\n\n  if (!documentMetadata.resolved) {\n    // Ensure the document is valid first\n    this.validate(document, function (err, results) {\n      if (err) {\n        return callback(err);\n      } else if (helpers.getErrorCount(results) > 0) {\n        return handleValidationError(results, callback);\n      }\n\n      return respond(documentMetadata.resolved);\n    });\n  } else {\n    return respond(documentMetadata.resolved);\n  }\n};\n\n/**\n * Converts the Swagger 1.2 documents to a Swagger 2.0 document.\n *\n * @param {object} resourceListing - The Swagger Resource Listing\n * @param {object[]} [apiDeclarations] - The array of Swagger API Declarations\n * @param {boolean=false} [skipValidation] - Whether or not to skip validation\n * @param {resultCallback} callback - The result callback\n *\n * @returns the converted Swagger document\n *\n * @throws Error if the arguments provided are not valid\n */\nSpecification.prototype.convert = function (resourceListing, apiDeclarations, skipValidation, callback) {\n  var doConvert = function (resourceListing, apiDeclarations) {\n    callback(undefined, swaggerConverter(resourceListing, apiDeclarations));\n  };\n\n  if (this.version !== '1.2') {\n    throw new Error('Specification#convert only works for Swagger 1.2');\n  }\n\n  // Validate arguments\n  if (_.isUndefined(resourceListing)) {\n    throw new Error('resourceListing is required');\n  } else if (!_.isPlainObject(resourceListing)) {\n    throw new TypeError('resourceListing must be an object');\n  }\n\n  // API Declarations are optional because swagger-converter was written to support it\n  if (_.isUndefined(apiDeclarations)) {\n    apiDeclarations = [];\n  }\n\n  if (!_.isArray(apiDeclarations)) {\n    throw new TypeError('apiDeclarations must be an array');\n  }\n\n  if (arguments.length < 4) {\n    callback = arguments[arguments.length - 1];\n  }\n\n  if (_.isUndefined(callback)) {\n    throw new Error('callback is required');\n  } else if (!_.isFunction(callback)) {\n    throw new TypeError('callback must be a function');\n  }\n\n  if (skipValidation === true) {\n    doConvert(resourceListing, apiDeclarations);\n  } else {\n    this.validate(resourceListing, apiDeclarations, function (err, results) {\n      if (err) {\n        return callback(err);\n      } else if (helpers.getErrorCount(results) > 0) {\n        return handleValidationError(results, callback);\n      }\n\n      doConvert(resourceListing, apiDeclarations);\n    });\n  }\n};\n\nmodule.exports.v1 = module.exports.v1_2 = new Specification('1.2'); // jshint ignore:line\nmodule.exports.v2 = module.exports.v2_0 = new Specification('2.0'); // jshint ignore:line\n","/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2014 Apigee Corporation\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n'use strict';\n\nvar _ = require('lodash');\nvar helpers = require('./helpers');\n\n// http://tools.ietf.org/html/rfc3339#section-5.6\nvar dateRegExp = /^([0-9]{4})-([0-9]{2})-([0-9]{2})$/;\n// http://tools.ietf.org/html/rfc3339#section-5.6\nvar dateTimeRegExp = /^([0-9]{2}):([0-9]{2}):([0-9]{2})(.[0-9]+)?(z|([+-][0-9]{2}):([0-9]{2}))$/;\nvar isValidDate = module.exports.isValidDate = function (date) {\n  var day;\n  var matches;\n  var month;\n\n  if (_.isDate(date)) {\n    return true;\n  }\n\n  if (!_.isString(date)) {\n    date = date.toString();\n  }\n\n  matches = dateRegExp.exec(date);\n\n  if (matches === null) {\n    return false;\n  }\n\n  day = matches[3];\n  month = matches[2];\n\n  if (month < '01' || month > '12' || day < '01' || day > '31') {\n    return false;\n  }\n\n  return true;\n};\nvar isValidDateTime = module.exports.isValidDateTime = function (dateTime) {\n  var hour;\n  var date;\n  var time;\n  var matches;\n  var minute;\n  var parts;\n  var second;\n  var timezoneHours;\n  var timezoneMinutes;\n\n  if (_.isDate(dateTime)) {\n    return true;\n  }\n\n  if (!_.isString(dateTime)) {\n    dateTime = dateTime.toString();\n  }\n\n  parts = dateTime.toLowerCase().split('t');\n  date = parts[0];\n  time = parts.length > 1 ? parts[1] : undefined;\n\n  if (!isValidDate(date)) {\n    return false;\n  }\n\n  matches = dateTimeRegExp.exec(time);\n\n  if (matches === null) {\n    return false;\n  }\n\n  hour = matches[1];\n  minute = matches[2];\n  second = matches[3];\n  if (matches[5] === 'z') {\n    timezoneHours = 0;\n    timezoneMinutes = 0;\n  } else {\n    timezoneHours = Number(matches[6]);\n    timezoneMinutes = Number(matches[7]);\n  }\n\n  var validTimezoneMinutes = timezoneMinutes === 0 || timezoneMinutes === 15 || timezoneMinutes === 30 || timezoneMinutes === 45;\n\n  if (hour > '23' || minute > '59' || second > '59' || timezoneHours > 14 || timezoneHours < -12 || !validTimezoneMinutes) {\n    return false;\n  }\n\n  return true;\n};\n\nvar throwErrorWithCode = function (code, msg) {\n  var err = new Error(msg);\n\n  err.code = code;\n  err.failedValidation = true;\n\n  throw err;\n};\n\nmodule.exports.validateAgainstSchema = function (schemaOrName, data, validator) {\n  var sanitizeError = function (obj) {\n    // Make anyOf/oneOf errors more human readable (Issue 200)\n    var defType = ['additionalProperties', 'items'].indexOf(obj.path[obj.path.length - 1]) > -1 ?\n          'schema' :\n          obj.path[obj.path.length - 2];\n\n    if (['ANY_OF_MISSING', 'ONE_OF_MISSING'].indexOf(obj.code) > -1) {\n      switch (defType) {\n      case 'parameters':\n        defType = 'parameter';\n        break;\n\n      case 'responses':\n        defType = 'response';\n        break;\n\n      case 'schema':\n        defType += ' ' + obj.path[obj.path.length - 1];\n\n        // no default\n      }\n\n      obj.message = 'Not a valid ' + defType + ' definition';\n    }\n\n    // Remove the params portion of the error\n    delete obj.params;\n    delete obj.schemaId;\n\n    if (obj.inner) {\n      _.each(obj.inner, function (nObj) {\n        sanitizeError(nObj);\n      });\n    }\n  };\n  var schema = _.isPlainObject(schemaOrName) ? _.cloneDeep(schemaOrName) : schemaOrName;\n\n  // We don't check this due to internal usage but if validator is not provided, schemaOrName must be a schema\n  if (_.isUndefined(validator)) {\n    validator = helpers.createJsonValidator([schema]);\n  }\n\n  var valid = validator.validate(data, schema);\n\n  if (!valid) {\n    try {\n      throwErrorWithCode('SCHEMA_VALIDATION_FAILED', 'Failed schema validation');\n    } catch (err) {\n      err.results = {\n        errors: _.map(validator.getLastErrors(), function (err) {\n          sanitizeError(err);\n\n          return err;\n        }),\n        warnings: []\n      };\n\n      throw err;\n    }\n  }\n};\n\n\n/**\n * Validates a schema of type array is properly formed (when necessar).\n *\n * *param {object} schema - The schema object to validate\n *\n * @throws Error if the schema says it's an array but it is not formed properly\n *\n * @see {@link https://github.com/swagger-api/swagger-spec/issues/174}\n */\nvar validateArrayType = module.exports.validateArrayType = function (schema) {\n  // We have to do this manually for now\n  if (schema.type === 'array' && _.isUndefined(schema.items)) {\n    throwErrorWithCode('OBJECT_MISSING_REQUIRED_PROPERTY', 'Missing required property: items');\n  }\n};\n\n/**\n * Validates the request or response content type (when necessary).\n *\n * @param {string[]} gPOrC - The valid consumes at the API scope\n * @param {string[]} oPOrC - The valid consumes at the operation scope\n * @param {object} reqOrRes - The request or response\n *\n * @throws Error if the content type is invalid\n */\nmodule.exports.validateContentType = function (gPOrC, oPOrC, reqOrRes) {\n  // http://www.w3.org/Protocols/rfc2616/rfc2616-sec7.html#sec7.2.1\n  var isResponse = typeof reqOrRes.end === 'function';\n  var contentType = isResponse ? reqOrRes.getHeader('content-type') : reqOrRes.headers['content-type'];\n  var pOrC = _.map(_.union(gPOrC, oPOrC), function (contentType) {\n    return contentType.split(';')[0];\n  });\n\n  if (!contentType) {\n    if (isResponse) {\n      contentType = 'text/plain';\n    } else {\n      contentType = 'application/octet-stream';\n    }\n  }\n\n  contentType = contentType.split(';')[0];\n\n  if (pOrC.length > 0 && (isResponse ?\n                          true :\n                          ['POST', 'PUT'].indexOf(reqOrRes.method) !== -1) && pOrC.indexOf(contentType) === -1) {\n    throw new Error('Invalid content type (' + contentType + ').  These are valid: ' + pOrC.join(', '));\n  }\n};\n\n/**\n * Validates the value against the allowable values (when necessary).\n *\n * @param {*} val - The parameter value\n * @param {string[]} allowed - The allowable values\n *\n * @throws Error if the value is not allowable\n */\nvar validateEnum = module.exports.validateEnum = function (val, allowed) {\n  if (!_.isUndefined(allowed) && !_.isUndefined(val) && allowed.indexOf(val) === -1) {\n    throwErrorWithCode('ENUM_MISMATCH', 'Not an allowable value (' + allowed.join(', ') + '): ' + val);\n  }\n};\n\n/**\n * Validates the value is less than the maximum (when necessary).\n *\n * @param {*} val - The parameter value\n * @param {string} maximum - The maximum value\n * @param {boolean} [exclusive=false] - Whether or not the value includes the maximum in its comparison\n *\n * @throws Error if the value is greater than the maximum\n */\nvar validateMaximum = module.exports.validateMaximum = function (val, maximum, type, exclusive) {\n  var code = exclusive === true ? 'MAXIMUM_EXCLUSIVE' : 'MAXIMUM';\n  var testMax;\n  var testVal;\n\n  if (_.isUndefined(exclusive)) {\n    exclusive = false;\n  }\n\n  if (type === 'integer') {\n    testVal = parseInt(val, 10);\n  } else if (type === 'number') {\n    testVal = parseFloat(val);\n  }\n\n  if (!_.isUndefined(maximum)) {\n    testMax = parseFloat(maximum);\n\n    if (exclusive && testVal >= testMax) {\n      throwErrorWithCode(code, 'Greater than or equal to the configured maximum (' + maximum + '): ' + val);\n    } else if (testVal > testMax) {\n      throwErrorWithCode(code, 'Greater than the configured maximum (' + maximum + '): ' + val);\n    }\n  }\n};\n\n/**\n * Validates the array count is less than the maximum (when necessary).\n *\n * @param {*[]} val - The parameter value\n * @param {number} maxItems - The maximum number of items\n *\n * @throws Error if the value contains more items than allowable\n */\nvar validateMaxItems = module.exports.validateMaxItems = function (val, maxItems) {\n  if (!_.isUndefined(maxItems) && val.length > maxItems) {\n    throwErrorWithCode('ARRAY_LENGTH_LONG', 'Array is too long (' + val.length + '), maximum ' + maxItems);\n  }\n};\n\n/**\n * Validates the value length is less than the maximum (when necessary).\n *\n * @param {*[]} val - The parameter value\n * @param {number} maxLength - The maximum length\n *\n * @throws Error if the value's length is greater than the maximum\n */\nvar validateMaxLength = module.exports.validateMaxLength = function (val, maxLength) {\n  if (!_.isUndefined(maxLength) && val.length > maxLength) {\n    throwErrorWithCode('MAX_LENGTH', 'String is too long (' + val.length + ' chars), maximum ' + maxLength);\n  }\n};\n\n/**\n * Validates the value's property count is greater than the maximum (when necessary).\n *\n * @param {*[]} val - The parameter value\n * @param {number} minProperties - The maximum number of properties\n *\n * @throws Error if the value's property count is less than the maximum\n */\nvar validateMaxProperties = module.exports.validateMaxProperties = function (val, maxProperties) {\n  var propCount = _.isPlainObject(val) ? Object.keys(val).length : 0;\n\n  if (!_.isUndefined(maxProperties) && propCount > maxProperties) {\n    throwErrorWithCode('MAX_PROPERTIES',\n                       'Number of properties is too many (' + propCount + ' properties), maximum ' + maxProperties);\n  }\n};\n\n/**\n * Validates the value array count is greater than the minimum (when necessary).\n *\n * @param {*} val - The parameter value\n * @param {string} minimum - The minimum value\n * @param {boolean} [exclusive=false] - Whether or not the value includes the minimum in its comparison\n *\n * @throws Error if the value is less than the minimum\n */\nvar validateMinimum = module.exports.validateMinimum = function (val, minimum, type, exclusive) {\n  var code = exclusive === true ? 'MINIMUM_EXCLUSIVE' : 'MINIMUM';\n  var testMin;\n  var testVal;\n\n  if (_.isUndefined(exclusive)) {\n    exclusive = false;\n  }\n\n  if (type === 'integer') {\n    testVal = parseInt(val, 10);\n  } else if (type === 'number') {\n    testVal = parseFloat(val);\n  }\n\n  if (!_.isUndefined(minimum)) {\n    testMin = parseFloat(minimum);\n\n    if (exclusive && testVal <= testMin) {\n      throwErrorWithCode(code, 'Less than or equal to the configured minimum (' + minimum + '): ' + val);\n    } else if (testVal < testMin) {\n      throwErrorWithCode(code, 'Less than the configured minimum (' + minimum + '): ' + val);\n    }\n  }\n};\n\n/**\n * Validates the value value contains fewer items than allowed (when necessary).\n *\n * @param {*[]} val - The parameter value\n * @param {number} minItems - The minimum number of items\n *\n * @throws Error if the value contains fewer items than allowable\n */\nvar validateMinItems = module.exports.validateMinItems = function (val, minItems) {\n  if (!_.isUndefined(minItems) && val.length < minItems) {\n    throwErrorWithCode('ARRAY_LENGTH_SHORT', 'Array is too short (' + val.length + '), minimum ' + minItems);\n  }\n};\n\n/**\n * Validates the value length is less than the minimum (when necessary).\n *\n * @param {*[]} val - The parameter value\n * @param {number} minLength - The minimum length\n *\n * @throws Error if the value's length is less than the minimum\n */\nvar validateMinLength = module.exports.validateMinLength = function (val, minLength) {\n  if (!_.isUndefined(minLength) && val.length < minLength) {\n    throwErrorWithCode('MIN_LENGTH', 'String is too short (' + val.length + ' chars), minimum ' + minLength);\n  }\n};\n\n/**\n * Validates the value's property count is less than or equal to the minimum (when necessary).\n *\n * @param {*[]} val - The parameter value\n * @param {number} minProperties - The minimum number of properties\n *\n * @throws Error if the value's property count is less than the minimum\n */\nvar validateMinProperties = module.exports.validateMinProperties = function (val, minProperties) {\n  var propCount = _.isPlainObject(val) ? Object.keys(val).length : 0;\n\n  if (!_.isUndefined(minProperties) && propCount < minProperties) {\n    throwErrorWithCode('MIN_PROPERTIES',\n                       'Number of properties is too few (' + propCount + ' properties), minimum ' + minProperties);\n  }\n};\n\n/**\n * Validates the value is a multiple of the provided number (when necessary).\n *\n * @param {*[]} val - The parameter value\n * @param {number} multipleOf - The number that should divide evenly into the value\n *\n * @throws Error if the value contains fewer items than allowable\n */\nvar validateMultipleOf = module.exports.validateMultipleOf = function (val, multipleOf) {\n  if (!_.isUndefined(multipleOf) && val % multipleOf !== 0) {\n    throwErrorWithCode('MULTIPLE_OF', 'Not a multiple of ' + multipleOf);\n  }\n};\n\n/**\n * Validates the value matches a pattern (when necessary).\n *\n * @param {string} name - The parameter name\n * @param {*} val - The parameter value\n * @param {string} pattern - The pattern\n *\n * @throws Error if the value does not match the pattern\n */\nvar validatePattern = module.exports.validatePattern = function (val, pattern) {\n  if (!_.isUndefined(pattern) && _.isNull(val.match(new RegExp(pattern)))) {\n    throwErrorWithCode('PATTERN', 'Does not match required pattern: ' + pattern);\n  }\n};\n\n/**\n * Validates the value requiredness (when necessary).\n *\n * @param {*} val - The parameter value\n * @param {boolean} required - Whether or not the parameter is required\n *\n * @throws Error if the value is required but is not present\n */\nmodule.exports.validateRequiredness = function (val, required) {\n  if (!_.isUndefined(required) && required === true && _.isUndefined(val)) {\n    throwErrorWithCode('REQUIRED', 'Is required');\n  }\n};\n\n/**\n * Validates the value type and format (when necessary).\n *\n * @param {string} version - The Swagger version\n * @param {*} val - The parameter value\n * @param {string} type - The parameter type\n * @param {string} format - The parameter format\n * @param {boolean} [skipError=false] - Whether or not to skip throwing an error (Useful for validating arrays)\n *\n * @throws Error if the value is not the proper type or format\n */\nvar validateTypeAndFormat = module.exports.validateTypeAndFormat =\n  function validateTypeAndFormat (version, val, type, format, allowEmptyValue, skipError) {\n    var result = true;\n    var oVal = val;\n\n    // If there is an empty value and we allow empty values, the value is always valid\n    if (allowEmptyValue === true && val === '') {\n      return;\n    }\n\n    if (_.isArray(val)) {\n      _.each(val, function (aVal, index) {\n        if (!validateTypeAndFormat(version, aVal, type, format, allowEmptyValue, true)) {\n          throwErrorWithCode('INVALID_TYPE', 'Value at index ' + index + ' is not a valid ' + type + ': ' + aVal);\n        }\n      });\n    } else {\n      switch (type) {\n      case 'boolean':\n        // Coerce the value only for Swagger 1.2\n        if (version === '1.2' && _.isString(val)) {\n          if (val === 'false') {\n            val = false;\n          } else if (val === 'true') {\n            val = true;\n          }\n        }\n\n        result = _.isBoolean(val);\n        break;\n      case 'integer':\n        // Coerce the value only for Swagger 1.2\n        if (version === '1.2' && _.isString(val)) {\n          val = Number(val);\n        }\n\n        result = _.isFinite(val) && (Math.round(val) === val);\n        break;\n      case 'number':\n        // Coerce the value only for Swagger 1.2\n        if (version === '1.2' && _.isString(val)) {\n          val = Number(val);\n        }\n\n        result = _.isFinite(val);\n        break;\n      case 'string':\n        if (!_.isUndefined(format)) {\n          switch (format) {\n          case 'date':\n            result = isValidDate(val);\n            break;\n          case 'date-time':\n            result = isValidDateTime(val);\n            break;\n          }\n        }\n        break;\n      case 'void':\n        result = _.isUndefined(val);\n        break;\n      }\n    }\n\n    if (skipError) {\n      return result;\n    } else if (!result) {\n      throwErrorWithCode('INVALID_TYPE',\n                         type !== 'void' ?\n                           'Not a valid ' + (_.isUndefined(format) ? '' : format + ' ') + type + ': ' + oVal :\n                           'Void does not allow a value');\n    }\n  };\n\n/**\n * Validates the value values are unique (when necessary).\n *\n * @param {string[]} val - The parameter value\n * @param {boolean} isUnique - Whether or not the parameter values are unique\n *\n * @throws Error if the value has duplicates\n */\nvar validateUniqueItems = module.exports.validateUniqueItems = function (val, isUnique) {\n  if (!_.isUndefined(isUnique) && _.uniq(val).length !== val.length) {\n    throwErrorWithCode('ARRAY_UNIQUE', 'Does not allow duplicate values: ' + val.join(', '));\n  }\n};\n\n/**\n * Validates the value against the schema.\n *\n * @param {string} version - The Swagger version\n * @param {object} schema - The schema to use to validate things\n * @param {string[]} path - The path to the schema\n * @param {*} [val] - The value to validate or undefined to use the default value provided by the schema\n *\n * @throws Error if any validation failes\n */\nvar validateSchemaConstraints = module.exports.validateSchemaConstraints = function (version, schema, path, val) {\n  var resolveSchema = function (schema) {\n    var resolved = schema;\n\n    if (resolved.schema) {\n      path = path.concat(['schema']);\n\n      resolved = resolveSchema(resolved.schema);\n    }\n\n    return resolved;\n  };\n\n  var type = schema.type;\n  var allowEmptyValue;\n\n  if (!type) {\n    if (!schema.schema) {\n      if (path[path.length - 2] === 'responses') {\n        type = 'void';\n      } else {\n        type = 'object';\n      }\n    } else {\n      schema = resolveSchema(schema);\n      type = schema.type || 'object';\n    }\n  }\n\n  allowEmptyValue = schema ? schema.allowEmptyValue === true : false;\n\n  try {\n    // Always perform this check even if there is no value\n    if (type === 'array') {\n      validateArrayType(schema);\n    }\n\n    // Default to default value if necessary\n    if (_.isUndefined(val)) {\n      val = version === '1.2' ? schema.defaultValue : schema.default;\n\n      path = path.concat([version === '1.2' ? 'defaultValue' : 'default']);\n    }\n\n    // If there is no explicit default value, return as all validations will fail\n    if (_.isUndefined(val)) {\n      return;\n    }\n\n    if (type === 'array') {\n      _.each(val, function (val, index) {\n        try {\n          validateSchemaConstraints(version, schema.items || {}, path.concat(index.toString()), val);\n        } catch (err) {\n          err.message = 'Value at index ' + index + ' ' + (err.code === 'INVALID_TYPE' ? 'is ' : '') +\n            err.message.charAt(0).toLowerCase() + err.message.substring(1);\n\n          throw err;\n        }\n      });\n    } else {\n      validateTypeAndFormat(version, val, type, schema.format, allowEmptyValue);\n    }\n\n    // Validate enum\n    validateEnum(val, schema.enum);\n\n    // Validate maximum\n    validateMaximum(val, schema.maximum, type, schema.exclusiveMaximum);\n\n\n    // Validate maxItems (Swagger 2.0+)\n    validateMaxItems(val, schema.maxItems);\n\n    // Validate maxLength (Swagger 2.0+)\n    validateMaxLength(val, schema.maxLength);\n\n    // Validate maxProperties (Swagger 2.0+)\n    validateMaxProperties(val, schema.maxProperties);\n\n    // Validate minimum\n    validateMinimum(val, schema.minimum, type, schema.exclusiveMinimum);\n\n    // Validate minItems\n    validateMinItems(val, schema.minItems);\n\n    // Validate minLength (Swagger 2.0+)\n    validateMinLength(val, schema.minLength);\n\n    // Validate minProperties (Swagger 2.0+)\n    validateMinProperties(val, schema.minProperties);\n\n    // Validate multipleOf (Swagger 2.0+)\n    validateMultipleOf(val, schema.multipleOf);\n\n    // Validate pattern (Swagger 2.0+)\n    validatePattern(val, schema.pattern);\n\n    // Validate uniqueItems\n    validateUniqueItems(val, schema.uniqueItems);\n  } catch (err) {\n    err.path = path;\n\n    throw err;\n  }\n};\n","(function (global, factory) {\n  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n  typeof define === 'function' && define.amd ? define(['exports'], factory) :\n  (factory((global.async = global.async || {})));\n}(this, (function (exports) { 'use strict';\n\nfunction slice(arrayLike, start) {\n    start = start|0;\n    var newLen = Math.max(arrayLike.length - start, 0);\n    var newArr = Array(newLen);\n    for(var idx = 0; idx < newLen; idx++)  {\n        newArr[idx] = arrayLike[start + idx];\n    }\n    return newArr;\n}\n\n/**\n * Creates a continuation function with some arguments already applied.\n *\n * Useful as a shorthand when combined with other control flow functions. Any\n * arguments passed to the returned function are added to the arguments\n * originally passed to apply.\n *\n * @name apply\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {Function} fn - The function you want to eventually apply all\n * arguments to. Invokes with (arguments...).\n * @param {...*} arguments... - Any number of arguments to automatically apply\n * when the continuation is called.\n * @returns {Function} the partially-applied function\n * @example\n *\n * // using apply\n * async.parallel([\n *     async.apply(fs.writeFile, 'testfile1', 'test1'),\n *     async.apply(fs.writeFile, 'testfile2', 'test2')\n * ]);\n *\n *\n * // the same process without using apply\n * async.parallel([\n *     function(callback) {\n *         fs.writeFile('testfile1', 'test1', callback);\n *     },\n *     function(callback) {\n *         fs.writeFile('testfile2', 'test2', callback);\n *     }\n * ]);\n *\n * // It's possible to pass any number of additional arguments when calling the\n * // continuation:\n *\n * node> var fn = async.apply(sys.puts, 'one');\n * node> fn('two', 'three');\n * one\n * two\n * three\n */\nvar apply = function(fn/*, ...args*/) {\n    var args = slice(arguments, 1);\n    return function(/*callArgs*/) {\n        var callArgs = slice(arguments);\n        return fn.apply(null, args.concat(callArgs));\n    };\n};\n\nvar initialParams = function (fn) {\n    return function (/*...args, callback*/) {\n        var args = slice(arguments);\n        var callback = args.pop();\n        fn.call(this, args, callback);\n    };\n};\n\n/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n  var type = typeof value;\n  return value != null && (type == 'object' || type == 'function');\n}\n\nvar hasSetImmediate = typeof setImmediate === 'function' && setImmediate;\nvar hasNextTick = typeof process === 'object' && typeof process.nextTick === 'function';\n\nfunction fallback(fn) {\n    setTimeout(fn, 0);\n}\n\nfunction wrap(defer) {\n    return function (fn/*, ...args*/) {\n        var args = slice(arguments, 1);\n        defer(function () {\n            fn.apply(null, args);\n        });\n    };\n}\n\nvar _defer;\n\nif (hasSetImmediate) {\n    _defer = setImmediate;\n} else if (hasNextTick) {\n    _defer = process.nextTick;\n} else {\n    _defer = fallback;\n}\n\nvar setImmediate$1 = wrap(_defer);\n\n/**\n * Take a sync function and make it async, passing its return value to a\n * callback. This is useful for plugging sync functions into a waterfall,\n * series, or other async functions. Any arguments passed to the generated\n * function will be passed to the wrapped function (except for the final\n * callback argument). Errors thrown will be passed to the callback.\n *\n * If the function passed to `asyncify` returns a Promise, that promises's\n * resolved/rejected state will be used to call the callback, rather than simply\n * the synchronous return value.\n *\n * This also means you can asyncify ES2017 `async` functions.\n *\n * @name asyncify\n * @static\n * @memberOf module:Utils\n * @method\n * @alias wrapSync\n * @category Util\n * @param {Function} func - The synchronous function, or Promise-returning\n * function to convert to an {@link AsyncFunction}.\n * @returns {AsyncFunction} An asynchronous wrapper of the `func`. To be\n * invoked with `(args..., callback)`.\n * @example\n *\n * // passing a regular synchronous function\n * async.waterfall([\n *     async.apply(fs.readFile, filename, \"utf8\"),\n *     async.asyncify(JSON.parse),\n *     function (data, next) {\n *         // data is the result of parsing the text.\n *         // If there was a parsing error, it would have been caught.\n *     }\n * ], callback);\n *\n * // passing a function returning a promise\n * async.waterfall([\n *     async.apply(fs.readFile, filename, \"utf8\"),\n *     async.asyncify(function (contents) {\n *         return db.model.create(contents);\n *     }),\n *     function (model, next) {\n *         // `model` is the instantiated model object.\n *         // If there was an error, this function would be skipped.\n *     }\n * ], callback);\n *\n * // es2017 example, though `asyncify` is not needed if your JS environment\n * // supports async functions out of the box\n * var q = async.queue(async.asyncify(async function(file) {\n *     var intermediateStep = await processFile(file);\n *     return await somePromise(intermediateStep)\n * }));\n *\n * q.push(files);\n */\nfunction asyncify(func) {\n    return initialParams(function (args, callback) {\n        var result;\n        try {\n            result = func.apply(this, args);\n        } catch (e) {\n            return callback(e);\n        }\n        // if result is Promise object\n        if (isObject(result) && typeof result.then === 'function') {\n            result.then(function(value) {\n                invokeCallback(callback, null, value);\n            }, function(err) {\n                invokeCallback(callback, err.message ? err : new Error(err));\n            });\n        } else {\n            callback(null, result);\n        }\n    });\n}\n\nfunction invokeCallback(callback, error, value) {\n    try {\n        callback(error, value);\n    } catch (e) {\n        setImmediate$1(rethrow, e);\n    }\n}\n\nfunction rethrow(error) {\n    throw error;\n}\n\nvar supportsSymbol = typeof Symbol === 'function';\n\nfunction isAsync(fn) {\n    return supportsSymbol && fn[Symbol.toStringTag] === 'AsyncFunction';\n}\n\nfunction wrapAsync(asyncFn) {\n    return isAsync(asyncFn) ? asyncify(asyncFn) : asyncFn;\n}\n\nfunction applyEach$1(eachfn) {\n    return function(fns/*, ...args*/) {\n        var args = slice(arguments, 1);\n        var go = initialParams(function(args, callback) {\n            var that = this;\n            return eachfn(fns, function (fn, cb) {\n                wrapAsync(fn).apply(that, args.concat(cb));\n            }, callback);\n        });\n        if (args.length) {\n            return go.apply(this, args);\n        }\n        else {\n            return go;\n        }\n    };\n}\n\n/** Detect free variable `global` from Node.js. */\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\n/** Built-in value references. */\nvar Symbol$1 = root.Symbol;\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/** Built-in value references. */\nvar symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;\n\n/**\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the raw `toStringTag`.\n */\nfunction getRawTag(value) {\n  var isOwn = hasOwnProperty.call(value, symToStringTag$1),\n      tag = value[symToStringTag$1];\n\n  try {\n    value[symToStringTag$1] = undefined;\n    var unmasked = true;\n  } catch (e) {}\n\n  var result = nativeObjectToString.call(value);\n  if (unmasked) {\n    if (isOwn) {\n      value[symToStringTag$1] = tag;\n    } else {\n      delete value[symToStringTag$1];\n    }\n  }\n  return result;\n}\n\n/** Used for built-in method references. */\nvar objectProto$1 = Object.prototype;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString$1 = objectProto$1.toString;\n\n/**\n * Converts `value` to a string using `Object.prototype.toString`.\n *\n * @private\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n */\nfunction objectToString(value) {\n  return nativeObjectToString$1.call(value);\n}\n\n/** `Object#toString` result references. */\nvar nullTag = '[object Null]';\nvar undefinedTag = '[object Undefined]';\n\n/** Built-in value references. */\nvar symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;\n\n/**\n * The base implementation of `getTag` without fallbacks for buggy environments.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nfunction baseGetTag(value) {\n  if (value == null) {\n    return value === undefined ? undefinedTag : nullTag;\n  }\n  return (symToStringTag && symToStringTag in Object(value))\n    ? getRawTag(value)\n    : objectToString(value);\n}\n\n/** `Object#toString` result references. */\nvar asyncTag = '[object AsyncFunction]';\nvar funcTag = '[object Function]';\nvar genTag = '[object GeneratorFunction]';\nvar proxyTag = '[object Proxy]';\n\n/**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\nfunction isFunction(value) {\n  if (!isObject(value)) {\n    return false;\n  }\n  // The use of `Object#toString` avoids issues with the `typeof` operator\n  // in Safari 9 which returns 'object' for typed arrays and other constructors.\n  var tag = baseGetTag(value);\n  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n}\n\n/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/**\n * Checks if `value` is a valid array-like length.\n *\n * **Note:** This method is loosely based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n * @example\n *\n * _.isLength(3);\n * // => true\n *\n * _.isLength(Number.MIN_VALUE);\n * // => false\n *\n * _.isLength(Infinity);\n * // => false\n *\n * _.isLength('3');\n * // => false\n */\nfunction isLength(value) {\n  return typeof value == 'number' &&\n    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n}\n\n/**\n * Checks if `value` is array-like. A value is considered array-like if it's\n * not a function and has a `value.length` that's an integer greater than or\n * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n * @example\n *\n * _.isArrayLike([1, 2, 3]);\n * // => true\n *\n * _.isArrayLike(document.body.children);\n * // => true\n *\n * _.isArrayLike('abc');\n * // => true\n *\n * _.isArrayLike(_.noop);\n * // => false\n */\nfunction isArrayLike(value) {\n  return value != null && isLength(value.length) && !isFunction(value);\n}\n\n// A temporary value used to identify if the loop should be broken.\n// See #1064, #1293\nvar breakLoop = {};\n\n/**\n * This method returns `undefined`.\n *\n * @static\n * @memberOf _\n * @since 2.3.0\n * @category Util\n * @example\n *\n * _.times(2, _.noop);\n * // => [undefined, undefined]\n */\nfunction noop() {\n  // No operation performed.\n}\n\nfunction once(fn) {\n    return function () {\n        if (fn === null) return;\n        var callFn = fn;\n        fn = null;\n        callFn.apply(this, arguments);\n    };\n}\n\nvar iteratorSymbol = typeof Symbol === 'function' && Symbol.iterator;\n\nvar getIterator = function (coll) {\n    return iteratorSymbol && coll[iteratorSymbol] && coll[iteratorSymbol]();\n};\n\n/**\n * The base implementation of `_.times` without support for iteratee shorthands\n * or max array length checks.\n *\n * @private\n * @param {number} n The number of times to invoke `iteratee`.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the array of results.\n */\nfunction baseTimes(n, iteratee) {\n  var index = -1,\n      result = Array(n);\n\n  while (++index < n) {\n    result[index] = iteratee(index);\n  }\n  return result;\n}\n\n/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n  return value != null && typeof value == 'object';\n}\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]';\n\n/**\n * The base implementation of `_.isArguments`.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n */\nfunction baseIsArguments(value) {\n  return isObjectLike(value) && baseGetTag(value) == argsTag;\n}\n\n/** Used for built-in method references. */\nvar objectProto$3 = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty$2 = objectProto$3.hasOwnProperty;\n\n/** Built-in value references. */\nvar propertyIsEnumerable = objectProto$3.propertyIsEnumerable;\n\n/**\n * Checks if `value` is likely an `arguments` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n *  else `false`.\n * @example\n *\n * _.isArguments(function() { return arguments; }());\n * // => true\n *\n * _.isArguments([1, 2, 3]);\n * // => false\n */\nvar isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n  return isObjectLike(value) && hasOwnProperty$2.call(value, 'callee') &&\n    !propertyIsEnumerable.call(value, 'callee');\n};\n\n/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\n/**\n * This method returns `false`.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {boolean} Returns `false`.\n * @example\n *\n * _.times(2, _.stubFalse);\n * // => [false, false]\n */\nfunction stubFalse() {\n  return false;\n}\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Built-in value references. */\nvar Buffer = moduleExports ? root.Buffer : undefined;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;\n\n/**\n * Checks if `value` is a buffer.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n * @example\n *\n * _.isBuffer(new Buffer(2));\n * // => true\n *\n * _.isBuffer(new Uint8Array(2));\n * // => false\n */\nvar isBuffer = nativeIsBuffer || stubFalse;\n\n/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER$1 = 9007199254740991;\n\n/** Used to detect unsigned integer values. */\nvar reIsUint = /^(?:0|[1-9]\\d*)$/;\n\n/**\n * Checks if `value` is a valid array-like index.\n *\n * @private\n * @param {*} value The value to check.\n * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.\n * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.\n */\nfunction isIndex(value, length) {\n  length = length == null ? MAX_SAFE_INTEGER$1 : length;\n  return !!length &&\n    (typeof value == 'number' || reIsUint.test(value)) &&\n    (value > -1 && value % 1 == 0 && value < length);\n}\n\n/** `Object#toString` result references. */\nvar argsTag$1 = '[object Arguments]';\nvar arrayTag = '[object Array]';\nvar boolTag = '[object Boolean]';\nvar dateTag = '[object Date]';\nvar errorTag = '[object Error]';\nvar funcTag$1 = '[object Function]';\nvar mapTag = '[object Map]';\nvar numberTag = '[object Number]';\nvar objectTag = '[object Object]';\nvar regexpTag = '[object RegExp]';\nvar setTag = '[object Set]';\nvar stringTag = '[object String]';\nvar weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]';\nvar dataViewTag = '[object DataView]';\nvar float32Tag = '[object Float32Array]';\nvar float64Tag = '[object Float64Array]';\nvar int8Tag = '[object Int8Array]';\nvar int16Tag = '[object Int16Array]';\nvar int32Tag = '[object Int32Array]';\nvar uint8Tag = '[object Uint8Array]';\nvar uint8ClampedTag = '[object Uint8ClampedArray]';\nvar uint16Tag = '[object Uint16Array]';\nvar uint32Tag = '[object Uint32Array]';\n\n/** Used to identify `toStringTag` values of typed arrays. */\nvar typedArrayTags = {};\ntypedArrayTags[float32Tag] = typedArrayTags[float64Tag] =\ntypedArrayTags[int8Tag] = typedArrayTags[int16Tag] =\ntypedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =\ntypedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =\ntypedArrayTags[uint32Tag] = true;\ntypedArrayTags[argsTag$1] = typedArrayTags[arrayTag] =\ntypedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =\ntypedArrayTags[dataViewTag] = typedArrayTags[dateTag] =\ntypedArrayTags[errorTag] = typedArrayTags[funcTag$1] =\ntypedArrayTags[mapTag] = typedArrayTags[numberTag] =\ntypedArrayTags[objectTag] = typedArrayTags[regexpTag] =\ntypedArrayTags[setTag] = typedArrayTags[stringTag] =\ntypedArrayTags[weakMapTag] = false;\n\n/**\n * The base implementation of `_.isTypedArray` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n */\nfunction baseIsTypedArray(value) {\n  return isObjectLike(value) &&\n    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];\n}\n\n/**\n * The base implementation of `_.unary` without support for storing metadata.\n *\n * @private\n * @param {Function} func The function to cap arguments for.\n * @returns {Function} Returns the new capped function.\n */\nfunction baseUnary(func) {\n  return function(value) {\n    return func(value);\n  };\n}\n\n/** Detect free variable `exports`. */\nvar freeExports$1 = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule$1 = freeExports$1 && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports$1 = freeModule$1 && freeModule$1.exports === freeExports$1;\n\n/** Detect free variable `process` from Node.js. */\nvar freeProcess = moduleExports$1 && freeGlobal.process;\n\n/** Used to access faster Node.js helpers. */\nvar nodeUtil = (function() {\n  try {\n    return freeProcess && freeProcess.binding && freeProcess.binding('util');\n  } catch (e) {}\n}());\n\n/* Node.js helper references. */\nvar nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;\n\n/**\n * Checks if `value` is classified as a typed array.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n * @example\n *\n * _.isTypedArray(new Uint8Array);\n * // => true\n *\n * _.isTypedArray([]);\n * // => false\n */\nvar isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\n/** Used for built-in method references. */\nvar objectProto$2 = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty$1 = objectProto$2.hasOwnProperty;\n\n/**\n * Creates an array of the enumerable property names of the array-like `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @param {boolean} inherited Specify returning inherited property names.\n * @returns {Array} Returns the array of property names.\n */\nfunction arrayLikeKeys(value, inherited) {\n  var isArr = isArray(value),\n      isArg = !isArr && isArguments(value),\n      isBuff = !isArr && !isArg && isBuffer(value),\n      isType = !isArr && !isArg && !isBuff && isTypedArray(value),\n      skipIndexes = isArr || isArg || isBuff || isType,\n      result = skipIndexes ? baseTimes(value.length, String) : [],\n      length = result.length;\n\n  for (var key in value) {\n    if ((inherited || hasOwnProperty$1.call(value, key)) &&\n        !(skipIndexes && (\n           // Safari 9 has enumerable `arguments.length` in strict mode.\n           key == 'length' ||\n           // Node.js 0.10 has enumerable non-index properties on buffers.\n           (isBuff && (key == 'offset' || key == 'parent')) ||\n           // PhantomJS 2 has enumerable non-index properties on typed arrays.\n           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||\n           // Skip index properties.\n           isIndex(key, length)\n        ))) {\n      result.push(key);\n    }\n  }\n  return result;\n}\n\n/** Used for built-in method references. */\nvar objectProto$5 = Object.prototype;\n\n/**\n * Checks if `value` is likely a prototype object.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.\n */\nfunction isPrototype(value) {\n  var Ctor = value && value.constructor,\n      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$5;\n\n  return value === proto;\n}\n\n/**\n * Creates a unary function that invokes `func` with its argument transformed.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {Function} transform The argument transform.\n * @returns {Function} Returns the new function.\n */\nfunction overArg(func, transform) {\n  return function(arg) {\n    return func(transform(arg));\n  };\n}\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeKeys = overArg(Object.keys, Object);\n\n/** Used for built-in method references. */\nvar objectProto$4 = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty$3 = objectProto$4.hasOwnProperty;\n\n/**\n * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeys(object) {\n  if (!isPrototype(object)) {\n    return nativeKeys(object);\n  }\n  var result = [];\n  for (var key in Object(object)) {\n    if (hasOwnProperty$3.call(object, key) && key != 'constructor') {\n      result.push(key);\n    }\n  }\n  return result;\n}\n\n/**\n * Creates an array of the own enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects. See the\n * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * for more details.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n *   this.a = 1;\n *   this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keys(new Foo);\n * // => ['a', 'b'] (iteration order is not guaranteed)\n *\n * _.keys('hi');\n * // => ['0', '1']\n */\nfunction keys(object) {\n  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n}\n\nfunction createArrayIterator(coll) {\n    var i = -1;\n    var len = coll.length;\n    return function next() {\n        return ++i < len ? {value: coll[i], key: i} : null;\n    }\n}\n\nfunction createES2015Iterator(iterator) {\n    var i = -1;\n    return function next() {\n        var item = iterator.next();\n        if (item.done)\n            return null;\n        i++;\n        return {value: item.value, key: i};\n    }\n}\n\nfunction createObjectIterator(obj) {\n    var okeys = keys(obj);\n    var i = -1;\n    var len = okeys.length;\n    return function next() {\n        var key = okeys[++i];\n        return i < len ? {value: obj[key], key: key} : null;\n    };\n}\n\nfunction iterator(coll) {\n    if (isArrayLike(coll)) {\n        return createArrayIterator(coll);\n    }\n\n    var iterator = getIterator(coll);\n    return iterator ? createES2015Iterator(iterator) : createObjectIterator(coll);\n}\n\nfunction onlyOnce(fn) {\n    return function() {\n        if (fn === null) throw new Error(\"Callback was already called.\");\n        var callFn = fn;\n        fn = null;\n        callFn.apply(this, arguments);\n    };\n}\n\nfunction _eachOfLimit(limit) {\n    return function (obj, iteratee, callback) {\n        callback = once(callback || noop);\n        if (limit <= 0 || !obj) {\n            return callback(null);\n        }\n        var nextElem = iterator(obj);\n        var done = false;\n        var running = 0;\n\n        function iterateeCallback(err, value) {\n            running -= 1;\n            if (err) {\n                done = true;\n                callback(err);\n            }\n            else if (value === breakLoop || (done && running <= 0)) {\n                done = true;\n                return callback(null);\n            }\n            else {\n                replenish();\n            }\n        }\n\n        function replenish () {\n            while (running < limit && !done) {\n                var elem = nextElem();\n                if (elem === null) {\n                    done = true;\n                    if (running <= 0) {\n                        callback(null);\n                    }\n                    return;\n                }\n                running += 1;\n                iteratee(elem.value, elem.key, onlyOnce(iterateeCallback));\n            }\n        }\n\n        replenish();\n    };\n}\n\n/**\n * The same as [`eachOf`]{@link module:Collections.eachOf} but runs a maximum of `limit` async operations at a\n * time.\n *\n * @name eachOfLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.eachOf]{@link module:Collections.eachOf}\n * @alias forEachOfLimit\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - An async function to apply to each\n * item in `coll`. The `key` is the item's key, or index in the case of an\n * array.\n * Invoked with (item, key, callback).\n * @param {Function} [callback] - A callback which is called when all\n * `iteratee` functions have finished, or an error occurs. Invoked with (err).\n */\nfunction eachOfLimit(coll, limit, iteratee, callback) {\n    _eachOfLimit(limit)(coll, wrapAsync(iteratee), callback);\n}\n\nfunction doLimit(fn, limit) {\n    return function (iterable, iteratee, callback) {\n        return fn(iterable, limit, iteratee, callback);\n    };\n}\n\n// eachOf implementation optimized for array-likes\nfunction eachOfArrayLike(coll, iteratee, callback) {\n    callback = once(callback || noop);\n    var index = 0,\n        completed = 0,\n        length = coll.length;\n    if (length === 0) {\n        callback(null);\n    }\n\n    function iteratorCallback(err, value) {\n        if (err) {\n            callback(err);\n        } else if ((++completed === length) || value === breakLoop) {\n            callback(null);\n        }\n    }\n\n    for (; index < length; index++) {\n        iteratee(coll[index], index, onlyOnce(iteratorCallback));\n    }\n}\n\n// a generic version of eachOf which can handle array, object, and iterator cases.\nvar eachOfGeneric = doLimit(eachOfLimit, Infinity);\n\n/**\n * Like [`each`]{@link module:Collections.each}, except that it passes the key (or index) as the second argument\n * to the iteratee.\n *\n * @name eachOf\n * @static\n * @memberOf module:Collections\n * @method\n * @alias forEachOf\n * @category Collection\n * @see [async.each]{@link module:Collections.each}\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - A function to apply to each\n * item in `coll`.\n * The `key` is the item's key, or index in the case of an array.\n * Invoked with (item, key, callback).\n * @param {Function} [callback] - A callback which is called when all\n * `iteratee` functions have finished, or an error occurs. Invoked with (err).\n * @example\n *\n * var obj = {dev: \"/dev.json\", test: \"/test.json\", prod: \"/prod.json\"};\n * var configs = {};\n *\n * async.forEachOf(obj, function (value, key, callback) {\n *     fs.readFile(__dirname + value, \"utf8\", function (err, data) {\n *         if (err) return callback(err);\n *         try {\n *             configs[key] = JSON.parse(data);\n *         } catch (e) {\n *             return callback(e);\n *         }\n *         callback();\n *     });\n * }, function (err) {\n *     if (err) console.error(err.message);\n *     // configs is now a map of JSON data\n *     doSomethingWith(configs);\n * });\n */\nvar eachOf = function(coll, iteratee, callback) {\n    var eachOfImplementation = isArrayLike(coll) ? eachOfArrayLike : eachOfGeneric;\n    eachOfImplementation(coll, wrapAsync(iteratee), callback);\n};\n\nfunction doParallel(fn) {\n    return function (obj, iteratee, callback) {\n        return fn(eachOf, obj, wrapAsync(iteratee), callback);\n    };\n}\n\nfunction _asyncMap(eachfn, arr, iteratee, callback) {\n    callback = callback || noop;\n    arr = arr || [];\n    var results = [];\n    var counter = 0;\n    var _iteratee = wrapAsync(iteratee);\n\n    eachfn(arr, function (value, _, callback) {\n        var index = counter++;\n        _iteratee(value, function (err, v) {\n            results[index] = v;\n            callback(err);\n        });\n    }, function (err) {\n        callback(err, results);\n    });\n}\n\n/**\n * Produces a new collection of values by mapping each value in `coll` through\n * the `iteratee` function. The `iteratee` is called with an item from `coll`\n * and a callback for when it has finished processing. Each of these callback\n * takes 2 arguments: an `error`, and the transformed item from `coll`. If\n * `iteratee` passes an error to its callback, the main `callback` (for the\n * `map` function) is immediately called with the error.\n *\n * Note, that since this function applies the `iteratee` to each item in\n * parallel, there is no guarantee that the `iteratee` functions will complete\n * in order. However, the results array will be in the same order as the\n * original `coll`.\n *\n * If `map` is passed an Object, the results will be an Array.  The results\n * will roughly be in the order of the original Objects' keys (but this can\n * vary across JavaScript engines).\n *\n * @name map\n * @static\n * @memberOf module:Collections\n * @method\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The iteratee should complete with the transformed item.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. Results is an Array of the\n * transformed items from the `coll`. Invoked with (err, results).\n * @example\n *\n * async.map(['file1','file2','file3'], fs.stat, function(err, results) {\n *     // results is now an array of stats for each file\n * });\n */\nvar map = doParallel(_asyncMap);\n\n/**\n * Applies the provided arguments to each function in the array, calling\n * `callback` after all functions have completed. If you only provide the first\n * argument, `fns`, then it will return a function which lets you pass in the\n * arguments as if it were a single function call. If more arguments are\n * provided, `callback` is required while `args` is still optional.\n *\n * @name applyEach\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Array|Iterable|Object} fns - A collection of {@link AsyncFunction}s\n * to all call with the same arguments\n * @param {...*} [args] - any number of separate arguments to pass to the\n * function.\n * @param {Function} [callback] - the final argument should be the callback,\n * called when all functions have completed processing.\n * @returns {Function} - If only the first argument, `fns`, is provided, it will\n * return a function which lets you pass in the arguments as if it were a single\n * function call. The signature is `(..args, callback)`. If invoked with any\n * arguments, `callback` is required.\n * @example\n *\n * async.applyEach([enableSearch, updateSchema], 'bucket', callback);\n *\n * // partial application example:\n * async.each(\n *     buckets,\n *     async.applyEach([enableSearch, updateSchema]),\n *     callback\n * );\n */\nvar applyEach = applyEach$1(map);\n\nfunction doParallelLimit(fn) {\n    return function (obj, limit, iteratee, callback) {\n        return fn(_eachOfLimit(limit), obj, wrapAsync(iteratee), callback);\n    };\n}\n\n/**\n * The same as [`map`]{@link module:Collections.map} but runs a maximum of `limit` async operations at a time.\n *\n * @name mapLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.map]{@link module:Collections.map}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The iteratee should complete with the transformed item.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. Results is an array of the\n * transformed items from the `coll`. Invoked with (err, results).\n */\nvar mapLimit = doParallelLimit(_asyncMap);\n\n/**\n * The same as [`map`]{@link module:Collections.map} but runs only a single async operation at a time.\n *\n * @name mapSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.map]{@link module:Collections.map}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The iteratee should complete with the transformed item.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. Results is an array of the\n * transformed items from the `coll`. Invoked with (err, results).\n */\nvar mapSeries = doLimit(mapLimit, 1);\n\n/**\n * The same as [`applyEach`]{@link module:ControlFlow.applyEach} but runs only a single async operation at a time.\n *\n * @name applyEachSeries\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.applyEach]{@link module:ControlFlow.applyEach}\n * @category Control Flow\n * @param {Array|Iterable|Object} fns - A collection of {@link AsyncFunction}s to all\n * call with the same arguments\n * @param {...*} [args] - any number of separate arguments to pass to the\n * function.\n * @param {Function} [callback] - the final argument should be the callback,\n * called when all functions have completed processing.\n * @returns {Function} - If only the first argument is provided, it will return\n * a function which lets you pass in the arguments as if it were a single\n * function call.\n */\nvar applyEachSeries = applyEach$1(mapSeries);\n\n/**\n * A specialized version of `_.forEach` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns `array`.\n */\nfunction arrayEach(array, iteratee) {\n  var index = -1,\n      length = array == null ? 0 : array.length;\n\n  while (++index < length) {\n    if (iteratee(array[index], index, array) === false) {\n      break;\n    }\n  }\n  return array;\n}\n\n/**\n * Creates a base function for methods like `_.forIn` and `_.forOwn`.\n *\n * @private\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Function} Returns the new base function.\n */\nfunction createBaseFor(fromRight) {\n  return function(object, iteratee, keysFunc) {\n    var index = -1,\n        iterable = Object(object),\n        props = keysFunc(object),\n        length = props.length;\n\n    while (length--) {\n      var key = props[fromRight ? length : ++index];\n      if (iteratee(iterable[key], key, iterable) === false) {\n        break;\n      }\n    }\n    return object;\n  };\n}\n\n/**\n * The base implementation of `baseForOwn` which iterates over `object`\n * properties returned by `keysFunc` and invokes `iteratee` for each property.\n * Iteratee functions may exit iteration early by explicitly returning `false`.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @returns {Object} Returns `object`.\n */\nvar baseFor = createBaseFor();\n\n/**\n * The base implementation of `_.forOwn` without support for iteratee shorthands.\n *\n * @private\n * @param {Object} object The object to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Object} Returns `object`.\n */\nfunction baseForOwn(object, iteratee) {\n  return object && baseFor(object, iteratee, keys);\n}\n\n/**\n * The base implementation of `_.findIndex` and `_.findLastIndex` without\n * support for iteratee shorthands.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {Function} predicate The function invoked per iteration.\n * @param {number} fromIndex The index to search from.\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction baseFindIndex(array, predicate, fromIndex, fromRight) {\n  var length = array.length,\n      index = fromIndex + (fromRight ? 1 : -1);\n\n  while ((fromRight ? index-- : ++index < length)) {\n    if (predicate(array[index], index, array)) {\n      return index;\n    }\n  }\n  return -1;\n}\n\n/**\n * The base implementation of `_.isNaN` without support for number objects.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.\n */\nfunction baseIsNaN(value) {\n  return value !== value;\n}\n\n/**\n * A specialized version of `_.indexOf` which performs strict equality\n * comparisons of values, i.e. `===`.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} fromIndex The index to search from.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction strictIndexOf(array, value, fromIndex) {\n  var index = fromIndex - 1,\n      length = array.length;\n\n  while (++index < length) {\n    if (array[index] === value) {\n      return index;\n    }\n  }\n  return -1;\n}\n\n/**\n * The base implementation of `_.indexOf` without `fromIndex` bounds checks.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} value The value to search for.\n * @param {number} fromIndex The index to search from.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction baseIndexOf(array, value, fromIndex) {\n  return value === value\n    ? strictIndexOf(array, value, fromIndex)\n    : baseFindIndex(array, baseIsNaN, fromIndex);\n}\n\n/**\n * Determines the best order for running the {@link AsyncFunction}s in `tasks`, based on\n * their requirements. Each function can optionally depend on other functions\n * being completed first, and each function is run as soon as its requirements\n * are satisfied.\n *\n * If any of the {@link AsyncFunction}s pass an error to their callback, the `auto` sequence\n * will stop. Further tasks will not execute (so any other functions depending\n * on it will not run), and the main `callback` is immediately called with the\n * error.\n *\n * {@link AsyncFunction}s also receive an object containing the results of functions which\n * have completed so far as the first argument, if they have dependencies. If a\n * task function has no dependencies, it will only be passed a callback.\n *\n * @name auto\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Object} tasks - An object. Each of its properties is either a\n * function or an array of requirements, with the {@link AsyncFunction} itself the last item\n * in the array. The object's key of a property serves as the name of the task\n * defined by that property, i.e. can be used when specifying requirements for\n * other tasks. The function receives one or two arguments:\n * * a `results` object, containing the results of the previously executed\n *   functions, only passed if the task has any dependencies,\n * * a `callback(err, result)` function, which must be called when finished,\n *   passing an `error` (which can be `null`) and the result of the function's\n *   execution.\n * @param {number} [concurrency=Infinity] - An optional `integer` for\n * determining the maximum number of tasks that can be run in parallel. By\n * default, as many as possible.\n * @param {Function} [callback] - An optional callback which is called when all\n * the tasks have been completed. It receives the `err` argument if any `tasks`\n * pass an error to their callback. Results are always returned; however, if an\n * error occurs, no further `tasks` will be performed, and the results object\n * will only contain partial results. Invoked with (err, results).\n * @returns undefined\n * @example\n *\n * async.auto({\n *     // this function will just be passed a callback\n *     readData: async.apply(fs.readFile, 'data.txt', 'utf-8'),\n *     showData: ['readData', function(results, cb) {\n *         // results.readData is the file's contents\n *         // ...\n *     }]\n * }, callback);\n *\n * async.auto({\n *     get_data: function(callback) {\n *         console.log('in get_data');\n *         // async code to get some data\n *         callback(null, 'data', 'converted to array');\n *     },\n *     make_folder: function(callback) {\n *         console.log('in make_folder');\n *         // async code to create a directory to store a file in\n *         // this is run at the same time as getting the data\n *         callback(null, 'folder');\n *     },\n *     write_file: ['get_data', 'make_folder', function(results, callback) {\n *         console.log('in write_file', JSON.stringify(results));\n *         // once there is some data and the directory exists,\n *         // write the data to a file in the directory\n *         callback(null, 'filename');\n *     }],\n *     email_link: ['write_file', function(results, callback) {\n *         console.log('in email_link', JSON.stringify(results));\n *         // once the file is written let's email a link to it...\n *         // results.write_file contains the filename returned by write_file.\n *         callback(null, {'file':results.write_file, 'email':'user@example.com'});\n *     }]\n * }, function(err, results) {\n *     console.log('err = ', err);\n *     console.log('results = ', results);\n * });\n */\nvar auto = function (tasks, concurrency, callback) {\n    if (typeof concurrency === 'function') {\n        // concurrency is optional, shift the args.\n        callback = concurrency;\n        concurrency = null;\n    }\n    callback = once(callback || noop);\n    var keys$$1 = keys(tasks);\n    var numTasks = keys$$1.length;\n    if (!numTasks) {\n        return callback(null);\n    }\n    if (!concurrency) {\n        concurrency = numTasks;\n    }\n\n    var results = {};\n    var runningTasks = 0;\n    var hasError = false;\n\n    var listeners = Object.create(null);\n\n    var readyTasks = [];\n\n    // for cycle detection:\n    var readyToCheck = []; // tasks that have been identified as reachable\n    // without the possibility of returning to an ancestor task\n    var uncheckedDependencies = {};\n\n    baseForOwn(tasks, function (task, key) {\n        if (!isArray(task)) {\n            // no dependencies\n            enqueueTask(key, [task]);\n            readyToCheck.push(key);\n            return;\n        }\n\n        var dependencies = task.slice(0, task.length - 1);\n        var remainingDependencies = dependencies.length;\n        if (remainingDependencies === 0) {\n            enqueueTask(key, task);\n            readyToCheck.push(key);\n            return;\n        }\n        uncheckedDependencies[key] = remainingDependencies;\n\n        arrayEach(dependencies, function (dependencyName) {\n            if (!tasks[dependencyName]) {\n                throw new Error('async.auto task `' + key +\n                    '` has a non-existent dependency `' +\n                    dependencyName + '` in ' +\n                    dependencies.join(', '));\n            }\n            addListener(dependencyName, function () {\n                remainingDependencies--;\n                if (remainingDependencies === 0) {\n                    enqueueTask(key, task);\n                }\n            });\n        });\n    });\n\n    checkForDeadlocks();\n    processQueue();\n\n    function enqueueTask(key, task) {\n        readyTasks.push(function () {\n            runTask(key, task);\n        });\n    }\n\n    function processQueue() {\n        if (readyTasks.length === 0 && runningTasks === 0) {\n            return callback(null, results);\n        }\n        while(readyTasks.length && runningTasks < concurrency) {\n            var run = readyTasks.shift();\n            run();\n        }\n\n    }\n\n    function addListener(taskName, fn) {\n        var taskListeners = listeners[taskName];\n        if (!taskListeners) {\n            taskListeners = listeners[taskName] = [];\n        }\n\n        taskListeners.push(fn);\n    }\n\n    function taskComplete(taskName) {\n        var taskListeners = listeners[taskName] || [];\n        arrayEach(taskListeners, function (fn) {\n            fn();\n        });\n        processQueue();\n    }\n\n\n    function runTask(key, task) {\n        if (hasError) return;\n\n        var taskCallback = onlyOnce(function(err, result) {\n            runningTasks--;\n            if (arguments.length > 2) {\n                result = slice(arguments, 1);\n            }\n            if (err) {\n                var safeResults = {};\n                baseForOwn(results, function(val, rkey) {\n                    safeResults[rkey] = val;\n                });\n                safeResults[key] = result;\n                hasError = true;\n                listeners = Object.create(null);\n\n                callback(err, safeResults);\n            } else {\n                results[key] = result;\n                taskComplete(key);\n            }\n        });\n\n        runningTasks++;\n        var taskFn = wrapAsync(task[task.length - 1]);\n        if (task.length > 1) {\n            taskFn(results, taskCallback);\n        } else {\n            taskFn(taskCallback);\n        }\n    }\n\n    function checkForDeadlocks() {\n        // Kahn's algorithm\n        // https://en.wikipedia.org/wiki/Topological_sorting#Kahn.27s_algorithm\n        // http://connalle.blogspot.com/2013/10/topological-sortingkahn-algorithm.html\n        var currentTask;\n        var counter = 0;\n        while (readyToCheck.length) {\n            currentTask = readyToCheck.pop();\n            counter++;\n            arrayEach(getDependents(currentTask), function (dependent) {\n                if (--uncheckedDependencies[dependent] === 0) {\n                    readyToCheck.push(dependent);\n                }\n            });\n        }\n\n        if (counter !== numTasks) {\n            throw new Error(\n                'async.auto cannot execute tasks due to a recursive dependency'\n            );\n        }\n    }\n\n    function getDependents(taskName) {\n        var result = [];\n        baseForOwn(tasks, function (task, key) {\n            if (isArray(task) && baseIndexOf(task, taskName, 0) >= 0) {\n                result.push(key);\n            }\n        });\n        return result;\n    }\n};\n\n/**\n * A specialized version of `_.map` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n */\nfunction arrayMap(array, iteratee) {\n  var index = -1,\n      length = array == null ? 0 : array.length,\n      result = Array(length);\n\n  while (++index < length) {\n    result[index] = iteratee(array[index], index, array);\n  }\n  return result;\n}\n\n/** `Object#toString` result references. */\nvar symbolTag = '[object Symbol]';\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n  return typeof value == 'symbol' ||\n    (isObjectLike(value) && baseGetTag(value) == symbolTag);\n}\n\n/** Used as references for various `Number` constants. */\nvar INFINITY = 1 / 0;\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol$1 ? Symbol$1.prototype : undefined;\nvar symbolToString = symbolProto ? symbolProto.toString : undefined;\n\n/**\n * The base implementation of `_.toString` which doesn't convert nullish\n * values to empty strings.\n *\n * @private\n * @param {*} value The value to process.\n * @returns {string} Returns the string.\n */\nfunction baseToString(value) {\n  // Exit early for strings to avoid a performance hit in some environments.\n  if (typeof value == 'string') {\n    return value;\n  }\n  if (isArray(value)) {\n    // Recursively convert values (susceptible to call stack limits).\n    return arrayMap(value, baseToString) + '';\n  }\n  if (isSymbol(value)) {\n    return symbolToString ? symbolToString.call(value) : '';\n  }\n  var result = (value + '');\n  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n}\n\n/**\n * The base implementation of `_.slice` without an iteratee call guard.\n *\n * @private\n * @param {Array} array The array to slice.\n * @param {number} [start=0] The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the slice of `array`.\n */\nfunction baseSlice(array, start, end) {\n  var index = -1,\n      length = array.length;\n\n  if (start < 0) {\n    start = -start > length ? 0 : (length + start);\n  }\n  end = end > length ? length : end;\n  if (end < 0) {\n    end += length;\n  }\n  length = start > end ? 0 : ((end - start) >>> 0);\n  start >>>= 0;\n\n  var result = Array(length);\n  while (++index < length) {\n    result[index] = array[index + start];\n  }\n  return result;\n}\n\n/**\n * Casts `array` to a slice if it's needed.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {number} start The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the cast slice.\n */\nfunction castSlice(array, start, end) {\n  var length = array.length;\n  end = end === undefined ? length : end;\n  return (!start && end >= length) ? array : baseSlice(array, start, end);\n}\n\n/**\n * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol\n * that is not found in the character symbols.\n *\n * @private\n * @param {Array} strSymbols The string symbols to inspect.\n * @param {Array} chrSymbols The character symbols to find.\n * @returns {number} Returns the index of the last unmatched string symbol.\n */\nfunction charsEndIndex(strSymbols, chrSymbols) {\n  var index = strSymbols.length;\n\n  while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}\n  return index;\n}\n\n/**\n * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol\n * that is not found in the character symbols.\n *\n * @private\n * @param {Array} strSymbols The string symbols to inspect.\n * @param {Array} chrSymbols The character symbols to find.\n * @returns {number} Returns the index of the first unmatched string symbol.\n */\nfunction charsStartIndex(strSymbols, chrSymbols) {\n  var index = -1,\n      length = strSymbols.length;\n\n  while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}\n  return index;\n}\n\n/**\n * Converts an ASCII `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction asciiToArray(string) {\n  return string.split('');\n}\n\n/** Used to compose unicode character classes. */\nvar rsAstralRange = '\\\\ud800-\\\\udfff';\nvar rsComboMarksRange = '\\\\u0300-\\\\u036f';\nvar reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f';\nvar rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff';\nvar rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange;\nvar rsVarRange = '\\\\ufe0e\\\\ufe0f';\n\n/** Used to compose unicode capture groups. */\nvar rsZWJ = '\\\\u200d';\n\n/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */\nvar reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboRange + rsVarRange + ']');\n\n/**\n * Checks if `string` contains Unicode symbols.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {boolean} Returns `true` if a symbol is found, else `false`.\n */\nfunction hasUnicode(string) {\n  return reHasUnicode.test(string);\n}\n\n/** Used to compose unicode character classes. */\nvar rsAstralRange$1 = '\\\\ud800-\\\\udfff';\nvar rsComboMarksRange$1 = '\\\\u0300-\\\\u036f';\nvar reComboHalfMarksRange$1 = '\\\\ufe20-\\\\ufe2f';\nvar rsComboSymbolsRange$1 = '\\\\u20d0-\\\\u20ff';\nvar rsComboRange$1 = rsComboMarksRange$1 + reComboHalfMarksRange$1 + rsComboSymbolsRange$1;\nvar rsVarRange$1 = '\\\\ufe0e\\\\ufe0f';\n\n/** Used to compose unicode capture groups. */\nvar rsAstral = '[' + rsAstralRange$1 + ']';\nvar rsCombo = '[' + rsComboRange$1 + ']';\nvar rsFitz = '\\\\ud83c[\\\\udffb-\\\\udfff]';\nvar rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')';\nvar rsNonAstral = '[^' + rsAstralRange$1 + ']';\nvar rsRegional = '(?:\\\\ud83c[\\\\udde6-\\\\uddff]){2}';\nvar rsSurrPair = '[\\\\ud800-\\\\udbff][\\\\udc00-\\\\udfff]';\nvar rsZWJ$1 = '\\\\u200d';\n\n/** Used to compose unicode regexes. */\nvar reOptMod = rsModifier + '?';\nvar rsOptVar = '[' + rsVarRange$1 + ']?';\nvar rsOptJoin = '(?:' + rsZWJ$1 + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*';\nvar rsSeq = rsOptVar + reOptMod + rsOptJoin;\nvar rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';\n\n/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */\nvar reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');\n\n/**\n * Converts a Unicode `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction unicodeToArray(string) {\n  return string.match(reUnicode) || [];\n}\n\n/**\n * Converts `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction stringToArray(string) {\n  return hasUnicode(string)\n    ? unicodeToArray(string)\n    : asciiToArray(string);\n}\n\n/**\n * Converts `value` to a string. An empty string is returned for `null`\n * and `undefined` values. The sign of `-0` is preserved.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.toString(null);\n * // => ''\n *\n * _.toString(-0);\n * // => '-0'\n *\n * _.toString([1, 2, 3]);\n * // => '1,2,3'\n */\nfunction toString(value) {\n  return value == null ? '' : baseToString(value);\n}\n\n/** Used to match leading and trailing whitespace. */\nvar reTrim = /^\\s+|\\s+$/g;\n\n/**\n * Removes leading and trailing whitespace or specified characters from `string`.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to trim.\n * @param {string} [chars=whitespace] The characters to trim.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {string} Returns the trimmed string.\n * @example\n *\n * _.trim('  abc  ');\n * // => 'abc'\n *\n * _.trim('-_-abc-_-', '_-');\n * // => 'abc'\n *\n * _.map(['  foo  ', '  bar  '], _.trim);\n * // => ['foo', 'bar']\n */\nfunction trim(string, chars, guard) {\n  string = toString(string);\n  if (string && (guard || chars === undefined)) {\n    return string.replace(reTrim, '');\n  }\n  if (!string || !(chars = baseToString(chars))) {\n    return string;\n  }\n  var strSymbols = stringToArray(string),\n      chrSymbols = stringToArray(chars),\n      start = charsStartIndex(strSymbols, chrSymbols),\n      end = charsEndIndex(strSymbols, chrSymbols) + 1;\n\n  return castSlice(strSymbols, start, end).join('');\n}\n\nvar FN_ARGS = /^(?:async\\s+)?(function)?\\s*[^\\(]*\\(\\s*([^\\)]*)\\)/m;\nvar FN_ARG_SPLIT = /,/;\nvar FN_ARG = /(=.+)?(\\s*)$/;\nvar STRIP_COMMENTS = /((\\/\\/.*$)|(\\/\\*[\\s\\S]*?\\*\\/))/mg;\n\nfunction parseParams(func) {\n    func = func.toString().replace(STRIP_COMMENTS, '');\n    func = func.match(FN_ARGS)[2].replace(' ', '');\n    func = func ? func.split(FN_ARG_SPLIT) : [];\n    func = func.map(function (arg){\n        return trim(arg.replace(FN_ARG, ''));\n    });\n    return func;\n}\n\n/**\n * A dependency-injected version of the [async.auto]{@link module:ControlFlow.auto} function. Dependent\n * tasks are specified as parameters to the function, after the usual callback\n * parameter, with the parameter names matching the names of the tasks it\n * depends on. This can provide even more readable task graphs which can be\n * easier to maintain.\n *\n * If a final callback is specified, the task results are similarly injected,\n * specified as named parameters after the initial error parameter.\n *\n * The autoInject function is purely syntactic sugar and its semantics are\n * otherwise equivalent to [async.auto]{@link module:ControlFlow.auto}.\n *\n * @name autoInject\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.auto]{@link module:ControlFlow.auto}\n * @category Control Flow\n * @param {Object} tasks - An object, each of whose properties is an {@link AsyncFunction} of\n * the form 'func([dependencies...], callback). The object's key of a property\n * serves as the name of the task defined by that property, i.e. can be used\n * when specifying requirements for other tasks.\n * * The `callback` parameter is a `callback(err, result)` which must be called\n *   when finished, passing an `error` (which can be `null`) and the result of\n *   the function's execution. The remaining parameters name other tasks on\n *   which the task is dependent, and the results from those tasks are the\n *   arguments of those parameters.\n * @param {Function} [callback] - An optional callback which is called when all\n * the tasks have been completed. It receives the `err` argument if any `tasks`\n * pass an error to their callback, and a `results` object with any completed\n * task results, similar to `auto`.\n * @example\n *\n * //  The example from `auto` can be rewritten as follows:\n * async.autoInject({\n *     get_data: function(callback) {\n *         // async code to get some data\n *         callback(null, 'data', 'converted to array');\n *     },\n *     make_folder: function(callback) {\n *         // async code to create a directory to store a file in\n *         // this is run at the same time as getting the data\n *         callback(null, 'folder');\n *     },\n *     write_file: function(get_data, make_folder, callback) {\n *         // once there is some data and the directory exists,\n *         // write the data to a file in the directory\n *         callback(null, 'filename');\n *     },\n *     email_link: function(write_file, callback) {\n *         // once the file is written let's email a link to it...\n *         // write_file contains the filename returned by write_file.\n *         callback(null, {'file':write_file, 'email':'user@example.com'});\n *     }\n * }, function(err, results) {\n *     console.log('err = ', err);\n *     console.log('email_link = ', results.email_link);\n * });\n *\n * // If you are using a JS minifier that mangles parameter names, `autoInject`\n * // will not work with plain functions, since the parameter names will be\n * // collapsed to a single letter identifier.  To work around this, you can\n * // explicitly specify the names of the parameters your task function needs\n * // in an array, similar to Angular.js dependency injection.\n *\n * // This still has an advantage over plain `auto`, since the results a task\n * // depends on are still spread into arguments.\n * async.autoInject({\n *     //...\n *     write_file: ['get_data', 'make_folder', function(get_data, make_folder, callback) {\n *         callback(null, 'filename');\n *     }],\n *     email_link: ['write_file', function(write_file, callback) {\n *         callback(null, {'file':write_file, 'email':'user@example.com'});\n *     }]\n *     //...\n * }, function(err, results) {\n *     console.log('err = ', err);\n *     console.log('email_link = ', results.email_link);\n * });\n */\nfunction autoInject(tasks, callback) {\n    var newTasks = {};\n\n    baseForOwn(tasks, function (taskFn, key) {\n        var params;\n        var fnIsAsync = isAsync(taskFn);\n        var hasNoDeps =\n            (!fnIsAsync && taskFn.length === 1) ||\n            (fnIsAsync && taskFn.length === 0);\n\n        if (isArray(taskFn)) {\n            params = taskFn.slice(0, -1);\n            taskFn = taskFn[taskFn.length - 1];\n\n            newTasks[key] = params.concat(params.length > 0 ? newTask : taskFn);\n        } else if (hasNoDeps) {\n            // no dependencies, use the function as-is\n            newTasks[key] = taskFn;\n        } else {\n            params = parseParams(taskFn);\n            if (taskFn.length === 0 && !fnIsAsync && params.length === 0) {\n                throw new Error(\"autoInject task functions require explicit parameters.\");\n            }\n\n            // remove callback param\n            if (!fnIsAsync) params.pop();\n\n            newTasks[key] = params.concat(newTask);\n        }\n\n        function newTask(results, taskCb) {\n            var newArgs = arrayMap(params, function (name) {\n                return results[name];\n            });\n            newArgs.push(taskCb);\n            wrapAsync(taskFn).apply(null, newArgs);\n        }\n    });\n\n    auto(newTasks, callback);\n}\n\n// Simple doubly linked list (https://en.wikipedia.org/wiki/Doubly_linked_list) implementation\n// used for queues. This implementation assumes that the node provided by the user can be modified\n// to adjust the next and last properties. We implement only the minimal functionality\n// for queue support.\nfunction DLL() {\n    this.head = this.tail = null;\n    this.length = 0;\n}\n\nfunction setInitial(dll, node) {\n    dll.length = 1;\n    dll.head = dll.tail = node;\n}\n\nDLL.prototype.removeLink = function(node) {\n    if (node.prev) node.prev.next = node.next;\n    else this.head = node.next;\n    if (node.next) node.next.prev = node.prev;\n    else this.tail = node.prev;\n\n    node.prev = node.next = null;\n    this.length -= 1;\n    return node;\n};\n\nDLL.prototype.empty = function () {\n    while(this.head) this.shift();\n    return this;\n};\n\nDLL.prototype.insertAfter = function(node, newNode) {\n    newNode.prev = node;\n    newNode.next = node.next;\n    if (node.next) node.next.prev = newNode;\n    else this.tail = newNode;\n    node.next = newNode;\n    this.length += 1;\n};\n\nDLL.prototype.insertBefore = function(node, newNode) {\n    newNode.prev = node.prev;\n    newNode.next = node;\n    if (node.prev) node.prev.next = newNode;\n    else this.head = newNode;\n    node.prev = newNode;\n    this.length += 1;\n};\n\nDLL.prototype.unshift = function(node) {\n    if (this.head) this.insertBefore(this.head, node);\n    else setInitial(this, node);\n};\n\nDLL.prototype.push = function(node) {\n    if (this.tail) this.insertAfter(this.tail, node);\n    else setInitial(this, node);\n};\n\nDLL.prototype.shift = function() {\n    return this.head && this.removeLink(this.head);\n};\n\nDLL.prototype.pop = function() {\n    return this.tail && this.removeLink(this.tail);\n};\n\nDLL.prototype.toArray = function () {\n    var arr = Array(this.length);\n    var curr = this.head;\n    for(var idx = 0; idx < this.length; idx++) {\n        arr[idx] = curr.data;\n        curr = curr.next;\n    }\n    return arr;\n};\n\nDLL.prototype.remove = function (testFn) {\n    var curr = this.head;\n    while(!!curr) {\n        var next = curr.next;\n        if (testFn(curr)) {\n            this.removeLink(curr);\n        }\n        curr = next;\n    }\n    return this;\n};\n\nfunction queue(worker, concurrency, payload) {\n    if (concurrency == null) {\n        concurrency = 1;\n    }\n    else if(concurrency === 0) {\n        throw new Error('Concurrency must not be zero');\n    }\n\n    var _worker = wrapAsync(worker);\n    var numRunning = 0;\n    var workersList = [];\n\n    var processingScheduled = false;\n    function _insert(data, insertAtFront, callback) {\n        if (callback != null && typeof callback !== 'function') {\n            throw new Error('task callback must be a function');\n        }\n        q.started = true;\n        if (!isArray(data)) {\n            data = [data];\n        }\n        if (data.length === 0 && q.idle()) {\n            // call drain immediately if there are no tasks\n            return setImmediate$1(function() {\n                q.drain();\n            });\n        }\n\n        for (var i = 0, l = data.length; i < l; i++) {\n            var item = {\n                data: data[i],\n                callback: callback || noop\n            };\n\n            if (insertAtFront) {\n                q._tasks.unshift(item);\n            } else {\n                q._tasks.push(item);\n            }\n        }\n\n        if (!processingScheduled) {\n            processingScheduled = true;\n            setImmediate$1(function() {\n                processingScheduled = false;\n                q.process();\n            });\n        }\n    }\n\n    function _next(tasks) {\n        return function(err){\n            numRunning -= 1;\n\n            for (var i = 0, l = tasks.length; i < l; i++) {\n                var task = tasks[i];\n\n                var index = baseIndexOf(workersList, task, 0);\n                if (index === 0) {\n                    workersList.shift();\n                } else if (index > 0) {\n                    workersList.splice(index, 1);\n                }\n\n                task.callback.apply(task, arguments);\n\n                if (err != null) {\n                    q.error(err, task.data);\n                }\n            }\n\n            if (numRunning <= (q.concurrency - q.buffer) ) {\n                q.unsaturated();\n            }\n\n            if (q.idle()) {\n                q.drain();\n            }\n            q.process();\n        };\n    }\n\n    var isProcessing = false;\n    var q = {\n        _tasks: new DLL(),\n        concurrency: concurrency,\n        payload: payload,\n        saturated: noop,\n        unsaturated:noop,\n        buffer: concurrency / 4,\n        empty: noop,\n        drain: noop,\n        error: noop,\n        started: false,\n        paused: false,\n        push: function (data, callback) {\n            _insert(data, false, callback);\n        },\n        kill: function () {\n            q.drain = noop;\n            q._tasks.empty();\n        },\n        unshift: function (data, callback) {\n            _insert(data, true, callback);\n        },\n        remove: function (testFn) {\n            q._tasks.remove(testFn);\n        },\n        process: function () {\n            // Avoid trying to start too many processing operations. This can occur\n            // when callbacks resolve synchronously (#1267).\n            if (isProcessing) {\n                return;\n            }\n            isProcessing = true;\n            while(!q.paused && numRunning < q.concurrency && q._tasks.length){\n                var tasks = [], data = [];\n                var l = q._tasks.length;\n                if (q.payload) l = Math.min(l, q.payload);\n                for (var i = 0; i < l; i++) {\n                    var node = q._tasks.shift();\n                    tasks.push(node);\n                    workersList.push(node);\n                    data.push(node.data);\n                }\n\n                numRunning += 1;\n\n                if (q._tasks.length === 0) {\n                    q.empty();\n                }\n\n                if (numRunning === q.concurrency) {\n                    q.saturated();\n                }\n\n                var cb = onlyOnce(_next(tasks));\n                _worker(data, cb);\n            }\n            isProcessing = false;\n        },\n        length: function () {\n            return q._tasks.length;\n        },\n        running: function () {\n            return numRunning;\n        },\n        workersList: function () {\n            return workersList;\n        },\n        idle: function() {\n            return q._tasks.length + numRunning === 0;\n        },\n        pause: function () {\n            q.paused = true;\n        },\n        resume: function () {\n            if (q.paused === false) { return; }\n            q.paused = false;\n            setImmediate$1(q.process);\n        }\n    };\n    return q;\n}\n\n/**\n * A cargo of tasks for the worker function to complete. Cargo inherits all of\n * the same methods and event callbacks as [`queue`]{@link module:ControlFlow.queue}.\n * @typedef {Object} CargoObject\n * @memberOf module:ControlFlow\n * @property {Function} length - A function returning the number of items\n * waiting to be processed. Invoke like `cargo.length()`.\n * @property {number} payload - An `integer` for determining how many tasks\n * should be process per round. This property can be changed after a `cargo` is\n * created to alter the payload on-the-fly.\n * @property {Function} push - Adds `task` to the `queue`. The callback is\n * called once the `worker` has finished processing the task. Instead of a\n * single task, an array of `tasks` can be submitted. The respective callback is\n * used for every task in the list. Invoke like `cargo.push(task, [callback])`.\n * @property {Function} saturated - A callback that is called when the\n * `queue.length()` hits the concurrency and further tasks will be queued.\n * @property {Function} empty - A callback that is called when the last item\n * from the `queue` is given to a `worker`.\n * @property {Function} drain - A callback that is called when the last item\n * from the `queue` has returned from the `worker`.\n * @property {Function} idle - a function returning false if there are items\n * waiting or being processed, or true if not. Invoke like `cargo.idle()`.\n * @property {Function} pause - a function that pauses the processing of tasks\n * until `resume()` is called. Invoke like `cargo.pause()`.\n * @property {Function} resume - a function that resumes the processing of\n * queued tasks when the queue is paused. Invoke like `cargo.resume()`.\n * @property {Function} kill - a function that removes the `drain` callback and\n * empties remaining tasks from the queue forcing it to go idle. Invoke like `cargo.kill()`.\n */\n\n/**\n * Creates a `cargo` object with the specified payload. Tasks added to the\n * cargo will be processed altogether (up to the `payload` limit). If the\n * `worker` is in progress, the task is queued until it becomes available. Once\n * the `worker` has completed some tasks, each callback of those tasks is\n * called. Check out [these](https://camo.githubusercontent.com/6bbd36f4cf5b35a0f11a96dcd2e97711ffc2fb37/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130382f62626330636662302d356632392d313165322d393734662d3333393763363464633835382e676966) [animations](https://camo.githubusercontent.com/f4810e00e1c5f5f8addbe3e9f49064fd5d102699/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130312f38346339323036362d356632392d313165322d383134662d3964336430323431336266642e676966)\n * for how `cargo` and `queue` work.\n *\n * While [`queue`]{@link module:ControlFlow.queue} passes only one task to one of a group of workers\n * at a time, cargo passes an array of tasks to a single worker, repeating\n * when the worker is finished.\n *\n * @name cargo\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.queue]{@link module:ControlFlow.queue}\n * @category Control Flow\n * @param {AsyncFunction} worker - An asynchronous function for processing an array\n * of queued tasks. Invoked with `(tasks, callback)`.\n * @param {number} [payload=Infinity] - An optional `integer` for determining\n * how many tasks should be processed per round; if omitted, the default is\n * unlimited.\n * @returns {module:ControlFlow.CargoObject} A cargo object to manage the tasks. Callbacks can\n * attached as certain properties to listen for specific events during the\n * lifecycle of the cargo and inner queue.\n * @example\n *\n * // create a cargo object with payload 2\n * var cargo = async.cargo(function(tasks, callback) {\n *     for (var i=0; i<tasks.length; i++) {\n *         console.log('hello ' + tasks[i].name);\n *     }\n *     callback();\n * }, 2);\n *\n * // add some items\n * cargo.push({name: 'foo'}, function(err) {\n *     console.log('finished processing foo');\n * });\n * cargo.push({name: 'bar'}, function(err) {\n *     console.log('finished processing bar');\n * });\n * cargo.push({name: 'baz'}, function(err) {\n *     console.log('finished processing baz');\n * });\n */\nfunction cargo(worker, payload) {\n    return queue(worker, 1, payload);\n}\n\n/**\n * The same as [`eachOf`]{@link module:Collections.eachOf} but runs only a single async operation at a time.\n *\n * @name eachOfSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.eachOf]{@link module:Collections.eachOf}\n * @alias forEachOfSeries\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * Invoked with (item, key, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. Invoked with (err).\n */\nvar eachOfSeries = doLimit(eachOfLimit, 1);\n\n/**\n * Reduces `coll` into a single value using an async `iteratee` to return each\n * successive step. `memo` is the initial state of the reduction. This function\n * only operates in series.\n *\n * For performance reasons, it may make sense to split a call to this function\n * into a parallel map, and then use the normal `Array.prototype.reduce` on the\n * results. This function is for situations where each step in the reduction\n * needs to be async; if you can get the data before reducing it, then it's\n * probably a good idea to do so.\n *\n * @name reduce\n * @static\n * @memberOf module:Collections\n * @method\n * @alias inject\n * @alias foldl\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {*} memo - The initial state of the reduction.\n * @param {AsyncFunction} iteratee - A function applied to each item in the\n * array to produce the next step in the reduction.\n * The `iteratee` should complete with the next state of the reduction.\n * If the iteratee complete with an error, the reduction is stopped and the\n * main `callback` is immediately called with the error.\n * Invoked with (memo, item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Result is the reduced value. Invoked with\n * (err, result).\n * @example\n *\n * async.reduce([1,2,3], 0, function(memo, item, callback) {\n *     // pointless async:\n *     process.nextTick(function() {\n *         callback(null, memo + item)\n *     });\n * }, function(err, result) {\n *     // result is now equal to the last value of memo, which is 6\n * });\n */\nfunction reduce(coll, memo, iteratee, callback) {\n    callback = once(callback || noop);\n    var _iteratee = wrapAsync(iteratee);\n    eachOfSeries(coll, function(x, i, callback) {\n        _iteratee(memo, x, function(err, v) {\n            memo = v;\n            callback(err);\n        });\n    }, function(err) {\n        callback(err, memo);\n    });\n}\n\n/**\n * Version of the compose function that is more natural to read. Each function\n * consumes the return value of the previous function. It is the equivalent of\n * [compose]{@link module:ControlFlow.compose} with the arguments reversed.\n *\n * Each function is executed with the `this` binding of the composed function.\n *\n * @name seq\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.compose]{@link module:ControlFlow.compose}\n * @category Control Flow\n * @param {...AsyncFunction} functions - the asynchronous functions to compose\n * @returns {Function} a function that composes the `functions` in order\n * @example\n *\n * // Requires lodash (or underscore), express3 and dresende's orm2.\n * // Part of an app, that fetches cats of the logged user.\n * // This example uses `seq` function to avoid overnesting and error\n * // handling clutter.\n * app.get('/cats', function(request, response) {\n *     var User = request.models.User;\n *     async.seq(\n *         _.bind(User.get, User),  // 'User.get' has signature (id, callback(err, data))\n *         function(user, fn) {\n *             user.getCats(fn);      // 'getCats' has signature (callback(err, data))\n *         }\n *     )(req.session.user_id, function (err, cats) {\n *         if (err) {\n *             console.error(err);\n *             response.json({ status: 'error', message: err.message });\n *         } else {\n *             response.json({ status: 'ok', message: 'Cats found', data: cats });\n *         }\n *     });\n * });\n */\nfunction seq(/*...functions*/) {\n    var _functions = arrayMap(arguments, wrapAsync);\n    return function(/*...args*/) {\n        var args = slice(arguments);\n        var that = this;\n\n        var cb = args[args.length - 1];\n        if (typeof cb == 'function') {\n            args.pop();\n        } else {\n            cb = noop;\n        }\n\n        reduce(_functions, args, function(newargs, fn, cb) {\n            fn.apply(that, newargs.concat(function(err/*, ...nextargs*/) {\n                var nextargs = slice(arguments, 1);\n                cb(err, nextargs);\n            }));\n        },\n        function(err, results) {\n            cb.apply(that, [err].concat(results));\n        });\n    };\n}\n\n/**\n * Creates a function which is a composition of the passed asynchronous\n * functions. Each function consumes the return value of the function that\n * follows. Composing functions `f()`, `g()`, and `h()` would produce the result\n * of `f(g(h()))`, only this version uses callbacks to obtain the return values.\n *\n * Each function is executed with the `this` binding of the composed function.\n *\n * @name compose\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {...AsyncFunction} functions - the asynchronous functions to compose\n * @returns {Function} an asynchronous function that is the composed\n * asynchronous `functions`\n * @example\n *\n * function add1(n, callback) {\n *     setTimeout(function () {\n *         callback(null, n + 1);\n *     }, 10);\n * }\n *\n * function mul3(n, callback) {\n *     setTimeout(function () {\n *         callback(null, n * 3);\n *     }, 10);\n * }\n *\n * var add1mul3 = async.compose(mul3, add1);\n * add1mul3(4, function (err, result) {\n *     // result now equals 15\n * });\n */\nvar compose = function(/*...args*/) {\n    return seq.apply(null, slice(arguments).reverse());\n};\n\nvar _concat = Array.prototype.concat;\n\n/**\n * The same as [`concat`]{@link module:Collections.concat} but runs a maximum of `limit` async operations at a time.\n *\n * @name concatLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.concat]{@link module:Collections.concat}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - A function to apply to each item in `coll`,\n * which should use an array as its result. Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished, or an error occurs. Results is an array\n * containing the concatenated results of the `iteratee` function. Invoked with\n * (err, results).\n */\nvar concatLimit = function(coll, limit, iteratee, callback) {\n    callback = callback || noop;\n    var _iteratee = wrapAsync(iteratee);\n    mapLimit(coll, limit, function(val, callback) {\n        _iteratee(val, function(err /*, ...args*/) {\n            if (err) return callback(err);\n            return callback(null, slice(arguments, 1));\n        });\n    }, function(err, mapResults) {\n        var result = [];\n        for (var i = 0; i < mapResults.length; i++) {\n            if (mapResults[i]) {\n                result = _concat.apply(result, mapResults[i]);\n            }\n        }\n\n        return callback(err, result);\n    });\n};\n\n/**\n * Applies `iteratee` to each item in `coll`, concatenating the results. Returns\n * the concatenated list. The `iteratee`s are called in parallel, and the\n * results are concatenated as they return. There is no guarantee that the\n * results array will be returned in the original order of `coll` passed to the\n * `iteratee` function.\n *\n * @name concat\n * @static\n * @memberOf module:Collections\n * @method\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - A function to apply to each item in `coll`,\n * which should use an array as its result. Invoked with (item, callback).\n * @param {Function} [callback(err)] - A callback which is called after all the\n * `iteratee` functions have finished, or an error occurs. Results is an array\n * containing the concatenated results of the `iteratee` function. Invoked with\n * (err, results).\n * @example\n *\n * async.concat(['dir1','dir2','dir3'], fs.readdir, function(err, files) {\n *     // files is now a list of filenames that exist in the 3 directories\n * });\n */\nvar concat = doLimit(concatLimit, Infinity);\n\n/**\n * The same as [`concat`]{@link module:Collections.concat} but runs only a single async operation at a time.\n *\n * @name concatSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.concat]{@link module:Collections.concat}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - A function to apply to each item in `coll`.\n * The iteratee should complete with an array an array of results.\n * Invoked with (item, callback).\n * @param {Function} [callback(err)] - A callback which is called after all the\n * `iteratee` functions have finished, or an error occurs. Results is an array\n * containing the concatenated results of the `iteratee` function. Invoked with\n * (err, results).\n */\nvar concatSeries = doLimit(concatLimit, 1);\n\n/**\n * Returns a function that when called, calls-back with the values provided.\n * Useful as the first function in a [`waterfall`]{@link module:ControlFlow.waterfall}, or for plugging values in to\n * [`auto`]{@link module:ControlFlow.auto}.\n *\n * @name constant\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {...*} arguments... - Any number of arguments to automatically invoke\n * callback with.\n * @returns {AsyncFunction} Returns a function that when invoked, automatically\n * invokes the callback with the previous given arguments.\n * @example\n *\n * async.waterfall([\n *     async.constant(42),\n *     function (value, next) {\n *         // value === 42\n *     },\n *     //...\n * ], callback);\n *\n * async.waterfall([\n *     async.constant(filename, \"utf8\"),\n *     fs.readFile,\n *     function (fileData, next) {\n *         //...\n *     }\n *     //...\n * ], callback);\n *\n * async.auto({\n *     hostname: async.constant(\"https://server.net/\"),\n *     port: findFreePort,\n *     launchServer: [\"hostname\", \"port\", function (options, cb) {\n *         startServer(options, cb);\n *     }],\n *     //...\n * }, callback);\n */\nvar constant = function(/*...values*/) {\n    var values = slice(arguments);\n    var args = [null].concat(values);\n    return function (/*...ignoredArgs, callback*/) {\n        var callback = arguments[arguments.length - 1];\n        return callback.apply(this, args);\n    };\n};\n\n/**\n * This method returns the first argument it receives.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Util\n * @param {*} value Any value.\n * @returns {*} Returns `value`.\n * @example\n *\n * var object = { 'a': 1 };\n *\n * console.log(_.identity(object) === object);\n * // => true\n */\nfunction identity(value) {\n  return value;\n}\n\nfunction _createTester(check, getResult) {\n    return function(eachfn, arr, iteratee, cb) {\n        cb = cb || noop;\n        var testPassed = false;\n        var testResult;\n        eachfn(arr, function(value, _, callback) {\n            iteratee(value, function(err, result) {\n                if (err) {\n                    callback(err);\n                } else if (check(result) && !testResult) {\n                    testPassed = true;\n                    testResult = getResult(true, value);\n                    callback(null, breakLoop);\n                } else {\n                    callback();\n                }\n            });\n        }, function(err) {\n            if (err) {\n                cb(err);\n            } else {\n                cb(null, testPassed ? testResult : getResult(false));\n            }\n        });\n    };\n}\n\nfunction _findGetResult(v, x) {\n    return x;\n}\n\n/**\n * Returns the first value in `coll` that passes an async truth test. The\n * `iteratee` is applied in parallel, meaning the first iteratee to return\n * `true` will fire the detect `callback` with that result. That means the\n * result might not be the first item in the original `coll` (in terms of order)\n * that passes the test.\n\n * If order within the original `coll` is important, then look at\n * [`detectSeries`]{@link module:Collections.detectSeries}.\n *\n * @name detect\n * @static\n * @memberOf module:Collections\n * @method\n * @alias find\n * @category Collections\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - A truth test to apply to each item in `coll`.\n * The iteratee must complete with a boolean value as its result.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called as soon as any\n * iteratee returns `true`, or after all the `iteratee` functions have finished.\n * Result will be the first item in the array that passes the truth test\n * (iteratee) or the value `undefined` if none passed. Invoked with\n * (err, result).\n * @example\n *\n * async.detect(['file1','file2','file3'], function(filePath, callback) {\n *     fs.access(filePath, function(err) {\n *         callback(null, !err)\n *     });\n * }, function(err, result) {\n *     // result now equals the first file in the list that exists\n * });\n */\nvar detect = doParallel(_createTester(identity, _findGetResult));\n\n/**\n * The same as [`detect`]{@link module:Collections.detect} but runs a maximum of `limit` async operations at a\n * time.\n *\n * @name detectLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.detect]{@link module:Collections.detect}\n * @alias findLimit\n * @category Collections\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - A truth test to apply to each item in `coll`.\n * The iteratee must complete with a boolean value as its result.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called as soon as any\n * iteratee returns `true`, or after all the `iteratee` functions have finished.\n * Result will be the first item in the array that passes the truth test\n * (iteratee) or the value `undefined` if none passed. Invoked with\n * (err, result).\n */\nvar detectLimit = doParallelLimit(_createTester(identity, _findGetResult));\n\n/**\n * The same as [`detect`]{@link module:Collections.detect} but runs only a single async operation at a time.\n *\n * @name detectSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.detect]{@link module:Collections.detect}\n * @alias findSeries\n * @category Collections\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - A truth test to apply to each item in `coll`.\n * The iteratee must complete with a boolean value as its result.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called as soon as any\n * iteratee returns `true`, or after all the `iteratee` functions have finished.\n * Result will be the first item in the array that passes the truth test\n * (iteratee) or the value `undefined` if none passed. Invoked with\n * (err, result).\n */\nvar detectSeries = doLimit(detectLimit, 1);\n\nfunction consoleFunc(name) {\n    return function (fn/*, ...args*/) {\n        var args = slice(arguments, 1);\n        args.push(function (err/*, ...args*/) {\n            var args = slice(arguments, 1);\n            if (typeof console === 'object') {\n                if (err) {\n                    if (console.error) {\n                        console.error(err);\n                    }\n                } else if (console[name]) {\n                    arrayEach(args, function (x) {\n                        console[name](x);\n                    });\n                }\n            }\n        });\n        wrapAsync(fn).apply(null, args);\n    };\n}\n\n/**\n * Logs the result of an [`async` function]{@link AsyncFunction} to the\n * `console` using `console.dir` to display the properties of the resulting object.\n * Only works in Node.js or in browsers that support `console.dir` and\n * `console.error` (such as FF and Chrome).\n * If multiple arguments are returned from the async function,\n * `console.dir` is called on each argument in order.\n *\n * @name dir\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {AsyncFunction} function - The function you want to eventually apply\n * all arguments to.\n * @param {...*} arguments... - Any number of arguments to apply to the function.\n * @example\n *\n * // in a module\n * var hello = function(name, callback) {\n *     setTimeout(function() {\n *         callback(null, {hello: name});\n *     }, 1000);\n * };\n *\n * // in the node repl\n * node> async.dir(hello, 'world');\n * {hello: 'world'}\n */\nvar dir = consoleFunc('dir');\n\n/**\n * The post-check version of [`during`]{@link module:ControlFlow.during}. To reflect the difference in\n * the order of operations, the arguments `test` and `fn` are switched.\n *\n * Also a version of [`doWhilst`]{@link module:ControlFlow.doWhilst} with asynchronous `test` function.\n * @name doDuring\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.during]{@link module:ControlFlow.during}\n * @category Control Flow\n * @param {AsyncFunction} fn - An async function which is called each time\n * `test` passes. Invoked with (callback).\n * @param {AsyncFunction} test - asynchronous truth test to perform before each\n * execution of `fn`. Invoked with (...args, callback), where `...args` are the\n * non-error args from the previous callback of `fn`.\n * @param {Function} [callback] - A callback which is called after the test\n * function has failed and repeated execution of `fn` has stopped. `callback`\n * will be passed an error if one occurred, otherwise `null`.\n */\nfunction doDuring(fn, test, callback) {\n    callback = onlyOnce(callback || noop);\n    var _fn = wrapAsync(fn);\n    var _test = wrapAsync(test);\n\n    function next(err/*, ...args*/) {\n        if (err) return callback(err);\n        var args = slice(arguments, 1);\n        args.push(check);\n        _test.apply(this, args);\n    }\n\n    function check(err, truth) {\n        if (err) return callback(err);\n        if (!truth) return callback(null);\n        _fn(next);\n    }\n\n    check(null, true);\n\n}\n\n/**\n * The post-check version of [`whilst`]{@link module:ControlFlow.whilst}. To reflect the difference in\n * the order of operations, the arguments `test` and `iteratee` are switched.\n *\n * `doWhilst` is to `whilst` as `do while` is to `while` in plain JavaScript.\n *\n * @name doWhilst\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.whilst]{@link module:ControlFlow.whilst}\n * @category Control Flow\n * @param {AsyncFunction} iteratee - A function which is called each time `test`\n * passes. Invoked with (callback).\n * @param {Function} test - synchronous truth test to perform after each\n * execution of `iteratee`. Invoked with any non-error callback results of\n * `iteratee`.\n * @param {Function} [callback] - A callback which is called after the test\n * function has failed and repeated execution of `iteratee` has stopped.\n * `callback` will be passed an error and any arguments passed to the final\n * `iteratee`'s callback. Invoked with (err, [results]);\n */\nfunction doWhilst(iteratee, test, callback) {\n    callback = onlyOnce(callback || noop);\n    var _iteratee = wrapAsync(iteratee);\n    var next = function(err/*, ...args*/) {\n        if (err) return callback(err);\n        var args = slice(arguments, 1);\n        if (test.apply(this, args)) return _iteratee(next);\n        callback.apply(null, [null].concat(args));\n    };\n    _iteratee(next);\n}\n\n/**\n * Like ['doWhilst']{@link module:ControlFlow.doWhilst}, except the `test` is inverted. Note the\n * argument ordering differs from `until`.\n *\n * @name doUntil\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.doWhilst]{@link module:ControlFlow.doWhilst}\n * @category Control Flow\n * @param {AsyncFunction} iteratee - An async function which is called each time\n * `test` fails. Invoked with (callback).\n * @param {Function} test - synchronous truth test to perform after each\n * execution of `iteratee`. Invoked with any non-error callback results of\n * `iteratee`.\n * @param {Function} [callback] - A callback which is called after the test\n * function has passed and repeated execution of `iteratee` has stopped. `callback`\n * will be passed an error and any arguments passed to the final `iteratee`'s\n * callback. Invoked with (err, [results]);\n */\nfunction doUntil(iteratee, test, callback) {\n    doWhilst(iteratee, function() {\n        return !test.apply(this, arguments);\n    }, callback);\n}\n\n/**\n * Like [`whilst`]{@link module:ControlFlow.whilst}, except the `test` is an asynchronous function that\n * is passed a callback in the form of `function (err, truth)`. If error is\n * passed to `test` or `fn`, the main callback is immediately called with the\n * value of the error.\n *\n * @name during\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.whilst]{@link module:ControlFlow.whilst}\n * @category Control Flow\n * @param {AsyncFunction} test - asynchronous truth test to perform before each\n * execution of `fn`. Invoked with (callback).\n * @param {AsyncFunction} fn - An async function which is called each time\n * `test` passes. Invoked with (callback).\n * @param {Function} [callback] - A callback which is called after the test\n * function has failed and repeated execution of `fn` has stopped. `callback`\n * will be passed an error, if one occurred, otherwise `null`.\n * @example\n *\n * var count = 0;\n *\n * async.during(\n *     function (callback) {\n *         return callback(null, count < 5);\n *     },\n *     function (callback) {\n *         count++;\n *         setTimeout(callback, 1000);\n *     },\n *     function (err) {\n *         // 5 seconds have passed\n *     }\n * );\n */\nfunction during(test, fn, callback) {\n    callback = onlyOnce(callback || noop);\n    var _fn = wrapAsync(fn);\n    var _test = wrapAsync(test);\n\n    function next(err) {\n        if (err) return callback(err);\n        _test(check);\n    }\n\n    function check(err, truth) {\n        if (err) return callback(err);\n        if (!truth) return callback(null);\n        _fn(next);\n    }\n\n    _test(check);\n}\n\nfunction _withoutIndex(iteratee) {\n    return function (value, index, callback) {\n        return iteratee(value, callback);\n    };\n}\n\n/**\n * Applies the function `iteratee` to each item in `coll`, in parallel.\n * The `iteratee` is called with an item from the list, and a callback for when\n * it has finished. If the `iteratee` passes an error to its `callback`, the\n * main `callback` (for the `each` function) is immediately called with the\n * error.\n *\n * Note, that since this function applies `iteratee` to each item in parallel,\n * there is no guarantee that the iteratee functions will complete in order.\n *\n * @name each\n * @static\n * @memberOf module:Collections\n * @method\n * @alias forEach\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async function to apply to\n * each item in `coll`. Invoked with (item, callback).\n * The array index is not passed to the iteratee.\n * If you need the index, use `eachOf`.\n * @param {Function} [callback] - A callback which is called when all\n * `iteratee` functions have finished, or an error occurs. Invoked with (err).\n * @example\n *\n * // assuming openFiles is an array of file names and saveFile is a function\n * // to save the modified contents of that file:\n *\n * async.each(openFiles, saveFile, function(err){\n *   // if any of the saves produced an error, err would equal that error\n * });\n *\n * // assuming openFiles is an array of file names\n * async.each(openFiles, function(file, callback) {\n *\n *     // Perform operation on file here.\n *     console.log('Processing file ' + file);\n *\n *     if( file.length > 32 ) {\n *       console.log('This file name is too long');\n *       callback('File name too long');\n *     } else {\n *       // Do work to process file here\n *       console.log('File processed');\n *       callback();\n *     }\n * }, function(err) {\n *     // if any of the file processing produced an error, err would equal that error\n *     if( err ) {\n *       // One of the iterations produced an error.\n *       // All processing will now stop.\n *       console.log('A file failed to process');\n *     } else {\n *       console.log('All files have been processed successfully');\n *     }\n * });\n */\nfunction eachLimit(coll, iteratee, callback) {\n    eachOf(coll, _withoutIndex(wrapAsync(iteratee)), callback);\n}\n\n/**\n * The same as [`each`]{@link module:Collections.each} but runs a maximum of `limit` async operations at a time.\n *\n * @name eachLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.each]{@link module:Collections.each}\n * @alias forEachLimit\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The array index is not passed to the iteratee.\n * If you need the index, use `eachOfLimit`.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called when all\n * `iteratee` functions have finished, or an error occurs. Invoked with (err).\n */\nfunction eachLimit$1(coll, limit, iteratee, callback) {\n    _eachOfLimit(limit)(coll, _withoutIndex(wrapAsync(iteratee)), callback);\n}\n\n/**\n * The same as [`each`]{@link module:Collections.each} but runs only a single async operation at a time.\n *\n * @name eachSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.each]{@link module:Collections.each}\n * @alias forEachSeries\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async function to apply to each\n * item in `coll`.\n * The array index is not passed to the iteratee.\n * If you need the index, use `eachOfSeries`.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called when all\n * `iteratee` functions have finished, or an error occurs. Invoked with (err).\n */\nvar eachSeries = doLimit(eachLimit$1, 1);\n\n/**\n * Wrap an async function and ensure it calls its callback on a later tick of\n * the event loop.  If the function already calls its callback on a next tick,\n * no extra deferral is added. This is useful for preventing stack overflows\n * (`RangeError: Maximum call stack size exceeded`) and generally keeping\n * [Zalgo](http://blog.izs.me/post/59142742143/designing-apis-for-asynchrony)\n * contained. ES2017 `async` functions are returned as-is -- they are immune\n * to Zalgo's corrupting influences, as they always resolve on a later tick.\n *\n * @name ensureAsync\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {AsyncFunction} fn - an async function, one that expects a node-style\n * callback as its last argument.\n * @returns {AsyncFunction} Returns a wrapped function with the exact same call\n * signature as the function passed in.\n * @example\n *\n * function sometimesAsync(arg, callback) {\n *     if (cache[arg]) {\n *         return callback(null, cache[arg]); // this would be synchronous!!\n *     } else {\n *         doSomeIO(arg, callback); // this IO would be asynchronous\n *     }\n * }\n *\n * // this has a risk of stack overflows if many results are cached in a row\n * async.mapSeries(args, sometimesAsync, done);\n *\n * // this will defer sometimesAsync's callback if necessary,\n * // preventing stack overflows\n * async.mapSeries(args, async.ensureAsync(sometimesAsync), done);\n */\nfunction ensureAsync(fn) {\n    if (isAsync(fn)) return fn;\n    return initialParams(function (args, callback) {\n        var sync = true;\n        args.push(function () {\n            var innerArgs = arguments;\n            if (sync) {\n                setImmediate$1(function () {\n                    callback.apply(null, innerArgs);\n                });\n            } else {\n                callback.apply(null, innerArgs);\n            }\n        });\n        fn.apply(this, args);\n        sync = false;\n    });\n}\n\nfunction notId(v) {\n    return !v;\n}\n\n/**\n * Returns `true` if every element in `coll` satisfies an async test. If any\n * iteratee call returns `false`, the main `callback` is immediately called.\n *\n * @name every\n * @static\n * @memberOf module:Collections\n * @method\n * @alias all\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async truth test to apply to each item\n * in the collection in parallel.\n * The iteratee must complete with a boolean result value.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Result will be either `true` or `false`\n * depending on the values of the async tests. Invoked with (err, result).\n * @example\n *\n * async.every(['file1','file2','file3'], function(filePath, callback) {\n *     fs.access(filePath, function(err) {\n *         callback(null, !err)\n *     });\n * }, function(err, result) {\n *     // if result is true then every file exists\n * });\n */\nvar every = doParallel(_createTester(notId, notId));\n\n/**\n * The same as [`every`]{@link module:Collections.every} but runs a maximum of `limit` async operations at a time.\n *\n * @name everyLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.every]{@link module:Collections.every}\n * @alias allLimit\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - An async truth test to apply to each item\n * in the collection in parallel.\n * The iteratee must complete with a boolean result value.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Result will be either `true` or `false`\n * depending on the values of the async tests. Invoked with (err, result).\n */\nvar everyLimit = doParallelLimit(_createTester(notId, notId));\n\n/**\n * The same as [`every`]{@link module:Collections.every} but runs only a single async operation at a time.\n *\n * @name everySeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.every]{@link module:Collections.every}\n * @alias allSeries\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async truth test to apply to each item\n * in the collection in series.\n * The iteratee must complete with a boolean result value.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Result will be either `true` or `false`\n * depending on the values of the async tests. Invoked with (err, result).\n */\nvar everySeries = doLimit(everyLimit, 1);\n\n/**\n * The base implementation of `_.property` without support for deep paths.\n *\n * @private\n * @param {string} key The key of the property to get.\n * @returns {Function} Returns the new accessor function.\n */\nfunction baseProperty(key) {\n  return function(object) {\n    return object == null ? undefined : object[key];\n  };\n}\n\nfunction filterArray(eachfn, arr, iteratee, callback) {\n    var truthValues = new Array(arr.length);\n    eachfn(arr, function (x, index, callback) {\n        iteratee(x, function (err, v) {\n            truthValues[index] = !!v;\n            callback(err);\n        });\n    }, function (err) {\n        if (err) return callback(err);\n        var results = [];\n        for (var i = 0; i < arr.length; i++) {\n            if (truthValues[i]) results.push(arr[i]);\n        }\n        callback(null, results);\n    });\n}\n\nfunction filterGeneric(eachfn, coll, iteratee, callback) {\n    var results = [];\n    eachfn(coll, function (x, index, callback) {\n        iteratee(x, function (err, v) {\n            if (err) {\n                callback(err);\n            } else {\n                if (v) {\n                    results.push({index: index, value: x});\n                }\n                callback();\n            }\n        });\n    }, function (err) {\n        if (err) {\n            callback(err);\n        } else {\n            callback(null, arrayMap(results.sort(function (a, b) {\n                return a.index - b.index;\n            }), baseProperty('value')));\n        }\n    });\n}\n\nfunction _filter(eachfn, coll, iteratee, callback) {\n    var filter = isArrayLike(coll) ? filterArray : filterGeneric;\n    filter(eachfn, coll, wrapAsync(iteratee), callback || noop);\n}\n\n/**\n * Returns a new array of all the values in `coll` which pass an async truth\n * test. This operation is performed in parallel, but the results array will be\n * in the same order as the original.\n *\n * @name filter\n * @static\n * @memberOf module:Collections\n * @method\n * @alias select\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {Function} iteratee - A truth test to apply to each item in `coll`.\n * The `iteratee` is passed a `callback(err, truthValue)`, which must be called\n * with a boolean argument once it has completed. Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Invoked with (err, results).\n * @example\n *\n * async.filter(['file1','file2','file3'], function(filePath, callback) {\n *     fs.access(filePath, function(err) {\n *         callback(null, !err)\n *     });\n * }, function(err, results) {\n *     // results now equals an array of the existing files\n * });\n */\nvar filter = doParallel(_filter);\n\n/**\n * The same as [`filter`]{@link module:Collections.filter} but runs a maximum of `limit` async operations at a\n * time.\n *\n * @name filterLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.filter]{@link module:Collections.filter}\n * @alias selectLimit\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {Function} iteratee - A truth test to apply to each item in `coll`.\n * The `iteratee` is passed a `callback(err, truthValue)`, which must be called\n * with a boolean argument once it has completed. Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Invoked with (err, results).\n */\nvar filterLimit = doParallelLimit(_filter);\n\n/**\n * The same as [`filter`]{@link module:Collections.filter} but runs only a single async operation at a time.\n *\n * @name filterSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.filter]{@link module:Collections.filter}\n * @alias selectSeries\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {Function} iteratee - A truth test to apply to each item in `coll`.\n * The `iteratee` is passed a `callback(err, truthValue)`, which must be called\n * with a boolean argument once it has completed. Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Invoked with (err, results)\n */\nvar filterSeries = doLimit(filterLimit, 1);\n\n/**\n * Calls the asynchronous function `fn` with a callback parameter that allows it\n * to call itself again, in series, indefinitely.\n\n * If an error is passed to the callback then `errback` is called with the\n * error, and execution stops, otherwise it will never be called.\n *\n * @name forever\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {AsyncFunction} fn - an async function to call repeatedly.\n * Invoked with (next).\n * @param {Function} [errback] - when `fn` passes an error to it's callback,\n * this function will be called, and execution stops. Invoked with (err).\n * @example\n *\n * async.forever(\n *     function(next) {\n *         // next is suitable for passing to things that need a callback(err [, whatever]);\n *         // it will result in this function being called again.\n *     },\n *     function(err) {\n *         // if next is called with a value in its first parameter, it will appear\n *         // in here as 'err', and execution will stop.\n *     }\n * );\n */\nfunction forever(fn, errback) {\n    var done = onlyOnce(errback || noop);\n    var task = wrapAsync(ensureAsync(fn));\n\n    function next(err) {\n        if (err) return done(err);\n        task(next);\n    }\n    next();\n}\n\n/**\n * The same as [`groupBy`]{@link module:Collections.groupBy} but runs a maximum of `limit` async operations at a time.\n *\n * @name groupByLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.groupBy]{@link module:Collections.groupBy}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The iteratee should complete with a `key` to group the value under.\n * Invoked with (value, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. Result is an `Object` whoses\n * properties are arrays of values which returned the corresponding key.\n */\nvar groupByLimit = function(coll, limit, iteratee, callback) {\n    callback = callback || noop;\n    var _iteratee = wrapAsync(iteratee);\n    mapLimit(coll, limit, function(val, callback) {\n        _iteratee(val, function(err, key) {\n            if (err) return callback(err);\n            return callback(null, {key: key, val: val});\n        });\n    }, function(err, mapResults) {\n        var result = {};\n        // from MDN, handle object having an `hasOwnProperty` prop\n        var hasOwnProperty = Object.prototype.hasOwnProperty;\n\n        for (var i = 0; i < mapResults.length; i++) {\n            if (mapResults[i]) {\n                var key = mapResults[i].key;\n                var val = mapResults[i].val;\n\n                if (hasOwnProperty.call(result, key)) {\n                    result[key].push(val);\n                } else {\n                    result[key] = [val];\n                }\n            }\n        }\n\n        return callback(err, result);\n    });\n};\n\n/**\n * Returns a new object, where each value corresponds to an array of items, from\n * `coll`, that returned the corresponding key. That is, the keys of the object\n * correspond to the values passed to the `iteratee` callback.\n *\n * Note: Since this function applies the `iteratee` to each item in parallel,\n * there is no guarantee that the `iteratee` functions will complete in order.\n * However, the values for each key in the `result` will be in the same order as\n * the original `coll`. For Objects, the values will roughly be in the order of\n * the original Objects' keys (but this can vary across JavaScript engines).\n *\n * @name groupBy\n * @static\n * @memberOf module:Collections\n * @method\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The iteratee should complete with a `key` to group the value under.\n * Invoked with (value, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. Result is an `Object` whoses\n * properties are arrays of values which returned the corresponding key.\n * @example\n *\n * async.groupBy(['userId1', 'userId2', 'userId3'], function(userId, callback) {\n *     db.findById(userId, function(err, user) {\n *         if (err) return callback(err);\n *         return callback(null, user.age);\n *     });\n * }, function(err, result) {\n *     // result is object containing the userIds grouped by age\n *     // e.g. { 30: ['userId1', 'userId3'], 42: ['userId2']};\n * });\n */\nvar groupBy = doLimit(groupByLimit, Infinity);\n\n/**\n * The same as [`groupBy`]{@link module:Collections.groupBy} but runs only a single async operation at a time.\n *\n * @name groupBySeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.groupBy]{@link module:Collections.groupBy}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The iteratee should complete with a `key` to group the value under.\n * Invoked with (value, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. Result is an `Object` whoses\n * properties are arrays of values which returned the corresponding key.\n */\nvar groupBySeries = doLimit(groupByLimit, 1);\n\n/**\n * Logs the result of an `async` function to the `console`. Only works in\n * Node.js or in browsers that support `console.log` and `console.error` (such\n * as FF and Chrome). If multiple arguments are returned from the async\n * function, `console.log` is called on each argument in order.\n *\n * @name log\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {AsyncFunction} function - The function you want to eventually apply\n * all arguments to.\n * @param {...*} arguments... - Any number of arguments to apply to the function.\n * @example\n *\n * // in a module\n * var hello = function(name, callback) {\n *     setTimeout(function() {\n *         callback(null, 'hello ' + name);\n *     }, 1000);\n * };\n *\n * // in the node repl\n * node> async.log(hello, 'world');\n * 'hello world'\n */\nvar log = consoleFunc('log');\n\n/**\n * The same as [`mapValues`]{@link module:Collections.mapValues} but runs a maximum of `limit` async operations at a\n * time.\n *\n * @name mapValuesLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.mapValues]{@link module:Collections.mapValues}\n * @category Collection\n * @param {Object} obj - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - A function to apply to each value and key\n * in `coll`.\n * The iteratee should complete with the transformed value as its result.\n * Invoked with (value, key, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. `result` is a new object consisting\n * of each key from `obj`, with each transformed value on the right-hand side.\n * Invoked with (err, result).\n */\nfunction mapValuesLimit(obj, limit, iteratee, callback) {\n    callback = once(callback || noop);\n    var newObj = {};\n    var _iteratee = wrapAsync(iteratee);\n    eachOfLimit(obj, limit, function(val, key, next) {\n        _iteratee(val, key, function (err, result) {\n            if (err) return next(err);\n            newObj[key] = result;\n            next();\n        });\n    }, function (err) {\n        callback(err, newObj);\n    });\n}\n\n/**\n * A relative of [`map`]{@link module:Collections.map}, designed for use with objects.\n *\n * Produces a new Object by mapping each value of `obj` through the `iteratee`\n * function. The `iteratee` is called each `value` and `key` from `obj` and a\n * callback for when it has finished processing. Each of these callbacks takes\n * two arguments: an `error`, and the transformed item from `obj`. If `iteratee`\n * passes an error to its callback, the main `callback` (for the `mapValues`\n * function) is immediately called with the error.\n *\n * Note, the order of the keys in the result is not guaranteed.  The keys will\n * be roughly in the order they complete, (but this is very engine-specific)\n *\n * @name mapValues\n * @static\n * @memberOf module:Collections\n * @method\n * @category Collection\n * @param {Object} obj - A collection to iterate over.\n * @param {AsyncFunction} iteratee - A function to apply to each value and key\n * in `coll`.\n * The iteratee should complete with the transformed value as its result.\n * Invoked with (value, key, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. `result` is a new object consisting\n * of each key from `obj`, with each transformed value on the right-hand side.\n * Invoked with (err, result).\n * @example\n *\n * async.mapValues({\n *     f1: 'file1',\n *     f2: 'file2',\n *     f3: 'file3'\n * }, function (file, key, callback) {\n *   fs.stat(file, callback);\n * }, function(err, result) {\n *     // result is now a map of stats for each file, e.g.\n *     // {\n *     //     f1: [stats for file1],\n *     //     f2: [stats for file2],\n *     //     f3: [stats for file3]\n *     // }\n * });\n */\n\nvar mapValues = doLimit(mapValuesLimit, Infinity);\n\n/**\n * The same as [`mapValues`]{@link module:Collections.mapValues} but runs only a single async operation at a time.\n *\n * @name mapValuesSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.mapValues]{@link module:Collections.mapValues}\n * @category Collection\n * @param {Object} obj - A collection to iterate over.\n * @param {AsyncFunction} iteratee - A function to apply to each value and key\n * in `coll`.\n * The iteratee should complete with the transformed value as its result.\n * Invoked with (value, key, callback).\n * @param {Function} [callback] - A callback which is called when all `iteratee`\n * functions have finished, or an error occurs. `result` is a new object consisting\n * of each key from `obj`, with each transformed value on the right-hand side.\n * Invoked with (err, result).\n */\nvar mapValuesSeries = doLimit(mapValuesLimit, 1);\n\nfunction has(obj, key) {\n    return key in obj;\n}\n\n/**\n * Caches the results of an async function. When creating a hash to store\n * function results against, the callback is omitted from the hash and an\n * optional hash function can be used.\n *\n * If no hash function is specified, the first argument is used as a hash key,\n * which may work reasonably if it is a string or a data type that converts to a\n * distinct string. Note that objects and arrays will not behave reasonably.\n * Neither will cases where the other arguments are significant. In such cases,\n * specify your own hash function.\n *\n * The cache of results is exposed as the `memo` property of the function\n * returned by `memoize`.\n *\n * @name memoize\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {AsyncFunction} fn - The async function to proxy and cache results from.\n * @param {Function} hasher - An optional function for generating a custom hash\n * for storing results. It has all the arguments applied to it apart from the\n * callback, and must be synchronous.\n * @returns {AsyncFunction} a memoized version of `fn`\n * @example\n *\n * var slow_fn = function(name, callback) {\n *     // do something\n *     callback(null, result);\n * };\n * var fn = async.memoize(slow_fn);\n *\n * // fn can now be used as if it were slow_fn\n * fn('some name', function() {\n *     // callback\n * });\n */\nfunction memoize(fn, hasher) {\n    var memo = Object.create(null);\n    var queues = Object.create(null);\n    hasher = hasher || identity;\n    var _fn = wrapAsync(fn);\n    var memoized = initialParams(function memoized(args, callback) {\n        var key = hasher.apply(null, args);\n        if (has(memo, key)) {\n            setImmediate$1(function() {\n                callback.apply(null, memo[key]);\n            });\n        } else if (has(queues, key)) {\n            queues[key].push(callback);\n        } else {\n            queues[key] = [callback];\n            _fn.apply(null, args.concat(function(/*args*/) {\n                var args = slice(arguments);\n                memo[key] = args;\n                var q = queues[key];\n                delete queues[key];\n                for (var i = 0, l = q.length; i < l; i++) {\n                    q[i].apply(null, args);\n                }\n            }));\n        }\n    });\n    memoized.memo = memo;\n    memoized.unmemoized = fn;\n    return memoized;\n}\n\n/**\n * Calls `callback` on a later loop around the event loop. In Node.js this just\n * calls `process.nextTicl`.  In the browser it will use `setImmediate` if\n * available, otherwise `setTimeout(callback, 0)`, which means other higher\n * priority events may precede the execution of `callback`.\n *\n * This is used internally for browser-compatibility purposes.\n *\n * @name nextTick\n * @static\n * @memberOf module:Utils\n * @method\n * @see [async.setImmediate]{@link module:Utils.setImmediate}\n * @category Util\n * @param {Function} callback - The function to call on a later loop around\n * the event loop. Invoked with (args...).\n * @param {...*} args... - any number of additional arguments to pass to the\n * callback on the next tick.\n * @example\n *\n * var call_order = [];\n * async.nextTick(function() {\n *     call_order.push('two');\n *     // call_order now equals ['one','two']\n * });\n * call_order.push('one');\n *\n * async.setImmediate(function (a, b, c) {\n *     // a, b, and c equal 1, 2, and 3\n * }, 1, 2, 3);\n */\nvar _defer$1;\n\nif (hasNextTick) {\n    _defer$1 = process.nextTick;\n} else if (hasSetImmediate) {\n    _defer$1 = setImmediate;\n} else {\n    _defer$1 = fallback;\n}\n\nvar nextTick = wrap(_defer$1);\n\nfunction _parallel(eachfn, tasks, callback) {\n    callback = callback || noop;\n    var results = isArrayLike(tasks) ? [] : {};\n\n    eachfn(tasks, function (task, key, callback) {\n        wrapAsync(task)(function (err, result) {\n            if (arguments.length > 2) {\n                result = slice(arguments, 1);\n            }\n            results[key] = result;\n            callback(err);\n        });\n    }, function (err) {\n        callback(err, results);\n    });\n}\n\n/**\n * Run the `tasks` collection of functions in parallel, without waiting until\n * the previous function has completed. If any of the functions pass an error to\n * its callback, the main `callback` is immediately called with the value of the\n * error. Once the `tasks` have completed, the results are passed to the final\n * `callback` as an array.\n *\n * **Note:** `parallel` is about kicking-off I/O tasks in parallel, not about\n * parallel execution of code.  If your tasks do not use any timers or perform\n * any I/O, they will actually be executed in series.  Any synchronous setup\n * sections for each task will happen one after the other.  JavaScript remains\n * single-threaded.\n *\n * **Hint:** Use [`reflect`]{@link module:Utils.reflect} to continue the\n * execution of other tasks when a task fails.\n *\n * It is also possible to use an object instead of an array. Each property will\n * be run as a function and the results will be passed to the final `callback`\n * as an object instead of an array. This can be a more readable way of handling\n * results from {@link async.parallel}.\n *\n * @name parallel\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Array|Iterable|Object} tasks - A collection of\n * [async functions]{@link AsyncFunction} to run.\n * Each async function can complete with any number of optional `result` values.\n * @param {Function} [callback] - An optional callback to run once all the\n * functions have completed successfully. This function gets a results array\n * (or object) containing all the result arguments passed to the task callbacks.\n * Invoked with (err, results).\n *\n * @example\n * async.parallel([\n *     function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'one');\n *         }, 200);\n *     },\n *     function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'two');\n *         }, 100);\n *     }\n * ],\n * // optional callback\n * function(err, results) {\n *     // the results array will equal ['one','two'] even though\n *     // the second function had a shorter timeout.\n * });\n *\n * // an example using an object instead of an array\n * async.parallel({\n *     one: function(callback) {\n *         setTimeout(function() {\n *             callback(null, 1);\n *         }, 200);\n *     },\n *     two: function(callback) {\n *         setTimeout(function() {\n *             callback(null, 2);\n *         }, 100);\n *     }\n * }, function(err, results) {\n *     // results is now equals to: {one: 1, two: 2}\n * });\n */\nfunction parallelLimit(tasks, callback) {\n    _parallel(eachOf, tasks, callback);\n}\n\n/**\n * The same as [`parallel`]{@link module:ControlFlow.parallel} but runs a maximum of `limit` async operations at a\n * time.\n *\n * @name parallelLimit\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.parallel]{@link module:ControlFlow.parallel}\n * @category Control Flow\n * @param {Array|Iterable|Object} tasks - A collection of\n * [async functions]{@link AsyncFunction} to run.\n * Each async function can complete with any number of optional `result` values.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {Function} [callback] - An optional callback to run once all the\n * functions have completed successfully. This function gets a results array\n * (or object) containing all the result arguments passed to the task callbacks.\n * Invoked with (err, results).\n */\nfunction parallelLimit$1(tasks, limit, callback) {\n    _parallel(_eachOfLimit(limit), tasks, callback);\n}\n\n/**\n * A queue of tasks for the worker function to complete.\n * @typedef {Object} QueueObject\n * @memberOf module:ControlFlow\n * @property {Function} length - a function returning the number of items\n * waiting to be processed. Invoke with `queue.length()`.\n * @property {boolean} started - a boolean indicating whether or not any\n * items have been pushed and processed by the queue.\n * @property {Function} running - a function returning the number of items\n * currently being processed. Invoke with `queue.running()`.\n * @property {Function} workersList - a function returning the array of items\n * currently being processed. Invoke with `queue.workersList()`.\n * @property {Function} idle - a function returning false if there are items\n * waiting or being processed, or true if not. Invoke with `queue.idle()`.\n * @property {number} concurrency - an integer for determining how many `worker`\n * functions should be run in parallel. This property can be changed after a\n * `queue` is created to alter the concurrency on-the-fly.\n * @property {Function} push - add a new task to the `queue`. Calls `callback`\n * once the `worker` has finished processing the task. Instead of a single task,\n * a `tasks` array can be submitted. The respective callback is used for every\n * task in the list. Invoke with `queue.push(task, [callback])`,\n * @property {Function} unshift - add a new task to the front of the `queue`.\n * Invoke with `queue.unshift(task, [callback])`.\n * @property {Function} remove - remove items from the queue that match a test\n * function.  The test function will be passed an object with a `data` property,\n * and a `priority` property, if this is a\n * [priorityQueue]{@link module:ControlFlow.priorityQueue} object.\n * Invoked with `queue.remove(testFn)`, where `testFn` is of the form\n * `function ({data, priority}) {}` and returns a Boolean.\n * @property {Function} saturated - a callback that is called when the number of\n * running workers hits the `concurrency` limit, and further tasks will be\n * queued.\n * @property {Function} unsaturated - a callback that is called when the number\n * of running workers is less than the `concurrency` & `buffer` limits, and\n * further tasks will not be queued.\n * @property {number} buffer - A minimum threshold buffer in order to say that\n * the `queue` is `unsaturated`.\n * @property {Function} empty - a callback that is called when the last item\n * from the `queue` is given to a `worker`.\n * @property {Function} drain - a callback that is called when the last item\n * from the `queue` has returned from the `worker`.\n * @property {Function} error - a callback that is called when a task errors.\n * Has the signature `function(error, task)`.\n * @property {boolean} paused - a boolean for determining whether the queue is\n * in a paused state.\n * @property {Function} pause - a function that pauses the processing of tasks\n * until `resume()` is called. Invoke with `queue.pause()`.\n * @property {Function} resume - a function that resumes the processing of\n * queued tasks when the queue is paused. Invoke with `queue.resume()`.\n * @property {Function} kill - a function that removes the `drain` callback and\n * empties remaining tasks from the queue forcing it to go idle. No more tasks\n * should be pushed to the queue after calling this function. Invoke with `queue.kill()`.\n */\n\n/**\n * Creates a `queue` object with the specified `concurrency`. Tasks added to the\n * `queue` are processed in parallel (up to the `concurrency` limit). If all\n * `worker`s are in progress, the task is queued until one becomes available.\n * Once a `worker` completes a `task`, that `task`'s callback is called.\n *\n * @name queue\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {AsyncFunction} worker - An async function for processing a queued task.\n * If you want to handle errors from an individual task, pass a callback to\n * `q.push()`. Invoked with (task, callback).\n * @param {number} [concurrency=1] - An `integer` for determining how many\n * `worker` functions should be run in parallel.  If omitted, the concurrency\n * defaults to `1`.  If the concurrency is `0`, an error is thrown.\n * @returns {module:ControlFlow.QueueObject} A queue object to manage the tasks. Callbacks can\n * attached as certain properties to listen for specific events during the\n * lifecycle of the queue.\n * @example\n *\n * // create a queue object with concurrency 2\n * var q = async.queue(function(task, callback) {\n *     console.log('hello ' + task.name);\n *     callback();\n * }, 2);\n *\n * // assign a callback\n * q.drain = function() {\n *     console.log('all items have been processed');\n * };\n *\n * // add some items to the queue\n * q.push({name: 'foo'}, function(err) {\n *     console.log('finished processing foo');\n * });\n * q.push({name: 'bar'}, function (err) {\n *     console.log('finished processing bar');\n * });\n *\n * // add some items to the queue (batch-wise)\n * q.push([{name: 'baz'},{name: 'bay'},{name: 'bax'}], function(err) {\n *     console.log('finished processing item');\n * });\n *\n * // add some items to the front of the queue\n * q.unshift({name: 'bar'}, function (err) {\n *     console.log('finished processing bar');\n * });\n */\nvar queue$1 = function (worker, concurrency) {\n    var _worker = wrapAsync(worker);\n    return queue(function (items, cb) {\n        _worker(items[0], cb);\n    }, concurrency, 1);\n};\n\n/**\n * The same as [async.queue]{@link module:ControlFlow.queue} only tasks are assigned a priority and\n * completed in ascending priority order.\n *\n * @name priorityQueue\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.queue]{@link module:ControlFlow.queue}\n * @category Control Flow\n * @param {AsyncFunction} worker - An async function for processing a queued task.\n * If you want to handle errors from an individual task, pass a callback to\n * `q.push()`.\n * Invoked with (task, callback).\n * @param {number} concurrency - An `integer` for determining how many `worker`\n * functions should be run in parallel.  If omitted, the concurrency defaults to\n * `1`.  If the concurrency is `0`, an error is thrown.\n * @returns {module:ControlFlow.QueueObject} A priorityQueue object to manage the tasks. There are two\n * differences between `queue` and `priorityQueue` objects:\n * * `push(task, priority, [callback])` - `priority` should be a number. If an\n *   array of `tasks` is given, all tasks will be assigned the same priority.\n * * The `unshift` method was removed.\n */\nvar priorityQueue = function(worker, concurrency) {\n    // Start with a normal queue\n    var q = queue$1(worker, concurrency);\n\n    // Override push to accept second parameter representing priority\n    q.push = function(data, priority, callback) {\n        if (callback == null) callback = noop;\n        if (typeof callback !== 'function') {\n            throw new Error('task callback must be a function');\n        }\n        q.started = true;\n        if (!isArray(data)) {\n            data = [data];\n        }\n        if (data.length === 0) {\n            // call drain immediately if there are no tasks\n            return setImmediate$1(function() {\n                q.drain();\n            });\n        }\n\n        priority = priority || 0;\n        var nextNode = q._tasks.head;\n        while (nextNode && priority >= nextNode.priority) {\n            nextNode = nextNode.next;\n        }\n\n        for (var i = 0, l = data.length; i < l; i++) {\n            var item = {\n                data: data[i],\n                priority: priority,\n                callback: callback\n            };\n\n            if (nextNode) {\n                q._tasks.insertBefore(nextNode, item);\n            } else {\n                q._tasks.push(item);\n            }\n        }\n        setImmediate$1(q.process);\n    };\n\n    // Remove unshift function\n    delete q.unshift;\n\n    return q;\n};\n\n/**\n * Runs the `tasks` array of functions in parallel, without waiting until the\n * previous function has completed. Once any of the `tasks` complete or pass an\n * error to its callback, the main `callback` is immediately called. It's\n * equivalent to `Promise.race()`.\n *\n * @name race\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Array} tasks - An array containing [async functions]{@link AsyncFunction}\n * to run. Each function can complete with an optional `result` value.\n * @param {Function} callback - A callback to run once any of the functions have\n * completed. This function gets an error or result from the first function that\n * completed. Invoked with (err, result).\n * @returns undefined\n * @example\n *\n * async.race([\n *     function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'one');\n *         }, 200);\n *     },\n *     function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'two');\n *         }, 100);\n *     }\n * ],\n * // main callback\n * function(err, result) {\n *     // the result will be equal to 'two' as it finishes earlier\n * });\n */\nfunction race(tasks, callback) {\n    callback = once(callback || noop);\n    if (!isArray(tasks)) return callback(new TypeError('First argument to race must be an array of functions'));\n    if (!tasks.length) return callback();\n    for (var i = 0, l = tasks.length; i < l; i++) {\n        wrapAsync(tasks[i])(callback);\n    }\n}\n\n/**\n * Same as [`reduce`]{@link module:Collections.reduce}, only operates on `array` in reverse order.\n *\n * @name reduceRight\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.reduce]{@link module:Collections.reduce}\n * @alias foldr\n * @category Collection\n * @param {Array} array - A collection to iterate over.\n * @param {*} memo - The initial state of the reduction.\n * @param {AsyncFunction} iteratee - A function applied to each item in the\n * array to produce the next step in the reduction.\n * The `iteratee` should complete with the next state of the reduction.\n * If the iteratee complete with an error, the reduction is stopped and the\n * main `callback` is immediately called with the error.\n * Invoked with (memo, item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Result is the reduced value. Invoked with\n * (err, result).\n */\nfunction reduceRight (array, memo, iteratee, callback) {\n    var reversed = slice(array).reverse();\n    reduce(reversed, memo, iteratee, callback);\n}\n\n/**\n * Wraps the async function in another function that always completes with a\n * result object, even when it errors.\n *\n * The result object has either the property `error` or `value`.\n *\n * @name reflect\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {AsyncFunction} fn - The async function you want to wrap\n * @returns {Function} - A function that always passes null to it's callback as\n * the error. The second argument to the callback will be an `object` with\n * either an `error` or a `value` property.\n * @example\n *\n * async.parallel([\n *     async.reflect(function(callback) {\n *         // do some stuff ...\n *         callback(null, 'one');\n *     }),\n *     async.reflect(function(callback) {\n *         // do some more stuff but error ...\n *         callback('bad stuff happened');\n *     }),\n *     async.reflect(function(callback) {\n *         // do some more stuff ...\n *         callback(null, 'two');\n *     })\n * ],\n * // optional callback\n * function(err, results) {\n *     // values\n *     // results[0].value = 'one'\n *     // results[1].error = 'bad stuff happened'\n *     // results[2].value = 'two'\n * });\n */\nfunction reflect(fn) {\n    var _fn = wrapAsync(fn);\n    return initialParams(function reflectOn(args, reflectCallback) {\n        args.push(function callback(error, cbArg) {\n            if (error) {\n                reflectCallback(null, { error: error });\n            } else {\n                var value;\n                if (arguments.length <= 2) {\n                    value = cbArg;\n                } else {\n                    value = slice(arguments, 1);\n                }\n                reflectCallback(null, { value: value });\n            }\n        });\n\n        return _fn.apply(this, args);\n    });\n}\n\n/**\n * A helper function that wraps an array or an object of functions with `reflect`.\n *\n * @name reflectAll\n * @static\n * @memberOf module:Utils\n * @method\n * @see [async.reflect]{@link module:Utils.reflect}\n * @category Util\n * @param {Array|Object|Iterable} tasks - The collection of\n * [async functions]{@link AsyncFunction} to wrap in `async.reflect`.\n * @returns {Array} Returns an array of async functions, each wrapped in\n * `async.reflect`\n * @example\n *\n * let tasks = [\n *     function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'one');\n *         }, 200);\n *     },\n *     function(callback) {\n *         // do some more stuff but error ...\n *         callback(new Error('bad stuff happened'));\n *     },\n *     function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'two');\n *         }, 100);\n *     }\n * ];\n *\n * async.parallel(async.reflectAll(tasks),\n * // optional callback\n * function(err, results) {\n *     // values\n *     // results[0].value = 'one'\n *     // results[1].error = Error('bad stuff happened')\n *     // results[2].value = 'two'\n * });\n *\n * // an example using an object instead of an array\n * let tasks = {\n *     one: function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'one');\n *         }, 200);\n *     },\n *     two: function(callback) {\n *         callback('two');\n *     },\n *     three: function(callback) {\n *         setTimeout(function() {\n *             callback(null, 'three');\n *         }, 100);\n *     }\n * };\n *\n * async.parallel(async.reflectAll(tasks),\n * // optional callback\n * function(err, results) {\n *     // values\n *     // results.one.value = 'one'\n *     // results.two.error = 'two'\n *     // results.three.value = 'three'\n * });\n */\nfunction reflectAll(tasks) {\n    var results;\n    if (isArray(tasks)) {\n        results = arrayMap(tasks, reflect);\n    } else {\n        results = {};\n        baseForOwn(tasks, function(task, key) {\n            results[key] = reflect.call(this, task);\n        });\n    }\n    return results;\n}\n\nfunction reject$1(eachfn, arr, iteratee, callback) {\n    _filter(eachfn, arr, function(value, cb) {\n        iteratee(value, function(err, v) {\n            cb(err, !v);\n        });\n    }, callback);\n}\n\n/**\n * The opposite of [`filter`]{@link module:Collections.filter}. Removes values that pass an `async` truth test.\n *\n * @name reject\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.filter]{@link module:Collections.filter}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {Function} iteratee - An async truth test to apply to each item in\n * `coll`.\n * The should complete with a boolean value as its `result`.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Invoked with (err, results).\n * @example\n *\n * async.reject(['file1','file2','file3'], function(filePath, callback) {\n *     fs.access(filePath, function(err) {\n *         callback(null, !err)\n *     });\n * }, function(err, results) {\n *     // results now equals an array of missing files\n *     createFiles(results);\n * });\n */\nvar reject = doParallel(reject$1);\n\n/**\n * The same as [`reject`]{@link module:Collections.reject} but runs a maximum of `limit` async operations at a\n * time.\n *\n * @name rejectLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.reject]{@link module:Collections.reject}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {Function} iteratee - An async truth test to apply to each item in\n * `coll`.\n * The should complete with a boolean value as its `result`.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Invoked with (err, results).\n */\nvar rejectLimit = doParallelLimit(reject$1);\n\n/**\n * The same as [`reject`]{@link module:Collections.reject} but runs only a single async operation at a time.\n *\n * @name rejectSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.reject]{@link module:Collections.reject}\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {Function} iteratee - An async truth test to apply to each item in\n * `coll`.\n * The should complete with a boolean value as its `result`.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Invoked with (err, results).\n */\nvar rejectSeries = doLimit(rejectLimit, 1);\n\n/**\n * Creates a function that returns `value`.\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Util\n * @param {*} value The value to return from the new function.\n * @returns {Function} Returns the new constant function.\n * @example\n *\n * var objects = _.times(2, _.constant({ 'a': 1 }));\n *\n * console.log(objects);\n * // => [{ 'a': 1 }, { 'a': 1 }]\n *\n * console.log(objects[0] === objects[1]);\n * // => true\n */\nfunction constant$1(value) {\n  return function() {\n    return value;\n  };\n}\n\n/**\n * Attempts to get a successful response from `task` no more than `times` times\n * before returning an error. If the task is successful, the `callback` will be\n * passed the result of the successful task. If all attempts fail, the callback\n * will be passed the error and result (if any) of the final attempt.\n *\n * @name retry\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @see [async.retryable]{@link module:ControlFlow.retryable}\n * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - Can be either an\n * object with `times` and `interval` or a number.\n * * `times` - The number of attempts to make before giving up.  The default\n *   is `5`.\n * * `interval` - The time to wait between retries, in milliseconds.  The\n *   default is `0`. The interval may also be specified as a function of the\n *   retry count (see example).\n * * `errorFilter` - An optional synchronous function that is invoked on\n *   erroneous result. If it returns `true` the retry attempts will continue;\n *   if the function returns `false` the retry flow is aborted with the current\n *   attempt's error and result being returned to the final callback.\n *   Invoked with (err).\n * * If `opts` is a number, the number specifies the number of times to retry,\n *   with the default interval of `0`.\n * @param {AsyncFunction} task - An async function to retry.\n * Invoked with (callback).\n * @param {Function} [callback] - An optional callback which is called when the\n * task has succeeded, or after the final failed attempt. It receives the `err`\n * and `result` arguments of the last attempt at completing the `task`. Invoked\n * with (err, results).\n *\n * @example\n *\n * // The `retry` function can be used as a stand-alone control flow by passing\n * // a callback, as shown below:\n *\n * // try calling apiMethod 3 times\n * async.retry(3, apiMethod, function(err, result) {\n *     // do something with the result\n * });\n *\n * // try calling apiMethod 3 times, waiting 200 ms between each retry\n * async.retry({times: 3, interval: 200}, apiMethod, function(err, result) {\n *     // do something with the result\n * });\n *\n * // try calling apiMethod 10 times with exponential backoff\n * // (i.e. intervals of 100, 200, 400, 800, 1600, ... milliseconds)\n * async.retry({\n *   times: 10,\n *   interval: function(retryCount) {\n *     return 50 * Math.pow(2, retryCount);\n *   }\n * }, apiMethod, function(err, result) {\n *     // do something with the result\n * });\n *\n * // try calling apiMethod the default 5 times no delay between each retry\n * async.retry(apiMethod, function(err, result) {\n *     // do something with the result\n * });\n *\n * // try calling apiMethod only when error condition satisfies, all other\n * // errors will abort the retry control flow and return to final callback\n * async.retry({\n *   errorFilter: function(err) {\n *     return err.message === 'Temporary error'; // only retry on a specific error\n *   }\n * }, apiMethod, function(err, result) {\n *     // do something with the result\n * });\n *\n * // to retry individual methods that are not as reliable within other\n * // control flow functions, use the `retryable` wrapper:\n * async.auto({\n *     users: api.getUsers.bind(api),\n *     payments: async.retryable(3, api.getPayments.bind(api))\n * }, function(err, results) {\n *     // do something with the results\n * });\n *\n */\nfunction retry(opts, task, callback) {\n    var DEFAULT_TIMES = 5;\n    var DEFAULT_INTERVAL = 0;\n\n    var options = {\n        times: DEFAULT_TIMES,\n        intervalFunc: constant$1(DEFAULT_INTERVAL)\n    };\n\n    function parseTimes(acc, t) {\n        if (typeof t === 'object') {\n            acc.times = +t.times || DEFAULT_TIMES;\n\n            acc.intervalFunc = typeof t.interval === 'function' ?\n                t.interval :\n                constant$1(+t.interval || DEFAULT_INTERVAL);\n\n            acc.errorFilter = t.errorFilter;\n        } else if (typeof t === 'number' || typeof t === 'string') {\n            acc.times = +t || DEFAULT_TIMES;\n        } else {\n            throw new Error(\"Invalid arguments for async.retry\");\n        }\n    }\n\n    if (arguments.length < 3 && typeof opts === 'function') {\n        callback = task || noop;\n        task = opts;\n    } else {\n        parseTimes(options, opts);\n        callback = callback || noop;\n    }\n\n    if (typeof task !== 'function') {\n        throw new Error(\"Invalid arguments for async.retry\");\n    }\n\n    var _task = wrapAsync(task);\n\n    var attempt = 1;\n    function retryAttempt() {\n        _task(function(err) {\n            if (err && attempt++ < options.times &&\n                (typeof options.errorFilter != 'function' ||\n                    options.errorFilter(err))) {\n                setTimeout(retryAttempt, options.intervalFunc(attempt));\n            } else {\n                callback.apply(null, arguments);\n            }\n        });\n    }\n\n    retryAttempt();\n}\n\n/**\n * A close relative of [`retry`]{@link module:ControlFlow.retry}.  This method\n * wraps a task and makes it retryable, rather than immediately calling it\n * with retries.\n *\n * @name retryable\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.retry]{@link module:ControlFlow.retry}\n * @category Control Flow\n * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - optional\n * options, exactly the same as from `retry`\n * @param {AsyncFunction} task - the asynchronous function to wrap.\n * This function will be passed any arguments passed to the returned wrapper.\n * Invoked with (...args, callback).\n * @returns {AsyncFunction} The wrapped function, which when invoked, will\n * retry on an error, based on the parameters specified in `opts`.\n * This function will accept the same parameters as `task`.\n * @example\n *\n * async.auto({\n *     dep1: async.retryable(3, getFromFlakyService),\n *     process: [\"dep1\", async.retryable(3, function (results, cb) {\n *         maybeProcessData(results.dep1, cb);\n *     })]\n * }, callback);\n */\nvar retryable = function (opts, task) {\n    if (!task) {\n        task = opts;\n        opts = null;\n    }\n    var _task = wrapAsync(task);\n    return initialParams(function (args, callback) {\n        function taskFn(cb) {\n            _task.apply(null, args.concat(cb));\n        }\n\n        if (opts) retry(opts, taskFn, callback);\n        else retry(taskFn, callback);\n\n    });\n};\n\n/**\n * Run the functions in the `tasks` collection in series, each one running once\n * the previous function has completed. If any functions in the series pass an\n * error to its callback, no more functions are run, and `callback` is\n * immediately called with the value of the error. Otherwise, `callback`\n * receives an array of results when `tasks` have completed.\n *\n * It is also possible to use an object instead of an array. Each property will\n * be run as a function, and the results will be passed to the final `callback`\n * as an object instead of an array. This can be a more readable way of handling\n *  results from {@link async.series}.\n *\n * **Note** that while many implementations preserve the order of object\n * properties, the [ECMAScript Language Specification](http://www.ecma-international.org/ecma-262/5.1/#sec-8.6)\n * explicitly states that\n *\n * > The mechanics and order of enumerating the properties is not specified.\n *\n * So if you rely on the order in which your series of functions are executed,\n * and want this to work on all platforms, consider using an array.\n *\n * @name series\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Array|Iterable|Object} tasks - A collection containing\n * [async functions]{@link AsyncFunction} to run in series.\n * Each function can complete with any number of optional `result` values.\n * @param {Function} [callback] - An optional callback to run once all the\n * functions have completed. This function gets a results array (or object)\n * containing all the result arguments passed to the `task` callbacks. Invoked\n * with (err, result).\n * @example\n * async.series([\n *     function(callback) {\n *         // do some stuff ...\n *         callback(null, 'one');\n *     },\n *     function(callback) {\n *         // do some more stuff ...\n *         callback(null, 'two');\n *     }\n * ],\n * // optional callback\n * function(err, results) {\n *     // results is now equal to ['one', 'two']\n * });\n *\n * async.series({\n *     one: function(callback) {\n *         setTimeout(function() {\n *             callback(null, 1);\n *         }, 200);\n *     },\n *     two: function(callback){\n *         setTimeout(function() {\n *             callback(null, 2);\n *         }, 100);\n *     }\n * }, function(err, results) {\n *     // results is now equal to: {one: 1, two: 2}\n * });\n */\nfunction series(tasks, callback) {\n    _parallel(eachOfSeries, tasks, callback);\n}\n\n/**\n * Returns `true` if at least one element in the `coll` satisfies an async test.\n * If any iteratee call returns `true`, the main `callback` is immediately\n * called.\n *\n * @name some\n * @static\n * @memberOf module:Collections\n * @method\n * @alias any\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async truth test to apply to each item\n * in the collections in parallel.\n * The iteratee should complete with a boolean `result` value.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called as soon as any\n * iteratee returns `true`, or after all the iteratee functions have finished.\n * Result will be either `true` or `false` depending on the values of the async\n * tests. Invoked with (err, result).\n * @example\n *\n * async.some(['file1','file2','file3'], function(filePath, callback) {\n *     fs.access(filePath, function(err) {\n *         callback(null, !err)\n *     });\n * }, function(err, result) {\n *     // if result is true then at least one of the files exists\n * });\n */\nvar some = doParallel(_createTester(Boolean, identity));\n\n/**\n * The same as [`some`]{@link module:Collections.some} but runs a maximum of `limit` async operations at a time.\n *\n * @name someLimit\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.some]{@link module:Collections.some}\n * @alias anyLimit\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - An async truth test to apply to each item\n * in the collections in parallel.\n * The iteratee should complete with a boolean `result` value.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called as soon as any\n * iteratee returns `true`, or after all the iteratee functions have finished.\n * Result will be either `true` or `false` depending on the values of the async\n * tests. Invoked with (err, result).\n */\nvar someLimit = doParallelLimit(_createTester(Boolean, identity));\n\n/**\n * The same as [`some`]{@link module:Collections.some} but runs only a single async operation at a time.\n *\n * @name someSeries\n * @static\n * @memberOf module:Collections\n * @method\n * @see [async.some]{@link module:Collections.some}\n * @alias anySeries\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async truth test to apply to each item\n * in the collections in series.\n * The iteratee should complete with a boolean `result` value.\n * Invoked with (item, callback).\n * @param {Function} [callback] - A callback which is called as soon as any\n * iteratee returns `true`, or after all the iteratee functions have finished.\n * Result will be either `true` or `false` depending on the values of the async\n * tests. Invoked with (err, result).\n */\nvar someSeries = doLimit(someLimit, 1);\n\n/**\n * Sorts a list by the results of running each `coll` value through an async\n * `iteratee`.\n *\n * @name sortBy\n * @static\n * @memberOf module:Collections\n * @method\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {AsyncFunction} iteratee - An async function to apply to each item in\n * `coll`.\n * The iteratee should complete with a value to use as the sort criteria as\n * its `result`.\n * Invoked with (item, callback).\n * @param {Function} callback - A callback which is called after all the\n * `iteratee` functions have finished, or an error occurs. Results is the items\n * from the original `coll` sorted by the values returned by the `iteratee`\n * calls. Invoked with (err, results).\n * @example\n *\n * async.sortBy(['file1','file2','file3'], function(file, callback) {\n *     fs.stat(file, function(err, stats) {\n *         callback(err, stats.mtime);\n *     });\n * }, function(err, results) {\n *     // results is now the original array of files sorted by\n *     // modified date\n * });\n *\n * // By modifying the callback parameter the\n * // sorting order can be influenced:\n *\n * // ascending order\n * async.sortBy([1,9,3,5], function(x, callback) {\n *     callback(null, x);\n * }, function(err,result) {\n *     // result callback\n * });\n *\n * // descending order\n * async.sortBy([1,9,3,5], function(x, callback) {\n *     callback(null, x*-1);    //<- x*-1 instead of x, turns the order around\n * }, function(err,result) {\n *     // result callback\n * });\n */\nfunction sortBy (coll, iteratee, callback) {\n    var _iteratee = wrapAsync(iteratee);\n    map(coll, function (x, callback) {\n        _iteratee(x, function (err, criteria) {\n            if (err) return callback(err);\n            callback(null, {value: x, criteria: criteria});\n        });\n    }, function (err, results) {\n        if (err) return callback(err);\n        callback(null, arrayMap(results.sort(comparator), baseProperty('value')));\n    });\n\n    function comparator(left, right) {\n        var a = left.criteria, b = right.criteria;\n        return a < b ? -1 : a > b ? 1 : 0;\n    }\n}\n\n/**\n * Sets a time limit on an asynchronous function. If the function does not call\n * its callback within the specified milliseconds, it will be called with a\n * timeout error. The code property for the error object will be `'ETIMEDOUT'`.\n *\n * @name timeout\n * @static\n * @memberOf module:Utils\n * @method\n * @category Util\n * @param {AsyncFunction} asyncFn - The async function to limit in time.\n * @param {number} milliseconds - The specified time limit.\n * @param {*} [info] - Any variable you want attached (`string`, `object`, etc)\n * to timeout Error for more information..\n * @returns {AsyncFunction} Returns a wrapped function that can be used with any\n * of the control flow functions.\n * Invoke this function with the same parameters as you would `asyncFunc`.\n * @example\n *\n * function myFunction(foo, callback) {\n *     doAsyncTask(foo, function(err, data) {\n *         // handle errors\n *         if (err) return callback(err);\n *\n *         // do some stuff ...\n *\n *         // return processed data\n *         return callback(null, data);\n *     });\n * }\n *\n * var wrapped = async.timeout(myFunction, 1000);\n *\n * // call `wrapped` as you would `myFunction`\n * wrapped({ bar: 'bar' }, function(err, data) {\n *     // if `myFunction` takes < 1000 ms to execute, `err`\n *     // and `data` will have their expected values\n *\n *     // else `err` will be an Error with the code 'ETIMEDOUT'\n * });\n */\nfunction timeout(asyncFn, milliseconds, info) {\n    var fn = wrapAsync(asyncFn);\n\n    return initialParams(function (args, callback) {\n        var timedOut = false;\n        var timer;\n\n        function timeoutCallback() {\n            var name = asyncFn.name || 'anonymous';\n            var error  = new Error('Callback function \"' + name + '\" timed out.');\n            error.code = 'ETIMEDOUT';\n            if (info) {\n                error.info = info;\n            }\n            timedOut = true;\n            callback(error);\n        }\n\n        args.push(function () {\n            if (!timedOut) {\n                callback.apply(null, arguments);\n                clearTimeout(timer);\n            }\n        });\n\n        // setup timer and call original function\n        timer = setTimeout(timeoutCallback, milliseconds);\n        fn.apply(null, args);\n    });\n}\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeCeil = Math.ceil;\nvar nativeMax = Math.max;\n\n/**\n * The base implementation of `_.range` and `_.rangeRight` which doesn't\n * coerce arguments.\n *\n * @private\n * @param {number} start The start of the range.\n * @param {number} end The end of the range.\n * @param {number} step The value to increment or decrement by.\n * @param {boolean} [fromRight] Specify iterating from right to left.\n * @returns {Array} Returns the range of numbers.\n */\nfunction baseRange(start, end, step, fromRight) {\n  var index = -1,\n      length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),\n      result = Array(length);\n\n  while (length--) {\n    result[fromRight ? length : ++index] = start;\n    start += step;\n  }\n  return result;\n}\n\n/**\n * The same as [times]{@link module:ControlFlow.times} but runs a maximum of `limit` async operations at a\n * time.\n *\n * @name timesLimit\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.times]{@link module:ControlFlow.times}\n * @category Control Flow\n * @param {number} count - The number of times to run the function.\n * @param {number} limit - The maximum number of async operations at a time.\n * @param {AsyncFunction} iteratee - The async function to call `n` times.\n * Invoked with the iteration index and a callback: (n, next).\n * @param {Function} callback - see [async.map]{@link module:Collections.map}.\n */\nfunction timeLimit(count, limit, iteratee, callback) {\n    var _iteratee = wrapAsync(iteratee);\n    mapLimit(baseRange(0, count, 1), limit, _iteratee, callback);\n}\n\n/**\n * Calls the `iteratee` function `n` times, and accumulates results in the same\n * manner you would use with [map]{@link module:Collections.map}.\n *\n * @name times\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.map]{@link module:Collections.map}\n * @category Control Flow\n * @param {number} n - The number of times to run the function.\n * @param {AsyncFunction} iteratee - The async function to call `n` times.\n * Invoked with the iteration index and a callback: (n, next).\n * @param {Function} callback - see {@link module:Collections.map}.\n * @example\n *\n * // Pretend this is some complicated async factory\n * var createUser = function(id, callback) {\n *     callback(null, {\n *         id: 'user' + id\n *     });\n * };\n *\n * // generate 5 users\n * async.times(5, function(n, next) {\n *     createUser(n, function(err, user) {\n *         next(err, user);\n *     });\n * }, function(err, users) {\n *     // we should now have 5 users\n * });\n */\nvar times = doLimit(timeLimit, Infinity);\n\n/**\n * The same as [times]{@link module:ControlFlow.times} but runs only a single async operation at a time.\n *\n * @name timesSeries\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.times]{@link module:ControlFlow.times}\n * @category Control Flow\n * @param {number} n - The number of times to run the function.\n * @param {AsyncFunction} iteratee - The async function to call `n` times.\n * Invoked with the iteration index and a callback: (n, next).\n * @param {Function} callback - see {@link module:Collections.map}.\n */\nvar timesSeries = doLimit(timeLimit, 1);\n\n/**\n * A relative of `reduce`.  Takes an Object or Array, and iterates over each\n * element in series, each step potentially mutating an `accumulator` value.\n * The type of the accumulator defaults to the type of collection passed in.\n *\n * @name transform\n * @static\n * @memberOf module:Collections\n * @method\n * @category Collection\n * @param {Array|Iterable|Object} coll - A collection to iterate over.\n * @param {*} [accumulator] - The initial state of the transform.  If omitted,\n * it will default to an empty Object or Array, depending on the type of `coll`\n * @param {AsyncFunction} iteratee - A function applied to each item in the\n * collection that potentially modifies the accumulator.\n * Invoked with (accumulator, item, key, callback).\n * @param {Function} [callback] - A callback which is called after all the\n * `iteratee` functions have finished. Result is the transformed accumulator.\n * Invoked with (err, result).\n * @example\n *\n * async.transform([1,2,3], function(acc, item, index, callback) {\n *     // pointless async:\n *     process.nextTick(function() {\n *         acc.push(item * 2)\n *         callback(null)\n *     });\n * }, function(err, result) {\n *     // result is now equal to [2, 4, 6]\n * });\n *\n * @example\n *\n * async.transform({a: 1, b: 2, c: 3}, function (obj, val, key, callback) {\n *     setImmediate(function () {\n *         obj[key] = val * 2;\n *         callback();\n *     })\n * }, function (err, result) {\n *     // result is equal to {a: 2, b: 4, c: 6}\n * })\n */\nfunction transform (coll, accumulator, iteratee, callback) {\n    if (arguments.length <= 3) {\n        callback = iteratee;\n        iteratee = accumulator;\n        accumulator = isArray(coll) ? [] : {};\n    }\n    callback = once(callback || noop);\n    var _iteratee = wrapAsync(iteratee);\n\n    eachOf(coll, function(v, k, cb) {\n        _iteratee(accumulator, v, k, cb);\n    }, function(err) {\n        callback(err, accumulator);\n    });\n}\n\n/**\n * It runs each task in series but stops whenever any of the functions were\n * successful. If one of the tasks were successful, the `callback` will be\n * passed the result of the successful task. If all tasks fail, the callback\n * will be passed the error and result (if any) of the final attempt.\n *\n * @name tryEach\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Array|Iterable|Object} tasks - A collection containing functions to\n * run, each function is passed a `callback(err, result)` it must call on\n * completion with an error `err` (which can be `null`) and an optional `result`\n * value.\n * @param {Function} [callback] - An optional callback which is called when one\n * of the tasks has succeeded, or all have failed. It receives the `err` and\n * `result` arguments of the last attempt at completing the `task`. Invoked with\n * (err, results).\n * @example\n * async.tryEach([\n *     function getDataFromFirstWebsite(callback) {\n *         // Try getting the data from the first website\n *         callback(err, data);\n *     },\n *     function getDataFromSecondWebsite(callback) {\n *         // First website failed,\n *         // Try getting the data from the backup website\n *         callback(err, data);\n *     }\n * ],\n * // optional callback\n * function(err, results) {\n *     Now do something with the data.\n * });\n *\n */\nfunction tryEach(tasks, callback) {\n    var error = null;\n    var result;\n    callback = callback || noop;\n    eachSeries(tasks, function(task, callback) {\n        wrapAsync(task)(function (err, res/*, ...args*/) {\n            if (arguments.length > 2) {\n                result = slice(arguments, 1);\n            } else {\n                result = res;\n            }\n            error = err;\n            callback(!err);\n        });\n    }, function () {\n        callback(error, result);\n    });\n}\n\n/**\n * Undoes a [memoize]{@link module:Utils.memoize}d function, reverting it to the original,\n * unmemoized form. Handy for testing.\n *\n * @name unmemoize\n * @static\n * @memberOf module:Utils\n * @method\n * @see [async.memoize]{@link module:Utils.memoize}\n * @category Util\n * @param {AsyncFunction} fn - the memoized function\n * @returns {AsyncFunction} a function that calls the original unmemoized function\n */\nfunction unmemoize(fn) {\n    return function () {\n        return (fn.unmemoized || fn).apply(null, arguments);\n    };\n}\n\n/**\n * Repeatedly call `iteratee`, while `test` returns `true`. Calls `callback` when\n * stopped, or an error occurs.\n *\n * @name whilst\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Function} test - synchronous truth test to perform before each\n * execution of `iteratee`. Invoked with ().\n * @param {AsyncFunction} iteratee - An async function which is called each time\n * `test` passes. Invoked with (callback).\n * @param {Function} [callback] - A callback which is called after the test\n * function has failed and repeated execution of `iteratee` has stopped. `callback`\n * will be passed an error and any arguments passed to the final `iteratee`'s\n * callback. Invoked with (err, [results]);\n * @returns undefined\n * @example\n *\n * var count = 0;\n * async.whilst(\n *     function() { return count < 5; },\n *     function(callback) {\n *         count++;\n *         setTimeout(function() {\n *             callback(null, count);\n *         }, 1000);\n *     },\n *     function (err, n) {\n *         // 5 seconds have passed, n = 5\n *     }\n * );\n */\nfunction whilst(test, iteratee, callback) {\n    callback = onlyOnce(callback || noop);\n    var _iteratee = wrapAsync(iteratee);\n    if (!test()) return callback(null);\n    var next = function(err/*, ...args*/) {\n        if (err) return callback(err);\n        if (test()) return _iteratee(next);\n        var args = slice(arguments, 1);\n        callback.apply(null, [null].concat(args));\n    };\n    _iteratee(next);\n}\n\n/**\n * Repeatedly call `iteratee` until `test` returns `true`. Calls `callback` when\n * stopped, or an error occurs. `callback` will be passed an error and any\n * arguments passed to the final `iteratee`'s callback.\n *\n * The inverse of [whilst]{@link module:ControlFlow.whilst}.\n *\n * @name until\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @see [async.whilst]{@link module:ControlFlow.whilst}\n * @category Control Flow\n * @param {Function} test - synchronous truth test to perform before each\n * execution of `iteratee`. Invoked with ().\n * @param {AsyncFunction} iteratee - An async function which is called each time\n * `test` fails. Invoked with (callback).\n * @param {Function} [callback] - A callback which is called after the test\n * function has passed and repeated execution of `iteratee` has stopped. `callback`\n * will be passed an error and any arguments passed to the final `iteratee`'s\n * callback. Invoked with (err, [results]);\n */\nfunction until(test, iteratee, callback) {\n    whilst(function() {\n        return !test.apply(this, arguments);\n    }, iteratee, callback);\n}\n\n/**\n * Runs the `tasks` array of functions in series, each passing their results to\n * the next in the array. However, if any of the `tasks` pass an error to their\n * own callback, the next function is not executed, and the main `callback` is\n * immediately called with the error.\n *\n * @name waterfall\n * @static\n * @memberOf module:ControlFlow\n * @method\n * @category Control Flow\n * @param {Array} tasks - An array of [async functions]{@link AsyncFunction}\n * to run.\n * Each function should complete with any number of `result` values.\n * The `result` values will be passed as arguments, in order, to the next task.\n * @param {Function} [callback] - An optional callback to run once all the\n * functions have completed. This will be passed the results of the last task's\n * callback. Invoked with (err, [results]).\n * @returns undefined\n * @example\n *\n * async.waterfall([\n *     function(callback) {\n *         callback(null, 'one', 'two');\n *     },\n *     function(arg1, arg2, callback) {\n *         // arg1 now equals 'one' and arg2 now equals 'two'\n *         callback(null, 'three');\n *     },\n *     function(arg1, callback) {\n *         // arg1 now equals 'three'\n *         callback(null, 'done');\n *     }\n * ], function (err, result) {\n *     // result now equals 'done'\n * });\n *\n * // Or, with named functions:\n * async.waterfall([\n *     myFirstFunction,\n *     mySecondFunction,\n *     myLastFunction,\n * ], function (err, result) {\n *     // result now equals 'done'\n * });\n * function myFirstFunction(callback) {\n *     callback(null, 'one', 'two');\n * }\n * function mySecondFunction(arg1, arg2, callback) {\n *     // arg1 now equals 'one' and arg2 now equals 'two'\n *     callback(null, 'three');\n * }\n * function myLastFunction(arg1, callback) {\n *     // arg1 now equals 'three'\n *     callback(null, 'done');\n * }\n */\nvar waterfall = function(tasks, callback) {\n    callback = once(callback || noop);\n    if (!isArray(tasks)) return callback(new Error('First argument to waterfall must be an array of functions'));\n    if (!tasks.length) return callback();\n    var taskIndex = 0;\n\n    function nextTask(args) {\n        var task = wrapAsync(tasks[taskIndex++]);\n        args.push(onlyOnce(next));\n        task.apply(null, args);\n    }\n\n    function next(err/*, ...args*/) {\n        if (err || taskIndex === tasks.length) {\n            return callback.apply(null, arguments);\n        }\n        nextTask(slice(arguments, 1));\n    }\n\n    nextTask([]);\n};\n\n/**\n * An \"async function\" in the context of Async is an asynchronous function with\n * a variable number of parameters, with the final parameter being a callback.\n * (`function (arg1, arg2, ..., callback) {}`)\n * The final callback is of the form `callback(err, results...)`, which must be\n * called once the function is completed.  The callback should be called with a\n * Error as its first argument to signal that an error occurred.\n * Otherwise, if no error occurred, it should be called with `null` as the first\n * argument, and any additional `result` arguments that may apply, to signal\n * successful completion.\n * The callback must be called exactly once, ideally on a later tick of the\n * JavaScript event loop.\n *\n * This type of function is also referred to as a \"Node-style async function\",\n * or a \"continuation passing-style function\" (CPS). Most of the methods of this\n * library are themselves CPS/Node-style async functions, or functions that\n * return CPS/Node-style async functions.\n *\n * Wherever we accept a Node-style async function, we also directly accept an\n * [ES2017 `async` function]{@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function}.\n * In this case, the `async` function will not be passed a final callback\n * argument, and any thrown error will be used as the `err` argument of the\n * implicit callback, and the return value will be used as the `result` value.\n * (i.e. a `rejected` of the returned Promise becomes the `err` callback\n * argument, and a `resolved` value becomes the `result`.)\n *\n * Note, due to JavaScript limitations, we can only detect native `async`\n * functions and not transpilied implementations.\n * Your environment must have `async`/`await` support for this to work.\n * (e.g. Node > v7.6, or a recent version of a modern browser).\n * If you are using `async` functions through a transpiler (e.g. Babel), you\n * must still wrap the function with [asyncify]{@link module:Utils.asyncify},\n * because the `async function` will be compiled to an ordinary function that\n * returns a promise.\n *\n * @typedef {Function} AsyncFunction\n * @static\n */\n\n/**\n * Async is a utility module which provides straight-forward, powerful functions\n * for working with asynchronous JavaScript. Although originally designed for\n * use with [Node.js](http://nodejs.org) and installable via\n * `npm install --save async`, it can also be used directly in the browser.\n * @module async\n * @see AsyncFunction\n */\n\n\n/**\n * A collection of `async` functions for manipulating collections, such as\n * arrays and objects.\n * @module Collections\n */\n\n/**\n * A collection of `async` functions for controlling the flow through a script.\n * @module ControlFlow\n */\n\n/**\n * A collection of `async` utility functions.\n * @module Utils\n */\n\nvar index = {\n    apply: apply,\n    applyEach: applyEach,\n    applyEachSeries: applyEachSeries,\n    asyncify: asyncify,\n    auto: auto,\n    autoInject: autoInject,\n    cargo: cargo,\n    compose: compose,\n    concat: concat,\n    concatLimit: concatLimit,\n    concatSeries: concatSeries,\n    constant: constant,\n    detect: detect,\n    detectLimit: detectLimit,\n    detectSeries: detectSeries,\n    dir: dir,\n    doDuring: doDuring,\n    doUntil: doUntil,\n    doWhilst: doWhilst,\n    during: during,\n    each: eachLimit,\n    eachLimit: eachLimit$1,\n    eachOf: eachOf,\n    eachOfLimit: eachOfLimit,\n    eachOfSeries: eachOfSeries,\n    eachSeries: eachSeries,\n    ensureAsync: ensureAsync,\n    every: every,\n    everyLimit: everyLimit,\n    everySeries: everySeries,\n    filter: filter,\n    filterLimit: filterLimit,\n    filterSeries: filterSeries,\n    forever: forever,\n    groupBy: groupBy,\n    groupByLimit: groupByLimit,\n    groupBySeries: groupBySeries,\n    log: log,\n    map: map,\n    mapLimit: mapLimit,\n    mapSeries: mapSeries,\n    mapValues: mapValues,\n    mapValuesLimit: mapValuesLimit,\n    mapValuesSeries: mapValuesSeries,\n    memoize: memoize,\n    nextTick: nextTick,\n    parallel: parallelLimit,\n    parallelLimit: parallelLimit$1,\n    priorityQueue: priorityQueue,\n    queue: queue$1,\n    race: race,\n    reduce: reduce,\n    reduceRight: reduceRight,\n    reflect: reflect,\n    reflectAll: reflectAll,\n    reject: reject,\n    rejectLimit: rejectLimit,\n    rejectSeries: rejectSeries,\n    retry: retry,\n    retryable: retryable,\n    seq: seq,\n    series: series,\n    setImmediate: setImmediate$1,\n    some: some,\n    someLimit: someLimit,\n    someSeries: someSeries,\n    sortBy: sortBy,\n    timeout: timeout,\n    times: times,\n    timesLimit: timeLimit,\n    timesSeries: timesSeries,\n    transform: transform,\n    tryEach: tryEach,\n    unmemoize: unmemoize,\n    until: until,\n    waterfall: waterfall,\n    whilst: whilst,\n\n    // aliases\n    all: every,\n    allLimit: everyLimit,\n    allSeries: everySeries,\n    any: some,\n    anyLimit: someLimit,\n    anySeries: someSeries,\n    find: detect,\n    findLimit: detectLimit,\n    findSeries: detectSeries,\n    forEach: eachLimit,\n    forEachSeries: eachSeries,\n    forEachLimit: eachLimit$1,\n    forEachOf: eachOf,\n    forEachOfSeries: eachOfSeries,\n    forEachOfLimit: eachOfLimit,\n    inject: reduce,\n    foldl: reduce,\n    foldr: reduceRight,\n    select: filter,\n    selectLimit: filterLimit,\n    selectSeries: filterSeries,\n    wrapSync: asyncify\n};\n\nexports['default'] = index;\nexports.apply = apply;\nexports.applyEach = applyEach;\nexports.applyEachSeries = applyEachSeries;\nexports.asyncify = asyncify;\nexports.auto = auto;\nexports.autoInject = autoInject;\nexports.cargo = cargo;\nexports.compose = compose;\nexports.concat = concat;\nexports.concatLimit = concatLimit;\nexports.concatSeries = concatSeries;\nexports.constant = constant;\nexports.detect = detect;\nexports.detectLimit = detectLimit;\nexports.detectSeries = detectSeries;\nexports.dir = dir;\nexports.doDuring = doDuring;\nexports.doUntil = doUntil;\nexports.doWhilst = doWhilst;\nexports.during = during;\nexports.each = eachLimit;\nexports.eachLimit = eachLimit$1;\nexports.eachOf = eachOf;\nexports.eachOfLimit = eachOfLimit;\nexports.eachOfSeries = eachOfSeries;\nexports.eachSeries = eachSeries;\nexports.ensureAsync = ensureAsync;\nexports.every = every;\nexports.everyLimit = everyLimit;\nexports.everySeries = everySeries;\nexports.filter = filter;\nexports.filterLimit = filterLimit;\nexports.filterSeries = filterSeries;\nexports.forever = forever;\nexports.groupBy = groupBy;\nexports.groupByLimit = groupByLimit;\nexports.groupBySeries = groupBySeries;\nexports.log = log;\nexports.map = map;\nexports.mapLimit = mapLimit;\nexports.mapSeries = mapSeries;\nexports.mapValues = mapValues;\nexports.mapValuesLimit = mapValuesLimit;\nexports.mapValuesSeries = mapValuesSeries;\nexports.memoize = memoize;\nexports.nextTick = nextTick;\nexports.parallel = parallelLimit;\nexports.parallelLimit = parallelLimit$1;\nexports.priorityQueue = priorityQueue;\nexports.queue = queue$1;\nexports.race = race;\nexports.reduce = reduce;\nexports.reduceRight = reduceRight;\nexports.reflect = reflect;\nexports.reflectAll = reflectAll;\nexports.reject = reject;\nexports.rejectLimit = rejectLimit;\nexports.rejectSeries = rejectSeries;\nexports.retry = retry;\nexports.retryable = retryable;\nexports.seq = seq;\nexports.series = series;\nexports.setImmediate = setImmediate$1;\nexports.some = some;\nexports.someLimit = someLimit;\nexports.someSeries = someSeries;\nexports.sortBy = sortBy;\nexports.timeout = timeout;\nexports.times = times;\nexports.timesLimit = timeLimit;\nexports.timesSeries = timesSeries;\nexports.transform = transform;\nexports.tryEach = tryEach;\nexports.unmemoize = unmemoize;\nexports.until = until;\nexports.waterfall = waterfall;\nexports.whilst = whilst;\nexports.all = every;\nexports.allLimit = everyLimit;\nexports.allSeries = everySeries;\nexports.any = some;\nexports.anyLimit = someLimit;\nexports.anySeries = someSeries;\nexports.find = detect;\nexports.findLimit = detectLimit;\nexports.findSeries = detectSeries;\nexports.forEach = eachLimit;\nexports.forEachSeries = eachSeries;\nexports.forEachLimit = eachLimit$1;\nexports.forEachOf = eachOf;\nexports.forEachOfSeries = eachOfSeries;\nexports.forEachOfLimit = eachOfLimit;\nexports.inject = reduce;\nexports.foldl = reduce;\nexports.foldr = reduceRight;\nexports.select = filter;\nexports.selectLimit = filterLimit;\nexports.selectSeries = filterSeries;\nexports.wrapSync = asyncify;\n\nObject.defineProperty(exports, '__esModule', { value: true });\n\n})));\n","/*! https://mths.be/punycode v1.4.1 by @mathias */\n;(function(root) {\n\n\t/** Detect free variables */\n\tvar freeExports = typeof exports == 'object' && exports &&\n\t\t!exports.nodeType && exports;\n\tvar freeModule = typeof module == 'object' && module &&\n\t\t!module.nodeType && module;\n\tvar freeGlobal = typeof global == 'object' && global;\n\tif (\n\t\tfreeGlobal.global === freeGlobal ||\n\t\tfreeGlobal.window === freeGlobal ||\n\t\tfreeGlobal.self === freeGlobal\n\t) {\n\t\troot = freeGlobal;\n\t}\n\n\t/**\n\t * The `punycode` object.\n\t * @name punycode\n\t * @type Object\n\t */\n\tvar punycode,\n\n\t/** Highest positive signed 32-bit float value */\n\tmaxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1\n\n\t/** Bootstring parameters */\n\tbase = 36,\n\ttMin = 1,\n\ttMax = 26,\n\tskew = 38,\n\tdamp = 700,\n\tinitialBias = 72,\n\tinitialN = 128, // 0x80\n\tdelimiter = '-', // '\\x2D'\n\n\t/** Regular expressions */\n\tregexPunycode = /^xn--/,\n\tregexNonASCII = /[^\\x20-\\x7E]/, // unprintable ASCII chars + non-ASCII chars\n\tregexSeparators = /[\\x2E\\u3002\\uFF0E\\uFF61]/g, // RFC 3490 separators\n\n\t/** Error messages */\n\terrors = {\n\t\t'overflow': 'Overflow: input needs wider integers to process',\n\t\t'not-basic': 'Illegal input >= 0x80 (not a basic code point)',\n\t\t'invalid-input': 'Invalid input'\n\t},\n\n\t/** Convenience shortcuts */\n\tbaseMinusTMin = base - tMin,\n\tfloor = Math.floor,\n\tstringFromCharCode = String.fromCharCode,\n\n\t/** Temporary variable */\n\tkey;\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/**\n\t * A generic error utility function.\n\t * @private\n\t * @param {String} type The error type.\n\t * @returns {Error} Throws a `RangeError` with the applicable error message.\n\t */\n\tfunction error(type) {\n\t\tthrow new RangeError(errors[type]);\n\t}\n\n\t/**\n\t * A generic `Array#map` utility function.\n\t * @private\n\t * @param {Array} array The array to iterate over.\n\t * @param {Function} callback The function that gets called for every array\n\t * item.\n\t * @returns {Array} A new array of values returned by the callback function.\n\t */\n\tfunction map(array, fn) {\n\t\tvar length = array.length;\n\t\tvar result = [];\n\t\twhile (length--) {\n\t\t\tresult[length] = fn(array[length]);\n\t\t}\n\t\treturn result;\n\t}\n\n\t/**\n\t * A simple `Array#map`-like wrapper to work with domain name strings or email\n\t * addresses.\n\t * @private\n\t * @param {String} domain The domain name or email address.\n\t * @param {Function} callback The function that gets called for every\n\t * character.\n\t * @returns {Array} A new string of characters returned by the callback\n\t * function.\n\t */\n\tfunction mapDomain(string, fn) {\n\t\tvar parts = string.split('@');\n\t\tvar result = '';\n\t\tif (parts.length > 1) {\n\t\t\t// In email addresses, only the domain name should be punycoded. Leave\n\t\t\t// the local part (i.e. everything up to `@`) intact.\n\t\t\tresult = parts[0] + '@';\n\t\t\tstring = parts[1];\n\t\t}\n\t\t// Avoid `split(regex)` for IE8 compatibility. See #17.\n\t\tstring = string.replace(regexSeparators, '\\x2E');\n\t\tvar labels = string.split('.');\n\t\tvar encoded = map(labels, fn).join('.');\n\t\treturn result + encoded;\n\t}\n\n\t/**\n\t * Creates an array containing the numeric code points of each Unicode\n\t * character in the string. While JavaScript uses UCS-2 internally,\n\t * this function will convert a pair of surrogate halves (each of which\n\t * UCS-2 exposes as separate characters) into a single code point,\n\t * matching UTF-16.\n\t * @see `punycode.ucs2.encode`\n\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t * @memberOf punycode.ucs2\n\t * @name decode\n\t * @param {String} string The Unicode input string (UCS-2).\n\t * @returns {Array} The new array of code points.\n\t */\n\tfunction ucs2decode(string) {\n\t\tvar output = [],\n\t\t    counter = 0,\n\t\t    length = string.length,\n\t\t    value,\n\t\t    extra;\n\t\twhile (counter < length) {\n\t\t\tvalue = string.charCodeAt(counter++);\n\t\t\tif (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n\t\t\t\t// high surrogate, and there is a next character\n\t\t\t\textra = string.charCodeAt(counter++);\n\t\t\t\tif ((extra & 0xFC00) == 0xDC00) { // low surrogate\n\t\t\t\t\toutput.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n\t\t\t\t} else {\n\t\t\t\t\t// unmatched surrogate; only append this code unit, in case the next\n\t\t\t\t\t// code unit is the high surrogate of a surrogate pair\n\t\t\t\t\toutput.push(value);\n\t\t\t\t\tcounter--;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\toutput.push(value);\n\t\t\t}\n\t\t}\n\t\treturn output;\n\t}\n\n\t/**\n\t * Creates a string based on an array of numeric code points.\n\t * @see `punycode.ucs2.decode`\n\t * @memberOf punycode.ucs2\n\t * @name encode\n\t * @param {Array} codePoints The array of numeric code points.\n\t * @returns {String} The new Unicode string (UCS-2).\n\t */\n\tfunction ucs2encode(array) {\n\t\treturn map(array, function(value) {\n\t\t\tvar output = '';\n\t\t\tif (value > 0xFFFF) {\n\t\t\t\tvalue -= 0x10000;\n\t\t\t\toutput += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);\n\t\t\t\tvalue = 0xDC00 | value & 0x3FF;\n\t\t\t}\n\t\t\toutput += stringFromCharCode(value);\n\t\t\treturn output;\n\t\t}).join('');\n\t}\n\n\t/**\n\t * Converts a basic code point into a digit/integer.\n\t * @see `digitToBasic()`\n\t * @private\n\t * @param {Number} codePoint The basic numeric code point value.\n\t * @returns {Number} The numeric value of a basic code point (for use in\n\t * representing integers) in the range `0` to `base - 1`, or `base` if\n\t * the code point does not represent a value.\n\t */\n\tfunction basicToDigit(codePoint) {\n\t\tif (codePoint - 48 < 10) {\n\t\t\treturn codePoint - 22;\n\t\t}\n\t\tif (codePoint - 65 < 26) {\n\t\t\treturn codePoint - 65;\n\t\t}\n\t\tif (codePoint - 97 < 26) {\n\t\t\treturn codePoint - 97;\n\t\t}\n\t\treturn base;\n\t}\n\n\t/**\n\t * Converts a digit/integer into a basic code point.\n\t * @see `basicToDigit()`\n\t * @private\n\t * @param {Number} digit The numeric value of a basic code point.\n\t * @returns {Number} The basic code point whose value (when used for\n\t * representing integers) is `digit`, which needs to be in the range\n\t * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is\n\t * used; else, the lowercase form is used. The behavior is undefined\n\t * if `flag` is non-zero and `digit` has no uppercase form.\n\t */\n\tfunction digitToBasic(digit, flag) {\n\t\t//  0..25 map to ASCII a..z or A..Z\n\t\t// 26..35 map to ASCII 0..9\n\t\treturn digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);\n\t}\n\n\t/**\n\t * Bias adaptation function as per section 3.4 of RFC 3492.\n\t * https://tools.ietf.org/html/rfc3492#section-3.4\n\t * @private\n\t */\n\tfunction adapt(delta, numPoints, firstTime) {\n\t\tvar k = 0;\n\t\tdelta = firstTime ? floor(delta / damp) : delta >> 1;\n\t\tdelta += floor(delta / numPoints);\n\t\tfor (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {\n\t\t\tdelta = floor(delta / baseMinusTMin);\n\t\t}\n\t\treturn floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n\t}\n\n\t/**\n\t * Converts a Punycode string of ASCII-only symbols to a string of Unicode\n\t * symbols.\n\t * @memberOf punycode\n\t * @param {String} input The Punycode string of ASCII-only symbols.\n\t * @returns {String} The resulting string of Unicode symbols.\n\t */\n\tfunction decode(input) {\n\t\t// Don't use UCS-2\n\t\tvar output = [],\n\t\t    inputLength = input.length,\n\t\t    out,\n\t\t    i = 0,\n\t\t    n = initialN,\n\t\t    bias = initialBias,\n\t\t    basic,\n\t\t    j,\n\t\t    index,\n\t\t    oldi,\n\t\t    w,\n\t\t    k,\n\t\t    digit,\n\t\t    t,\n\t\t    /** Cached calculation results */\n\t\t    baseMinusT;\n\n\t\t// Handle the basic code points: let `basic` be the number of input code\n\t\t// points before the last delimiter, or `0` if there is none, then copy\n\t\t// the first basic code points to the output.\n\n\t\tbasic = input.lastIndexOf(delimiter);\n\t\tif (basic < 0) {\n\t\t\tbasic = 0;\n\t\t}\n\n\t\tfor (j = 0; j < basic; ++j) {\n\t\t\t// if it's not a basic code point\n\t\t\tif (input.charCodeAt(j) >= 0x80) {\n\t\t\t\terror('not-basic');\n\t\t\t}\n\t\t\toutput.push(input.charCodeAt(j));\n\t\t}\n\n\t\t// Main decoding loop: start just after the last delimiter if any basic code\n\t\t// points were copied; start at the beginning otherwise.\n\n\t\tfor (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {\n\n\t\t\t// `index` is the index of the next character to be consumed.\n\t\t\t// Decode a generalized variable-length integer into `delta`,\n\t\t\t// which gets added to `i`. The overflow checking is easier\n\t\t\t// if we increase `i` as we go, then subtract off its starting\n\t\t\t// value at the end to obtain `delta`.\n\t\t\tfor (oldi = i, w = 1, k = base; /* no condition */; k += base) {\n\n\t\t\t\tif (index >= inputLength) {\n\t\t\t\t\terror('invalid-input');\n\t\t\t\t}\n\n\t\t\t\tdigit = basicToDigit(input.charCodeAt(index++));\n\n\t\t\t\tif (digit >= base || digit > floor((maxInt - i) / w)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\ti += digit * w;\n\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\n\t\t\t\tif (digit < t) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tbaseMinusT = base - t;\n\t\t\t\tif (w > floor(maxInt / baseMinusT)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tw *= baseMinusT;\n\n\t\t\t}\n\n\t\t\tout = output.length + 1;\n\t\t\tbias = adapt(i - oldi, out, oldi == 0);\n\n\t\t\t// `i` was supposed to wrap around from `out` to `0`,\n\t\t\t// incrementing `n` each time, so we'll fix that now:\n\t\t\tif (floor(i / out) > maxInt - n) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tn += floor(i / out);\n\t\t\ti %= out;\n\n\t\t\t// Insert `n` at position `i` of the output\n\t\t\toutput.splice(i++, 0, n);\n\n\t\t}\n\n\t\treturn ucs2encode(output);\n\t}\n\n\t/**\n\t * Converts a string of Unicode symbols (e.g. a domain name label) to a\n\t * Punycode string of ASCII-only symbols.\n\t * @memberOf punycode\n\t * @param {String} input The string of Unicode symbols.\n\t * @returns {String} The resulting Punycode string of ASCII-only symbols.\n\t */\n\tfunction encode(input) {\n\t\tvar n,\n\t\t    delta,\n\t\t    handledCPCount,\n\t\t    basicLength,\n\t\t    bias,\n\t\t    j,\n\t\t    m,\n\t\t    q,\n\t\t    k,\n\t\t    t,\n\t\t    currentValue,\n\t\t    output = [],\n\t\t    /** `inputLength` will hold the number of code points in `input`. */\n\t\t    inputLength,\n\t\t    /** Cached calculation results */\n\t\t    handledCPCountPlusOne,\n\t\t    baseMinusT,\n\t\t    qMinusT;\n\n\t\t// Convert the input in UCS-2 to Unicode\n\t\tinput = ucs2decode(input);\n\n\t\t// Cache the length\n\t\tinputLength = input.length;\n\n\t\t// Initialize the state\n\t\tn = initialN;\n\t\tdelta = 0;\n\t\tbias = initialBias;\n\n\t\t// Handle the basic code points\n\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\tcurrentValue = input[j];\n\t\t\tif (currentValue < 0x80) {\n\t\t\t\toutput.push(stringFromCharCode(currentValue));\n\t\t\t}\n\t\t}\n\n\t\thandledCPCount = basicLength = output.length;\n\n\t\t// `handledCPCount` is the number of code points that have been handled;\n\t\t// `basicLength` is the number of basic code points.\n\n\t\t// Finish the basic string - if it is not empty - with a delimiter\n\t\tif (basicLength) {\n\t\t\toutput.push(delimiter);\n\t\t}\n\n\t\t// Main encoding loop:\n\t\twhile (handledCPCount < inputLength) {\n\n\t\t\t// All non-basic code points < n have been handled already. Find the next\n\t\t\t// larger one:\n\t\t\tfor (m = maxInt, j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\t\t\t\tif (currentValue >= n && currentValue < m) {\n\t\t\t\t\tm = currentValue;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,\n\t\t\t// but guard against overflow\n\t\t\thandledCPCountPlusOne = handledCPCount + 1;\n\t\t\tif (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tdelta += (m - n) * handledCPCountPlusOne;\n\t\t\tn = m;\n\n\t\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\n\t\t\t\tif (currentValue < n && ++delta > maxInt) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tif (currentValue == n) {\n\t\t\t\t\t// Represent delta as a generalized variable-length integer\n\t\t\t\t\tfor (q = delta, k = base; /* no condition */; k += base) {\n\t\t\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\t\t\t\t\t\tif (q < t) {\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tqMinusT = q - t;\n\t\t\t\t\t\tbaseMinusT = base - t;\n\t\t\t\t\t\toutput.push(\n\t\t\t\t\t\t\tstringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))\n\t\t\t\t\t\t);\n\t\t\t\t\t\tq = floor(qMinusT / baseMinusT);\n\t\t\t\t\t}\n\n\t\t\t\t\toutput.push(stringFromCharCode(digitToBasic(q, 0)));\n\t\t\t\t\tbias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n\t\t\t\t\tdelta = 0;\n\t\t\t\t\t++handledCPCount;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t++delta;\n\t\t\t++n;\n\n\t\t}\n\t\treturn output.join('');\n\t}\n\n\t/**\n\t * Converts a Punycode string representing a domain name or an email address\n\t * to Unicode. Only the Punycoded parts of the input will be converted, i.e.\n\t * it doesn't matter if you call it on a string that has already been\n\t * converted to Unicode.\n\t * @memberOf punycode\n\t * @param {String} input The Punycoded domain name or email address to\n\t * convert to Unicode.\n\t * @returns {String} The Unicode representation of the given Punycode\n\t * string.\n\t */\n\tfunction toUnicode(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexPunycode.test(string)\n\t\t\t\t? decode(string.slice(4).toLowerCase())\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/**\n\t * Converts a Unicode string representing a domain name or an email address to\n\t * Punycode. Only the non-ASCII parts of the domain name will be converted,\n\t * i.e. it doesn't matter if you call it with a domain that's already in\n\t * ASCII.\n\t * @memberOf punycode\n\t * @param {String} input The domain name or email address to convert, as a\n\t * Unicode string.\n\t * @returns {String} The Punycode representation of the given domain name or\n\t * email address.\n\t */\n\tfunction toASCII(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexNonASCII.test(string)\n\t\t\t\t? 'xn--' + encode(string)\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/** Define the public API */\n\tpunycode = {\n\t\t/**\n\t\t * A string representing the current Punycode.js version number.\n\t\t * @memberOf punycode\n\t\t * @type String\n\t\t */\n\t\t'version': '1.4.1',\n\t\t/**\n\t\t * An object of methods to convert from JavaScript's internal character\n\t\t * representation (UCS-2) to Unicode code points, and back.\n\t\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t\t * @memberOf punycode\n\t\t * @type Object\n\t\t */\n\t\t'ucs2': {\n\t\t\t'decode': ucs2decode,\n\t\t\t'encode': ucs2encode\n\t\t},\n\t\t'decode': decode,\n\t\t'encode': encode,\n\t\t'toASCII': toASCII,\n\t\t'toUnicode': toUnicode\n\t};\n\n\t/** Expose `punycode` */\n\t// Some AMD build optimizers, like r.js, check for specific condition patterns\n\t// like the following:\n\tif (\n\t\ttypeof define == 'function' &&\n\t\ttypeof define.amd == 'object' &&\n\t\tdefine.amd\n\t) {\n\t\tdefine('punycode', function() {\n\t\t\treturn punycode;\n\t\t});\n\t} else if (freeExports && freeModule) {\n\t\tif (module.exports == freeExports) {\n\t\t\t// in Node.js, io.js, or RingoJS v0.8.0+\n\t\t\tfreeModule.exports = punycode;\n\t\t} else {\n\t\t\t// in Narwhal or RingoJS v0.7.0-\n\t\t\tfor (key in punycode) {\n\t\t\t\tpunycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);\n\t\t\t}\n\t\t}\n\t} else {\n\t\t// in Rhino or a web browser\n\t\troot.punycode = punycode;\n\t}\n\n}(this));\n","\r\n/**\r\n * Expose `Emitter`.\r\n */\r\n\r\nif (typeof module !== 'undefined') {\r\n  module.exports = Emitter;\r\n}\r\n\r\n/**\r\n * Initialize a new `Emitter`.\r\n *\r\n * @api public\r\n */\r\n\r\nfunction Emitter(obj) {\r\n  if (obj) return mixin(obj);\r\n};\r\n\r\n/**\r\n * Mixin the emitter properties.\r\n *\r\n * @param {Object} obj\r\n * @return {Object}\r\n * @api private\r\n */\r\n\r\nfunction mixin(obj) {\r\n  for (var key in Emitter.prototype) {\r\n    obj[key] = Emitter.prototype[key];\r\n  }\r\n  return obj;\r\n}\r\n\r\n/**\r\n * Listen on the given `event` with `fn`.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.on =\r\nEmitter.prototype.addEventListener = function(event, fn){\r\n  this._callbacks = this._callbacks || {};\r\n  (this._callbacks['$' + event] = this._callbacks['$' + event] || [])\r\n    .push(fn);\r\n  return this;\r\n};\r\n\r\n/**\r\n * Adds an `event` listener that will be invoked a single\r\n * time then automatically removed.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.once = function(event, fn){\r\n  function on() {\r\n    this.off(event, on);\r\n    fn.apply(this, arguments);\r\n  }\r\n\r\n  on.fn = fn;\r\n  this.on(event, on);\r\n  return this;\r\n};\r\n\r\n/**\r\n * Remove the given callback for `event` or all\r\n * registered callbacks.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.off =\r\nEmitter.prototype.removeListener =\r\nEmitter.prototype.removeAllListeners =\r\nEmitter.prototype.removeEventListener = function(event, fn){\r\n  this._callbacks = this._callbacks || {};\r\n\r\n  // all\r\n  if (0 == arguments.length) {\r\n    this._callbacks = {};\r\n    return this;\r\n  }\r\n\r\n  // specific event\r\n  var callbacks = this._callbacks['$' + event];\r\n  if (!callbacks) return this;\r\n\r\n  // remove all handlers\r\n  if (1 == arguments.length) {\r\n    delete this._callbacks['$' + event];\r\n    return this;\r\n  }\r\n\r\n  // remove specific handler\r\n  var cb;\r\n  for (var i = 0; i < callbacks.length; i++) {\r\n    cb = callbacks[i];\r\n    if (cb === fn || cb.fn === fn) {\r\n      callbacks.splice(i, 1);\r\n      break;\r\n    }\r\n  }\r\n  return this;\r\n};\r\n\r\n/**\r\n * Emit `event` with the given args.\r\n *\r\n * @param {String} event\r\n * @param {Mixed} ...\r\n * @return {Emitter}\r\n */\r\n\r\nEmitter.prototype.emit = function(event){\r\n  this._callbacks = this._callbacks || {};\r\n  var args = [].slice.call(arguments, 1)\r\n    , callbacks = this._callbacks['$' + event];\r\n\r\n  if (callbacks) {\r\n    callbacks = callbacks.slice(0);\r\n    for (var i = 0, len = callbacks.length; i < len; ++i) {\r\n      callbacks[i].apply(this, args);\r\n    }\r\n  }\r\n\r\n  return this;\r\n};\r\n\r\n/**\r\n * Return array of callbacks for `event`.\r\n *\r\n * @param {String} event\r\n * @return {Array}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.listeners = function(event){\r\n  this._callbacks = this._callbacks || {};\r\n  return this._callbacks['$' + event] || [];\r\n};\r\n\r\n/**\r\n * Check if this emitter has `event` handlers.\r\n *\r\n * @param {String} event\r\n * @return {Boolean}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.hasListeners = function(event){\r\n  return !! this.listeners(event).length;\r\n};\r\n","/**\n * Copyright (c) 2014, Chris Pettitt\n * All rights reserved.\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are met:\n *\n * 1. Redistributions of source code must retain the above copyright notice, this\n * list of conditions and the following disclaimer.\n *\n * 2. Redistributions in binary form must reproduce the above copyright notice,\n * this list of conditions and the following disclaimer in the documentation\n * and/or other materials provided with the distribution.\n *\n * 3. Neither the name of the copyright holder nor the names of its contributors\n * may be used to endorse or promote products derived from this software without\n * specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND\n * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE\n * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\n * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR\n * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER\n * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\nvar lib = require(\"./lib\");\n\nmodule.exports = {\n  Graph: lib.Graph,\n  json: require(\"./lib/json\"),\n  alg: require(\"./lib/alg\"),\n  version: lib.version\n};\n","var _ = require(\"../lodash\");\n\nmodule.exports = components;\n\nfunction components(g) {\n  var visited = {},\n      cmpts = [],\n      cmpt;\n\n  function dfs(v) {\n    if (_.has(visited, v)) return;\n    visited[v] = true;\n    cmpt.push(v);\n    _.each(g.successors(v), dfs);\n    _.each(g.predecessors(v), dfs);\n  }\n\n  _.each(g.nodes(), function(v) {\n    cmpt = [];\n    dfs(v);\n    if (cmpt.length) {\n      cmpts.push(cmpt);\n    }\n  });\n\n  return cmpts;\n}\n","var _ = require(\"../lodash\");\n\nmodule.exports = dfs;\n\n/*\n * A helper that preforms a pre- or post-order traversal on the input graph\n * and returns the nodes in the order they were visited. If the graph is\n * undirected then this algorithm will navigate using neighbors. If the graph\n * is directed then this algorithm will navigate using successors.\n *\n * Order must be one of \"pre\" or \"post\".\n */\nfunction dfs(g, vs, order) {\n  if (!_.isArray(vs)) {\n    vs = [vs];\n  }\n\n  var navigation = (g.isDirected() ? g.successors : g.neighbors).bind(g);\n\n  var acc = [],\n      visited = {};\n  _.each(vs, function(v) {\n    if (!g.hasNode(v)) {\n      throw new Error(\"Graph does not have node: \" + v);\n    }\n\n    doDfs(g, v, order === \"post\", visited, navigation, acc);\n  });\n  return acc;\n}\n\nfunction doDfs(g, v, postorder, visited, navigation, acc) {\n  if (!_.has(visited, v)) {\n    visited[v] = true;\n\n    if (!postorder) { acc.push(v); }\n    _.each(navigation(v), function(w) {\n      doDfs(g, w, postorder, visited, navigation, acc);\n    });\n    if (postorder) { acc.push(v); }\n  }\n}\n","var dijkstra = require(\"./dijkstra\"),\n    _ = require(\"../lodash\");\n\nmodule.exports = dijkstraAll;\n\nfunction dijkstraAll(g, weightFunc, edgeFunc) {\n  return _.transform(g.nodes(), function(acc, v) {\n    acc[v] = dijkstra(g, v, weightFunc, edgeFunc);\n  }, {});\n}\n","var _ = require(\"../lodash\"),\n    PriorityQueue = require(\"../data/priority-queue\");\n\nmodule.exports = dijkstra;\n\nvar DEFAULT_WEIGHT_FUNC = _.constant(1);\n\nfunction dijkstra(g, source, weightFn, edgeFn) {\n  return runDijkstra(g, String(source),\n                     weightFn || DEFAULT_WEIGHT_FUNC,\n                     edgeFn || function(v) { return g.outEdges(v); });\n}\n\nfunction runDijkstra(g, source, weightFn, edgeFn) {\n  var results = {},\n      pq = new PriorityQueue(),\n      v, vEntry;\n\n  var updateNeighbors = function(edge) {\n    var w = edge.v !== v ? edge.v : edge.w,\n        wEntry = results[w],\n        weight = weightFn(edge),\n        distance = vEntry.distance + weight;\n\n    if (weight < 0) {\n      throw new Error(\"dijkstra does not allow negative edge weights. \" +\n                      \"Bad edge: \" + edge + \" Weight: \" + weight);\n    }\n\n    if (distance < wEntry.distance) {\n      wEntry.distance = distance;\n      wEntry.predecessor = v;\n      pq.decrease(w, distance);\n    }\n  };\n\n  g.nodes().forEach(function(v) {\n    var distance = v === source ? 0 : Number.POSITIVE_INFINITY;\n    results[v] = { distance: distance };\n    pq.add(v, distance);\n  });\n\n  while (pq.size() > 0) {\n    v = pq.removeMin();\n    vEntry = results[v];\n    if (vEntry.distance === Number.POSITIVE_INFINITY) {\n      break;\n    }\n\n    edgeFn(v).forEach(updateNeighbors);\n  }\n\n  return results;\n}\n","var _ = require(\"../lodash\"),\n    tarjan = require(\"./tarjan\");\n\nmodule.exports = findCycles;\n\nfunction findCycles(g) {\n  return _.filter(tarjan(g), function(cmpt) {\n    return cmpt.length > 1 || (cmpt.length === 1 && g.hasEdge(cmpt[0], cmpt[0]));\n  });\n}\n","var _ = require(\"../lodash\");\n\nmodule.exports = floydWarshall;\n\nvar DEFAULT_WEIGHT_FUNC = _.constant(1);\n\nfunction floydWarshall(g, weightFn, edgeFn) {\n  return runFloydWarshall(g,\n                          weightFn || DEFAULT_WEIGHT_FUNC,\n                          edgeFn || function(v) { return g.outEdges(v); });\n}\n\nfunction runFloydWarshall(g, weightFn, edgeFn) {\n  var results = {},\n      nodes = g.nodes();\n\n  nodes.forEach(function(v) {\n    results[v] = {};\n    results[v][v] = { distance: 0 };\n    nodes.forEach(function(w) {\n      if (v !== w) {\n        results[v][w] = { distance: Number.POSITIVE_INFINITY };\n      }\n    });\n    edgeFn(v).forEach(function(edge) {\n      var w = edge.v === v ? edge.w : edge.v,\n          d = weightFn(edge);\n      results[v][w] = { distance: d, predecessor: v };\n    });\n  });\n\n  nodes.forEach(function(k) {\n    var rowK = results[k];\n    nodes.forEach(function(i) {\n      var rowI = results[i];\n      nodes.forEach(function(j) {\n        var ik = rowI[k];\n        var kj = rowK[j];\n        var ij = rowI[j];\n        var altDistance = ik.distance + kj.distance;\n        if (altDistance < ij.distance) {\n          ij.distance = altDistance;\n          ij.predecessor = kj.predecessor;\n        }\n      });\n    });\n  });\n\n  return results;\n}\n","module.exports = {\n  components: require(\"./components\"),\n  dijkstra: require(\"./dijkstra\"),\n  dijkstraAll: require(\"./dijkstra-all\"),\n  findCycles: require(\"./find-cycles\"),\n  floydWarshall: require(\"./floyd-warshall\"),\n  isAcyclic: require(\"./is-acyclic\"),\n  postorder: require(\"./postorder\"),\n  preorder: require(\"./preorder\"),\n  prim: require(\"./prim\"),\n  tarjan: require(\"./tarjan\"),\n  topsort: require(\"./topsort\")\n};\n","var topsort = require(\"./topsort\");\n\nmodule.exports = isAcyclic;\n\nfunction isAcyclic(g) {\n  try {\n    topsort(g);\n  } catch (e) {\n    if (e instanceof topsort.CycleException) {\n      return false;\n    }\n    throw e;\n  }\n  return true;\n}\n","var dfs = require(\"./dfs\");\n\nmodule.exports = postorder;\n\nfunction postorder(g, vs) {\n  return dfs(g, vs, \"post\");\n}\n","var dfs = require(\"./dfs\");\n\nmodule.exports = preorder;\n\nfunction preorder(g, vs) {\n  return dfs(g, vs, \"pre\");\n}\n","var _ = require(\"../lodash\"),\n    Graph = require(\"../graph\"),\n    PriorityQueue = require(\"../data/priority-queue\");\n\nmodule.exports = prim;\n\nfunction prim(g, weightFunc) {\n  var result = new Graph(),\n      parents = {},\n      pq = new PriorityQueue(),\n      v;\n\n  function updateNeighbors(edge) {\n    var w = edge.v === v ? edge.w : edge.v,\n        pri = pq.priority(w);\n    if (pri !== undefined) {\n      var edgeWeight = weightFunc(edge);\n      if (edgeWeight < pri) {\n        parents[w] = v;\n        pq.decrease(w, edgeWeight);\n      }\n    }\n  }\n\n  if (g.nodeCount() === 0) {\n    return result;\n  }\n\n  _.each(g.nodes(), function(v) {\n    pq.add(v, Number.POSITIVE_INFINITY);\n    result.setNode(v);\n  });\n\n  // Start from an arbitrary node\n  pq.decrease(g.nodes()[0], 0);\n\n  var init = false;\n  while (pq.size() > 0) {\n    v = pq.removeMin();\n    if (_.has(parents, v)) {\n      result.setEdge(v, parents[v]);\n    } else if (init) {\n      throw new Error(\"Input graph is not connected: \" + g);\n    } else {\n      init = true;\n    }\n\n    g.nodeEdges(v).forEach(updateNeighbors);\n  }\n\n  return result;\n}\n","var _ = require(\"../lodash\");\n\nmodule.exports = tarjan;\n\nfunction tarjan(g) {\n  var index = 0,\n      stack = [],\n      visited = {}, // node id -> { onStack, lowlink, index }\n      results = [];\n\n  function dfs(v) {\n    var entry = visited[v] = {\n      onStack: true,\n      lowlink: index,\n      index: index++\n    };\n    stack.push(v);\n\n    g.successors(v).forEach(function(w) {\n      if (!_.has(visited, w)) {\n        dfs(w);\n        entry.lowlink = Math.min(entry.lowlink, visited[w].lowlink);\n      } else if (visited[w].onStack) {\n        entry.lowlink = Math.min(entry.lowlink, visited[w].index);\n      }\n    });\n\n    if (entry.lowlink === entry.index) {\n      var cmpt = [],\n          w;\n      do {\n        w = stack.pop();\n        visited[w].onStack = false;\n        cmpt.push(w);\n      } while (v !== w);\n      results.push(cmpt);\n    }\n  }\n\n  g.nodes().forEach(function(v) {\n    if (!_.has(visited, v)) {\n      dfs(v);\n    }\n  });\n\n  return results;\n}\n","var _ = require(\"../lodash\");\n\nmodule.exports = topsort;\ntopsort.CycleException = CycleException;\n\nfunction topsort(g) {\n  var visited = {},\n      stack = {},\n      results = [];\n\n  function visit(node) {\n    if (_.has(stack, node)) {\n      throw new CycleException();\n    }\n\n    if (!_.has(visited, node)) {\n      stack[node] = true;\n      visited[node] = true;\n      _.each(g.predecessors(node), visit);\n      delete stack[node];\n      results.push(node);\n    }\n  }\n\n  _.each(g.sinks(), visit);\n\n  if (_.size(visited) !== g.nodeCount()) {\n    throw new CycleException();\n  }\n\n  return results;\n}\n\nfunction CycleException() {}\n","var _ = require(\"../lodash\");\n\nmodule.exports = PriorityQueue;\n\n/**\n * A min-priority queue data structure. This algorithm is derived from Cormen,\n * et al., \"Introduction to Algorithms\". The basic idea of a min-priority\n * queue is that you can efficiently (in O(1) time) get the smallest key in\n * the queue. Adding and removing elements takes O(log n) time. A key can\n * have its priority decreased in O(log n) time.\n */\nfunction PriorityQueue() {\n  this._arr = [];\n  this._keyIndices = {};\n}\n\n/**\n * Returns the number of elements in the queue. Takes `O(1)` time.\n */\nPriorityQueue.prototype.size = function() {\n  return this._arr.length;\n};\n\n/**\n * Returns the keys that are in the queue. Takes `O(n)` time.\n */\nPriorityQueue.prototype.keys = function() {\n  return this._arr.map(function(x) { return x.key; });\n};\n\n/**\n * Returns `true` if **key** is in the queue and `false` if not.\n */\nPriorityQueue.prototype.has = function(key) {\n  return _.has(this._keyIndices, key);\n};\n\n/**\n * Returns the priority for **key**. If **key** is not present in the queue\n * then this function returns `undefined`. Takes `O(1)` time.\n *\n * @param {Object} key\n */\nPriorityQueue.prototype.priority = function(key) {\n  var index = this._keyIndices[key];\n  if (index !== undefined) {\n    return this._arr[index].priority;\n  }\n};\n\n/**\n * Returns the key for the minimum element in this queue. If the queue is\n * empty this function throws an Error. Takes `O(1)` time.\n */\nPriorityQueue.prototype.min = function() {\n  if (this.size() === 0) {\n    throw new Error(\"Queue underflow\");\n  }\n  return this._arr[0].key;\n};\n\n/**\n * Inserts a new key into the priority queue. If the key already exists in\n * the queue this function returns `false`; otherwise it will return `true`.\n * Takes `O(n)` time.\n *\n * @param {Object} key the key to add\n * @param {Number} priority the initial priority for the key\n */\nPriorityQueue.prototype.add = function(key, priority) {\n  var keyIndices = this._keyIndices;\n  key = String(key);\n  if (!_.has(keyIndices, key)) {\n    var arr = this._arr;\n    var index = arr.length;\n    keyIndices[key] = index;\n    arr.push({key: key, priority: priority});\n    this._decrease(index);\n    return true;\n  }\n  return false;\n};\n\n/**\n * Removes and returns the smallest key in the queue. Takes `O(log n)` time.\n */\nPriorityQueue.prototype.removeMin = function() {\n  this._swap(0, this._arr.length - 1);\n  var min = this._arr.pop();\n  delete this._keyIndices[min.key];\n  this._heapify(0);\n  return min.key;\n};\n\n/**\n * Decreases the priority for **key** to **priority**. If the new priority is\n * greater than the previous priority, this function will throw an Error.\n *\n * @param {Object} key the key for which to raise priority\n * @param {Number} priority the new priority for the key\n */\nPriorityQueue.prototype.decrease = function(key, priority) {\n  var index = this._keyIndices[key];\n  if (priority > this._arr[index].priority) {\n    throw new Error(\"New priority is greater than current priority. \" +\n        \"Key: \" + key + \" Old: \" + this._arr[index].priority + \" New: \" + priority);\n  }\n  this._arr[index].priority = priority;\n  this._decrease(index);\n};\n\nPriorityQueue.prototype._heapify = function(i) {\n  var arr = this._arr;\n  var l = 2 * i,\n      r = l + 1,\n      largest = i;\n  if (l < arr.length) {\n    largest = arr[l].priority < arr[largest].priority ? l : largest;\n    if (r < arr.length) {\n      largest = arr[r].priority < arr[largest].priority ? r : largest;\n    }\n    if (largest !== i) {\n      this._swap(i, largest);\n      this._heapify(largest);\n    }\n  }\n};\n\nPriorityQueue.prototype._decrease = function(index) {\n  var arr = this._arr;\n  var priority = arr[index].priority;\n  var parent;\n  while (index !== 0) {\n    parent = index >> 1;\n    if (arr[parent].priority < priority) {\n      break;\n    }\n    this._swap(index, parent);\n    index = parent;\n  }\n};\n\nPriorityQueue.prototype._swap = function(i, j) {\n  var arr = this._arr;\n  var keyIndices = this._keyIndices;\n  var origArrI = arr[i];\n  var origArrJ = arr[j];\n  arr[i] = origArrJ;\n  arr[j] = origArrI;\n  keyIndices[origArrJ.key] = i;\n  keyIndices[origArrI.key] = j;\n};\n","\"use strict\";\n\nvar _ = require(\"./lodash\");\n\nmodule.exports = Graph;\n\nvar DEFAULT_EDGE_NAME = \"\\x00\",\n    GRAPH_NODE = \"\\x00\",\n    EDGE_KEY_DELIM = \"\\x01\";\n\n// Implementation notes:\n//\n//  * Node id query functions should return string ids for the nodes\n//  * Edge id query functions should return an \"edgeObj\", edge object, that is\n//    composed of enough information to uniquely identify an edge: {v, w, name}.\n//  * Internally we use an \"edgeId\", a stringified form of the edgeObj, to\n//    reference edges. This is because we need a performant way to look these\n//    edges up and, object properties, which have string keys, are the closest\n//    we're going to get to a performant hashtable in JavaScript.\n\nfunction Graph(opts) {\n  this._isDirected = _.has(opts, \"directed\") ? opts.directed : true;\n  this._isMultigraph = _.has(opts, \"multigraph\") ? opts.multigraph : false;\n  this._isCompound = _.has(opts, \"compound\") ? opts.compound : false;\n\n  // Label for the graph itself\n  this._label = undefined;\n\n  // Defaults to be set when creating a new node\n  this._defaultNodeLabelFn = _.constant(undefined);\n\n  // Defaults to be set when creating a new edge\n  this._defaultEdgeLabelFn = _.constant(undefined);\n\n  // v -> label\n  this._nodes = {};\n\n  if (this._isCompound) {\n    // v -> parent\n    this._parent = {};\n\n    // v -> children\n    this._children = {};\n    this._children[GRAPH_NODE] = {};\n  }\n\n  // v -> edgeObj\n  this._in = {};\n\n  // u -> v -> Number\n  this._preds = {};\n\n  // v -> edgeObj\n  this._out = {};\n\n  // v -> w -> Number\n  this._sucs = {};\n\n  // e -> edgeObj\n  this._edgeObjs = {};\n\n  // e -> label\n  this._edgeLabels = {};\n}\n\n/* Number of nodes in the graph. Should only be changed by the implementation. */\nGraph.prototype._nodeCount = 0;\n\n/* Number of edges in the graph. Should only be changed by the implementation. */\nGraph.prototype._edgeCount = 0;\n\n\n/* === Graph functions ========= */\n\nGraph.prototype.isDirected = function() {\n  return this._isDirected;\n};\n\nGraph.prototype.isMultigraph = function() {\n  return this._isMultigraph;\n};\n\nGraph.prototype.isCompound = function() {\n  return this._isCompound;\n};\n\nGraph.prototype.setGraph = function(label) {\n  this._label = label;\n  return this;\n};\n\nGraph.prototype.graph = function() {\n  return this._label;\n};\n\n\n/* === Node functions ========== */\n\nGraph.prototype.setDefaultNodeLabel = function(newDefault) {\n  if (!_.isFunction(newDefault)) {\n    newDefault = _.constant(newDefault);\n  }\n  this._defaultNodeLabelFn = newDefault;\n  return this;\n};\n\nGraph.prototype.nodeCount = function() {\n  return this._nodeCount;\n};\n\nGraph.prototype.nodes = function() {\n  return _.keys(this._nodes);\n};\n\nGraph.prototype.sources = function() {\n  var self = this;\n  return _.filter(this.nodes(), function(v) {\n    return _.isEmpty(self._in[v]);\n  });\n};\n\nGraph.prototype.sinks = function() {\n  var self = this;\n  return _.filter(this.nodes(), function(v) {\n    return _.isEmpty(self._out[v]);\n  });\n};\n\nGraph.prototype.setNodes = function(vs, value) {\n  var args = arguments;\n  var self = this;\n  _.each(vs, function(v) {\n    if (args.length > 1) {\n      self.setNode(v, value);\n    } else {\n      self.setNode(v);\n    }\n  });\n  return this;\n};\n\nGraph.prototype.setNode = function(v, value) {\n  if (_.has(this._nodes, v)) {\n    if (arguments.length > 1) {\n      this._nodes[v] = value;\n    }\n    return this;\n  }\n\n  this._nodes[v] = arguments.length > 1 ? value : this._defaultNodeLabelFn(v);\n  if (this._isCompound) {\n    this._parent[v] = GRAPH_NODE;\n    this._children[v] = {};\n    this._children[GRAPH_NODE][v] = true;\n  }\n  this._in[v] = {};\n  this._preds[v] = {};\n  this._out[v] = {};\n  this._sucs[v] = {};\n  ++this._nodeCount;\n  return this;\n};\n\nGraph.prototype.node = function(v) {\n  return this._nodes[v];\n};\n\nGraph.prototype.hasNode = function(v) {\n  return _.has(this._nodes, v);\n};\n\nGraph.prototype.removeNode =  function(v) {\n  var self = this;\n  if (_.has(this._nodes, v)) {\n    var removeEdge = function(e) { self.removeEdge(self._edgeObjs[e]); };\n    delete this._nodes[v];\n    if (this._isCompound) {\n      this._removeFromParentsChildList(v);\n      delete this._parent[v];\n      _.each(this.children(v), function(child) {\n        self.setParent(child);\n      });\n      delete this._children[v];\n    }\n    _.each(_.keys(this._in[v]), removeEdge);\n    delete this._in[v];\n    delete this._preds[v];\n    _.each(_.keys(this._out[v]), removeEdge);\n    delete this._out[v];\n    delete this._sucs[v];\n    --this._nodeCount;\n  }\n  return this;\n};\n\nGraph.prototype.setParent = function(v, parent) {\n  if (!this._isCompound) {\n    throw new Error(\"Cannot set parent in a non-compound graph\");\n  }\n\n  if (_.isUndefined(parent)) {\n    parent = GRAPH_NODE;\n  } else {\n    // Coerce parent to string\n    parent += \"\";\n    for (var ancestor = parent;\n         !_.isUndefined(ancestor);\n         ancestor = this.parent(ancestor)) {\n      if (ancestor === v) {\n        throw new Error(\"Setting \" + parent+ \" as parent of \" + v +\n                        \" would create a cycle\");\n      }\n    }\n\n    this.setNode(parent);\n  }\n\n  this.setNode(v);\n  this._removeFromParentsChildList(v);\n  this._parent[v] = parent;\n  this._children[parent][v] = true;\n  return this;\n};\n\nGraph.prototype._removeFromParentsChildList = function(v) {\n  delete this._children[this._parent[v]][v];\n};\n\nGraph.prototype.parent = function(v) {\n  if (this._isCompound) {\n    var parent = this._parent[v];\n    if (parent !== GRAPH_NODE) {\n      return parent;\n    }\n  }\n};\n\nGraph.prototype.children = function(v) {\n  if (_.isUndefined(v)) {\n    v = GRAPH_NODE;\n  }\n\n  if (this._isCompound) {\n    var children = this._children[v];\n    if (children) {\n      return _.keys(children);\n    }\n  } else if (v === GRAPH_NODE) {\n    return this.nodes();\n  } else if (this.hasNode(v)) {\n    return [];\n  }\n};\n\nGraph.prototype.predecessors = function(v) {\n  var predsV = this._preds[v];\n  if (predsV) {\n    return _.keys(predsV);\n  }\n};\n\nGraph.prototype.successors = function(v) {\n  var sucsV = this._sucs[v];\n  if (sucsV) {\n    return _.keys(sucsV);\n  }\n};\n\nGraph.prototype.neighbors = function(v) {\n  var preds = this.predecessors(v);\n  if (preds) {\n    return _.union(preds, this.successors(v));\n  }\n};\n\nGraph.prototype.isLeaf = function (v) {\n  var neighbors;\n  if (this.isDirected()) {\n    neighbors = this.successors(v);\n  } else {\n    neighbors = this.neighbors(v);\n  }\n  return neighbors.length === 0;\n};\n\nGraph.prototype.filterNodes = function(filter) {\n  var copy = new this.constructor({\n    directed: this._isDirected,\n    multigraph: this._isMultigraph,\n    compound: this._isCompound\n  });\n\n  copy.setGraph(this.graph());\n\n  var self = this;\n  _.each(this._nodes, function(value, v) {\n    if (filter(v)) {\n      copy.setNode(v, value);\n    }\n  });\n\n  _.each(this._edgeObjs, function(e) {\n    if (copy.hasNode(e.v) && copy.hasNode(e.w)) {\n      copy.setEdge(e, self.edge(e));\n    }\n  });\n\n  var parents = {};\n  function findParent(v) {\n    var parent = self.parent(v);\n    if (parent === undefined || copy.hasNode(parent)) {\n      parents[v] = parent;\n      return parent;\n    } else if (parent in parents) {\n      return parents[parent];\n    } else {\n      return findParent(parent);\n    }\n  }\n\n  if (this._isCompound) {\n    _.each(copy.nodes(), function(v) {\n      copy.setParent(v, findParent(v));\n    });\n  }\n\n  return copy;\n};\n\n/* === Edge functions ========== */\n\nGraph.prototype.setDefaultEdgeLabel = function(newDefault) {\n  if (!_.isFunction(newDefault)) {\n    newDefault = _.constant(newDefault);\n  }\n  this._defaultEdgeLabelFn = newDefault;\n  return this;\n};\n\nGraph.prototype.edgeCount = function() {\n  return this._edgeCount;\n};\n\nGraph.prototype.edges = function() {\n  return _.values(this._edgeObjs);\n};\n\nGraph.prototype.setPath = function(vs, value) {\n  var self = this,\n      args = arguments;\n  _.reduce(vs, function(v, w) {\n    if (args.length > 1) {\n      self.setEdge(v, w, value);\n    } else {\n      self.setEdge(v, w);\n    }\n    return w;\n  });\n  return this;\n};\n\n/*\n * setEdge(v, w, [value, [name]])\n * setEdge({ v, w, [name] }, [value])\n */\nGraph.prototype.setEdge = function() {\n  var v, w, name, value,\n      valueSpecified = false,\n      arg0 = arguments[0];\n\n  if (typeof arg0 === \"object\" && arg0 !== null && \"v\" in arg0) {\n    v = arg0.v;\n    w = arg0.w;\n    name = arg0.name;\n    if (arguments.length === 2) {\n      value = arguments[1];\n      valueSpecified = true;\n    }\n  } else {\n    v = arg0;\n    w = arguments[1];\n    name = arguments[3];\n    if (arguments.length > 2) {\n      value = arguments[2];\n      valueSpecified = true;\n    }\n  }\n\n  v = \"\" + v;\n  w = \"\" + w;\n  if (!_.isUndefined(name)) {\n    name = \"\" + name;\n  }\n\n  var e = edgeArgsToId(this._isDirected, v, w, name);\n  if (_.has(this._edgeLabels, e)) {\n    if (valueSpecified) {\n      this._edgeLabels[e] = value;\n    }\n    return this;\n  }\n\n  if (!_.isUndefined(name) && !this._isMultigraph) {\n    throw new Error(\"Cannot set a named edge when isMultigraph = false\");\n  }\n\n  // It didn't exist, so we need to create it.\n  // First ensure the nodes exist.\n  this.setNode(v);\n  this.setNode(w);\n\n  this._edgeLabels[e] = valueSpecified ? value : this._defaultEdgeLabelFn(v, w, name);\n\n  var edgeObj = edgeArgsToObj(this._isDirected, v, w, name);\n  // Ensure we add undirected edges in a consistent way.\n  v = edgeObj.v;\n  w = edgeObj.w;\n\n  Object.freeze(edgeObj);\n  this._edgeObjs[e] = edgeObj;\n  incrementOrInitEntry(this._preds[w], v);\n  incrementOrInitEntry(this._sucs[v], w);\n  this._in[w][e] = edgeObj;\n  this._out[v][e] = edgeObj;\n  this._edgeCount++;\n  return this;\n};\n\nGraph.prototype.edge = function(v, w, name) {\n  var e = (arguments.length === 1\n            ? edgeObjToId(this._isDirected, arguments[0])\n            : edgeArgsToId(this._isDirected, v, w, name));\n  return this._edgeLabels[e];\n};\n\nGraph.prototype.hasEdge = function(v, w, name) {\n  var e = (arguments.length === 1\n            ? edgeObjToId(this._isDirected, arguments[0])\n            : edgeArgsToId(this._isDirected, v, w, name));\n  return _.has(this._edgeLabels, e);\n};\n\nGraph.prototype.removeEdge = function(v, w, name) {\n  var e = (arguments.length === 1\n            ? edgeObjToId(this._isDirected, arguments[0])\n            : edgeArgsToId(this._isDirected, v, w, name)),\n      edge = this._edgeObjs[e];\n  if (edge) {\n    v = edge.v;\n    w = edge.w;\n    delete this._edgeLabels[e];\n    delete this._edgeObjs[e];\n    decrementOrRemoveEntry(this._preds[w], v);\n    decrementOrRemoveEntry(this._sucs[v], w);\n    delete this._in[w][e];\n    delete this._out[v][e];\n    this._edgeCount--;\n  }\n  return this;\n};\n\nGraph.prototype.inEdges = function(v, u) {\n  var inV = this._in[v];\n  if (inV) {\n    var edges = _.values(inV);\n    if (!u) {\n      return edges;\n    }\n    return _.filter(edges, function(edge) { return edge.v === u; });\n  }\n};\n\nGraph.prototype.outEdges = function(v, w) {\n  var outV = this._out[v];\n  if (outV) {\n    var edges = _.values(outV);\n    if (!w) {\n      return edges;\n    }\n    return _.filter(edges, function(edge) { return edge.w === w; });\n  }\n};\n\nGraph.prototype.nodeEdges = function(v, w) {\n  var inEdges = this.inEdges(v, w);\n  if (inEdges) {\n    return inEdges.concat(this.outEdges(v, w));\n  }\n};\n\nfunction incrementOrInitEntry(map, k) {\n  if (map[k]) {\n    map[k]++;\n  } else {\n    map[k] = 1;\n  }\n}\n\nfunction decrementOrRemoveEntry(map, k) {\n  if (!--map[k]) { delete map[k]; }\n}\n\nfunction edgeArgsToId(isDirected, v_, w_, name) {\n  var v = \"\" + v_;\n  var w = \"\" + w_;\n  if (!isDirected && v > w) {\n    var tmp = v;\n    v = w;\n    w = tmp;\n  }\n  return v + EDGE_KEY_DELIM + w + EDGE_KEY_DELIM +\n             (_.isUndefined(name) ? DEFAULT_EDGE_NAME : name);\n}\n\nfunction edgeArgsToObj(isDirected, v_, w_, name) {\n  var v = \"\" + v_;\n  var w = \"\" + w_;\n  if (!isDirected && v > w) {\n    var tmp = v;\n    v = w;\n    w = tmp;\n  }\n  var edgeObj =  { v: v, w: w };\n  if (name) {\n    edgeObj.name = name;\n  }\n  return edgeObj;\n}\n\nfunction edgeObjToId(isDirected, edgeObj) {\n  return edgeArgsToId(isDirected, edgeObj.v, edgeObj.w, edgeObj.name);\n}\n","// Includes only the \"core\" of graphlib\nmodule.exports = {\n  Graph: require(\"./graph\"),\n  version: require(\"./version\")\n};\n","var _ = require(\"./lodash\"),\n    Graph = require(\"./graph\");\n\nmodule.exports = {\n  write: write,\n  read: read\n};\n\nfunction write(g) {\n  var json = {\n    options: {\n      directed: g.isDirected(),\n      multigraph: g.isMultigraph(),\n      compound: g.isCompound()\n    },\n    nodes: writeNodes(g),\n    edges: writeEdges(g)\n  };\n  if (!_.isUndefined(g.graph())) {\n    json.value = _.clone(g.graph());\n  }\n  return json;\n}\n\nfunction writeNodes(g) {\n  return _.map(g.nodes(), function(v) {\n    var nodeValue = g.node(v),\n        parent = g.parent(v),\n        node = { v: v };\n    if (!_.isUndefined(nodeValue)) {\n      node.value = nodeValue;\n    }\n    if (!_.isUndefined(parent)) {\n      node.parent = parent;\n    }\n    return node;\n  });\n}\n\nfunction writeEdges(g) {\n  return _.map(g.edges(), function(e) {\n    var edgeValue = g.edge(e),\n        edge = { v: e.v, w: e.w };\n    if (!_.isUndefined(e.name)) {\n      edge.name = e.name;\n    }\n    if (!_.isUndefined(edgeValue)) {\n      edge.value = edgeValue;\n    }\n    return edge;\n  });\n}\n\nfunction read(json) {\n  var g = new Graph(json.options).setGraph(json.value);\n  _.each(json.nodes, function(entry) {\n    g.setNode(entry.v, entry.value);\n    if (entry.parent) {\n      g.setParent(entry.v, entry.parent);\n    }\n  });\n  _.each(json.edges, function(entry) {\n    g.setEdge({ v: entry.v, w: entry.w, name: entry.name }, entry.value);\n  });\n  return g;\n}\n","/* global window */\n\nvar lodash;\n\nif (typeof require === \"function\") {\n  try {\n    lodash = require(\"lodash\");\n  } catch (e) {}\n}\n\nif (!lodash) {\n  lodash = window._;\n}\n\nmodule.exports = lodash;\n","module.exports = '2.1.5';\n","'use strict';\n\n\nvar yaml = require('./lib/js-yaml.js');\n\n\nmodule.exports = yaml;\n","'use strict';\n\n\nvar loader = require('./js-yaml/loader');\nvar dumper = require('./js-yaml/dumper');\n\n\nfunction deprecated(name) {\n  return function () {\n    throw new Error('Function ' + name + ' is deprecated and cannot be used.');\n  };\n}\n\n\nmodule.exports.Type                = require('./js-yaml/type');\nmodule.exports.Schema              = require('./js-yaml/schema');\nmodule.exports.FAILSAFE_SCHEMA     = require('./js-yaml/schema/failsafe');\nmodule.exports.JSON_SCHEMA         = require('./js-yaml/schema/json');\nmodule.exports.CORE_SCHEMA         = require('./js-yaml/schema/core');\nmodule.exports.DEFAULT_SAFE_SCHEMA = require('./js-yaml/schema/default_safe');\nmodule.exports.DEFAULT_FULL_SCHEMA = require('./js-yaml/schema/default_full');\nmodule.exports.load                = loader.load;\nmodule.exports.loadAll             = loader.loadAll;\nmodule.exports.safeLoad            = loader.safeLoad;\nmodule.exports.safeLoadAll         = loader.safeLoadAll;\nmodule.exports.dump                = dumper.dump;\nmodule.exports.safeDump            = dumper.safeDump;\nmodule.exports.YAMLException       = require('./js-yaml/exception');\n\n// Deprecated schema names from JS-YAML 2.0.x\nmodule.exports.MINIMAL_SCHEMA = require('./js-yaml/schema/failsafe');\nmodule.exports.SAFE_SCHEMA    = require('./js-yaml/schema/default_safe');\nmodule.exports.DEFAULT_SCHEMA = require('./js-yaml/schema/default_full');\n\n// Deprecated functions from JS-YAML 1.x.x\nmodule.exports.scan           = deprecated('scan');\nmodule.exports.parse          = deprecated('parse');\nmodule.exports.compose        = deprecated('compose');\nmodule.exports.addConstructor = deprecated('addConstructor');\n","'use strict';\n\n\nfunction isNothing(subject) {\n  return (typeof subject === 'undefined') || (subject === null);\n}\n\n\nfunction isObject(subject) {\n  return (typeof subject === 'object') && (subject !== null);\n}\n\n\nfunction toArray(sequence) {\n  if (Array.isArray(sequence)) return sequence;\n  else if (isNothing(sequence)) return [];\n\n  return [ sequence ];\n}\n\n\nfunction extend(target, source) {\n  var index, length, key, sourceKeys;\n\n  if (source) {\n    sourceKeys = Object.keys(source);\n\n    for (index = 0, length = sourceKeys.length; index < length; index += 1) {\n      key = sourceKeys[index];\n      target[key] = source[key];\n    }\n  }\n\n  return target;\n}\n\n\nfunction repeat(string, count) {\n  var result = '', cycle;\n\n  for (cycle = 0; cycle < count; cycle += 1) {\n    result += string;\n  }\n\n  return result;\n}\n\n\nfunction isNegativeZero(number) {\n  return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number);\n}\n\n\nmodule.exports.isNothing      = isNothing;\nmodule.exports.isObject       = isObject;\nmodule.exports.toArray        = toArray;\nmodule.exports.repeat         = repeat;\nmodule.exports.isNegativeZero = isNegativeZero;\nmodule.exports.extend         = extend;\n","'use strict';\n\n/*eslint-disable no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\n\nvar _toString       = Object.prototype.toString;\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\nvar CHAR_TAB                  = 0x09; /* Tab */\nvar CHAR_LINE_FEED            = 0x0A; /* LF */\nvar CHAR_SPACE                = 0x20; /* Space */\nvar CHAR_EXCLAMATION          = 0x21; /* ! */\nvar CHAR_DOUBLE_QUOTE         = 0x22; /* \" */\nvar CHAR_SHARP                = 0x23; /* # */\nvar CHAR_PERCENT              = 0x25; /* % */\nvar CHAR_AMPERSAND            = 0x26; /* & */\nvar CHAR_SINGLE_QUOTE         = 0x27; /* ' */\nvar CHAR_ASTERISK             = 0x2A; /* * */\nvar CHAR_COMMA                = 0x2C; /* , */\nvar CHAR_MINUS                = 0x2D; /* - */\nvar CHAR_COLON                = 0x3A; /* : */\nvar CHAR_GREATER_THAN         = 0x3E; /* > */\nvar CHAR_QUESTION             = 0x3F; /* ? */\nvar CHAR_COMMERCIAL_AT        = 0x40; /* @ */\nvar CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */\nvar CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */\nvar CHAR_GRAVE_ACCENT         = 0x60; /* ` */\nvar CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */\nvar CHAR_VERTICAL_LINE        = 0x7C; /* | */\nvar CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */\n\nvar ESCAPE_SEQUENCES = {};\n\nESCAPE_SEQUENCES[0x00]   = '\\\\0';\nESCAPE_SEQUENCES[0x07]   = '\\\\a';\nESCAPE_SEQUENCES[0x08]   = '\\\\b';\nESCAPE_SEQUENCES[0x09]   = '\\\\t';\nESCAPE_SEQUENCES[0x0A]   = '\\\\n';\nESCAPE_SEQUENCES[0x0B]   = '\\\\v';\nESCAPE_SEQUENCES[0x0C]   = '\\\\f';\nESCAPE_SEQUENCES[0x0D]   = '\\\\r';\nESCAPE_SEQUENCES[0x1B]   = '\\\\e';\nESCAPE_SEQUENCES[0x22]   = '\\\\\"';\nESCAPE_SEQUENCES[0x5C]   = '\\\\\\\\';\nESCAPE_SEQUENCES[0x85]   = '\\\\N';\nESCAPE_SEQUENCES[0xA0]   = '\\\\_';\nESCAPE_SEQUENCES[0x2028] = '\\\\L';\nESCAPE_SEQUENCES[0x2029] = '\\\\P';\n\nvar DEPRECATED_BOOLEANS_SYNTAX = [\n  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',\n  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'\n];\n\nfunction compileStyleMap(schema, map) {\n  var result, keys, index, length, tag, style, type;\n\n  if (map === null) return {};\n\n  result = {};\n  keys = Object.keys(map);\n\n  for (index = 0, length = keys.length; index < length; index += 1) {\n    tag = keys[index];\n    style = String(map[tag]);\n\n    if (tag.slice(0, 2) === '!!') {\n      tag = 'tag:yaml.org,2002:' + tag.slice(2);\n    }\n    type = schema.compiledTypeMap['fallback'][tag];\n\n    if (type && _hasOwnProperty.call(type.styleAliases, style)) {\n      style = type.styleAliases[style];\n    }\n\n    result[tag] = style;\n  }\n\n  return result;\n}\n\nfunction encodeHex(character) {\n  var string, handle, length;\n\n  string = character.toString(16).toUpperCase();\n\n  if (character <= 0xFF) {\n    handle = 'x';\n    length = 2;\n  } else if (character <= 0xFFFF) {\n    handle = 'u';\n    length = 4;\n  } else if (character <= 0xFFFFFFFF) {\n    handle = 'U';\n    length = 8;\n  } else {\n    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');\n  }\n\n  return '\\\\' + handle + common.repeat('0', length - string.length) + string;\n}\n\nfunction State(options) {\n  this.schema       = options['schema'] || DEFAULT_FULL_SCHEMA;\n  this.indent       = Math.max(1, (options['indent'] || 2));\n  this.skipInvalid  = options['skipInvalid'] || false;\n  this.flowLevel    = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);\n  this.styleMap     = compileStyleMap(this.schema, options['styles'] || null);\n  this.sortKeys     = options['sortKeys'] || false;\n  this.lineWidth    = options['lineWidth'] || 80;\n  this.noRefs       = options['noRefs'] || false;\n  this.noCompatMode = options['noCompatMode'] || false;\n  this.condenseFlow = options['condenseFlow'] || false;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.explicitTypes = this.schema.compiledExplicit;\n\n  this.tag = null;\n  this.result = '';\n\n  this.duplicates = [];\n  this.usedDuplicates = null;\n}\n\n// Indents every line in a string. Empty lines (\\n only) are not indented.\nfunction indentString(string, spaces) {\n  var ind = common.repeat(' ', spaces),\n      position = 0,\n      next = -1,\n      result = '',\n      line,\n      length = string.length;\n\n  while (position < length) {\n    next = string.indexOf('\\n', position);\n    if (next === -1) {\n      line = string.slice(position);\n      position = length;\n    } else {\n      line = string.slice(position, next + 1);\n      position = next + 1;\n    }\n\n    if (line.length && line !== '\\n') result += ind;\n\n    result += line;\n  }\n\n  return result;\n}\n\nfunction generateNextLine(state, level) {\n  return '\\n' + common.repeat(' ', state.indent * level);\n}\n\nfunction testImplicitResolving(state, str) {\n  var index, length, type;\n\n  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {\n    type = state.implicitTypes[index];\n\n    if (type.resolve(str)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\n// [33] s-white ::= s-space | s-tab\nfunction isWhitespace(c) {\n  return c === CHAR_SPACE || c === CHAR_TAB;\n}\n\n// Returns true if the character can be printed without escaping.\n// From YAML 1.2: \"any allowed characters known to be non-printable\n// should also be escaped. [However,] This isn’t mandatory\"\n// Derived from nb-char - \\t - #x85 - #xA0 - #x2028 - #x2029.\nfunction isPrintable(c) {\n  return  (0x00020 <= c && c <= 0x00007E)\n      || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)\n      || ((0x0E000 <= c && c <= 0x00FFFD) && c !== 0xFEFF /* BOM */)\n      ||  (0x10000 <= c && c <= 0x10FFFF);\n}\n\n// Simplified test for values allowed after the first character in plain style.\nfunction isPlainSafe(c) {\n  // Uses a subset of nb-char - c-flow-indicator - \":\" - \"#\"\n  // where nb-char ::= c-printable - b-char - c-byte-order-mark.\n  return isPrintable(c) && c !== 0xFEFF\n    // - c-flow-indicator\n    && c !== CHAR_COMMA\n    && c !== CHAR_LEFT_SQUARE_BRACKET\n    && c !== CHAR_RIGHT_SQUARE_BRACKET\n    && c !== CHAR_LEFT_CURLY_BRACKET\n    && c !== CHAR_RIGHT_CURLY_BRACKET\n    // - \":\" - \"#\"\n    && c !== CHAR_COLON\n    && c !== CHAR_SHARP;\n}\n\n// Simplified test for values allowed as the first character in plain style.\nfunction isPlainSafeFirst(c) {\n  // Uses a subset of ns-char - c-indicator\n  // where ns-char = nb-char - s-white.\n  return isPrintable(c) && c !== 0xFEFF\n    && !isWhitespace(c) // - s-white\n    // - (c-indicator ::=\n    // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”\n    && c !== CHAR_MINUS\n    && c !== CHAR_QUESTION\n    && c !== CHAR_COLON\n    && c !== CHAR_COMMA\n    && c !== CHAR_LEFT_SQUARE_BRACKET\n    && c !== CHAR_RIGHT_SQUARE_BRACKET\n    && c !== CHAR_LEFT_CURLY_BRACKET\n    && c !== CHAR_RIGHT_CURLY_BRACKET\n    // | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “\"”\n    && c !== CHAR_SHARP\n    && c !== CHAR_AMPERSAND\n    && c !== CHAR_ASTERISK\n    && c !== CHAR_EXCLAMATION\n    && c !== CHAR_VERTICAL_LINE\n    && c !== CHAR_GREATER_THAN\n    && c !== CHAR_SINGLE_QUOTE\n    && c !== CHAR_DOUBLE_QUOTE\n    // | “%” | “@” | “`”)\n    && c !== CHAR_PERCENT\n    && c !== CHAR_COMMERCIAL_AT\n    && c !== CHAR_GRAVE_ACCENT;\n}\n\nvar STYLE_PLAIN   = 1,\n    STYLE_SINGLE  = 2,\n    STYLE_LITERAL = 3,\n    STYLE_FOLDED  = 4,\n    STYLE_DOUBLE  = 5;\n\n// Determines which scalar styles are possible and returns the preferred style.\n// lineWidth = -1 => no limit.\n// Pre-conditions: str.length > 0.\n// Post-conditions:\n//    STYLE_PLAIN or STYLE_SINGLE => no \\n are in the string.\n//    STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).\n//    STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).\nfunction chooseScalarStyle(string, singleLineOnly, indentPerLevel, lineWidth, testAmbiguousType) {\n  var i;\n  var char;\n  var hasLineBreak = false;\n  var hasFoldableLine = false; // only checked if shouldTrackWidth\n  var shouldTrackWidth = lineWidth !== -1;\n  var previousLineBreak = -1; // count the first line correctly\n  var plain = isPlainSafeFirst(string.charCodeAt(0))\n          && !isWhitespace(string.charCodeAt(string.length - 1));\n\n  if (singleLineOnly) {\n    // Case: no block styles.\n    // Check for disallowed characters to rule out plain and single.\n    for (i = 0; i < string.length; i++) {\n      char = string.charCodeAt(i);\n      if (!isPrintable(char)) {\n        return STYLE_DOUBLE;\n      }\n      plain = plain && isPlainSafe(char);\n    }\n  } else {\n    // Case: block styles permitted.\n    for (i = 0; i < string.length; i++) {\n      char = string.charCodeAt(i);\n      if (char === CHAR_LINE_FEED) {\n        hasLineBreak = true;\n        // Check if any line can be folded.\n        if (shouldTrackWidth) {\n          hasFoldableLine = hasFoldableLine ||\n            // Foldable line = too long, and not more-indented.\n            (i - previousLineBreak - 1 > lineWidth &&\n             string[previousLineBreak + 1] !== ' ');\n          previousLineBreak = i;\n        }\n      } else if (!isPrintable(char)) {\n        return STYLE_DOUBLE;\n      }\n      plain = plain && isPlainSafe(char);\n    }\n    // in case the end is missing a \\n\n    hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&\n      (i - previousLineBreak - 1 > lineWidth &&\n       string[previousLineBreak + 1] !== ' '));\n  }\n  // Although every style can represent \\n without escaping, prefer block styles\n  // for multiline, since they're more readable and they don't add empty lines.\n  // Also prefer folding a super-long line.\n  if (!hasLineBreak && !hasFoldableLine) {\n    // Strings interpretable as another type have to be quoted;\n    // e.g. the string 'true' vs. the boolean true.\n    return plain && !testAmbiguousType(string)\n      ? STYLE_PLAIN : STYLE_SINGLE;\n  }\n  // Edge case: block indentation indicator can only have one digit.\n  if (string[0] === ' ' && indentPerLevel > 9) {\n    return STYLE_DOUBLE;\n  }\n  // At this point we know block styles are valid.\n  // Prefer literal style unless we want to fold.\n  return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;\n}\n\n// Note: line breaking/folding is implemented for only the folded style.\n// NB. We drop the last trailing newline (if any) of a returned block scalar\n//  since the dumper adds its own newline. This always works:\n//    • No ending newline => unaffected; already using strip \"-\" chomping.\n//    • Ending newline    => removed then restored.\n//  Importantly, this keeps the \"+\" chomp indicator from gaining an extra line.\nfunction writeScalar(state, string, level, iskey) {\n  state.dump = (function () {\n    if (string.length === 0) {\n      return \"''\";\n    }\n    if (!state.noCompatMode &&\n        DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1) {\n      return \"'\" + string + \"'\";\n    }\n\n    var indent = state.indent * Math.max(1, level); // no 0-indent scalars\n    // As indentation gets deeper, let the width decrease monotonically\n    // to the lower bound min(state.lineWidth, 40).\n    // Note that this implies\n    //  state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.\n    //  state.lineWidth > 40 + state.indent: width decreases until the lower bound.\n    // This behaves better than a constant minimum width which disallows narrower options,\n    // or an indent threshold which causes the width to suddenly increase.\n    var lineWidth = state.lineWidth === -1\n      ? -1 : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);\n\n    // Without knowing if keys are implicit/explicit, assume implicit for safety.\n    var singleLineOnly = iskey\n      // No block styles in flow mode.\n      || (state.flowLevel > -1 && level >= state.flowLevel);\n    function testAmbiguity(string) {\n      return testImplicitResolving(state, string);\n    }\n\n    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth, testAmbiguity)) {\n      case STYLE_PLAIN:\n        return string;\n      case STYLE_SINGLE:\n        return \"'\" + string.replace(/'/g, \"''\") + \"'\";\n      case STYLE_LITERAL:\n        return '|' + blockHeader(string, state.indent)\n          + dropEndingNewline(indentString(string, indent));\n      case STYLE_FOLDED:\n        return '>' + blockHeader(string, state.indent)\n          + dropEndingNewline(indentString(foldString(string, lineWidth), indent));\n      case STYLE_DOUBLE:\n        return '\"' + escapeString(string, lineWidth) + '\"';\n      default:\n        throw new YAMLException('impossible error: invalid scalar style');\n    }\n  }());\n}\n\n// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.\nfunction blockHeader(string, indentPerLevel) {\n  var indentIndicator = (string[0] === ' ') ? String(indentPerLevel) : '';\n\n  // note the special case: the string '\\n' counts as a \"trailing\" empty line.\n  var clip =          string[string.length - 1] === '\\n';\n  var keep = clip && (string[string.length - 2] === '\\n' || string === '\\n');\n  var chomp = keep ? '+' : (clip ? '' : '-');\n\n  return indentIndicator + chomp + '\\n';\n}\n\n// (See the note for writeScalar.)\nfunction dropEndingNewline(string) {\n  return string[string.length - 1] === '\\n' ? string.slice(0, -1) : string;\n}\n\n// Note: a long line without a suitable break point will exceed the width limit.\n// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.\nfunction foldString(string, width) {\n  // In folded style, $k$ consecutive newlines output as $k+1$ newlines—\n  // unless they're before or after a more-indented line, or at the very\n  // beginning or end, in which case $k$ maps to $k$.\n  // Therefore, parse each chunk as newline(s) followed by a content line.\n  var lineRe = /(\\n+)([^\\n]*)/g;\n\n  // first line (possibly an empty line)\n  var result = (function () {\n    var nextLF = string.indexOf('\\n');\n    nextLF = nextLF !== -1 ? nextLF : string.length;\n    lineRe.lastIndex = nextLF;\n    return foldLine(string.slice(0, nextLF), width);\n  }());\n  // If we haven't reached the first content line yet, don't add an extra \\n.\n  var prevMoreIndented = string[0] === '\\n' || string[0] === ' ';\n  var moreIndented;\n\n  // rest of the lines\n  var match;\n  while ((match = lineRe.exec(string))) {\n    var prefix = match[1], line = match[2];\n    moreIndented = (line[0] === ' ');\n    result += prefix\n      + (!prevMoreIndented && !moreIndented && line !== ''\n        ? '\\n' : '')\n      + foldLine(line, width);\n    prevMoreIndented = moreIndented;\n  }\n\n  return result;\n}\n\n// Greedy line breaking.\n// Picks the longest line under the limit each time,\n// otherwise settles for the shortest line over the limit.\n// NB. More-indented lines *cannot* be folded, as that would add an extra \\n.\nfunction foldLine(line, width) {\n  if (line === '' || line[0] === ' ') return line;\n\n  // Since a more-indented line adds a \\n, breaks can't be followed by a space.\n  var breakRe = / [^ ]/g; // note: the match index will always be <= length-2.\n  var match;\n  // start is an inclusive index. end, curr, and next are exclusive.\n  var start = 0, end, curr = 0, next = 0;\n  var result = '';\n\n  // Invariants: 0 <= start <= length-1.\n  //   0 <= curr <= next <= max(0, length-2). curr - start <= width.\n  // Inside the loop:\n  //   A match implies length >= 2, so curr and next are <= length-2.\n  while ((match = breakRe.exec(line))) {\n    next = match.index;\n    // maintain invariant: curr - start <= width\n    if (next - start > width) {\n      end = (curr > start) ? curr : next; // derive end <= length-2\n      result += '\\n' + line.slice(start, end);\n      // skip the space that was output as \\n\n      start = end + 1;                    // derive start <= length-1\n    }\n    curr = next;\n  }\n\n  // By the invariants, start <= length-1, so there is something left over.\n  // It is either the whole string or a part starting from non-whitespace.\n  result += '\\n';\n  // Insert a break if the remainder is too long and there is a break available.\n  if (line.length - start > width && curr > start) {\n    result += line.slice(start, curr) + '\\n' + line.slice(curr + 1);\n  } else {\n    result += line.slice(start);\n  }\n\n  return result.slice(1); // drop extra \\n joiner\n}\n\n// Escapes a double-quoted string.\nfunction escapeString(string) {\n  var result = '';\n  var char, nextChar;\n  var escapeSeq;\n\n  for (var i = 0; i < string.length; i++) {\n    char = string.charCodeAt(i);\n    // Check for surrogate pairs (reference Unicode 3.0 section \"3.7 Surrogates\").\n    if (char >= 0xD800 && char <= 0xDBFF/* high surrogate */) {\n      nextChar = string.charCodeAt(i + 1);\n      if (nextChar >= 0xDC00 && nextChar <= 0xDFFF/* low surrogate */) {\n        // Combine the surrogate pair and store it escaped.\n        result += encodeHex((char - 0xD800) * 0x400 + nextChar - 0xDC00 + 0x10000);\n        // Advance index one extra since we already used that char here.\n        i++; continue;\n      }\n    }\n    escapeSeq = ESCAPE_SEQUENCES[char];\n    result += !escapeSeq && isPrintable(char)\n      ? string[i]\n      : escapeSeq || encodeHex(char);\n  }\n\n  return result;\n}\n\nfunction writeFlowSequence(state, level, object) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level, object[index], false, false)) {\n      if (index !== 0) _result += ',' + (!state.condenseFlow ? ' ' : '');\n      _result += state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = '[' + _result + ']';\n}\n\nfunction writeBlockSequence(state, level, object, compact) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level + 1, object[index], true, true)) {\n      if (!compact || index !== 0) {\n        _result += generateNextLine(state, level);\n      }\n\n      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n        _result += '-';\n      } else {\n        _result += '- ';\n      }\n\n      _result += state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '[]'; // Empty sequence if no valid values.\n}\n\nfunction writeFlowMapping(state, level, object) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      pairBuffer;\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = state.condenseFlow ? '\"' : '';\n\n    if (index !== 0) pairBuffer += ', ';\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level, objectKey, false, false)) {\n      continue; // Skip this pair because of invalid key;\n    }\n\n    if (state.dump.length > 1024) pairBuffer += '? ';\n\n    pairBuffer += state.dump + (state.condenseFlow ? '\"' : '') + ':' + (state.condenseFlow ? '' : ' ');\n\n    if (!writeNode(state, level, objectValue, false, false)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = '{' + _result + '}';\n}\n\nfunction writeBlockMapping(state, level, object, compact) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      explicitPair,\n      pairBuffer;\n\n  // Allow sorting keys so that the output file is deterministic\n  if (state.sortKeys === true) {\n    // Default sorting\n    objectKeyList.sort();\n  } else if (typeof state.sortKeys === 'function') {\n    // Custom sort function\n    objectKeyList.sort(state.sortKeys);\n  } else if (state.sortKeys) {\n    // Something is wrong\n    throw new YAMLException('sortKeys must be a boolean or a function');\n  }\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (!compact || index !== 0) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level + 1, objectKey, true, true, true)) {\n      continue; // Skip this pair because of invalid key.\n    }\n\n    explicitPair = (state.tag !== null && state.tag !== '?') ||\n                   (state.dump && state.dump.length > 1024);\n\n    if (explicitPair) {\n      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n        pairBuffer += '?';\n      } else {\n        pairBuffer += '? ';\n      }\n    }\n\n    pairBuffer += state.dump;\n\n    if (explicitPair) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n      pairBuffer += ':';\n    } else {\n      pairBuffer += ': ';\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '{}'; // Empty mapping if no valid pairs.\n}\n\nfunction detectType(state, object, explicit) {\n  var _result, typeList, index, length, type, style;\n\n  typeList = explicit ? state.explicitTypes : state.implicitTypes;\n\n  for (index = 0, length = typeList.length; index < length; index += 1) {\n    type = typeList[index];\n\n    if ((type.instanceOf  || type.predicate) &&\n        (!type.instanceOf || ((typeof object === 'object') && (object instanceof type.instanceOf))) &&\n        (!type.predicate  || type.predicate(object))) {\n\n      state.tag = explicit ? type.tag : '?';\n\n      if (type.represent) {\n        style = state.styleMap[type.tag] || type.defaultStyle;\n\n        if (_toString.call(type.represent) === '[object Function]') {\n          _result = type.represent(object, style);\n        } else if (_hasOwnProperty.call(type.represent, style)) {\n          _result = type.represent[style](object, style);\n        } else {\n          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not \"' + style + '\" style');\n        }\n\n        state.dump = _result;\n      }\n\n      return true;\n    }\n  }\n\n  return false;\n}\n\n// Serializes `object` and writes it to global `result`.\n// Returns true on success, or false on invalid object.\n//\nfunction writeNode(state, level, object, block, compact, iskey) {\n  state.tag = null;\n  state.dump = object;\n\n  if (!detectType(state, object, false)) {\n    detectType(state, object, true);\n  }\n\n  var type = _toString.call(state.dump);\n\n  if (block) {\n    block = (state.flowLevel < 0 || state.flowLevel > level);\n  }\n\n  var objectOrArray = type === '[object Object]' || type === '[object Array]',\n      duplicateIndex,\n      duplicate;\n\n  if (objectOrArray) {\n    duplicateIndex = state.duplicates.indexOf(object);\n    duplicate = duplicateIndex !== -1;\n  }\n\n  if ((state.tag !== null && state.tag !== '?') || duplicate || (state.indent !== 2 && level > 0)) {\n    compact = false;\n  }\n\n  if (duplicate && state.usedDuplicates[duplicateIndex]) {\n    state.dump = '*ref_' + duplicateIndex;\n  } else {\n    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {\n      state.usedDuplicates[duplicateIndex] = true;\n    }\n    if (type === '[object Object]') {\n      if (block && (Object.keys(state.dump).length !== 0)) {\n        writeBlockMapping(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowMapping(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if (type === '[object Array]') {\n      if (block && (state.dump.length !== 0)) {\n        writeBlockSequence(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowSequence(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if (type === '[object String]') {\n      if (state.tag !== '?') {\n        writeScalar(state, state.dump, level, iskey);\n      }\n    } else {\n      if (state.skipInvalid) return false;\n      throw new YAMLException('unacceptable kind of an object to dump ' + type);\n    }\n\n    if (state.tag !== null && state.tag !== '?') {\n      state.dump = '!<' + state.tag + '> ' + state.dump;\n    }\n  }\n\n  return true;\n}\n\nfunction getDuplicateReferences(object, state) {\n  var objects = [],\n      duplicatesIndexes = [],\n      index,\n      length;\n\n  inspectNode(object, objects, duplicatesIndexes);\n\n  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {\n    state.duplicates.push(objects[duplicatesIndexes[index]]);\n  }\n  state.usedDuplicates = new Array(length);\n}\n\nfunction inspectNode(object, objects, duplicatesIndexes) {\n  var objectKeyList,\n      index,\n      length;\n\n  if (object !== null && typeof object === 'object') {\n    index = objects.indexOf(object);\n    if (index !== -1) {\n      if (duplicatesIndexes.indexOf(index) === -1) {\n        duplicatesIndexes.push(index);\n      }\n    } else {\n      objects.push(object);\n\n      if (Array.isArray(object)) {\n        for (index = 0, length = object.length; index < length; index += 1) {\n          inspectNode(object[index], objects, duplicatesIndexes);\n        }\n      } else {\n        objectKeyList = Object.keys(object);\n\n        for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);\n        }\n      }\n    }\n  }\n}\n\nfunction dump(input, options) {\n  options = options || {};\n\n  var state = new State(options);\n\n  if (!state.noRefs) getDuplicateReferences(input, state);\n\n  if (writeNode(state, 0, input, true, true)) return state.dump + '\\n';\n\n  return '';\n}\n\nfunction safeDump(input, options) {\n  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\nmodule.exports.dump     = dump;\nmodule.exports.safeDump = safeDump;\n","// YAML error class. http://stackoverflow.com/questions/8458984\n//\n'use strict';\n\nfunction YAMLException(reason, mark) {\n  // Super constructor\n  Error.call(this);\n\n  this.name = 'YAMLException';\n  this.reason = reason;\n  this.mark = mark;\n  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');\n\n  // Include stack trace in error object\n  if (Error.captureStackTrace) {\n    // Chrome and NodeJS\n    Error.captureStackTrace(this, this.constructor);\n  } else {\n    // FF, IE 10+ and Safari 6+. Fallback for others\n    this.stack = (new Error()).stack || '';\n  }\n}\n\n\n// Inherit from Error\nYAMLException.prototype = Object.create(Error.prototype);\nYAMLException.prototype.constructor = YAMLException;\n\n\nYAMLException.prototype.toString = function toString(compact) {\n  var result = this.name + ': ';\n\n  result += this.reason || '(unknown reason)';\n\n  if (!compact && this.mark) {\n    result += ' ' + this.mark.toString();\n  }\n\n  return result;\n};\n\n\nmodule.exports = YAMLException;\n","'use strict';\n\n/*eslint-disable max-len,no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar Mark                = require('./mark');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\n\n\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\n\nvar CONTEXT_FLOW_IN   = 1;\nvar CONTEXT_FLOW_OUT  = 2;\nvar CONTEXT_BLOCK_IN  = 3;\nvar CONTEXT_BLOCK_OUT = 4;\n\n\nvar CHOMPING_CLIP  = 1;\nvar CHOMPING_STRIP = 2;\nvar CHOMPING_KEEP  = 3;\n\n\nvar PATTERN_NON_PRINTABLE         = /[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F\\x7F-\\x84\\x86-\\x9F\\uFFFE\\uFFFF]|[\\uD800-\\uDBFF](?![\\uDC00-\\uDFFF])|(?:[^\\uD800-\\uDBFF]|^)[\\uDC00-\\uDFFF]/;\nvar PATTERN_NON_ASCII_LINE_BREAKS = /[\\x85\\u2028\\u2029]/;\nvar PATTERN_FLOW_INDICATORS       = /[,\\[\\]\\{\\}]/;\nvar PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\\-]+!)$/i;\nvar PATTERN_TAG_URI               = /^(?:!|[^,\\[\\]\\{\\}])(?:%[0-9a-f]{2}|[0-9a-z\\-#;\\/\\?:@&=\\+\\$,_\\.!~\\*'\\(\\)\\[\\]])*$/i;\n\n\nfunction is_EOL(c) {\n  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);\n}\n\nfunction is_WHITE_SPACE(c) {\n  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);\n}\n\nfunction is_WS_OR_EOL(c) {\n  return (c === 0x09/* Tab */) ||\n         (c === 0x20/* Space */) ||\n         (c === 0x0A/* LF */) ||\n         (c === 0x0D/* CR */);\n}\n\nfunction is_FLOW_INDICATOR(c) {\n  return c === 0x2C/* , */ ||\n         c === 0x5B/* [ */ ||\n         c === 0x5D/* ] */ ||\n         c === 0x7B/* { */ ||\n         c === 0x7D/* } */;\n}\n\nfunction fromHexCode(c) {\n  var lc;\n\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  /*eslint-disable no-bitwise*/\n  lc = c | 0x20;\n\n  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {\n    return lc - 0x61 + 10;\n  }\n\n  return -1;\n}\n\nfunction escapedHexLen(c) {\n  if (c === 0x78/* x */) { return 2; }\n  if (c === 0x75/* u */) { return 4; }\n  if (c === 0x55/* U */) { return 8; }\n  return 0;\n}\n\nfunction fromDecimalCode(c) {\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  return -1;\n}\n\nfunction simpleEscapeSequence(c) {\n  /* eslint-disable indent */\n  return (c === 0x30/* 0 */) ? '\\x00' :\n        (c === 0x61/* a */) ? '\\x07' :\n        (c === 0x62/* b */) ? '\\x08' :\n        (c === 0x74/* t */) ? '\\x09' :\n        (c === 0x09/* Tab */) ? '\\x09' :\n        (c === 0x6E/* n */) ? '\\x0A' :\n        (c === 0x76/* v */) ? '\\x0B' :\n        (c === 0x66/* f */) ? '\\x0C' :\n        (c === 0x72/* r */) ? '\\x0D' :\n        (c === 0x65/* e */) ? '\\x1B' :\n        (c === 0x20/* Space */) ? ' ' :\n        (c === 0x22/* \" */) ? '\\x22' :\n        (c === 0x2F/* / */) ? '/' :\n        (c === 0x5C/* \\ */) ? '\\x5C' :\n        (c === 0x4E/* N */) ? '\\x85' :\n        (c === 0x5F/* _ */) ? '\\xA0' :\n        (c === 0x4C/* L */) ? '\\u2028' :\n        (c === 0x50/* P */) ? '\\u2029' : '';\n}\n\nfunction charFromCodepoint(c) {\n  if (c <= 0xFFFF) {\n    return String.fromCharCode(c);\n  }\n  // Encode UTF-16 surrogate pair\n  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF\n  return String.fromCharCode(\n    ((c - 0x010000) >> 10) + 0xD800,\n    ((c - 0x010000) & 0x03FF) + 0xDC00\n  );\n}\n\nvar simpleEscapeCheck = new Array(256); // integer, for fast access\nvar simpleEscapeMap = new Array(256);\nfor (var i = 0; i < 256; i++) {\n  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;\n  simpleEscapeMap[i] = simpleEscapeSequence(i);\n}\n\n\nfunction State(input, options) {\n  this.input = input;\n\n  this.filename  = options['filename']  || null;\n  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;\n  this.onWarning = options['onWarning'] || null;\n  this.legacy    = options['legacy']    || false;\n  this.json      = options['json']      || false;\n  this.listener  = options['listener']  || null;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.typeMap       = this.schema.compiledTypeMap;\n\n  this.length     = input.length;\n  this.position   = 0;\n  this.line       = 0;\n  this.lineStart  = 0;\n  this.lineIndent = 0;\n\n  this.documents = [];\n\n  /*\n  this.version;\n  this.checkLineBreaks;\n  this.tagMap;\n  this.anchorMap;\n  this.tag;\n  this.anchor;\n  this.kind;\n  this.result;*/\n\n}\n\n\nfunction generateError(state, message) {\n  return new YAMLException(\n    message,\n    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));\n}\n\nfunction throwError(state, message) {\n  throw generateError(state, message);\n}\n\nfunction throwWarning(state, message) {\n  if (state.onWarning) {\n    state.onWarning.call(null, generateError(state, message));\n  }\n}\n\n\nvar directiveHandlers = {\n\n  YAML: function handleYamlDirective(state, name, args) {\n\n    var match, major, minor;\n\n    if (state.version !== null) {\n      throwError(state, 'duplication of %YAML directive');\n    }\n\n    if (args.length !== 1) {\n      throwError(state, 'YAML directive accepts exactly one argument');\n    }\n\n    match = /^([0-9]+)\\.([0-9]+)$/.exec(args[0]);\n\n    if (match === null) {\n      throwError(state, 'ill-formed argument of the YAML directive');\n    }\n\n    major = parseInt(match[1], 10);\n    minor = parseInt(match[2], 10);\n\n    if (major !== 1) {\n      throwError(state, 'unacceptable YAML version of the document');\n    }\n\n    state.version = args[0];\n    state.checkLineBreaks = (minor < 2);\n\n    if (minor !== 1 && minor !== 2) {\n      throwWarning(state, 'unsupported YAML version of the document');\n    }\n  },\n\n  TAG: function handleTagDirective(state, name, args) {\n\n    var handle, prefix;\n\n    if (args.length !== 2) {\n      throwError(state, 'TAG directive accepts exactly two arguments');\n    }\n\n    handle = args[0];\n    prefix = args[1];\n\n    if (!PATTERN_TAG_HANDLE.test(handle)) {\n      throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');\n    }\n\n    if (_hasOwnProperty.call(state.tagMap, handle)) {\n      throwError(state, 'there is a previously declared suffix for \"' + handle + '\" tag handle');\n    }\n\n    if (!PATTERN_TAG_URI.test(prefix)) {\n      throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');\n    }\n\n    state.tagMap[handle] = prefix;\n  }\n};\n\n\nfunction captureSegment(state, start, end, checkJson) {\n  var _position, _length, _character, _result;\n\n  if (start < end) {\n    _result = state.input.slice(start, end);\n\n    if (checkJson) {\n      for (_position = 0, _length = _result.length; _position < _length; _position += 1) {\n        _character = _result.charCodeAt(_position);\n        if (!(_character === 0x09 ||\n              (0x20 <= _character && _character <= 0x10FFFF))) {\n          throwError(state, 'expected valid JSON character');\n        }\n      }\n    } else if (PATTERN_NON_PRINTABLE.test(_result)) {\n      throwError(state, 'the stream contains non-printable characters');\n    }\n\n    state.result += _result;\n  }\n}\n\nfunction mergeMappings(state, destination, source, overridableKeys) {\n  var sourceKeys, key, index, quantity;\n\n  if (!common.isObject(source)) {\n    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');\n  }\n\n  sourceKeys = Object.keys(source);\n\n  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {\n    key = sourceKeys[index];\n\n    if (!_hasOwnProperty.call(destination, key)) {\n      destination[key] = source[key];\n      overridableKeys[key] = true;\n    }\n  }\n}\n\nfunction storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, startLine, startPos) {\n  var index, quantity;\n\n  keyNode = String(keyNode);\n\n  if (_result === null) {\n    _result = {};\n  }\n\n  if (keyTag === 'tag:yaml.org,2002:merge') {\n    if (Array.isArray(valueNode)) {\n      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {\n        mergeMappings(state, _result, valueNode[index], overridableKeys);\n      }\n    } else {\n      mergeMappings(state, _result, valueNode, overridableKeys);\n    }\n  } else {\n    if (!state.json &&\n        !_hasOwnProperty.call(overridableKeys, keyNode) &&\n        _hasOwnProperty.call(_result, keyNode)) {\n      state.line = startLine || state.line;\n      state.position = startPos || state.position;\n      throwError(state, 'duplicated mapping key');\n    }\n    _result[keyNode] = valueNode;\n    delete overridableKeys[keyNode];\n  }\n\n  return _result;\n}\n\nfunction readLineBreak(state) {\n  var ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x0A/* LF */) {\n    state.position++;\n  } else if (ch === 0x0D/* CR */) {\n    state.position++;\n    if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {\n      state.position++;\n    }\n  } else {\n    throwError(state, 'a line break is expected');\n  }\n\n  state.line += 1;\n  state.lineStart = state.position;\n}\n\nfunction skipSeparationSpace(state, allowComments, checkIndent) {\n  var lineBreaks = 0,\n      ch = state.input.charCodeAt(state.position);\n\n  while (ch !== 0) {\n    while (is_WHITE_SPACE(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (allowComments && ch === 0x23/* # */) {\n      do {\n        ch = state.input.charCodeAt(++state.position);\n      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);\n    }\n\n    if (is_EOL(ch)) {\n      readLineBreak(state);\n\n      ch = state.input.charCodeAt(state.position);\n      lineBreaks++;\n      state.lineIndent = 0;\n\n      while (ch === 0x20/* Space */) {\n        state.lineIndent++;\n        ch = state.input.charCodeAt(++state.position);\n      }\n    } else {\n      break;\n    }\n  }\n\n  if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {\n    throwWarning(state, 'deficient indentation');\n  }\n\n  return lineBreaks;\n}\n\nfunction testDocumentSeparator(state) {\n  var _position = state.position,\n      ch;\n\n  ch = state.input.charCodeAt(_position);\n\n  // Condition state.position === state.lineStart is tested\n  // in parent on each call, for efficiency. No needs to test here again.\n  if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&\n      ch === state.input.charCodeAt(_position + 1) &&\n      ch === state.input.charCodeAt(_position + 2)) {\n\n    _position += 3;\n\n    ch = state.input.charCodeAt(_position);\n\n    if (ch === 0 || is_WS_OR_EOL(ch)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction writeFoldedLines(state, count) {\n  if (count === 1) {\n    state.result += ' ';\n  } else if (count > 1) {\n    state.result += common.repeat('\\n', count - 1);\n  }\n}\n\n\nfunction readPlainScalar(state, nodeIndent, withinFlowCollection) {\n  var preceding,\n      following,\n      captureStart,\n      captureEnd,\n      hasPendingContent,\n      _line,\n      _lineStart,\n      _lineIndent,\n      _kind = state.kind,\n      _result = state.result,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (is_WS_OR_EOL(ch)      ||\n      is_FLOW_INDICATOR(ch) ||\n      ch === 0x23/* # */    ||\n      ch === 0x26/* & */    ||\n      ch === 0x2A/* * */    ||\n      ch === 0x21/* ! */    ||\n      ch === 0x7C/* | */    ||\n      ch === 0x3E/* > */    ||\n      ch === 0x27/* ' */    ||\n      ch === 0x22/* \" */    ||\n      ch === 0x25/* % */    ||\n      ch === 0x40/* @ */    ||\n      ch === 0x60/* ` */) {\n    return false;\n  }\n\n  if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (is_WS_OR_EOL(following) ||\n        withinFlowCollection && is_FLOW_INDICATOR(following)) {\n      return false;\n    }\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  captureStart = captureEnd = state.position;\n  hasPendingContent = false;\n\n  while (ch !== 0) {\n    if (ch === 0x3A/* : */) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following) ||\n          withinFlowCollection && is_FLOW_INDICATOR(following)) {\n        break;\n      }\n\n    } else if (ch === 0x23/* # */) {\n      preceding = state.input.charCodeAt(state.position - 1);\n\n      if (is_WS_OR_EOL(preceding)) {\n        break;\n      }\n\n    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||\n               withinFlowCollection && is_FLOW_INDICATOR(ch)) {\n      break;\n\n    } else if (is_EOL(ch)) {\n      _line = state.line;\n      _lineStart = state.lineStart;\n      _lineIndent = state.lineIndent;\n      skipSeparationSpace(state, false, -1);\n\n      if (state.lineIndent >= nodeIndent) {\n        hasPendingContent = true;\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      } else {\n        state.position = captureEnd;\n        state.line = _line;\n        state.lineStart = _lineStart;\n        state.lineIndent = _lineIndent;\n        break;\n      }\n    }\n\n    if (hasPendingContent) {\n      captureSegment(state, captureStart, captureEnd, false);\n      writeFoldedLines(state, state.line - _line);\n      captureStart = captureEnd = state.position;\n      hasPendingContent = false;\n    }\n\n    if (!is_WHITE_SPACE(ch)) {\n      captureEnd = state.position + 1;\n    }\n\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  captureSegment(state, captureStart, captureEnd, false);\n\n  if (state.result) {\n    return true;\n  }\n\n  state.kind = _kind;\n  state.result = _result;\n  return false;\n}\n\nfunction readSingleQuotedScalar(state, nodeIndent) {\n  var ch,\n      captureStart, captureEnd;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch !== 0x27/* ' */) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while ((ch = state.input.charCodeAt(state.position)) !== 0) {\n    if (ch === 0x27/* ' */) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (ch === 0x27/* ' */) {\n        captureStart = state.position;\n        state.position++;\n        captureEnd = state.position;\n      } else {\n        return true;\n      }\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a single quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a single quoted scalar');\n}\n\nfunction readDoubleQuotedScalar(state, nodeIndent) {\n  var captureStart,\n      captureEnd,\n      hexLength,\n      hexResult,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch !== 0x22/* \" */) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while ((ch = state.input.charCodeAt(state.position)) !== 0) {\n    if (ch === 0x22/* \" */) {\n      captureSegment(state, captureStart, state.position, true);\n      state.position++;\n      return true;\n\n    } else if (ch === 0x5C/* \\ */) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (is_EOL(ch)) {\n        skipSeparationSpace(state, false, nodeIndent);\n\n        // TODO: rework to inline fn with no type cast?\n      } else if (ch < 256 && simpleEscapeCheck[ch]) {\n        state.result += simpleEscapeMap[ch];\n        state.position++;\n\n      } else if ((tmp = escapedHexLen(ch)) > 0) {\n        hexLength = tmp;\n        hexResult = 0;\n\n        for (; hexLength > 0; hexLength--) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if ((tmp = fromHexCode(ch)) >= 0) {\n            hexResult = (hexResult << 4) + tmp;\n\n          } else {\n            throwError(state, 'expected hexadecimal character');\n          }\n        }\n\n        state.result += charFromCodepoint(hexResult);\n\n        state.position++;\n\n      } else {\n        throwError(state, 'unknown escape sequence');\n      }\n\n      captureStart = captureEnd = state.position;\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a double quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a double quoted scalar');\n}\n\nfunction readFlowCollection(state, nodeIndent) {\n  var readNext = true,\n      _line,\n      _tag     = state.tag,\n      _result,\n      _anchor  = state.anchor,\n      following,\n      terminator,\n      isPair,\n      isExplicitPair,\n      isMapping,\n      overridableKeys = {},\n      keyNode,\n      keyTag,\n      valueNode,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x5B/* [ */) {\n    terminator = 0x5D;/* ] */\n    isMapping = false;\n    _result = [];\n  } else if (ch === 0x7B/* { */) {\n    terminator = 0x7D;/* } */\n    isMapping = true;\n    _result = {};\n  } else {\n    return false;\n  }\n\n  if (state.anchor !== null) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  while (ch !== 0) {\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (ch === terminator) {\n      state.position++;\n      state.tag = _tag;\n      state.anchor = _anchor;\n      state.kind = isMapping ? 'mapping' : 'sequence';\n      state.result = _result;\n      return true;\n    } else if (!readNext) {\n      throwError(state, 'missed comma between flow collection entries');\n    }\n\n    keyTag = keyNode = valueNode = null;\n    isPair = isExplicitPair = false;\n\n    if (ch === 0x3F/* ? */) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following)) {\n        isPair = isExplicitPair = true;\n        state.position++;\n        skipSeparationSpace(state, true, nodeIndent);\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n    keyTag = state.tag;\n    keyNode = state.result;\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {\n      isPair = true;\n      ch = state.input.charCodeAt(++state.position);\n      skipSeparationSpace(state, true, nodeIndent);\n      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n      valueNode = state.result;\n    }\n\n    if (isMapping) {\n      storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);\n    } else if (isPair) {\n      _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode));\n    } else {\n      _result.push(keyNode);\n    }\n\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (ch === 0x2C/* , */) {\n      readNext = true;\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      readNext = false;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a flow collection');\n}\n\nfunction readBlockScalar(state, nodeIndent) {\n  var captureStart,\n      folding,\n      chomping       = CHOMPING_CLIP,\n      didReadContent = false,\n      detectedIndent = false,\n      textIndent     = nodeIndent,\n      emptyLines     = 0,\n      atMoreIndented = false,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x7C/* | */) {\n    folding = false;\n  } else if (ch === 0x3E/* > */) {\n    folding = true;\n  } else {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n\n  while (ch !== 0) {\n    ch = state.input.charCodeAt(++state.position);\n\n    if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {\n      if (CHOMPING_CLIP === chomping) {\n        chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;\n      } else {\n        throwError(state, 'repeat of a chomping mode identifier');\n      }\n\n    } else if ((tmp = fromDecimalCode(ch)) >= 0) {\n      if (tmp === 0) {\n        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');\n      } else if (!detectedIndent) {\n        textIndent = nodeIndent + tmp - 1;\n        detectedIndent = true;\n      } else {\n        throwError(state, 'repeat of an indentation width identifier');\n      }\n\n    } else {\n      break;\n    }\n  }\n\n  if (is_WHITE_SPACE(ch)) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (is_WHITE_SPACE(ch));\n\n    if (ch === 0x23/* # */) {\n      do { ch = state.input.charCodeAt(++state.position); }\n      while (!is_EOL(ch) && (ch !== 0));\n    }\n  }\n\n  while (ch !== 0) {\n    readLineBreak(state);\n    state.lineIndent = 0;\n\n    ch = state.input.charCodeAt(state.position);\n\n    while ((!detectedIndent || state.lineIndent < textIndent) &&\n           (ch === 0x20/* Space */)) {\n      state.lineIndent++;\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (!detectedIndent && state.lineIndent > textIndent) {\n      textIndent = state.lineIndent;\n    }\n\n    if (is_EOL(ch)) {\n      emptyLines++;\n      continue;\n    }\n\n    // End of the scalar.\n    if (state.lineIndent < textIndent) {\n\n      // Perform the chomping.\n      if (chomping === CHOMPING_KEEP) {\n        state.result += common.repeat('\\n', didReadContent ? 1 + emptyLines : emptyLines);\n      } else if (chomping === CHOMPING_CLIP) {\n        if (didReadContent) { // i.e. only if the scalar is not empty.\n          state.result += '\\n';\n        }\n      }\n\n      // Break this `while` cycle and go to the funciton's epilogue.\n      break;\n    }\n\n    // Folded style: use fancy rules to handle line breaks.\n    if (folding) {\n\n      // Lines starting with white space characters (more-indented lines) are not folded.\n      if (is_WHITE_SPACE(ch)) {\n        atMoreIndented = true;\n        // except for the first content line (cf. Example 8.1)\n        state.result += common.repeat('\\n', didReadContent ? 1 + emptyLines : emptyLines);\n\n      // End of more-indented block.\n      } else if (atMoreIndented) {\n        atMoreIndented = false;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // Just one line break - perceive as the same line.\n      } else if (emptyLines === 0) {\n        if (didReadContent) { // i.e. only if we have already read some scalar content.\n          state.result += ' ';\n        }\n\n      // Several line breaks - perceive as different lines.\n      } else {\n        state.result += common.repeat('\\n', emptyLines);\n      }\n\n    // Literal style: just add exact number of line breaks between content lines.\n    } else {\n      // Keep all line breaks except the header line break.\n      state.result += common.repeat('\\n', didReadContent ? 1 + emptyLines : emptyLines);\n    }\n\n    didReadContent = true;\n    detectedIndent = true;\n    emptyLines = 0;\n    captureStart = state.position;\n\n    while (!is_EOL(ch) && (ch !== 0)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    captureSegment(state, captureStart, state.position, false);\n  }\n\n  return true;\n}\n\nfunction readBlockSequence(state, nodeIndent) {\n  var _line,\n      _tag      = state.tag,\n      _anchor   = state.anchor,\n      _result   = [],\n      following,\n      detected  = false,\n      ch;\n\n  if (state.anchor !== null) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (ch !== 0) {\n\n    if (ch !== 0x2D/* - */) {\n      break;\n    }\n\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (!is_WS_OR_EOL(following)) {\n      break;\n    }\n\n    detected = true;\n    state.position++;\n\n    if (skipSeparationSpace(state, true, -1)) {\n      if (state.lineIndent <= nodeIndent) {\n        _result.push(null);\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);\n    _result.push(state.result);\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {\n      throwError(state, 'bad indentation of a sequence entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'sequence';\n    state.result = _result;\n    return true;\n  }\n  return false;\n}\n\nfunction readBlockMapping(state, nodeIndent, flowIndent) {\n  var following,\n      allowCompact,\n      _line,\n      _pos,\n      _tag          = state.tag,\n      _anchor       = state.anchor,\n      _result       = {},\n      overridableKeys = {},\n      keyTag        = null,\n      keyNode       = null,\n      valueNode     = null,\n      atExplicitKey = false,\n      detected      = false,\n      ch;\n\n  if (state.anchor !== null) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (ch !== 0) {\n    following = state.input.charCodeAt(state.position + 1);\n    _line = state.line; // Save the current line.\n    _pos = state.position;\n\n    //\n    // Explicit notation case. There are two separate blocks:\n    // first for the key (denoted by \"?\") and second for the value (denoted by \":\")\n    //\n    if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {\n\n      if (ch === 0x3F/* ? */) {\n        if (atExplicitKey) {\n          storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);\n          keyTag = keyNode = valueNode = null;\n        }\n\n        detected = true;\n        atExplicitKey = true;\n        allowCompact = true;\n\n      } else if (atExplicitKey) {\n        // i.e. 0x3A/* : */ === character after the explicit key.\n        atExplicitKey = false;\n        allowCompact = true;\n\n      } else {\n        throwError(state, 'incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line');\n      }\n\n      state.position += 1;\n      ch = following;\n\n    //\n    // Implicit notation case. Flow-style node as the key first, then \":\", and the value.\n    //\n    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {\n\n      if (state.line === _line) {\n        ch = state.input.charCodeAt(state.position);\n\n        while (is_WHITE_SPACE(ch)) {\n          ch = state.input.charCodeAt(++state.position);\n        }\n\n        if (ch === 0x3A/* : */) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if (!is_WS_OR_EOL(ch)) {\n            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');\n          }\n\n          if (atExplicitKey) {\n            storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);\n            keyTag = keyNode = valueNode = null;\n          }\n\n          detected = true;\n          atExplicitKey = false;\n          allowCompact = false;\n          keyTag = state.tag;\n          keyNode = state.result;\n\n        } else if (detected) {\n          throwError(state, 'can not read an implicit mapping pair; a colon is missed');\n\n        } else {\n          state.tag = _tag;\n          state.anchor = _anchor;\n          return true; // Keep the result of `composeNode`.\n        }\n\n      } else if (detected) {\n        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');\n\n      } else {\n        state.tag = _tag;\n        state.anchor = _anchor;\n        return true; // Keep the result of `composeNode`.\n      }\n\n    } else {\n      break; // Reading is done. Go to the epilogue.\n    }\n\n    //\n    // Common reading code for both explicit and implicit notations.\n    //\n    if (state.line === _line || state.lineIndent > nodeIndent) {\n      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {\n        if (atExplicitKey) {\n          keyNode = state.result;\n        } else {\n          valueNode = state.result;\n        }\n      }\n\n      if (!atExplicitKey) {\n        storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, _line, _pos);\n        keyTag = keyNode = valueNode = null;\n      }\n\n      skipSeparationSpace(state, true, -1);\n      ch = state.input.charCodeAt(state.position);\n    }\n\n    if (state.lineIndent > nodeIndent && (ch !== 0)) {\n      throwError(state, 'bad indentation of a mapping entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  //\n  // Epilogue.\n  //\n\n  // Special case: last mapping's node contains only the key in explicit notation.\n  if (atExplicitKey) {\n    storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);\n  }\n\n  // Expose the resulting mapping.\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'mapping';\n    state.result = _result;\n  }\n\n  return detected;\n}\n\nfunction readTagProperty(state) {\n  var _position,\n      isVerbatim = false,\n      isNamed    = false,\n      tagHandle,\n      tagName,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch !== 0x21/* ! */) return false;\n\n  if (state.tag !== null) {\n    throwError(state, 'duplication of a tag property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  if (ch === 0x3C/* < */) {\n    isVerbatim = true;\n    ch = state.input.charCodeAt(++state.position);\n\n  } else if (ch === 0x21/* ! */) {\n    isNamed = true;\n    tagHandle = '!!';\n    ch = state.input.charCodeAt(++state.position);\n\n  } else {\n    tagHandle = '!';\n  }\n\n  _position = state.position;\n\n  if (isVerbatim) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (ch !== 0 && ch !== 0x3E/* > */);\n\n    if (state.position < state.length) {\n      tagName = state.input.slice(_position, state.position);\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      throwError(state, 'unexpected end of the stream within a verbatim tag');\n    }\n  } else {\n    while (ch !== 0 && !is_WS_OR_EOL(ch)) {\n\n      if (ch === 0x21/* ! */) {\n        if (!isNamed) {\n          tagHandle = state.input.slice(_position - 1, state.position + 1);\n\n          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {\n            throwError(state, 'named tag handle cannot contain such characters');\n          }\n\n          isNamed = true;\n          _position = state.position + 1;\n        } else {\n          throwError(state, 'tag suffix cannot contain exclamation marks');\n        }\n      }\n\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    tagName = state.input.slice(_position, state.position);\n\n    if (PATTERN_FLOW_INDICATORS.test(tagName)) {\n      throwError(state, 'tag suffix cannot contain flow indicator characters');\n    }\n  }\n\n  if (tagName && !PATTERN_TAG_URI.test(tagName)) {\n    throwError(state, 'tag name cannot contain such characters: ' + tagName);\n  }\n\n  if (isVerbatim) {\n    state.tag = tagName;\n\n  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {\n    state.tag = state.tagMap[tagHandle] + tagName;\n\n  } else if (tagHandle === '!') {\n    state.tag = '!' + tagName;\n\n  } else if (tagHandle === '!!') {\n    state.tag = 'tag:yaml.org,2002:' + tagName;\n\n  } else {\n    throwError(state, 'undeclared tag handle \"' + tagHandle + '\"');\n  }\n\n  return true;\n}\n\nfunction readAnchorProperty(state) {\n  var _position,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch !== 0x26/* & */) return false;\n\n  if (state.anchor !== null) {\n    throwError(state, 'duplication of an anchor property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an anchor node must contain at least one character');\n  }\n\n  state.anchor = state.input.slice(_position, state.position);\n  return true;\n}\n\nfunction readAlias(state) {\n  var _position, alias,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch !== 0x2A/* * */) return false;\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an alias node must contain at least one character');\n  }\n\n  alias = state.input.slice(_position, state.position);\n\n  if (!state.anchorMap.hasOwnProperty(alias)) {\n    throwError(state, 'unidentified alias \"' + alias + '\"');\n  }\n\n  state.result = state.anchorMap[alias];\n  skipSeparationSpace(state, true, -1);\n  return true;\n}\n\nfunction composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {\n  var allowBlockStyles,\n      allowBlockScalars,\n      allowBlockCollections,\n      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent\n      atNewLine  = false,\n      hasContent = false,\n      typeIndex,\n      typeQuantity,\n      type,\n      flowIndent,\n      blockIndent;\n\n  if (state.listener !== null) {\n    state.listener('open', state);\n  }\n\n  state.tag    = null;\n  state.anchor = null;\n  state.kind   = null;\n  state.result = null;\n\n  allowBlockStyles = allowBlockScalars = allowBlockCollections =\n    CONTEXT_BLOCK_OUT === nodeContext ||\n    CONTEXT_BLOCK_IN  === nodeContext;\n\n  if (allowToSeek) {\n    if (skipSeparationSpace(state, true, -1)) {\n      atNewLine = true;\n\n      if (state.lineIndent > parentIndent) {\n        indentStatus = 1;\n      } else if (state.lineIndent === parentIndent) {\n        indentStatus = 0;\n      } else if (state.lineIndent < parentIndent) {\n        indentStatus = -1;\n      }\n    }\n  }\n\n  if (indentStatus === 1) {\n    while (readTagProperty(state) || readAnchorProperty(state)) {\n      if (skipSeparationSpace(state, true, -1)) {\n        atNewLine = true;\n        allowBlockCollections = allowBlockStyles;\n\n        if (state.lineIndent > parentIndent) {\n          indentStatus = 1;\n        } else if (state.lineIndent === parentIndent) {\n          indentStatus = 0;\n        } else if (state.lineIndent < parentIndent) {\n          indentStatus = -1;\n        }\n      } else {\n        allowBlockCollections = false;\n      }\n    }\n  }\n\n  if (allowBlockCollections) {\n    allowBlockCollections = atNewLine || allowCompact;\n  }\n\n  if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {\n    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {\n      flowIndent = parentIndent;\n    } else {\n      flowIndent = parentIndent + 1;\n    }\n\n    blockIndent = state.position - state.lineStart;\n\n    if (indentStatus === 1) {\n      if (allowBlockCollections &&\n          (readBlockSequence(state, blockIndent) ||\n           readBlockMapping(state, blockIndent, flowIndent)) ||\n          readFlowCollection(state, flowIndent)) {\n        hasContent = true;\n      } else {\n        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||\n            readSingleQuotedScalar(state, flowIndent) ||\n            readDoubleQuotedScalar(state, flowIndent)) {\n          hasContent = true;\n\n        } else if (readAlias(state)) {\n          hasContent = true;\n\n          if (state.tag !== null || state.anchor !== null) {\n            throwError(state, 'alias node should not have any properties');\n          }\n\n        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {\n          hasContent = true;\n\n          if (state.tag === null) {\n            state.tag = '?';\n          }\n        }\n\n        if (state.anchor !== null) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else if (indentStatus === 0) {\n      // Special case: block sequences are allowed to have same indentation level as the parent.\n      // http://www.yaml.org/spec/1.2/spec.html#id2799784\n      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);\n    }\n  }\n\n  if (state.tag !== null && state.tag !== '!') {\n    if (state.tag === '?') {\n      for (typeIndex = 0, typeQuantity = state.implicitTypes.length; typeIndex < typeQuantity; typeIndex += 1) {\n        type = state.implicitTypes[typeIndex];\n\n        // Implicit resolving is not allowed for non-scalar types, and '?'\n        // non-specific tag is only assigned to plain scalars. So, it isn't\n        // needed to check for 'kind' conformity.\n\n        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched\n          state.result = type.construct(state.result);\n          state.tag = type.tag;\n          if (state.anchor !== null) {\n            state.anchorMap[state.anchor] = state.result;\n          }\n          break;\n        }\n      }\n    } else if (_hasOwnProperty.call(state.typeMap[state.kind || 'fallback'], state.tag)) {\n      type = state.typeMap[state.kind || 'fallback'][state.tag];\n\n      if (state.result !== null && type.kind !== state.kind) {\n        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be \"' + type.kind + '\", not \"' + state.kind + '\"');\n      }\n\n      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched\n        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');\n      } else {\n        state.result = type.construct(state.result);\n        if (state.anchor !== null) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else {\n      throwError(state, 'unknown tag !<' + state.tag + '>');\n    }\n  }\n\n  if (state.listener !== null) {\n    state.listener('close', state);\n  }\n  return state.tag !== null ||  state.anchor !== null || hasContent;\n}\n\nfunction readDocument(state) {\n  var documentStart = state.position,\n      _position,\n      directiveName,\n      directiveArgs,\n      hasDirectives = false,\n      ch;\n\n  state.version = null;\n  state.checkLineBreaks = state.legacy;\n  state.tagMap = {};\n  state.anchorMap = {};\n\n  while ((ch = state.input.charCodeAt(state.position)) !== 0) {\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (state.lineIndent > 0 || ch !== 0x25/* % */) {\n      break;\n    }\n\n    hasDirectives = true;\n    ch = state.input.charCodeAt(++state.position);\n    _position = state.position;\n\n    while (ch !== 0 && !is_WS_OR_EOL(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    directiveName = state.input.slice(_position, state.position);\n    directiveArgs = [];\n\n    if (directiveName.length < 1) {\n      throwError(state, 'directive name must not be less than one character in length');\n    }\n\n    while (ch !== 0) {\n      while (is_WHITE_SPACE(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      if (ch === 0x23/* # */) {\n        do { ch = state.input.charCodeAt(++state.position); }\n        while (ch !== 0 && !is_EOL(ch));\n        break;\n      }\n\n      if (is_EOL(ch)) break;\n\n      _position = state.position;\n\n      while (ch !== 0 && !is_WS_OR_EOL(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      directiveArgs.push(state.input.slice(_position, state.position));\n    }\n\n    if (ch !== 0) readLineBreak(state);\n\n    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {\n      directiveHandlers[directiveName](state, directiveName, directiveArgs);\n    } else {\n      throwWarning(state, 'unknown document directive \"' + directiveName + '\"');\n    }\n  }\n\n  skipSeparationSpace(state, true, -1);\n\n  if (state.lineIndent === 0 &&\n      state.input.charCodeAt(state.position)     === 0x2D/* - */ &&\n      state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&\n      state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {\n    state.position += 3;\n    skipSeparationSpace(state, true, -1);\n\n  } else if (hasDirectives) {\n    throwError(state, 'directives end mark is expected');\n  }\n\n  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);\n  skipSeparationSpace(state, true, -1);\n\n  if (state.checkLineBreaks &&\n      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {\n    throwWarning(state, 'non-ASCII line breaks are interpreted as content');\n  }\n\n  state.documents.push(state.result);\n\n  if (state.position === state.lineStart && testDocumentSeparator(state)) {\n\n    if (state.input.charCodeAt(state.position) === 0x2E/* . */) {\n      state.position += 3;\n      skipSeparationSpace(state, true, -1);\n    }\n    return;\n  }\n\n  if (state.position < (state.length - 1)) {\n    throwError(state, 'end of the stream or a document separator is expected');\n  } else {\n    return;\n  }\n}\n\n\nfunction loadDocuments(input, options) {\n  input = String(input);\n  options = options || {};\n\n  if (input.length !== 0) {\n\n    // Add tailing `\\n` if not exists\n    if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&\n        input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {\n      input += '\\n';\n    }\n\n    // Strip BOM\n    if (input.charCodeAt(0) === 0xFEFF) {\n      input = input.slice(1);\n    }\n  }\n\n  var state = new State(input, options);\n\n  // Use 0 as string terminator. That significantly simplifies bounds check.\n  state.input += '\\0';\n\n  while (state.input.charCodeAt(state.position) === 0x20/* Space */) {\n    state.lineIndent += 1;\n    state.position += 1;\n  }\n\n  while (state.position < (state.length - 1)) {\n    readDocument(state);\n  }\n\n  return state.documents;\n}\n\n\nfunction loadAll(input, iterator, options) {\n  var documents = loadDocuments(input, options), index, length;\n\n  if (typeof iterator !== 'function') {\n    return documents;\n  }\n\n  for (index = 0, length = documents.length; index < length; index += 1) {\n    iterator(documents[index]);\n  }\n}\n\n\nfunction load(input, options) {\n  var documents = loadDocuments(input, options);\n\n  if (documents.length === 0) {\n    /*eslint-disable no-undefined*/\n    return undefined;\n  } else if (documents.length === 1) {\n    return documents[0];\n  }\n  throw new YAMLException('expected a single document in the stream, but found more');\n}\n\n\nfunction safeLoadAll(input, output, options) {\n  if (typeof output === 'function') {\n    loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n  } else {\n    return loadAll(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n  }\n}\n\n\nfunction safeLoad(input, options) {\n  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nmodule.exports.loadAll     = loadAll;\nmodule.exports.load        = load;\nmodule.exports.safeLoadAll = safeLoadAll;\nmodule.exports.safeLoad    = safeLoad;\n","'use strict';\n\n\nvar common = require('./common');\n\n\nfunction Mark(name, buffer, position, line, column) {\n  this.name     = name;\n  this.buffer   = buffer;\n  this.position = position;\n  this.line     = line;\n  this.column   = column;\n}\n\n\nMark.prototype.getSnippet = function getSnippet(indent, maxLength) {\n  var head, start, tail, end, snippet;\n\n  if (!this.buffer) return null;\n\n  indent = indent || 4;\n  maxLength = maxLength || 75;\n\n  head = '';\n  start = this.position;\n\n  while (start > 0 && '\\x00\\r\\n\\x85\\u2028\\u2029'.indexOf(this.buffer.charAt(start - 1)) === -1) {\n    start -= 1;\n    if (this.position - start > (maxLength / 2 - 1)) {\n      head = ' ... ';\n      start += 5;\n      break;\n    }\n  }\n\n  tail = '';\n  end = this.position;\n\n  while (end < this.buffer.length && '\\x00\\r\\n\\x85\\u2028\\u2029'.indexOf(this.buffer.charAt(end)) === -1) {\n    end += 1;\n    if (end - this.position > (maxLength / 2 - 1)) {\n      tail = ' ... ';\n      end -= 5;\n      break;\n    }\n  }\n\n  snippet = this.buffer.slice(start, end);\n\n  return common.repeat(' ', indent) + head + snippet + tail + '\\n' +\n         common.repeat(' ', indent + this.position - start + head.length) + '^';\n};\n\n\nMark.prototype.toString = function toString(compact) {\n  var snippet, where = '';\n\n  if (this.name) {\n    where += 'in \"' + this.name + '\" ';\n  }\n\n  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);\n\n  if (!compact) {\n    snippet = this.getSnippet();\n\n    if (snippet) {\n      where += ':\\n' + snippet;\n    }\n  }\n\n  return where;\n};\n\n\nmodule.exports = Mark;\n","'use strict';\n\n/*eslint-disable max-len*/\n\nvar common        = require('./common');\nvar YAMLException = require('./exception');\nvar Type          = require('./type');\n\n\nfunction compileList(schema, name, result) {\n  var exclude = [];\n\n  schema.include.forEach(function (includedSchema) {\n    result = compileList(includedSchema, name, result);\n  });\n\n  schema[name].forEach(function (currentType) {\n    result.forEach(function (previousType, previousIndex) {\n      if (previousType.tag === currentType.tag && previousType.kind === currentType.kind) {\n        exclude.push(previousIndex);\n      }\n    });\n\n    result.push(currentType);\n  });\n\n  return result.filter(function (type, index) {\n    return exclude.indexOf(index) === -1;\n  });\n}\n\n\nfunction compileMap(/* lists... */) {\n  var result = {\n        scalar: {},\n        sequence: {},\n        mapping: {},\n        fallback: {}\n      }, index, length;\n\n  function collectType(type) {\n    result[type.kind][type.tag] = result['fallback'][type.tag] = type;\n  }\n\n  for (index = 0, length = arguments.length; index < length; index += 1) {\n    arguments[index].forEach(collectType);\n  }\n  return result;\n}\n\n\nfunction Schema(definition) {\n  this.include  = definition.include  || [];\n  this.implicit = definition.implicit || [];\n  this.explicit = definition.explicit || [];\n\n  this.implicit.forEach(function (type) {\n    if (type.loadKind && type.loadKind !== 'scalar') {\n      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');\n    }\n  });\n\n  this.compiledImplicit = compileList(this, 'implicit', []);\n  this.compiledExplicit = compileList(this, 'explicit', []);\n  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);\n}\n\n\nSchema.DEFAULT = null;\n\n\nSchema.create = function createSchema() {\n  var schemas, types;\n\n  switch (arguments.length) {\n    case 1:\n      schemas = Schema.DEFAULT;\n      types = arguments[0];\n      break;\n\n    case 2:\n      schemas = arguments[0];\n      types = arguments[1];\n      break;\n\n    default:\n      throw new YAMLException('Wrong number of arguments for Schema.create function');\n  }\n\n  schemas = common.toArray(schemas);\n  types = common.toArray(types);\n\n  if (!schemas.every(function (schema) { return schema instanceof Schema; })) {\n    throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');\n  }\n\n  if (!types.every(function (type) { return type instanceof Type; })) {\n    throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');\n  }\n\n  return new Schema({\n    include: schemas,\n    explicit: types\n  });\n};\n\n\nmodule.exports = Schema;\n","// Standard YAML's Core schema.\n// http://www.yaml.org/spec/1.2/spec.html#id2804923\n//\n// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.\n// So, Core schema has no distinctions from JSON schema is JS-YAML.\n\n\n'use strict';\n\n\nvar Schema = require('../schema');\n\n\nmodule.exports = new Schema({\n  include: [\n    require('./json')\n  ]\n});\n","// JS-YAML's default schema for `load` function.\n// It is not described in the YAML specification.\n//\n// This schema is based on JS-YAML's default safe schema and includes\n// JavaScript-specific types: !!js/undefined, !!js/regexp and !!js/function.\n//\n// Also this schema is used as default base schema at `Schema.create` function.\n\n\n'use strict';\n\n\nvar Schema = require('../schema');\n\n\nmodule.exports = Schema.DEFAULT = new Schema({\n  include: [\n    require('./default_safe')\n  ],\n  explicit: [\n    require('../type/js/undefined'),\n    require('../type/js/regexp'),\n    require('../type/js/function')\n  ]\n});\n","// JS-YAML's default schema for `safeLoad` function.\n// It is not described in the YAML specification.\n//\n// This schema is based on standard YAML's Core schema and includes most of\n// extra types described at YAML tag repository. (http://yaml.org/type/)\n\n\n'use strict';\n\n\nvar Schema = require('../schema');\n\n\nmodule.exports = new Schema({\n  include: [\n    require('./core')\n  ],\n  implicit: [\n    require('../type/timestamp'),\n    require('../type/merge')\n  ],\n  explicit: [\n    require('../type/binary'),\n    require('../type/omap'),\n    require('../type/pairs'),\n    require('../type/set')\n  ]\n});\n","// Standard YAML's Failsafe schema.\n// http://www.yaml.org/spec/1.2/spec.html#id2802346\n\n\n'use strict';\n\n\nvar Schema = require('../schema');\n\n\nmodule.exports = new Schema({\n  explicit: [\n    require('../type/str'),\n    require('../type/seq'),\n    require('../type/map')\n  ]\n});\n","// Standard YAML's JSON schema.\n// http://www.yaml.org/spec/1.2/spec.html#id2803231\n//\n// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.\n// So, this schema is not such strict as defined in the YAML specification.\n// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.\n\n\n'use strict';\n\n\nvar Schema = require('../schema');\n\n\nmodule.exports = new Schema({\n  include: [\n    require('./failsafe')\n  ],\n  implicit: [\n    require('../type/null'),\n    require('../type/bool'),\n    require('../type/int'),\n    require('../type/float')\n  ]\n});\n","'use strict';\n\nvar YAMLException = require('./exception');\n\nvar TYPE_CONSTRUCTOR_OPTIONS = [\n  'kind',\n  'resolve',\n  'construct',\n  'instanceOf',\n  'predicate',\n  'represent',\n  'defaultStyle',\n  'styleAliases'\n];\n\nvar YAML_NODE_KINDS = [\n  'scalar',\n  'sequence',\n  'mapping'\n];\n\nfunction compileStyleAliases(map) {\n  var result = {};\n\n  if (map !== null) {\n    Object.keys(map).forEach(function (style) {\n      map[style].forEach(function (alias) {\n        result[String(alias)] = style;\n      });\n    });\n  }\n\n  return result;\n}\n\nfunction Type(tag, options) {\n  options = options || {};\n\n  Object.keys(options).forEach(function (name) {\n    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {\n      throw new YAMLException('Unknown option \"' + name + '\" is met in definition of \"' + tag + '\" YAML type.');\n    }\n  });\n\n  // TODO: Add tag format check.\n  this.tag          = tag;\n  this.kind         = options['kind']         || null;\n  this.resolve      = options['resolve']      || function () { return true; };\n  this.construct    = options['construct']    || function (data) { return data; };\n  this.instanceOf   = options['instanceOf']   || null;\n  this.predicate    = options['predicate']    || null;\n  this.represent    = options['represent']    || null;\n  this.defaultStyle = options['defaultStyle'] || null;\n  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);\n\n  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {\n    throw new YAMLException('Unknown kind \"' + this.kind + '\" is specified for \"' + tag + '\" YAML type.');\n  }\n}\n\nmodule.exports = Type;\n","'use strict';\n\n/*eslint-disable no-bitwise*/\n\nvar NodeBuffer;\n\ntry {\n  // A trick for browserified version, to not include `Buffer` shim\n  var _require = require;\n  NodeBuffer = _require('buffer').Buffer;\n} catch (__) {}\n\nvar Type       = require('../type');\n\n\n// [ 64, 65, 66 ] -> [ padding, CR, LF ]\nvar BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\\n\\r';\n\n\nfunction resolveYamlBinary(data) {\n  if (data === null) return false;\n\n  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;\n\n  // Convert one by one.\n  for (idx = 0; idx < max; idx++) {\n    code = map.indexOf(data.charAt(idx));\n\n    // Skip CR/LF\n    if (code > 64) continue;\n\n    // Fail on illegal characters\n    if (code < 0) return false;\n\n    bitlen += 6;\n  }\n\n  // If there are any bits left, source was corrupted\n  return (bitlen % 8) === 0;\n}\n\nfunction constructYamlBinary(data) {\n  var idx, tailbits,\n      input = data.replace(/[\\r\\n=]/g, ''), // remove CR/LF & padding to simplify scan\n      max = input.length,\n      map = BASE64_MAP,\n      bits = 0,\n      result = [];\n\n  // Collect by 6*4 bits (3 bytes)\n\n  for (idx = 0; idx < max; idx++) {\n    if ((idx % 4 === 0) && idx) {\n      result.push((bits >> 16) & 0xFF);\n      result.push((bits >> 8) & 0xFF);\n      result.push(bits & 0xFF);\n    }\n\n    bits = (bits << 6) | map.indexOf(input.charAt(idx));\n  }\n\n  // Dump tail\n\n  tailbits = (max % 4) * 6;\n\n  if (tailbits === 0) {\n    result.push((bits >> 16) & 0xFF);\n    result.push((bits >> 8) & 0xFF);\n    result.push(bits & 0xFF);\n  } else if (tailbits === 18) {\n    result.push((bits >> 10) & 0xFF);\n    result.push((bits >> 2) & 0xFF);\n  } else if (tailbits === 12) {\n    result.push((bits >> 4) & 0xFF);\n  }\n\n  // Wrap into Buffer for NodeJS and leave Array for browser\n  if (NodeBuffer) {\n    // Support node 6.+ Buffer API when available\n    return NodeBuffer.from ? NodeBuffer.from(result) : new NodeBuffer(result);\n  }\n\n  return result;\n}\n\nfunction representYamlBinary(object /*, style*/) {\n  var result = '', bits = 0, idx, tail,\n      max = object.length,\n      map = BASE64_MAP;\n\n  // Convert every three bytes to 4 ASCII characters.\n\n  for (idx = 0; idx < max; idx++) {\n    if ((idx % 3 === 0) && idx) {\n      result += map[(bits >> 18) & 0x3F];\n      result += map[(bits >> 12) & 0x3F];\n      result += map[(bits >> 6) & 0x3F];\n      result += map[bits & 0x3F];\n    }\n\n    bits = (bits << 8) + object[idx];\n  }\n\n  // Dump tail\n\n  tail = max % 3;\n\n  if (tail === 0) {\n    result += map[(bits >> 18) & 0x3F];\n    result += map[(bits >> 12) & 0x3F];\n    result += map[(bits >> 6) & 0x3F];\n    result += map[bits & 0x3F];\n  } else if (tail === 2) {\n    result += map[(bits >> 10) & 0x3F];\n    result += map[(bits >> 4) & 0x3F];\n    result += map[(bits << 2) & 0x3F];\n    result += map[64];\n  } else if (tail === 1) {\n    result += map[(bits >> 2) & 0x3F];\n    result += map[(bits << 4) & 0x3F];\n    result += map[64];\n    result += map[64];\n  }\n\n  return result;\n}\n\nfunction isBinary(object) {\n  return NodeBuffer && NodeBuffer.isBuffer(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:binary', {\n  kind: 'scalar',\n  resolve: resolveYamlBinary,\n  construct: constructYamlBinary,\n  predicate: isBinary,\n  represent: representYamlBinary\n});\n","'use strict';\n\nvar Type = require('../type');\n\nfunction resolveYamlBoolean(data) {\n  if (data === null) return false;\n\n  var max = data.length;\n\n  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||\n         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));\n}\n\nfunction constructYamlBoolean(data) {\n  return data === 'true' ||\n         data === 'True' ||\n         data === 'TRUE';\n}\n\nfunction isBoolean(object) {\n  return Object.prototype.toString.call(object) === '[object Boolean]';\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:bool', {\n  kind: 'scalar',\n  resolve: resolveYamlBoolean,\n  construct: constructYamlBoolean,\n  predicate: isBoolean,\n  represent: {\n    lowercase: function (object) { return object ? 'true' : 'false'; },\n    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },\n    camelcase: function (object) { return object ? 'True' : 'False'; }\n  },\n  defaultStyle: 'lowercase'\n});\n","'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nvar YAML_FLOAT_PATTERN = new RegExp(\n  // 2.5e4, 2.5 and integers\n  '^(?:[-+]?(?:0|[1-9][0-9_]*)(?:\\\\.[0-9_]*)?(?:[eE][-+]?[0-9]+)?' +\n  // .2e4, .2\n  // special case, seems not from spec\n  '|\\\\.[0-9_]+(?:[eE][-+]?[0-9]+)?' +\n  // 20:59\n  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\\\.[0-9_]*' +\n  // .inf\n  '|[-+]?\\\\.(?:inf|Inf|INF)' +\n  // .nan\n  '|\\\\.(?:nan|NaN|NAN))$');\n\nfunction resolveYamlFloat(data) {\n  if (data === null) return false;\n\n  if (!YAML_FLOAT_PATTERN.test(data) ||\n      // Quick hack to not allow integers end with `_`\n      // Probably should update regexp & check speed\n      data[data.length - 1] === '_') {\n    return false;\n  }\n\n  return true;\n}\n\nfunction constructYamlFloat(data) {\n  var value, sign, base, digits;\n\n  value  = data.replace(/_/g, '').toLowerCase();\n  sign   = value[0] === '-' ? -1 : 1;\n  digits = [];\n\n  if ('+-'.indexOf(value[0]) >= 0) {\n    value = value.slice(1);\n  }\n\n  if (value === '.inf') {\n    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;\n\n  } else if (value === '.nan') {\n    return NaN;\n\n  } else if (value.indexOf(':') >= 0) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseFloat(v, 10));\n    });\n\n    value = 0.0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += d * base;\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n  return sign * parseFloat(value, 10);\n}\n\n\nvar SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;\n\nfunction representYamlFloat(object, style) {\n  var res;\n\n  if (isNaN(object)) {\n    switch (style) {\n      case 'lowercase': return '.nan';\n      case 'uppercase': return '.NAN';\n      case 'camelcase': return '.NaN';\n    }\n  } else if (Number.POSITIVE_INFINITY === object) {\n    switch (style) {\n      case 'lowercase': return '.inf';\n      case 'uppercase': return '.INF';\n      case 'camelcase': return '.Inf';\n    }\n  } else if (Number.NEGATIVE_INFINITY === object) {\n    switch (style) {\n      case 'lowercase': return '-.inf';\n      case 'uppercase': return '-.INF';\n      case 'camelcase': return '-.Inf';\n    }\n  } else if (common.isNegativeZero(object)) {\n    return '-0.0';\n  }\n\n  res = object.toString(10);\n\n  // JS stringifier can build scientific format without dots: 5e-100,\n  // while YAML requres dot: 5.e-100. Fix it with simple hack\n\n  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;\n}\n\nfunction isFloat(object) {\n  return (Object.prototype.toString.call(object) === '[object Number]') &&\n         (object % 1 !== 0 || common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:float', {\n  kind: 'scalar',\n  resolve: resolveYamlFloat,\n  construct: constructYamlFloat,\n  predicate: isFloat,\n  represent: representYamlFloat,\n  defaultStyle: 'lowercase'\n});\n","'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nfunction isHexCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||\n         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||\n         ((0x61/* a */ <= c) && (c <= 0x66/* f */));\n}\n\nfunction isOctCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));\n}\n\nfunction isDecCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));\n}\n\nfunction resolveYamlInteger(data) {\n  if (data === null) return false;\n\n  var max = data.length,\n      index = 0,\n      hasDigits = false,\n      ch;\n\n  if (!max) return false;\n\n  ch = data[index];\n\n  // sign\n  if (ch === '-' || ch === '+') {\n    ch = data[++index];\n  }\n\n  if (ch === '0') {\n    // 0\n    if (index + 1 === max) return true;\n    ch = data[++index];\n\n    // base 2, base 8, base 16\n\n    if (ch === 'b') {\n      // base 2\n      index++;\n\n      for (; index < max; index++) {\n        ch = data[index];\n        if (ch === '_') continue;\n        if (ch !== '0' && ch !== '1') return false;\n        hasDigits = true;\n      }\n      return hasDigits && ch !== '_';\n    }\n\n\n    if (ch === 'x') {\n      // base 16\n      index++;\n\n      for (; index < max; index++) {\n        ch = data[index];\n        if (ch === '_') continue;\n        if (!isHexCode(data.charCodeAt(index))) return false;\n        hasDigits = true;\n      }\n      return hasDigits && ch !== '_';\n    }\n\n    // base 8\n    for (; index < max; index++) {\n      ch = data[index];\n      if (ch === '_') continue;\n      if (!isOctCode(data.charCodeAt(index))) return false;\n      hasDigits = true;\n    }\n    return hasDigits && ch !== '_';\n  }\n\n  // base 10 (except 0) or base 60\n\n  // value should not start with `_`;\n  if (ch === '_') return false;\n\n  for (; index < max; index++) {\n    ch = data[index];\n    if (ch === '_') continue;\n    if (ch === ':') break;\n    if (!isDecCode(data.charCodeAt(index))) {\n      return false;\n    }\n    hasDigits = true;\n  }\n\n  // Should have digits and should not end with `_`\n  if (!hasDigits || ch === '_') return false;\n\n  // if !base60 - done;\n  if (ch !== ':') return true;\n\n  // base60 almost not used, no needs to optimize\n  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));\n}\n\nfunction constructYamlInteger(data) {\n  var value = data, sign = 1, ch, base, digits = [];\n\n  if (value.indexOf('_') !== -1) {\n    value = value.replace(/_/g, '');\n  }\n\n  ch = value[0];\n\n  if (ch === '-' || ch === '+') {\n    if (ch === '-') sign = -1;\n    value = value.slice(1);\n    ch = value[0];\n  }\n\n  if (value === '0') return 0;\n\n  if (ch === '0') {\n    if (value[1] === 'b') return sign * parseInt(value.slice(2), 2);\n    if (value[1] === 'x') return sign * parseInt(value, 16);\n    return sign * parseInt(value, 8);\n  }\n\n  if (value.indexOf(':') !== -1) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseInt(v, 10));\n    });\n\n    value = 0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += (d * base);\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n\n  return sign * parseInt(value, 10);\n}\n\nfunction isInteger(object) {\n  return (Object.prototype.toString.call(object)) === '[object Number]' &&\n         (object % 1 === 0 && !common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:int', {\n  kind: 'scalar',\n  resolve: resolveYamlInteger,\n  construct: constructYamlInteger,\n  predicate: isInteger,\n  represent: {\n    binary:      function (object) { return '0b' + object.toString(2); },\n    octal:       function (object) { return '0'  + object.toString(8); },\n    decimal:     function (object) { return        object.toString(10); },\n    hexadecimal: function (object) { return '0x' + object.toString(16).toUpperCase(); }\n  },\n  defaultStyle: 'decimal',\n  styleAliases: {\n    binary:      [ 2,  'bin' ],\n    octal:       [ 8,  'oct' ],\n    decimal:     [ 10, 'dec' ],\n    hexadecimal: [ 16, 'hex' ]\n  }\n});\n","'use strict';\n\nvar esprima;\n\n// Browserified version does not have esprima\n//\n// 1. For node.js just require module as deps\n// 2. For browser try to require mudule via external AMD system.\n//    If not found - try to fallback to window.esprima. If not\n//    found too - then fail to parse.\n//\ntry {\n  // workaround to exclude package from browserify list.\n  var _require = require;\n  esprima = _require('esprima');\n} catch (_) {\n  /*global window */\n  if (typeof window !== 'undefined') esprima = window.esprima;\n}\n\nvar Type = require('../../type');\n\nfunction resolveJavascriptFunction(data) {\n  if (data === null) return false;\n\n  try {\n    var source = '(' + data + ')',\n        ast    = esprima.parse(source, { range: true });\n\n    if (ast.type                    !== 'Program'             ||\n        ast.body.length             !== 1                     ||\n        ast.body[0].type            !== 'ExpressionStatement' ||\n        ast.body[0].expression.type !== 'FunctionExpression') {\n      return false;\n    }\n\n    return true;\n  } catch (err) {\n    return false;\n  }\n}\n\nfunction constructJavascriptFunction(data) {\n  /*jslint evil:true*/\n\n  var source = '(' + data + ')',\n      ast    = esprima.parse(source, { range: true }),\n      params = [],\n      body;\n\n  if (ast.type                    !== 'Program'             ||\n      ast.body.length             !== 1                     ||\n      ast.body[0].type            !== 'ExpressionStatement' ||\n      ast.body[0].expression.type !== 'FunctionExpression') {\n    throw new Error('Failed to resolve function');\n  }\n\n  ast.body[0].expression.params.forEach(function (param) {\n    params.push(param.name);\n  });\n\n  body = ast.body[0].expression.body.range;\n\n  // Esprima's ranges include the first '{' and the last '}' characters on\n  // function expressions. So cut them out.\n  /*eslint-disable no-new-func*/\n  return new Function(params, source.slice(body[0] + 1, body[1] - 1));\n}\n\nfunction representJavascriptFunction(object /*, style*/) {\n  return object.toString();\n}\n\nfunction isFunction(object) {\n  return Object.prototype.toString.call(object) === '[object Function]';\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:js/function', {\n  kind: 'scalar',\n  resolve: resolveJavascriptFunction,\n  construct: constructJavascriptFunction,\n  predicate: isFunction,\n  represent: representJavascriptFunction\n});\n","'use strict';\n\nvar Type = require('../../type');\n\nfunction resolveJavascriptRegExp(data) {\n  if (data === null) return false;\n  if (data.length === 0) return false;\n\n  var regexp = data,\n      tail   = /\\/([gim]*)$/.exec(data),\n      modifiers = '';\n\n  // if regexp starts with '/' it can have modifiers and must be properly closed\n  // `/foo/gim` - modifiers tail can be maximum 3 chars\n  if (regexp[0] === '/') {\n    if (tail) modifiers = tail[1];\n\n    if (modifiers.length > 3) return false;\n    // if expression starts with /, is should be properly terminated\n    if (regexp[regexp.length - modifiers.length - 1] !== '/') return false;\n  }\n\n  return true;\n}\n\nfunction constructJavascriptRegExp(data) {\n  var regexp = data,\n      tail   = /\\/([gim]*)$/.exec(data),\n      modifiers = '';\n\n  // `/foo/gim` - tail can be maximum 4 chars\n  if (regexp[0] === '/') {\n    if (tail) modifiers = tail[1];\n    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);\n  }\n\n  return new RegExp(regexp, modifiers);\n}\n\nfunction representJavascriptRegExp(object /*, style*/) {\n  var result = '/' + object.source + '/';\n\n  if (object.global) result += 'g';\n  if (object.multiline) result += 'm';\n  if (object.ignoreCase) result += 'i';\n\n  return result;\n}\n\nfunction isRegExp(object) {\n  return Object.prototype.toString.call(object) === '[object RegExp]';\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:js/regexp', {\n  kind: 'scalar',\n  resolve: resolveJavascriptRegExp,\n  construct: constructJavascriptRegExp,\n  predicate: isRegExp,\n  represent: representJavascriptRegExp\n});\n","'use strict';\n\nvar Type = require('../../type');\n\nfunction resolveJavascriptUndefined() {\n  return true;\n}\n\nfunction constructJavascriptUndefined() {\n  /*eslint-disable no-undefined*/\n  return undefined;\n}\n\nfunction representJavascriptUndefined() {\n  return '';\n}\n\nfunction isUndefined(object) {\n  return typeof object === 'undefined';\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:js/undefined', {\n  kind: 'scalar',\n  resolve: resolveJavascriptUndefined,\n  construct: constructJavascriptUndefined,\n  predicate: isUndefined,\n  represent: representJavascriptUndefined\n});\n","'use strict';\n\nvar Type = require('../type');\n\nmodule.exports = new Type('tag:yaml.org,2002:map', {\n  kind: 'mapping',\n  construct: function (data) { return data !== null ? data : {}; }\n});\n","'use strict';\n\nvar Type = require('../type');\n\nfunction resolveYamlMerge(data) {\n  return data === '<<' || data === null;\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:merge', {\n  kind: 'scalar',\n  resolve: resolveYamlMerge\n});\n","'use strict';\n\nvar Type = require('../type');\n\nfunction resolveYamlNull(data) {\n  if (data === null) return true;\n\n  var max = data.length;\n\n  return (max === 1 && data === '~') ||\n         (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'));\n}\n\nfunction constructYamlNull() {\n  return null;\n}\n\nfunction isNull(object) {\n  return object === null;\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:null', {\n  kind: 'scalar',\n  resolve: resolveYamlNull,\n  construct: constructYamlNull,\n  predicate: isNull,\n  represent: {\n    canonical: function () { return '~';    },\n    lowercase: function () { return 'null'; },\n    uppercase: function () { return 'NULL'; },\n    camelcase: function () { return 'Null'; }\n  },\n  defaultStyle: 'lowercase'\n});\n","'use strict';\n\nvar Type = require('../type');\n\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\nvar _toString       = Object.prototype.toString;\n\nfunction resolveYamlOmap(data) {\n  if (data === null) return true;\n\n  var objectKeys = [], index, length, pair, pairKey, pairHasKey,\n      object = data;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    pair = object[index];\n    pairHasKey = false;\n\n    if (_toString.call(pair) !== '[object Object]') return false;\n\n    for (pairKey in pair) {\n      if (_hasOwnProperty.call(pair, pairKey)) {\n        if (!pairHasKey) pairHasKey = true;\n        else return false;\n      }\n    }\n\n    if (!pairHasKey) return false;\n\n    if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey);\n    else return false;\n  }\n\n  return true;\n}\n\nfunction constructYamlOmap(data) {\n  return data !== null ? data : [];\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:omap', {\n  kind: 'sequence',\n  resolve: resolveYamlOmap,\n  construct: constructYamlOmap\n});\n","'use strict';\n\nvar Type = require('../type');\n\nvar _toString = Object.prototype.toString;\n\nfunction resolveYamlPairs(data) {\n  if (data === null) return true;\n\n  var index, length, pair, keys, result,\n      object = data;\n\n  result = new Array(object.length);\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    pair = object[index];\n\n    if (_toString.call(pair) !== '[object Object]') return false;\n\n    keys = Object.keys(pair);\n\n    if (keys.length !== 1) return false;\n\n    result[index] = [ keys[0], pair[keys[0]] ];\n  }\n\n  return true;\n}\n\nfunction constructYamlPairs(data) {\n  if (data === null) return [];\n\n  var index, length, pair, keys, result,\n      object = data;\n\n  result = new Array(object.length);\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    pair = object[index];\n\n    keys = Object.keys(pair);\n\n    result[index] = [ keys[0], pair[keys[0]] ];\n  }\n\n  return result;\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:pairs', {\n  kind: 'sequence',\n  resolve: resolveYamlPairs,\n  construct: constructYamlPairs\n});\n","'use strict';\n\nvar Type = require('../type');\n\nmodule.exports = new Type('tag:yaml.org,2002:seq', {\n  kind: 'sequence',\n  construct: function (data) { return data !== null ? data : []; }\n});\n","'use strict';\n\nvar Type = require('../type');\n\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction resolveYamlSet(data) {\n  if (data === null) return true;\n\n  var key, object = data;\n\n  for (key in object) {\n    if (_hasOwnProperty.call(object, key)) {\n      if (object[key] !== null) return false;\n    }\n  }\n\n  return true;\n}\n\nfunction constructYamlSet(data) {\n  return data !== null ? data : {};\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:set', {\n  kind: 'mapping',\n  resolve: resolveYamlSet,\n  construct: constructYamlSet\n});\n","'use strict';\n\nvar Type = require('../type');\n\nmodule.exports = new Type('tag:yaml.org,2002:str', {\n  kind: 'scalar',\n  construct: function (data) { return data !== null ? data : ''; }\n});\n","'use strict';\n\nvar Type = require('../type');\n\nvar YAML_DATE_REGEXP = new RegExp(\n  '^([0-9][0-9][0-9][0-9])'          + // [1] year\n  '-([0-9][0-9])'                    + // [2] month\n  '-([0-9][0-9])$');                   // [3] day\n\nvar YAML_TIMESTAMP_REGEXP = new RegExp(\n  '^([0-9][0-9][0-9][0-9])'          + // [1] year\n  '-([0-9][0-9]?)'                   + // [2] month\n  '-([0-9][0-9]?)'                   + // [3] day\n  '(?:[Tt]|[ \\\\t]+)'                 + // ...\n  '([0-9][0-9]?)'                    + // [4] hour\n  ':([0-9][0-9])'                    + // [5] minute\n  ':([0-9][0-9])'                    + // [6] second\n  '(?:\\\\.([0-9]*))?'                 + // [7] fraction\n  '(?:[ \\\\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour\n  '(?::([0-9][0-9]))?))?$');           // [11] tz_minute\n\nfunction resolveYamlTimestamp(data) {\n  if (data === null) return false;\n  if (YAML_DATE_REGEXP.exec(data) !== null) return true;\n  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;\n  return false;\n}\n\nfunction constructYamlTimestamp(data) {\n  var match, year, month, day, hour, minute, second, fraction = 0,\n      delta = null, tz_hour, tz_minute, date;\n\n  match = YAML_DATE_REGEXP.exec(data);\n  if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);\n\n  if (match === null) throw new Error('Date resolve error');\n\n  // match: [1] year [2] month [3] day\n\n  year = +(match[1]);\n  month = +(match[2]) - 1; // JS month starts with 0\n  day = +(match[3]);\n\n  if (!match[4]) { // no hour\n    return new Date(Date.UTC(year, month, day));\n  }\n\n  // match: [4] hour [5] minute [6] second [7] fraction\n\n  hour = +(match[4]);\n  minute = +(match[5]);\n  second = +(match[6]);\n\n  if (match[7]) {\n    fraction = match[7].slice(0, 3);\n    while (fraction.length < 3) { // milli-seconds\n      fraction += '0';\n    }\n    fraction = +fraction;\n  }\n\n  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute\n\n  if (match[9]) {\n    tz_hour = +(match[10]);\n    tz_minute = +(match[11] || 0);\n    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds\n    if (match[9] === '-') delta = -delta;\n  }\n\n  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));\n\n  if (delta) date.setTime(date.getTime() - delta);\n\n  return date;\n}\n\nfunction representYamlTimestamp(object /*, style*/) {\n  return object.toISOString();\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:timestamp', {\n  kind: 'scalar',\n  resolve: resolveYamlTimestamp,\n  construct: constructYamlTimestamp,\n  instanceOf: Date,\n  represent: representYamlTimestamp\n});\n","/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2014 Jeremy Whitlock\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n'use strict';\n\n/**\n * Various utilities for JSON References *(http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03)* and\n * JSON Pointers *(https://tools.ietf.org/html/rfc6901)*.\n *\n * @module JsonRefs\n */\n\nvar _ = require('lodash');\nvar gl = require('graphlib');\nvar path = require('path');\nvar PathLoader = require('path-loader');\nvar qs = require('querystring');\nvar slash = require('slash');\nvar URI = require('uri-js');\n\nvar badPtrTokenRegex = /~(?:[^01]|$)/g;\nvar remoteCache = {};\nvar remoteTypes = ['relative', 'remote'];\nvar remoteUriTypes = ['absolute', 'uri'];\nvar uriDetailsCache = {};\n\n// Load promises polyfill if necessary\n/* istanbul ignore if */\nif (typeof Promise === 'undefined') {\n  require('native-promise-only');\n}\n\n/* Internal Functions */\n\nfunction combineQueryParams (qs1, qs2) {\n  var combined = {};\n\n  function mergeQueryParams (obj) {\n    _.forOwn(obj, function (val, key) {\n      combined[key] = val;\n    });\n  }\n\n  mergeQueryParams(qs.parse(qs1 || ''));\n  mergeQueryParams(qs.parse(qs2 || ''));\n\n  return Object.keys(combined).length === 0 ? undefined : qs.stringify(combined);\n}\n\nfunction combineURIs (u1, u2) {\n  // Convert Windows paths\n  if (_.isString(u1)) {\n    u1 = slash(u1);\n  }\n\n  if (_.isString(u2)) {\n    u2 = slash(u2);\n  }\n\n  var u2Details = parseURI(_.isUndefined(u2) ? '' : u2);\n  var u1Details;\n  var combinedDetails;\n\n  if (remoteUriTypes.indexOf(u2Details.reference) > -1) {\n    combinedDetails = u2Details;\n  } else {\n    u1Details = _.isUndefined(u1) ? undefined : parseURI(u1);\n\n    if (!_.isUndefined(u1Details)) {\n      combinedDetails = u1Details;\n\n      // Join the paths\n      combinedDetails.path = slash(path.join(u1Details.path, u2Details.path));\n\n      // Join query parameters\n      combinedDetails.query = combineQueryParams(u1Details.query, u2Details.query);\n    } else {\n      combinedDetails = u2Details;\n    }\n  }\n\n  // Remove the fragment\n  combinedDetails.fragment = undefined;\n\n  // For relative URIs, add back the '..' since it was removed above\n  return (remoteUriTypes.indexOf(combinedDetails.reference) === -1 &&\n          combinedDetails.path.indexOf('../') === 0 ? '../' : '') + URI.serialize(combinedDetails);\n}\n\nfunction findAncestors (obj, path) {\n  var ancestors = [];\n  var node;\n\n  if (path.length > 0) {\n    node = obj;\n\n    path.slice(0, path.length - 1).forEach(function (seg) {\n      if (seg in node) {\n        node = node[seg];\n\n        ancestors.push(node);\n      }\n    });\n  }\n\n  return ancestors;\n}\n\nfunction isRemote (refDetails) {\n  return remoteTypes.indexOf(getRefType(refDetails)) > -1;\n}\n\nfunction isValid (refDetails) {\n  return _.isUndefined(refDetails.error) && refDetails.type !== 'invalid';\n}\n\nfunction findValue (obj, path) {\n  var value = obj;\n\n  // Using this manual approach instead of _.get since we have to decodeURI the segments\n  path.forEach(function (seg) {\n    seg = decodeURI(seg);\n\n    if (seg in value) {\n      value = value[seg];\n    } else {\n      throw Error('JSON Pointer points to missing location: ' + pathToPtr(path));\n    }\n  });\n\n  return value;\n}\n\nfunction getExtraRefKeys (ref) {\n  return Object.keys(ref).filter(function (key) {\n    return key !== '$ref';\n  });\n}\n\nfunction getRefType (refDetails) {\n  var type;\n\n  // Convert the URI reference to one of our types\n  switch (refDetails.uriDetails.reference) {\n  case 'absolute':\n  case 'uri':\n    type = 'remote';\n    break;\n  case 'same-document':\n    type = 'local';\n    break;\n  default:\n    type = refDetails.uriDetails.reference;\n  }\n\n  return type;\n}\n\nfunction getRemoteDocument (url, options) {\n  var cacheEntry = remoteCache[url];\n  var allTasks = Promise.resolve();\n  var loaderOptions = _.cloneDeep(options.loaderOptions || {});\n\n  if (_.isUndefined(cacheEntry)) {\n    // If there is no content processor, default to processing the raw response as JSON\n    if (_.isUndefined(loaderOptions.processContent)) {\n      loaderOptions.processContent = function (res, callback) {\n        callback(undefined, JSON.parse(res.text));\n      };\n    }\n\n    // Attempt to load the resource using path-loader\n    allTasks = PathLoader.load(decodeURI(url), loaderOptions);\n\n    // Update the cache\n    allTasks = allTasks\n      .then(function (res) {\n        remoteCache[url] = {\n          value: res\n        };\n\n        return res;\n      })\n      .catch(function (err) {\n        remoteCache[url] = {\n          error: err\n        };\n\n        throw err;\n      });\n  } else {\n    // Return the cached version\n    allTasks = allTasks.then(function () {\n      if (_.isError(cacheEntry.error)) {\n        throw cacheEntry.error;\n      } else {\n        return cacheEntry.value;\n      }\n    });\n  }\n\n  // Return a cloned version to avoid updating the cache\n  allTasks = allTasks.then(function (res) {\n    return _.cloneDeep(res);\n  });\n\n  return allTasks;\n}\n\nfunction isRefLike (obj, throwWithDetails) {\n  var refLike = true;\n\n  try {\n    if (!_.isPlainObject(obj)) {\n      throw new Error('obj is not an Object');\n    } else if (!_.isString(obj.$ref)) {\n      throw new Error('obj.$ref is not a String');\n    }\n  } catch (err) {\n    if (throwWithDetails) {\n      throw err;\n    }\n\n    refLike = false;\n  }\n\n  return refLike;\n}\n\nfunction makeAbsolute (location) {\n  if (location.indexOf('://') === -1 && !path.isAbsolute(location)) {\n    return path.resolve(process.cwd(), location);\n  } else {\n    return location;\n  }\n}\n\nfunction makeRefFilter (options) {\n  var refFilter;\n  var validTypes;\n\n  if (_.isArray(options.filter) || _.isString(options.filter)) {\n    validTypes = _.isString(options.filter) ? [options.filter] : options.filter;\n    refFilter = function (refDetails) {\n      // Check the exact type or for invalid URIs, check its original type\n      return validTypes.indexOf(refDetails.type) > -1 || validTypes.indexOf(getRefType(refDetails)) > -1;\n    };\n  } else if (_.isFunction(options.filter)) {\n    refFilter = options.filter;\n  } else if (_.isUndefined(options.filter)) {\n    refFilter = function () {\n      return true;\n    };\n  }\n\n  return function (refDetails, path) {\n    return (refDetails.type !== 'invalid' || options.includeInvalid === true) && refFilter(refDetails, path);\n  };\n}\n\nfunction makeSubDocPath (options) {\n  var subDocPath;\n\n  if (_.isArray(options.subDocPath)) {\n    subDocPath = options.subDocPath;\n  } else if (_.isString(options.subDocPath)) {\n    subDocPath = pathFromPtr(options.subDocPath);\n  } else if (_.isUndefined(options.subDocPath)) {\n    subDocPath = [];\n  }\n\n  return subDocPath;\n}\n\nfunction markMissing (refDetails, err) {\n  refDetails.error = err.message;\n  refDetails.missing = true;\n}\n\nfunction parseURI (uri) {\n  // We decode first to avoid doubly encoding\n  return URI.parse(encodeURI(decodeURI(uri)));\n}\n\nfunction buildRefModel (document, options, metadata) {\n  var allTasks = Promise.resolve();\n  var subDocPtr = pathToPtr(options.subDocPath);\n  var absLocation = makeAbsolute(options.location);\n  var relativeBase = path.dirname(options.location);\n  var docDepKey = absLocation + subDocPtr;\n  var refs;\n  var rOptions;\n\n  // Store the document in the metadata if necessary\n  if (_.isUndefined(metadata.docs[absLocation])) {\n    metadata.docs[absLocation] = document;\n  }\n\n  // If there are no dependencies stored for the location+subDocPath, we've never seen it before and will process it\n  if (_.isUndefined(metadata.deps[docDepKey])) {\n    metadata.deps[docDepKey] = {};\n\n    // Find the references based on the options\n    refs = findRefs(document, options);\n\n    // Iterate over the references and process\n    _.forOwn(refs, function (refDetails, refPtr) {\n      var refKey = makeAbsolute(options.location) + refPtr;\n      var refdKey = refDetails.refdId = makeAbsolute(isRemote(refDetails) ?\n                                                       combineURIs(relativeBase, refDetails.uri) :\n                                                       options.location) + '#' +\n                                          (refDetails.uri.indexOf('#') > -1 ?\n                                             refDetails.uri.split('#')[1] :\n                                             '');\n\n      // Record reference metadata\n      metadata.refs[refKey] = refDetails;\n\n      // Do not process invalid references\n      if (!isValid(refDetails)) {\n        return;\n      }\n\n      // Record dependency (relative to the document's sub-document path)\n      metadata.deps[docDepKey][refPtr === subDocPtr ? '#' : refPtr.replace(subDocPtr + '/', '#/')] = refdKey;\n\n      // Do not process directly-circular references (to an ancestor or self)\n      if (refKey.indexOf(refdKey + '/') === 0) {\n        refDetails.circular = true;\n\n        return;\n      }\n\n      // Prepare the options for subsequent processDocument calls\n      rOptions = _.cloneDeep(options);\n\n      rOptions.subDocPath = _.isUndefined(refDetails.uriDetails.fragment) ?\n                                     [] :\n                                     pathFromPtr(decodeURI(refDetails.uriDetails.fragment));\n\n      // Resolve the reference\n      if (isRemote(refDetails)) {\n        // Delete filter.options because all remote references should be fully resolved\n        delete rOptions.filter;\n        // The new location being referenced\n        rOptions.location = refdKey.split('#')[0];\n\n        allTasks = allTasks\n          .then(function (nMetadata, nOptions) {\n            return function () {\n              var rAbsLocation = makeAbsolute(nOptions.location);\n              var rDoc = nMetadata.docs[rAbsLocation];\n\n              if (_.isUndefined(rDoc)) {\n                // We have no cache so we must retrieve the document\n                return getRemoteDocument(rAbsLocation, nOptions)\n                        .catch(function (err) {\n                          // Store the response in the document cache\n                          nMetadata.docs[rAbsLocation] = err;\n\n                          // Return the error to allow the subsequent `then` to handle both errors and successes\n                          return err;\n                        });\n              } else {\n                // We have already retrieved (or attempted to) the document and should use the cached version in the\n                // metadata since it could already be processed some.\n                return Promise.resolve()\n                  .then(function () {\n                    return rDoc;\n                  });\n              }\n            };\n          }(metadata, rOptions));\n      } else {\n        allTasks = allTasks\n          .then(function () {\n            return document;\n          });\n      }\n\n      // Process the remote document or the referenced portion of the local document\n      allTasks = allTasks\n        .then(function (nMetadata, nOptions, nRefDetails) {\n          return function (doc) {\n            if (_.isError(doc)) {\n              markMissing(nRefDetails, doc);\n            } else {\n              // Wrapped in a try/catch since findRefs throws\n              try {\n                return buildRefModel(doc, nOptions, nMetadata)\n                  .catch(function (err) {\n                    markMissing(nRefDetails, err);\n                  });\n              } catch (err) {\n                markMissing(nRefDetails, err);\n              }\n            }\n          };\n        }(metadata, rOptions, refDetails));\n    });\n  }\n\n  return allTasks;\n}\n\nfunction setValue (obj, refPath, value) {\n  findValue(obj, refPath.slice(0, refPath.length - 1))[decodeURI(refPath[refPath.length - 1])] = value;\n}\n\nfunction walk (ancestors, node, path, fn) {\n  var processChildren = true;\n\n  function walkItem (item, segment) {\n    path.push(segment);\n    walk(ancestors, item, path, fn);\n    path.pop();\n  }\n\n  // Call the iteratee\n  if (_.isFunction(fn)) {\n    processChildren = fn(ancestors, node, path);\n  }\n\n  // We do not process circular objects again\n  if (ancestors.indexOf(node) === -1) {\n    ancestors.push(node);\n\n    if (processChildren !== false) {\n      if (_.isArray(node)) {\n        node.forEach(function (member, index) {\n          walkItem(member, index.toString());\n        });\n      } else if (_.isObject(node)) {\n        _.forOwn(node, function (cNode, key) {\n          walkItem(cNode, key);\n        });\n      }\n    }\n\n    ancestors.pop();\n  }\n}\n\nfunction validateOptions (options, obj) {\n  var locationParts;\n\n  if (_.isUndefined(options)) {\n    // Default to an empty options object\n    options = {};\n  } else {\n    // Clone the options so we do not alter the ones passed in\n    options = _.cloneDeep(options);\n  }\n\n  if (!_.isObject(options)) {\n    throw new TypeError('options must be an Object');\n  } else if (!_.isUndefined(options.resolveCirculars) &&\n             !_.isBoolean(options.resolveCirculars)) {\n    throw new TypeError('options.resolveCirculars must be a Boolean');\n  } else if (!_.isUndefined(options.filter) &&\n             !_.isArray(options.filter) &&\n             !_.isFunction(options.filter) &&\n             !_.isString(options.filter)) {\n    throw new TypeError('options.filter must be an Array, a Function of a String');\n  } else if (!_.isUndefined(options.includeInvalid) &&\n             !_.isBoolean(options.includeInvalid)) {\n    throw new TypeError('options.includeInvalid must be a Boolean');\n  } else if (!_.isUndefined(options.location) &&\n             !_.isString(options.location)) {\n    throw new TypeError('options.location must be a String');\n  } else if (!_.isUndefined(options.refPreProcessor) &&\n             !_.isFunction(options.refPreProcessor)) {\n    throw new TypeError('options.refPreProcessor must be a Function');\n  } else if (!_.isUndefined(options.refPostProcessor) &&\n             !_.isFunction(options.refPostProcessor)) {\n    throw new TypeError('options.refPostProcessor must be a Function');\n  } else if (!_.isUndefined(options.subDocPath) &&\n             !_.isArray(options.subDocPath) &&\n             !isPtr(options.subDocPath)) {\n    // If a pointer is provided, throw an error if it's not the proper type\n    throw new TypeError('options.subDocPath must be an Array of path segments or a valid JSON Pointer');\n  }\n\n  // Default to false for allowing circulars\n  if (_.isUndefined(options.resolveCirculars)) {\n    options.resolveCirculars = false;\n  }\n\n  options.filter = makeRefFilter(options);\n\n  // options.location is not officially supported yet but will be when Issue 88 is complete\n  if (_.isUndefined(options.location)) {\n    options.location = makeAbsolute('./root.json');\n  }\n\n  locationParts = options.location.split('#');\n\n  // If options.location contains a fragment, turn it into an options.subDocPath\n  if (locationParts.length > 1) {\n    options.subDocPath = '#' + locationParts[1];\n  }\n\n  // Just to be safe, remove any accidental fragment as it would break things\n  options.location = combineURIs(options.location, undefined);\n\n  // Set the subDocPath to avoid everyone else having to compute it\n  options.subDocPath = makeSubDocPath(options);\n\n  if (!_.isUndefined(obj)) {\n    try {\n      findValue(obj, options.subDocPath);\n    } catch (err) {\n      err.message = err.message.replace('JSON Pointer', 'options.subDocPath');\n\n      throw err;\n    }\n  }\n\n  return options;\n}\n\n/* Module Members */\n\n/*\n * Each of the functions below are defined as function statements and *then* exported in two steps instead of one due\n * to a bug in jsdoc (https://github.com/jsdoc2md/jsdoc-parse/issues/18) that causes our documentation to be\n * generated improperly.  The impact to the user is significant enough for us to warrant working around it until this\n * is fixed.\n */\n\n/**\n * The options used for various JsonRefs APIs.\n *\n * @typedef {object} JsonRefsOptions\n *\n * @param {string|string[]|function} [filter=function () {return true;}] - The filter to use when gathering JSON\n * References *(If this value is a single string or an array of strings, the value(s) are expected to be the `type(s)`\n * you are interested in collecting as described in {@link module:JsonRefs.getRefDetails}.  If it is a function, it is\n * expected that the function behaves like {@link module:JsonRefs~RefDetailsFilter}.)*\n * @param {boolean} [includeInvalid=false] - Whether or not to include invalid JSON Reference details *(This will make\n * it so that objects that are like JSON Reference objects, as in they are an `Object` and the have a `$ref` property,\n * but fail validation will be included.  This is very useful for when you want to know if you have invalid JSON\n * Reference definitions.  This will not mean that APIs will process invalid JSON References but the reasons as to why\n * the JSON References are invalid will be included in the returned metadata.)*\n * @param {object} [loaderOptions] - The options to pass to\n * {@link https://github.com/whitlockjc/path-loader/blob/master/docs/API.md#module_PathLoader.load|PathLoader~load}\n * @param {string} [location=root.json] - The location of the document being processed  *(This property is only useful\n * when resolving references as it will be used to locate relative references found within the document being resolved.\n * If this value is relative, {@link https://github.com/whitlockjc/path-loader|path-loader} will use\n * `window.location.href` for the browser and `process.cwd()` for Node.js.)*\n * @param {module:JsonRefs~RefPreProcessor} [refPreProcessor] - The callback used to pre-process a JSON Reference like\n * object *(This is called prior to validating the JSON Reference like object and getting its details)*\n * @param {module:JsonRefs~RefPostProcessor} [refPostProcessor] - The callback used to post-process the JSON Reference\n * metadata *(This is called prior filtering the references)*\n * @param {boolean} [resolveCirculars=false] - Whether to resolve circular references\n * @param {string|string[]} [options.subDocPath=[]] - The JSON Pointer or array of path segments to the sub document\n * location to search from\n */\n\n/**\n * Simple function used to filter out JSON References.\n *\n * @typedef {function} RefDetailsFilter\n *\n * @param {module:JsonRefs~UnresolvedRefDetails} refDetails - The JSON Reference details to test\n * @param {string[]} path - The path to the JSON Reference\n *\n * @returns {boolean} whether the JSON Reference should be filtered *(out)* or not\n */\n\n/**\n * Simple function used to pre-process a JSON Reference like object.\n *\n * @typedef {function} RefPreProcessor\n *\n * @param {object} obj - The JSON Reference like object\n * @param {string[]} path - The path to the JSON Reference like object\n *\n * @returns {object} the processed JSON Reference like object\n */\n\n/**\n * Simple function used to post-process a JSON Reference details.\n *\n * @typedef {function} RefPostProcessor\n *\n * @param {module:JsonRefs~UnresolvedRefDetails} refDetails - The JSON Reference details to test\n * @param {string[]} path - The path to the JSON Reference\n *\n * @returns {object} the processed JSON Reference details object\n */\n\n/**\n * Detailed information about resolved JSON References.\n *\n * @typedef {module:JsonRefs~UnresolvedRefDetails} ResolvedRefDetails\n *\n * @property {boolean} [circular] - Whether or not the JSON Reference is circular *(Will not be set if the JSON\n * Reference is not circular)*\n * @property {boolean} [missing] - Whether or not the referenced value was missing or not *(Will not be set if the\n * referenced value is not missing)*\n * @property {*} [value] - The referenced value *(Will not be set if the referenced value is missing)*\n */\n\n/**\n * The results of resolving the JSON References of an array/object.\n *\n * @typedef {object} ResolvedRefsResults\n *\n * @property {module:JsonRefs~ResolvedRefDetails} refs - An object whose keys are JSON Pointers *(fragment version)*\n * to where the JSON Reference is defined and whose values are {@link module:JsonRefs~ResolvedRefDetails}\n * @property {object} resolved - The array/object with its JSON References fully resolved\n */\n\n/**\n * An object containing the retrieved document and detailed information about its JSON References.\n *\n * @typedef {module:JsonRefs~ResolvedRefsResults} RetrievedRefsResults\n *\n * @property {object} value - The retrieved document\n */\n\n/**\n * An object containing the retrieved document, the document with its references resolved and  detailed information\n * about its JSON References.\n *\n * @typedef {object} RetrievedResolvedRefsResults\n *\n * @property {module:JsonRefs~UnresolvedRefDetails} refs - An object whose keys are JSON Pointers *(fragment version)*\n * to where the JSON Reference is defined and whose values are {@link module:JsonRefs~UnresolvedRefDetails}\n * @property {ResolvedRefsResults} - An object whose keys are JSON Pointers *(fragment version)*\n * to where the JSON Reference is defined and whose values are {@link module:JsonRefs~ResolvedRefDetails}\n * @property {object} value - The retrieved document\n */\n\n/**\n * Detailed information about unresolved JSON References.\n *\n * @typedef {object} UnresolvedRefDetails\n *\n * @property {object} def - The JSON Reference definition\n * @property {string} [error] - The error information for invalid JSON Reference definition *(Only present when the\n * JSON Reference definition is invalid or there was a problem retrieving a remote reference during resolution)*\n * @property {string} uri - The URI portion of the JSON Reference\n * @property {object} uriDetails - Detailed information about the URI as provided by\n * {@link https://github.com/garycourt/uri-js|URI.parse}.\n * @property {string} type - The JSON Reference type *(This value can be one of the following: `invalid`, `local`,\n * `relative` or `remote`.)*\n * @property {string} [warning] - The warning information *(Only present when the JSON Reference definition produces a\n * warning)*\n */\n\n/**\n * Clears the internal cache of remote documents, reference details, etc.\n *\n * @alias module:JsonRefs.clearCache\n */\nfunction clearCache () {\n  remoteCache = {};\n}\n\n/**\n * Takes an array of path segments and decodes the JSON Pointer tokens in them.\n *\n * @param {string[]} path - The array of path segments\n *\n * @returns {string} the array of path segments with their JSON Pointer tokens decoded\n *\n * @throws {Error} if the path is not an `Array`\n *\n * @see {@link https://tools.ietf.org/html/rfc6901#section-3}\n *\n * @alias module:JsonRefs.decodePath\n */\nfunction decodePath (path) {\n  if (!_.isArray(path)) {\n    throw new TypeError('path must be an array');\n  }\n\n  return path.map(function (seg) {\n    if (!_.isString(seg)) {\n      seg = JSON.stringify(seg);\n    }\n\n    return decodeURI(seg.replace(/~1/g, '/').replace(/~0/g, '~'));\n  });\n}\n\n/**\n * Takes an array of path segments and encodes the special JSON Pointer characters in them.\n *\n * @param {string[]} path - The array of path segments\n *\n * @returns {string} the array of path segments with their JSON Pointer tokens encoded\n *\n * @throws {Error} if the path is not an `Array`\n *\n * @see {@link https://tools.ietf.org/html/rfc6901#section-3}\n *\n * @alias module:JsonRefs.encodePath\n */\nfunction encodePath (path) {\n  if (!_.isArray(path)) {\n    throw new TypeError('path must be an array');\n  }\n\n  return path.map(function (seg) {\n    if (!_.isString(seg)) {\n      seg = JSON.stringify(seg);\n    }\n\n    return seg.replace(/~/g, '~0').replace(/\\//g, '~1');\n  });\n}\n\n/**\n * Finds JSON References defined within the provided array/object.\n *\n * @param {array|object} obj - The structure to find JSON References within\n * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options\n *\n * @returns {object} an object whose keys are JSON Pointers *(fragment version)* to where the JSON Reference is defined\n * and whose values are {@link module:JsonRefs~UnresolvedRefDetails}.\n *\n * @throws {Error} when the input arguments fail validation or if `options.subDocPath` points to an invalid location\n *\n * @alias module:JsonRefs.findRefs\n *\n * @example\n * // Finding all valid references\n * var allRefs = JsonRefs.findRefs(obj);\n * // Finding all remote references\n * var remoteRefs = JsonRefs.findRefs(obj, {filter: ['relative', 'remote']});\n * // Finding all invalid references\n * var invalidRefs = JsonRefs.findRefs(obj, {filter: 'invalid', includeInvalid: true});\n */\nfunction findRefs (obj, options) {\n  var refs = {};\n\n  // Validate the provided document\n  if (!_.isArray(obj) && !_.isObject(obj)) {\n    throw new TypeError('obj must be an Array or an Object');\n  }\n\n  // Validate options\n  options = validateOptions(options, obj);\n\n  // Walk the document (or sub document) and find all JSON References\n  walk(findAncestors(obj, options.subDocPath),\n       findValue(obj, options.subDocPath),\n       _.cloneDeep(options.subDocPath),\n       function (ancestors, node, path) {\n         var processChildren = true;\n         var refDetails;\n         var refPtr;\n\n         if (isRefLike(node)) {\n           // Pre-process the node when necessary\n           if (!_.isUndefined(options.refPreProcessor)) {\n             node = options.refPreProcessor(_.cloneDeep(node), path);\n           }\n\n           refDetails = getRefDetails(node);\n\n           // Post-process the reference details\n           if (!_.isUndefined(options.refPostProcessor)) {\n             refDetails = options.refPostProcessor(refDetails, path);\n           }\n\n           if (options.filter(refDetails, path)) {\n             refPtr = pathToPtr(path);\n\n             refs[refPtr] = refDetails;\n           }\n\n           // Whenever a JSON Reference has extra children, its children should not be processed.\n           //   See: http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03#section-3\n           if (getExtraRefKeys(node).length > 0) {\n             processChildren = false;\n           }\n         }\n\n         return processChildren;\n       });\n\n  return refs;\n}\n\n/**\n * Finds JSON References defined within the document at the provided location.\n *\n * This API is identical to {@link module:JsonRefs.findRefs} except this API will retrieve a remote document and then\n * return the result of {@link module:JsonRefs.findRefs} on the retrieved document.\n *\n * @param {string} location - The location to retrieve *(Can be relative or absolute, just make sure you look at the\n * {@link module:JsonRefs~JsonRefsOptions|options documentation} to see how relative references are handled.)*\n * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options\n *\n * @returns {Promise} a promise that resolves a {@link module:JsonRefs~RetrievedRefsResults} and rejects with an\n * `Error` when the input arguments fail validation, when `options.subDocPath` points to an invalid location or when\n *  the location argument points to an unloadable resource\n *\n * @alias module:JsonRefs.findRefsAt\n *\n * @example\n * // Example that only resolves references within a sub document\n * JsonRefs.findRefsAt('http://petstore.swagger.io/v2/swagger.json', {\n *     subDocPath: '#/definitions'\n *   })\n *   .then(function (res) {\n *      // Do something with the response\n *      //\n *      // res.refs: JSON Reference locations and details\n *      // res.value: The retrieved document\n *   }, function (err) {\n *     console.log(err.stack);\n *   });\n */\nfunction findRefsAt (location, options) {\n  var allTasks = Promise.resolve();\n\n  allTasks = allTasks\n    .then(function () {\n      // Validate the provided location\n      if (!_.isString(location)) {\n        throw new TypeError('location must be a string');\n      }\n\n      if (_.isUndefined(options)) {\n        options = {};\n      }\n\n      if (_.isObject(options)) {\n        // Add the location to the options for processing/validation\n        options.location = location;\n      }\n\n      // Validate options\n      options = validateOptions(options);\n\n      return getRemoteDocument(options.location, options);\n    })\n    .then(function (res) {\n      var cacheEntry = _.cloneDeep(remoteCache[options.location]);\n      var cOptions = _.cloneDeep(options);\n      var uriDetails = parseURI(options.location);\n\n      if (_.isUndefined(cacheEntry.refs)) {\n        // Do not filter any references so the cache is complete\n        delete cOptions.filter;\n        delete cOptions.subDocPath;\n\n        cOptions.includeInvalid = true;\n\n        remoteCache[options.location].refs = findRefs(res, cOptions);\n      }\n\n      // Add the filter options back\n      if (!_.isUndefined(options.filter)) {\n        cOptions.filter = options.filter;\n      }\n\n      if (!_.isUndefined(uriDetails.fragment)) {\n        cOptions.subDocPath = pathFromPtr(decodeURI(uriDetails.fragment));\n      } else if (!_.isUndefined(uriDetails.subDocPath)) {\n        cOptions.subDocPath = options.subDocPath;\n      }\n\n      // This will use the cache so don't worry about calling it twice\n      return {\n        refs: findRefs(res, cOptions),\n        value: res\n      };\n    });\n\n  return allTasks;\n}\n\n/**\n * Returns detailed information about the JSON Reference.\n *\n * @param {object} obj - The JSON Reference definition\n *\n * @returns {module:JsonRefs~UnresolvedRefDetails} the detailed information\n *\n * @alias module:JsonRefs.getRefDetails\n */\nfunction getRefDetails (obj) {\n  var details = {\n    def: obj\n  };\n  var cacheKey;\n  var extraKeys;\n  var uriDetails;\n\n  try {\n    if (isRefLike(obj, true)) {\n      cacheKey = obj.$ref;\n      uriDetails = uriDetailsCache[cacheKey];\n\n      if (_.isUndefined(uriDetails)) {\n        uriDetails = uriDetailsCache[cacheKey] = parseURI(cacheKey);\n      }\n\n      details.uri = cacheKey;\n      details.uriDetails = uriDetails;\n\n      if (_.isUndefined(uriDetails.error)) {\n        details.type = getRefType(details);\n      } else {\n        details.error = details.uriDetails.error;\n        details.type = 'invalid';\n      }\n\n      // Identify warning\n      extraKeys = getExtraRefKeys(obj);\n\n      if (extraKeys.length > 0) {\n        details.warning = 'Extra JSON Reference properties will be ignored: ' + extraKeys.join(', ');\n      }\n    } else {\n      details.type = 'invalid';\n    }\n  } catch (err) {\n    details.error = err.message;\n    details.type = 'invalid';\n  }\n\n  return details;\n}\n\n/**\n * Returns whether the argument represents a JSON Pointer.\n *\n * A string is a JSON Pointer if the following are all true:\n *\n *   * The string is of type `String`\n *   * The string must be empty, `#` or start with a `/` or `#/`\n *\n * @param {string} ptr - The string to check\n * @param {boolean} [throwWithDetails=false] - Whether or not to throw an `Error` with the details as to why the value\n * provided is invalid\n *\n * @returns {boolean} the result of the check\n *\n * @throws {error} when the provided value is invalid and the `throwWithDetails` argument is `true`\n *\n * @alias module:JsonRefs.isPtr\n *\n * @see {@link https://tools.ietf.org/html/rfc6901#section-3}\n *\n * @example\n * // Separating the different ways to invoke isPtr for demonstration purposes\n * if (isPtr(str)) {\n *   // Handle a valid JSON Pointer\n * } else {\n *   // Get the reason as to why the value is not a JSON Pointer so you can fix/report it\n *   try {\n *     isPtr(str, true);\n *   } catch (err) {\n *     // The error message contains the details as to why the provided value is not a JSON Pointer\n *   }\n * }\n */\nfunction isPtr (ptr, throwWithDetails) {\n  var valid = true;\n  var firstChar;\n\n  try {\n    if (_.isString(ptr)) {\n      if (ptr !== '') {\n        firstChar = ptr.charAt(0);\n\n        if (['#', '/'].indexOf(firstChar) === -1) {\n          throw new Error('ptr must start with a / or #/');\n        } else if (firstChar === '#' && ptr !== '#' && ptr.charAt(1) !== '/') {\n          throw new Error('ptr must start with a / or #/');\n        } else if (ptr.match(badPtrTokenRegex)) {\n          throw new Error('ptr has invalid token(s)');\n        }\n      }\n    } else {\n      throw new Error('ptr is not a String');\n    }\n  } catch (err) {\n    if (throwWithDetails === true) {\n      throw err;\n    }\n\n    valid = false;\n  }\n\n  return valid;\n}\n\n/**\n * Returns whether the argument represents a JSON Reference.\n *\n * An object is a JSON Reference only if the following are all true:\n *\n *   * The object is of type `Object`\n *   * The object has a `$ref` property\n *   * The `$ref` property is a valid URI *(We do not require 100% strict URIs and will handle unescaped special\n *     characters.)*\n *\n * @param {object} obj - The object to check\n * @param {boolean} [throwWithDetails=false] - Whether or not to throw an `Error` with the details as to why the value\n * provided is invalid\n *\n * @returns {boolean} the result of the check\n *\n * @throws {error} when the provided value is invalid and the `throwWithDetails` argument is `true`\n *\n * @alias module:JsonRefs.isRef\n *\n * @see {@link http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03#section-3}\n *\n * @example\n * // Separating the different ways to invoke isRef for demonstration purposes\n * if (isRef(obj)) {\n *   // Handle a valid JSON Reference\n * } else {\n *   // Get the reason as to why the value is not a JSON Reference so you can fix/report it\n *   try {\n *     isRef(str, true);\n *   } catch (err) {\n *     // The error message contains the details as to why the provided value is not a JSON Reference\n *   }\n * }\n */\nfunction isRef (obj, throwWithDetails) {\n  return isRefLike(obj, throwWithDetails) && getRefDetails(obj, throwWithDetails).type !== 'invalid';\n}\n\n/**\n * Returns an array of path segments for the provided JSON Pointer.\n *\n * @param {string} ptr - The JSON Pointer\n *\n * @returns {string[]} the path segments\n *\n * @throws {Error} if the provided `ptr` argument is not a JSON Pointer\n *\n * @alias module:JsonRefs.pathFromPtr\n */\nfunction pathFromPtr (ptr) {\n  try {\n    isPtr(ptr, true);\n  } catch (err) {\n    throw new Error('ptr must be a JSON Pointer: ' + err.message);\n  }\n\n  var segments = ptr.split('/');\n\n  // Remove the first segment\n  segments.shift();\n\n  return decodePath(segments);\n}\n\n/**\n * Returns a JSON Pointer for the provided array of path segments.\n *\n * **Note:** If a path segment in `path` is not a `String`, it will be converted to one using `JSON.stringify`.\n *\n * @param {string[]} path - The array of path segments\n * @param {boolean} [hashPrefix=true] - Whether or not create a hash-prefixed JSON Pointer\n *\n * @returns {string} the corresponding JSON Pointer\n *\n * @throws {Error} if the `path` argument is not an array\n *\n * @alias module:JsonRefs.pathToPtr\n */\nfunction pathToPtr (path, hashPrefix) {\n  if (!_.isArray(path)) {\n    throw new Error('path must be an Array');\n  }\n\n  // Encode each segment and return\n  return (hashPrefix !== false ? '#' : '') + (path.length > 0 ? '/' : '') + encodePath(path).join('/');\n}\n\n/**\n * Finds JSON References defined within the provided array/object and resolves them.\n *\n * @param {array|object} obj - The structure to find JSON References within\n * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options\n *\n * @returns {Promise} a promise that resolves a {@link module:JsonRefs~ResolvedRefsResults} and rejects with an\n * `Error` when the input arguments fail validation, when `options.subDocPath` points to an invalid location or when\n *  the location argument points to an unloadable resource\n *\n * @alias module:JsonRefs.resolveRefs\n *\n * @example\n * // Example that only resolves relative and remote references\n * JsonRefs.resolveRefs(swaggerObj, {\n *     filter: ['relative', 'remote']\n *   })\n *   .then(function (res) {\n *      // Do something with the response\n *      //\n *      // res.refs: JSON Reference locations and details\n *      // res.resolved: The document with the appropriate JSON References resolved\n *   }, function (err) {\n *     console.log(err.stack);\n *   });\n */\nfunction resolveRefs (obj, options) {\n  var allTasks = Promise.resolve();\n\n  allTasks = allTasks\n    .then(function () {\n      // Validate the provided document\n      if (!_.isArray(obj) && !_.isObject(obj)) {\n        throw new TypeError('obj must be an Array or an Object');\n      }\n\n      // Validate options\n      options = validateOptions(options, obj);\n\n      // Clone the input so we do not alter it\n      obj = _.cloneDeep(obj);\n    })\n    .then(function () {\n      var metadata = {\n        deps: {}, // To avoid processing the same refernece twice, and for circular reference identification\n        docs: {}, // Cache to avoid processing the same document more than once\n        refs: {} // Reference locations and their metadata\n      };\n\n      return buildRefModel(obj, options, metadata)\n        .then(function () {\n          return metadata;\n        });\n    })\n    .then(function (results) {\n      var allRefs = {};\n      var circularPaths = [];\n      var circulars = [];\n      var depGraph = new gl.Graph();\n      var fullLocation = makeAbsolute(options.location);\n      var refsRoot = fullLocation + pathToPtr(options.subDocPath);\n\n      // Identify circulars\n\n      // Add nodes first\n      Object.keys(results.deps).forEach(function (node) {\n        depGraph.setNode(node);\n      });\n\n      // Add edges\n      _.forOwn(results.deps, function (props, node) {\n        _.forOwn(props, function (dep) {\n          depGraph.setEdge(node, dep);\n        });\n      });\n\n      circularPaths = gl.alg.findCycles(depGraph);\n\n      // Create a unique list of circulars\n      circularPaths.forEach(function (path) {\n        path.forEach(function (seg) {\n          if (circulars.indexOf(seg) === -1) {\n            circulars.push(seg);\n          }\n        });\n      });\n\n      // Process circulars\n      _.forOwn(results.deps, function (props, node) {\n        _.forOwn(props, function (dep, prop) {\n          var isCircular = false;\n          var refPtr = node + prop.slice(1);\n          var refDetails = results.refs[node + prop.slice(1)];\n          var remote = isRemote(refDetails);\n          var pathIndex;\n\n          if (circulars.indexOf(dep) > -1) {\n            // Figure out if the circular is part of a circular chain or just a reference to a circular\n            circularPaths.forEach(function (path) {\n              // Short circuit\n              if (isCircular) {\n                return;\n              }\n\n              pathIndex = path.indexOf(dep);\n\n              if (pathIndex > -1) {\n                // Check each path segment to see if the reference location is beneath one of its segments\n                path.forEach(function (seg) {\n                  // Short circuit\n                  if (isCircular) {\n                    return;\n                  }\n\n                  if (refPtr.indexOf(seg + '/') === 0) {\n                    // If the reference is local, mark it as circular but if it's a remote reference, only mark it\n                    // circular if the matching path is the last path segment.\n                    if ((remote && pathIndex === path.length - 1) || !remote) {\n                      isCircular = true;\n                    }\n                  }\n                });\n              }\n            });\n          }\n\n          if (isCircular) {\n            // Update all references and reference details\n            refDetails.circular = true;\n          }\n        });\n      });\n\n      // Resolve the references in reverse order since the current order is top-down\n      _.forOwn(Object.keys(results.deps).reverse(), function (parentPtr) {\n        var deps = results.deps[parentPtr];\n        var pPtrParts = parentPtr.split('#');\n        var pDocument = results.docs[pPtrParts[0]];\n        var pPtrPath = pathFromPtr(pPtrParts[1]);\n\n        _.forOwn(deps, function (dep, prop) {\n          var depParts = dep.split('#');\n          var dDocument = results.docs[depParts[0]];\n          var dPtrPath = pPtrPath.concat(pathFromPtr(prop));\n          var refDetails = results.refs[pPtrParts[0] + pathToPtr(dPtrPath)];\n\n          // Resolve reference if valid\n          if (_.isUndefined(refDetails.error) && _.isUndefined(refDetails.missing)) {\n            if (!options.resolveCirculars && refDetails.circular) {\n              refDetails.value = refDetails.def;\n            } else {\n              try {\n                refDetails.value = findValue(dDocument, pathFromPtr(depParts[1]));\n              } catch (err) {\n                markMissing(refDetails, err);\n\n                return;\n              }\n\n              // If the reference is at the root of the document, replace the document in the cache.  Otherwise, replace\n              // the value in the appropriate location in the document cache.\n              if (pPtrParts[1] === '' && prop === '#') {\n                results.docs[pPtrParts[0]] = refDetails.value;\n              } else {\n                setValue(pDocument, dPtrPath, refDetails.value);\n              }\n            }\n          }\n        });\n      });\n\n      function walkRefs (root, refPtr, refPath) {\n        var refPtrParts = refPtr.split('#');\n        var refDetails = results.refs[refPtr];\n        var refDeps;\n\n        // Record the reference (relative to the root document unless the reference is in the root document)\n        allRefs[refPtrParts[0] === options.location ?\n                  '#' + refPtrParts[1] :\n                  pathToPtr(options.subDocPath.concat(refPath))] = refDetails;\n\n        // Do not walk invalid references\n        if (refDetails.circular || !isValid(refDetails)) {\n          // Sanitize errors\n          if (!refDetails.circular && refDetails.error) {\n            // The way we use findRefs now results in an error that doesn't match the expectation\n            refDetails.error = refDetails.error.replace('options.subDocPath', 'JSON Pointer');\n\n            // Update the error to use the appropriate JSON Pointer\n            if (refDetails.error.indexOf('#') > -1) {\n              refDetails.error = refDetails.error.replace(refDetails.uri.substr(refDetails.uri.indexOf('#')),\n                                                          refDetails.uri);\n            }\n\n            // Report errors opening files as JSON Pointer errors\n            if (refDetails.error.indexOf('ENOENT:') === 0 || refDetails.error.indexOf('Not Found') === 0) {\n              refDetails.error = 'JSON Pointer points to missing location: ' + refDetails.uri;\n            }\n          }\n\n          return;\n        }\n\n        refDeps = results.deps[refDetails.refdId];\n\n        if (refDetails.refdId.indexOf(root) !== 0) {\n          Object.keys(refDeps).forEach(function (prop) {\n            walkRefs(refDetails.refdId, refDetails.refdId + prop.substr(1), refPath.concat(pathFromPtr(prop)));\n          });\n        }\n      }\n\n      // For performance reasons, we only process a document (or sub document) and each reference once ever.  This means\n      // that if we want to provide the full picture as to what paths in the resolved document were created as a result\n      // of a reference, we have to take our fully-qualified reference locations and expand them to be all local based\n      // on the original document.\n      Object.keys(results.refs).forEach(function (refPtr) {\n        // We only want to process references found at or beneath the provided document and sub-document path\n        if (refPtr.indexOf(refsRoot) !== 0) {\n          return;\n        }\n\n        walkRefs(refsRoot, refPtr, pathFromPtr(refPtr.substr(refsRoot.length)));\n      });\n\n      // Sanitize the reference details\n      _.forOwn(results.refs, function (refDetails) {\n        // Delete the reference id used for dependency tracking and circular identification\n        delete refDetails.refdId;\n      });\n\n      return {\n        refs: allRefs,\n        resolved: results.docs[fullLocation]\n      };\n    });\n\n  return allTasks;\n}\n\n/**\n * Resolves JSON References defined within the document at the provided location.\n *\n * This API is identical to {@link module:JsonRefs.resolveRefs} except this API will retrieve a remote document and then\n * return the result of {@link module:JsonRefs.resolveRefs} on the retrieved document.\n *\n * @param {string} location - The location to retrieve *(Can be relative or absolute, just make sure you look at the\n * {@link module:JsonRefs~JsonRefsOptions|options documentation} to see how relative references are handled.)*\n * @param {module:JsonRefs~JsonRefsOptions} [options] - The JsonRefs options\n *\n * @returns {Promise} a promise that resolves a {@link module:JsonRefs~RetrievedResolvedRefsResults} and rejects with an\n * `Error` when the input arguments fail validation, when `options.subDocPath` points to an invalid location or when\n *  the location argument points to an unloadable resource\n *\n * @alias module:JsonRefs.resolveRefsAt\n *\n * @example\n * // Example that loads a JSON document (No options.loaderOptions.processContent required) and resolves all references\n * JsonRefs.resolveRefsAt('./swagger.json')\n *   .then(function (res) {\n *      // Do something with the response\n *      //\n *      // res.refs: JSON Reference locations and details\n *      // res.resolved: The document with the appropriate JSON References resolved\n *      // res.value: The retrieved document\n *   }, function (err) {\n *     console.log(err.stack);\n *   });\n */\nfunction resolveRefsAt (location, options) {\n  var allTasks = Promise.resolve();\n\n  allTasks = allTasks\n    .then(function () {\n      // Validate the provided location\n      if (!_.isString(location)) {\n        throw new TypeError('location must be a string');\n      }\n\n      if (_.isUndefined(options)) {\n        options = {};\n      }\n\n      if (_.isObject(options)) {\n        // Add the location to the options for processing/validation\n        options.location = location;\n      }\n\n      // Validate options\n      options = validateOptions(options);\n\n      return getRemoteDocument(options.location, options);\n    })\n    .then(function (res) {\n      var cOptions = _.cloneDeep(options);\n      var uriDetails = parseURI(options.location);\n\n      // Set the sub document path if necessary\n      if (!_.isUndefined(uriDetails.fragment)) {\n        cOptions.subDocPath = pathFromPtr(decodeURI(uriDetails.fragment));\n      }\n\n      return resolveRefs(res, cOptions)\n        .then(function (res2) {\n          return {\n            refs: res2.refs,\n            resolved: res2.resolved,\n            value: res\n          };\n        });\n    });\n\n  return allTasks;\n}\n\n/* Export the module members */\nmodule.exports.clearCache = clearCache;\nmodule.exports.decodePath = decodePath;\nmodule.exports.encodePath = encodePath;\nmodule.exports.findRefs = findRefs;\nmodule.exports.findRefsAt = findRefsAt;\nmodule.exports.getRefDetails = getRefDetails;\nmodule.exports.isPtr = isPtr;\nmodule.exports.isRef = isRef;\nmodule.exports.pathFromPtr = pathFromPtr;\nmodule.exports.pathToPtr = pathToPtr;\nmodule.exports.resolveRefs = resolveRefs;\nmodule.exports.resolveRefsAt = resolveRefsAt;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/** Used to pool arrays and objects used internally */\nvar arrayPool = [];\n\nmodule.exports = arrayPool;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar baseCreate = require('lodash._basecreate'),\n    isObject = require('lodash.isobject'),\n    setBindData = require('lodash._setbinddata'),\n    slice = require('lodash._slice');\n\n/**\n * Used for `Array` method references.\n *\n * Normally `Array.prototype` would suffice, however, using an array literal\n * avoids issues in Narwhal.\n */\nvar arrayRef = [];\n\n/** Native method shortcuts */\nvar push = arrayRef.push;\n\n/**\n * The base implementation of `_.bind` that creates the bound function and\n * sets its meta data.\n *\n * @private\n * @param {Array} bindData The bind data array.\n * @returns {Function} Returns the new bound function.\n */\nfunction baseBind(bindData) {\n  var func = bindData[0],\n      partialArgs = bindData[2],\n      thisArg = bindData[4];\n\n  function bound() {\n    // `Function#bind` spec\n    // http://es5.github.io/#x15.3.4.5\n    if (partialArgs) {\n      // avoid `arguments` object deoptimizations by using `slice` instead\n      // of `Array.prototype.slice.call` and not assigning `arguments` to a\n      // variable as a ternary expression\n      var args = slice(partialArgs);\n      push.apply(args, arguments);\n    }\n    // mimic the constructor's `return` behavior\n    // http://es5.github.io/#x13.2.2\n    if (this instanceof bound) {\n      // ensure `new bound` is an instance of `func`\n      var thisBinding = baseCreate(func.prototype),\n          result = func.apply(thisBinding, args || arguments);\n      return isObject(result) ? result : thisBinding;\n    }\n    return func.apply(thisArg, args || arguments);\n  }\n  setBindData(bound, bindData);\n  return bound;\n}\n\nmodule.exports = baseBind;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar assign = require('lodash.assign'),\n    forEach = require('lodash.foreach'),\n    forOwn = require('lodash.forown'),\n    getArray = require('lodash._getarray'),\n    isArray = require('lodash.isarray'),\n    isObject = require('lodash.isobject'),\n    releaseArray = require('lodash._releasearray'),\n    slice = require('lodash._slice');\n\n/** Used to match regexp flags from their coerced string values */\nvar reFlags = /\\w*$/;\n\n/** `Object#toString` result shortcuts */\nvar argsClass = '[object Arguments]',\n    arrayClass = '[object Array]',\n    boolClass = '[object Boolean]',\n    dateClass = '[object Date]',\n    funcClass = '[object Function]',\n    numberClass = '[object Number]',\n    objectClass = '[object Object]',\n    regexpClass = '[object RegExp]',\n    stringClass = '[object String]';\n\n/** Used to identify object classifications that `_.clone` supports */\nvar cloneableClasses = {};\ncloneableClasses[funcClass] = false;\ncloneableClasses[argsClass] = cloneableClasses[arrayClass] =\ncloneableClasses[boolClass] = cloneableClasses[dateClass] =\ncloneableClasses[numberClass] = cloneableClasses[objectClass] =\ncloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;\n\n/** Used for native method references */\nvar objectProto = Object.prototype;\n\n/** Used to resolve the internal [[Class]] of values */\nvar toString = objectProto.toString;\n\n/** Native method shortcuts */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Used to lookup a built-in constructor by [[Class]] */\nvar ctorByClass = {};\nctorByClass[arrayClass] = Array;\nctorByClass[boolClass] = Boolean;\nctorByClass[dateClass] = Date;\nctorByClass[funcClass] = Function;\nctorByClass[objectClass] = Object;\nctorByClass[numberClass] = Number;\nctorByClass[regexpClass] = RegExp;\nctorByClass[stringClass] = String;\n\n/**\n * The base implementation of `_.clone` without argument juggling or support\n * for `thisArg` binding.\n *\n * @private\n * @param {*} value The value to clone.\n * @param {boolean} [isDeep=false] Specify a deep clone.\n * @param {Function} [callback] The function to customize cloning values.\n * @param {Array} [stackA=[]] Tracks traversed source objects.\n * @param {Array} [stackB=[]] Associates clones with source counterparts.\n * @returns {*} Returns the cloned value.\n */\nfunction baseClone(value, isDeep, callback, stackA, stackB) {\n  if (callback) {\n    var result = callback(value);\n    if (typeof result != 'undefined') {\n      return result;\n    }\n  }\n  // inspect [[Class]]\n  var isObj = isObject(value);\n  if (isObj) {\n    var className = toString.call(value);\n    if (!cloneableClasses[className]) {\n      return value;\n    }\n    var ctor = ctorByClass[className];\n    switch (className) {\n      case boolClass:\n      case dateClass:\n        return new ctor(+value);\n\n      case numberClass:\n      case stringClass:\n        return new ctor(value);\n\n      case regexpClass:\n        result = ctor(value.source, reFlags.exec(value));\n        result.lastIndex = value.lastIndex;\n        return result;\n    }\n  } else {\n    return value;\n  }\n  var isArr = isArray(value);\n  if (isDeep) {\n    // check for circular references and return corresponding clone\n    var initedStack = !stackA;\n    stackA || (stackA = getArray());\n    stackB || (stackB = getArray());\n\n    var length = stackA.length;\n    while (length--) {\n      if (stackA[length] == value) {\n        return stackB[length];\n      }\n    }\n    result = isArr ? ctor(value.length) : {};\n  }\n  else {\n    result = isArr ? slice(value) : assign({}, value);\n  }\n  // add array properties assigned by `RegExp#exec`\n  if (isArr) {\n    if (hasOwnProperty.call(value, 'index')) {\n      result.index = value.index;\n    }\n    if (hasOwnProperty.call(value, 'input')) {\n      result.input = value.input;\n    }\n  }\n  // exit for shallow clone\n  if (!isDeep) {\n    return result;\n  }\n  // add the source value to the stack of traversed objects\n  // and associate it with its clone\n  stackA.push(value);\n  stackB.push(result);\n\n  // recursively populate clone (susceptible to call stack limits)\n  (isArr ? forEach : forOwn)(value, function(objValue, key) {\n    result[key] = baseClone(objValue, isDeep, callback, stackA, stackB);\n  });\n\n  if (initedStack) {\n    releaseArray(stackA);\n    releaseArray(stackB);\n  }\n  return result;\n}\n\nmodule.exports = baseClone;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar isNative = require('lodash._isnative'),\n    isObject = require('lodash.isobject'),\n    noop = require('lodash.noop');\n\n/* Native method shortcuts for methods with the same name as other `lodash` methods */\nvar nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate;\n\n/**\n * The base implementation of `_.create` without support for assigning\n * properties to the created object.\n *\n * @private\n * @param {Object} prototype The object to inherit from.\n * @returns {Object} Returns the new object.\n */\nfunction baseCreate(prototype, properties) {\n  return isObject(prototype) ? nativeCreate(prototype) : {};\n}\n// fallback for browsers without `Object.create`\nif (!nativeCreate) {\n  baseCreate = (function() {\n    function Object() {}\n    return function(prototype) {\n      if (isObject(prototype)) {\n        Object.prototype = prototype;\n        var result = new Object;\n        Object.prototype = null;\n      }\n      return result || global.Object();\n    };\n  }());\n}\n\nmodule.exports = baseCreate;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar bind = require('lodash.bind'),\n    identity = require('lodash.identity'),\n    setBindData = require('lodash._setbinddata'),\n    support = require('lodash.support');\n\n/** Used to detected named functions */\nvar reFuncName = /^\\s*function[ \\n\\r\\t]+\\w/;\n\n/** Used to detect functions containing a `this` reference */\nvar reThis = /\\bthis\\b/;\n\n/** Native method shortcuts */\nvar fnToString = Function.prototype.toString;\n\n/**\n * The base implementation of `_.createCallback` without support for creating\n * \"_.pluck\" or \"_.where\" style callbacks.\n *\n * @private\n * @param {*} [func=identity] The value to convert to a callback.\n * @param {*} [thisArg] The `this` binding of the created callback.\n * @param {number} [argCount] The number of arguments the callback accepts.\n * @returns {Function} Returns a callback function.\n */\nfunction baseCreateCallback(func, thisArg, argCount) {\n  if (typeof func != 'function') {\n    return identity;\n  }\n  // exit early for no `thisArg` or already bound by `Function#bind`\n  if (typeof thisArg == 'undefined' || !('prototype' in func)) {\n    return func;\n  }\n  var bindData = func.__bindData__;\n  if (typeof bindData == 'undefined') {\n    if (support.funcNames) {\n      bindData = !func.name;\n    }\n    bindData = bindData || !support.funcDecomp;\n    if (!bindData) {\n      var source = fnToString.call(func);\n      if (!support.funcNames) {\n        bindData = !reFuncName.test(source);\n      }\n      if (!bindData) {\n        // checks if `func` references the `this` keyword and stores the result\n        bindData = reThis.test(source);\n        setBindData(func, bindData);\n      }\n    }\n  }\n  // exit early if there are no `this` references or `func` is bound\n  if (bindData === false || (bindData !== true && bindData[1] & 1)) {\n    return func;\n  }\n  switch (argCount) {\n    case 1: return function(value) {\n      return func.call(thisArg, value);\n    };\n    case 2: return function(a, b) {\n      return func.call(thisArg, a, b);\n    };\n    case 3: return function(value, index, collection) {\n      return func.call(thisArg, value, index, collection);\n    };\n    case 4: return function(accumulator, value, index, collection) {\n      return func.call(thisArg, accumulator, value, index, collection);\n    };\n  }\n  return bind(func, thisArg);\n}\n\nmodule.exports = baseCreateCallback;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar baseCreate = require('lodash._basecreate'),\n    isObject = require('lodash.isobject'),\n    setBindData = require('lodash._setbinddata'),\n    slice = require('lodash._slice');\n\n/**\n * Used for `Array` method references.\n *\n * Normally `Array.prototype` would suffice, however, using an array literal\n * avoids issues in Narwhal.\n */\nvar arrayRef = [];\n\n/** Native method shortcuts */\nvar push = arrayRef.push;\n\n/**\n * The base implementation of `createWrapper` that creates the wrapper and\n * sets its meta data.\n *\n * @private\n * @param {Array} bindData The bind data array.\n * @returns {Function} Returns the new function.\n */\nfunction baseCreateWrapper(bindData) {\n  var func = bindData[0],\n      bitmask = bindData[1],\n      partialArgs = bindData[2],\n      partialRightArgs = bindData[3],\n      thisArg = bindData[4],\n      arity = bindData[5];\n\n  var isBind = bitmask & 1,\n      isBindKey = bitmask & 2,\n      isCurry = bitmask & 4,\n      isCurryBound = bitmask & 8,\n      key = func;\n\n  function bound() {\n    var thisBinding = isBind ? thisArg : this;\n    if (partialArgs) {\n      var args = slice(partialArgs);\n      push.apply(args, arguments);\n    }\n    if (partialRightArgs || isCurry) {\n      args || (args = slice(arguments));\n      if (partialRightArgs) {\n        push.apply(args, partialRightArgs);\n      }\n      if (isCurry && args.length < arity) {\n        bitmask |= 16 & ~32;\n        return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);\n      }\n    }\n    args || (args = arguments);\n    if (isBindKey) {\n      func = thisBinding[key];\n    }\n    if (this instanceof bound) {\n      thisBinding = baseCreate(func.prototype);\n      var result = func.apply(thisBinding, args);\n      return isObject(result) ? result : thisBinding;\n    }\n    return func.apply(thisBinding, args);\n  }\n  setBindData(bound, bindData);\n  return bound;\n}\n\nmodule.exports = baseCreateWrapper;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar baseBind = require('lodash._basebind'),\n    baseCreateWrapper = require('lodash._basecreatewrapper'),\n    isFunction = require('lodash.isfunction'),\n    slice = require('lodash._slice');\n\n/**\n * Used for `Array` method references.\n *\n * Normally `Array.prototype` would suffice, however, using an array literal\n * avoids issues in Narwhal.\n */\nvar arrayRef = [];\n\n/** Native method shortcuts */\nvar push = arrayRef.push,\n    unshift = arrayRef.unshift;\n\n/**\n * Creates a function that, when called, either curries or invokes `func`\n * with an optional `this` binding and partially applied arguments.\n *\n * @private\n * @param {Function|string} func The function or method name to reference.\n * @param {number} bitmask The bitmask of method flags to compose.\n *  The bitmask may be composed of the following flags:\n *  1 - `_.bind`\n *  2 - `_.bindKey`\n *  4 - `_.curry`\n *  8 - `_.curry` (bound)\n *  16 - `_.partial`\n *  32 - `_.partialRight`\n * @param {Array} [partialArgs] An array of arguments to prepend to those\n *  provided to the new function.\n * @param {Array} [partialRightArgs] An array of arguments to append to those\n *  provided to the new function.\n * @param {*} [thisArg] The `this` binding of `func`.\n * @param {number} [arity] The arity of `func`.\n * @returns {Function} Returns the new function.\n */\nfunction createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {\n  var isBind = bitmask & 1,\n      isBindKey = bitmask & 2,\n      isCurry = bitmask & 4,\n      isCurryBound = bitmask & 8,\n      isPartial = bitmask & 16,\n      isPartialRight = bitmask & 32;\n\n  if (!isBindKey && !isFunction(func)) {\n    throw new TypeError;\n  }\n  if (isPartial && !partialArgs.length) {\n    bitmask &= ~16;\n    isPartial = partialArgs = false;\n  }\n  if (isPartialRight && !partialRightArgs.length) {\n    bitmask &= ~32;\n    isPartialRight = partialRightArgs = false;\n  }\n  var bindData = func && func.__bindData__;\n  if (bindData && bindData !== true) {\n    // clone `bindData`\n    bindData = slice(bindData);\n    if (bindData[2]) {\n      bindData[2] = slice(bindData[2]);\n    }\n    if (bindData[3]) {\n      bindData[3] = slice(bindData[3]);\n    }\n    // set `thisBinding` is not previously bound\n    if (isBind && !(bindData[1] & 1)) {\n      bindData[4] = thisArg;\n    }\n    // set if previously bound but not currently (subsequent curried functions)\n    if (!isBind && bindData[1] & 1) {\n      bitmask |= 8;\n    }\n    // set curried arity if not yet set\n    if (isCurry && !(bindData[1] & 4)) {\n      bindData[5] = arity;\n    }\n    // append partial left arguments\n    if (isPartial) {\n      push.apply(bindData[2] || (bindData[2] = []), partialArgs);\n    }\n    // append partial right arguments\n    if (isPartialRight) {\n      unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs);\n    }\n    // merge flags\n    bindData[1] |= bitmask;\n    return createWrapper.apply(null, bindData);\n  }\n  // fast path for `_.bind`\n  var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;\n  return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);\n}\n\nmodule.exports = createWrapper;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar arrayPool = require('lodash._arraypool');\n\n/**\n * Gets an array from the array pool or creates a new one if the pool is empty.\n *\n * @private\n * @returns {Array} The array from the pool.\n */\nfunction getArray() {\n  return arrayPool.pop() || [];\n}\n\nmodule.exports = getArray;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/** Used for native method references */\nvar objectProto = Object.prototype;\n\n/** Used to resolve the internal [[Class]] of values */\nvar toString = objectProto.toString;\n\n/** Used to detect if a method is native */\nvar reNative = RegExp('^' +\n  String(toString)\n    .replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\$&')\n    .replace(/toString| for [^\\]]+/g, '.*?') + '$'\n);\n\n/**\n * Checks if `value` is a native function.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if the `value` is a native function, else `false`.\n */\nfunction isNative(value) {\n  return typeof value == 'function' && reNative.test(value);\n}\n\nmodule.exports = isNative;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/** Used as the max size of the `arrayPool` and `objectPool` */\nvar maxPoolSize = 40;\n\nmodule.exports = maxPoolSize;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/** Used to determine if values are of the language type Object */\nvar objectTypes = {\n  'boolean': false,\n  'function': true,\n  'object': true,\n  'number': false,\n  'string': false,\n  'undefined': false\n};\n\nmodule.exports = objectTypes;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar arrayPool = require('lodash._arraypool'),\n    maxPoolSize = require('lodash._maxpoolsize');\n\n/**\n * Releases the given array back to the array pool.\n *\n * @private\n * @param {Array} [array] The array to release.\n */\nfunction releaseArray(array) {\n  array.length = 0;\n  if (arrayPool.length < maxPoolSize) {\n    arrayPool.push(array);\n  }\n}\n\nmodule.exports = releaseArray;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar isNative = require('lodash._isnative'),\n    noop = require('lodash.noop');\n\n/** Used as the property descriptor for `__bindData__` */\nvar descriptor = {\n  'configurable': false,\n  'enumerable': false,\n  'value': null,\n  'writable': false\n};\n\n/** Used to set meta data on functions */\nvar defineProperty = (function() {\n  // IE 8 only accepts DOM elements\n  try {\n    var o = {},\n        func = isNative(func = Object.defineProperty) && func,\n        result = func(o, o, o) && func;\n  } catch(e) { }\n  return result;\n}());\n\n/**\n * Sets `this` binding data on a given function.\n *\n * @private\n * @param {Function} func The function to set data on.\n * @param {Array} value The data array to set.\n */\nvar setBindData = !defineProperty ? noop : function(func, value) {\n  descriptor.value = value;\n  defineProperty(func, '__bindData__', descriptor);\n};\n\nmodule.exports = setBindData;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar objectTypes = require('lodash._objecttypes');\n\n/** Used for native method references */\nvar objectProto = Object.prototype;\n\n/** Native method shortcuts */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A fallback implementation of `Object.keys` which produces an array of the\n * given object's own enumerable property names.\n *\n * @private\n * @type Function\n * @param {Object} object The object to inspect.\n * @returns {Array} Returns an array of property names.\n */\nvar shimKeys = function(object) {\n  var index, iterable = object, result = [];\n  if (!iterable) return result;\n  if (!(objectTypes[typeof object])) return result;\n    for (index in iterable) {\n      if (hasOwnProperty.call(iterable, index)) {\n        result.push(index);\n      }\n    }\n  return result\n};\n\nmodule.exports = shimKeys;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/**\n * Slices the `collection` from the `start` index up to, but not including,\n * the `end` index.\n *\n * Note: This function is used instead of `Array#slice` to support node lists\n * in IE < 9 and to ensure dense arrays are returned.\n *\n * @private\n * @param {Array|Object|string} collection The collection to slice.\n * @param {number} start The start index.\n * @param {number} end The end index.\n * @returns {Array} Returns the new array.\n */\nfunction slice(array, start, end) {\n  start || (start = 0);\n  if (typeof end == 'undefined') {\n    end = array ? array.length : 0;\n  }\n  var index = -1,\n      length = end - start || 0,\n      result = Array(length < 0 ? 0 : length);\n\n  while (++index < length) {\n    result[index] = array[start + index];\n  }\n  return result;\n}\n\nmodule.exports = slice;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar baseCreateCallback = require('lodash._basecreatecallback'),\n    keys = require('lodash.keys'),\n    objectTypes = require('lodash._objecttypes');\n\n/**\n * Assigns own enumerable properties of source object(s) to the destination\n * object. Subsequent sources will overwrite property assignments of previous\n * sources. If a callback is provided it will be executed to produce the\n * assigned values. The callback is bound to `thisArg` and invoked with two\n * arguments; (objectValue, sourceValue).\n *\n * @static\n * @memberOf _\n * @type Function\n * @alias extend\n * @category Objects\n * @param {Object} object The destination object.\n * @param {...Object} [source] The source objects.\n * @param {Function} [callback] The function to customize assigning values.\n * @param {*} [thisArg] The `this` binding of `callback`.\n * @returns {Object} Returns the destination object.\n * @example\n *\n * _.assign({ 'name': 'fred' }, { 'employer': 'slate' });\n * // => { 'name': 'fred', 'employer': 'slate' }\n *\n * var defaults = _.partialRight(_.assign, function(a, b) {\n *   return typeof a == 'undefined' ? b : a;\n * });\n *\n * var object = { 'name': 'barney' };\n * defaults(object, { 'name': 'fred', 'employer': 'slate' });\n * // => { 'name': 'barney', 'employer': 'slate' }\n */\nvar assign = function(object, source, guard) {\n  var index, iterable = object, result = iterable;\n  if (!iterable) return result;\n  var args = arguments,\n      argsIndex = 0,\n      argsLength = typeof guard == 'number' ? 2 : args.length;\n  if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {\n    var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);\n  } else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {\n    callback = args[--argsLength];\n  }\n  while (++argsIndex < argsLength) {\n    iterable = args[argsIndex];\n    if (iterable && objectTypes[typeof iterable]) {\n    var ownIndex = -1,\n        ownProps = objectTypes[typeof iterable] && keys(iterable),\n        length = ownProps ? ownProps.length : 0;\n\n    while (++ownIndex < length) {\n      index = ownProps[ownIndex];\n      result[index] = callback ? callback(result[index], iterable[index]) : iterable[index];\n    }\n    }\n  }\n  return result\n};\n\nmodule.exports = assign;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar createWrapper = require('lodash._createwrapper'),\n    slice = require('lodash._slice');\n\n/**\n * Creates a function that, when called, invokes `func` with the `this`\n * binding of `thisArg` and prepends any additional `bind` arguments to those\n * provided to the bound function.\n *\n * @static\n * @memberOf _\n * @category Functions\n * @param {Function} func The function to bind.\n * @param {*} [thisArg] The `this` binding of `func`.\n * @param {...*} [arg] Arguments to be partially applied.\n * @returns {Function} Returns the new bound function.\n * @example\n *\n * var func = function(greeting) {\n *   return greeting + ' ' + this.name;\n * };\n *\n * func = _.bind(func, { 'name': 'fred' }, 'hi');\n * func();\n * // => 'hi fred'\n */\nfunction bind(func, thisArg) {\n  return arguments.length > 2\n    ? createWrapper(func, 17, slice(arguments, 2), null, thisArg)\n    : createWrapper(func, 1, null, null, thisArg);\n}\n\nmodule.exports = bind;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar baseClone = require('lodash._baseclone'),\n    baseCreateCallback = require('lodash._basecreatecallback');\n\n/**\n * Creates a deep clone of `value`. If a callback is provided it will be\n * executed to produce the cloned values. If the callback returns `undefined`\n * cloning will be handled by the method instead. The callback is bound to\n * `thisArg` and invoked with one argument; (value).\n *\n * Note: This method is loosely based on the structured clone algorithm. Functions\n * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and\n * objects created by constructors other than `Object` are cloned to plain `Object` objects.\n * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.\n *\n * @static\n * @memberOf _\n * @category Objects\n * @param {*} value The value to deep clone.\n * @param {Function} [callback] The function to customize cloning values.\n * @param {*} [thisArg] The `this` binding of `callback`.\n * @returns {*} Returns the deep cloned value.\n * @example\n *\n * var characters = [\n *   { 'name': 'barney', 'age': 36 },\n *   { 'name': 'fred',   'age': 40 }\n * ];\n *\n * var deep = _.cloneDeep(characters);\n * deep[0] === characters[0];\n * // => false\n *\n * var view = {\n *   'label': 'docs',\n *   'node': element\n * };\n *\n * var clone = _.cloneDeep(view, function(value) {\n *   return _.isElement(value) ? value.cloneNode(true) : undefined;\n * });\n *\n * clone.node == view.node;\n * // => false\n */\nfunction cloneDeep(value, callback, thisArg) {\n  return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));\n}\n\nmodule.exports = cloneDeep;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar baseCreateCallback = require('lodash._basecreatecallback'),\n    forOwn = require('lodash.forown');\n\n/**\n * Iterates over elements of a collection, executing the callback for each\n * element. The callback is bound to `thisArg` and invoked with three arguments;\n * (value, index|key, collection). Callbacks may exit iteration early by\n * explicitly returning `false`.\n *\n * Note: As with other \"Collections\" methods, objects with a `length` property\n * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`\n * may be used for object iteration.\n *\n * @static\n * @memberOf _\n * @alias each\n * @category Collections\n * @param {Array|Object|string} collection The collection to iterate over.\n * @param {Function} [callback=identity] The function called per iteration.\n * @param {*} [thisArg] The `this` binding of `callback`.\n * @returns {Array|Object|string} Returns `collection`.\n * @example\n *\n * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(',');\n * // => logs each number and returns '1,2,3'\n *\n * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); });\n * // => logs each number and returns the object (property order is not guaranteed across environments)\n */\nfunction forEach(collection, callback, thisArg) {\n  var index = -1,\n      length = collection ? collection.length : 0;\n\n  callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);\n  if (typeof length == 'number') {\n    while (++index < length) {\n      if (callback(collection[index], index, collection) === false) {\n        break;\n      }\n    }\n  } else {\n    forOwn(collection, callback);\n  }\n  return collection;\n}\n\nmodule.exports = forEach;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar baseCreateCallback = require('lodash._basecreatecallback'),\n    keys = require('lodash.keys'),\n    objectTypes = require('lodash._objecttypes');\n\n/**\n * Iterates over own enumerable properties of an object, executing the callback\n * for each property. The callback is bound to `thisArg` and invoked with three\n * arguments; (value, key, object). Callbacks may exit iteration early by\n * explicitly returning `false`.\n *\n * @static\n * @memberOf _\n * @type Function\n * @category Objects\n * @param {Object} object The object to iterate over.\n * @param {Function} [callback=identity] The function called per iteration.\n * @param {*} [thisArg] The `this` binding of `callback`.\n * @returns {Object} Returns `object`.\n * @example\n *\n * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {\n *   console.log(key);\n * });\n * // => logs '0', '1', and 'length' (property order is not guaranteed across environments)\n */\nvar forOwn = function(collection, callback, thisArg) {\n  var index, iterable = collection, result = iterable;\n  if (!iterable) return result;\n  if (!objectTypes[typeof iterable]) return result;\n  callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);\n    var ownIndex = -1,\n        ownProps = objectTypes[typeof iterable] && keys(iterable),\n        length = ownProps ? ownProps.length : 0;\n\n    while (++ownIndex < length) {\n      index = ownProps[ownIndex];\n      if (callback(iterable[index], index, collection) === false) return result;\n    }\n  return result\n};\n\nmodule.exports = forOwn;\n","/**\n * lodash (Custom Build) <https://lodash.com/>\n * Build: `lodash modularize exports=\"npm\" -o ./`\n * Copyright jQuery Foundation and other contributors <https://jquery.org/>\n * Released under MIT license <https://lodash.com/license>\n * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>\n * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n */\n\n/** Used as the `TypeError` message for \"Functions\" methods. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/** Used as references for various `Number` constants. */\nvar INFINITY = 1 / 0;\n\n/** `Object#toString` result references. */\nvar funcTag = '[object Function]',\n    genTag = '[object GeneratorFunction]',\n    symbolTag = '[object Symbol]';\n\n/** Used to match property names within property paths. */\nvar reIsDeepProp = /\\.|\\[(?:[^[\\]]*|([\"'])(?:(?!\\1)[^\\\\]|\\\\.)*?\\1)\\]/,\n    reIsPlainProp = /^\\w*$/,\n    reLeadingDot = /^\\./,\n    rePropName = /[^.[\\]]+|\\[(?:(-?\\d+(?:\\.\\d+)?)|([\"'])((?:(?!\\2)[^\\\\]|\\\\.)*?)\\2)\\]|(?=(?:\\.|\\[\\])(?:\\.|\\[\\]|$))/g;\n\n/**\n * Used to match `RegExp`\n * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).\n */\nvar reRegExpChar = /[\\\\^$.*+?()[\\]{}|]/g;\n\n/** Used to match backslashes in property paths. */\nvar reEscapeChar = /\\\\(\\\\)?/g;\n\n/** Used to detect host constructors (Safari). */\nvar reIsHostCtor = /^\\[object .+?Constructor\\]$/;\n\n/** Detect free variable `global` from Node.js. */\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\n/**\n * Gets the value at `key` of `object`.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {string} key The key of the property to get.\n * @returns {*} Returns the property value.\n */\nfunction getValue(object, key) {\n  return object == null ? undefined : object[key];\n}\n\n/**\n * Checks if `value` is a host object in IE < 9.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a host object, else `false`.\n */\nfunction isHostObject(value) {\n  // Many host objects are `Object` objects that can coerce to strings\n  // despite having improperly defined `toString` methods.\n  var result = false;\n  if (value != null && typeof value.toString != 'function') {\n    try {\n      result = !!(value + '');\n    } catch (e) {}\n  }\n  return result;\n}\n\n/** Used for built-in method references. */\nvar arrayProto = Array.prototype,\n    funcProto = Function.prototype,\n    objectProto = Object.prototype;\n\n/** Used to detect overreaching core-js shims. */\nvar coreJsData = root['__core-js_shared__'];\n\n/** Used to detect methods masquerading as native. */\nvar maskSrcKey = (function() {\n  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');\n  return uid ? ('Symbol(src)_1.' + uid) : '';\n}());\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar objectToString = objectProto.toString;\n\n/** Used to detect if a method is native. */\nvar reIsNative = RegExp('^' +\n  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\\\$&')\n  .replace(/hasOwnProperty|(function).*?(?=\\\\\\()| for .+?(?=\\\\\\])/g, '$1.*?') + '$'\n);\n\n/** Built-in value references. */\nvar Symbol = root.Symbol,\n    splice = arrayProto.splice;\n\n/* Built-in method references that are verified to be native. */\nvar Map = getNative(root, 'Map'),\n    nativeCreate = getNative(Object, 'create');\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n    symbolToString = symbolProto ? symbolProto.toString : undefined;\n\n/**\n * Creates a hash object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Hash(entries) {\n  var index = -1,\n      length = entries ? entries.length : 0;\n\n  this.clear();\n  while (++index < length) {\n    var entry = entries[index];\n    this.set(entry[0], entry[1]);\n  }\n}\n\n/**\n * Removes all key-value entries from the hash.\n *\n * @private\n * @name clear\n * @memberOf Hash\n */\nfunction hashClear() {\n  this.__data__ = nativeCreate ? nativeCreate(null) : {};\n}\n\n/**\n * Removes `key` and its value from the hash.\n *\n * @private\n * @name delete\n * @memberOf Hash\n * @param {Object} hash The hash to modify.\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction hashDelete(key) {\n  return this.has(key) && delete this.__data__[key];\n}\n\n/**\n * Gets the hash value for `key`.\n *\n * @private\n * @name get\n * @memberOf Hash\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction hashGet(key) {\n  var data = this.__data__;\n  if (nativeCreate) {\n    var result = data[key];\n    return result === HASH_UNDEFINED ? undefined : result;\n  }\n  return hasOwnProperty.call(data, key) ? data[key] : undefined;\n}\n\n/**\n * Checks if a hash value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Hash\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction hashHas(key) {\n  var data = this.__data__;\n  return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);\n}\n\n/**\n * Sets the hash `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Hash\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the hash instance.\n */\nfunction hashSet(key, value) {\n  var data = this.__data__;\n  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;\n  return this;\n}\n\n// Add methods to `Hash`.\nHash.prototype.clear = hashClear;\nHash.prototype['delete'] = hashDelete;\nHash.prototype.get = hashGet;\nHash.prototype.has = hashHas;\nHash.prototype.set = hashSet;\n\n/**\n * Creates an list cache object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction ListCache(entries) {\n  var index = -1,\n      length = entries ? entries.length : 0;\n\n  this.clear();\n  while (++index < length) {\n    var entry = entries[index];\n    this.set(entry[0], entry[1]);\n  }\n}\n\n/**\n * Removes all key-value entries from the list cache.\n *\n * @private\n * @name clear\n * @memberOf ListCache\n */\nfunction listCacheClear() {\n  this.__data__ = [];\n}\n\n/**\n * Removes `key` and its value from the list cache.\n *\n * @private\n * @name delete\n * @memberOf ListCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction listCacheDelete(key) {\n  var data = this.__data__,\n      index = assocIndexOf(data, key);\n\n  if (index < 0) {\n    return false;\n  }\n  var lastIndex = data.length - 1;\n  if (index == lastIndex) {\n    data.pop();\n  } else {\n    splice.call(data, index, 1);\n  }\n  return true;\n}\n\n/**\n * Gets the list cache value for `key`.\n *\n * @private\n * @name get\n * @memberOf ListCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction listCacheGet(key) {\n  var data = this.__data__,\n      index = assocIndexOf(data, key);\n\n  return index < 0 ? undefined : data[index][1];\n}\n\n/**\n * Checks if a list cache value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf ListCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction listCacheHas(key) {\n  return assocIndexOf(this.__data__, key) > -1;\n}\n\n/**\n * Sets the list cache `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf ListCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the list cache instance.\n */\nfunction listCacheSet(key, value) {\n  var data = this.__data__,\n      index = assocIndexOf(data, key);\n\n  if (index < 0) {\n    data.push([key, value]);\n  } else {\n    data[index][1] = value;\n  }\n  return this;\n}\n\n// Add methods to `ListCache`.\nListCache.prototype.clear = listCacheClear;\nListCache.prototype['delete'] = listCacheDelete;\nListCache.prototype.get = listCacheGet;\nListCache.prototype.has = listCacheHas;\nListCache.prototype.set = listCacheSet;\n\n/**\n * Creates a map cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction MapCache(entries) {\n  var index = -1,\n      length = entries ? entries.length : 0;\n\n  this.clear();\n  while (++index < length) {\n    var entry = entries[index];\n    this.set(entry[0], entry[1]);\n  }\n}\n\n/**\n * Removes all key-value entries from the map.\n *\n * @private\n * @name clear\n * @memberOf MapCache\n */\nfunction mapCacheClear() {\n  this.__data__ = {\n    'hash': new Hash,\n    'map': new (Map || ListCache),\n    'string': new Hash\n  };\n}\n\n/**\n * Removes `key` and its value from the map.\n *\n * @private\n * @name delete\n * @memberOf MapCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction mapCacheDelete(key) {\n  return getMapData(this, key)['delete'](key);\n}\n\n/**\n * Gets the map value for `key`.\n *\n * @private\n * @name get\n * @memberOf MapCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction mapCacheGet(key) {\n  return getMapData(this, key).get(key);\n}\n\n/**\n * Checks if a map value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf MapCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction mapCacheHas(key) {\n  return getMapData(this, key).has(key);\n}\n\n/**\n * Sets the map `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf MapCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the map cache instance.\n */\nfunction mapCacheSet(key, value) {\n  getMapData(this, key).set(key, value);\n  return this;\n}\n\n// Add methods to `MapCache`.\nMapCache.prototype.clear = mapCacheClear;\nMapCache.prototype['delete'] = mapCacheDelete;\nMapCache.prototype.get = mapCacheGet;\nMapCache.prototype.has = mapCacheHas;\nMapCache.prototype.set = mapCacheSet;\n\n/**\n * Gets the index at which the `key` is found in `array` of key-value pairs.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} key The key to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction assocIndexOf(array, key) {\n  var length = array.length;\n  while (length--) {\n    if (eq(array[length][0], key)) {\n      return length;\n    }\n  }\n  return -1;\n}\n\n/**\n * The base implementation of `_.get` without support for default values.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the property to get.\n * @returns {*} Returns the resolved value.\n */\nfunction baseGet(object, path) {\n  path = isKey(path, object) ? [path] : castPath(path);\n\n  var index = 0,\n      length = path.length;\n\n  while (object != null && index < length) {\n    object = object[toKey(path[index++])];\n  }\n  return (index && index == length) ? object : undefined;\n}\n\n/**\n * The base implementation of `_.isNative` without bad shim checks.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n *  else `false`.\n */\nfunction baseIsNative(value) {\n  if (!isObject(value) || isMasked(value)) {\n    return false;\n  }\n  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;\n  return pattern.test(toSource(value));\n}\n\n/**\n * The base implementation of `_.toString` which doesn't convert nullish\n * values to empty strings.\n *\n * @private\n * @param {*} value The value to process.\n * @returns {string} Returns the string.\n */\nfunction baseToString(value) {\n  // Exit early for strings to avoid a performance hit in some environments.\n  if (typeof value == 'string') {\n    return value;\n  }\n  if (isSymbol(value)) {\n    return symbolToString ? symbolToString.call(value) : '';\n  }\n  var result = (value + '');\n  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n}\n\n/**\n * Casts `value` to a path array if it's not one.\n *\n * @private\n * @param {*} value The value to inspect.\n * @returns {Array} Returns the cast property path array.\n */\nfunction castPath(value) {\n  return isArray(value) ? value : stringToPath(value);\n}\n\n/**\n * Gets the data for `map`.\n *\n * @private\n * @param {Object} map The map to query.\n * @param {string} key The reference key.\n * @returns {*} Returns the map data.\n */\nfunction getMapData(map, key) {\n  var data = map.__data__;\n  return isKeyable(key)\n    ? data[typeof key == 'string' ? 'string' : 'hash']\n    : data.map;\n}\n\n/**\n * Gets the native function at `key` of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {string} key The key of the method to get.\n * @returns {*} Returns the function if it's native, else `undefined`.\n */\nfunction getNative(object, key) {\n  var value = getValue(object, key);\n  return baseIsNative(value) ? value : undefined;\n}\n\n/**\n * Checks if `value` is a property name and not a property path.\n *\n * @private\n * @param {*} value The value to check.\n * @param {Object} [object] The object to query keys on.\n * @returns {boolean} Returns `true` if `value` is a property name, else `false`.\n */\nfunction isKey(value, object) {\n  if (isArray(value)) {\n    return false;\n  }\n  var type = typeof value;\n  if (type == 'number' || type == 'symbol' || type == 'boolean' ||\n      value == null || isSymbol(value)) {\n    return true;\n  }\n  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||\n    (object != null && value in Object(object));\n}\n\n/**\n * Checks if `value` is suitable for use as unique object key.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is suitable, else `false`.\n */\nfunction isKeyable(value) {\n  var type = typeof value;\n  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')\n    ? (value !== '__proto__')\n    : (value === null);\n}\n\n/**\n * Checks if `func` has its source masked.\n *\n * @private\n * @param {Function} func The function to check.\n * @returns {boolean} Returns `true` if `func` is masked, else `false`.\n */\nfunction isMasked(func) {\n  return !!maskSrcKey && (maskSrcKey in func);\n}\n\n/**\n * Converts `string` to a property path array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the property path array.\n */\nvar stringToPath = memoize(function(string) {\n  string = toString(string);\n\n  var result = [];\n  if (reLeadingDot.test(string)) {\n    result.push('');\n  }\n  string.replace(rePropName, function(match, number, quote, string) {\n    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));\n  });\n  return result;\n});\n\n/**\n * Converts `value` to a string key if it's not a string or symbol.\n *\n * @private\n * @param {*} value The value to inspect.\n * @returns {string|symbol} Returns the key.\n */\nfunction toKey(value) {\n  if (typeof value == 'string' || isSymbol(value)) {\n    return value;\n  }\n  var result = (value + '');\n  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n}\n\n/**\n * Converts `func` to its source code.\n *\n * @private\n * @param {Function} func The function to process.\n * @returns {string} Returns the source code.\n */\nfunction toSource(func) {\n  if (func != null) {\n    try {\n      return funcToString.call(func);\n    } catch (e) {}\n    try {\n      return (func + '');\n    } catch (e) {}\n  }\n  return '';\n}\n\n/**\n * Creates a function that memoizes the result of `func`. If `resolver` is\n * provided, it determines the cache key for storing the result based on the\n * arguments provided to the memoized function. By default, the first argument\n * provided to the memoized function is used as the map cache key. The `func`\n * is invoked with the `this` binding of the memoized function.\n *\n * **Note:** The cache is exposed as the `cache` property on the memoized\n * function. Its creation may be customized by replacing the `_.memoize.Cache`\n * constructor with one whose instances implement the\n * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)\n * method interface of `delete`, `get`, `has`, and `set`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to have its output memoized.\n * @param {Function} [resolver] The function to resolve the cache key.\n * @returns {Function} Returns the new memoized function.\n * @example\n *\n * var object = { 'a': 1, 'b': 2 };\n * var other = { 'c': 3, 'd': 4 };\n *\n * var values = _.memoize(_.values);\n * values(object);\n * // => [1, 2]\n *\n * values(other);\n * // => [3, 4]\n *\n * object.a = 2;\n * values(object);\n * // => [1, 2]\n *\n * // Modify the result cache.\n * values.cache.set(object, ['a', 'b']);\n * values(object);\n * // => ['a', 'b']\n *\n * // Replace `_.memoize.Cache`.\n * _.memoize.Cache = WeakMap;\n */\nfunction memoize(func, resolver) {\n  if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {\n    throw new TypeError(FUNC_ERROR_TEXT);\n  }\n  var memoized = function() {\n    var args = arguments,\n        key = resolver ? resolver.apply(this, args) : args[0],\n        cache = memoized.cache;\n\n    if (cache.has(key)) {\n      return cache.get(key);\n    }\n    var result = func.apply(this, args);\n    memoized.cache = cache.set(key, result);\n    return result;\n  };\n  memoized.cache = new (memoize.Cache || MapCache);\n  return memoized;\n}\n\n// Assign cache to `_.memoize`.\nmemoize.Cache = MapCache;\n\n/**\n * Performs a\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * comparison between two values to determine if they are equivalent.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.eq(object, object);\n * // => true\n *\n * _.eq(object, other);\n * // => false\n *\n * _.eq('a', 'a');\n * // => true\n *\n * _.eq('a', Object('a'));\n * // => false\n *\n * _.eq(NaN, NaN);\n * // => true\n */\nfunction eq(value, other) {\n  return value === other || (value !== value && other !== other);\n}\n\n/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\n/**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\nfunction isFunction(value) {\n  // The use of `Object#toString` avoids issues with the `typeof` operator\n  // in Safari 8-9 which returns 'object' for typed array and other constructors.\n  var tag = isObject(value) ? objectToString.call(value) : '';\n  return tag == funcTag || tag == genTag;\n}\n\n/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n  var type = typeof value;\n  return !!value && (type == 'object' || type == 'function');\n}\n\n/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n  return !!value && typeof value == 'object';\n}\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n  return typeof value == 'symbol' ||\n    (isObjectLike(value) && objectToString.call(value) == symbolTag);\n}\n\n/**\n * Converts `value` to a string. An empty string is returned for `null`\n * and `undefined` values. The sign of `-0` is preserved.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {string} Returns the string.\n * @example\n *\n * _.toString(null);\n * // => ''\n *\n * _.toString(-0);\n * // => '-0'\n *\n * _.toString([1, 2, 3]);\n * // => '1,2,3'\n */\nfunction toString(value) {\n  return value == null ? '' : baseToString(value);\n}\n\n/**\n * Gets the value at `path` of `object`. If the resolved value is\n * `undefined`, the `defaultValue` is returned in its place.\n *\n * @static\n * @memberOf _\n * @since 3.7.0\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the property to get.\n * @param {*} [defaultValue] The value returned for `undefined` resolved values.\n * @returns {*} Returns the resolved value.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n *\n * _.get(object, 'a[0].b.c');\n * // => 3\n *\n * _.get(object, ['a', '0', 'b', 'c']);\n * // => 3\n *\n * _.get(object, 'a.b.c', 'default');\n * // => 'default'\n */\nfunction get(object, path, defaultValue) {\n  var result = object == null ? undefined : baseGet(object, path);\n  return result === undefined ? defaultValue : result;\n}\n\nmodule.exports = get;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/**\n * This method returns the first argument provided to it.\n *\n * @static\n * @memberOf _\n * @category Utilities\n * @param {*} value Any value.\n * @returns {*} Returns `value`.\n * @example\n *\n * var object = { 'name': 'fred' };\n * _.identity(object) === object;\n * // => true\n */\nfunction identity(value) {\n  return value;\n}\n\nmodule.exports = identity;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar isNative = require('lodash._isnative');\n\n/** `Object#toString` result shortcuts */\nvar arrayClass = '[object Array]';\n\n/** Used for native method references */\nvar objectProto = Object.prototype;\n\n/** Used to resolve the internal [[Class]] of values */\nvar toString = objectProto.toString;\n\n/* Native method shortcuts for methods with the same name as other `lodash` methods */\nvar nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray;\n\n/**\n * Checks if `value` is an array.\n *\n * @static\n * @memberOf _\n * @type Function\n * @category Objects\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if the `value` is an array, else `false`.\n * @example\n *\n * (function() { return _.isArray(arguments); })();\n * // => false\n *\n * _.isArray([1, 2, 3]);\n * // => true\n */\nvar isArray = nativeIsArray || function(value) {\n  return value && typeof value == 'object' && typeof value.length == 'number' &&\n    toString.call(value) == arrayClass || false;\n};\n\nmodule.exports = isArray;\n","/**\n * Lodash (Custom Build) <https://lodash.com/>\n * Build: `lodash modularize exports=\"npm\" -o ./`\n * Copyright JS Foundation and other contributors <https://js.foundation/>\n * Released under MIT license <https://lodash.com/license>\n * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>\n * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n */\n\n/** Used as the size to enable large array optimizations. */\nvar LARGE_ARRAY_SIZE = 200;\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n    COMPARE_UNORDERED_FLAG = 2;\n\n/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n    arrayTag = '[object Array]',\n    asyncTag = '[object AsyncFunction]',\n    boolTag = '[object Boolean]',\n    dateTag = '[object Date]',\n    errorTag = '[object Error]',\n    funcTag = '[object Function]',\n    genTag = '[object GeneratorFunction]',\n    mapTag = '[object Map]',\n    numberTag = '[object Number]',\n    nullTag = '[object Null]',\n    objectTag = '[object Object]',\n    promiseTag = '[object Promise]',\n    proxyTag = '[object Proxy]',\n    regexpTag = '[object RegExp]',\n    setTag = '[object Set]',\n    stringTag = '[object String]',\n    symbolTag = '[object Symbol]',\n    undefinedTag = '[object Undefined]',\n    weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n    dataViewTag = '[object DataView]',\n    float32Tag = '[object Float32Array]',\n    float64Tag = '[object Float64Array]',\n    int8Tag = '[object Int8Array]',\n    int16Tag = '[object Int16Array]',\n    int32Tag = '[object Int32Array]',\n    uint8Tag = '[object Uint8Array]',\n    uint8ClampedTag = '[object Uint8ClampedArray]',\n    uint16Tag = '[object Uint16Array]',\n    uint32Tag = '[object Uint32Array]';\n\n/**\n * Used to match `RegExp`\n * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).\n */\nvar reRegExpChar = /[\\\\^$.*+?()[\\]{}|]/g;\n\n/** Used to detect host constructors (Safari). */\nvar reIsHostCtor = /^\\[object .+?Constructor\\]$/;\n\n/** Used to detect unsigned integer values. */\nvar reIsUint = /^(?:0|[1-9]\\d*)$/;\n\n/** Used to identify `toStringTag` values of typed arrays. */\nvar typedArrayTags = {};\ntypedArrayTags[float32Tag] = typedArrayTags[float64Tag] =\ntypedArrayTags[int8Tag] = typedArrayTags[int16Tag] =\ntypedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =\ntypedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =\ntypedArrayTags[uint32Tag] = true;\ntypedArrayTags[argsTag] = typedArrayTags[arrayTag] =\ntypedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =\ntypedArrayTags[dataViewTag] = typedArrayTags[dateTag] =\ntypedArrayTags[errorTag] = typedArrayTags[funcTag] =\ntypedArrayTags[mapTag] = typedArrayTags[numberTag] =\ntypedArrayTags[objectTag] = typedArrayTags[regexpTag] =\ntypedArrayTags[setTag] = typedArrayTags[stringTag] =\ntypedArrayTags[weakMapTag] = false;\n\n/** Detect free variable `global` from Node.js. */\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Detect free variable `process` from Node.js. */\nvar freeProcess = moduleExports && freeGlobal.process;\n\n/** Used to access faster Node.js helpers. */\nvar nodeUtil = (function() {\n  try {\n    return freeProcess && freeProcess.binding && freeProcess.binding('util');\n  } catch (e) {}\n}());\n\n/* Node.js helper references. */\nvar nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;\n\n/**\n * A specialized version of `_.filter` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n */\nfunction arrayFilter(array, predicate) {\n  var index = -1,\n      length = array == null ? 0 : array.length,\n      resIndex = 0,\n      result = [];\n\n  while (++index < length) {\n    var value = array[index];\n    if (predicate(value, index, array)) {\n      result[resIndex++] = value;\n    }\n  }\n  return result;\n}\n\n/**\n * Appends the elements of `values` to `array`.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {Array} values The values to append.\n * @returns {Array} Returns `array`.\n */\nfunction arrayPush(array, values) {\n  var index = -1,\n      length = values.length,\n      offset = array.length;\n\n  while (++index < length) {\n    array[offset + index] = values[index];\n  }\n  return array;\n}\n\n/**\n * A specialized version of `_.some` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n *  else `false`.\n */\nfunction arraySome(array, predicate) {\n  var index = -1,\n      length = array == null ? 0 : array.length;\n\n  while (++index < length) {\n    if (predicate(array[index], index, array)) {\n      return true;\n    }\n  }\n  return false;\n}\n\n/**\n * The base implementation of `_.times` without support for iteratee shorthands\n * or max array length checks.\n *\n * @private\n * @param {number} n The number of times to invoke `iteratee`.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the array of results.\n */\nfunction baseTimes(n, iteratee) {\n  var index = -1,\n      result = Array(n);\n\n  while (++index < n) {\n    result[index] = iteratee(index);\n  }\n  return result;\n}\n\n/**\n * The base implementation of `_.unary` without support for storing metadata.\n *\n * @private\n * @param {Function} func The function to cap arguments for.\n * @returns {Function} Returns the new capped function.\n */\nfunction baseUnary(func) {\n  return function(value) {\n    return func(value);\n  };\n}\n\n/**\n * Checks if a `cache` value for `key` exists.\n *\n * @private\n * @param {Object} cache The cache to query.\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction cacheHas(cache, key) {\n  return cache.has(key);\n}\n\n/**\n * Gets the value at `key` of `object`.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {string} key The key of the property to get.\n * @returns {*} Returns the property value.\n */\nfunction getValue(object, key) {\n  return object == null ? undefined : object[key];\n}\n\n/**\n * Converts `map` to its key-value pairs.\n *\n * @private\n * @param {Object} map The map to convert.\n * @returns {Array} Returns the key-value pairs.\n */\nfunction mapToArray(map) {\n  var index = -1,\n      result = Array(map.size);\n\n  map.forEach(function(value, key) {\n    result[++index] = [key, value];\n  });\n  return result;\n}\n\n/**\n * Creates a unary function that invokes `func` with its argument transformed.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {Function} transform The argument transform.\n * @returns {Function} Returns the new function.\n */\nfunction overArg(func, transform) {\n  return function(arg) {\n    return func(transform(arg));\n  };\n}\n\n/**\n * Converts `set` to an array of its values.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the values.\n */\nfunction setToArray(set) {\n  var index = -1,\n      result = Array(set.size);\n\n  set.forEach(function(value) {\n    result[++index] = value;\n  });\n  return result;\n}\n\n/** Used for built-in method references. */\nvar arrayProto = Array.prototype,\n    funcProto = Function.prototype,\n    objectProto = Object.prototype;\n\n/** Used to detect overreaching core-js shims. */\nvar coreJsData = root['__core-js_shared__'];\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Used to detect methods masquerading as native. */\nvar maskSrcKey = (function() {\n  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');\n  return uid ? ('Symbol(src)_1.' + uid) : '';\n}());\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/** Used to detect if a method is native. */\nvar reIsNative = RegExp('^' +\n  funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\\\$&')\n  .replace(/hasOwnProperty|(function).*?(?=\\\\\\()| for .+?(?=\\\\\\])/g, '$1.*?') + '$'\n);\n\n/** Built-in value references. */\nvar Buffer = moduleExports ? root.Buffer : undefined,\n    Symbol = root.Symbol,\n    Uint8Array = root.Uint8Array,\n    propertyIsEnumerable = objectProto.propertyIsEnumerable,\n    splice = arrayProto.splice,\n    symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeGetSymbols = Object.getOwnPropertySymbols,\n    nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,\n    nativeKeys = overArg(Object.keys, Object);\n\n/* Built-in method references that are verified to be native. */\nvar DataView = getNative(root, 'DataView'),\n    Map = getNative(root, 'Map'),\n    Promise = getNative(root, 'Promise'),\n    Set = getNative(root, 'Set'),\n    WeakMap = getNative(root, 'WeakMap'),\n    nativeCreate = getNative(Object, 'create');\n\n/** Used to detect maps, sets, and weakmaps. */\nvar dataViewCtorString = toSource(DataView),\n    mapCtorString = toSource(Map),\n    promiseCtorString = toSource(Promise),\n    setCtorString = toSource(Set),\n    weakMapCtorString = toSource(WeakMap);\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n    symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * Creates a hash object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Hash(entries) {\n  var index = -1,\n      length = entries == null ? 0 : entries.length;\n\n  this.clear();\n  while (++index < length) {\n    var entry = entries[index];\n    this.set(entry[0], entry[1]);\n  }\n}\n\n/**\n * Removes all key-value entries from the hash.\n *\n * @private\n * @name clear\n * @memberOf Hash\n */\nfunction hashClear() {\n  this.__data__ = nativeCreate ? nativeCreate(null) : {};\n  this.size = 0;\n}\n\n/**\n * Removes `key` and its value from the hash.\n *\n * @private\n * @name delete\n * @memberOf Hash\n * @param {Object} hash The hash to modify.\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction hashDelete(key) {\n  var result = this.has(key) && delete this.__data__[key];\n  this.size -= result ? 1 : 0;\n  return result;\n}\n\n/**\n * Gets the hash value for `key`.\n *\n * @private\n * @name get\n * @memberOf Hash\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction hashGet(key) {\n  var data = this.__data__;\n  if (nativeCreate) {\n    var result = data[key];\n    return result === HASH_UNDEFINED ? undefined : result;\n  }\n  return hasOwnProperty.call(data, key) ? data[key] : undefined;\n}\n\n/**\n * Checks if a hash value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Hash\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction hashHas(key) {\n  var data = this.__data__;\n  return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);\n}\n\n/**\n * Sets the hash `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Hash\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the hash instance.\n */\nfunction hashSet(key, value) {\n  var data = this.__data__;\n  this.size += this.has(key) ? 0 : 1;\n  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;\n  return this;\n}\n\n// Add methods to `Hash`.\nHash.prototype.clear = hashClear;\nHash.prototype['delete'] = hashDelete;\nHash.prototype.get = hashGet;\nHash.prototype.has = hashHas;\nHash.prototype.set = hashSet;\n\n/**\n * Creates an list cache object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction ListCache(entries) {\n  var index = -1,\n      length = entries == null ? 0 : entries.length;\n\n  this.clear();\n  while (++index < length) {\n    var entry = entries[index];\n    this.set(entry[0], entry[1]);\n  }\n}\n\n/**\n * Removes all key-value entries from the list cache.\n *\n * @private\n * @name clear\n * @memberOf ListCache\n */\nfunction listCacheClear() {\n  this.__data__ = [];\n  this.size = 0;\n}\n\n/**\n * Removes `key` and its value from the list cache.\n *\n * @private\n * @name delete\n * @memberOf ListCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction listCacheDelete(key) {\n  var data = this.__data__,\n      index = assocIndexOf(data, key);\n\n  if (index < 0) {\n    return false;\n  }\n  var lastIndex = data.length - 1;\n  if (index == lastIndex) {\n    data.pop();\n  } else {\n    splice.call(data, index, 1);\n  }\n  --this.size;\n  return true;\n}\n\n/**\n * Gets the list cache value for `key`.\n *\n * @private\n * @name get\n * @memberOf ListCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction listCacheGet(key) {\n  var data = this.__data__,\n      index = assocIndexOf(data, key);\n\n  return index < 0 ? undefined : data[index][1];\n}\n\n/**\n * Checks if a list cache value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf ListCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction listCacheHas(key) {\n  return assocIndexOf(this.__data__, key) > -1;\n}\n\n/**\n * Sets the list cache `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf ListCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the list cache instance.\n */\nfunction listCacheSet(key, value) {\n  var data = this.__data__,\n      index = assocIndexOf(data, key);\n\n  if (index < 0) {\n    ++this.size;\n    data.push([key, value]);\n  } else {\n    data[index][1] = value;\n  }\n  return this;\n}\n\n// Add methods to `ListCache`.\nListCache.prototype.clear = listCacheClear;\nListCache.prototype['delete'] = listCacheDelete;\nListCache.prototype.get = listCacheGet;\nListCache.prototype.has = listCacheHas;\nListCache.prototype.set = listCacheSet;\n\n/**\n * Creates a map cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction MapCache(entries) {\n  var index = -1,\n      length = entries == null ? 0 : entries.length;\n\n  this.clear();\n  while (++index < length) {\n    var entry = entries[index];\n    this.set(entry[0], entry[1]);\n  }\n}\n\n/**\n * Removes all key-value entries from the map.\n *\n * @private\n * @name clear\n * @memberOf MapCache\n */\nfunction mapCacheClear() {\n  this.size = 0;\n  this.__data__ = {\n    'hash': new Hash,\n    'map': new (Map || ListCache),\n    'string': new Hash\n  };\n}\n\n/**\n * Removes `key` and its value from the map.\n *\n * @private\n * @name delete\n * @memberOf MapCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction mapCacheDelete(key) {\n  var result = getMapData(this, key)['delete'](key);\n  this.size -= result ? 1 : 0;\n  return result;\n}\n\n/**\n * Gets the map value for `key`.\n *\n * @private\n * @name get\n * @memberOf MapCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction mapCacheGet(key) {\n  return getMapData(this, key).get(key);\n}\n\n/**\n * Checks if a map value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf MapCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction mapCacheHas(key) {\n  return getMapData(this, key).has(key);\n}\n\n/**\n * Sets the map `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf MapCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the map cache instance.\n */\nfunction mapCacheSet(key, value) {\n  var data = getMapData(this, key),\n      size = data.size;\n\n  data.set(key, value);\n  this.size += data.size == size ? 0 : 1;\n  return this;\n}\n\n// Add methods to `MapCache`.\nMapCache.prototype.clear = mapCacheClear;\nMapCache.prototype['delete'] = mapCacheDelete;\nMapCache.prototype.get = mapCacheGet;\nMapCache.prototype.has = mapCacheHas;\nMapCache.prototype.set = mapCacheSet;\n\n/**\n *\n * Creates an array cache object to store unique values.\n *\n * @private\n * @constructor\n * @param {Array} [values] The values to cache.\n */\nfunction SetCache(values) {\n  var index = -1,\n      length = values == null ? 0 : values.length;\n\n  this.__data__ = new MapCache;\n  while (++index < length) {\n    this.add(values[index]);\n  }\n}\n\n/**\n * Adds `value` to the array cache.\n *\n * @private\n * @name add\n * @memberOf SetCache\n * @alias push\n * @param {*} value The value to cache.\n * @returns {Object} Returns the cache instance.\n */\nfunction setCacheAdd(value) {\n  this.__data__.set(value, HASH_UNDEFINED);\n  return this;\n}\n\n/**\n * Checks if `value` is in the array cache.\n *\n * @private\n * @name has\n * @memberOf SetCache\n * @param {*} value The value to search for.\n * @returns {number} Returns `true` if `value` is found, else `false`.\n */\nfunction setCacheHas(value) {\n  return this.__data__.has(value);\n}\n\n// Add methods to `SetCache`.\nSetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\nSetCache.prototype.has = setCacheHas;\n\n/**\n * Creates a stack cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Stack(entries) {\n  var data = this.__data__ = new ListCache(entries);\n  this.size = data.size;\n}\n\n/**\n * Removes all key-value entries from the stack.\n *\n * @private\n * @name clear\n * @memberOf Stack\n */\nfunction stackClear() {\n  this.__data__ = new ListCache;\n  this.size = 0;\n}\n\n/**\n * Removes `key` and its value from the stack.\n *\n * @private\n * @name delete\n * @memberOf Stack\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction stackDelete(key) {\n  var data = this.__data__,\n      result = data['delete'](key);\n\n  this.size = data.size;\n  return result;\n}\n\n/**\n * Gets the stack value for `key`.\n *\n * @private\n * @name get\n * @memberOf Stack\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction stackGet(key) {\n  return this.__data__.get(key);\n}\n\n/**\n * Checks if a stack value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Stack\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction stackHas(key) {\n  return this.__data__.has(key);\n}\n\n/**\n * Sets the stack `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Stack\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the stack cache instance.\n */\nfunction stackSet(key, value) {\n  var data = this.__data__;\n  if (data instanceof ListCache) {\n    var pairs = data.__data__;\n    if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {\n      pairs.push([key, value]);\n      this.size = ++data.size;\n      return this;\n    }\n    data = this.__data__ = new MapCache(pairs);\n  }\n  data.set(key, value);\n  this.size = data.size;\n  return this;\n}\n\n// Add methods to `Stack`.\nStack.prototype.clear = stackClear;\nStack.prototype['delete'] = stackDelete;\nStack.prototype.get = stackGet;\nStack.prototype.has = stackHas;\nStack.prototype.set = stackSet;\n\n/**\n * Creates an array of the enumerable property names of the array-like `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @param {boolean} inherited Specify returning inherited property names.\n * @returns {Array} Returns the array of property names.\n */\nfunction arrayLikeKeys(value, inherited) {\n  var isArr = isArray(value),\n      isArg = !isArr && isArguments(value),\n      isBuff = !isArr && !isArg && isBuffer(value),\n      isType = !isArr && !isArg && !isBuff && isTypedArray(value),\n      skipIndexes = isArr || isArg || isBuff || isType,\n      result = skipIndexes ? baseTimes(value.length, String) : [],\n      length = result.length;\n\n  for (var key in value) {\n    if ((inherited || hasOwnProperty.call(value, key)) &&\n        !(skipIndexes && (\n           // Safari 9 has enumerable `arguments.length` in strict mode.\n           key == 'length' ||\n           // Node.js 0.10 has enumerable non-index properties on buffers.\n           (isBuff && (key == 'offset' || key == 'parent')) ||\n           // PhantomJS 2 has enumerable non-index properties on typed arrays.\n           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||\n           // Skip index properties.\n           isIndex(key, length)\n        ))) {\n      result.push(key);\n    }\n  }\n  return result;\n}\n\n/**\n * Gets the index at which the `key` is found in `array` of key-value pairs.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} key The key to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction assocIndexOf(array, key) {\n  var length = array.length;\n  while (length--) {\n    if (eq(array[length][0], key)) {\n      return length;\n    }\n  }\n  return -1;\n}\n\n/**\n * The base implementation of `getAllKeys` and `getAllKeysIn` which uses\n * `keysFunc` and `symbolsFunc` to get the enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @param {Function} symbolsFunc The function to get the symbols of `object`.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction baseGetAllKeys(object, keysFunc, symbolsFunc) {\n  var result = keysFunc(object);\n  return isArray(object) ? result : arrayPush(result, symbolsFunc(object));\n}\n\n/**\n * The base implementation of `getTag` without fallbacks for buggy environments.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nfunction baseGetTag(value) {\n  if (value == null) {\n    return value === undefined ? undefinedTag : nullTag;\n  }\n  return (symToStringTag && symToStringTag in Object(value))\n    ? getRawTag(value)\n    : objectToString(value);\n}\n\n/**\n * The base implementation of `_.isArguments`.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n */\nfunction baseIsArguments(value) {\n  return isObjectLike(value) && baseGetTag(value) == argsTag;\n}\n\n/**\n * The base implementation of `_.isEqual` which supports partial comparisons\n * and tracks traversed objects.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {boolean} bitmask The bitmask flags.\n *  1 - Unordered comparison\n *  2 - Partial comparison\n * @param {Function} [customizer] The function to customize comparisons.\n * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n */\nfunction baseIsEqual(value, other, bitmask, customizer, stack) {\n  if (value === other) {\n    return true;\n  }\n  if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n    return value !== value && other !== other;\n  }\n  return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n}\n\n/**\n * A specialized version of `baseIsEqual` for arrays and objects which performs\n * deep comparisons and tracks traversed objects enabling objects with circular\n * references to be compared.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n  var objIsArr = isArray(object),\n      othIsArr = isArray(other),\n      objTag = objIsArr ? arrayTag : getTag(object),\n      othTag = othIsArr ? arrayTag : getTag(other);\n\n  objTag = objTag == argsTag ? objectTag : objTag;\n  othTag = othTag == argsTag ? objectTag : othTag;\n\n  var objIsObj = objTag == objectTag,\n      othIsObj = othTag == objectTag,\n      isSameTag = objTag == othTag;\n\n  if (isSameTag && isBuffer(object)) {\n    if (!isBuffer(other)) {\n      return false;\n    }\n    objIsArr = true;\n    objIsObj = false;\n  }\n  if (isSameTag && !objIsObj) {\n    stack || (stack = new Stack);\n    return (objIsArr || isTypedArray(object))\n      ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n      : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n  }\n  if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n    if (objIsWrapped || othIsWrapped) {\n      var objUnwrapped = objIsWrapped ? object.value() : object,\n          othUnwrapped = othIsWrapped ? other.value() : other;\n\n      stack || (stack = new Stack);\n      return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n    }\n  }\n  if (!isSameTag) {\n    return false;\n  }\n  stack || (stack = new Stack);\n  return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n}\n\n/**\n * The base implementation of `_.isNative` without bad shim checks.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n *  else `false`.\n */\nfunction baseIsNative(value) {\n  if (!isObject(value) || isMasked(value)) {\n    return false;\n  }\n  var pattern = isFunction(value) ? reIsNative : reIsHostCtor;\n  return pattern.test(toSource(value));\n}\n\n/**\n * The base implementation of `_.isTypedArray` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n */\nfunction baseIsTypedArray(value) {\n  return isObjectLike(value) &&\n    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];\n}\n\n/**\n * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeys(object) {\n  if (!isPrototype(object)) {\n    return nativeKeys(object);\n  }\n  var result = [];\n  for (var key in Object(object)) {\n    if (hasOwnProperty.call(object, key) && key != 'constructor') {\n      result.push(key);\n    }\n  }\n  return result;\n}\n\n/**\n * A specialized version of `baseIsEqualDeep` for arrays with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Array} array The array to compare.\n * @param {Array} other The other array to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `array` and `other` objects.\n * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n */\nfunction equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n  var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n      arrLength = array.length,\n      othLength = other.length;\n\n  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n    return false;\n  }\n  // Assume cyclic values are equal.\n  var stacked = stack.get(array);\n  if (stacked && stack.get(other)) {\n    return stacked == other;\n  }\n  var index = -1,\n      result = true,\n      seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n  stack.set(array, other);\n  stack.set(other, array);\n\n  // Ignore non-index properties.\n  while (++index < arrLength) {\n    var arrValue = array[index],\n        othValue = other[index];\n\n    if (customizer) {\n      var compared = isPartial\n        ? customizer(othValue, arrValue, index, other, array, stack)\n        : customizer(arrValue, othValue, index, array, other, stack);\n    }\n    if (compared !== undefined) {\n      if (compared) {\n        continue;\n      }\n      result = false;\n      break;\n    }\n    // Recursively compare arrays (susceptible to call stack limits).\n    if (seen) {\n      if (!arraySome(other, function(othValue, othIndex) {\n            if (!cacheHas(seen, othIndex) &&\n                (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n              return seen.push(othIndex);\n            }\n          })) {\n        result = false;\n        break;\n      }\n    } else if (!(\n          arrValue === othValue ||\n            equalFunc(arrValue, othValue, bitmask, customizer, stack)\n        )) {\n      result = false;\n      break;\n    }\n  }\n  stack['delete'](array);\n  stack['delete'](other);\n  return result;\n}\n\n/**\n * A specialized version of `baseIsEqualDeep` for comparing objects of\n * the same `toStringTag`.\n *\n * **Note:** This function only supports comparing values with tags of\n * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {string} tag The `toStringTag` of the objects to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n  switch (tag) {\n    case dataViewTag:\n      if ((object.byteLength != other.byteLength) ||\n          (object.byteOffset != other.byteOffset)) {\n        return false;\n      }\n      object = object.buffer;\n      other = other.buffer;\n\n    case arrayBufferTag:\n      if ((object.byteLength != other.byteLength) ||\n          !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n        return false;\n      }\n      return true;\n\n    case boolTag:\n    case dateTag:\n    case numberTag:\n      // Coerce booleans to `1` or `0` and dates to milliseconds.\n      // Invalid dates are coerced to `NaN`.\n      return eq(+object, +other);\n\n    case errorTag:\n      return object.name == other.name && object.message == other.message;\n\n    case regexpTag:\n    case stringTag:\n      // Coerce regexes to strings and treat strings, primitives and objects,\n      // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n      // for more details.\n      return object == (other + '');\n\n    case mapTag:\n      var convert = mapToArray;\n\n    case setTag:\n      var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n      convert || (convert = setToArray);\n\n      if (object.size != other.size && !isPartial) {\n        return false;\n      }\n      // Assume cyclic values are equal.\n      var stacked = stack.get(object);\n      if (stacked) {\n        return stacked == other;\n      }\n      bitmask |= COMPARE_UNORDERED_FLAG;\n\n      // Recursively compare objects (susceptible to call stack limits).\n      stack.set(object, other);\n      var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n      stack['delete'](object);\n      return result;\n\n    case symbolTag:\n      if (symbolValueOf) {\n        return symbolValueOf.call(object) == symbolValueOf.call(other);\n      }\n  }\n  return false;\n}\n\n/**\n * A specialized version of `baseIsEqualDeep` for objects with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n  var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n      objProps = getAllKeys(object),\n      objLength = objProps.length,\n      othProps = getAllKeys(other),\n      othLength = othProps.length;\n\n  if (objLength != othLength && !isPartial) {\n    return false;\n  }\n  var index = objLength;\n  while (index--) {\n    var key = objProps[index];\n    if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n      return false;\n    }\n  }\n  // Assume cyclic values are equal.\n  var stacked = stack.get(object);\n  if (stacked && stack.get(other)) {\n    return stacked == other;\n  }\n  var result = true;\n  stack.set(object, other);\n  stack.set(other, object);\n\n  var skipCtor = isPartial;\n  while (++index < objLength) {\n    key = objProps[index];\n    var objValue = object[key],\n        othValue = other[key];\n\n    if (customizer) {\n      var compared = isPartial\n        ? customizer(othValue, objValue, key, other, object, stack)\n        : customizer(objValue, othValue, key, object, other, stack);\n    }\n    // Recursively compare objects (susceptible to call stack limits).\n    if (!(compared === undefined\n          ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n          : compared\n        )) {\n      result = false;\n      break;\n    }\n    skipCtor || (skipCtor = key == 'constructor');\n  }\n  if (result && !skipCtor) {\n    var objCtor = object.constructor,\n        othCtor = other.constructor;\n\n    // Non `Object` object instances with different constructors are not equal.\n    if (objCtor != othCtor &&\n        ('constructor' in object && 'constructor' in other) &&\n        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n          typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n      result = false;\n    }\n  }\n  stack['delete'](object);\n  stack['delete'](other);\n  return result;\n}\n\n/**\n * Creates an array of own enumerable property names and symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction getAllKeys(object) {\n  return baseGetAllKeys(object, keys, getSymbols);\n}\n\n/**\n * Gets the data for `map`.\n *\n * @private\n * @param {Object} map The map to query.\n * @param {string} key The reference key.\n * @returns {*} Returns the map data.\n */\nfunction getMapData(map, key) {\n  var data = map.__data__;\n  return isKeyable(key)\n    ? data[typeof key == 'string' ? 'string' : 'hash']\n    : data.map;\n}\n\n/**\n * Gets the native function at `key` of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {string} key The key of the method to get.\n * @returns {*} Returns the function if it's native, else `undefined`.\n */\nfunction getNative(object, key) {\n  var value = getValue(object, key);\n  return baseIsNative(value) ? value : undefined;\n}\n\n/**\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the raw `toStringTag`.\n */\nfunction getRawTag(value) {\n  var isOwn = hasOwnProperty.call(value, symToStringTag),\n      tag = value[symToStringTag];\n\n  try {\n    value[symToStringTag] = undefined;\n    var unmasked = true;\n  } catch (e) {}\n\n  var result = nativeObjectToString.call(value);\n  if (unmasked) {\n    if (isOwn) {\n      value[symToStringTag] = tag;\n    } else {\n      delete value[symToStringTag];\n    }\n  }\n  return result;\n}\n\n/**\n * Creates an array of the own enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\nvar getSymbols = !nativeGetSymbols ? stubArray : function(object) {\n  if (object == null) {\n    return [];\n  }\n  object = Object(object);\n  return arrayFilter(nativeGetSymbols(object), function(symbol) {\n    return propertyIsEnumerable.call(object, symbol);\n  });\n};\n\n/**\n * Gets the `toStringTag` of `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nvar getTag = baseGetTag;\n\n// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.\nif ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||\n    (Map && getTag(new Map) != mapTag) ||\n    (Promise && getTag(Promise.resolve()) != promiseTag) ||\n    (Set && getTag(new Set) != setTag) ||\n    (WeakMap && getTag(new WeakMap) != weakMapTag)) {\n  getTag = function(value) {\n    var result = baseGetTag(value),\n        Ctor = result == objectTag ? value.constructor : undefined,\n        ctorString = Ctor ? toSource(Ctor) : '';\n\n    if (ctorString) {\n      switch (ctorString) {\n        case dataViewCtorString: return dataViewTag;\n        case mapCtorString: return mapTag;\n        case promiseCtorString: return promiseTag;\n        case setCtorString: return setTag;\n        case weakMapCtorString: return weakMapTag;\n      }\n    }\n    return result;\n  };\n}\n\n/**\n * Checks if `value` is a valid array-like index.\n *\n * @private\n * @param {*} value The value to check.\n * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.\n * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.\n */\nfunction isIndex(value, length) {\n  length = length == null ? MAX_SAFE_INTEGER : length;\n  return !!length &&\n    (typeof value == 'number' || reIsUint.test(value)) &&\n    (value > -1 && value % 1 == 0 && value < length);\n}\n\n/**\n * Checks if `value` is suitable for use as unique object key.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is suitable, else `false`.\n */\nfunction isKeyable(value) {\n  var type = typeof value;\n  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')\n    ? (value !== '__proto__')\n    : (value === null);\n}\n\n/**\n * Checks if `func` has its source masked.\n *\n * @private\n * @param {Function} func The function to check.\n * @returns {boolean} Returns `true` if `func` is masked, else `false`.\n */\nfunction isMasked(func) {\n  return !!maskSrcKey && (maskSrcKey in func);\n}\n\n/**\n * Checks if `value` is likely a prototype object.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.\n */\nfunction isPrototype(value) {\n  var Ctor = value && value.constructor,\n      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;\n\n  return value === proto;\n}\n\n/**\n * Converts `value` to a string using `Object.prototype.toString`.\n *\n * @private\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n */\nfunction objectToString(value) {\n  return nativeObjectToString.call(value);\n}\n\n/**\n * Converts `func` to its source code.\n *\n * @private\n * @param {Function} func The function to convert.\n * @returns {string} Returns the source code.\n */\nfunction toSource(func) {\n  if (func != null) {\n    try {\n      return funcToString.call(func);\n    } catch (e) {}\n    try {\n      return (func + '');\n    } catch (e) {}\n  }\n  return '';\n}\n\n/**\n * Performs a\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * comparison between two values to determine if they are equivalent.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.eq(object, object);\n * // => true\n *\n * _.eq(object, other);\n * // => false\n *\n * _.eq('a', 'a');\n * // => true\n *\n * _.eq('a', Object('a'));\n * // => false\n *\n * _.eq(NaN, NaN);\n * // => true\n */\nfunction eq(value, other) {\n  return value === other || (value !== value && other !== other);\n}\n\n/**\n * Checks if `value` is likely an `arguments` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n *  else `false`.\n * @example\n *\n * _.isArguments(function() { return arguments; }());\n * // => true\n *\n * _.isArguments([1, 2, 3]);\n * // => false\n */\nvar isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n  return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&\n    !propertyIsEnumerable.call(value, 'callee');\n};\n\n/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\n/**\n * Checks if `value` is array-like. A value is considered array-like if it's\n * not a function and has a `value.length` that's an integer greater than or\n * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n * @example\n *\n * _.isArrayLike([1, 2, 3]);\n * // => true\n *\n * _.isArrayLike(document.body.children);\n * // => true\n *\n * _.isArrayLike('abc');\n * // => true\n *\n * _.isArrayLike(_.noop);\n * // => false\n */\nfunction isArrayLike(value) {\n  return value != null && isLength(value.length) && !isFunction(value);\n}\n\n/**\n * Checks if `value` is a buffer.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n * @example\n *\n * _.isBuffer(new Buffer(2));\n * // => true\n *\n * _.isBuffer(new Uint8Array(2));\n * // => false\n */\nvar isBuffer = nativeIsBuffer || stubFalse;\n\n/**\n * Performs a deep comparison between two values to determine if they are\n * equivalent.\n *\n * **Note:** This method supports comparing arrays, array buffers, booleans,\n * date objects, error objects, maps, numbers, `Object` objects, regexes,\n * sets, strings, symbols, and typed arrays. `Object` objects are compared\n * by their own, not inherited, enumerable properties. Functions and DOM\n * nodes are compared by strict equality, i.e. `===`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.isEqual(object, other);\n * // => true\n *\n * object === other;\n * // => false\n */\nfunction isEqual(value, other) {\n  return baseIsEqual(value, other);\n}\n\n/**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\nfunction isFunction(value) {\n  if (!isObject(value)) {\n    return false;\n  }\n  // The use of `Object#toString` avoids issues with the `typeof` operator\n  // in Safari 9 which returns 'object' for typed arrays and other constructors.\n  var tag = baseGetTag(value);\n  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n}\n\n/**\n * Checks if `value` is a valid array-like length.\n *\n * **Note:** This method is loosely based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n * @example\n *\n * _.isLength(3);\n * // => true\n *\n * _.isLength(Number.MIN_VALUE);\n * // => false\n *\n * _.isLength(Infinity);\n * // => false\n *\n * _.isLength('3');\n * // => false\n */\nfunction isLength(value) {\n  return typeof value == 'number' &&\n    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n}\n\n/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n  var type = typeof value;\n  return value != null && (type == 'object' || type == 'function');\n}\n\n/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n  return value != null && typeof value == 'object';\n}\n\n/**\n * Checks if `value` is classified as a typed array.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n * @example\n *\n * _.isTypedArray(new Uint8Array);\n * // => true\n *\n * _.isTypedArray([]);\n * // => false\n */\nvar isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\n/**\n * Creates an array of the own enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects. See the\n * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * for more details.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n *   this.a = 1;\n *   this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keys(new Foo);\n * // => ['a', 'b'] (iteration order is not guaranteed)\n *\n * _.keys('hi');\n * // => ['0', '1']\n */\nfunction keys(object) {\n  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n}\n\n/**\n * This method returns a new empty array.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {Array} Returns the new empty array.\n * @example\n *\n * var arrays = _.times(2, _.stubArray);\n *\n * console.log(arrays);\n * // => [[], []]\n *\n * console.log(arrays[0] === arrays[1]);\n * // => false\n */\nfunction stubArray() {\n  return [];\n}\n\n/**\n * This method returns `false`.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {boolean} Returns `false`.\n * @example\n *\n * _.times(2, _.stubFalse);\n * // => [false, false]\n */\nfunction stubFalse() {\n  return false;\n}\n\nmodule.exports = isEqual;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/**\n * Checks if `value` is a function.\n *\n * @static\n * @memberOf _\n * @category Objects\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if the `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n */\nfunction isFunction(value) {\n  return typeof value == 'function';\n}\n\nmodule.exports = isFunction;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar objectTypes = require('lodash._objecttypes');\n\n/**\n * Checks if `value` is the language type of Object.\n * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @category Objects\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if the `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(1);\n * // => false\n */\nfunction isObject(value) {\n  // check if the value is the ECMAScript language type of Object\n  // http://es5.github.io/#x8\n  // and avoid a V8 bug\n  // http://code.google.com/p/v8/issues/detail?id=2291\n  return !!(value && objectTypes[typeof value]);\n}\n\nmodule.exports = isObject;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar isNative = require('lodash._isnative'),\n    isObject = require('lodash.isobject'),\n    shimKeys = require('lodash._shimkeys');\n\n/* Native method shortcuts for methods with the same name as other `lodash` methods */\nvar nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys;\n\n/**\n * Creates an array composed of the own enumerable property names of an object.\n *\n * @static\n * @memberOf _\n * @category Objects\n * @param {Object} object The object to inspect.\n * @returns {Array} Returns an array of property names.\n * @example\n *\n * _.keys({ 'one': 1, 'two': 2, 'three': 3 });\n * // => ['one', 'two', 'three'] (property order is not guaranteed across environments)\n */\nvar keys = !nativeKeys ? shimKeys : function(object) {\n  if (!isObject(object)) {\n    return [];\n  }\n  return nativeKeys(object);\n};\n\nmodule.exports = keys;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\n\n/**\n * A no-operation function.\n *\n * @static\n * @memberOf _\n * @category Utilities\n * @example\n *\n * var object = { 'name': 'fred' };\n * _.noop(object) === undefined;\n * // => true\n */\nfunction noop() {\n  // no operation performed\n}\n\nmodule.exports = noop;\n","/**\n * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>\n * Build: `lodash modularize modern exports=\"npm\" -o ./npm/`\n * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>\n * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>\n * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n * Available under MIT license <http://lodash.com/license>\n */\nvar isNative = require('lodash._isnative');\n\n/** Used to detect functions containing a `this` reference */\nvar reThis = /\\bthis\\b/;\n\n/**\n * An object used to flag environments features.\n *\n * @static\n * @memberOf _\n * @type Object\n */\nvar support = {};\n\n/**\n * Detect if functions can be decompiled by `Function#toString`\n * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps).\n *\n * @memberOf _.support\n * @type boolean\n */\nsupport.funcDecomp = !isNative(global.WinRTError) && reThis.test(function() { return this; });\n\n/**\n * Detect if `Function#name` is supported (all but IE).\n *\n * @memberOf _.support\n * @type boolean\n */\nsupport.funcNames = typeof Function.name == 'string';\n\nmodule.exports = support;\n","/**\n * @license\n * Lodash <https://lodash.com/>\n * Copyright JS Foundation and other contributors <https://js.foundation/>\n * Released under MIT license <https://lodash.com/license>\n * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>\n * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n */\n;(function() {\n\n  /** Used as a safe reference for `undefined` in pre-ES5 environments. */\n  var undefined;\n\n  /** Used as the semantic version number. */\n  var VERSION = '4.17.4';\n\n  /** Used as the size to enable large array optimizations. */\n  var LARGE_ARRAY_SIZE = 200;\n\n  /** Error message constants. */\n  var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',\n      FUNC_ERROR_TEXT = 'Expected a function';\n\n  /** Used to stand-in for `undefined` hash values. */\n  var HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n  /** Used as the maximum memoize cache size. */\n  var MAX_MEMOIZE_SIZE = 500;\n\n  /** Used as the internal argument placeholder. */\n  var PLACEHOLDER = '__lodash_placeholder__';\n\n  /** Used to compose bitmasks for cloning. */\n  var CLONE_DEEP_FLAG = 1,\n      CLONE_FLAT_FLAG = 2,\n      CLONE_SYMBOLS_FLAG = 4;\n\n  /** Used to compose bitmasks for value comparisons. */\n  var COMPARE_PARTIAL_FLAG = 1,\n      COMPARE_UNORDERED_FLAG = 2;\n\n  /** Used to compose bitmasks for function metadata. */\n  var WRAP_BIND_FLAG = 1,\n      WRAP_BIND_KEY_FLAG = 2,\n      WRAP_CURRY_BOUND_FLAG = 4,\n      WRAP_CURRY_FLAG = 8,\n      WRAP_CURRY_RIGHT_FLAG = 16,\n      WRAP_PARTIAL_FLAG = 32,\n      WRAP_PARTIAL_RIGHT_FLAG = 64,\n      WRAP_ARY_FLAG = 128,\n      WRAP_REARG_FLAG = 256,\n      WRAP_FLIP_FLAG = 512;\n\n  /** Used as default options for `_.truncate`. */\n  var DEFAULT_TRUNC_LENGTH = 30,\n      DEFAULT_TRUNC_OMISSION = '...';\n\n  /** Used to detect hot functions by number of calls within a span of milliseconds. */\n  var HOT_COUNT = 800,\n      HOT_SPAN = 16;\n\n  /** Used to indicate the type of lazy iteratees. */\n  var LAZY_FILTER_FLAG = 1,\n      LAZY_MAP_FLAG = 2,\n      LAZY_WHILE_FLAG = 3;\n\n  /** Used as references for various `Number` constants. */\n  var INFINITY = 1 / 0,\n      MAX_SAFE_INTEGER = 9007199254740991,\n      MAX_INTEGER = 1.7976931348623157e+308,\n      NAN = 0 / 0;\n\n  /** Used as references for the maximum length and index of an array. */\n  var MAX_ARRAY_LENGTH = 4294967295,\n      MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,\n      HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;\n\n  /** Used to associate wrap methods with their bit flags. */\n  var wrapFlags = [\n    ['ary', WRAP_ARY_FLAG],\n    ['bind', WRAP_BIND_FLAG],\n    ['bindKey', WRAP_BIND_KEY_FLAG],\n    ['curry', WRAP_CURRY_FLAG],\n    ['curryRight', WRAP_CURRY_RIGHT_FLAG],\n    ['flip', WRAP_FLIP_FLAG],\n    ['partial', WRAP_PARTIAL_FLAG],\n    ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],\n    ['rearg', WRAP_REARG_FLAG]\n  ];\n\n  /** `Object#toString` result references. */\n  var argsTag = '[object Arguments]',\n      arrayTag = '[object Array]',\n      asyncTag = '[object AsyncFunction]',\n      boolTag = '[object Boolean]',\n      dateTag = '[object Date]',\n      domExcTag = '[object DOMException]',\n      errorTag = '[object Error]',\n      funcTag = '[object Function]',\n      genTag = '[object GeneratorFunction]',\n      mapTag = '[object Map]',\n      numberTag = '[object Number]',\n      nullTag = '[object Null]',\n      objectTag = '[object Object]',\n      promiseTag = '[object Promise]',\n      proxyTag = '[object Proxy]',\n      regexpTag = '[object RegExp]',\n      setTag = '[object Set]',\n      stringTag = '[object String]',\n      symbolTag = '[object Symbol]',\n      undefinedTag = '[object Undefined]',\n      weakMapTag = '[object WeakMap]',\n      weakSetTag = '[object WeakSet]';\n\n  var arrayBufferTag = '[object ArrayBuffer]',\n      dataViewTag = '[object DataView]',\n      float32Tag = '[object Float32Array]',\n      float64Tag = '[object Float64Array]',\n      int8Tag = '[object Int8Array]',\n      int16Tag = '[object Int16Array]',\n      int32Tag = '[object Int32Array]',\n      uint8Tag = '[object Uint8Array]',\n      uint8ClampedTag = '[object Uint8ClampedArray]',\n      uint16Tag = '[object Uint16Array]',\n      uint32Tag = '[object Uint32Array]';\n\n  /** Used to match empty string literals in compiled template source. */\n  var reEmptyStringLeading = /\\b__p \\+= '';/g,\n      reEmptyStringMiddle = /\\b(__p \\+=) '' \\+/g,\n      reEmptyStringTrailing = /(__e\\(.*?\\)|\\b__t\\)) \\+\\n'';/g;\n\n  /** Used to match HTML entities and HTML characters. */\n  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,\n      reUnescapedHtml = /[&<>\"']/g,\n      reHasEscapedHtml = RegExp(reEscapedHtml.source),\n      reHasUnescapedHtml = RegExp(reUnescapedHtml.source);\n\n  /** Used to match template delimiters. */\n  var reEscape = /<%-([\\s\\S]+?)%>/g,\n      reEvaluate = /<%([\\s\\S]+?)%>/g,\n      reInterpolate = /<%=([\\s\\S]+?)%>/g;\n\n  /** Used to match property names within property paths. */\n  var reIsDeepProp = /\\.|\\[(?:[^[\\]]*|([\"'])(?:(?!\\1)[^\\\\]|\\\\.)*?\\1)\\]/,\n      reIsPlainProp = /^\\w*$/,\n      reLeadingDot = /^\\./,\n      rePropName = /[^.[\\]]+|\\[(?:(-?\\d+(?:\\.\\d+)?)|([\"'])((?:(?!\\2)[^\\\\]|\\\\.)*?)\\2)\\]|(?=(?:\\.|\\[\\])(?:\\.|\\[\\]|$))/g;\n\n  /**\n   * Used to match `RegExp`\n   * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).\n   */\n  var reRegExpChar = /[\\\\^$.*+?()[\\]{}|]/g,\n      reHasRegExpChar = RegExp(reRegExpChar.source);\n\n  /** Used to match leading and trailing whitespace. */\n  var reTrim = /^\\s+|\\s+$/g,\n      reTrimStart = /^\\s+/,\n      reTrimEnd = /\\s+$/;\n\n  /** Used to match wrap detail comments. */\n  var reWrapComment = /\\{(?:\\n\\/\\* \\[wrapped with .+\\] \\*\\/)?\\n?/,\n      reWrapDetails = /\\{\\n\\/\\* \\[wrapped with (.+)\\] \\*/,\n      reSplitDetails = /,? & /;\n\n  /** Used to match words composed of alphanumeric characters. */\n  var reAsciiWord = /[^\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\x7f]+/g;\n\n  /** Used to match backslashes in property paths. */\n  var reEscapeChar = /\\\\(\\\\)?/g;\n\n  /**\n   * Used to match\n   * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).\n   */\n  var reEsTemplate = /\\$\\{([^\\\\}]*(?:\\\\.[^\\\\}]*)*)\\}/g;\n\n  /** Used to match `RegExp` flags from their coerced string values. */\n  var reFlags = /\\w*$/;\n\n  /** Used to detect bad signed hexadecimal string values. */\n  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n  /** Used to detect binary string values. */\n  var reIsBinary = /^0b[01]+$/i;\n\n  /** Used to detect host constructors (Safari). */\n  var reIsHostCtor = /^\\[object .+?Constructor\\]$/;\n\n  /** Used to detect octal string values. */\n  var reIsOctal = /^0o[0-7]+$/i;\n\n  /** Used to detect unsigned integer values. */\n  var reIsUint = /^(?:0|[1-9]\\d*)$/;\n\n  /** Used to match Latin Unicode letters (excluding mathematical operators). */\n  var reLatin = /[\\xc0-\\xd6\\xd8-\\xf6\\xf8-\\xff\\u0100-\\u017f]/g;\n\n  /** Used to ensure capturing order of template delimiters. */\n  var reNoMatch = /($^)/;\n\n  /** Used to match unescaped characters in compiled string literals. */\n  var reUnescapedString = /['\\n\\r\\u2028\\u2029\\\\]/g;\n\n  /** Used to compose unicode character classes. */\n  var rsAstralRange = '\\\\ud800-\\\\udfff',\n      rsComboMarksRange = '\\\\u0300-\\\\u036f',\n      reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n      rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n      rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,\n      rsDingbatRange = '\\\\u2700-\\\\u27bf',\n      rsLowerRange = 'a-z\\\\xdf-\\\\xf6\\\\xf8-\\\\xff',\n      rsMathOpRange = '\\\\xac\\\\xb1\\\\xd7\\\\xf7',\n      rsNonCharRange = '\\\\x00-\\\\x2f\\\\x3a-\\\\x40\\\\x5b-\\\\x60\\\\x7b-\\\\xbf',\n      rsPunctuationRange = '\\\\u2000-\\\\u206f',\n      rsSpaceRange = ' \\\\t\\\\x0b\\\\f\\\\xa0\\\\ufeff\\\\n\\\\r\\\\u2028\\\\u2029\\\\u1680\\\\u180e\\\\u2000\\\\u2001\\\\u2002\\\\u2003\\\\u2004\\\\u2005\\\\u2006\\\\u2007\\\\u2008\\\\u2009\\\\u200a\\\\u202f\\\\u205f\\\\u3000',\n      rsUpperRange = 'A-Z\\\\xc0-\\\\xd6\\\\xd8-\\\\xde',\n      rsVarRange = '\\\\ufe0e\\\\ufe0f',\n      rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;\n\n  /** Used to compose unicode capture groups. */\n  var rsApos = \"['\\u2019]\",\n      rsAstral = '[' + rsAstralRange + ']',\n      rsBreak = '[' + rsBreakRange + ']',\n      rsCombo = '[' + rsComboRange + ']',\n      rsDigits = '\\\\d+',\n      rsDingbat = '[' + rsDingbatRange + ']',\n      rsLower = '[' + rsLowerRange + ']',\n      rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',\n      rsFitz = '\\\\ud83c[\\\\udffb-\\\\udfff]',\n      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',\n      rsNonAstral = '[^' + rsAstralRange + ']',\n      rsRegional = '(?:\\\\ud83c[\\\\udde6-\\\\uddff]){2}',\n      rsSurrPair = '[\\\\ud800-\\\\udbff][\\\\udc00-\\\\udfff]',\n      rsUpper = '[' + rsUpperRange + ']',\n      rsZWJ = '\\\\u200d';\n\n  /** Used to compose unicode regexes. */\n  var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',\n      rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',\n      rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',\n      rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',\n      reOptMod = rsModifier + '?',\n      rsOptVar = '[' + rsVarRange + ']?',\n      rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',\n      rsOrdLower = '\\\\d*(?:(?:1st|2nd|3rd|(?![123])\\\\dth)\\\\b)',\n      rsOrdUpper = '\\\\d*(?:(?:1ST|2ND|3RD|(?![123])\\\\dTH)\\\\b)',\n      rsSeq = rsOptVar + reOptMod + rsOptJoin,\n      rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,\n      rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';\n\n  /** Used to match apostrophes. */\n  var reApos = RegExp(rsApos, 'g');\n\n  /**\n   * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and\n   * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).\n   */\n  var reComboMark = RegExp(rsCombo, 'g');\n\n  /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */\n  var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');\n\n  /** Used to match complex or compound words. */\n  var reUnicodeWord = RegExp([\n    rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',\n    rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',\n    rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,\n    rsUpper + '+' + rsOptContrUpper,\n    rsOrdUpper,\n    rsOrdLower,\n    rsDigits,\n    rsEmoji\n  ].join('|'), 'g');\n\n  /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */\n  var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboRange + rsVarRange + ']');\n\n  /** Used to detect strings that need a more robust regexp to match words. */\n  var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;\n\n  /** Used to assign default `context` object properties. */\n  var contextProps = [\n    'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',\n    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',\n    'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',\n    'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',\n    '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'\n  ];\n\n  /** Used to make template sourceURLs easier to identify. */\n  var templateCounter = -1;\n\n  /** Used to identify `toStringTag` values of typed arrays. */\n  var typedArrayTags = {};\n  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =\n  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =\n  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =\n  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =\n  typedArrayTags[uint32Tag] = true;\n  typedArrayTags[argsTag] = typedArrayTags[arrayTag] =\n  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =\n  typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =\n  typedArrayTags[errorTag] = typedArrayTags[funcTag] =\n  typedArrayTags[mapTag] = typedArrayTags[numberTag] =\n  typedArrayTags[objectTag] = typedArrayTags[regexpTag] =\n  typedArrayTags[setTag] = typedArrayTags[stringTag] =\n  typedArrayTags[weakMapTag] = false;\n\n  /** Used to identify `toStringTag` values supported by `_.clone`. */\n  var cloneableTags = {};\n  cloneableTags[argsTag] = cloneableTags[arrayTag] =\n  cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =\n  cloneableTags[boolTag] = cloneableTags[dateTag] =\n  cloneableTags[float32Tag] = cloneableTags[float64Tag] =\n  cloneableTags[int8Tag] = cloneableTags[int16Tag] =\n  cloneableTags[int32Tag] = cloneableTags[mapTag] =\n  cloneableTags[numberTag] = cloneableTags[objectTag] =\n  cloneableTags[regexpTag] = cloneableTags[setTag] =\n  cloneableTags[stringTag] = cloneableTags[symbolTag] =\n  cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =\n  cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;\n  cloneableTags[errorTag] = cloneableTags[funcTag] =\n  cloneableTags[weakMapTag] = false;\n\n  /** Used to map Latin Unicode letters to basic Latin letters. */\n  var deburredLetters = {\n    // Latin-1 Supplement block.\n    '\\xc0': 'A',  '\\xc1': 'A', '\\xc2': 'A', '\\xc3': 'A', '\\xc4': 'A', '\\xc5': 'A',\n    '\\xe0': 'a',  '\\xe1': 'a', '\\xe2': 'a', '\\xe3': 'a', '\\xe4': 'a', '\\xe5': 'a',\n    '\\xc7': 'C',  '\\xe7': 'c',\n    '\\xd0': 'D',  '\\xf0': 'd',\n    '\\xc8': 'E',  '\\xc9': 'E', '\\xca': 'E', '\\xcb': 'E',\n    '\\xe8': 'e',  '\\xe9': 'e', '\\xea': 'e', '\\xeb': 'e',\n    '\\xcc': 'I',  '\\xcd': 'I', '\\xce': 'I', '\\xcf': 'I',\n    '\\xec': 'i',  '\\xed': 'i', '\\xee': 'i', '\\xef': 'i',\n    '\\xd1': 'N',  '\\xf1': 'n',\n    '\\xd2': 'O',  '\\xd3': 'O', '\\xd4': 'O', '\\xd5': 'O', '\\xd6': 'O', '\\xd8': 'O',\n    '\\xf2': 'o',  '\\xf3': 'o', '\\xf4': 'o', '\\xf5': 'o', '\\xf6': 'o', '\\xf8': 'o',\n    '\\xd9': 'U',  '\\xda': 'U', '\\xdb': 'U', '\\xdc': 'U',\n    '\\xf9': 'u',  '\\xfa': 'u', '\\xfb': 'u', '\\xfc': 'u',\n    '\\xdd': 'Y',  '\\xfd': 'y', '\\xff': 'y',\n    '\\xc6': 'Ae', '\\xe6': 'ae',\n    '\\xde': 'Th', '\\xfe': 'th',\n    '\\xdf': 'ss',\n    // Latin Extended-A block.\n    '\\u0100': 'A',  '\\u0102': 'A', '\\u0104': 'A',\n    '\\u0101': 'a',  '\\u0103': 'a', '\\u0105': 'a',\n    '\\u0106': 'C',  '\\u0108': 'C', '\\u010a': 'C', '\\u010c': 'C',\n    '\\u0107': 'c',  '\\u0109': 'c', '\\u010b': 'c', '\\u010d': 'c',\n    '\\u010e': 'D',  '\\u0110': 'D', '\\u010f': 'd', '\\u0111': 'd',\n    '\\u0112': 'E',  '\\u0114': 'E', '\\u0116': 'E', '\\u0118': 'E', '\\u011a': 'E',\n    '\\u0113': 'e',  '\\u0115': 'e', '\\u0117': 'e', '\\u0119': 'e', '\\u011b': 'e',\n    '\\u011c': 'G',  '\\u011e': 'G', '\\u0120': 'G', '\\u0122': 'G',\n    '\\u011d': 'g',  '\\u011f': 'g', '\\u0121': 'g', '\\u0123': 'g',\n    '\\u0124': 'H',  '\\u0126': 'H', '\\u0125': 'h', '\\u0127': 'h',\n    '\\u0128': 'I',  '\\u012a': 'I', '\\u012c': 'I', '\\u012e': 'I', '\\u0130': 'I',\n    '\\u0129': 'i',  '\\u012b': 'i', '\\u012d': 'i', '\\u012f': 'i', '\\u0131': 'i',\n    '\\u0134': 'J',  '\\u0135': 'j',\n    '\\u0136': 'K',  '\\u0137': 'k', '\\u0138': 'k',\n    '\\u0139': 'L',  '\\u013b': 'L', '\\u013d': 'L', '\\u013f': 'L', '\\u0141': 'L',\n    '\\u013a': 'l',  '\\u013c': 'l', '\\u013e': 'l', '\\u0140': 'l', '\\u0142': 'l',\n    '\\u0143': 'N',  '\\u0145': 'N', '\\u0147': 'N', '\\u014a': 'N',\n    '\\u0144': 'n',  '\\u0146': 'n', '\\u0148': 'n', '\\u014b': 'n',\n    '\\u014c': 'O',  '\\u014e': 'O', '\\u0150': 'O',\n    '\\u014d': 'o',  '\\u014f': 'o', '\\u0151': 'o',\n    '\\u0154': 'R',  '\\u0156': 'R', '\\u0158': 'R',\n    '\\u0155': 'r',  '\\u0157': 'r', '\\u0159': 'r',\n    '\\u015a': 'S',  '\\u015c': 'S', '\\u015e': 'S', '\\u0160': 'S',\n    '\\u015b': 's',  '\\u015d': 's', '\\u015f': 's', '\\u0161': 's',\n    '\\u0162': 'T',  '\\u0164': 'T', '\\u0166': 'T',\n    '\\u0163': 't',  '\\u0165': 't', '\\u0167': 't',\n    '\\u0168': 'U',  '\\u016a': 'U', '\\u016c': 'U', '\\u016e': 'U', '\\u0170': 'U', '\\u0172': 'U',\n    '\\u0169': 'u',  '\\u016b': 'u', '\\u016d': 'u', '\\u016f': 'u', '\\u0171': 'u', '\\u0173': 'u',\n    '\\u0174': 'W',  '\\u0175': 'w',\n    '\\u0176': 'Y',  '\\u0177': 'y', '\\u0178': 'Y',\n    '\\u0179': 'Z',  '\\u017b': 'Z', '\\u017d': 'Z',\n    '\\u017a': 'z',  '\\u017c': 'z', '\\u017e': 'z',\n    '\\u0132': 'IJ', '\\u0133': 'ij',\n    '\\u0152': 'Oe', '\\u0153': 'oe',\n    '\\u0149': \"'n\", '\\u017f': 's'\n  };\n\n  /** Used to map characters to HTML entities. */\n  var htmlEscapes = {\n    '&': '&amp;',\n    '<': '&lt;',\n    '>': '&gt;',\n    '\"': '&quot;',\n    \"'\": '&#39;'\n  };\n\n  /** Used to map HTML entities to characters. */\n  var htmlUnescapes = {\n    '&amp;': '&',\n    '&lt;': '<',\n    '&gt;': '>',\n    '&quot;': '\"',\n    '&#39;': \"'\"\n  };\n\n  /** Used to escape characters for inclusion in compiled string literals. */\n  var stringEscapes = {\n    '\\\\': '\\\\',\n    \"'\": \"'\",\n    '\\n': 'n',\n    '\\r': 'r',\n    '\\u2028': 'u2028',\n    '\\u2029': 'u2029'\n  };\n\n  /** Built-in method references without a dependency on `root`. */\n  var freeParseFloat = parseFloat,\n      freeParseInt = parseInt;\n\n  /** Detect free variable `global` from Node.js. */\n  var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\n  /** Detect free variable `self`. */\n  var freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n  /** Used as a reference to the global object. */\n  var root = freeGlobal || freeSelf || Function('return this')();\n\n  /** Detect free variable `exports`. */\n  var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n  /** Detect free variable `module`. */\n  var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n  /** Detect the popular CommonJS extension `module.exports`. */\n  var moduleExports = freeModule && freeModule.exports === freeExports;\n\n  /** Detect free variable `process` from Node.js. */\n  var freeProcess = moduleExports && freeGlobal.process;\n\n  /** Used to access faster Node.js helpers. */\n  var nodeUtil = (function() {\n    try {\n      return freeProcess && freeProcess.binding && freeProcess.binding('util');\n    } catch (e) {}\n  }());\n\n  /* Node.js helper references. */\n  var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,\n      nodeIsDate = nodeUtil && nodeUtil.isDate,\n      nodeIsMap = nodeUtil && nodeUtil.isMap,\n      nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,\n      nodeIsSet = nodeUtil && nodeUtil.isSet,\n      nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;\n\n  /*--------------------------------------------------------------------------*/\n\n  /**\n   * Adds the key-value `pair` to `map`.\n   *\n   * @private\n   * @param {Object} map The map to modify.\n   * @param {Array} pair The key-value pair to add.\n   * @returns {Object} Returns `map`.\n   */\n  function addMapEntry(map, pair) {\n    // Don't return `map.set` because it's not chainable in IE 11.\n    map.set(pair[0], pair[1]);\n    return map;\n  }\n\n  /**\n   * Adds `value` to `set`.\n   *\n   * @private\n   * @param {Object} set The set to modify.\n   * @param {*} value The value to add.\n   * @returns {Object} Returns `set`.\n   */\n  function addSetEntry(set, value) {\n    // Don't return `set.add` because it's not chainable in IE 11.\n    set.add(value);\n    return set;\n  }\n\n  /**\n   * A faster alternative to `Function#apply`, this function invokes `func`\n   * with the `this` binding of `thisArg` and the arguments of `args`.\n   *\n   * @private\n   * @param {Function} func The function to invoke.\n   * @param {*} thisArg The `this` binding of `func`.\n   * @param {Array} args The arguments to invoke `func` with.\n   * @returns {*} Returns the result of `func`.\n   */\n  function apply(func, thisArg, args) {\n    switch (args.length) {\n      case 0: return func.call(thisArg);\n      case 1: return func.call(thisArg, args[0]);\n      case 2: return func.call(thisArg, args[0], args[1]);\n      case 3: return func.call(thisArg, args[0], args[1], args[2]);\n    }\n    return func.apply(thisArg, args);\n  }\n\n  /**\n   * A specialized version of `baseAggregator` for arrays.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} setter The function to set `accumulator` values.\n   * @param {Function} iteratee The iteratee to transform keys.\n   * @param {Object} accumulator The initial aggregated object.\n   * @returns {Function} Returns `accumulator`.\n   */\n  function arrayAggregator(array, setter, iteratee, accumulator) {\n    var index = -1,\n        length = array == null ? 0 : array.length;\n\n    while (++index < length) {\n      var value = array[index];\n      setter(accumulator, value, iteratee(value), array);\n    }\n    return accumulator;\n  }\n\n  /**\n   * A specialized version of `_.forEach` for arrays without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @returns {Array} Returns `array`.\n   */\n  function arrayEach(array, iteratee) {\n    var index = -1,\n        length = array == null ? 0 : array.length;\n\n    while (++index < length) {\n      if (iteratee(array[index], index, array) === false) {\n        break;\n      }\n    }\n    return array;\n  }\n\n  /**\n   * A specialized version of `_.forEachRight` for arrays without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @returns {Array} Returns `array`.\n   */\n  function arrayEachRight(array, iteratee) {\n    var length = array == null ? 0 : array.length;\n\n    while (length--) {\n      if (iteratee(array[length], length, array) === false) {\n        break;\n      }\n    }\n    return array;\n  }\n\n  /**\n   * A specialized version of `_.every` for arrays without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} predicate The function invoked per iteration.\n   * @returns {boolean} Returns `true` if all elements pass the predicate check,\n   *  else `false`.\n   */\n  function arrayEvery(array, predicate) {\n    var index = -1,\n        length = array == null ? 0 : array.length;\n\n    while (++index < length) {\n      if (!predicate(array[index], index, array)) {\n        return false;\n      }\n    }\n    return true;\n  }\n\n  /**\n   * A specialized version of `_.filter` for arrays without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} predicate The function invoked per iteration.\n   * @returns {Array} Returns the new filtered array.\n   */\n  function arrayFilter(array, predicate) {\n    var index = -1,\n        length = array == null ? 0 : array.length,\n        resIndex = 0,\n        result = [];\n\n    while (++index < length) {\n      var value = array[index];\n      if (predicate(value, index, array)) {\n        result[resIndex++] = value;\n      }\n    }\n    return result;\n  }\n\n  /**\n   * A specialized version of `_.includes` for arrays without support for\n   * specifying an index to search from.\n   *\n   * @private\n   * @param {Array} [array] The array to inspect.\n   * @param {*} target The value to search for.\n   * @returns {boolean} Returns `true` if `target` is found, else `false`.\n   */\n  function arrayIncludes(array, value) {\n    var length = array == null ? 0 : array.length;\n    return !!length && baseIndexOf(array, value, 0) > -1;\n  }\n\n  /**\n   * This function is like `arrayIncludes` except that it accepts a comparator.\n   *\n   * @private\n   * @param {Array} [array] The array to inspect.\n   * @param {*} target The value to search for.\n   * @param {Function} comparator The comparator invoked per element.\n   * @returns {boolean} Returns `true` if `target` is found, else `false`.\n   */\n  function arrayIncludesWith(array, value, comparator) {\n    var index = -1,\n        length = array == null ? 0 : array.length;\n\n    while (++index < length) {\n      if (comparator(value, array[index])) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /**\n   * A specialized version of `_.map` for arrays without support for iteratee\n   * shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @returns {Array} Returns the new mapped array.\n   */\n  function arrayMap(array, iteratee) {\n    var index = -1,\n        length = array == null ? 0 : array.length,\n        result = Array(length);\n\n    while (++index < length) {\n      result[index] = iteratee(array[index], index, array);\n    }\n    return result;\n  }\n\n  /**\n   * Appends the elements of `values` to `array`.\n   *\n   * @private\n   * @param {Array} array The array to modify.\n   * @param {Array} values The values to append.\n   * @returns {Array} Returns `array`.\n   */\n  function arrayPush(array, values) {\n    var index = -1,\n        length = values.length,\n        offset = array.length;\n\n    while (++index < length) {\n      array[offset + index] = values[index];\n    }\n    return array;\n  }\n\n  /**\n   * A specialized version of `_.reduce` for arrays without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @param {*} [accumulator] The initial value.\n   * @param {boolean} [initAccum] Specify using the first element of `array` as\n   *  the initial value.\n   * @returns {*} Returns the accumulated value.\n   */\n  function arrayReduce(array, iteratee, accumulator, initAccum) {\n    var index = -1,\n        length = array == null ? 0 : array.length;\n\n    if (initAccum && length) {\n      accumulator = array[++index];\n    }\n    while (++index < length) {\n      accumulator = iteratee(accumulator, array[index], index, array);\n    }\n    return accumulator;\n  }\n\n  /**\n   * A specialized version of `_.reduceRight` for arrays without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @param {*} [accumulator] The initial value.\n   * @param {boolean} [initAccum] Specify using the last element of `array` as\n   *  the initial value.\n   * @returns {*} Returns the accumulated value.\n   */\n  function arrayReduceRight(array, iteratee, accumulator, initAccum) {\n    var length = array == null ? 0 : array.length;\n    if (initAccum && length) {\n      accumulator = array[--length];\n    }\n    while (length--) {\n      accumulator = iteratee(accumulator, array[length], length, array);\n    }\n    return accumulator;\n  }\n\n  /**\n   * A specialized version of `_.some` for arrays without support for iteratee\n   * shorthands.\n   *\n   * @private\n   * @param {Array} [array] The array to iterate over.\n   * @param {Function} predicate The function invoked per iteration.\n   * @returns {boolean} Returns `true` if any element passes the predicate check,\n   *  else `false`.\n   */\n  function arraySome(array, predicate) {\n    var index = -1,\n        length = array == null ? 0 : array.length;\n\n    while (++index < length) {\n      if (predicate(array[index], index, array)) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  /**\n   * Gets the size of an ASCII `string`.\n   *\n   * @private\n   * @param {string} string The string inspect.\n   * @returns {number} Returns the string size.\n   */\n  var asciiSize = baseProperty('length');\n\n  /**\n   * Converts an ASCII `string` to an array.\n   *\n   * @private\n   * @param {string} string The string to convert.\n   * @returns {Array} Returns the converted array.\n   */\n  function asciiToArray(string) {\n    return string.split('');\n  }\n\n  /**\n   * Splits an ASCII `string` into an array of its words.\n   *\n   * @private\n   * @param {string} The string to inspect.\n   * @returns {Array} Returns the words of `string`.\n   */\n  function asciiWords(string) {\n    return string.match(reAsciiWord) || [];\n  }\n\n  /**\n   * The base implementation of methods like `_.findKey` and `_.findLastKey`,\n   * without support for iteratee shorthands, which iterates over `collection`\n   * using `eachFunc`.\n   *\n   * @private\n   * @param {Array|Object} collection The collection to inspect.\n   * @param {Function} predicate The function invoked per iteration.\n   * @param {Function} eachFunc The function to iterate over `collection`.\n   * @returns {*} Returns the found element or its key, else `undefined`.\n   */\n  function baseFindKey(collection, predicate, eachFunc) {\n    var result;\n    eachFunc(collection, function(value, key, collection) {\n      if (predicate(value, key, collection)) {\n        result = key;\n        return false;\n      }\n    });\n    return result;\n  }\n\n  /**\n   * The base implementation of `_.findIndex` and `_.findLastIndex` without\n   * support for iteratee shorthands.\n   *\n   * @private\n   * @param {Array} array The array to inspect.\n   * @param {Function} predicate The function invoked per iteration.\n   * @param {number} fromIndex The index to search from.\n   * @param {boolean} [fromRight] Specify iterating from right to left.\n   * @returns {number} Returns the index of the matched value, else `-1`.\n   */\n  function baseFindIndex(array, predicate, fromIndex, fromRight) {\n    var length = array.length,\n        index = fromIndex + (fromRight ? 1 : -1);\n\n    while ((fromRight ? index-- : ++index < length)) {\n      if (predicate(array[index], index, array)) {\n        return index;\n      }\n    }\n    return -1;\n  }\n\n  /**\n   * The base implementation of `_.indexOf` without `fromIndex` bounds checks.\n   *\n   * @private\n   * @param {Array} array The array to inspect.\n   * @param {*} value The value to search for.\n   * @param {number} fromIndex The index to search from.\n   * @returns {number} Returns the index of the matched value, else `-1`.\n   */\n  function baseIndexOf(array, value, fromIndex) {\n    return value === value\n      ? strictIndexOf(array, value, fromIndex)\n      : baseFindIndex(array, baseIsNaN, fromIndex);\n  }\n\n  /**\n   * This function is like `baseIndexOf` except that it accepts a comparator.\n   *\n   * @private\n   * @param {Array} array The array to inspect.\n   * @param {*} value The value to search for.\n   * @param {number} fromIndex The index to search from.\n   * @param {Function} comparator The comparator invoked per element.\n   * @returns {number} Returns the index of the matched value, else `-1`.\n   */\n  function baseIndexOfWith(array, value, fromIndex, comparator) {\n    var index = fromIndex - 1,\n        length = array.length;\n\n    while (++index < length) {\n      if (comparator(array[index], value)) {\n        return index;\n      }\n    }\n    return -1;\n  }\n\n  /**\n   * The base implementation of `_.isNaN` without support for number objects.\n   *\n   * @private\n   * @param {*} value The value to check.\n   * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.\n   */\n  function baseIsNaN(value) {\n    return value !== value;\n  }\n\n  /**\n   * The base implementation of `_.mean` and `_.meanBy` without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} array The array to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @returns {number} Returns the mean.\n   */\n  function baseMean(array, iteratee) {\n    var length = array == null ? 0 : array.length;\n    return length ? (baseSum(array, iteratee) / length) : NAN;\n  }\n\n  /**\n   * The base implementation of `_.property` without support for deep paths.\n   *\n   * @private\n   * @param {string} key The key of the property to get.\n   * @returns {Function} Returns the new accessor function.\n   */\n  function baseProperty(key) {\n    return function(object) {\n      return object == null ? undefined : object[key];\n    };\n  }\n\n  /**\n   * The base implementation of `_.propertyOf` without support for deep paths.\n   *\n   * @private\n   * @param {Object} object The object to query.\n   * @returns {Function} Returns the new accessor function.\n   */\n  function basePropertyOf(object) {\n    return function(key) {\n      return object == null ? undefined : object[key];\n    };\n  }\n\n  /**\n   * The base implementation of `_.reduce` and `_.reduceRight`, without support\n   * for iteratee shorthands, which iterates over `collection` using `eachFunc`.\n   *\n   * @private\n   * @param {Array|Object} collection The collection to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @param {*} accumulator The initial value.\n   * @param {boolean} initAccum Specify using the first or last element of\n   *  `collection` as the initial value.\n   * @param {Function} eachFunc The function to iterate over `collection`.\n   * @returns {*} Returns the accumulated value.\n   */\n  function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {\n    eachFunc(collection, function(value, index, collection) {\n      accumulator = initAccum\n        ? (initAccum = false, value)\n        : iteratee(accumulator, value, index, collection);\n    });\n    return accumulator;\n  }\n\n  /**\n   * The base implementation of `_.sortBy` which uses `comparer` to define the\n   * sort order of `array` and replaces criteria objects with their corresponding\n   * values.\n   *\n   * @private\n   * @param {Array} array The array to sort.\n   * @param {Function} comparer The function to define sort order.\n   * @returns {Array} Returns `array`.\n   */\n  function baseSortBy(array, comparer) {\n    var length = array.length;\n\n    array.sort(comparer);\n    while (length--) {\n      array[length] = array[length].value;\n    }\n    return array;\n  }\n\n  /**\n   * The base implementation of `_.sum` and `_.sumBy` without support for\n   * iteratee shorthands.\n   *\n   * @private\n   * @param {Array} array The array to iterate over.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @returns {number} Returns the sum.\n   */\n  function baseSum(array, iteratee) {\n    var result,\n        index = -1,\n        length = array.length;\n\n    while (++index < length) {\n      var current = iteratee(array[index]);\n      if (current !== undefined) {\n        result = result === undefined ? current : (result + current);\n      }\n    }\n    return result;\n  }\n\n  /**\n   * The base implementation of `_.times` without support for iteratee shorthands\n   * or max array length checks.\n   *\n   * @private\n   * @param {number} n The number of times to invoke `iteratee`.\n   * @param {Function} iteratee The function invoked per iteration.\n   * @returns {Array} Returns the array of results.\n   */\n  function baseTimes(n, iteratee) {\n    var index = -1,\n        result = Array(n);\n\n    while (++index < n) {\n      result[index] = iteratee(index);\n    }\n    return result;\n  }\n\n  /**\n   * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array\n   * of key-value pairs for `object` corresponding to the property names of `props`.\n   *\n   * @private\n   * @param {Object} object The object to query.\n   * @param {Array} props The property names to get values for.\n   * @returns {Object} Returns the key-value pairs.\n   */\n  function baseToPairs(object, props) {\n    return arrayMap(props, function(key) {\n      return [key, object[key]];\n    });\n  }\n\n  /**\n   * The base implementation of `_.unary` without support for storing metadata.\n   *\n   * @private\n   * @param {Function} func The function to cap arguments for.\n   * @returns {Function} Returns the new capped function.\n   */\n  function baseUnary(func) {\n    return function(value) {\n      return func(value);\n    };\n  }\n\n  /**\n   * The base implementation of `_.values` and `_.valuesIn` which creates an\n   * array of `object` property values corresponding to the property names\n   * of `props`.\n   *\n   * @private\n   * @param {Object} object The object to query.\n   * @param {Array} props The property names to get values for.\n   * @returns {Object} Returns the array of property values.\n   */\n  function baseValues(object, props) {\n    return arrayMap(props, function(key) {\n      return object[key];\n    });\n  }\n\n  /**\n   * Checks if a `cache` value for `key` exists.\n   *\n   * @private\n   * @param {Object} cache The cache to query.\n   * @param {string} key The key of the entry to check.\n   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n   */\n  function cacheHas(cache, key) {\n    return cache.has(key);\n  }\n\n  /**\n   * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol\n   * that is not found in the character symbols.\n   *\n   * @private\n   * @param {Array} strSymbols The string symbols to inspect.\n   * @param {Array} chrSymbols The character symbols to find.\n   * @returns {number} Returns the index of the first unmatched string symbol.\n   */\n  function charsStartIndex(strSymbols, chrSymbols) {\n    var index = -1,\n        length = strSymbols.length;\n\n    while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}\n    return index;\n  }\n\n  /**\n   * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol\n   * that is not found in the character symbols.\n   *\n   * @private\n   * @param {Array} strSymbols The string symbols to inspect.\n   * @param {Array} chrSymbols The character symbols to find.\n   * @returns {number} Returns the index of the last unmatched string symbol.\n   */\n  function charsEndIndex(strSymbols, chrSymbols) {\n    var index = strSymbols.length;\n\n    while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}\n    return index;\n  }\n\n  /**\n   * Gets the number of `placeholder` occurrences in `array`.\n   *\n   * @private\n   * @param {Array} array The array to inspect.\n   * @param {*} placeholder The placeholder to search for.\n   * @returns {number} Returns the placeholder count.\n   */\n  function countHolders(array, placeholder) {\n    var length = array.length,\n        result = 0;\n\n    while (length--) {\n      if (array[length] === placeholder) {\n        ++result;\n      }\n    }\n    return result;\n  }\n\n  /**\n   * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A\n   * letters to basic Latin letters.\n   *\n   * @private\n   * @param {string} letter The matched letter to deburr.\n   * @returns {string} Returns the deburred letter.\n   */\n  var deburrLetter = basePropertyOf(deburredLetters);\n\n  /**\n   * Used by `_.escape` to convert characters to HTML entities.\n   *\n   * @private\n   * @param {string} chr The matched character to escape.\n   * @returns {string} Returns the escaped character.\n   */\n  var escapeHtmlChar = basePropertyOf(htmlEscapes);\n\n  /**\n   * Used by `_.template` to escape characters for inclusion in compiled string literals.\n   *\n   * @private\n   * @param {string} chr The matched character to escape.\n   * @returns {string} Returns the escaped character.\n   */\n  function escapeStringChar(chr) {\n    return '\\\\' + stringEscapes[chr];\n  }\n\n  /**\n   * Gets the value at `key` of `object`.\n   *\n   * @private\n   * @param {Object} [object] The object to query.\n   * @param {string} key The key of the property to get.\n   * @returns {*} Returns the property value.\n   */\n  function getValue(object, key) {\n    return object == null ? undefined : object[key];\n  }\n\n  /**\n   * Checks if `string` contains Unicode symbols.\n   *\n   * @private\n   * @param {string} string The string to inspect.\n   * @returns {boolean} Returns `true` if a symbol is found, else `false`.\n   */\n  function hasUnicode(string) {\n    return reHasUnicode.test(string);\n  }\n\n  /**\n   * Checks if `string` contains a word composed of Unicode symbols.\n   *\n   * @private\n   * @param {string} string The string to inspect.\n   * @returns {boolean} Returns `true` if a word is found, else `false`.\n   */\n  function hasUnicodeWord(string) {\n    return reHasUnicodeWord.test(string);\n  }\n\n  /**\n   * Converts `iterator` to an array.\n   *\n   * @private\n   * @param {Object} iterator The iterator to convert.\n   * @returns {Array} Returns the converted array.\n   */\n  function iteratorToArray(iterator) {\n    var data,\n        result = [];\n\n    while (!(data = iterator.next()).done) {\n      result.push(data.value);\n    }\n    return result;\n  }\n\n  /**\n   * Converts `map` to its key-value pairs.\n   *\n   * @private\n   * @param {Object} map The map to convert.\n   * @returns {Array} Returns the key-value pairs.\n   */\n  function mapToArray(map) {\n    var index = -1,\n        result = Array(map.size);\n\n    map.forEach(function(value, key) {\n      result[++index] = [key, value];\n    });\n    return result;\n  }\n\n  /**\n   * Creates a unary function that invokes `func` with its argument transformed.\n   *\n   * @private\n   * @param {Function} func The function to wrap.\n   * @param {Function} transform The argument transform.\n   * @returns {Function} Returns the new function.\n   */\n  function overArg(func, transform) {\n    return function(arg) {\n      return func(transform(arg));\n    };\n  }\n\n  /**\n   * Replaces all `placeholder` elements in `array` with an internal placeholder\n   * and returns an array of their indexes.\n   *\n   * @private\n   * @param {Array} array The array to modify.\n   * @param {*} placeholder The placeholder to replace.\n   * @returns {Array} Returns the new array of placeholder indexes.\n   */\n  function replaceHolders(array, placeholder) {\n    var index = -1,\n        length = array.length,\n        resIndex = 0,\n        result = [];\n\n    while (++index < length) {\n      var value = array[index];\n      if (value === placeholder || value === PLACEHOLDER) {\n        array[index] = PLACEHOLDER;\n        result[resIndex++] = index;\n      }\n    }\n    return result;\n  }\n\n  /**\n   * Converts `set` to an array of its values.\n   *\n   * @private\n   * @param {Object} set The set to convert.\n   * @returns {Array} Returns the values.\n   */\n  function setToArray(set) {\n    var index = -1,\n        result = Array(set.size);\n\n    set.forEach(function(value) {\n      result[++index] = value;\n    });\n    return result;\n  }\n\n  /**\n   * Converts `set` to its value-value pairs.\n   *\n   * @private\n   * @param {Object} set The set to convert.\n   * @returns {Array} Returns the value-value pairs.\n   */\n  function setToPairs(set) {\n    var index = -1,\n        result = Array(set.size);\n\n    set.forEach(function(value) {\n      result[++index] = [value, value];\n    });\n    return result;\n  }\n\n  /**\n   * A specialized version of `_.indexOf` which performs strict equality\n   * comparisons of values, i.e. `===`.\n   *\n   * @private\n   * @param {Array} array The array to inspect.\n   * @param {*} value The value to search for.\n   * @param {number} fromIndex The index to search from.\n   * @returns {number} Returns the index of the matched value, else `-1`.\n   */\n  function strictIndexOf(array, value, fromIndex) {\n    var index = fromIndex - 1,\n        length = array.length;\n\n    while (++index < length) {\n      if (array[index] === value) {\n        return index;\n      }\n    }\n    return -1;\n  }\n\n  /**\n   * A specialized version of `_.lastIndexOf` which performs strict equality\n   * comparisons of values, i.e. `===`.\n   *\n   * @private\n   * @param {Array} array The array to inspect.\n   * @param {*} value The value to search for.\n   * @param {number} fromIndex The index to search from.\n   * @returns {number} Returns the index of the matched value, else `-1`.\n   */\n  function strictLastIndexOf(array, value, fromIndex) {\n    var index = fromIndex + 1;\n    while (index--) {\n      if (array[index] === value) {\n        return index;\n      }\n    }\n    return index;\n  }\n\n  /**\n   * Gets the number of symbols in `string`.\n   *\n   * @private\n   * @param {string} string The string to inspect.\n   * @returns {number} Returns the string size.\n   */\n  function stringSize(string) {\n    return hasUnicode(string)\n      ? unicodeSize(string)\n      : asciiSize(string);\n  }\n\n  /**\n   * Converts `string` to an array.\n   *\n   * @private\n   * @param {string} string The string to convert.\n   * @returns {Array} Returns the converted array.\n   */\n  function stringToArray(string) {\n    return hasUnicode(string)\n      ? unicodeToArray(string)\n      : asciiToArray(string);\n  }\n\n  /**\n   * Used by `_.unescape` to convert HTML entities to characters.\n   *\n   * @private\n   * @param {string} chr The matched character to unescape.\n   * @returns {string} Returns the unescaped character.\n   */\n  var unescapeHtmlChar = basePropertyOf(htmlUnescapes);\n\n  /**\n   * Gets the size of a Unicode `string`.\n   *\n   * @private\n   * @param {string} string The string inspect.\n   * @returns {number} Returns the string size.\n   */\n  function unicodeSize(string) {\n    var result = reUnicode.lastIndex = 0;\n    while (reUnicode.test(string)) {\n      ++result;\n    }\n    return result;\n  }\n\n  /**\n   * Converts a Unicode `string` to an array.\n   *\n   * @private\n   * @param {string} string The string to convert.\n   * @returns {Array} Returns the converted array.\n   */\n  function unicodeToArray(string) {\n    return string.match(reUnicode) || [];\n  }\n\n  /**\n   * Splits a Unicode `string` into an array of its words.\n   *\n   * @private\n   * @param {string} The string to inspect.\n   * @returns {Array} Returns the words of `string`.\n   */\n  function unicodeWords(string) {\n    return string.match(reUnicodeWord) || [];\n  }\n\n  /*--------------------------------------------------------------------------*/\n\n  /**\n   * Create a new pristine `lodash` function using the `context` object.\n   *\n   * @static\n   * @memberOf _\n   * @since 1.1.0\n   * @category Util\n   * @param {Object} [context=root] The context object.\n   * @returns {Function} Returns a new `lodash` function.\n   * @example\n   *\n   * _.mixin({ 'foo': _.constant('foo') });\n   *\n   * var lodash = _.runInContext();\n   * lodash.mixin({ 'bar': lodash.constant('bar') });\n   *\n   * _.isFunction(_.foo);\n   * // => true\n   * _.isFunction(_.bar);\n   * // => false\n   *\n   * lodash.isFunction(lodash.foo);\n   * // => false\n   * lodash.isFunction(lodash.bar);\n   * // => true\n   *\n   * // Create a suped-up `defer` in Node.js.\n   * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;\n   */\n  var runInContext = (function runInContext(context) {\n    context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));\n\n    /** Built-in constructor references. */\n    var Array = context.Array,\n        Date = context.Date,\n        Error = context.Error,\n        Function = context.Function,\n        Math = context.Math,\n        Object = context.Object,\n        RegExp = context.RegExp,\n        String = context.String,\n        TypeError = context.TypeError;\n\n    /** Used for built-in method references. */\n    var arrayProto = Array.prototype,\n        funcProto = Function.prototype,\n        objectProto = Object.prototype;\n\n    /** Used to detect overreaching core-js shims. */\n    var coreJsData = context['__core-js_shared__'];\n\n    /** Used to resolve the decompiled source of functions. */\n    var funcToString = funcProto.toString;\n\n    /** Used to check objects for own properties. */\n    var hasOwnProperty = objectProto.hasOwnProperty;\n\n    /** Used to generate unique IDs. */\n    var idCounter = 0;\n\n    /** Used to detect methods masquerading as native. */\n    var maskSrcKey = (function() {\n      var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');\n      return uid ? ('Symbol(src)_1.' + uid) : '';\n    }());\n\n    /**\n     * Used to resolve the\n     * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n     * of values.\n     */\n    var nativeObjectToString = objectProto.toString;\n\n    /** Used to infer the `Object` constructor. */\n    var objectCtorString = funcToString.call(Object);\n\n    /** Used to restore the original `_` reference in `_.noConflict`. */\n    var oldDash = root._;\n\n    /** Used to detect if a method is native. */\n    var reIsNative = RegExp('^' +\n      funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\\\$&')\n      .replace(/hasOwnProperty|(function).*?(?=\\\\\\()| for .+?(?=\\\\\\])/g, '$1.*?') + '$'\n    );\n\n    /** Built-in value references. */\n    var Buffer = moduleExports ? context.Buffer : undefined,\n        Symbol = context.Symbol,\n        Uint8Array = context.Uint8Array,\n        allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,\n        getPrototype = overArg(Object.getPrototypeOf, Object),\n        objectCreate = Object.create,\n        propertyIsEnumerable = objectProto.propertyIsEnumerable,\n        splice = arrayProto.splice,\n        spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,\n        symIterator = Symbol ? Symbol.iterator : undefined,\n        symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n    var defineProperty = (function() {\n      try {\n        var func = getNative(Object, 'defineProperty');\n        func({}, '', {});\n        return func;\n      } catch (e) {}\n    }());\n\n    /** Mocked built-ins. */\n    var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,\n        ctxNow = Date && Date.now !== root.Date.now && Date.now,\n        ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;\n\n    /* Built-in method references for those with the same name as other `lodash` methods. */\n    var nativeCeil = Math.ceil,\n        nativeFloor = Math.floor,\n        nativeGetSymbols = Object.getOwnPropertySymbols,\n        nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,\n        nativeIsFinite = context.isFinite,\n        nativeJoin = arrayProto.join,\n        nativeKeys = overArg(Object.keys, Object),\n        nativeMax = Math.max,\n        nativeMin = Math.min,\n        nativeNow = Date.now,\n        nativeParseInt = context.parseInt,\n        nativeRandom = Math.random,\n        nativeReverse = arrayProto.reverse;\n\n    /* Built-in method references that are verified to be native. */\n    var DataView = getNative(context, 'DataView'),\n        Map = getNative(context, 'Map'),\n        Promise = getNative(context, 'Promise'),\n        Set = getNative(context, 'Set'),\n        WeakMap = getNative(context, 'WeakMap'),\n        nativeCreate = getNative(Object, 'create');\n\n    /** Used to store function metadata. */\n    var metaMap = WeakMap && new WeakMap;\n\n    /** Used to lookup unminified function names. */\n    var realNames = {};\n\n    /** Used to detect maps, sets, and weakmaps. */\n    var dataViewCtorString = toSource(DataView),\n        mapCtorString = toSource(Map),\n        promiseCtorString = toSource(Promise),\n        setCtorString = toSource(Set),\n        weakMapCtorString = toSource(WeakMap);\n\n    /** Used to convert symbols to primitives and strings. */\n    var symbolProto = Symbol ? Symbol.prototype : undefined,\n        symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,\n        symbolToString = symbolProto ? symbolProto.toString : undefined;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates a `lodash` object which wraps `value` to enable implicit method\n     * chain sequences. Methods that operate on and return arrays, collections,\n     * and functions can be chained together. Methods that retrieve a single value\n     * or may return a primitive value will automatically end the chain sequence\n     * and return the unwrapped value. Otherwise, the value must be unwrapped\n     * with `_#value`.\n     *\n     * Explicit chain sequences, which must be unwrapped with `_#value`, may be\n     * enabled using `_.chain`.\n     *\n     * The execution of chained methods is lazy, that is, it's deferred until\n     * `_#value` is implicitly or explicitly called.\n     *\n     * Lazy evaluation allows several methods to support shortcut fusion.\n     * Shortcut fusion is an optimization to merge iteratee calls; this avoids\n     * the creation of intermediate arrays and can greatly reduce the number of\n     * iteratee executions. Sections of a chain sequence qualify for shortcut\n     * fusion if the section is applied to an array and iteratees accept only\n     * one argument. The heuristic for whether a section qualifies for shortcut\n     * fusion is subject to change.\n     *\n     * Chaining is supported in custom builds as long as the `_#value` method is\n     * directly or indirectly included in the build.\n     *\n     * In addition to lodash methods, wrappers have `Array` and `String` methods.\n     *\n     * The wrapper `Array` methods are:\n     * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`\n     *\n     * The wrapper `String` methods are:\n     * `replace` and `split`\n     *\n     * The wrapper methods that support shortcut fusion are:\n     * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,\n     * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,\n     * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`\n     *\n     * The chainable wrapper methods are:\n     * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,\n     * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,\n     * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,\n     * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,\n     * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,\n     * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,\n     * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,\n     * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,\n     * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,\n     * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,\n     * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,\n     * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,\n     * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,\n     * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,\n     * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,\n     * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,\n     * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,\n     * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,\n     * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,\n     * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,\n     * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,\n     * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,\n     * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,\n     * `zipObject`, `zipObjectDeep`, and `zipWith`\n     *\n     * The wrapper methods that are **not** chainable by default are:\n     * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,\n     * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,\n     * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,\n     * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,\n     * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,\n     * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,\n     * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,\n     * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,\n     * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,\n     * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,\n     * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,\n     * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,\n     * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,\n     * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,\n     * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,\n     * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,\n     * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,\n     * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,\n     * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,\n     * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,\n     * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,\n     * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,\n     * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,\n     * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,\n     * `upperFirst`, `value`, and `words`\n     *\n     * @name _\n     * @constructor\n     * @category Seq\n     * @param {*} value The value to wrap in a `lodash` instance.\n     * @returns {Object} Returns the new `lodash` wrapper instance.\n     * @example\n     *\n     * function square(n) {\n     *   return n * n;\n     * }\n     *\n     * var wrapped = _([1, 2, 3]);\n     *\n     * // Returns an unwrapped value.\n     * wrapped.reduce(_.add);\n     * // => 6\n     *\n     * // Returns a wrapped value.\n     * var squares = wrapped.map(square);\n     *\n     * _.isArray(squares);\n     * // => false\n     *\n     * _.isArray(squares.value());\n     * // => true\n     */\n    function lodash(value) {\n      if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {\n        if (value instanceof LodashWrapper) {\n          return value;\n        }\n        if (hasOwnProperty.call(value, '__wrapped__')) {\n          return wrapperClone(value);\n        }\n      }\n      return new LodashWrapper(value);\n    }\n\n    /**\n     * The base implementation of `_.create` without support for assigning\n     * properties to the created object.\n     *\n     * @private\n     * @param {Object} proto The object to inherit from.\n     * @returns {Object} Returns the new object.\n     */\n    var baseCreate = (function() {\n      function object() {}\n      return function(proto) {\n        if (!isObject(proto)) {\n          return {};\n        }\n        if (objectCreate) {\n          return objectCreate(proto);\n        }\n        object.prototype = proto;\n        var result = new object;\n        object.prototype = undefined;\n        return result;\n      };\n    }());\n\n    /**\n     * The function whose prototype chain sequence wrappers inherit from.\n     *\n     * @private\n     */\n    function baseLodash() {\n      // No operation performed.\n    }\n\n    /**\n     * The base constructor for creating `lodash` wrapper objects.\n     *\n     * @private\n     * @param {*} value The value to wrap.\n     * @param {boolean} [chainAll] Enable explicit method chain sequences.\n     */\n    function LodashWrapper(value, chainAll) {\n      this.__wrapped__ = value;\n      this.__actions__ = [];\n      this.__chain__ = !!chainAll;\n      this.__index__ = 0;\n      this.__values__ = undefined;\n    }\n\n    /**\n     * By default, the template delimiters used by lodash are like those in\n     * embedded Ruby (ERB) as well as ES2015 template strings. Change the\n     * following template settings to use alternative delimiters.\n     *\n     * @static\n     * @memberOf _\n     * @type {Object}\n     */\n    lodash.templateSettings = {\n\n      /**\n       * Used to detect `data` property values to be HTML-escaped.\n       *\n       * @memberOf _.templateSettings\n       * @type {RegExp}\n       */\n      'escape': reEscape,\n\n      /**\n       * Used to detect code to be evaluated.\n       *\n       * @memberOf _.templateSettings\n       * @type {RegExp}\n       */\n      'evaluate': reEvaluate,\n\n      /**\n       * Used to detect `data` property values to inject.\n       *\n       * @memberOf _.templateSettings\n       * @type {RegExp}\n       */\n      'interpolate': reInterpolate,\n\n      /**\n       * Used to reference the data object in the template text.\n       *\n       * @memberOf _.templateSettings\n       * @type {string}\n       */\n      'variable': '',\n\n      /**\n       * Used to import variables into the compiled template.\n       *\n       * @memberOf _.templateSettings\n       * @type {Object}\n       */\n      'imports': {\n\n        /**\n         * A reference to the `lodash` function.\n         *\n         * @memberOf _.templateSettings.imports\n         * @type {Function}\n         */\n        '_': lodash\n      }\n    };\n\n    // Ensure wrappers are instances of `baseLodash`.\n    lodash.prototype = baseLodash.prototype;\n    lodash.prototype.constructor = lodash;\n\n    LodashWrapper.prototype = baseCreate(baseLodash.prototype);\n    LodashWrapper.prototype.constructor = LodashWrapper;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.\n     *\n     * @private\n     * @constructor\n     * @param {*} value The value to wrap.\n     */\n    function LazyWrapper(value) {\n      this.__wrapped__ = value;\n      this.__actions__ = [];\n      this.__dir__ = 1;\n      this.__filtered__ = false;\n      this.__iteratees__ = [];\n      this.__takeCount__ = MAX_ARRAY_LENGTH;\n      this.__views__ = [];\n    }\n\n    /**\n     * Creates a clone of the lazy wrapper object.\n     *\n     * @private\n     * @name clone\n     * @memberOf LazyWrapper\n     * @returns {Object} Returns the cloned `LazyWrapper` object.\n     */\n    function lazyClone() {\n      var result = new LazyWrapper(this.__wrapped__);\n      result.__actions__ = copyArray(this.__actions__);\n      result.__dir__ = this.__dir__;\n      result.__filtered__ = this.__filtered__;\n      result.__iteratees__ = copyArray(this.__iteratees__);\n      result.__takeCount__ = this.__takeCount__;\n      result.__views__ = copyArray(this.__views__);\n      return result;\n    }\n\n    /**\n     * Reverses the direction of lazy iteration.\n     *\n     * @private\n     * @name reverse\n     * @memberOf LazyWrapper\n     * @returns {Object} Returns the new reversed `LazyWrapper` object.\n     */\n    function lazyReverse() {\n      if (this.__filtered__) {\n        var result = new LazyWrapper(this);\n        result.__dir__ = -1;\n        result.__filtered__ = true;\n      } else {\n        result = this.clone();\n        result.__dir__ *= -1;\n      }\n      return result;\n    }\n\n    /**\n     * Extracts the unwrapped value from its lazy wrapper.\n     *\n     * @private\n     * @name value\n     * @memberOf LazyWrapper\n     * @returns {*} Returns the unwrapped value.\n     */\n    function lazyValue() {\n      var array = this.__wrapped__.value(),\n          dir = this.__dir__,\n          isArr = isArray(array),\n          isRight = dir < 0,\n          arrLength = isArr ? array.length : 0,\n          view = getView(0, arrLength, this.__views__),\n          start = view.start,\n          end = view.end,\n          length = end - start,\n          index = isRight ? end : (start - 1),\n          iteratees = this.__iteratees__,\n          iterLength = iteratees.length,\n          resIndex = 0,\n          takeCount = nativeMin(length, this.__takeCount__);\n\n      if (!isArr || (!isRight && arrLength == length && takeCount == length)) {\n        return baseWrapperValue(array, this.__actions__);\n      }\n      var result = [];\n\n      outer:\n      while (length-- && resIndex < takeCount) {\n        index += dir;\n\n        var iterIndex = -1,\n            value = array[index];\n\n        while (++iterIndex < iterLength) {\n          var data = iteratees[iterIndex],\n              iteratee = data.iteratee,\n              type = data.type,\n              computed = iteratee(value);\n\n          if (type == LAZY_MAP_FLAG) {\n            value = computed;\n          } else if (!computed) {\n            if (type == LAZY_FILTER_FLAG) {\n              continue outer;\n            } else {\n              break outer;\n            }\n          }\n        }\n        result[resIndex++] = value;\n      }\n      return result;\n    }\n\n    // Ensure `LazyWrapper` is an instance of `baseLodash`.\n    LazyWrapper.prototype = baseCreate(baseLodash.prototype);\n    LazyWrapper.prototype.constructor = LazyWrapper;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates a hash object.\n     *\n     * @private\n     * @constructor\n     * @param {Array} [entries] The key-value pairs to cache.\n     */\n    function Hash(entries) {\n      var index = -1,\n          length = entries == null ? 0 : entries.length;\n\n      this.clear();\n      while (++index < length) {\n        var entry = entries[index];\n        this.set(entry[0], entry[1]);\n      }\n    }\n\n    /**\n     * Removes all key-value entries from the hash.\n     *\n     * @private\n     * @name clear\n     * @memberOf Hash\n     */\n    function hashClear() {\n      this.__data__ = nativeCreate ? nativeCreate(null) : {};\n      this.size = 0;\n    }\n\n    /**\n     * Removes `key` and its value from the hash.\n     *\n     * @private\n     * @name delete\n     * @memberOf Hash\n     * @param {Object} hash The hash to modify.\n     * @param {string} key The key of the value to remove.\n     * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n     */\n    function hashDelete(key) {\n      var result = this.has(key) && delete this.__data__[key];\n      this.size -= result ? 1 : 0;\n      return result;\n    }\n\n    /**\n     * Gets the hash value for `key`.\n     *\n     * @private\n     * @name get\n     * @memberOf Hash\n     * @param {string} key The key of the value to get.\n     * @returns {*} Returns the entry value.\n     */\n    function hashGet(key) {\n      var data = this.__data__;\n      if (nativeCreate) {\n        var result = data[key];\n        return result === HASH_UNDEFINED ? undefined : result;\n      }\n      return hasOwnProperty.call(data, key) ? data[key] : undefined;\n    }\n\n    /**\n     * Checks if a hash value for `key` exists.\n     *\n     * @private\n     * @name has\n     * @memberOf Hash\n     * @param {string} key The key of the entry to check.\n     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n     */\n    function hashHas(key) {\n      var data = this.__data__;\n      return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);\n    }\n\n    /**\n     * Sets the hash `key` to `value`.\n     *\n     * @private\n     * @name set\n     * @memberOf Hash\n     * @param {string} key The key of the value to set.\n     * @param {*} value The value to set.\n     * @returns {Object} Returns the hash instance.\n     */\n    function hashSet(key, value) {\n      var data = this.__data__;\n      this.size += this.has(key) ? 0 : 1;\n      data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;\n      return this;\n    }\n\n    // Add methods to `Hash`.\n    Hash.prototype.clear = hashClear;\n    Hash.prototype['delete'] = hashDelete;\n    Hash.prototype.get = hashGet;\n    Hash.prototype.has = hashHas;\n    Hash.prototype.set = hashSet;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates an list cache object.\n     *\n     * @private\n     * @constructor\n     * @param {Array} [entries] The key-value pairs to cache.\n     */\n    function ListCache(entries) {\n      var index = -1,\n          length = entries == null ? 0 : entries.length;\n\n      this.clear();\n      while (++index < length) {\n        var entry = entries[index];\n        this.set(entry[0], entry[1]);\n      }\n    }\n\n    /**\n     * Removes all key-value entries from the list cache.\n     *\n     * @private\n     * @name clear\n     * @memberOf ListCache\n     */\n    function listCacheClear() {\n      this.__data__ = [];\n      this.size = 0;\n    }\n\n    /**\n     * Removes `key` and its value from the list cache.\n     *\n     * @private\n     * @name delete\n     * @memberOf ListCache\n     * @param {string} key The key of the value to remove.\n     * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n     */\n    function listCacheDelete(key) {\n      var data = this.__data__,\n          index = assocIndexOf(data, key);\n\n      if (index < 0) {\n        return false;\n      }\n      var lastIndex = data.length - 1;\n      if (index == lastIndex) {\n        data.pop();\n      } else {\n        splice.call(data, index, 1);\n      }\n      --this.size;\n      return true;\n    }\n\n    /**\n     * Gets the list cache value for `key`.\n     *\n     * @private\n     * @name get\n     * @memberOf ListCache\n     * @param {string} key The key of the value to get.\n     * @returns {*} Returns the entry value.\n     */\n    function listCacheGet(key) {\n      var data = this.__data__,\n          index = assocIndexOf(data, key);\n\n      return index < 0 ? undefined : data[index][1];\n    }\n\n    /**\n     * Checks if a list cache value for `key` exists.\n     *\n     * @private\n     * @name has\n     * @memberOf ListCache\n     * @param {string} key The key of the entry to check.\n     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n     */\n    function listCacheHas(key) {\n      return assocIndexOf(this.__data__, key) > -1;\n    }\n\n    /**\n     * Sets the list cache `key` to `value`.\n     *\n     * @private\n     * @name set\n     * @memberOf ListCache\n     * @param {string} key The key of the value to set.\n     * @param {*} value The value to set.\n     * @returns {Object} Returns the list cache instance.\n     */\n    function listCacheSet(key, value) {\n      var data = this.__data__,\n          index = assocIndexOf(data, key);\n\n      if (index < 0) {\n        ++this.size;\n        data.push([key, value]);\n      } else {\n        data[index][1] = value;\n      }\n      return this;\n    }\n\n    // Add methods to `ListCache`.\n    ListCache.prototype.clear = listCacheClear;\n    ListCache.prototype['delete'] = listCacheDelete;\n    ListCache.prototype.get = listCacheGet;\n    ListCache.prototype.has = listCacheHas;\n    ListCache.prototype.set = listCacheSet;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates a map cache object to store key-value pairs.\n     *\n     * @private\n     * @constructor\n     * @param {Array} [entries] The key-value pairs to cache.\n     */\n    function MapCache(entries) {\n      var index = -1,\n          length = entries == null ? 0 : entries.length;\n\n      this.clear();\n      while (++index < length) {\n        var entry = entries[index];\n        this.set(entry[0], entry[1]);\n      }\n    }\n\n    /**\n     * Removes all key-value entries from the map.\n     *\n     * @private\n     * @name clear\n     * @memberOf MapCache\n     */\n    function mapCacheClear() {\n      this.size = 0;\n      this.__data__ = {\n        'hash': new Hash,\n        'map': new (Map || ListCache),\n        'string': new Hash\n      };\n    }\n\n    /**\n     * Removes `key` and its value from the map.\n     *\n     * @private\n     * @name delete\n     * @memberOf MapCache\n     * @param {string} key The key of the value to remove.\n     * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n     */\n    function mapCacheDelete(key) {\n      var result = getMapData(this, key)['delete'](key);\n      this.size -= result ? 1 : 0;\n      return result;\n    }\n\n    /**\n     * Gets the map value for `key`.\n     *\n     * @private\n     * @name get\n     * @memberOf MapCache\n     * @param {string} key The key of the value to get.\n     * @returns {*} Returns the entry value.\n     */\n    function mapCacheGet(key) {\n      return getMapData(this, key).get(key);\n    }\n\n    /**\n     * Checks if a map value for `key` exists.\n     *\n     * @private\n     * @name has\n     * @memberOf MapCache\n     * @param {string} key The key of the entry to check.\n     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n     */\n    function mapCacheHas(key) {\n      return getMapData(this, key).has(key);\n    }\n\n    /**\n     * Sets the map `key` to `value`.\n     *\n     * @private\n     * @name set\n     * @memberOf MapCache\n     * @param {string} key The key of the value to set.\n     * @param {*} value The value to set.\n     * @returns {Object} Returns the map cache instance.\n     */\n    function mapCacheSet(key, value) {\n      var data = getMapData(this, key),\n          size = data.size;\n\n      data.set(key, value);\n      this.size += data.size == size ? 0 : 1;\n      return this;\n    }\n\n    // Add methods to `MapCache`.\n    MapCache.prototype.clear = mapCacheClear;\n    MapCache.prototype['delete'] = mapCacheDelete;\n    MapCache.prototype.get = mapCacheGet;\n    MapCache.prototype.has = mapCacheHas;\n    MapCache.prototype.set = mapCacheSet;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     *\n     * Creates an array cache object to store unique values.\n     *\n     * @private\n     * @constructor\n     * @param {Array} [values] The values to cache.\n     */\n    function SetCache(values) {\n      var index = -1,\n          length = values == null ? 0 : values.length;\n\n      this.__data__ = new MapCache;\n      while (++index < length) {\n        this.add(values[index]);\n      }\n    }\n\n    /**\n     * Adds `value` to the array cache.\n     *\n     * @private\n     * @name add\n     * @memberOf SetCache\n     * @alias push\n     * @param {*} value The value to cache.\n     * @returns {Object} Returns the cache instance.\n     */\n    function setCacheAdd(value) {\n      this.__data__.set(value, HASH_UNDEFINED);\n      return this;\n    }\n\n    /**\n     * Checks if `value` is in the array cache.\n     *\n     * @private\n     * @name has\n     * @memberOf SetCache\n     * @param {*} value The value to search for.\n     * @returns {number} Returns `true` if `value` is found, else `false`.\n     */\n    function setCacheHas(value) {\n      return this.__data__.has(value);\n    }\n\n    // Add methods to `SetCache`.\n    SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\n    SetCache.prototype.has = setCacheHas;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates a stack cache object to store key-value pairs.\n     *\n     * @private\n     * @constructor\n     * @param {Array} [entries] The key-value pairs to cache.\n     */\n    function Stack(entries) {\n      var data = this.__data__ = new ListCache(entries);\n      this.size = data.size;\n    }\n\n    /**\n     * Removes all key-value entries from the stack.\n     *\n     * @private\n     * @name clear\n     * @memberOf Stack\n     */\n    function stackClear() {\n      this.__data__ = new ListCache;\n      this.size = 0;\n    }\n\n    /**\n     * Removes `key` and its value from the stack.\n     *\n     * @private\n     * @name delete\n     * @memberOf Stack\n     * @param {string} key The key of the value to remove.\n     * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n     */\n    function stackDelete(key) {\n      var data = this.__data__,\n          result = data['delete'](key);\n\n      this.size = data.size;\n      return result;\n    }\n\n    /**\n     * Gets the stack value for `key`.\n     *\n     * @private\n     * @name get\n     * @memberOf Stack\n     * @param {string} key The key of the value to get.\n     * @returns {*} Returns the entry value.\n     */\n    function stackGet(key) {\n      return this.__data__.get(key);\n    }\n\n    /**\n     * Checks if a stack value for `key` exists.\n     *\n     * @private\n     * @name has\n     * @memberOf Stack\n     * @param {string} key The key of the entry to check.\n     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n     */\n    function stackHas(key) {\n      return this.__data__.has(key);\n    }\n\n    /**\n     * Sets the stack `key` to `value`.\n     *\n     * @private\n     * @name set\n     * @memberOf Stack\n     * @param {string} key The key of the value to set.\n     * @param {*} value The value to set.\n     * @returns {Object} Returns the stack cache instance.\n     */\n    function stackSet(key, value) {\n      var data = this.__data__;\n      if (data instanceof ListCache) {\n        var pairs = data.__data__;\n        if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {\n          pairs.push([key, value]);\n          this.size = ++data.size;\n          return this;\n        }\n        data = this.__data__ = new MapCache(pairs);\n      }\n      data.set(key, value);\n      this.size = data.size;\n      return this;\n    }\n\n    // Add methods to `Stack`.\n    Stack.prototype.clear = stackClear;\n    Stack.prototype['delete'] = stackDelete;\n    Stack.prototype.get = stackGet;\n    Stack.prototype.has = stackHas;\n    Stack.prototype.set = stackSet;\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates an array of the enumerable property names of the array-like `value`.\n     *\n     * @private\n     * @param {*} value The value to query.\n     * @param {boolean} inherited Specify returning inherited property names.\n     * @returns {Array} Returns the array of property names.\n     */\n    function arrayLikeKeys(value, inherited) {\n      var isArr = isArray(value),\n          isArg = !isArr && isArguments(value),\n          isBuff = !isArr && !isArg && isBuffer(value),\n          isType = !isArr && !isArg && !isBuff && isTypedArray(value),\n          skipIndexes = isArr || isArg || isBuff || isType,\n          result = skipIndexes ? baseTimes(value.length, String) : [],\n          length = result.length;\n\n      for (var key in value) {\n        if ((inherited || hasOwnProperty.call(value, key)) &&\n            !(skipIndexes && (\n               // Safari 9 has enumerable `arguments.length` in strict mode.\n               key == 'length' ||\n               // Node.js 0.10 has enumerable non-index properties on buffers.\n               (isBuff && (key == 'offset' || key == 'parent')) ||\n               // PhantomJS 2 has enumerable non-index properties on typed arrays.\n               (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||\n               // Skip index properties.\n               isIndex(key, length)\n            ))) {\n          result.push(key);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * A specialized version of `_.sample` for arrays.\n     *\n     * @private\n     * @param {Array} array The array to sample.\n     * @returns {*} Returns the random element.\n     */\n    function arraySample(array) {\n      var length = array.length;\n      return length ? array[baseRandom(0, length - 1)] : undefined;\n    }\n\n    /**\n     * A specialized version of `_.sampleSize` for arrays.\n     *\n     * @private\n     * @param {Array} array The array to sample.\n     * @param {number} n The number of elements to sample.\n     * @returns {Array} Returns the random elements.\n     */\n    function arraySampleSize(array, n) {\n      return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));\n    }\n\n    /**\n     * A specialized version of `_.shuffle` for arrays.\n     *\n     * @private\n     * @param {Array} array The array to shuffle.\n     * @returns {Array} Returns the new shuffled array.\n     */\n    function arrayShuffle(array) {\n      return shuffleSelf(copyArray(array));\n    }\n\n    /**\n     * This function is like `assignValue` except that it doesn't assign\n     * `undefined` values.\n     *\n     * @private\n     * @param {Object} object The object to modify.\n     * @param {string} key The key of the property to assign.\n     * @param {*} value The value to assign.\n     */\n    function assignMergeValue(object, key, value) {\n      if ((value !== undefined && !eq(object[key], value)) ||\n          (value === undefined && !(key in object))) {\n        baseAssignValue(object, key, value);\n      }\n    }\n\n    /**\n     * Assigns `value` to `key` of `object` if the existing value is not equivalent\n     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons.\n     *\n     * @private\n     * @param {Object} object The object to modify.\n     * @param {string} key The key of the property to assign.\n     * @param {*} value The value to assign.\n     */\n    function assignValue(object, key, value) {\n      var objValue = object[key];\n      if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||\n          (value === undefined && !(key in object))) {\n        baseAssignValue(object, key, value);\n      }\n    }\n\n    /**\n     * Gets the index at which the `key` is found in `array` of key-value pairs.\n     *\n     * @private\n     * @param {Array} array The array to inspect.\n     * @param {*} key The key to search for.\n     * @returns {number} Returns the index of the matched value, else `-1`.\n     */\n    function assocIndexOf(array, key) {\n      var length = array.length;\n      while (length--) {\n        if (eq(array[length][0], key)) {\n          return length;\n        }\n      }\n      return -1;\n    }\n\n    /**\n     * Aggregates elements of `collection` on `accumulator` with keys transformed\n     * by `iteratee` and values set by `setter`.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} setter The function to set `accumulator` values.\n     * @param {Function} iteratee The iteratee to transform keys.\n     * @param {Object} accumulator The initial aggregated object.\n     * @returns {Function} Returns `accumulator`.\n     */\n    function baseAggregator(collection, setter, iteratee, accumulator) {\n      baseEach(collection, function(value, key, collection) {\n        setter(accumulator, value, iteratee(value), collection);\n      });\n      return accumulator;\n    }\n\n    /**\n     * The base implementation of `_.assign` without support for multiple sources\n     * or `customizer` functions.\n     *\n     * @private\n     * @param {Object} object The destination object.\n     * @param {Object} source The source object.\n     * @returns {Object} Returns `object`.\n     */\n    function baseAssign(object, source) {\n      return object && copyObject(source, keys(source), object);\n    }\n\n    /**\n     * The base implementation of `_.assignIn` without support for multiple sources\n     * or `customizer` functions.\n     *\n     * @private\n     * @param {Object} object The destination object.\n     * @param {Object} source The source object.\n     * @returns {Object} Returns `object`.\n     */\n    function baseAssignIn(object, source) {\n      return object && copyObject(source, keysIn(source), object);\n    }\n\n    /**\n     * The base implementation of `assignValue` and `assignMergeValue` without\n     * value checks.\n     *\n     * @private\n     * @param {Object} object The object to modify.\n     * @param {string} key The key of the property to assign.\n     * @param {*} value The value to assign.\n     */\n    function baseAssignValue(object, key, value) {\n      if (key == '__proto__' && defineProperty) {\n        defineProperty(object, key, {\n          'configurable': true,\n          'enumerable': true,\n          'value': value,\n          'writable': true\n        });\n      } else {\n        object[key] = value;\n      }\n    }\n\n    /**\n     * The base implementation of `_.at` without support for individual paths.\n     *\n     * @private\n     * @param {Object} object The object to iterate over.\n     * @param {string[]} paths The property paths to pick.\n     * @returns {Array} Returns the picked elements.\n     */\n    function baseAt(object, paths) {\n      var index = -1,\n          length = paths.length,\n          result = Array(length),\n          skip = object == null;\n\n      while (++index < length) {\n        result[index] = skip ? undefined : get(object, paths[index]);\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.clamp` which doesn't coerce arguments.\n     *\n     * @private\n     * @param {number} number The number to clamp.\n     * @param {number} [lower] The lower bound.\n     * @param {number} upper The upper bound.\n     * @returns {number} Returns the clamped number.\n     */\n    function baseClamp(number, lower, upper) {\n      if (number === number) {\n        if (upper !== undefined) {\n          number = number <= upper ? number : upper;\n        }\n        if (lower !== undefined) {\n          number = number >= lower ? number : lower;\n        }\n      }\n      return number;\n    }\n\n    /**\n     * The base implementation of `_.clone` and `_.cloneDeep` which tracks\n     * traversed objects.\n     *\n     * @private\n     * @param {*} value The value to clone.\n     * @param {boolean} bitmask The bitmask flags.\n     *  1 - Deep clone\n     *  2 - Flatten inherited properties\n     *  4 - Clone symbols\n     * @param {Function} [customizer] The function to customize cloning.\n     * @param {string} [key] The key of `value`.\n     * @param {Object} [object] The parent object of `value`.\n     * @param {Object} [stack] Tracks traversed objects and their clone counterparts.\n     * @returns {*} Returns the cloned value.\n     */\n    function baseClone(value, bitmask, customizer, key, object, stack) {\n      var result,\n          isDeep = bitmask & CLONE_DEEP_FLAG,\n          isFlat = bitmask & CLONE_FLAT_FLAG,\n          isFull = bitmask & CLONE_SYMBOLS_FLAG;\n\n      if (customizer) {\n        result = object ? customizer(value, key, object, stack) : customizer(value);\n      }\n      if (result !== undefined) {\n        return result;\n      }\n      if (!isObject(value)) {\n        return value;\n      }\n      var isArr = isArray(value);\n      if (isArr) {\n        result = initCloneArray(value);\n        if (!isDeep) {\n          return copyArray(value, result);\n        }\n      } else {\n        var tag = getTag(value),\n            isFunc = tag == funcTag || tag == genTag;\n\n        if (isBuffer(value)) {\n          return cloneBuffer(value, isDeep);\n        }\n        if (tag == objectTag || tag == argsTag || (isFunc && !object)) {\n          result = (isFlat || isFunc) ? {} : initCloneObject(value);\n          if (!isDeep) {\n            return isFlat\n              ? copySymbolsIn(value, baseAssignIn(result, value))\n              : copySymbols(value, baseAssign(result, value));\n          }\n        } else {\n          if (!cloneableTags[tag]) {\n            return object ? value : {};\n          }\n          result = initCloneByTag(value, tag, baseClone, isDeep);\n        }\n      }\n      // Check for circular references and return its corresponding clone.\n      stack || (stack = new Stack);\n      var stacked = stack.get(value);\n      if (stacked) {\n        return stacked;\n      }\n      stack.set(value, result);\n\n      var keysFunc = isFull\n        ? (isFlat ? getAllKeysIn : getAllKeys)\n        : (isFlat ? keysIn : keys);\n\n      var props = isArr ? undefined : keysFunc(value);\n      arrayEach(props || value, function(subValue, key) {\n        if (props) {\n          key = subValue;\n          subValue = value[key];\n        }\n        // Recursively populate clone (susceptible to call stack limits).\n        assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));\n      });\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.conforms` which doesn't clone `source`.\n     *\n     * @private\n     * @param {Object} source The object of property predicates to conform to.\n     * @returns {Function} Returns the new spec function.\n     */\n    function baseConforms(source) {\n      var props = keys(source);\n      return function(object) {\n        return baseConformsTo(object, source, props);\n      };\n    }\n\n    /**\n     * The base implementation of `_.conformsTo` which accepts `props` to check.\n     *\n     * @private\n     * @param {Object} object The object to inspect.\n     * @param {Object} source The object of property predicates to conform to.\n     * @returns {boolean} Returns `true` if `object` conforms, else `false`.\n     */\n    function baseConformsTo(object, source, props) {\n      var length = props.length;\n      if (object == null) {\n        return !length;\n      }\n      object = Object(object);\n      while (length--) {\n        var key = props[length],\n            predicate = source[key],\n            value = object[key];\n\n        if ((value === undefined && !(key in object)) || !predicate(value)) {\n          return false;\n        }\n      }\n      return true;\n    }\n\n    /**\n     * The base implementation of `_.delay` and `_.defer` which accepts `args`\n     * to provide to `func`.\n     *\n     * @private\n     * @param {Function} func The function to delay.\n     * @param {number} wait The number of milliseconds to delay invocation.\n     * @param {Array} args The arguments to provide to `func`.\n     * @returns {number|Object} Returns the timer id or timeout object.\n     */\n    function baseDelay(func, wait, args) {\n      if (typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      return setTimeout(function() { func.apply(undefined, args); }, wait);\n    }\n\n    /**\n     * The base implementation of methods like `_.difference` without support\n     * for excluding multiple arrays or iteratee shorthands.\n     *\n     * @private\n     * @param {Array} array The array to inspect.\n     * @param {Array} values The values to exclude.\n     * @param {Function} [iteratee] The iteratee invoked per element.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new array of filtered values.\n     */\n    function baseDifference(array, values, iteratee, comparator) {\n      var index = -1,\n          includes = arrayIncludes,\n          isCommon = true,\n          length = array.length,\n          result = [],\n          valuesLength = values.length;\n\n      if (!length) {\n        return result;\n      }\n      if (iteratee) {\n        values = arrayMap(values, baseUnary(iteratee));\n      }\n      if (comparator) {\n        includes = arrayIncludesWith;\n        isCommon = false;\n      }\n      else if (values.length >= LARGE_ARRAY_SIZE) {\n        includes = cacheHas;\n        isCommon = false;\n        values = new SetCache(values);\n      }\n      outer:\n      while (++index < length) {\n        var value = array[index],\n            computed = iteratee == null ? value : iteratee(value);\n\n        value = (comparator || value !== 0) ? value : 0;\n        if (isCommon && computed === computed) {\n          var valuesIndex = valuesLength;\n          while (valuesIndex--) {\n            if (values[valuesIndex] === computed) {\n              continue outer;\n            }\n          }\n          result.push(value);\n        }\n        else if (!includes(values, computed, comparator)) {\n          result.push(value);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.forEach` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} iteratee The function invoked per iteration.\n     * @returns {Array|Object} Returns `collection`.\n     */\n    var baseEach = createBaseEach(baseForOwn);\n\n    /**\n     * The base implementation of `_.forEachRight` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} iteratee The function invoked per iteration.\n     * @returns {Array|Object} Returns `collection`.\n     */\n    var baseEachRight = createBaseEach(baseForOwnRight, true);\n\n    /**\n     * The base implementation of `_.every` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} predicate The function invoked per iteration.\n     * @returns {boolean} Returns `true` if all elements pass the predicate check,\n     *  else `false`\n     */\n    function baseEvery(collection, predicate) {\n      var result = true;\n      baseEach(collection, function(value, index, collection) {\n        result = !!predicate(value, index, collection);\n        return result;\n      });\n      return result;\n    }\n\n    /**\n     * The base implementation of methods like `_.max` and `_.min` which accepts a\n     * `comparator` to determine the extremum value.\n     *\n     * @private\n     * @param {Array} array The array to iterate over.\n     * @param {Function} iteratee The iteratee invoked per iteration.\n     * @param {Function} comparator The comparator used to compare values.\n     * @returns {*} Returns the extremum value.\n     */\n    function baseExtremum(array, iteratee, comparator) {\n      var index = -1,\n          length = array.length;\n\n      while (++index < length) {\n        var value = array[index],\n            current = iteratee(value);\n\n        if (current != null && (computed === undefined\n              ? (current === current && !isSymbol(current))\n              : comparator(current, computed)\n            )) {\n          var computed = current,\n              result = value;\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.fill` without an iteratee call guard.\n     *\n     * @private\n     * @param {Array} array The array to fill.\n     * @param {*} value The value to fill `array` with.\n     * @param {number} [start=0] The start position.\n     * @param {number} [end=array.length] The end position.\n     * @returns {Array} Returns `array`.\n     */\n    function baseFill(array, value, start, end) {\n      var length = array.length;\n\n      start = toInteger(start);\n      if (start < 0) {\n        start = -start > length ? 0 : (length + start);\n      }\n      end = (end === undefined || end > length) ? length : toInteger(end);\n      if (end < 0) {\n        end += length;\n      }\n      end = start > end ? 0 : toLength(end);\n      while (start < end) {\n        array[start++] = value;\n      }\n      return array;\n    }\n\n    /**\n     * The base implementation of `_.filter` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} predicate The function invoked per iteration.\n     * @returns {Array} Returns the new filtered array.\n     */\n    function baseFilter(collection, predicate) {\n      var result = [];\n      baseEach(collection, function(value, index, collection) {\n        if (predicate(value, index, collection)) {\n          result.push(value);\n        }\n      });\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.flatten` with support for restricting flattening.\n     *\n     * @private\n     * @param {Array} array The array to flatten.\n     * @param {number} depth The maximum recursion depth.\n     * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.\n     * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.\n     * @param {Array} [result=[]] The initial result value.\n     * @returns {Array} Returns the new flattened array.\n     */\n    function baseFlatten(array, depth, predicate, isStrict, result) {\n      var index = -1,\n          length = array.length;\n\n      predicate || (predicate = isFlattenable);\n      result || (result = []);\n\n      while (++index < length) {\n        var value = array[index];\n        if (depth > 0 && predicate(value)) {\n          if (depth > 1) {\n            // Recursively flatten arrays (susceptible to call stack limits).\n            baseFlatten(value, depth - 1, predicate, isStrict, result);\n          } else {\n            arrayPush(result, value);\n          }\n        } else if (!isStrict) {\n          result[result.length] = value;\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `baseForOwn` which iterates over `object`\n     * properties returned by `keysFunc` and invokes `iteratee` for each property.\n     * Iteratee functions may exit iteration early by explicitly returning `false`.\n     *\n     * @private\n     * @param {Object} object The object to iterate over.\n     * @param {Function} iteratee The function invoked per iteration.\n     * @param {Function} keysFunc The function to get the keys of `object`.\n     * @returns {Object} Returns `object`.\n     */\n    var baseFor = createBaseFor();\n\n    /**\n     * This function is like `baseFor` except that it iterates over properties\n     * in the opposite order.\n     *\n     * @private\n     * @param {Object} object The object to iterate over.\n     * @param {Function} iteratee The function invoked per iteration.\n     * @param {Function} keysFunc The function to get the keys of `object`.\n     * @returns {Object} Returns `object`.\n     */\n    var baseForRight = createBaseFor(true);\n\n    /**\n     * The base implementation of `_.forOwn` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Object} object The object to iterate over.\n     * @param {Function} iteratee The function invoked per iteration.\n     * @returns {Object} Returns `object`.\n     */\n    function baseForOwn(object, iteratee) {\n      return object && baseFor(object, iteratee, keys);\n    }\n\n    /**\n     * The base implementation of `_.forOwnRight` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Object} object The object to iterate over.\n     * @param {Function} iteratee The function invoked per iteration.\n     * @returns {Object} Returns `object`.\n     */\n    function baseForOwnRight(object, iteratee) {\n      return object && baseForRight(object, iteratee, keys);\n    }\n\n    /**\n     * The base implementation of `_.functions` which creates an array of\n     * `object` function property names filtered from `props`.\n     *\n     * @private\n     * @param {Object} object The object to inspect.\n     * @param {Array} props The property names to filter.\n     * @returns {Array} Returns the function names.\n     */\n    function baseFunctions(object, props) {\n      return arrayFilter(props, function(key) {\n        return isFunction(object[key]);\n      });\n    }\n\n    /**\n     * The base implementation of `_.get` without support for default values.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path of the property to get.\n     * @returns {*} Returns the resolved value.\n     */\n    function baseGet(object, path) {\n      path = castPath(path, object);\n\n      var index = 0,\n          length = path.length;\n\n      while (object != null && index < length) {\n        object = object[toKey(path[index++])];\n      }\n      return (index && index == length) ? object : undefined;\n    }\n\n    /**\n     * The base implementation of `getAllKeys` and `getAllKeysIn` which uses\n     * `keysFunc` and `symbolsFunc` to get the enumerable property names and\n     * symbols of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @param {Function} keysFunc The function to get the keys of `object`.\n     * @param {Function} symbolsFunc The function to get the symbols of `object`.\n     * @returns {Array} Returns the array of property names and symbols.\n     */\n    function baseGetAllKeys(object, keysFunc, symbolsFunc) {\n      var result = keysFunc(object);\n      return isArray(object) ? result : arrayPush(result, symbolsFunc(object));\n    }\n\n    /**\n     * The base implementation of `getTag` without fallbacks for buggy environments.\n     *\n     * @private\n     * @param {*} value The value to query.\n     * @returns {string} Returns the `toStringTag`.\n     */\n    function baseGetTag(value) {\n      if (value == null) {\n        return value === undefined ? undefinedTag : nullTag;\n      }\n      return (symToStringTag && symToStringTag in Object(value))\n        ? getRawTag(value)\n        : objectToString(value);\n    }\n\n    /**\n     * The base implementation of `_.gt` which doesn't coerce arguments.\n     *\n     * @private\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if `value` is greater than `other`,\n     *  else `false`.\n     */\n    function baseGt(value, other) {\n      return value > other;\n    }\n\n    /**\n     * The base implementation of `_.has` without support for deep paths.\n     *\n     * @private\n     * @param {Object} [object] The object to query.\n     * @param {Array|string} key The key to check.\n     * @returns {boolean} Returns `true` if `key` exists, else `false`.\n     */\n    function baseHas(object, key) {\n      return object != null && hasOwnProperty.call(object, key);\n    }\n\n    /**\n     * The base implementation of `_.hasIn` without support for deep paths.\n     *\n     * @private\n     * @param {Object} [object] The object to query.\n     * @param {Array|string} key The key to check.\n     * @returns {boolean} Returns `true` if `key` exists, else `false`.\n     */\n    function baseHasIn(object, key) {\n      return object != null && key in Object(object);\n    }\n\n    /**\n     * The base implementation of `_.inRange` which doesn't coerce arguments.\n     *\n     * @private\n     * @param {number} number The number to check.\n     * @param {number} start The start of the range.\n     * @param {number} end The end of the range.\n     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.\n     */\n    function baseInRange(number, start, end) {\n      return number >= nativeMin(start, end) && number < nativeMax(start, end);\n    }\n\n    /**\n     * The base implementation of methods like `_.intersection`, without support\n     * for iteratee shorthands, that accepts an array of arrays to inspect.\n     *\n     * @private\n     * @param {Array} arrays The arrays to inspect.\n     * @param {Function} [iteratee] The iteratee invoked per element.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new array of shared values.\n     */\n    function baseIntersection(arrays, iteratee, comparator) {\n      var includes = comparator ? arrayIncludesWith : arrayIncludes,\n          length = arrays[0].length,\n          othLength = arrays.length,\n          othIndex = othLength,\n          caches = Array(othLength),\n          maxLength = Infinity,\n          result = [];\n\n      while (othIndex--) {\n        var array = arrays[othIndex];\n        if (othIndex && iteratee) {\n          array = arrayMap(array, baseUnary(iteratee));\n        }\n        maxLength = nativeMin(array.length, maxLength);\n        caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))\n          ? new SetCache(othIndex && array)\n          : undefined;\n      }\n      array = arrays[0];\n\n      var index = -1,\n          seen = caches[0];\n\n      outer:\n      while (++index < length && result.length < maxLength) {\n        var value = array[index],\n            computed = iteratee ? iteratee(value) : value;\n\n        value = (comparator || value !== 0) ? value : 0;\n        if (!(seen\n              ? cacheHas(seen, computed)\n              : includes(result, computed, comparator)\n            )) {\n          othIndex = othLength;\n          while (--othIndex) {\n            var cache = caches[othIndex];\n            if (!(cache\n                  ? cacheHas(cache, computed)\n                  : includes(arrays[othIndex], computed, comparator))\n                ) {\n              continue outer;\n            }\n          }\n          if (seen) {\n            seen.push(computed);\n          }\n          result.push(value);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.invert` and `_.invertBy` which inverts\n     * `object` with values transformed by `iteratee` and set by `setter`.\n     *\n     * @private\n     * @param {Object} object The object to iterate over.\n     * @param {Function} setter The function to set `accumulator` values.\n     * @param {Function} iteratee The iteratee to transform values.\n     * @param {Object} accumulator The initial inverted object.\n     * @returns {Function} Returns `accumulator`.\n     */\n    function baseInverter(object, setter, iteratee, accumulator) {\n      baseForOwn(object, function(value, key, object) {\n        setter(accumulator, iteratee(value), key, object);\n      });\n      return accumulator;\n    }\n\n    /**\n     * The base implementation of `_.invoke` without support for individual\n     * method arguments.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path of the method to invoke.\n     * @param {Array} args The arguments to invoke the method with.\n     * @returns {*} Returns the result of the invoked method.\n     */\n    function baseInvoke(object, path, args) {\n      path = castPath(path, object);\n      object = parent(object, path);\n      var func = object == null ? object : object[toKey(last(path))];\n      return func == null ? undefined : apply(func, object, args);\n    }\n\n    /**\n     * The base implementation of `_.isArguments`.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n     */\n    function baseIsArguments(value) {\n      return isObjectLike(value) && baseGetTag(value) == argsTag;\n    }\n\n    /**\n     * The base implementation of `_.isArrayBuffer` without Node.js optimizations.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.\n     */\n    function baseIsArrayBuffer(value) {\n      return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;\n    }\n\n    /**\n     * The base implementation of `_.isDate` without Node.js optimizations.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.\n     */\n    function baseIsDate(value) {\n      return isObjectLike(value) && baseGetTag(value) == dateTag;\n    }\n\n    /**\n     * The base implementation of `_.isEqual` which supports partial comparisons\n     * and tracks traversed objects.\n     *\n     * @private\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @param {boolean} bitmask The bitmask flags.\n     *  1 - Unordered comparison\n     *  2 - Partial comparison\n     * @param {Function} [customizer] The function to customize comparisons.\n     * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n     */\n    function baseIsEqual(value, other, bitmask, customizer, stack) {\n      if (value === other) {\n        return true;\n      }\n      if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n        return value !== value && other !== other;\n      }\n      return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n    }\n\n    /**\n     * A specialized version of `baseIsEqual` for arrays and objects which performs\n     * deep comparisons and tracks traversed objects enabling objects with circular\n     * references to be compared.\n     *\n     * @private\n     * @param {Object} object The object to compare.\n     * @param {Object} other The other object to compare.\n     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n     * @param {Function} customizer The function to customize comparisons.\n     * @param {Function} equalFunc The function to determine equivalents of values.\n     * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n     */\n    function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n      var objIsArr = isArray(object),\n          othIsArr = isArray(other),\n          objTag = objIsArr ? arrayTag : getTag(object),\n          othTag = othIsArr ? arrayTag : getTag(other);\n\n      objTag = objTag == argsTag ? objectTag : objTag;\n      othTag = othTag == argsTag ? objectTag : othTag;\n\n      var objIsObj = objTag == objectTag,\n          othIsObj = othTag == objectTag,\n          isSameTag = objTag == othTag;\n\n      if (isSameTag && isBuffer(object)) {\n        if (!isBuffer(other)) {\n          return false;\n        }\n        objIsArr = true;\n        objIsObj = false;\n      }\n      if (isSameTag && !objIsObj) {\n        stack || (stack = new Stack);\n        return (objIsArr || isTypedArray(object))\n          ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n          : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n      }\n      if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n        var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n            othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n        if (objIsWrapped || othIsWrapped) {\n          var objUnwrapped = objIsWrapped ? object.value() : object,\n              othUnwrapped = othIsWrapped ? other.value() : other;\n\n          stack || (stack = new Stack);\n          return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n        }\n      }\n      if (!isSameTag) {\n        return false;\n      }\n      stack || (stack = new Stack);\n      return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n    }\n\n    /**\n     * The base implementation of `_.isMap` without Node.js optimizations.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n     */\n    function baseIsMap(value) {\n      return isObjectLike(value) && getTag(value) == mapTag;\n    }\n\n    /**\n     * The base implementation of `_.isMatch` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Object} object The object to inspect.\n     * @param {Object} source The object of property values to match.\n     * @param {Array} matchData The property names, values, and compare flags to match.\n     * @param {Function} [customizer] The function to customize comparisons.\n     * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n     */\n    function baseIsMatch(object, source, matchData, customizer) {\n      var index = matchData.length,\n          length = index,\n          noCustomizer = !customizer;\n\n      if (object == null) {\n        return !length;\n      }\n      object = Object(object);\n      while (index--) {\n        var data = matchData[index];\n        if ((noCustomizer && data[2])\n              ? data[1] !== object[data[0]]\n              : !(data[0] in object)\n            ) {\n          return false;\n        }\n      }\n      while (++index < length) {\n        data = matchData[index];\n        var key = data[0],\n            objValue = object[key],\n            srcValue = data[1];\n\n        if (noCustomizer && data[2]) {\n          if (objValue === undefined && !(key in object)) {\n            return false;\n          }\n        } else {\n          var stack = new Stack;\n          if (customizer) {\n            var result = customizer(objValue, srcValue, key, object, source, stack);\n          }\n          if (!(result === undefined\n                ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)\n                : result\n              )) {\n            return false;\n          }\n        }\n      }\n      return true;\n    }\n\n    /**\n     * The base implementation of `_.isNative` without bad shim checks.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a native function,\n     *  else `false`.\n     */\n    function baseIsNative(value) {\n      if (!isObject(value) || isMasked(value)) {\n        return false;\n      }\n      var pattern = isFunction(value) ? reIsNative : reIsHostCtor;\n      return pattern.test(toSource(value));\n    }\n\n    /**\n     * The base implementation of `_.isRegExp` without Node.js optimizations.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.\n     */\n    function baseIsRegExp(value) {\n      return isObjectLike(value) && baseGetTag(value) == regexpTag;\n    }\n\n    /**\n     * The base implementation of `_.isSet` without Node.js optimizations.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n     */\n    function baseIsSet(value) {\n      return isObjectLike(value) && getTag(value) == setTag;\n    }\n\n    /**\n     * The base implementation of `_.isTypedArray` without Node.js optimizations.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n     */\n    function baseIsTypedArray(value) {\n      return isObjectLike(value) &&\n        isLength(value.length) && !!typedArrayTags[baseGetTag(value)];\n    }\n\n    /**\n     * The base implementation of `_.iteratee`.\n     *\n     * @private\n     * @param {*} [value=_.identity] The value to convert to an iteratee.\n     * @returns {Function} Returns the iteratee.\n     */\n    function baseIteratee(value) {\n      // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.\n      // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.\n      if (typeof value == 'function') {\n        return value;\n      }\n      if (value == null) {\n        return identity;\n      }\n      if (typeof value == 'object') {\n        return isArray(value)\n          ? baseMatchesProperty(value[0], value[1])\n          : baseMatches(value);\n      }\n      return property(value);\n    }\n\n    /**\n     * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property names.\n     */\n    function baseKeys(object) {\n      if (!isPrototype(object)) {\n        return nativeKeys(object);\n      }\n      var result = [];\n      for (var key in Object(object)) {\n        if (hasOwnProperty.call(object, key) && key != 'constructor') {\n          result.push(key);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property names.\n     */\n    function baseKeysIn(object) {\n      if (!isObject(object)) {\n        return nativeKeysIn(object);\n      }\n      var isProto = isPrototype(object),\n          result = [];\n\n      for (var key in object) {\n        if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {\n          result.push(key);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.lt` which doesn't coerce arguments.\n     *\n     * @private\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if `value` is less than `other`,\n     *  else `false`.\n     */\n    function baseLt(value, other) {\n      return value < other;\n    }\n\n    /**\n     * The base implementation of `_.map` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} iteratee The function invoked per iteration.\n     * @returns {Array} Returns the new mapped array.\n     */\n    function baseMap(collection, iteratee) {\n      var index = -1,\n          result = isArrayLike(collection) ? Array(collection.length) : [];\n\n      baseEach(collection, function(value, key, collection) {\n        result[++index] = iteratee(value, key, collection);\n      });\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.matches` which doesn't clone `source`.\n     *\n     * @private\n     * @param {Object} source The object of property values to match.\n     * @returns {Function} Returns the new spec function.\n     */\n    function baseMatches(source) {\n      var matchData = getMatchData(source);\n      if (matchData.length == 1 && matchData[0][2]) {\n        return matchesStrictComparable(matchData[0][0], matchData[0][1]);\n      }\n      return function(object) {\n        return object === source || baseIsMatch(object, source, matchData);\n      };\n    }\n\n    /**\n     * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.\n     *\n     * @private\n     * @param {string} path The path of the property to get.\n     * @param {*} srcValue The value to match.\n     * @returns {Function} Returns the new spec function.\n     */\n    function baseMatchesProperty(path, srcValue) {\n      if (isKey(path) && isStrictComparable(srcValue)) {\n        return matchesStrictComparable(toKey(path), srcValue);\n      }\n      return function(object) {\n        var objValue = get(object, path);\n        return (objValue === undefined && objValue === srcValue)\n          ? hasIn(object, path)\n          : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);\n      };\n    }\n\n    /**\n     * The base implementation of `_.merge` without support for multiple sources.\n     *\n     * @private\n     * @param {Object} object The destination object.\n     * @param {Object} source The source object.\n     * @param {number} srcIndex The index of `source`.\n     * @param {Function} [customizer] The function to customize merged values.\n     * @param {Object} [stack] Tracks traversed source values and their merged\n     *  counterparts.\n     */\n    function baseMerge(object, source, srcIndex, customizer, stack) {\n      if (object === source) {\n        return;\n      }\n      baseFor(source, function(srcValue, key) {\n        if (isObject(srcValue)) {\n          stack || (stack = new Stack);\n          baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);\n        }\n        else {\n          var newValue = customizer\n            ? customizer(object[key], srcValue, (key + ''), object, source, stack)\n            : undefined;\n\n          if (newValue === undefined) {\n            newValue = srcValue;\n          }\n          assignMergeValue(object, key, newValue);\n        }\n      }, keysIn);\n    }\n\n    /**\n     * A specialized version of `baseMerge` for arrays and objects which performs\n     * deep merges and tracks traversed objects enabling objects with circular\n     * references to be merged.\n     *\n     * @private\n     * @param {Object} object The destination object.\n     * @param {Object} source The source object.\n     * @param {string} key The key of the value to merge.\n     * @param {number} srcIndex The index of `source`.\n     * @param {Function} mergeFunc The function to merge values.\n     * @param {Function} [customizer] The function to customize assigned values.\n     * @param {Object} [stack] Tracks traversed source values and their merged\n     *  counterparts.\n     */\n    function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {\n      var objValue = object[key],\n          srcValue = source[key],\n          stacked = stack.get(srcValue);\n\n      if (stacked) {\n        assignMergeValue(object, key, stacked);\n        return;\n      }\n      var newValue = customizer\n        ? customizer(objValue, srcValue, (key + ''), object, source, stack)\n        : undefined;\n\n      var isCommon = newValue === undefined;\n\n      if (isCommon) {\n        var isArr = isArray(srcValue),\n            isBuff = !isArr && isBuffer(srcValue),\n            isTyped = !isArr && !isBuff && isTypedArray(srcValue);\n\n        newValue = srcValue;\n        if (isArr || isBuff || isTyped) {\n          if (isArray(objValue)) {\n            newValue = objValue;\n          }\n          else if (isArrayLikeObject(objValue)) {\n            newValue = copyArray(objValue);\n          }\n          else if (isBuff) {\n            isCommon = false;\n            newValue = cloneBuffer(srcValue, true);\n          }\n          else if (isTyped) {\n            isCommon = false;\n            newValue = cloneTypedArray(srcValue, true);\n          }\n          else {\n            newValue = [];\n          }\n        }\n        else if (isPlainObject(srcValue) || isArguments(srcValue)) {\n          newValue = objValue;\n          if (isArguments(objValue)) {\n            newValue = toPlainObject(objValue);\n          }\n          else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {\n            newValue = initCloneObject(srcValue);\n          }\n        }\n        else {\n          isCommon = false;\n        }\n      }\n      if (isCommon) {\n        // Recursively merge objects and arrays (susceptible to call stack limits).\n        stack.set(srcValue, newValue);\n        mergeFunc(newValue, srcValue, srcIndex, customizer, stack);\n        stack['delete'](srcValue);\n      }\n      assignMergeValue(object, key, newValue);\n    }\n\n    /**\n     * The base implementation of `_.nth` which doesn't coerce arguments.\n     *\n     * @private\n     * @param {Array} array The array to query.\n     * @param {number} n The index of the element to return.\n     * @returns {*} Returns the nth element of `array`.\n     */\n    function baseNth(array, n) {\n      var length = array.length;\n      if (!length) {\n        return;\n      }\n      n += n < 0 ? length : 0;\n      return isIndex(n, length) ? array[n] : undefined;\n    }\n\n    /**\n     * The base implementation of `_.orderBy` without param guards.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.\n     * @param {string[]} orders The sort orders of `iteratees`.\n     * @returns {Array} Returns the new sorted array.\n     */\n    function baseOrderBy(collection, iteratees, orders) {\n      var index = -1;\n      iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));\n\n      var result = baseMap(collection, function(value, key, collection) {\n        var criteria = arrayMap(iteratees, function(iteratee) {\n          return iteratee(value);\n        });\n        return { 'criteria': criteria, 'index': ++index, 'value': value };\n      });\n\n      return baseSortBy(result, function(object, other) {\n        return compareMultiple(object, other, orders);\n      });\n    }\n\n    /**\n     * The base implementation of `_.pick` without support for individual\n     * property identifiers.\n     *\n     * @private\n     * @param {Object} object The source object.\n     * @param {string[]} paths The property paths to pick.\n     * @returns {Object} Returns the new object.\n     */\n    function basePick(object, paths) {\n      return basePickBy(object, paths, function(value, path) {\n        return hasIn(object, path);\n      });\n    }\n\n    /**\n     * The base implementation of  `_.pickBy` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Object} object The source object.\n     * @param {string[]} paths The property paths to pick.\n     * @param {Function} predicate The function invoked per property.\n     * @returns {Object} Returns the new object.\n     */\n    function basePickBy(object, paths, predicate) {\n      var index = -1,\n          length = paths.length,\n          result = {};\n\n      while (++index < length) {\n        var path = paths[index],\n            value = baseGet(object, path);\n\n        if (predicate(value, path)) {\n          baseSet(result, castPath(path, object), value);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * A specialized version of `baseProperty` which supports deep paths.\n     *\n     * @private\n     * @param {Array|string} path The path of the property to get.\n     * @returns {Function} Returns the new accessor function.\n     */\n    function basePropertyDeep(path) {\n      return function(object) {\n        return baseGet(object, path);\n      };\n    }\n\n    /**\n     * The base implementation of `_.pullAllBy` without support for iteratee\n     * shorthands.\n     *\n     * @private\n     * @param {Array} array The array to modify.\n     * @param {Array} values The values to remove.\n     * @param {Function} [iteratee] The iteratee invoked per element.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns `array`.\n     */\n    function basePullAll(array, values, iteratee, comparator) {\n      var indexOf = comparator ? baseIndexOfWith : baseIndexOf,\n          index = -1,\n          length = values.length,\n          seen = array;\n\n      if (array === values) {\n        values = copyArray(values);\n      }\n      if (iteratee) {\n        seen = arrayMap(array, baseUnary(iteratee));\n      }\n      while (++index < length) {\n        var fromIndex = 0,\n            value = values[index],\n            computed = iteratee ? iteratee(value) : value;\n\n        while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {\n          if (seen !== array) {\n            splice.call(seen, fromIndex, 1);\n          }\n          splice.call(array, fromIndex, 1);\n        }\n      }\n      return array;\n    }\n\n    /**\n     * The base implementation of `_.pullAt` without support for individual\n     * indexes or capturing the removed elements.\n     *\n     * @private\n     * @param {Array} array The array to modify.\n     * @param {number[]} indexes The indexes of elements to remove.\n     * @returns {Array} Returns `array`.\n     */\n    function basePullAt(array, indexes) {\n      var length = array ? indexes.length : 0,\n          lastIndex = length - 1;\n\n      while (length--) {\n        var index = indexes[length];\n        if (length == lastIndex || index !== previous) {\n          var previous = index;\n          if (isIndex(index)) {\n            splice.call(array, index, 1);\n          } else {\n            baseUnset(array, index);\n          }\n        }\n      }\n      return array;\n    }\n\n    /**\n     * The base implementation of `_.random` without support for returning\n     * floating-point numbers.\n     *\n     * @private\n     * @param {number} lower The lower bound.\n     * @param {number} upper The upper bound.\n     * @returns {number} Returns the random number.\n     */\n    function baseRandom(lower, upper) {\n      return lower + nativeFloor(nativeRandom() * (upper - lower + 1));\n    }\n\n    /**\n     * The base implementation of `_.range` and `_.rangeRight` which doesn't\n     * coerce arguments.\n     *\n     * @private\n     * @param {number} start The start of the range.\n     * @param {number} end The end of the range.\n     * @param {number} step The value to increment or decrement by.\n     * @param {boolean} [fromRight] Specify iterating from right to left.\n     * @returns {Array} Returns the range of numbers.\n     */\n    function baseRange(start, end, step, fromRight) {\n      var index = -1,\n          length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),\n          result = Array(length);\n\n      while (length--) {\n        result[fromRight ? length : ++index] = start;\n        start += step;\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.repeat` which doesn't coerce arguments.\n     *\n     * @private\n     * @param {string} string The string to repeat.\n     * @param {number} n The number of times to repeat the string.\n     * @returns {string} Returns the repeated string.\n     */\n    function baseRepeat(string, n) {\n      var result = '';\n      if (!string || n < 1 || n > MAX_SAFE_INTEGER) {\n        return result;\n      }\n      // Leverage the exponentiation by squaring algorithm for a faster repeat.\n      // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.\n      do {\n        if (n % 2) {\n          result += string;\n        }\n        n = nativeFloor(n / 2);\n        if (n) {\n          string += string;\n        }\n      } while (n);\n\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.rest` which doesn't validate or coerce arguments.\n     *\n     * @private\n     * @param {Function} func The function to apply a rest parameter to.\n     * @param {number} [start=func.length-1] The start position of the rest parameter.\n     * @returns {Function} Returns the new function.\n     */\n    function baseRest(func, start) {\n      return setToString(overRest(func, start, identity), func + '');\n    }\n\n    /**\n     * The base implementation of `_.sample`.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to sample.\n     * @returns {*} Returns the random element.\n     */\n    function baseSample(collection) {\n      return arraySample(values(collection));\n    }\n\n    /**\n     * The base implementation of `_.sampleSize` without param guards.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to sample.\n     * @param {number} n The number of elements to sample.\n     * @returns {Array} Returns the random elements.\n     */\n    function baseSampleSize(collection, n) {\n      var array = values(collection);\n      return shuffleSelf(array, baseClamp(n, 0, array.length));\n    }\n\n    /**\n     * The base implementation of `_.set`.\n     *\n     * @private\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The path of the property to set.\n     * @param {*} value The value to set.\n     * @param {Function} [customizer] The function to customize path creation.\n     * @returns {Object} Returns `object`.\n     */\n    function baseSet(object, path, value, customizer) {\n      if (!isObject(object)) {\n        return object;\n      }\n      path = castPath(path, object);\n\n      var index = -1,\n          length = path.length,\n          lastIndex = length - 1,\n          nested = object;\n\n      while (nested != null && ++index < length) {\n        var key = toKey(path[index]),\n            newValue = value;\n\n        if (index != lastIndex) {\n          var objValue = nested[key];\n          newValue = customizer ? customizer(objValue, key, nested) : undefined;\n          if (newValue === undefined) {\n            newValue = isObject(objValue)\n              ? objValue\n              : (isIndex(path[index + 1]) ? [] : {});\n          }\n        }\n        assignValue(nested, key, newValue);\n        nested = nested[key];\n      }\n      return object;\n    }\n\n    /**\n     * The base implementation of `setData` without support for hot loop shorting.\n     *\n     * @private\n     * @param {Function} func The function to associate metadata with.\n     * @param {*} data The metadata.\n     * @returns {Function} Returns `func`.\n     */\n    var baseSetData = !metaMap ? identity : function(func, data) {\n      metaMap.set(func, data);\n      return func;\n    };\n\n    /**\n     * The base implementation of `setToString` without support for hot loop shorting.\n     *\n     * @private\n     * @param {Function} func The function to modify.\n     * @param {Function} string The `toString` result.\n     * @returns {Function} Returns `func`.\n     */\n    var baseSetToString = !defineProperty ? identity : function(func, string) {\n      return defineProperty(func, 'toString', {\n        'configurable': true,\n        'enumerable': false,\n        'value': constant(string),\n        'writable': true\n      });\n    };\n\n    /**\n     * The base implementation of `_.shuffle`.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to shuffle.\n     * @returns {Array} Returns the new shuffled array.\n     */\n    function baseShuffle(collection) {\n      return shuffleSelf(values(collection));\n    }\n\n    /**\n     * The base implementation of `_.slice` without an iteratee call guard.\n     *\n     * @private\n     * @param {Array} array The array to slice.\n     * @param {number} [start=0] The start position.\n     * @param {number} [end=array.length] The end position.\n     * @returns {Array} Returns the slice of `array`.\n     */\n    function baseSlice(array, start, end) {\n      var index = -1,\n          length = array.length;\n\n      if (start < 0) {\n        start = -start > length ? 0 : (length + start);\n      }\n      end = end > length ? length : end;\n      if (end < 0) {\n        end += length;\n      }\n      length = start > end ? 0 : ((end - start) >>> 0);\n      start >>>= 0;\n\n      var result = Array(length);\n      while (++index < length) {\n        result[index] = array[index + start];\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.some` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} predicate The function invoked per iteration.\n     * @returns {boolean} Returns `true` if any element passes the predicate check,\n     *  else `false`.\n     */\n    function baseSome(collection, predicate) {\n      var result;\n\n      baseEach(collection, function(value, index, collection) {\n        result = predicate(value, index, collection);\n        return !result;\n      });\n      return !!result;\n    }\n\n    /**\n     * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which\n     * performs a binary search of `array` to determine the index at which `value`\n     * should be inserted into `array` in order to maintain its sort order.\n     *\n     * @private\n     * @param {Array} array The sorted array to inspect.\n     * @param {*} value The value to evaluate.\n     * @param {boolean} [retHighest] Specify returning the highest qualified index.\n     * @returns {number} Returns the index at which `value` should be inserted\n     *  into `array`.\n     */\n    function baseSortedIndex(array, value, retHighest) {\n      var low = 0,\n          high = array == null ? low : array.length;\n\n      if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {\n        while (low < high) {\n          var mid = (low + high) >>> 1,\n              computed = array[mid];\n\n          if (computed !== null && !isSymbol(computed) &&\n              (retHighest ? (computed <= value) : (computed < value))) {\n            low = mid + 1;\n          } else {\n            high = mid;\n          }\n        }\n        return high;\n      }\n      return baseSortedIndexBy(array, value, identity, retHighest);\n    }\n\n    /**\n     * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`\n     * which invokes `iteratee` for `value` and each element of `array` to compute\n     * their sort ranking. The iteratee is invoked with one argument; (value).\n     *\n     * @private\n     * @param {Array} array The sorted array to inspect.\n     * @param {*} value The value to evaluate.\n     * @param {Function} iteratee The iteratee invoked per element.\n     * @param {boolean} [retHighest] Specify returning the highest qualified index.\n     * @returns {number} Returns the index at which `value` should be inserted\n     *  into `array`.\n     */\n    function baseSortedIndexBy(array, value, iteratee, retHighest) {\n      value = iteratee(value);\n\n      var low = 0,\n          high = array == null ? 0 : array.length,\n          valIsNaN = value !== value,\n          valIsNull = value === null,\n          valIsSymbol = isSymbol(value),\n          valIsUndefined = value === undefined;\n\n      while (low < high) {\n        var mid = nativeFloor((low + high) / 2),\n            computed = iteratee(array[mid]),\n            othIsDefined = computed !== undefined,\n            othIsNull = computed === null,\n            othIsReflexive = computed === computed,\n            othIsSymbol = isSymbol(computed);\n\n        if (valIsNaN) {\n          var setLow = retHighest || othIsReflexive;\n        } else if (valIsUndefined) {\n          setLow = othIsReflexive && (retHighest || othIsDefined);\n        } else if (valIsNull) {\n          setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);\n        } else if (valIsSymbol) {\n          setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);\n        } else if (othIsNull || othIsSymbol) {\n          setLow = false;\n        } else {\n          setLow = retHighest ? (computed <= value) : (computed < value);\n        }\n        if (setLow) {\n          low = mid + 1;\n        } else {\n          high = mid;\n        }\n      }\n      return nativeMin(high, MAX_ARRAY_INDEX);\n    }\n\n    /**\n     * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without\n     * support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array} array The array to inspect.\n     * @param {Function} [iteratee] The iteratee invoked per element.\n     * @returns {Array} Returns the new duplicate free array.\n     */\n    function baseSortedUniq(array, iteratee) {\n      var index = -1,\n          length = array.length,\n          resIndex = 0,\n          result = [];\n\n      while (++index < length) {\n        var value = array[index],\n            computed = iteratee ? iteratee(value) : value;\n\n        if (!index || !eq(computed, seen)) {\n          var seen = computed;\n          result[resIndex++] = value === 0 ? 0 : value;\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.toNumber` which doesn't ensure correct\n     * conversions of binary, hexadecimal, or octal string values.\n     *\n     * @private\n     * @param {*} value The value to process.\n     * @returns {number} Returns the number.\n     */\n    function baseToNumber(value) {\n      if (typeof value == 'number') {\n        return value;\n      }\n      if (isSymbol(value)) {\n        return NAN;\n      }\n      return +value;\n    }\n\n    /**\n     * The base implementation of `_.toString` which doesn't convert nullish\n     * values to empty strings.\n     *\n     * @private\n     * @param {*} value The value to process.\n     * @returns {string} Returns the string.\n     */\n    function baseToString(value) {\n      // Exit early for strings to avoid a performance hit in some environments.\n      if (typeof value == 'string') {\n        return value;\n      }\n      if (isArray(value)) {\n        // Recursively convert values (susceptible to call stack limits).\n        return arrayMap(value, baseToString) + '';\n      }\n      if (isSymbol(value)) {\n        return symbolToString ? symbolToString.call(value) : '';\n      }\n      var result = (value + '');\n      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n    }\n\n    /**\n     * The base implementation of `_.uniqBy` without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array} array The array to inspect.\n     * @param {Function} [iteratee] The iteratee invoked per element.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new duplicate free array.\n     */\n    function baseUniq(array, iteratee, comparator) {\n      var index = -1,\n          includes = arrayIncludes,\n          length = array.length,\n          isCommon = true,\n          result = [],\n          seen = result;\n\n      if (comparator) {\n        isCommon = false;\n        includes = arrayIncludesWith;\n      }\n      else if (length >= LARGE_ARRAY_SIZE) {\n        var set = iteratee ? null : createSet(array);\n        if (set) {\n          return setToArray(set);\n        }\n        isCommon = false;\n        includes = cacheHas;\n        seen = new SetCache;\n      }\n      else {\n        seen = iteratee ? [] : result;\n      }\n      outer:\n      while (++index < length) {\n        var value = array[index],\n            computed = iteratee ? iteratee(value) : value;\n\n        value = (comparator || value !== 0) ? value : 0;\n        if (isCommon && computed === computed) {\n          var seenIndex = seen.length;\n          while (seenIndex--) {\n            if (seen[seenIndex] === computed) {\n              continue outer;\n            }\n          }\n          if (iteratee) {\n            seen.push(computed);\n          }\n          result.push(value);\n        }\n        else if (!includes(seen, computed, comparator)) {\n          if (seen !== result) {\n            seen.push(computed);\n          }\n          result.push(value);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * The base implementation of `_.unset`.\n     *\n     * @private\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The property path to unset.\n     * @returns {boolean} Returns `true` if the property is deleted, else `false`.\n     */\n    function baseUnset(object, path) {\n      path = castPath(path, object);\n      object = parent(object, path);\n      return object == null || delete object[toKey(last(path))];\n    }\n\n    /**\n     * The base implementation of `_.update`.\n     *\n     * @private\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The path of the property to update.\n     * @param {Function} updater The function to produce the updated value.\n     * @param {Function} [customizer] The function to customize path creation.\n     * @returns {Object} Returns `object`.\n     */\n    function baseUpdate(object, path, updater, customizer) {\n      return baseSet(object, path, updater(baseGet(object, path)), customizer);\n    }\n\n    /**\n     * The base implementation of methods like `_.dropWhile` and `_.takeWhile`\n     * without support for iteratee shorthands.\n     *\n     * @private\n     * @param {Array} array The array to query.\n     * @param {Function} predicate The function invoked per iteration.\n     * @param {boolean} [isDrop] Specify dropping elements instead of taking them.\n     * @param {boolean} [fromRight] Specify iterating from right to left.\n     * @returns {Array} Returns the slice of `array`.\n     */\n    function baseWhile(array, predicate, isDrop, fromRight) {\n      var length = array.length,\n          index = fromRight ? length : -1;\n\n      while ((fromRight ? index-- : ++index < length) &&\n        predicate(array[index], index, array)) {}\n\n      return isDrop\n        ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))\n        : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));\n    }\n\n    /**\n     * The base implementation of `wrapperValue` which returns the result of\n     * performing a sequence of actions on the unwrapped `value`, where each\n     * successive action is supplied the return value of the previous.\n     *\n     * @private\n     * @param {*} value The unwrapped value.\n     * @param {Array} actions Actions to perform to resolve the unwrapped value.\n     * @returns {*} Returns the resolved value.\n     */\n    function baseWrapperValue(value, actions) {\n      var result = value;\n      if (result instanceof LazyWrapper) {\n        result = result.value();\n      }\n      return arrayReduce(actions, function(result, action) {\n        return action.func.apply(action.thisArg, arrayPush([result], action.args));\n      }, result);\n    }\n\n    /**\n     * The base implementation of methods like `_.xor`, without support for\n     * iteratee shorthands, that accepts an array of arrays to inspect.\n     *\n     * @private\n     * @param {Array} arrays The arrays to inspect.\n     * @param {Function} [iteratee] The iteratee invoked per element.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new array of values.\n     */\n    function baseXor(arrays, iteratee, comparator) {\n      var length = arrays.length;\n      if (length < 2) {\n        return length ? baseUniq(arrays[0]) : [];\n      }\n      var index = -1,\n          result = Array(length);\n\n      while (++index < length) {\n        var array = arrays[index],\n            othIndex = -1;\n\n        while (++othIndex < length) {\n          if (othIndex != index) {\n            result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);\n          }\n        }\n      }\n      return baseUniq(baseFlatten(result, 1), iteratee, comparator);\n    }\n\n    /**\n     * This base implementation of `_.zipObject` which assigns values using `assignFunc`.\n     *\n     * @private\n     * @param {Array} props The property identifiers.\n     * @param {Array} values The property values.\n     * @param {Function} assignFunc The function to assign values.\n     * @returns {Object} Returns the new object.\n     */\n    function baseZipObject(props, values, assignFunc) {\n      var index = -1,\n          length = props.length,\n          valsLength = values.length,\n          result = {};\n\n      while (++index < length) {\n        var value = index < valsLength ? values[index] : undefined;\n        assignFunc(result, props[index], value);\n      }\n      return result;\n    }\n\n    /**\n     * Casts `value` to an empty array if it's not an array like object.\n     *\n     * @private\n     * @param {*} value The value to inspect.\n     * @returns {Array|Object} Returns the cast array-like object.\n     */\n    function castArrayLikeObject(value) {\n      return isArrayLikeObject(value) ? value : [];\n    }\n\n    /**\n     * Casts `value` to `identity` if it's not a function.\n     *\n     * @private\n     * @param {*} value The value to inspect.\n     * @returns {Function} Returns cast function.\n     */\n    function castFunction(value) {\n      return typeof value == 'function' ? value : identity;\n    }\n\n    /**\n     * Casts `value` to a path array if it's not one.\n     *\n     * @private\n     * @param {*} value The value to inspect.\n     * @param {Object} [object] The object to query keys on.\n     * @returns {Array} Returns the cast property path array.\n     */\n    function castPath(value, object) {\n      if (isArray(value)) {\n        return value;\n      }\n      return isKey(value, object) ? [value] : stringToPath(toString(value));\n    }\n\n    /**\n     * A `baseRest` alias which can be replaced with `identity` by module\n     * replacement plugins.\n     *\n     * @private\n     * @type {Function}\n     * @param {Function} func The function to apply a rest parameter to.\n     * @returns {Function} Returns the new function.\n     */\n    var castRest = baseRest;\n\n    /**\n     * Casts `array` to a slice if it's needed.\n     *\n     * @private\n     * @param {Array} array The array to inspect.\n     * @param {number} start The start position.\n     * @param {number} [end=array.length] The end position.\n     * @returns {Array} Returns the cast slice.\n     */\n    function castSlice(array, start, end) {\n      var length = array.length;\n      end = end === undefined ? length : end;\n      return (!start && end >= length) ? array : baseSlice(array, start, end);\n    }\n\n    /**\n     * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).\n     *\n     * @private\n     * @param {number|Object} id The timer id or timeout object of the timer to clear.\n     */\n    var clearTimeout = ctxClearTimeout || function(id) {\n      return root.clearTimeout(id);\n    };\n\n    /**\n     * Creates a clone of  `buffer`.\n     *\n     * @private\n     * @param {Buffer} buffer The buffer to clone.\n     * @param {boolean} [isDeep] Specify a deep clone.\n     * @returns {Buffer} Returns the cloned buffer.\n     */\n    function cloneBuffer(buffer, isDeep) {\n      if (isDeep) {\n        return buffer.slice();\n      }\n      var length = buffer.length,\n          result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);\n\n      buffer.copy(result);\n      return result;\n    }\n\n    /**\n     * Creates a clone of `arrayBuffer`.\n     *\n     * @private\n     * @param {ArrayBuffer} arrayBuffer The array buffer to clone.\n     * @returns {ArrayBuffer} Returns the cloned array buffer.\n     */\n    function cloneArrayBuffer(arrayBuffer) {\n      var result = new arrayBuffer.constructor(arrayBuffer.byteLength);\n      new Uint8Array(result).set(new Uint8Array(arrayBuffer));\n      return result;\n    }\n\n    /**\n     * Creates a clone of `dataView`.\n     *\n     * @private\n     * @param {Object} dataView The data view to clone.\n     * @param {boolean} [isDeep] Specify a deep clone.\n     * @returns {Object} Returns the cloned data view.\n     */\n    function cloneDataView(dataView, isDeep) {\n      var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;\n      return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);\n    }\n\n    /**\n     * Creates a clone of `map`.\n     *\n     * @private\n     * @param {Object} map The map to clone.\n     * @param {Function} cloneFunc The function to clone values.\n     * @param {boolean} [isDeep] Specify a deep clone.\n     * @returns {Object} Returns the cloned map.\n     */\n    function cloneMap(map, isDeep, cloneFunc) {\n      var array = isDeep ? cloneFunc(mapToArray(map), CLONE_DEEP_FLAG) : mapToArray(map);\n      return arrayReduce(array, addMapEntry, new map.constructor);\n    }\n\n    /**\n     * Creates a clone of `regexp`.\n     *\n     * @private\n     * @param {Object} regexp The regexp to clone.\n     * @returns {Object} Returns the cloned regexp.\n     */\n    function cloneRegExp(regexp) {\n      var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));\n      result.lastIndex = regexp.lastIndex;\n      return result;\n    }\n\n    /**\n     * Creates a clone of `set`.\n     *\n     * @private\n     * @param {Object} set The set to clone.\n     * @param {Function} cloneFunc The function to clone values.\n     * @param {boolean} [isDeep] Specify a deep clone.\n     * @returns {Object} Returns the cloned set.\n     */\n    function cloneSet(set, isDeep, cloneFunc) {\n      var array = isDeep ? cloneFunc(setToArray(set), CLONE_DEEP_FLAG) : setToArray(set);\n      return arrayReduce(array, addSetEntry, new set.constructor);\n    }\n\n    /**\n     * Creates a clone of the `symbol` object.\n     *\n     * @private\n     * @param {Object} symbol The symbol object to clone.\n     * @returns {Object} Returns the cloned symbol object.\n     */\n    function cloneSymbol(symbol) {\n      return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};\n    }\n\n    /**\n     * Creates a clone of `typedArray`.\n     *\n     * @private\n     * @param {Object} typedArray The typed array to clone.\n     * @param {boolean} [isDeep] Specify a deep clone.\n     * @returns {Object} Returns the cloned typed array.\n     */\n    function cloneTypedArray(typedArray, isDeep) {\n      var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;\n      return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);\n    }\n\n    /**\n     * Compares values to sort them in ascending order.\n     *\n     * @private\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {number} Returns the sort order indicator for `value`.\n     */\n    function compareAscending(value, other) {\n      if (value !== other) {\n        var valIsDefined = value !== undefined,\n            valIsNull = value === null,\n            valIsReflexive = value === value,\n            valIsSymbol = isSymbol(value);\n\n        var othIsDefined = other !== undefined,\n            othIsNull = other === null,\n            othIsReflexive = other === other,\n            othIsSymbol = isSymbol(other);\n\n        if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||\n            (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||\n            (valIsNull && othIsDefined && othIsReflexive) ||\n            (!valIsDefined && othIsReflexive) ||\n            !valIsReflexive) {\n          return 1;\n        }\n        if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||\n            (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||\n            (othIsNull && valIsDefined && valIsReflexive) ||\n            (!othIsDefined && valIsReflexive) ||\n            !othIsReflexive) {\n          return -1;\n        }\n      }\n      return 0;\n    }\n\n    /**\n     * Used by `_.orderBy` to compare multiple properties of a value to another\n     * and stable sort them.\n     *\n     * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,\n     * specify an order of \"desc\" for descending or \"asc\" for ascending sort order\n     * of corresponding values.\n     *\n     * @private\n     * @param {Object} object The object to compare.\n     * @param {Object} other The other object to compare.\n     * @param {boolean[]|string[]} orders The order to sort by for each property.\n     * @returns {number} Returns the sort order indicator for `object`.\n     */\n    function compareMultiple(object, other, orders) {\n      var index = -1,\n          objCriteria = object.criteria,\n          othCriteria = other.criteria,\n          length = objCriteria.length,\n          ordersLength = orders.length;\n\n      while (++index < length) {\n        var result = compareAscending(objCriteria[index], othCriteria[index]);\n        if (result) {\n          if (index >= ordersLength) {\n            return result;\n          }\n          var order = orders[index];\n          return result * (order == 'desc' ? -1 : 1);\n        }\n      }\n      // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications\n      // that causes it, under certain circumstances, to provide the same value for\n      // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247\n      // for more details.\n      //\n      // This also ensures a stable sort in V8 and other engines.\n      // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.\n      return object.index - other.index;\n    }\n\n    /**\n     * Creates an array that is the composition of partially applied arguments,\n     * placeholders, and provided arguments into a single array of arguments.\n     *\n     * @private\n     * @param {Array} args The provided arguments.\n     * @param {Array} partials The arguments to prepend to those provided.\n     * @param {Array} holders The `partials` placeholder indexes.\n     * @params {boolean} [isCurried] Specify composing for a curried function.\n     * @returns {Array} Returns the new array of composed arguments.\n     */\n    function composeArgs(args, partials, holders, isCurried) {\n      var argsIndex = -1,\n          argsLength = args.length,\n          holdersLength = holders.length,\n          leftIndex = -1,\n          leftLength = partials.length,\n          rangeLength = nativeMax(argsLength - holdersLength, 0),\n          result = Array(leftLength + rangeLength),\n          isUncurried = !isCurried;\n\n      while (++leftIndex < leftLength) {\n        result[leftIndex] = partials[leftIndex];\n      }\n      while (++argsIndex < holdersLength) {\n        if (isUncurried || argsIndex < argsLength) {\n          result[holders[argsIndex]] = args[argsIndex];\n        }\n      }\n      while (rangeLength--) {\n        result[leftIndex++] = args[argsIndex++];\n      }\n      return result;\n    }\n\n    /**\n     * This function is like `composeArgs` except that the arguments composition\n     * is tailored for `_.partialRight`.\n     *\n     * @private\n     * @param {Array} args The provided arguments.\n     * @param {Array} partials The arguments to append to those provided.\n     * @param {Array} holders The `partials` placeholder indexes.\n     * @params {boolean} [isCurried] Specify composing for a curried function.\n     * @returns {Array} Returns the new array of composed arguments.\n     */\n    function composeArgsRight(args, partials, holders, isCurried) {\n      var argsIndex = -1,\n          argsLength = args.length,\n          holdersIndex = -1,\n          holdersLength = holders.length,\n          rightIndex = -1,\n          rightLength = partials.length,\n          rangeLength = nativeMax(argsLength - holdersLength, 0),\n          result = Array(rangeLength + rightLength),\n          isUncurried = !isCurried;\n\n      while (++argsIndex < rangeLength) {\n        result[argsIndex] = args[argsIndex];\n      }\n      var offset = argsIndex;\n      while (++rightIndex < rightLength) {\n        result[offset + rightIndex] = partials[rightIndex];\n      }\n      while (++holdersIndex < holdersLength) {\n        if (isUncurried || argsIndex < argsLength) {\n          result[offset + holders[holdersIndex]] = args[argsIndex++];\n        }\n      }\n      return result;\n    }\n\n    /**\n     * Copies the values of `source` to `array`.\n     *\n     * @private\n     * @param {Array} source The array to copy values from.\n     * @param {Array} [array=[]] The array to copy values to.\n     * @returns {Array} Returns `array`.\n     */\n    function copyArray(source, array) {\n      var index = -1,\n          length = source.length;\n\n      array || (array = Array(length));\n      while (++index < length) {\n        array[index] = source[index];\n      }\n      return array;\n    }\n\n    /**\n     * Copies properties of `source` to `object`.\n     *\n     * @private\n     * @param {Object} source The object to copy properties from.\n     * @param {Array} props The property identifiers to copy.\n     * @param {Object} [object={}] The object to copy properties to.\n     * @param {Function} [customizer] The function to customize copied values.\n     * @returns {Object} Returns `object`.\n     */\n    function copyObject(source, props, object, customizer) {\n      var isNew = !object;\n      object || (object = {});\n\n      var index = -1,\n          length = props.length;\n\n      while (++index < length) {\n        var key = props[index];\n\n        var newValue = customizer\n          ? customizer(object[key], source[key], key, object, source)\n          : undefined;\n\n        if (newValue === undefined) {\n          newValue = source[key];\n        }\n        if (isNew) {\n          baseAssignValue(object, key, newValue);\n        } else {\n          assignValue(object, key, newValue);\n        }\n      }\n      return object;\n    }\n\n    /**\n     * Copies own symbols of `source` to `object`.\n     *\n     * @private\n     * @param {Object} source The object to copy symbols from.\n     * @param {Object} [object={}] The object to copy symbols to.\n     * @returns {Object} Returns `object`.\n     */\n    function copySymbols(source, object) {\n      return copyObject(source, getSymbols(source), object);\n    }\n\n    /**\n     * Copies own and inherited symbols of `source` to `object`.\n     *\n     * @private\n     * @param {Object} source The object to copy symbols from.\n     * @param {Object} [object={}] The object to copy symbols to.\n     * @returns {Object} Returns `object`.\n     */\n    function copySymbolsIn(source, object) {\n      return copyObject(source, getSymbolsIn(source), object);\n    }\n\n    /**\n     * Creates a function like `_.groupBy`.\n     *\n     * @private\n     * @param {Function} setter The function to set accumulator values.\n     * @param {Function} [initializer] The accumulator object initializer.\n     * @returns {Function} Returns the new aggregator function.\n     */\n    function createAggregator(setter, initializer) {\n      return function(collection, iteratee) {\n        var func = isArray(collection) ? arrayAggregator : baseAggregator,\n            accumulator = initializer ? initializer() : {};\n\n        return func(collection, setter, getIteratee(iteratee, 2), accumulator);\n      };\n    }\n\n    /**\n     * Creates a function like `_.assign`.\n     *\n     * @private\n     * @param {Function} assigner The function to assign values.\n     * @returns {Function} Returns the new assigner function.\n     */\n    function createAssigner(assigner) {\n      return baseRest(function(object, sources) {\n        var index = -1,\n            length = sources.length,\n            customizer = length > 1 ? sources[length - 1] : undefined,\n            guard = length > 2 ? sources[2] : undefined;\n\n        customizer = (assigner.length > 3 && typeof customizer == 'function')\n          ? (length--, customizer)\n          : undefined;\n\n        if (guard && isIterateeCall(sources[0], sources[1], guard)) {\n          customizer = length < 3 ? undefined : customizer;\n          length = 1;\n        }\n        object = Object(object);\n        while (++index < length) {\n          var source = sources[index];\n          if (source) {\n            assigner(object, source, index, customizer);\n          }\n        }\n        return object;\n      });\n    }\n\n    /**\n     * Creates a `baseEach` or `baseEachRight` function.\n     *\n     * @private\n     * @param {Function} eachFunc The function to iterate over a collection.\n     * @param {boolean} [fromRight] Specify iterating from right to left.\n     * @returns {Function} Returns the new base function.\n     */\n    function createBaseEach(eachFunc, fromRight) {\n      return function(collection, iteratee) {\n        if (collection == null) {\n          return collection;\n        }\n        if (!isArrayLike(collection)) {\n          return eachFunc(collection, iteratee);\n        }\n        var length = collection.length,\n            index = fromRight ? length : -1,\n            iterable = Object(collection);\n\n        while ((fromRight ? index-- : ++index < length)) {\n          if (iteratee(iterable[index], index, iterable) === false) {\n            break;\n          }\n        }\n        return collection;\n      };\n    }\n\n    /**\n     * Creates a base function for methods like `_.forIn` and `_.forOwn`.\n     *\n     * @private\n     * @param {boolean} [fromRight] Specify iterating from right to left.\n     * @returns {Function} Returns the new base function.\n     */\n    function createBaseFor(fromRight) {\n      return function(object, iteratee, keysFunc) {\n        var index = -1,\n            iterable = Object(object),\n            props = keysFunc(object),\n            length = props.length;\n\n        while (length--) {\n          var key = props[fromRight ? length : ++index];\n          if (iteratee(iterable[key], key, iterable) === false) {\n            break;\n          }\n        }\n        return object;\n      };\n    }\n\n    /**\n     * Creates a function that wraps `func` to invoke it with the optional `this`\n     * binding of `thisArg`.\n     *\n     * @private\n     * @param {Function} func The function to wrap.\n     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n     * @param {*} [thisArg] The `this` binding of `func`.\n     * @returns {Function} Returns the new wrapped function.\n     */\n    function createBind(func, bitmask, thisArg) {\n      var isBind = bitmask & WRAP_BIND_FLAG,\n          Ctor = createCtor(func);\n\n      function wrapper() {\n        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;\n        return fn.apply(isBind ? thisArg : this, arguments);\n      }\n      return wrapper;\n    }\n\n    /**\n     * Creates a function like `_.lowerFirst`.\n     *\n     * @private\n     * @param {string} methodName The name of the `String` case method to use.\n     * @returns {Function} Returns the new case function.\n     */\n    function createCaseFirst(methodName) {\n      return function(string) {\n        string = toString(string);\n\n        var strSymbols = hasUnicode(string)\n          ? stringToArray(string)\n          : undefined;\n\n        var chr = strSymbols\n          ? strSymbols[0]\n          : string.charAt(0);\n\n        var trailing = strSymbols\n          ? castSlice(strSymbols, 1).join('')\n          : string.slice(1);\n\n        return chr[methodName]() + trailing;\n      };\n    }\n\n    /**\n     * Creates a function like `_.camelCase`.\n     *\n     * @private\n     * @param {Function} callback The function to combine each word.\n     * @returns {Function} Returns the new compounder function.\n     */\n    function createCompounder(callback) {\n      return function(string) {\n        return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');\n      };\n    }\n\n    /**\n     * Creates a function that produces an instance of `Ctor` regardless of\n     * whether it was invoked as part of a `new` expression or by `call` or `apply`.\n     *\n     * @private\n     * @param {Function} Ctor The constructor to wrap.\n     * @returns {Function} Returns the new wrapped function.\n     */\n    function createCtor(Ctor) {\n      return function() {\n        // Use a `switch` statement to work with class constructors. See\n        // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist\n        // for more details.\n        var args = arguments;\n        switch (args.length) {\n          case 0: return new Ctor;\n          case 1: return new Ctor(args[0]);\n          case 2: return new Ctor(args[0], args[1]);\n          case 3: return new Ctor(args[0], args[1], args[2]);\n          case 4: return new Ctor(args[0], args[1], args[2], args[3]);\n          case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);\n          case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);\n          case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);\n        }\n        var thisBinding = baseCreate(Ctor.prototype),\n            result = Ctor.apply(thisBinding, args);\n\n        // Mimic the constructor's `return` behavior.\n        // See https://es5.github.io/#x13.2.2 for more details.\n        return isObject(result) ? result : thisBinding;\n      };\n    }\n\n    /**\n     * Creates a function that wraps `func` to enable currying.\n     *\n     * @private\n     * @param {Function} func The function to wrap.\n     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n     * @param {number} arity The arity of `func`.\n     * @returns {Function} Returns the new wrapped function.\n     */\n    function createCurry(func, bitmask, arity) {\n      var Ctor = createCtor(func);\n\n      function wrapper() {\n        var length = arguments.length,\n            args = Array(length),\n            index = length,\n            placeholder = getHolder(wrapper);\n\n        while (index--) {\n          args[index] = arguments[index];\n        }\n        var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)\n          ? []\n          : replaceHolders(args, placeholder);\n\n        length -= holders.length;\n        if (length < arity) {\n          return createRecurry(\n            func, bitmask, createHybrid, wrapper.placeholder, undefined,\n            args, holders, undefined, undefined, arity - length);\n        }\n        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;\n        return apply(fn, this, args);\n      }\n      return wrapper;\n    }\n\n    /**\n     * Creates a `_.find` or `_.findLast` function.\n     *\n     * @private\n     * @param {Function} findIndexFunc The function to find the collection index.\n     * @returns {Function} Returns the new find function.\n     */\n    function createFind(findIndexFunc) {\n      return function(collection, predicate, fromIndex) {\n        var iterable = Object(collection);\n        if (!isArrayLike(collection)) {\n          var iteratee = getIteratee(predicate, 3);\n          collection = keys(collection);\n          predicate = function(key) { return iteratee(iterable[key], key, iterable); };\n        }\n        var index = findIndexFunc(collection, predicate, fromIndex);\n        return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;\n      };\n    }\n\n    /**\n     * Creates a `_.flow` or `_.flowRight` function.\n     *\n     * @private\n     * @param {boolean} [fromRight] Specify iterating from right to left.\n     * @returns {Function} Returns the new flow function.\n     */\n    function createFlow(fromRight) {\n      return flatRest(function(funcs) {\n        var length = funcs.length,\n            index = length,\n            prereq = LodashWrapper.prototype.thru;\n\n        if (fromRight) {\n          funcs.reverse();\n        }\n        while (index--) {\n          var func = funcs[index];\n          if (typeof func != 'function') {\n            throw new TypeError(FUNC_ERROR_TEXT);\n          }\n          if (prereq && !wrapper && getFuncName(func) == 'wrapper') {\n            var wrapper = new LodashWrapper([], true);\n          }\n        }\n        index = wrapper ? index : length;\n        while (++index < length) {\n          func = funcs[index];\n\n          var funcName = getFuncName(func),\n              data = funcName == 'wrapper' ? getData(func) : undefined;\n\n          if (data && isLaziable(data[0]) &&\n                data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&\n                !data[4].length && data[9] == 1\n              ) {\n            wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);\n          } else {\n            wrapper = (func.length == 1 && isLaziable(func))\n              ? wrapper[funcName]()\n              : wrapper.thru(func);\n          }\n        }\n        return function() {\n          var args = arguments,\n              value = args[0];\n\n          if (wrapper && args.length == 1 && isArray(value)) {\n            return wrapper.plant(value).value();\n          }\n          var index = 0,\n              result = length ? funcs[index].apply(this, args) : value;\n\n          while (++index < length) {\n            result = funcs[index].call(this, result);\n          }\n          return result;\n        };\n      });\n    }\n\n    /**\n     * Creates a function that wraps `func` to invoke it with optional `this`\n     * binding of `thisArg`, partial application, and currying.\n     *\n     * @private\n     * @param {Function|string} func The function or method name to wrap.\n     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n     * @param {*} [thisArg] The `this` binding of `func`.\n     * @param {Array} [partials] The arguments to prepend to those provided to\n     *  the new function.\n     * @param {Array} [holders] The `partials` placeholder indexes.\n     * @param {Array} [partialsRight] The arguments to append to those provided\n     *  to the new function.\n     * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.\n     * @param {Array} [argPos] The argument positions of the new function.\n     * @param {number} [ary] The arity cap of `func`.\n     * @param {number} [arity] The arity of `func`.\n     * @returns {Function} Returns the new wrapped function.\n     */\n    function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {\n      var isAry = bitmask & WRAP_ARY_FLAG,\n          isBind = bitmask & WRAP_BIND_FLAG,\n          isBindKey = bitmask & WRAP_BIND_KEY_FLAG,\n          isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),\n          isFlip = bitmask & WRAP_FLIP_FLAG,\n          Ctor = isBindKey ? undefined : createCtor(func);\n\n      function wrapper() {\n        var length = arguments.length,\n            args = Array(length),\n            index = length;\n\n        while (index--) {\n          args[index] = arguments[index];\n        }\n        if (isCurried) {\n          var placeholder = getHolder(wrapper),\n              holdersCount = countHolders(args, placeholder);\n        }\n        if (partials) {\n          args = composeArgs(args, partials, holders, isCurried);\n        }\n        if (partialsRight) {\n          args = composeArgsRight(args, partialsRight, holdersRight, isCurried);\n        }\n        length -= holdersCount;\n        if (isCurried && length < arity) {\n          var newHolders = replaceHolders(args, placeholder);\n          return createRecurry(\n            func, bitmask, createHybrid, wrapper.placeholder, thisArg,\n            args, newHolders, argPos, ary, arity - length\n          );\n        }\n        var thisBinding = isBind ? thisArg : this,\n            fn = isBindKey ? thisBinding[func] : func;\n\n        length = args.length;\n        if (argPos) {\n          args = reorder(args, argPos);\n        } else if (isFlip && length > 1) {\n          args.reverse();\n        }\n        if (isAry && ary < length) {\n          args.length = ary;\n        }\n        if (this && this !== root && this instanceof wrapper) {\n          fn = Ctor || createCtor(fn);\n        }\n        return fn.apply(thisBinding, args);\n      }\n      return wrapper;\n    }\n\n    /**\n     * Creates a function like `_.invertBy`.\n     *\n     * @private\n     * @param {Function} setter The function to set accumulator values.\n     * @param {Function} toIteratee The function to resolve iteratees.\n     * @returns {Function} Returns the new inverter function.\n     */\n    function createInverter(setter, toIteratee) {\n      return function(object, iteratee) {\n        return baseInverter(object, setter, toIteratee(iteratee), {});\n      };\n    }\n\n    /**\n     * Creates a function that performs a mathematical operation on two values.\n     *\n     * @private\n     * @param {Function} operator The function to perform the operation.\n     * @param {number} [defaultValue] The value used for `undefined` arguments.\n     * @returns {Function} Returns the new mathematical operation function.\n     */\n    function createMathOperation(operator, defaultValue) {\n      return function(value, other) {\n        var result;\n        if (value === undefined && other === undefined) {\n          return defaultValue;\n        }\n        if (value !== undefined) {\n          result = value;\n        }\n        if (other !== undefined) {\n          if (result === undefined) {\n            return other;\n          }\n          if (typeof value == 'string' || typeof other == 'string') {\n            value = baseToString(value);\n            other = baseToString(other);\n          } else {\n            value = baseToNumber(value);\n            other = baseToNumber(other);\n          }\n          result = operator(value, other);\n        }\n        return result;\n      };\n    }\n\n    /**\n     * Creates a function like `_.over`.\n     *\n     * @private\n     * @param {Function} arrayFunc The function to iterate over iteratees.\n     * @returns {Function} Returns the new over function.\n     */\n    function createOver(arrayFunc) {\n      return flatRest(function(iteratees) {\n        iteratees = arrayMap(iteratees, baseUnary(getIteratee()));\n        return baseRest(function(args) {\n          var thisArg = this;\n          return arrayFunc(iteratees, function(iteratee) {\n            return apply(iteratee, thisArg, args);\n          });\n        });\n      });\n    }\n\n    /**\n     * Creates the padding for `string` based on `length`. The `chars` string\n     * is truncated if the number of characters exceeds `length`.\n     *\n     * @private\n     * @param {number} length The padding length.\n     * @param {string} [chars=' '] The string used as padding.\n     * @returns {string} Returns the padding for `string`.\n     */\n    function createPadding(length, chars) {\n      chars = chars === undefined ? ' ' : baseToString(chars);\n\n      var charsLength = chars.length;\n      if (charsLength < 2) {\n        return charsLength ? baseRepeat(chars, length) : chars;\n      }\n      var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));\n      return hasUnicode(chars)\n        ? castSlice(stringToArray(result), 0, length).join('')\n        : result.slice(0, length);\n    }\n\n    /**\n     * Creates a function that wraps `func` to invoke it with the `this` binding\n     * of `thisArg` and `partials` prepended to the arguments it receives.\n     *\n     * @private\n     * @param {Function} func The function to wrap.\n     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n     * @param {*} thisArg The `this` binding of `func`.\n     * @param {Array} partials The arguments to prepend to those provided to\n     *  the new function.\n     * @returns {Function} Returns the new wrapped function.\n     */\n    function createPartial(func, bitmask, thisArg, partials) {\n      var isBind = bitmask & WRAP_BIND_FLAG,\n          Ctor = createCtor(func);\n\n      function wrapper() {\n        var argsIndex = -1,\n            argsLength = arguments.length,\n            leftIndex = -1,\n            leftLength = partials.length,\n            args = Array(leftLength + argsLength),\n            fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;\n\n        while (++leftIndex < leftLength) {\n          args[leftIndex] = partials[leftIndex];\n        }\n        while (argsLength--) {\n          args[leftIndex++] = arguments[++argsIndex];\n        }\n        return apply(fn, isBind ? thisArg : this, args);\n      }\n      return wrapper;\n    }\n\n    /**\n     * Creates a `_.range` or `_.rangeRight` function.\n     *\n     * @private\n     * @param {boolean} [fromRight] Specify iterating from right to left.\n     * @returns {Function} Returns the new range function.\n     */\n    function createRange(fromRight) {\n      return function(start, end, step) {\n        if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {\n          end = step = undefined;\n        }\n        // Ensure the sign of `-0` is preserved.\n        start = toFinite(start);\n        if (end === undefined) {\n          end = start;\n          start = 0;\n        } else {\n          end = toFinite(end);\n        }\n        step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);\n        return baseRange(start, end, step, fromRight);\n      };\n    }\n\n    /**\n     * Creates a function that performs a relational operation on two values.\n     *\n     * @private\n     * @param {Function} operator The function to perform the operation.\n     * @returns {Function} Returns the new relational operation function.\n     */\n    function createRelationalOperation(operator) {\n      return function(value, other) {\n        if (!(typeof value == 'string' && typeof other == 'string')) {\n          value = toNumber(value);\n          other = toNumber(other);\n        }\n        return operator(value, other);\n      };\n    }\n\n    /**\n     * Creates a function that wraps `func` to continue currying.\n     *\n     * @private\n     * @param {Function} func The function to wrap.\n     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n     * @param {Function} wrapFunc The function to create the `func` wrapper.\n     * @param {*} placeholder The placeholder value.\n     * @param {*} [thisArg] The `this` binding of `func`.\n     * @param {Array} [partials] The arguments to prepend to those provided to\n     *  the new function.\n     * @param {Array} [holders] The `partials` placeholder indexes.\n     * @param {Array} [argPos] The argument positions of the new function.\n     * @param {number} [ary] The arity cap of `func`.\n     * @param {number} [arity] The arity of `func`.\n     * @returns {Function} Returns the new wrapped function.\n     */\n    function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {\n      var isCurry = bitmask & WRAP_CURRY_FLAG,\n          newHolders = isCurry ? holders : undefined,\n          newHoldersRight = isCurry ? undefined : holders,\n          newPartials = isCurry ? partials : undefined,\n          newPartialsRight = isCurry ? undefined : partials;\n\n      bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);\n      bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);\n\n      if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {\n        bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);\n      }\n      var newData = [\n        func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,\n        newHoldersRight, argPos, ary, arity\n      ];\n\n      var result = wrapFunc.apply(undefined, newData);\n      if (isLaziable(func)) {\n        setData(result, newData);\n      }\n      result.placeholder = placeholder;\n      return setWrapToString(result, func, bitmask);\n    }\n\n    /**\n     * Creates a function like `_.round`.\n     *\n     * @private\n     * @param {string} methodName The name of the `Math` method to use when rounding.\n     * @returns {Function} Returns the new round function.\n     */\n    function createRound(methodName) {\n      var func = Math[methodName];\n      return function(number, precision) {\n        number = toNumber(number);\n        precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);\n        if (precision) {\n          // Shift with exponential notation to avoid floating-point issues.\n          // See [MDN](https://mdn.io/round#Examples) for more details.\n          var pair = (toString(number) + 'e').split('e'),\n              value = func(pair[0] + 'e' + (+pair[1] + precision));\n\n          pair = (toString(value) + 'e').split('e');\n          return +(pair[0] + 'e' + (+pair[1] - precision));\n        }\n        return func(number);\n      };\n    }\n\n    /**\n     * Creates a set object of `values`.\n     *\n     * @private\n     * @param {Array} values The values to add to the set.\n     * @returns {Object} Returns the new set.\n     */\n    var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {\n      return new Set(values);\n    };\n\n    /**\n     * Creates a `_.toPairs` or `_.toPairsIn` function.\n     *\n     * @private\n     * @param {Function} keysFunc The function to get the keys of a given object.\n     * @returns {Function} Returns the new pairs function.\n     */\n    function createToPairs(keysFunc) {\n      return function(object) {\n        var tag = getTag(object);\n        if (tag == mapTag) {\n          return mapToArray(object);\n        }\n        if (tag == setTag) {\n          return setToPairs(object);\n        }\n        return baseToPairs(object, keysFunc(object));\n      };\n    }\n\n    /**\n     * Creates a function that either curries or invokes `func` with optional\n     * `this` binding and partially applied arguments.\n     *\n     * @private\n     * @param {Function|string} func The function or method name to wrap.\n     * @param {number} bitmask The bitmask flags.\n     *    1 - `_.bind`\n     *    2 - `_.bindKey`\n     *    4 - `_.curry` or `_.curryRight` of a bound function\n     *    8 - `_.curry`\n     *   16 - `_.curryRight`\n     *   32 - `_.partial`\n     *   64 - `_.partialRight`\n     *  128 - `_.rearg`\n     *  256 - `_.ary`\n     *  512 - `_.flip`\n     * @param {*} [thisArg] The `this` binding of `func`.\n     * @param {Array} [partials] The arguments to be partially applied.\n     * @param {Array} [holders] The `partials` placeholder indexes.\n     * @param {Array} [argPos] The argument positions of the new function.\n     * @param {number} [ary] The arity cap of `func`.\n     * @param {number} [arity] The arity of `func`.\n     * @returns {Function} Returns the new wrapped function.\n     */\n    function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {\n      var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;\n      if (!isBindKey && typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      var length = partials ? partials.length : 0;\n      if (!length) {\n        bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);\n        partials = holders = undefined;\n      }\n      ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);\n      arity = arity === undefined ? arity : toInteger(arity);\n      length -= holders ? holders.length : 0;\n\n      if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {\n        var partialsRight = partials,\n            holdersRight = holders;\n\n        partials = holders = undefined;\n      }\n      var data = isBindKey ? undefined : getData(func);\n\n      var newData = [\n        func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,\n        argPos, ary, arity\n      ];\n\n      if (data) {\n        mergeData(newData, data);\n      }\n      func = newData[0];\n      bitmask = newData[1];\n      thisArg = newData[2];\n      partials = newData[3];\n      holders = newData[4];\n      arity = newData[9] = newData[9] === undefined\n        ? (isBindKey ? 0 : func.length)\n        : nativeMax(newData[9] - length, 0);\n\n      if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {\n        bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);\n      }\n      if (!bitmask || bitmask == WRAP_BIND_FLAG) {\n        var result = createBind(func, bitmask, thisArg);\n      } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {\n        result = createCurry(func, bitmask, arity);\n      } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {\n        result = createPartial(func, bitmask, thisArg, partials);\n      } else {\n        result = createHybrid.apply(undefined, newData);\n      }\n      var setter = data ? baseSetData : setData;\n      return setWrapToString(setter(result, newData), func, bitmask);\n    }\n\n    /**\n     * Used by `_.defaults` to customize its `_.assignIn` use to assign properties\n     * of source objects to the destination object for all destination properties\n     * that resolve to `undefined`.\n     *\n     * @private\n     * @param {*} objValue The destination value.\n     * @param {*} srcValue The source value.\n     * @param {string} key The key of the property to assign.\n     * @param {Object} object The parent object of `objValue`.\n     * @returns {*} Returns the value to assign.\n     */\n    function customDefaultsAssignIn(objValue, srcValue, key, object) {\n      if (objValue === undefined ||\n          (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {\n        return srcValue;\n      }\n      return objValue;\n    }\n\n    /**\n     * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source\n     * objects into destination objects that are passed thru.\n     *\n     * @private\n     * @param {*} objValue The destination value.\n     * @param {*} srcValue The source value.\n     * @param {string} key The key of the property to merge.\n     * @param {Object} object The parent object of `objValue`.\n     * @param {Object} source The parent object of `srcValue`.\n     * @param {Object} [stack] Tracks traversed source values and their merged\n     *  counterparts.\n     * @returns {*} Returns the value to assign.\n     */\n    function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {\n      if (isObject(objValue) && isObject(srcValue)) {\n        // Recursively merge objects and arrays (susceptible to call stack limits).\n        stack.set(srcValue, objValue);\n        baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);\n        stack['delete'](srcValue);\n      }\n      return objValue;\n    }\n\n    /**\n     * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain\n     * objects.\n     *\n     * @private\n     * @param {*} value The value to inspect.\n     * @param {string} key The key of the property to inspect.\n     * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.\n     */\n    function customOmitClone(value) {\n      return isPlainObject(value) ? undefined : value;\n    }\n\n    /**\n     * A specialized version of `baseIsEqualDeep` for arrays with support for\n     * partial deep comparisons.\n     *\n     * @private\n     * @param {Array} array The array to compare.\n     * @param {Array} other The other array to compare.\n     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n     * @param {Function} customizer The function to customize comparisons.\n     * @param {Function} equalFunc The function to determine equivalents of values.\n     * @param {Object} stack Tracks traversed `array` and `other` objects.\n     * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n     */\n    function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n          arrLength = array.length,\n          othLength = other.length;\n\n      if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n        return false;\n      }\n      // Assume cyclic values are equal.\n      var stacked = stack.get(array);\n      if (stacked && stack.get(other)) {\n        return stacked == other;\n      }\n      var index = -1,\n          result = true,\n          seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n      stack.set(array, other);\n      stack.set(other, array);\n\n      // Ignore non-index properties.\n      while (++index < arrLength) {\n        var arrValue = array[index],\n            othValue = other[index];\n\n        if (customizer) {\n          var compared = isPartial\n            ? customizer(othValue, arrValue, index, other, array, stack)\n            : customizer(arrValue, othValue, index, array, other, stack);\n        }\n        if (compared !== undefined) {\n          if (compared) {\n            continue;\n          }\n          result = false;\n          break;\n        }\n        // Recursively compare arrays (susceptible to call stack limits).\n        if (seen) {\n          if (!arraySome(other, function(othValue, othIndex) {\n                if (!cacheHas(seen, othIndex) &&\n                    (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n                  return seen.push(othIndex);\n                }\n              })) {\n            result = false;\n            break;\n          }\n        } else if (!(\n              arrValue === othValue ||\n                equalFunc(arrValue, othValue, bitmask, customizer, stack)\n            )) {\n          result = false;\n          break;\n        }\n      }\n      stack['delete'](array);\n      stack['delete'](other);\n      return result;\n    }\n\n    /**\n     * A specialized version of `baseIsEqualDeep` for comparing objects of\n     * the same `toStringTag`.\n     *\n     * **Note:** This function only supports comparing values with tags of\n     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n     *\n     * @private\n     * @param {Object} object The object to compare.\n     * @param {Object} other The other object to compare.\n     * @param {string} tag The `toStringTag` of the objects to compare.\n     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n     * @param {Function} customizer The function to customize comparisons.\n     * @param {Function} equalFunc The function to determine equivalents of values.\n     * @param {Object} stack Tracks traversed `object` and `other` objects.\n     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n     */\n    function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n      switch (tag) {\n        case dataViewTag:\n          if ((object.byteLength != other.byteLength) ||\n              (object.byteOffset != other.byteOffset)) {\n            return false;\n          }\n          object = object.buffer;\n          other = other.buffer;\n\n        case arrayBufferTag:\n          if ((object.byteLength != other.byteLength) ||\n              !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n            return false;\n          }\n          return true;\n\n        case boolTag:\n        case dateTag:\n        case numberTag:\n          // Coerce booleans to `1` or `0` and dates to milliseconds.\n          // Invalid dates are coerced to `NaN`.\n          return eq(+object, +other);\n\n        case errorTag:\n          return object.name == other.name && object.message == other.message;\n\n        case regexpTag:\n        case stringTag:\n          // Coerce regexes to strings and treat strings, primitives and objects,\n          // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n          // for more details.\n          return object == (other + '');\n\n        case mapTag:\n          var convert = mapToArray;\n\n        case setTag:\n          var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n          convert || (convert = setToArray);\n\n          if (object.size != other.size && !isPartial) {\n            return false;\n          }\n          // Assume cyclic values are equal.\n          var stacked = stack.get(object);\n          if (stacked) {\n            return stacked == other;\n          }\n          bitmask |= COMPARE_UNORDERED_FLAG;\n\n          // Recursively compare objects (susceptible to call stack limits).\n          stack.set(object, other);\n          var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n          stack['delete'](object);\n          return result;\n\n        case symbolTag:\n          if (symbolValueOf) {\n            return symbolValueOf.call(object) == symbolValueOf.call(other);\n          }\n      }\n      return false;\n    }\n\n    /**\n     * A specialized version of `baseIsEqualDeep` for objects with support for\n     * partial deep comparisons.\n     *\n     * @private\n     * @param {Object} object The object to compare.\n     * @param {Object} other The other object to compare.\n     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n     * @param {Function} customizer The function to customize comparisons.\n     * @param {Function} equalFunc The function to determine equivalents of values.\n     * @param {Object} stack Tracks traversed `object` and `other` objects.\n     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n     */\n    function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n          objProps = getAllKeys(object),\n          objLength = objProps.length,\n          othProps = getAllKeys(other),\n          othLength = othProps.length;\n\n      if (objLength != othLength && !isPartial) {\n        return false;\n      }\n      var index = objLength;\n      while (index--) {\n        var key = objProps[index];\n        if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n          return false;\n        }\n      }\n      // Assume cyclic values are equal.\n      var stacked = stack.get(object);\n      if (stacked && stack.get(other)) {\n        return stacked == other;\n      }\n      var result = true;\n      stack.set(object, other);\n      stack.set(other, object);\n\n      var skipCtor = isPartial;\n      while (++index < objLength) {\n        key = objProps[index];\n        var objValue = object[key],\n            othValue = other[key];\n\n        if (customizer) {\n          var compared = isPartial\n            ? customizer(othValue, objValue, key, other, object, stack)\n            : customizer(objValue, othValue, key, object, other, stack);\n        }\n        // Recursively compare objects (susceptible to call stack limits).\n        if (!(compared === undefined\n              ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n              : compared\n            )) {\n          result = false;\n          break;\n        }\n        skipCtor || (skipCtor = key == 'constructor');\n      }\n      if (result && !skipCtor) {\n        var objCtor = object.constructor,\n            othCtor = other.constructor;\n\n        // Non `Object` object instances with different constructors are not equal.\n        if (objCtor != othCtor &&\n            ('constructor' in object && 'constructor' in other) &&\n            !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n              typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n          result = false;\n        }\n      }\n      stack['delete'](object);\n      stack['delete'](other);\n      return result;\n    }\n\n    /**\n     * A specialized version of `baseRest` which flattens the rest array.\n     *\n     * @private\n     * @param {Function} func The function to apply a rest parameter to.\n     * @returns {Function} Returns the new function.\n     */\n    function flatRest(func) {\n      return setToString(overRest(func, undefined, flatten), func + '');\n    }\n\n    /**\n     * Creates an array of own enumerable property names and symbols of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property names and symbols.\n     */\n    function getAllKeys(object) {\n      return baseGetAllKeys(object, keys, getSymbols);\n    }\n\n    /**\n     * Creates an array of own and inherited enumerable property names and\n     * symbols of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property names and symbols.\n     */\n    function getAllKeysIn(object) {\n      return baseGetAllKeys(object, keysIn, getSymbolsIn);\n    }\n\n    /**\n     * Gets metadata for `func`.\n     *\n     * @private\n     * @param {Function} func The function to query.\n     * @returns {*} Returns the metadata for `func`.\n     */\n    var getData = !metaMap ? noop : function(func) {\n      return metaMap.get(func);\n    };\n\n    /**\n     * Gets the name of `func`.\n     *\n     * @private\n     * @param {Function} func The function to query.\n     * @returns {string} Returns the function name.\n     */\n    function getFuncName(func) {\n      var result = (func.name + ''),\n          array = realNames[result],\n          length = hasOwnProperty.call(realNames, result) ? array.length : 0;\n\n      while (length--) {\n        var data = array[length],\n            otherFunc = data.func;\n        if (otherFunc == null || otherFunc == func) {\n          return data.name;\n        }\n      }\n      return result;\n    }\n\n    /**\n     * Gets the argument placeholder value for `func`.\n     *\n     * @private\n     * @param {Function} func The function to inspect.\n     * @returns {*} Returns the placeholder value.\n     */\n    function getHolder(func) {\n      var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;\n      return object.placeholder;\n    }\n\n    /**\n     * Gets the appropriate \"iteratee\" function. If `_.iteratee` is customized,\n     * this function returns the custom method, otherwise it returns `baseIteratee`.\n     * If arguments are provided, the chosen function is invoked with them and\n     * its result is returned.\n     *\n     * @private\n     * @param {*} [value] The value to convert to an iteratee.\n     * @param {number} [arity] The arity of the created iteratee.\n     * @returns {Function} Returns the chosen function or its result.\n     */\n    function getIteratee() {\n      var result = lodash.iteratee || iteratee;\n      result = result === iteratee ? baseIteratee : result;\n      return arguments.length ? result(arguments[0], arguments[1]) : result;\n    }\n\n    /**\n     * Gets the data for `map`.\n     *\n     * @private\n     * @param {Object} map The map to query.\n     * @param {string} key The reference key.\n     * @returns {*} Returns the map data.\n     */\n    function getMapData(map, key) {\n      var data = map.__data__;\n      return isKeyable(key)\n        ? data[typeof key == 'string' ? 'string' : 'hash']\n        : data.map;\n    }\n\n    /**\n     * Gets the property names, values, and compare flags of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the match data of `object`.\n     */\n    function getMatchData(object) {\n      var result = keys(object),\n          length = result.length;\n\n      while (length--) {\n        var key = result[length],\n            value = object[key];\n\n        result[length] = [key, value, isStrictComparable(value)];\n      }\n      return result;\n    }\n\n    /**\n     * Gets the native function at `key` of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @param {string} key The key of the method to get.\n     * @returns {*} Returns the function if it's native, else `undefined`.\n     */\n    function getNative(object, key) {\n      var value = getValue(object, key);\n      return baseIsNative(value) ? value : undefined;\n    }\n\n    /**\n     * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n     *\n     * @private\n     * @param {*} value The value to query.\n     * @returns {string} Returns the raw `toStringTag`.\n     */\n    function getRawTag(value) {\n      var isOwn = hasOwnProperty.call(value, symToStringTag),\n          tag = value[symToStringTag];\n\n      try {\n        value[symToStringTag] = undefined;\n        var unmasked = true;\n      } catch (e) {}\n\n      var result = nativeObjectToString.call(value);\n      if (unmasked) {\n        if (isOwn) {\n          value[symToStringTag] = tag;\n        } else {\n          delete value[symToStringTag];\n        }\n      }\n      return result;\n    }\n\n    /**\n     * Creates an array of the own enumerable symbols of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of symbols.\n     */\n    var getSymbols = !nativeGetSymbols ? stubArray : function(object) {\n      if (object == null) {\n        return [];\n      }\n      object = Object(object);\n      return arrayFilter(nativeGetSymbols(object), function(symbol) {\n        return propertyIsEnumerable.call(object, symbol);\n      });\n    };\n\n    /**\n     * Creates an array of the own and inherited enumerable symbols of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of symbols.\n     */\n    var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {\n      var result = [];\n      while (object) {\n        arrayPush(result, getSymbols(object));\n        object = getPrototype(object);\n      }\n      return result;\n    };\n\n    /**\n     * Gets the `toStringTag` of `value`.\n     *\n     * @private\n     * @param {*} value The value to query.\n     * @returns {string} Returns the `toStringTag`.\n     */\n    var getTag = baseGetTag;\n\n    // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.\n    if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||\n        (Map && getTag(new Map) != mapTag) ||\n        (Promise && getTag(Promise.resolve()) != promiseTag) ||\n        (Set && getTag(new Set) != setTag) ||\n        (WeakMap && getTag(new WeakMap) != weakMapTag)) {\n      getTag = function(value) {\n        var result = baseGetTag(value),\n            Ctor = result == objectTag ? value.constructor : undefined,\n            ctorString = Ctor ? toSource(Ctor) : '';\n\n        if (ctorString) {\n          switch (ctorString) {\n            case dataViewCtorString: return dataViewTag;\n            case mapCtorString: return mapTag;\n            case promiseCtorString: return promiseTag;\n            case setCtorString: return setTag;\n            case weakMapCtorString: return weakMapTag;\n          }\n        }\n        return result;\n      };\n    }\n\n    /**\n     * Gets the view, applying any `transforms` to the `start` and `end` positions.\n     *\n     * @private\n     * @param {number} start The start of the view.\n     * @param {number} end The end of the view.\n     * @param {Array} transforms The transformations to apply to the view.\n     * @returns {Object} Returns an object containing the `start` and `end`\n     *  positions of the view.\n     */\n    function getView(start, end, transforms) {\n      var index = -1,\n          length = transforms.length;\n\n      while (++index < length) {\n        var data = transforms[index],\n            size = data.size;\n\n        switch (data.type) {\n          case 'drop':      start += size; break;\n          case 'dropRight': end -= size; break;\n          case 'take':      end = nativeMin(end, start + size); break;\n          case 'takeRight': start = nativeMax(start, end - size); break;\n        }\n      }\n      return { 'start': start, 'end': end };\n    }\n\n    /**\n     * Extracts wrapper details from the `source` body comment.\n     *\n     * @private\n     * @param {string} source The source to inspect.\n     * @returns {Array} Returns the wrapper details.\n     */\n    function getWrapDetails(source) {\n      var match = source.match(reWrapDetails);\n      return match ? match[1].split(reSplitDetails) : [];\n    }\n\n    /**\n     * Checks if `path` exists on `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path to check.\n     * @param {Function} hasFunc The function to check properties.\n     * @returns {boolean} Returns `true` if `path` exists, else `false`.\n     */\n    function hasPath(object, path, hasFunc) {\n      path = castPath(path, object);\n\n      var index = -1,\n          length = path.length,\n          result = false;\n\n      while (++index < length) {\n        var key = toKey(path[index]);\n        if (!(result = object != null && hasFunc(object, key))) {\n          break;\n        }\n        object = object[key];\n      }\n      if (result || ++index != length) {\n        return result;\n      }\n      length = object == null ? 0 : object.length;\n      return !!length && isLength(length) && isIndex(key, length) &&\n        (isArray(object) || isArguments(object));\n    }\n\n    /**\n     * Initializes an array clone.\n     *\n     * @private\n     * @param {Array} array The array to clone.\n     * @returns {Array} Returns the initialized clone.\n     */\n    function initCloneArray(array) {\n      var length = array.length,\n          result = array.constructor(length);\n\n      // Add properties assigned by `RegExp#exec`.\n      if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {\n        result.index = array.index;\n        result.input = array.input;\n      }\n      return result;\n    }\n\n    /**\n     * Initializes an object clone.\n     *\n     * @private\n     * @param {Object} object The object to clone.\n     * @returns {Object} Returns the initialized clone.\n     */\n    function initCloneObject(object) {\n      return (typeof object.constructor == 'function' && !isPrototype(object))\n        ? baseCreate(getPrototype(object))\n        : {};\n    }\n\n    /**\n     * Initializes an object clone based on its `toStringTag`.\n     *\n     * **Note:** This function only supports cloning values with tags of\n     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n     *\n     * @private\n     * @param {Object} object The object to clone.\n     * @param {string} tag The `toStringTag` of the object to clone.\n     * @param {Function} cloneFunc The function to clone values.\n     * @param {boolean} [isDeep] Specify a deep clone.\n     * @returns {Object} Returns the initialized clone.\n     */\n    function initCloneByTag(object, tag, cloneFunc, isDeep) {\n      var Ctor = object.constructor;\n      switch (tag) {\n        case arrayBufferTag:\n          return cloneArrayBuffer(object);\n\n        case boolTag:\n        case dateTag:\n          return new Ctor(+object);\n\n        case dataViewTag:\n          return cloneDataView(object, isDeep);\n\n        case float32Tag: case float64Tag:\n        case int8Tag: case int16Tag: case int32Tag:\n        case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:\n          return cloneTypedArray(object, isDeep);\n\n        case mapTag:\n          return cloneMap(object, isDeep, cloneFunc);\n\n        case numberTag:\n        case stringTag:\n          return new Ctor(object);\n\n        case regexpTag:\n          return cloneRegExp(object);\n\n        case setTag:\n          return cloneSet(object, isDeep, cloneFunc);\n\n        case symbolTag:\n          return cloneSymbol(object);\n      }\n    }\n\n    /**\n     * Inserts wrapper `details` in a comment at the top of the `source` body.\n     *\n     * @private\n     * @param {string} source The source to modify.\n     * @returns {Array} details The details to insert.\n     * @returns {string} Returns the modified source.\n     */\n    function insertWrapDetails(source, details) {\n      var length = details.length;\n      if (!length) {\n        return source;\n      }\n      var lastIndex = length - 1;\n      details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];\n      details = details.join(length > 2 ? ', ' : ' ');\n      return source.replace(reWrapComment, '{\\n/* [wrapped with ' + details + '] */\\n');\n    }\n\n    /**\n     * Checks if `value` is a flattenable `arguments` object or array.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.\n     */\n    function isFlattenable(value) {\n      return isArray(value) || isArguments(value) ||\n        !!(spreadableSymbol && value && value[spreadableSymbol]);\n    }\n\n    /**\n     * Checks if `value` is a valid array-like index.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.\n     * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.\n     */\n    function isIndex(value, length) {\n      length = length == null ? MAX_SAFE_INTEGER : length;\n      return !!length &&\n        (typeof value == 'number' || reIsUint.test(value)) &&\n        (value > -1 && value % 1 == 0 && value < length);\n    }\n\n    /**\n     * Checks if the given arguments are from an iteratee call.\n     *\n     * @private\n     * @param {*} value The potential iteratee value argument.\n     * @param {*} index The potential iteratee index or key argument.\n     * @param {*} object The potential iteratee object argument.\n     * @returns {boolean} Returns `true` if the arguments are from an iteratee call,\n     *  else `false`.\n     */\n    function isIterateeCall(value, index, object) {\n      if (!isObject(object)) {\n        return false;\n      }\n      var type = typeof index;\n      if (type == 'number'\n            ? (isArrayLike(object) && isIndex(index, object.length))\n            : (type == 'string' && index in object)\n          ) {\n        return eq(object[index], value);\n      }\n      return false;\n    }\n\n    /**\n     * Checks if `value` is a property name and not a property path.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @param {Object} [object] The object to query keys on.\n     * @returns {boolean} Returns `true` if `value` is a property name, else `false`.\n     */\n    function isKey(value, object) {\n      if (isArray(value)) {\n        return false;\n      }\n      var type = typeof value;\n      if (type == 'number' || type == 'symbol' || type == 'boolean' ||\n          value == null || isSymbol(value)) {\n        return true;\n      }\n      return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||\n        (object != null && value in Object(object));\n    }\n\n    /**\n     * Checks if `value` is suitable for use as unique object key.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is suitable, else `false`.\n     */\n    function isKeyable(value) {\n      var type = typeof value;\n      return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')\n        ? (value !== '__proto__')\n        : (value === null);\n    }\n\n    /**\n     * Checks if `func` has a lazy counterpart.\n     *\n     * @private\n     * @param {Function} func The function to check.\n     * @returns {boolean} Returns `true` if `func` has a lazy counterpart,\n     *  else `false`.\n     */\n    function isLaziable(func) {\n      var funcName = getFuncName(func),\n          other = lodash[funcName];\n\n      if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {\n        return false;\n      }\n      if (func === other) {\n        return true;\n      }\n      var data = getData(other);\n      return !!data && func === data[0];\n    }\n\n    /**\n     * Checks if `func` has its source masked.\n     *\n     * @private\n     * @param {Function} func The function to check.\n     * @returns {boolean} Returns `true` if `func` is masked, else `false`.\n     */\n    function isMasked(func) {\n      return !!maskSrcKey && (maskSrcKey in func);\n    }\n\n    /**\n     * Checks if `func` is capable of being masked.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `func` is maskable, else `false`.\n     */\n    var isMaskable = coreJsData ? isFunction : stubFalse;\n\n    /**\n     * Checks if `value` is likely a prototype object.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.\n     */\n    function isPrototype(value) {\n      var Ctor = value && value.constructor,\n          proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;\n\n      return value === proto;\n    }\n\n    /**\n     * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.\n     *\n     * @private\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` if suitable for strict\n     *  equality comparisons, else `false`.\n     */\n    function isStrictComparable(value) {\n      return value === value && !isObject(value);\n    }\n\n    /**\n     * A specialized version of `matchesProperty` for source values suitable\n     * for strict equality comparisons, i.e. `===`.\n     *\n     * @private\n     * @param {string} key The key of the property to get.\n     * @param {*} srcValue The value to match.\n     * @returns {Function} Returns the new spec function.\n     */\n    function matchesStrictComparable(key, srcValue) {\n      return function(object) {\n        if (object == null) {\n          return false;\n        }\n        return object[key] === srcValue &&\n          (srcValue !== undefined || (key in Object(object)));\n      };\n    }\n\n    /**\n     * A specialized version of `_.memoize` which clears the memoized function's\n     * cache when it exceeds `MAX_MEMOIZE_SIZE`.\n     *\n     * @private\n     * @param {Function} func The function to have its output memoized.\n     * @returns {Function} Returns the new memoized function.\n     */\n    function memoizeCapped(func) {\n      var result = memoize(func, function(key) {\n        if (cache.size === MAX_MEMOIZE_SIZE) {\n          cache.clear();\n        }\n        return key;\n      });\n\n      var cache = result.cache;\n      return result;\n    }\n\n    /**\n     * Merges the function metadata of `source` into `data`.\n     *\n     * Merging metadata reduces the number of wrappers used to invoke a function.\n     * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`\n     * may be applied regardless of execution order. Methods like `_.ary` and\n     * `_.rearg` modify function arguments, making the order in which they are\n     * executed important, preventing the merging of metadata. However, we make\n     * an exception for a safe combined case where curried functions have `_.ary`\n     * and or `_.rearg` applied.\n     *\n     * @private\n     * @param {Array} data The destination metadata.\n     * @param {Array} source The source metadata.\n     * @returns {Array} Returns `data`.\n     */\n    function mergeData(data, source) {\n      var bitmask = data[1],\n          srcBitmask = source[1],\n          newBitmask = bitmask | srcBitmask,\n          isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);\n\n      var isCombo =\n        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||\n        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||\n        ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));\n\n      // Exit early if metadata can't be merged.\n      if (!(isCommon || isCombo)) {\n        return data;\n      }\n      // Use source `thisArg` if available.\n      if (srcBitmask & WRAP_BIND_FLAG) {\n        data[2] = source[2];\n        // Set when currying a bound function.\n        newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;\n      }\n      // Compose partial arguments.\n      var value = source[3];\n      if (value) {\n        var partials = data[3];\n        data[3] = partials ? composeArgs(partials, value, source[4]) : value;\n        data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];\n      }\n      // Compose partial right arguments.\n      value = source[5];\n      if (value) {\n        partials = data[5];\n        data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;\n        data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];\n      }\n      // Use source `argPos` if available.\n      value = source[7];\n      if (value) {\n        data[7] = value;\n      }\n      // Use source `ary` if it's smaller.\n      if (srcBitmask & WRAP_ARY_FLAG) {\n        data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);\n      }\n      // Use source `arity` if one is not provided.\n      if (data[9] == null) {\n        data[9] = source[9];\n      }\n      // Use source `func` and merge bitmasks.\n      data[0] = source[0];\n      data[1] = newBitmask;\n\n      return data;\n    }\n\n    /**\n     * This function is like\n     * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n     * except that it includes inherited enumerable properties.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property names.\n     */\n    function nativeKeysIn(object) {\n      var result = [];\n      if (object != null) {\n        for (var key in Object(object)) {\n          result.push(key);\n        }\n      }\n      return result;\n    }\n\n    /**\n     * Converts `value` to a string using `Object.prototype.toString`.\n     *\n     * @private\n     * @param {*} value The value to convert.\n     * @returns {string} Returns the converted string.\n     */\n    function objectToString(value) {\n      return nativeObjectToString.call(value);\n    }\n\n    /**\n     * A specialized version of `baseRest` which transforms the rest array.\n     *\n     * @private\n     * @param {Function} func The function to apply a rest parameter to.\n     * @param {number} [start=func.length-1] The start position of the rest parameter.\n     * @param {Function} transform The rest array transform.\n     * @returns {Function} Returns the new function.\n     */\n    function overRest(func, start, transform) {\n      start = nativeMax(start === undefined ? (func.length - 1) : start, 0);\n      return function() {\n        var args = arguments,\n            index = -1,\n            length = nativeMax(args.length - start, 0),\n            array = Array(length);\n\n        while (++index < length) {\n          array[index] = args[start + index];\n        }\n        index = -1;\n        var otherArgs = Array(start + 1);\n        while (++index < start) {\n          otherArgs[index] = args[index];\n        }\n        otherArgs[start] = transform(array);\n        return apply(func, this, otherArgs);\n      };\n    }\n\n    /**\n     * Gets the parent value at `path` of `object`.\n     *\n     * @private\n     * @param {Object} object The object to query.\n     * @param {Array} path The path to get the parent value of.\n     * @returns {*} Returns the parent value.\n     */\n    function parent(object, path) {\n      return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));\n    }\n\n    /**\n     * Reorder `array` according to the specified indexes where the element at\n     * the first index is assigned as the first element, the element at\n     * the second index is assigned as the second element, and so on.\n     *\n     * @private\n     * @param {Array} array The array to reorder.\n     * @param {Array} indexes The arranged array indexes.\n     * @returns {Array} Returns `array`.\n     */\n    function reorder(array, indexes) {\n      var arrLength = array.length,\n          length = nativeMin(indexes.length, arrLength),\n          oldArray = copyArray(array);\n\n      while (length--) {\n        var index = indexes[length];\n        array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;\n      }\n      return array;\n    }\n\n    /**\n     * Sets metadata for `func`.\n     *\n     * **Note:** If this function becomes hot, i.e. is invoked a lot in a short\n     * period of time, it will trip its breaker and transition to an identity\n     * function to avoid garbage collection pauses in V8. See\n     * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)\n     * for more details.\n     *\n     * @private\n     * @param {Function} func The function to associate metadata with.\n     * @param {*} data The metadata.\n     * @returns {Function} Returns `func`.\n     */\n    var setData = shortOut(baseSetData);\n\n    /**\n     * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).\n     *\n     * @private\n     * @param {Function} func The function to delay.\n     * @param {number} wait The number of milliseconds to delay invocation.\n     * @returns {number|Object} Returns the timer id or timeout object.\n     */\n    var setTimeout = ctxSetTimeout || function(func, wait) {\n      return root.setTimeout(func, wait);\n    };\n\n    /**\n     * Sets the `toString` method of `func` to return `string`.\n     *\n     * @private\n     * @param {Function} func The function to modify.\n     * @param {Function} string The `toString` result.\n     * @returns {Function} Returns `func`.\n     */\n    var setToString = shortOut(baseSetToString);\n\n    /**\n     * Sets the `toString` method of `wrapper` to mimic the source of `reference`\n     * with wrapper details in a comment at the top of the source body.\n     *\n     * @private\n     * @param {Function} wrapper The function to modify.\n     * @param {Function} reference The reference function.\n     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n     * @returns {Function} Returns `wrapper`.\n     */\n    function setWrapToString(wrapper, reference, bitmask) {\n      var source = (reference + '');\n      return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));\n    }\n\n    /**\n     * Creates a function that'll short out and invoke `identity` instead\n     * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`\n     * milliseconds.\n     *\n     * @private\n     * @param {Function} func The function to restrict.\n     * @returns {Function} Returns the new shortable function.\n     */\n    function shortOut(func) {\n      var count = 0,\n          lastCalled = 0;\n\n      return function() {\n        var stamp = nativeNow(),\n            remaining = HOT_SPAN - (stamp - lastCalled);\n\n        lastCalled = stamp;\n        if (remaining > 0) {\n          if (++count >= HOT_COUNT) {\n            return arguments[0];\n          }\n        } else {\n          count = 0;\n        }\n        return func.apply(undefined, arguments);\n      };\n    }\n\n    /**\n     * A specialized version of `_.shuffle` which mutates and sets the size of `array`.\n     *\n     * @private\n     * @param {Array} array The array to shuffle.\n     * @param {number} [size=array.length] The size of `array`.\n     * @returns {Array} Returns `array`.\n     */\n    function shuffleSelf(array, size) {\n      var index = -1,\n          length = array.length,\n          lastIndex = length - 1;\n\n      size = size === undefined ? length : size;\n      while (++index < size) {\n        var rand = baseRandom(index, lastIndex),\n            value = array[rand];\n\n        array[rand] = array[index];\n        array[index] = value;\n      }\n      array.length = size;\n      return array;\n    }\n\n    /**\n     * Converts `string` to a property path array.\n     *\n     * @private\n     * @param {string} string The string to convert.\n     * @returns {Array} Returns the property path array.\n     */\n    var stringToPath = memoizeCapped(function(string) {\n      var result = [];\n      if (reLeadingDot.test(string)) {\n        result.push('');\n      }\n      string.replace(rePropName, function(match, number, quote, string) {\n        result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));\n      });\n      return result;\n    });\n\n    /**\n     * Converts `value` to a string key if it's not a string or symbol.\n     *\n     * @private\n     * @param {*} value The value to inspect.\n     * @returns {string|symbol} Returns the key.\n     */\n    function toKey(value) {\n      if (typeof value == 'string' || isSymbol(value)) {\n        return value;\n      }\n      var result = (value + '');\n      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n    }\n\n    /**\n     * Converts `func` to its source code.\n     *\n     * @private\n     * @param {Function} func The function to convert.\n     * @returns {string} Returns the source code.\n     */\n    function toSource(func) {\n      if (func != null) {\n        try {\n          return funcToString.call(func);\n        } catch (e) {}\n        try {\n          return (func + '');\n        } catch (e) {}\n      }\n      return '';\n    }\n\n    /**\n     * Updates wrapper `details` based on `bitmask` flags.\n     *\n     * @private\n     * @returns {Array} details The details to modify.\n     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.\n     * @returns {Array} Returns `details`.\n     */\n    function updateWrapDetails(details, bitmask) {\n      arrayEach(wrapFlags, function(pair) {\n        var value = '_.' + pair[0];\n        if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {\n          details.push(value);\n        }\n      });\n      return details.sort();\n    }\n\n    /**\n     * Creates a clone of `wrapper`.\n     *\n     * @private\n     * @param {Object} wrapper The wrapper to clone.\n     * @returns {Object} Returns the cloned wrapper.\n     */\n    function wrapperClone(wrapper) {\n      if (wrapper instanceof LazyWrapper) {\n        return wrapper.clone();\n      }\n      var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);\n      result.__actions__ = copyArray(wrapper.__actions__);\n      result.__index__  = wrapper.__index__;\n      result.__values__ = wrapper.__values__;\n      return result;\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates an array of elements split into groups the length of `size`.\n     * If `array` can't be split evenly, the final chunk will be the remaining\n     * elements.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to process.\n     * @param {number} [size=1] The length of each chunk\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Array} Returns the new array of chunks.\n     * @example\n     *\n     * _.chunk(['a', 'b', 'c', 'd'], 2);\n     * // => [['a', 'b'], ['c', 'd']]\n     *\n     * _.chunk(['a', 'b', 'c', 'd'], 3);\n     * // => [['a', 'b', 'c'], ['d']]\n     */\n    function chunk(array, size, guard) {\n      if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {\n        size = 1;\n      } else {\n        size = nativeMax(toInteger(size), 0);\n      }\n      var length = array == null ? 0 : array.length;\n      if (!length || size < 1) {\n        return [];\n      }\n      var index = 0,\n          resIndex = 0,\n          result = Array(nativeCeil(length / size));\n\n      while (index < length) {\n        result[resIndex++] = baseSlice(array, index, (index += size));\n      }\n      return result;\n    }\n\n    /**\n     * Creates an array with all falsey values removed. The values `false`, `null`,\n     * `0`, `\"\"`, `undefined`, and `NaN` are falsey.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to compact.\n     * @returns {Array} Returns the new array of filtered values.\n     * @example\n     *\n     * _.compact([0, 1, false, 2, '', 3]);\n     * // => [1, 2, 3]\n     */\n    function compact(array) {\n      var index = -1,\n          length = array == null ? 0 : array.length,\n          resIndex = 0,\n          result = [];\n\n      while (++index < length) {\n        var value = array[index];\n        if (value) {\n          result[resIndex++] = value;\n        }\n      }\n      return result;\n    }\n\n    /**\n     * Creates a new array concatenating `array` with any additional arrays\n     * and/or values.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to concatenate.\n     * @param {...*} [values] The values to concatenate.\n     * @returns {Array} Returns the new concatenated array.\n     * @example\n     *\n     * var array = [1];\n     * var other = _.concat(array, 2, [3], [[4]]);\n     *\n     * console.log(other);\n     * // => [1, 2, 3, [4]]\n     *\n     * console.log(array);\n     * // => [1]\n     */\n    function concat() {\n      var length = arguments.length;\n      if (!length) {\n        return [];\n      }\n      var args = Array(length - 1),\n          array = arguments[0],\n          index = length;\n\n      while (index--) {\n        args[index - 1] = arguments[index];\n      }\n      return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));\n    }\n\n    /**\n     * Creates an array of `array` values not included in the other given arrays\n     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons. The order and references of result values are\n     * determined by the first array.\n     *\n     * **Note:** Unlike `_.pullAll`, this method returns a new array.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {...Array} [values] The values to exclude.\n     * @returns {Array} Returns the new array of filtered values.\n     * @see _.without, _.xor\n     * @example\n     *\n     * _.difference([2, 1], [2, 3]);\n     * // => [1]\n     */\n    var difference = baseRest(function(array, values) {\n      return isArrayLikeObject(array)\n        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))\n        : [];\n    });\n\n    /**\n     * This method is like `_.difference` except that it accepts `iteratee` which\n     * is invoked for each element of `array` and `values` to generate the criterion\n     * by which they're compared. The order and references of result values are\n     * determined by the first array. The iteratee is invoked with one argument:\n     * (value).\n     *\n     * **Note:** Unlike `_.pullAllBy`, this method returns a new array.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {...Array} [values] The values to exclude.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {Array} Returns the new array of filtered values.\n     * @example\n     *\n     * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);\n     * // => [1.2]\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');\n     * // => [{ 'x': 2 }]\n     */\n    var differenceBy = baseRest(function(array, values) {\n      var iteratee = last(values);\n      if (isArrayLikeObject(iteratee)) {\n        iteratee = undefined;\n      }\n      return isArrayLikeObject(array)\n        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))\n        : [];\n    });\n\n    /**\n     * This method is like `_.difference` except that it accepts `comparator`\n     * which is invoked to compare elements of `array` to `values`. The order and\n     * references of result values are determined by the first array. The comparator\n     * is invoked with two arguments: (arrVal, othVal).\n     *\n     * **Note:** Unlike `_.pullAllWith`, this method returns a new array.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {...Array} [values] The values to exclude.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new array of filtered values.\n     * @example\n     *\n     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n     *\n     * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);\n     * // => [{ 'x': 2, 'y': 1 }]\n     */\n    var differenceWith = baseRest(function(array, values) {\n      var comparator = last(values);\n      if (isArrayLikeObject(comparator)) {\n        comparator = undefined;\n      }\n      return isArrayLikeObject(array)\n        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)\n        : [];\n    });\n\n    /**\n     * Creates a slice of `array` with `n` elements dropped from the beginning.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.5.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {number} [n=1] The number of elements to drop.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * _.drop([1, 2, 3]);\n     * // => [2, 3]\n     *\n     * _.drop([1, 2, 3], 2);\n     * // => [3]\n     *\n     * _.drop([1, 2, 3], 5);\n     * // => []\n     *\n     * _.drop([1, 2, 3], 0);\n     * // => [1, 2, 3]\n     */\n    function drop(array, n, guard) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return [];\n      }\n      n = (guard || n === undefined) ? 1 : toInteger(n);\n      return baseSlice(array, n < 0 ? 0 : n, length);\n    }\n\n    /**\n     * Creates a slice of `array` with `n` elements dropped from the end.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {number} [n=1] The number of elements to drop.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * _.dropRight([1, 2, 3]);\n     * // => [1, 2]\n     *\n     * _.dropRight([1, 2, 3], 2);\n     * // => [1]\n     *\n     * _.dropRight([1, 2, 3], 5);\n     * // => []\n     *\n     * _.dropRight([1, 2, 3], 0);\n     * // => [1, 2, 3]\n     */\n    function dropRight(array, n, guard) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return [];\n      }\n      n = (guard || n === undefined) ? 1 : toInteger(n);\n      n = length - n;\n      return baseSlice(array, 0, n < 0 ? 0 : n);\n    }\n\n    /**\n     * Creates a slice of `array` excluding elements dropped from the end.\n     * Elements are dropped until `predicate` returns falsey. The predicate is\n     * invoked with three arguments: (value, index, array).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'active': true },\n     *   { 'user': 'fred',    'active': false },\n     *   { 'user': 'pebbles', 'active': false }\n     * ];\n     *\n     * _.dropRightWhile(users, function(o) { return !o.active; });\n     * // => objects for ['barney']\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });\n     * // => objects for ['barney', 'fred']\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.dropRightWhile(users, ['active', false]);\n     * // => objects for ['barney']\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.dropRightWhile(users, 'active');\n     * // => objects for ['barney', 'fred', 'pebbles']\n     */\n    function dropRightWhile(array, predicate) {\n      return (array && array.length)\n        ? baseWhile(array, getIteratee(predicate, 3), true, true)\n        : [];\n    }\n\n    /**\n     * Creates a slice of `array` excluding elements dropped from the beginning.\n     * Elements are dropped until `predicate` returns falsey. The predicate is\n     * invoked with three arguments: (value, index, array).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'active': false },\n     *   { 'user': 'fred',    'active': false },\n     *   { 'user': 'pebbles', 'active': true }\n     * ];\n     *\n     * _.dropWhile(users, function(o) { return !o.active; });\n     * // => objects for ['pebbles']\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.dropWhile(users, { 'user': 'barney', 'active': false });\n     * // => objects for ['fred', 'pebbles']\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.dropWhile(users, ['active', false]);\n     * // => objects for ['pebbles']\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.dropWhile(users, 'active');\n     * // => objects for ['barney', 'fred', 'pebbles']\n     */\n    function dropWhile(array, predicate) {\n      return (array && array.length)\n        ? baseWhile(array, getIteratee(predicate, 3), true)\n        : [];\n    }\n\n    /**\n     * Fills elements of `array` with `value` from `start` up to, but not\n     * including, `end`.\n     *\n     * **Note:** This method mutates `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.2.0\n     * @category Array\n     * @param {Array} array The array to fill.\n     * @param {*} value The value to fill `array` with.\n     * @param {number} [start=0] The start position.\n     * @param {number} [end=array.length] The end position.\n     * @returns {Array} Returns `array`.\n     * @example\n     *\n     * var array = [1, 2, 3];\n     *\n     * _.fill(array, 'a');\n     * console.log(array);\n     * // => ['a', 'a', 'a']\n     *\n     * _.fill(Array(3), 2);\n     * // => [2, 2, 2]\n     *\n     * _.fill([4, 6, 8, 10], '*', 1, 3);\n     * // => [4, '*', '*', 10]\n     */\n    function fill(array, value, start, end) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return [];\n      }\n      if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {\n        start = 0;\n        end = length;\n      }\n      return baseFill(array, value, start, end);\n    }\n\n    /**\n     * This method is like `_.find` except that it returns the index of the first\n     * element `predicate` returns truthy for instead of the element itself.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.1.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @param {number} [fromIndex=0] The index to search from.\n     * @returns {number} Returns the index of the found element, else `-1`.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'active': false },\n     *   { 'user': 'fred',    'active': false },\n     *   { 'user': 'pebbles', 'active': true }\n     * ];\n     *\n     * _.findIndex(users, function(o) { return o.user == 'barney'; });\n     * // => 0\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.findIndex(users, { 'user': 'fred', 'active': false });\n     * // => 1\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.findIndex(users, ['active', false]);\n     * // => 0\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.findIndex(users, 'active');\n     * // => 2\n     */\n    function findIndex(array, predicate, fromIndex) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return -1;\n      }\n      var index = fromIndex == null ? 0 : toInteger(fromIndex);\n      if (index < 0) {\n        index = nativeMax(length + index, 0);\n      }\n      return baseFindIndex(array, getIteratee(predicate, 3), index);\n    }\n\n    /**\n     * This method is like `_.findIndex` except that it iterates over elements\n     * of `collection` from right to left.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @param {number} [fromIndex=array.length-1] The index to search from.\n     * @returns {number} Returns the index of the found element, else `-1`.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'active': true },\n     *   { 'user': 'fred',    'active': false },\n     *   { 'user': 'pebbles', 'active': false }\n     * ];\n     *\n     * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });\n     * // => 2\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.findLastIndex(users, { 'user': 'barney', 'active': true });\n     * // => 0\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.findLastIndex(users, ['active', false]);\n     * // => 2\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.findLastIndex(users, 'active');\n     * // => 0\n     */\n    function findLastIndex(array, predicate, fromIndex) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return -1;\n      }\n      var index = length - 1;\n      if (fromIndex !== undefined) {\n        index = toInteger(fromIndex);\n        index = fromIndex < 0\n          ? nativeMax(length + index, 0)\n          : nativeMin(index, length - 1);\n      }\n      return baseFindIndex(array, getIteratee(predicate, 3), index, true);\n    }\n\n    /**\n     * Flattens `array` a single level deep.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to flatten.\n     * @returns {Array} Returns the new flattened array.\n     * @example\n     *\n     * _.flatten([1, [2, [3, [4]], 5]]);\n     * // => [1, 2, [3, [4]], 5]\n     */\n    function flatten(array) {\n      var length = array == null ? 0 : array.length;\n      return length ? baseFlatten(array, 1) : [];\n    }\n\n    /**\n     * Recursively flattens `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to flatten.\n     * @returns {Array} Returns the new flattened array.\n     * @example\n     *\n     * _.flattenDeep([1, [2, [3, [4]], 5]]);\n     * // => [1, 2, 3, 4, 5]\n     */\n    function flattenDeep(array) {\n      var length = array == null ? 0 : array.length;\n      return length ? baseFlatten(array, INFINITY) : [];\n    }\n\n    /**\n     * Recursively flatten `array` up to `depth` times.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.4.0\n     * @category Array\n     * @param {Array} array The array to flatten.\n     * @param {number} [depth=1] The maximum recursion depth.\n     * @returns {Array} Returns the new flattened array.\n     * @example\n     *\n     * var array = [1, [2, [3, [4]], 5]];\n     *\n     * _.flattenDepth(array, 1);\n     * // => [1, 2, [3, [4]], 5]\n     *\n     * _.flattenDepth(array, 2);\n     * // => [1, 2, 3, [4], 5]\n     */\n    function flattenDepth(array, depth) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return [];\n      }\n      depth = depth === undefined ? 1 : toInteger(depth);\n      return baseFlatten(array, depth);\n    }\n\n    /**\n     * The inverse of `_.toPairs`; this method returns an object composed\n     * from key-value `pairs`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} pairs The key-value pairs.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * _.fromPairs([['a', 1], ['b', 2]]);\n     * // => { 'a': 1, 'b': 2 }\n     */\n    function fromPairs(pairs) {\n      var index = -1,\n          length = pairs == null ? 0 : pairs.length,\n          result = {};\n\n      while (++index < length) {\n        var pair = pairs[index];\n        result[pair[0]] = pair[1];\n      }\n      return result;\n    }\n\n    /**\n     * Gets the first element of `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @alias first\n     * @category Array\n     * @param {Array} array The array to query.\n     * @returns {*} Returns the first element of `array`.\n     * @example\n     *\n     * _.head([1, 2, 3]);\n     * // => 1\n     *\n     * _.head([]);\n     * // => undefined\n     */\n    function head(array) {\n      return (array && array.length) ? array[0] : undefined;\n    }\n\n    /**\n     * Gets the index at which the first occurrence of `value` is found in `array`\n     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons. If `fromIndex` is negative, it's used as the\n     * offset from the end of `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {*} value The value to search for.\n     * @param {number} [fromIndex=0] The index to search from.\n     * @returns {number} Returns the index of the matched value, else `-1`.\n     * @example\n     *\n     * _.indexOf([1, 2, 1, 2], 2);\n     * // => 1\n     *\n     * // Search from the `fromIndex`.\n     * _.indexOf([1, 2, 1, 2], 2, 2);\n     * // => 3\n     */\n    function indexOf(array, value, fromIndex) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return -1;\n      }\n      var index = fromIndex == null ? 0 : toInteger(fromIndex);\n      if (index < 0) {\n        index = nativeMax(length + index, 0);\n      }\n      return baseIndexOf(array, value, index);\n    }\n\n    /**\n     * Gets all but the last element of `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * _.initial([1, 2, 3]);\n     * // => [1, 2]\n     */\n    function initial(array) {\n      var length = array == null ? 0 : array.length;\n      return length ? baseSlice(array, 0, -1) : [];\n    }\n\n    /**\n     * Creates an array of unique values that are included in all given arrays\n     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons. The order and references of result values are\n     * determined by the first array.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @returns {Array} Returns the new array of intersecting values.\n     * @example\n     *\n     * _.intersection([2, 1], [2, 3]);\n     * // => [2]\n     */\n    var intersection = baseRest(function(arrays) {\n      var mapped = arrayMap(arrays, castArrayLikeObject);\n      return (mapped.length && mapped[0] === arrays[0])\n        ? baseIntersection(mapped)\n        : [];\n    });\n\n    /**\n     * This method is like `_.intersection` except that it accepts `iteratee`\n     * which is invoked for each element of each `arrays` to generate the criterion\n     * by which they're compared. The order and references of result values are\n     * determined by the first array. The iteratee is invoked with one argument:\n     * (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {Array} Returns the new array of intersecting values.\n     * @example\n     *\n     * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);\n     * // => [2.1]\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');\n     * // => [{ 'x': 1 }]\n     */\n    var intersectionBy = baseRest(function(arrays) {\n      var iteratee = last(arrays),\n          mapped = arrayMap(arrays, castArrayLikeObject);\n\n      if (iteratee === last(mapped)) {\n        iteratee = undefined;\n      } else {\n        mapped.pop();\n      }\n      return (mapped.length && mapped[0] === arrays[0])\n        ? baseIntersection(mapped, getIteratee(iteratee, 2))\n        : [];\n    });\n\n    /**\n     * This method is like `_.intersection` except that it accepts `comparator`\n     * which is invoked to compare elements of `arrays`. The order and references\n     * of result values are determined by the first array. The comparator is\n     * invoked with two arguments: (arrVal, othVal).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new array of intersecting values.\n     * @example\n     *\n     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];\n     *\n     * _.intersectionWith(objects, others, _.isEqual);\n     * // => [{ 'x': 1, 'y': 2 }]\n     */\n    var intersectionWith = baseRest(function(arrays) {\n      var comparator = last(arrays),\n          mapped = arrayMap(arrays, castArrayLikeObject);\n\n      comparator = typeof comparator == 'function' ? comparator : undefined;\n      if (comparator) {\n        mapped.pop();\n      }\n      return (mapped.length && mapped[0] === arrays[0])\n        ? baseIntersection(mapped, undefined, comparator)\n        : [];\n    });\n\n    /**\n     * Converts all elements in `array` into a string separated by `separator`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to convert.\n     * @param {string} [separator=','] The element separator.\n     * @returns {string} Returns the joined string.\n     * @example\n     *\n     * _.join(['a', 'b', 'c'], '~');\n     * // => 'a~b~c'\n     */\n    function join(array, separator) {\n      return array == null ? '' : nativeJoin.call(array, separator);\n    }\n\n    /**\n     * Gets the last element of `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @returns {*} Returns the last element of `array`.\n     * @example\n     *\n     * _.last([1, 2, 3]);\n     * // => 3\n     */\n    function last(array) {\n      var length = array == null ? 0 : array.length;\n      return length ? array[length - 1] : undefined;\n    }\n\n    /**\n     * This method is like `_.indexOf` except that it iterates over elements of\n     * `array` from right to left.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {*} value The value to search for.\n     * @param {number} [fromIndex=array.length-1] The index to search from.\n     * @returns {number} Returns the index of the matched value, else `-1`.\n     * @example\n     *\n     * _.lastIndexOf([1, 2, 1, 2], 2);\n     * // => 3\n     *\n     * // Search from the `fromIndex`.\n     * _.lastIndexOf([1, 2, 1, 2], 2, 2);\n     * // => 1\n     */\n    function lastIndexOf(array, value, fromIndex) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return -1;\n      }\n      var index = length;\n      if (fromIndex !== undefined) {\n        index = toInteger(fromIndex);\n        index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);\n      }\n      return value === value\n        ? strictLastIndexOf(array, value, index)\n        : baseFindIndex(array, baseIsNaN, index, true);\n    }\n\n    /**\n     * Gets the element at index `n` of `array`. If `n` is negative, the nth\n     * element from the end is returned.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.11.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {number} [n=0] The index of the element to return.\n     * @returns {*} Returns the nth element of `array`.\n     * @example\n     *\n     * var array = ['a', 'b', 'c', 'd'];\n     *\n     * _.nth(array, 1);\n     * // => 'b'\n     *\n     * _.nth(array, -2);\n     * // => 'c';\n     */\n    function nth(array, n) {\n      return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;\n    }\n\n    /**\n     * Removes all given values from `array` using\n     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons.\n     *\n     * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`\n     * to remove elements from an array by predicate.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Array\n     * @param {Array} array The array to modify.\n     * @param {...*} [values] The values to remove.\n     * @returns {Array} Returns `array`.\n     * @example\n     *\n     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];\n     *\n     * _.pull(array, 'a', 'c');\n     * console.log(array);\n     * // => ['b', 'b']\n     */\n    var pull = baseRest(pullAll);\n\n    /**\n     * This method is like `_.pull` except that it accepts an array of values to remove.\n     *\n     * **Note:** Unlike `_.difference`, this method mutates `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to modify.\n     * @param {Array} values The values to remove.\n     * @returns {Array} Returns `array`.\n     * @example\n     *\n     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];\n     *\n     * _.pullAll(array, ['a', 'c']);\n     * console.log(array);\n     * // => ['b', 'b']\n     */\n    function pullAll(array, values) {\n      return (array && array.length && values && values.length)\n        ? basePullAll(array, values)\n        : array;\n    }\n\n    /**\n     * This method is like `_.pullAll` except that it accepts `iteratee` which is\n     * invoked for each element of `array` and `values` to generate the criterion\n     * by which they're compared. The iteratee is invoked with one argument: (value).\n     *\n     * **Note:** Unlike `_.differenceBy`, this method mutates `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to modify.\n     * @param {Array} values The values to remove.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {Array} Returns `array`.\n     * @example\n     *\n     * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];\n     *\n     * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');\n     * console.log(array);\n     * // => [{ 'x': 2 }]\n     */\n    function pullAllBy(array, values, iteratee) {\n      return (array && array.length && values && values.length)\n        ? basePullAll(array, values, getIteratee(iteratee, 2))\n        : array;\n    }\n\n    /**\n     * This method is like `_.pullAll` except that it accepts `comparator` which\n     * is invoked to compare elements of `array` to `values`. The comparator is\n     * invoked with two arguments: (arrVal, othVal).\n     *\n     * **Note:** Unlike `_.differenceWith`, this method mutates `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.6.0\n     * @category Array\n     * @param {Array} array The array to modify.\n     * @param {Array} values The values to remove.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns `array`.\n     * @example\n     *\n     * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];\n     *\n     * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);\n     * console.log(array);\n     * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]\n     */\n    function pullAllWith(array, values, comparator) {\n      return (array && array.length && values && values.length)\n        ? basePullAll(array, values, undefined, comparator)\n        : array;\n    }\n\n    /**\n     * Removes elements from `array` corresponding to `indexes` and returns an\n     * array of removed elements.\n     *\n     * **Note:** Unlike `_.at`, this method mutates `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to modify.\n     * @param {...(number|number[])} [indexes] The indexes of elements to remove.\n     * @returns {Array} Returns the new array of removed elements.\n     * @example\n     *\n     * var array = ['a', 'b', 'c', 'd'];\n     * var pulled = _.pullAt(array, [1, 3]);\n     *\n     * console.log(array);\n     * // => ['a', 'c']\n     *\n     * console.log(pulled);\n     * // => ['b', 'd']\n     */\n    var pullAt = flatRest(function(array, indexes) {\n      var length = array == null ? 0 : array.length,\n          result = baseAt(array, indexes);\n\n      basePullAt(array, arrayMap(indexes, function(index) {\n        return isIndex(index, length) ? +index : index;\n      }).sort(compareAscending));\n\n      return result;\n    });\n\n    /**\n     * Removes all elements from `array` that `predicate` returns truthy for\n     * and returns an array of the removed elements. The predicate is invoked\n     * with three arguments: (value, index, array).\n     *\n     * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`\n     * to pull elements from an array by value.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Array\n     * @param {Array} array The array to modify.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the new array of removed elements.\n     * @example\n     *\n     * var array = [1, 2, 3, 4];\n     * var evens = _.remove(array, function(n) {\n     *   return n % 2 == 0;\n     * });\n     *\n     * console.log(array);\n     * // => [1, 3]\n     *\n     * console.log(evens);\n     * // => [2, 4]\n     */\n    function remove(array, predicate) {\n      var result = [];\n      if (!(array && array.length)) {\n        return result;\n      }\n      var index = -1,\n          indexes = [],\n          length = array.length;\n\n      predicate = getIteratee(predicate, 3);\n      while (++index < length) {\n        var value = array[index];\n        if (predicate(value, index, array)) {\n          result.push(value);\n          indexes.push(index);\n        }\n      }\n      basePullAt(array, indexes);\n      return result;\n    }\n\n    /**\n     * Reverses `array` so that the first element becomes the last, the second\n     * element becomes the second to last, and so on.\n     *\n     * **Note:** This method mutates `array` and is based on\n     * [`Array#reverse`](https://mdn.io/Array/reverse).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to modify.\n     * @returns {Array} Returns `array`.\n     * @example\n     *\n     * var array = [1, 2, 3];\n     *\n     * _.reverse(array);\n     * // => [3, 2, 1]\n     *\n     * console.log(array);\n     * // => [3, 2, 1]\n     */\n    function reverse(array) {\n      return array == null ? array : nativeReverse.call(array);\n    }\n\n    /**\n     * Creates a slice of `array` from `start` up to, but not including, `end`.\n     *\n     * **Note:** This method is used instead of\n     * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are\n     * returned.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to slice.\n     * @param {number} [start=0] The start position.\n     * @param {number} [end=array.length] The end position.\n     * @returns {Array} Returns the slice of `array`.\n     */\n    function slice(array, start, end) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return [];\n      }\n      if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {\n        start = 0;\n        end = length;\n      }\n      else {\n        start = start == null ? 0 : toInteger(start);\n        end = end === undefined ? length : toInteger(end);\n      }\n      return baseSlice(array, start, end);\n    }\n\n    /**\n     * Uses a binary search to determine the lowest index at which `value`\n     * should be inserted into `array` in order to maintain its sort order.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The sorted array to inspect.\n     * @param {*} value The value to evaluate.\n     * @returns {number} Returns the index at which `value` should be inserted\n     *  into `array`.\n     * @example\n     *\n     * _.sortedIndex([30, 50], 40);\n     * // => 1\n     */\n    function sortedIndex(array, value) {\n      return baseSortedIndex(array, value);\n    }\n\n    /**\n     * This method is like `_.sortedIndex` except that it accepts `iteratee`\n     * which is invoked for `value` and each element of `array` to compute their\n     * sort ranking. The iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The sorted array to inspect.\n     * @param {*} value The value to evaluate.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {number} Returns the index at which `value` should be inserted\n     *  into `array`.\n     * @example\n     *\n     * var objects = [{ 'x': 4 }, { 'x': 5 }];\n     *\n     * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });\n     * // => 0\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.sortedIndexBy(objects, { 'x': 4 }, 'x');\n     * // => 0\n     */\n    function sortedIndexBy(array, value, iteratee) {\n      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));\n    }\n\n    /**\n     * This method is like `_.indexOf` except that it performs a binary\n     * search on a sorted `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {*} value The value to search for.\n     * @returns {number} Returns the index of the matched value, else `-1`.\n     * @example\n     *\n     * _.sortedIndexOf([4, 5, 5, 5, 6], 5);\n     * // => 1\n     */\n    function sortedIndexOf(array, value) {\n      var length = array == null ? 0 : array.length;\n      if (length) {\n        var index = baseSortedIndex(array, value);\n        if (index < length && eq(array[index], value)) {\n          return index;\n        }\n      }\n      return -1;\n    }\n\n    /**\n     * This method is like `_.sortedIndex` except that it returns the highest\n     * index at which `value` should be inserted into `array` in order to\n     * maintain its sort order.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The sorted array to inspect.\n     * @param {*} value The value to evaluate.\n     * @returns {number} Returns the index at which `value` should be inserted\n     *  into `array`.\n     * @example\n     *\n     * _.sortedLastIndex([4, 5, 5, 5, 6], 5);\n     * // => 4\n     */\n    function sortedLastIndex(array, value) {\n      return baseSortedIndex(array, value, true);\n    }\n\n    /**\n     * This method is like `_.sortedLastIndex` except that it accepts `iteratee`\n     * which is invoked for `value` and each element of `array` to compute their\n     * sort ranking. The iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The sorted array to inspect.\n     * @param {*} value The value to evaluate.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {number} Returns the index at which `value` should be inserted\n     *  into `array`.\n     * @example\n     *\n     * var objects = [{ 'x': 4 }, { 'x': 5 }];\n     *\n     * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });\n     * // => 1\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');\n     * // => 1\n     */\n    function sortedLastIndexBy(array, value, iteratee) {\n      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);\n    }\n\n    /**\n     * This method is like `_.lastIndexOf` except that it performs a binary\n     * search on a sorted `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {*} value The value to search for.\n     * @returns {number} Returns the index of the matched value, else `-1`.\n     * @example\n     *\n     * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);\n     * // => 3\n     */\n    function sortedLastIndexOf(array, value) {\n      var length = array == null ? 0 : array.length;\n      if (length) {\n        var index = baseSortedIndex(array, value, true) - 1;\n        if (eq(array[index], value)) {\n          return index;\n        }\n      }\n      return -1;\n    }\n\n    /**\n     * This method is like `_.uniq` except that it's designed and optimized\n     * for sorted arrays.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @returns {Array} Returns the new duplicate free array.\n     * @example\n     *\n     * _.sortedUniq([1, 1, 2]);\n     * // => [1, 2]\n     */\n    function sortedUniq(array) {\n      return (array && array.length)\n        ? baseSortedUniq(array)\n        : [];\n    }\n\n    /**\n     * This method is like `_.uniqBy` except that it's designed and optimized\n     * for sorted arrays.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {Function} [iteratee] The iteratee invoked per element.\n     * @returns {Array} Returns the new duplicate free array.\n     * @example\n     *\n     * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);\n     * // => [1.1, 2.3]\n     */\n    function sortedUniqBy(array, iteratee) {\n      return (array && array.length)\n        ? baseSortedUniq(array, getIteratee(iteratee, 2))\n        : [];\n    }\n\n    /**\n     * Gets all but the first element of `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * _.tail([1, 2, 3]);\n     * // => [2, 3]\n     */\n    function tail(array) {\n      var length = array == null ? 0 : array.length;\n      return length ? baseSlice(array, 1, length) : [];\n    }\n\n    /**\n     * Creates a slice of `array` with `n` elements taken from the beginning.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {number} [n=1] The number of elements to take.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * _.take([1, 2, 3]);\n     * // => [1]\n     *\n     * _.take([1, 2, 3], 2);\n     * // => [1, 2]\n     *\n     * _.take([1, 2, 3], 5);\n     * // => [1, 2, 3]\n     *\n     * _.take([1, 2, 3], 0);\n     * // => []\n     */\n    function take(array, n, guard) {\n      if (!(array && array.length)) {\n        return [];\n      }\n      n = (guard || n === undefined) ? 1 : toInteger(n);\n      return baseSlice(array, 0, n < 0 ? 0 : n);\n    }\n\n    /**\n     * Creates a slice of `array` with `n` elements taken from the end.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {number} [n=1] The number of elements to take.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * _.takeRight([1, 2, 3]);\n     * // => [3]\n     *\n     * _.takeRight([1, 2, 3], 2);\n     * // => [2, 3]\n     *\n     * _.takeRight([1, 2, 3], 5);\n     * // => [1, 2, 3]\n     *\n     * _.takeRight([1, 2, 3], 0);\n     * // => []\n     */\n    function takeRight(array, n, guard) {\n      var length = array == null ? 0 : array.length;\n      if (!length) {\n        return [];\n      }\n      n = (guard || n === undefined) ? 1 : toInteger(n);\n      n = length - n;\n      return baseSlice(array, n < 0 ? 0 : n, length);\n    }\n\n    /**\n     * Creates a slice of `array` with elements taken from the end. Elements are\n     * taken until `predicate` returns falsey. The predicate is invoked with\n     * three arguments: (value, index, array).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'active': true },\n     *   { 'user': 'fred',    'active': false },\n     *   { 'user': 'pebbles', 'active': false }\n     * ];\n     *\n     * _.takeRightWhile(users, function(o) { return !o.active; });\n     * // => objects for ['fred', 'pebbles']\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });\n     * // => objects for ['pebbles']\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.takeRightWhile(users, ['active', false]);\n     * // => objects for ['fred', 'pebbles']\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.takeRightWhile(users, 'active');\n     * // => []\n     */\n    function takeRightWhile(array, predicate) {\n      return (array && array.length)\n        ? baseWhile(array, getIteratee(predicate, 3), false, true)\n        : [];\n    }\n\n    /**\n     * Creates a slice of `array` with elements taken from the beginning. Elements\n     * are taken until `predicate` returns falsey. The predicate is invoked with\n     * three arguments: (value, index, array).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Array\n     * @param {Array} array The array to query.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the slice of `array`.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'active': false },\n     *   { 'user': 'fred',    'active': false },\n     *   { 'user': 'pebbles', 'active': true }\n     * ];\n     *\n     * _.takeWhile(users, function(o) { return !o.active; });\n     * // => objects for ['barney', 'fred']\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.takeWhile(users, { 'user': 'barney', 'active': false });\n     * // => objects for ['barney']\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.takeWhile(users, ['active', false]);\n     * // => objects for ['barney', 'fred']\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.takeWhile(users, 'active');\n     * // => []\n     */\n    function takeWhile(array, predicate) {\n      return (array && array.length)\n        ? baseWhile(array, getIteratee(predicate, 3))\n        : [];\n    }\n\n    /**\n     * Creates an array of unique values, in order, from all given arrays using\n     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @returns {Array} Returns the new array of combined values.\n     * @example\n     *\n     * _.union([2], [1, 2]);\n     * // => [2, 1]\n     */\n    var union = baseRest(function(arrays) {\n      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));\n    });\n\n    /**\n     * This method is like `_.union` except that it accepts `iteratee` which is\n     * invoked for each element of each `arrays` to generate the criterion by\n     * which uniqueness is computed. Result values are chosen from the first\n     * array in which the value occurs. The iteratee is invoked with one argument:\n     * (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {Array} Returns the new array of combined values.\n     * @example\n     *\n     * _.unionBy([2.1], [1.2, 2.3], Math.floor);\n     * // => [2.1, 1.2]\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');\n     * // => [{ 'x': 1 }, { 'x': 2 }]\n     */\n    var unionBy = baseRest(function(arrays) {\n      var iteratee = last(arrays);\n      if (isArrayLikeObject(iteratee)) {\n        iteratee = undefined;\n      }\n      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));\n    });\n\n    /**\n     * This method is like `_.union` except that it accepts `comparator` which\n     * is invoked to compare elements of `arrays`. Result values are chosen from\n     * the first array in which the value occurs. The comparator is invoked\n     * with two arguments: (arrVal, othVal).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new array of combined values.\n     * @example\n     *\n     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];\n     *\n     * _.unionWith(objects, others, _.isEqual);\n     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]\n     */\n    var unionWith = baseRest(function(arrays) {\n      var comparator = last(arrays);\n      comparator = typeof comparator == 'function' ? comparator : undefined;\n      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);\n    });\n\n    /**\n     * Creates a duplicate-free version of an array, using\n     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons, in which only the first occurrence of each element\n     * is kept. The order of result values is determined by the order they occur\n     * in the array.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @returns {Array} Returns the new duplicate free array.\n     * @example\n     *\n     * _.uniq([2, 1, 2]);\n     * // => [2, 1]\n     */\n    function uniq(array) {\n      return (array && array.length) ? baseUniq(array) : [];\n    }\n\n    /**\n     * This method is like `_.uniq` except that it accepts `iteratee` which is\n     * invoked for each element in `array` to generate the criterion by which\n     * uniqueness is computed. The order of result values is determined by the\n     * order they occur in the array. The iteratee is invoked with one argument:\n     * (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {Array} Returns the new duplicate free array.\n     * @example\n     *\n     * _.uniqBy([2.1, 1.2, 2.3], Math.floor);\n     * // => [2.1, 1.2]\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');\n     * // => [{ 'x': 1 }, { 'x': 2 }]\n     */\n    function uniqBy(array, iteratee) {\n      return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];\n    }\n\n    /**\n     * This method is like `_.uniq` except that it accepts `comparator` which\n     * is invoked to compare elements of `array`. The order of result values is\n     * determined by the order they occur in the array.The comparator is invoked\n     * with two arguments: (arrVal, othVal).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new duplicate free array.\n     * @example\n     *\n     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];\n     *\n     * _.uniqWith(objects, _.isEqual);\n     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]\n     */\n    function uniqWith(array, comparator) {\n      comparator = typeof comparator == 'function' ? comparator : undefined;\n      return (array && array.length) ? baseUniq(array, undefined, comparator) : [];\n    }\n\n    /**\n     * This method is like `_.zip` except that it accepts an array of grouped\n     * elements and creates an array regrouping the elements to their pre-zip\n     * configuration.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.2.0\n     * @category Array\n     * @param {Array} array The array of grouped elements to process.\n     * @returns {Array} Returns the new array of regrouped elements.\n     * @example\n     *\n     * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);\n     * // => [['a', 1, true], ['b', 2, false]]\n     *\n     * _.unzip(zipped);\n     * // => [['a', 'b'], [1, 2], [true, false]]\n     */\n    function unzip(array) {\n      if (!(array && array.length)) {\n        return [];\n      }\n      var length = 0;\n      array = arrayFilter(array, function(group) {\n        if (isArrayLikeObject(group)) {\n          length = nativeMax(group.length, length);\n          return true;\n        }\n      });\n      return baseTimes(length, function(index) {\n        return arrayMap(array, baseProperty(index));\n      });\n    }\n\n    /**\n     * This method is like `_.unzip` except that it accepts `iteratee` to specify\n     * how regrouped values should be combined. The iteratee is invoked with the\n     * elements of each group: (...group).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.8.0\n     * @category Array\n     * @param {Array} array The array of grouped elements to process.\n     * @param {Function} [iteratee=_.identity] The function to combine\n     *  regrouped values.\n     * @returns {Array} Returns the new array of regrouped elements.\n     * @example\n     *\n     * var zipped = _.zip([1, 2], [10, 20], [100, 200]);\n     * // => [[1, 10, 100], [2, 20, 200]]\n     *\n     * _.unzipWith(zipped, _.add);\n     * // => [3, 30, 300]\n     */\n    function unzipWith(array, iteratee) {\n      if (!(array && array.length)) {\n        return [];\n      }\n      var result = unzip(array);\n      if (iteratee == null) {\n        return result;\n      }\n      return arrayMap(result, function(group) {\n        return apply(iteratee, undefined, group);\n      });\n    }\n\n    /**\n     * Creates an array excluding all given values using\n     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * for equality comparisons.\n     *\n     * **Note:** Unlike `_.pull`, this method returns a new array.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {Array} array The array to inspect.\n     * @param {...*} [values] The values to exclude.\n     * @returns {Array} Returns the new array of filtered values.\n     * @see _.difference, _.xor\n     * @example\n     *\n     * _.without([2, 1, 2, 3], 1, 2);\n     * // => [3]\n     */\n    var without = baseRest(function(array, values) {\n      return isArrayLikeObject(array)\n        ? baseDifference(array, values)\n        : [];\n    });\n\n    /**\n     * Creates an array of unique values that is the\n     * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)\n     * of the given arrays. The order of result values is determined by the order\n     * they occur in the arrays.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.4.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @returns {Array} Returns the new array of filtered values.\n     * @see _.difference, _.without\n     * @example\n     *\n     * _.xor([2, 1], [2, 3]);\n     * // => [1, 3]\n     */\n    var xor = baseRest(function(arrays) {\n      return baseXor(arrayFilter(arrays, isArrayLikeObject));\n    });\n\n    /**\n     * This method is like `_.xor` except that it accepts `iteratee` which is\n     * invoked for each element of each `arrays` to generate the criterion by\n     * which by which they're compared. The order of result values is determined\n     * by the order they occur in the arrays. The iteratee is invoked with one\n     * argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {Array} Returns the new array of filtered values.\n     * @example\n     *\n     * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);\n     * // => [1.2, 3.4]\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');\n     * // => [{ 'x': 2 }]\n     */\n    var xorBy = baseRest(function(arrays) {\n      var iteratee = last(arrays);\n      if (isArrayLikeObject(iteratee)) {\n        iteratee = undefined;\n      }\n      return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));\n    });\n\n    /**\n     * This method is like `_.xor` except that it accepts `comparator` which is\n     * invoked to compare elements of `arrays`. The order of result values is\n     * determined by the order they occur in the arrays. The comparator is invoked\n     * with two arguments: (arrVal, othVal).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to inspect.\n     * @param {Function} [comparator] The comparator invoked per element.\n     * @returns {Array} Returns the new array of filtered values.\n     * @example\n     *\n     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];\n     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];\n     *\n     * _.xorWith(objects, others, _.isEqual);\n     * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]\n     */\n    var xorWith = baseRest(function(arrays) {\n      var comparator = last(arrays);\n      comparator = typeof comparator == 'function' ? comparator : undefined;\n      return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);\n    });\n\n    /**\n     * Creates an array of grouped elements, the first of which contains the\n     * first elements of the given arrays, the second of which contains the\n     * second elements of the given arrays, and so on.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to process.\n     * @returns {Array} Returns the new array of grouped elements.\n     * @example\n     *\n     * _.zip(['a', 'b'], [1, 2], [true, false]);\n     * // => [['a', 1, true], ['b', 2, false]]\n     */\n    var zip = baseRest(unzip);\n\n    /**\n     * This method is like `_.fromPairs` except that it accepts two arrays,\n     * one of property identifiers and one of corresponding values.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.4.0\n     * @category Array\n     * @param {Array} [props=[]] The property identifiers.\n     * @param {Array} [values=[]] The property values.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * _.zipObject(['a', 'b'], [1, 2]);\n     * // => { 'a': 1, 'b': 2 }\n     */\n    function zipObject(props, values) {\n      return baseZipObject(props || [], values || [], assignValue);\n    }\n\n    /**\n     * This method is like `_.zipObject` except that it supports property paths.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.1.0\n     * @category Array\n     * @param {Array} [props=[]] The property identifiers.\n     * @param {Array} [values=[]] The property values.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);\n     * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }\n     */\n    function zipObjectDeep(props, values) {\n      return baseZipObject(props || [], values || [], baseSet);\n    }\n\n    /**\n     * This method is like `_.zip` except that it accepts `iteratee` to specify\n     * how grouped values should be combined. The iteratee is invoked with the\n     * elements of each group: (...group).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.8.0\n     * @category Array\n     * @param {...Array} [arrays] The arrays to process.\n     * @param {Function} [iteratee=_.identity] The function to combine\n     *  grouped values.\n     * @returns {Array} Returns the new array of grouped elements.\n     * @example\n     *\n     * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {\n     *   return a + b + c;\n     * });\n     * // => [111, 222]\n     */\n    var zipWith = baseRest(function(arrays) {\n      var length = arrays.length,\n          iteratee = length > 1 ? arrays[length - 1] : undefined;\n\n      iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;\n      return unzipWith(arrays, iteratee);\n    });\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates a `lodash` wrapper instance that wraps `value` with explicit method\n     * chain sequences enabled. The result of such sequences must be unwrapped\n     * with `_#value`.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.3.0\n     * @category Seq\n     * @param {*} value The value to wrap.\n     * @returns {Object} Returns the new `lodash` wrapper instance.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'age': 36 },\n     *   { 'user': 'fred',    'age': 40 },\n     *   { 'user': 'pebbles', 'age': 1 }\n     * ];\n     *\n     * var youngest = _\n     *   .chain(users)\n     *   .sortBy('age')\n     *   .map(function(o) {\n     *     return o.user + ' is ' + o.age;\n     *   })\n     *   .head()\n     *   .value();\n     * // => 'pebbles is 1'\n     */\n    function chain(value) {\n      var result = lodash(value);\n      result.__chain__ = true;\n      return result;\n    }\n\n    /**\n     * This method invokes `interceptor` and returns `value`. The interceptor\n     * is invoked with one argument; (value). The purpose of this method is to\n     * \"tap into\" a method chain sequence in order to modify intermediate results.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Seq\n     * @param {*} value The value to provide to `interceptor`.\n     * @param {Function} interceptor The function to invoke.\n     * @returns {*} Returns `value`.\n     * @example\n     *\n     * _([1, 2, 3])\n     *  .tap(function(array) {\n     *    // Mutate input array.\n     *    array.pop();\n     *  })\n     *  .reverse()\n     *  .value();\n     * // => [2, 1]\n     */\n    function tap(value, interceptor) {\n      interceptor(value);\n      return value;\n    }\n\n    /**\n     * This method is like `_.tap` except that it returns the result of `interceptor`.\n     * The purpose of this method is to \"pass thru\" values replacing intermediate\n     * results in a method chain sequence.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Seq\n     * @param {*} value The value to provide to `interceptor`.\n     * @param {Function} interceptor The function to invoke.\n     * @returns {*} Returns the result of `interceptor`.\n     * @example\n     *\n     * _('  abc  ')\n     *  .chain()\n     *  .trim()\n     *  .thru(function(value) {\n     *    return [value];\n     *  })\n     *  .value();\n     * // => ['abc']\n     */\n    function thru(value, interceptor) {\n      return interceptor(value);\n    }\n\n    /**\n     * This method is the wrapper version of `_.at`.\n     *\n     * @name at\n     * @memberOf _\n     * @since 1.0.0\n     * @category Seq\n     * @param {...(string|string[])} [paths] The property paths to pick.\n     * @returns {Object} Returns the new `lodash` wrapper instance.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };\n     *\n     * _(object).at(['a[0].b.c', 'a[1]']).value();\n     * // => [3, 4]\n     */\n    var wrapperAt = flatRest(function(paths) {\n      var length = paths.length,\n          start = length ? paths[0] : 0,\n          value = this.__wrapped__,\n          interceptor = function(object) { return baseAt(object, paths); };\n\n      if (length > 1 || this.__actions__.length ||\n          !(value instanceof LazyWrapper) || !isIndex(start)) {\n        return this.thru(interceptor);\n      }\n      value = value.slice(start, +start + (length ? 1 : 0));\n      value.__actions__.push({\n        'func': thru,\n        'args': [interceptor],\n        'thisArg': undefined\n      });\n      return new LodashWrapper(value, this.__chain__).thru(function(array) {\n        if (length && !array.length) {\n          array.push(undefined);\n        }\n        return array;\n      });\n    });\n\n    /**\n     * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.\n     *\n     * @name chain\n     * @memberOf _\n     * @since 0.1.0\n     * @category Seq\n     * @returns {Object} Returns the new `lodash` wrapper instance.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney', 'age': 36 },\n     *   { 'user': 'fred',   'age': 40 }\n     * ];\n     *\n     * // A sequence without explicit chaining.\n     * _(users).head();\n     * // => { 'user': 'barney', 'age': 36 }\n     *\n     * // A sequence with explicit chaining.\n     * _(users)\n     *   .chain()\n     *   .head()\n     *   .pick('user')\n     *   .value();\n     * // => { 'user': 'barney' }\n     */\n    function wrapperChain() {\n      return chain(this);\n    }\n\n    /**\n     * Executes the chain sequence and returns the wrapped result.\n     *\n     * @name commit\n     * @memberOf _\n     * @since 3.2.0\n     * @category Seq\n     * @returns {Object} Returns the new `lodash` wrapper instance.\n     * @example\n     *\n     * var array = [1, 2];\n     * var wrapped = _(array).push(3);\n     *\n     * console.log(array);\n     * // => [1, 2]\n     *\n     * wrapped = wrapped.commit();\n     * console.log(array);\n     * // => [1, 2, 3]\n     *\n     * wrapped.last();\n     * // => 3\n     *\n     * console.log(array);\n     * // => [1, 2, 3]\n     */\n    function wrapperCommit() {\n      return new LodashWrapper(this.value(), this.__chain__);\n    }\n\n    /**\n     * Gets the next value on a wrapped object following the\n     * [iterator protocol](https://mdn.io/iteration_protocols#iterator).\n     *\n     * @name next\n     * @memberOf _\n     * @since 4.0.0\n     * @category Seq\n     * @returns {Object} Returns the next iterator value.\n     * @example\n     *\n     * var wrapped = _([1, 2]);\n     *\n     * wrapped.next();\n     * // => { 'done': false, 'value': 1 }\n     *\n     * wrapped.next();\n     * // => { 'done': false, 'value': 2 }\n     *\n     * wrapped.next();\n     * // => { 'done': true, 'value': undefined }\n     */\n    function wrapperNext() {\n      if (this.__values__ === undefined) {\n        this.__values__ = toArray(this.value());\n      }\n      var done = this.__index__ >= this.__values__.length,\n          value = done ? undefined : this.__values__[this.__index__++];\n\n      return { 'done': done, 'value': value };\n    }\n\n    /**\n     * Enables the wrapper to be iterable.\n     *\n     * @name Symbol.iterator\n     * @memberOf _\n     * @since 4.0.0\n     * @category Seq\n     * @returns {Object} Returns the wrapper object.\n     * @example\n     *\n     * var wrapped = _([1, 2]);\n     *\n     * wrapped[Symbol.iterator]() === wrapped;\n     * // => true\n     *\n     * Array.from(wrapped);\n     * // => [1, 2]\n     */\n    function wrapperToIterator() {\n      return this;\n    }\n\n    /**\n     * Creates a clone of the chain sequence planting `value` as the wrapped value.\n     *\n     * @name plant\n     * @memberOf _\n     * @since 3.2.0\n     * @category Seq\n     * @param {*} value The value to plant.\n     * @returns {Object} Returns the new `lodash` wrapper instance.\n     * @example\n     *\n     * function square(n) {\n     *   return n * n;\n     * }\n     *\n     * var wrapped = _([1, 2]).map(square);\n     * var other = wrapped.plant([3, 4]);\n     *\n     * other.value();\n     * // => [9, 16]\n     *\n     * wrapped.value();\n     * // => [1, 4]\n     */\n    function wrapperPlant(value) {\n      var result,\n          parent = this;\n\n      while (parent instanceof baseLodash) {\n        var clone = wrapperClone(parent);\n        clone.__index__ = 0;\n        clone.__values__ = undefined;\n        if (result) {\n          previous.__wrapped__ = clone;\n        } else {\n          result = clone;\n        }\n        var previous = clone;\n        parent = parent.__wrapped__;\n      }\n      previous.__wrapped__ = value;\n      return result;\n    }\n\n    /**\n     * This method is the wrapper version of `_.reverse`.\n     *\n     * **Note:** This method mutates the wrapped array.\n     *\n     * @name reverse\n     * @memberOf _\n     * @since 0.1.0\n     * @category Seq\n     * @returns {Object} Returns the new `lodash` wrapper instance.\n     * @example\n     *\n     * var array = [1, 2, 3];\n     *\n     * _(array).reverse().value()\n     * // => [3, 2, 1]\n     *\n     * console.log(array);\n     * // => [3, 2, 1]\n     */\n    function wrapperReverse() {\n      var value = this.__wrapped__;\n      if (value instanceof LazyWrapper) {\n        var wrapped = value;\n        if (this.__actions__.length) {\n          wrapped = new LazyWrapper(this);\n        }\n        wrapped = wrapped.reverse();\n        wrapped.__actions__.push({\n          'func': thru,\n          'args': [reverse],\n          'thisArg': undefined\n        });\n        return new LodashWrapper(wrapped, this.__chain__);\n      }\n      return this.thru(reverse);\n    }\n\n    /**\n     * Executes the chain sequence to resolve the unwrapped value.\n     *\n     * @name value\n     * @memberOf _\n     * @since 0.1.0\n     * @alias toJSON, valueOf\n     * @category Seq\n     * @returns {*} Returns the resolved unwrapped value.\n     * @example\n     *\n     * _([1, 2, 3]).value();\n     * // => [1, 2, 3]\n     */\n    function wrapperValue() {\n      return baseWrapperValue(this.__wrapped__, this.__actions__);\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Creates an object composed of keys generated from the results of running\n     * each element of `collection` thru `iteratee`. The corresponding value of\n     * each key is the number of times the key was returned by `iteratee`. The\n     * iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.5.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.\n     * @returns {Object} Returns the composed aggregate object.\n     * @example\n     *\n     * _.countBy([6.1, 4.2, 6.3], Math.floor);\n     * // => { '4': 1, '6': 2 }\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.countBy(['one', 'two', 'three'], 'length');\n     * // => { '3': 2, '5': 1 }\n     */\n    var countBy = createAggregator(function(result, value, key) {\n      if (hasOwnProperty.call(result, key)) {\n        ++result[key];\n      } else {\n        baseAssignValue(result, key, 1);\n      }\n    });\n\n    /**\n     * Checks if `predicate` returns truthy for **all** elements of `collection`.\n     * Iteration is stopped once `predicate` returns falsey. The predicate is\n     * invoked with three arguments: (value, index|key, collection).\n     *\n     * **Note:** This method returns `true` for\n     * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because\n     * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of\n     * elements of empty collections.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {boolean} Returns `true` if all elements pass the predicate check,\n     *  else `false`.\n     * @example\n     *\n     * _.every([true, 1, null, 'yes'], Boolean);\n     * // => false\n     *\n     * var users = [\n     *   { 'user': 'barney', 'age': 36, 'active': false },\n     *   { 'user': 'fred',   'age': 40, 'active': false }\n     * ];\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.every(users, { 'user': 'barney', 'active': false });\n     * // => false\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.every(users, ['active', false]);\n     * // => true\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.every(users, 'active');\n     * // => false\n     */\n    function every(collection, predicate, guard) {\n      var func = isArray(collection) ? arrayEvery : baseEvery;\n      if (guard && isIterateeCall(collection, predicate, guard)) {\n        predicate = undefined;\n      }\n      return func(collection, getIteratee(predicate, 3));\n    }\n\n    /**\n     * Iterates over elements of `collection`, returning an array of all elements\n     * `predicate` returns truthy for. The predicate is invoked with three\n     * arguments: (value, index|key, collection).\n     *\n     * **Note:** Unlike `_.remove`, this method returns a new array.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the new filtered array.\n     * @see _.reject\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney', 'age': 36, 'active': true },\n     *   { 'user': 'fred',   'age': 40, 'active': false }\n     * ];\n     *\n     * _.filter(users, function(o) { return !o.active; });\n     * // => objects for ['fred']\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.filter(users, { 'age': 36, 'active': true });\n     * // => objects for ['barney']\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.filter(users, ['active', false]);\n     * // => objects for ['fred']\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.filter(users, 'active');\n     * // => objects for ['barney']\n     */\n    function filter(collection, predicate) {\n      var func = isArray(collection) ? arrayFilter : baseFilter;\n      return func(collection, getIteratee(predicate, 3));\n    }\n\n    /**\n     * Iterates over elements of `collection`, returning the first element\n     * `predicate` returns truthy for. The predicate is invoked with three\n     * arguments: (value, index|key, collection).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to inspect.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @param {number} [fromIndex=0] The index to search from.\n     * @returns {*} Returns the matched element, else `undefined`.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'age': 36, 'active': true },\n     *   { 'user': 'fred',    'age': 40, 'active': false },\n     *   { 'user': 'pebbles', 'age': 1,  'active': true }\n     * ];\n     *\n     * _.find(users, function(o) { return o.age < 40; });\n     * // => object for 'barney'\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.find(users, { 'age': 1, 'active': true });\n     * // => object for 'pebbles'\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.find(users, ['active', false]);\n     * // => object for 'fred'\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.find(users, 'active');\n     * // => object for 'barney'\n     */\n    var find = createFind(findIndex);\n\n    /**\n     * This method is like `_.find` except that it iterates over elements of\n     * `collection` from right to left.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to inspect.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @param {number} [fromIndex=collection.length-1] The index to search from.\n     * @returns {*} Returns the matched element, else `undefined`.\n     * @example\n     *\n     * _.findLast([1, 2, 3, 4], function(n) {\n     *   return n % 2 == 1;\n     * });\n     * // => 3\n     */\n    var findLast = createFind(findLastIndex);\n\n    /**\n     * Creates a flattened array of values by running each element in `collection`\n     * thru `iteratee` and flattening the mapped results. The iteratee is invoked\n     * with three arguments: (value, index|key, collection).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the new flattened array.\n     * @example\n     *\n     * function duplicate(n) {\n     *   return [n, n];\n     * }\n     *\n     * _.flatMap([1, 2], duplicate);\n     * // => [1, 1, 2, 2]\n     */\n    function flatMap(collection, iteratee) {\n      return baseFlatten(map(collection, iteratee), 1);\n    }\n\n    /**\n     * This method is like `_.flatMap` except that it recursively flattens the\n     * mapped results.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.7.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the new flattened array.\n     * @example\n     *\n     * function duplicate(n) {\n     *   return [[[n, n]]];\n     * }\n     *\n     * _.flatMapDeep([1, 2], duplicate);\n     * // => [1, 1, 2, 2]\n     */\n    function flatMapDeep(collection, iteratee) {\n      return baseFlatten(map(collection, iteratee), INFINITY);\n    }\n\n    /**\n     * This method is like `_.flatMap` except that it recursively flattens the\n     * mapped results up to `depth` times.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.7.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @param {number} [depth=1] The maximum recursion depth.\n     * @returns {Array} Returns the new flattened array.\n     * @example\n     *\n     * function duplicate(n) {\n     *   return [[[n, n]]];\n     * }\n     *\n     * _.flatMapDepth([1, 2], duplicate, 2);\n     * // => [[1, 1], [2, 2]]\n     */\n    function flatMapDepth(collection, iteratee, depth) {\n      depth = depth === undefined ? 1 : toInteger(depth);\n      return baseFlatten(map(collection, iteratee), depth);\n    }\n\n    /**\n     * Iterates over elements of `collection` and invokes `iteratee` for each element.\n     * The iteratee is invoked with three arguments: (value, index|key, collection).\n     * Iteratee functions may exit iteration early by explicitly returning `false`.\n     *\n     * **Note:** As with other \"Collections\" methods, objects with a \"length\"\n     * property are iterated like arrays. To avoid this behavior use `_.forIn`\n     * or `_.forOwn` for object iteration.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @alias each\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Array|Object} Returns `collection`.\n     * @see _.forEachRight\n     * @example\n     *\n     * _.forEach([1, 2], function(value) {\n     *   console.log(value);\n     * });\n     * // => Logs `1` then `2`.\n     *\n     * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {\n     *   console.log(key);\n     * });\n     * // => Logs 'a' then 'b' (iteration order is not guaranteed).\n     */\n    function forEach(collection, iteratee) {\n      var func = isArray(collection) ? arrayEach : baseEach;\n      return func(collection, getIteratee(iteratee, 3));\n    }\n\n    /**\n     * This method is like `_.forEach` except that it iterates over elements of\n     * `collection` from right to left.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @alias eachRight\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Array|Object} Returns `collection`.\n     * @see _.forEach\n     * @example\n     *\n     * _.forEachRight([1, 2], function(value) {\n     *   console.log(value);\n     * });\n     * // => Logs `2` then `1`.\n     */\n    function forEachRight(collection, iteratee) {\n      var func = isArray(collection) ? arrayEachRight : baseEachRight;\n      return func(collection, getIteratee(iteratee, 3));\n    }\n\n    /**\n     * Creates an object composed of keys generated from the results of running\n     * each element of `collection` thru `iteratee`. The order of grouped values\n     * is determined by the order they occur in `collection`. The corresponding\n     * value of each key is an array of elements responsible for generating the\n     * key. The iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.\n     * @returns {Object} Returns the composed aggregate object.\n     * @example\n     *\n     * _.groupBy([6.1, 4.2, 6.3], Math.floor);\n     * // => { '4': [4.2], '6': [6.1, 6.3] }\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.groupBy(['one', 'two', 'three'], 'length');\n     * // => { '3': ['one', 'two'], '5': ['three'] }\n     */\n    var groupBy = createAggregator(function(result, value, key) {\n      if (hasOwnProperty.call(result, key)) {\n        result[key].push(value);\n      } else {\n        baseAssignValue(result, key, [value]);\n      }\n    });\n\n    /**\n     * Checks if `value` is in `collection`. If `collection` is a string, it's\n     * checked for a substring of `value`, otherwise\n     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * is used for equality comparisons. If `fromIndex` is negative, it's used as\n     * the offset from the end of `collection`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object|string} collection The collection to inspect.\n     * @param {*} value The value to search for.\n     * @param {number} [fromIndex=0] The index to search from.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.\n     * @returns {boolean} Returns `true` if `value` is found, else `false`.\n     * @example\n     *\n     * _.includes([1, 2, 3], 1);\n     * // => true\n     *\n     * _.includes([1, 2, 3], 1, 2);\n     * // => false\n     *\n     * _.includes({ 'a': 1, 'b': 2 }, 1);\n     * // => true\n     *\n     * _.includes('abcd', 'bc');\n     * // => true\n     */\n    function includes(collection, value, fromIndex, guard) {\n      collection = isArrayLike(collection) ? collection : values(collection);\n      fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;\n\n      var length = collection.length;\n      if (fromIndex < 0) {\n        fromIndex = nativeMax(length + fromIndex, 0);\n      }\n      return isString(collection)\n        ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)\n        : (!!length && baseIndexOf(collection, value, fromIndex) > -1);\n    }\n\n    /**\n     * Invokes the method at `path` of each element in `collection`, returning\n     * an array of the results of each invoked method. Any additional arguments\n     * are provided to each invoked method. If `path` is a function, it's invoked\n     * for, and `this` bound to, each element in `collection`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Array|Function|string} path The path of the method to invoke or\n     *  the function invoked per iteration.\n     * @param {...*} [args] The arguments to invoke each method with.\n     * @returns {Array} Returns the array of results.\n     * @example\n     *\n     * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');\n     * // => [[1, 5, 7], [1, 2, 3]]\n     *\n     * _.invokeMap([123, 456], String.prototype.split, '');\n     * // => [['1', '2', '3'], ['4', '5', '6']]\n     */\n    var invokeMap = baseRest(function(collection, path, args) {\n      var index = -1,\n          isFunc = typeof path == 'function',\n          result = isArrayLike(collection) ? Array(collection.length) : [];\n\n      baseEach(collection, function(value) {\n        result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);\n      });\n      return result;\n    });\n\n    /**\n     * Creates an object composed of keys generated from the results of running\n     * each element of `collection` thru `iteratee`. The corresponding value of\n     * each key is the last element responsible for generating the key. The\n     * iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.\n     * @returns {Object} Returns the composed aggregate object.\n     * @example\n     *\n     * var array = [\n     *   { 'dir': 'left', 'code': 97 },\n     *   { 'dir': 'right', 'code': 100 }\n     * ];\n     *\n     * _.keyBy(array, function(o) {\n     *   return String.fromCharCode(o.code);\n     * });\n     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }\n     *\n     * _.keyBy(array, 'dir');\n     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }\n     */\n    var keyBy = createAggregator(function(result, value, key) {\n      baseAssignValue(result, key, value);\n    });\n\n    /**\n     * Creates an array of values by running each element in `collection` thru\n     * `iteratee`. The iteratee is invoked with three arguments:\n     * (value, index|key, collection).\n     *\n     * Many lodash methods are guarded to work as iteratees for methods like\n     * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.\n     *\n     * The guarded methods are:\n     * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,\n     * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,\n     * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,\n     * `template`, `trim`, `trimEnd`, `trimStart`, and `words`\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the new mapped array.\n     * @example\n     *\n     * function square(n) {\n     *   return n * n;\n     * }\n     *\n     * _.map([4, 8], square);\n     * // => [16, 64]\n     *\n     * _.map({ 'a': 4, 'b': 8 }, square);\n     * // => [16, 64] (iteration order is not guaranteed)\n     *\n     * var users = [\n     *   { 'user': 'barney' },\n     *   { 'user': 'fred' }\n     * ];\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.map(users, 'user');\n     * // => ['barney', 'fred']\n     */\n    function map(collection, iteratee) {\n      var func = isArray(collection) ? arrayMap : baseMap;\n      return func(collection, getIteratee(iteratee, 3));\n    }\n\n    /**\n     * This method is like `_.sortBy` except that it allows specifying the sort\n     * orders of the iteratees to sort by. If `orders` is unspecified, all values\n     * are sorted in ascending order. Otherwise, specify an order of \"desc\" for\n     * descending or \"asc\" for ascending sort order of corresponding values.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]\n     *  The iteratees to sort by.\n     * @param {string[]} [orders] The sort orders of `iteratees`.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.\n     * @returns {Array} Returns the new sorted array.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'fred',   'age': 48 },\n     *   { 'user': 'barney', 'age': 34 },\n     *   { 'user': 'fred',   'age': 40 },\n     *   { 'user': 'barney', 'age': 36 }\n     * ];\n     *\n     * // Sort by `user` in ascending order and by `age` in descending order.\n     * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);\n     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]\n     */\n    function orderBy(collection, iteratees, orders, guard) {\n      if (collection == null) {\n        return [];\n      }\n      if (!isArray(iteratees)) {\n        iteratees = iteratees == null ? [] : [iteratees];\n      }\n      orders = guard ? undefined : orders;\n      if (!isArray(orders)) {\n        orders = orders == null ? [] : [orders];\n      }\n      return baseOrderBy(collection, iteratees, orders);\n    }\n\n    /**\n     * Creates an array of elements split into two groups, the first of which\n     * contains elements `predicate` returns truthy for, the second of which\n     * contains elements `predicate` returns falsey for. The predicate is\n     * invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the array of grouped elements.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney',  'age': 36, 'active': false },\n     *   { 'user': 'fred',    'age': 40, 'active': true },\n     *   { 'user': 'pebbles', 'age': 1,  'active': false }\n     * ];\n     *\n     * _.partition(users, function(o) { return o.active; });\n     * // => objects for [['fred'], ['barney', 'pebbles']]\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.partition(users, { 'age': 1, 'active': false });\n     * // => objects for [['pebbles'], ['barney', 'fred']]\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.partition(users, ['active', false]);\n     * // => objects for [['barney', 'pebbles'], ['fred']]\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.partition(users, 'active');\n     * // => objects for [['fred'], ['barney', 'pebbles']]\n     */\n    var partition = createAggregator(function(result, value, key) {\n      result[key ? 0 : 1].push(value);\n    }, function() { return [[], []]; });\n\n    /**\n     * Reduces `collection` to a value which is the accumulated result of running\n     * each element in `collection` thru `iteratee`, where each successive\n     * invocation is supplied the return value of the previous. If `accumulator`\n     * is not given, the first element of `collection` is used as the initial\n     * value. The iteratee is invoked with four arguments:\n     * (accumulator, value, index|key, collection).\n     *\n     * Many lodash methods are guarded to work as iteratees for methods like\n     * `_.reduce`, `_.reduceRight`, and `_.transform`.\n     *\n     * The guarded methods are:\n     * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,\n     * and `sortBy`\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @param {*} [accumulator] The initial value.\n     * @returns {*} Returns the accumulated value.\n     * @see _.reduceRight\n     * @example\n     *\n     * _.reduce([1, 2], function(sum, n) {\n     *   return sum + n;\n     * }, 0);\n     * // => 3\n     *\n     * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {\n     *   (result[value] || (result[value] = [])).push(key);\n     *   return result;\n     * }, {});\n     * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)\n     */\n    function reduce(collection, iteratee, accumulator) {\n      var func = isArray(collection) ? arrayReduce : baseReduce,\n          initAccum = arguments.length < 3;\n\n      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);\n    }\n\n    /**\n     * This method is like `_.reduce` except that it iterates over elements of\n     * `collection` from right to left.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @param {*} [accumulator] The initial value.\n     * @returns {*} Returns the accumulated value.\n     * @see _.reduce\n     * @example\n     *\n     * var array = [[0, 1], [2, 3], [4, 5]];\n     *\n     * _.reduceRight(array, function(flattened, other) {\n     *   return flattened.concat(other);\n     * }, []);\n     * // => [4, 5, 2, 3, 0, 1]\n     */\n    function reduceRight(collection, iteratee, accumulator) {\n      var func = isArray(collection) ? arrayReduceRight : baseReduce,\n          initAccum = arguments.length < 3;\n\n      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);\n    }\n\n    /**\n     * The opposite of `_.filter`; this method returns the elements of `collection`\n     * that `predicate` does **not** return truthy for.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the new filtered array.\n     * @see _.filter\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney', 'age': 36, 'active': false },\n     *   { 'user': 'fred',   'age': 40, 'active': true }\n     * ];\n     *\n     * _.reject(users, function(o) { return !o.active; });\n     * // => objects for ['fred']\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.reject(users, { 'age': 40, 'active': true });\n     * // => objects for ['barney']\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.reject(users, ['active', false]);\n     * // => objects for ['fred']\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.reject(users, 'active');\n     * // => objects for ['barney']\n     */\n    function reject(collection, predicate) {\n      var func = isArray(collection) ? arrayFilter : baseFilter;\n      return func(collection, negate(getIteratee(predicate, 3)));\n    }\n\n    /**\n     * Gets a random element from `collection`.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to sample.\n     * @returns {*} Returns the random element.\n     * @example\n     *\n     * _.sample([1, 2, 3, 4]);\n     * // => 2\n     */\n    function sample(collection) {\n      var func = isArray(collection) ? arraySample : baseSample;\n      return func(collection);\n    }\n\n    /**\n     * Gets `n` random elements at unique keys from `collection` up to the\n     * size of `collection`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to sample.\n     * @param {number} [n=1] The number of elements to sample.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Array} Returns the random elements.\n     * @example\n     *\n     * _.sampleSize([1, 2, 3], 2);\n     * // => [3, 1]\n     *\n     * _.sampleSize([1, 2, 3], 4);\n     * // => [2, 3, 1]\n     */\n    function sampleSize(collection, n, guard) {\n      if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {\n        n = 1;\n      } else {\n        n = toInteger(n);\n      }\n      var func = isArray(collection) ? arraySampleSize : baseSampleSize;\n      return func(collection, n);\n    }\n\n    /**\n     * Creates an array of shuffled values, using a version of the\n     * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to shuffle.\n     * @returns {Array} Returns the new shuffled array.\n     * @example\n     *\n     * _.shuffle([1, 2, 3, 4]);\n     * // => [4, 1, 3, 2]\n     */\n    function shuffle(collection) {\n      var func = isArray(collection) ? arrayShuffle : baseShuffle;\n      return func(collection);\n    }\n\n    /**\n     * Gets the size of `collection` by returning its length for array-like\n     * values or the number of own enumerable string keyed properties for objects.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object|string} collection The collection to inspect.\n     * @returns {number} Returns the collection size.\n     * @example\n     *\n     * _.size([1, 2, 3]);\n     * // => 3\n     *\n     * _.size({ 'a': 1, 'b': 2 });\n     * // => 2\n     *\n     * _.size('pebbles');\n     * // => 7\n     */\n    function size(collection) {\n      if (collection == null) {\n        return 0;\n      }\n      if (isArrayLike(collection)) {\n        return isString(collection) ? stringSize(collection) : collection.length;\n      }\n      var tag = getTag(collection);\n      if (tag == mapTag || tag == setTag) {\n        return collection.size;\n      }\n      return baseKeys(collection).length;\n    }\n\n    /**\n     * Checks if `predicate` returns truthy for **any** element of `collection`.\n     * Iteration is stopped once `predicate` returns truthy. The predicate is\n     * invoked with three arguments: (value, index|key, collection).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {boolean} Returns `true` if any element passes the predicate check,\n     *  else `false`.\n     * @example\n     *\n     * _.some([null, 0, 'yes', false], Boolean);\n     * // => true\n     *\n     * var users = [\n     *   { 'user': 'barney', 'active': true },\n     *   { 'user': 'fred',   'active': false }\n     * ];\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.some(users, { 'user': 'barney', 'active': false });\n     * // => false\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.some(users, ['active', false]);\n     * // => true\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.some(users, 'active');\n     * // => true\n     */\n    function some(collection, predicate, guard) {\n      var func = isArray(collection) ? arraySome : baseSome;\n      if (guard && isIterateeCall(collection, predicate, guard)) {\n        predicate = undefined;\n      }\n      return func(collection, getIteratee(predicate, 3));\n    }\n\n    /**\n     * Creates an array of elements, sorted in ascending order by the results of\n     * running each element in a collection thru each iteratee. This method\n     * performs a stable sort, that is, it preserves the original sort order of\n     * equal elements. The iteratees are invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Collection\n     * @param {Array|Object} collection The collection to iterate over.\n     * @param {...(Function|Function[])} [iteratees=[_.identity]]\n     *  The iteratees to sort by.\n     * @returns {Array} Returns the new sorted array.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'fred',   'age': 48 },\n     *   { 'user': 'barney', 'age': 36 },\n     *   { 'user': 'fred',   'age': 40 },\n     *   { 'user': 'barney', 'age': 34 }\n     * ];\n     *\n     * _.sortBy(users, [function(o) { return o.user; }]);\n     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]\n     *\n     * _.sortBy(users, ['user', 'age']);\n     * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]\n     */\n    var sortBy = baseRest(function(collection, iteratees) {\n      if (collection == null) {\n        return [];\n      }\n      var length = iteratees.length;\n      if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {\n        iteratees = [];\n      } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {\n        iteratees = [iteratees[0]];\n      }\n      return baseOrderBy(collection, baseFlatten(iteratees, 1), []);\n    });\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Gets the timestamp of the number of milliseconds that have elapsed since\n     * the Unix epoch (1 January 1970 00:00:00 UTC).\n     *\n     * @static\n     * @memberOf _\n     * @since 2.4.0\n     * @category Date\n     * @returns {number} Returns the timestamp.\n     * @example\n     *\n     * _.defer(function(stamp) {\n     *   console.log(_.now() - stamp);\n     * }, _.now());\n     * // => Logs the number of milliseconds it took for the deferred invocation.\n     */\n    var now = ctxNow || function() {\n      return root.Date.now();\n    };\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * The opposite of `_.before`; this method creates a function that invokes\n     * `func` once it's called `n` or more times.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {number} n The number of calls before `func` is invoked.\n     * @param {Function} func The function to restrict.\n     * @returns {Function} Returns the new restricted function.\n     * @example\n     *\n     * var saves = ['profile', 'settings'];\n     *\n     * var done = _.after(saves.length, function() {\n     *   console.log('done saving!');\n     * });\n     *\n     * _.forEach(saves, function(type) {\n     *   asyncSave({ 'type': type, 'complete': done });\n     * });\n     * // => Logs 'done saving!' after the two async saves have completed.\n     */\n    function after(n, func) {\n      if (typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      n = toInteger(n);\n      return function() {\n        if (--n < 1) {\n          return func.apply(this, arguments);\n        }\n      };\n    }\n\n    /**\n     * Creates a function that invokes `func`, with up to `n` arguments,\n     * ignoring any additional arguments.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Function\n     * @param {Function} func The function to cap arguments for.\n     * @param {number} [n=func.length] The arity cap.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Function} Returns the new capped function.\n     * @example\n     *\n     * _.map(['6', '8', '10'], _.ary(parseInt, 1));\n     * // => [6, 8, 10]\n     */\n    function ary(func, n, guard) {\n      n = guard ? undefined : n;\n      n = (func && n == null) ? func.length : n;\n      return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);\n    }\n\n    /**\n     * Creates a function that invokes `func`, with the `this` binding and arguments\n     * of the created function, while it's called less than `n` times. Subsequent\n     * calls to the created function return the result of the last `func` invocation.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Function\n     * @param {number} n The number of calls at which `func` is no longer invoked.\n     * @param {Function} func The function to restrict.\n     * @returns {Function} Returns the new restricted function.\n     * @example\n     *\n     * jQuery(element).on('click', _.before(5, addContactToList));\n     * // => Allows adding up to 4 contacts to the list.\n     */\n    function before(n, func) {\n      var result;\n      if (typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      n = toInteger(n);\n      return function() {\n        if (--n > 0) {\n          result = func.apply(this, arguments);\n        }\n        if (n <= 1) {\n          func = undefined;\n        }\n        return result;\n      };\n    }\n\n    /**\n     * Creates a function that invokes `func` with the `this` binding of `thisArg`\n     * and `partials` prepended to the arguments it receives.\n     *\n     * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,\n     * may be used as a placeholder for partially applied arguments.\n     *\n     * **Note:** Unlike native `Function#bind`, this method doesn't set the \"length\"\n     * property of bound functions.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to bind.\n     * @param {*} thisArg The `this` binding of `func`.\n     * @param {...*} [partials] The arguments to be partially applied.\n     * @returns {Function} Returns the new bound function.\n     * @example\n     *\n     * function greet(greeting, punctuation) {\n     *   return greeting + ' ' + this.user + punctuation;\n     * }\n     *\n     * var object = { 'user': 'fred' };\n     *\n     * var bound = _.bind(greet, object, 'hi');\n     * bound('!');\n     * // => 'hi fred!'\n     *\n     * // Bound with placeholders.\n     * var bound = _.bind(greet, object, _, '!');\n     * bound('hi');\n     * // => 'hi fred!'\n     */\n    var bind = baseRest(function(func, thisArg, partials) {\n      var bitmask = WRAP_BIND_FLAG;\n      if (partials.length) {\n        var holders = replaceHolders(partials, getHolder(bind));\n        bitmask |= WRAP_PARTIAL_FLAG;\n      }\n      return createWrap(func, bitmask, thisArg, partials, holders);\n    });\n\n    /**\n     * Creates a function that invokes the method at `object[key]` with `partials`\n     * prepended to the arguments it receives.\n     *\n     * This method differs from `_.bind` by allowing bound functions to reference\n     * methods that may be redefined or don't yet exist. See\n     * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)\n     * for more details.\n     *\n     * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic\n     * builds, may be used as a placeholder for partially applied arguments.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.10.0\n     * @category Function\n     * @param {Object} object The object to invoke the method on.\n     * @param {string} key The key of the method.\n     * @param {...*} [partials] The arguments to be partially applied.\n     * @returns {Function} Returns the new bound function.\n     * @example\n     *\n     * var object = {\n     *   'user': 'fred',\n     *   'greet': function(greeting, punctuation) {\n     *     return greeting + ' ' + this.user + punctuation;\n     *   }\n     * };\n     *\n     * var bound = _.bindKey(object, 'greet', 'hi');\n     * bound('!');\n     * // => 'hi fred!'\n     *\n     * object.greet = function(greeting, punctuation) {\n     *   return greeting + 'ya ' + this.user + punctuation;\n     * };\n     *\n     * bound('!');\n     * // => 'hiya fred!'\n     *\n     * // Bound with placeholders.\n     * var bound = _.bindKey(object, 'greet', _, '!');\n     * bound('hi');\n     * // => 'hiya fred!'\n     */\n    var bindKey = baseRest(function(object, key, partials) {\n      var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;\n      if (partials.length) {\n        var holders = replaceHolders(partials, getHolder(bindKey));\n        bitmask |= WRAP_PARTIAL_FLAG;\n      }\n      return createWrap(key, bitmask, object, partials, holders);\n    });\n\n    /**\n     * Creates a function that accepts arguments of `func` and either invokes\n     * `func` returning its result, if at least `arity` number of arguments have\n     * been provided, or returns a function that accepts the remaining `func`\n     * arguments, and so on. The arity of `func` may be specified if `func.length`\n     * is not sufficient.\n     *\n     * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,\n     * may be used as a placeholder for provided arguments.\n     *\n     * **Note:** This method doesn't set the \"length\" property of curried functions.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Function\n     * @param {Function} func The function to curry.\n     * @param {number} [arity=func.length] The arity of `func`.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Function} Returns the new curried function.\n     * @example\n     *\n     * var abc = function(a, b, c) {\n     *   return [a, b, c];\n     * };\n     *\n     * var curried = _.curry(abc);\n     *\n     * curried(1)(2)(3);\n     * // => [1, 2, 3]\n     *\n     * curried(1, 2)(3);\n     * // => [1, 2, 3]\n     *\n     * curried(1, 2, 3);\n     * // => [1, 2, 3]\n     *\n     * // Curried with placeholders.\n     * curried(1)(_, 3)(2);\n     * // => [1, 2, 3]\n     */\n    function curry(func, arity, guard) {\n      arity = guard ? undefined : arity;\n      var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);\n      result.placeholder = curry.placeholder;\n      return result;\n    }\n\n    /**\n     * This method is like `_.curry` except that arguments are applied to `func`\n     * in the manner of `_.partialRight` instead of `_.partial`.\n     *\n     * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic\n     * builds, may be used as a placeholder for provided arguments.\n     *\n     * **Note:** This method doesn't set the \"length\" property of curried functions.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Function\n     * @param {Function} func The function to curry.\n     * @param {number} [arity=func.length] The arity of `func`.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Function} Returns the new curried function.\n     * @example\n     *\n     * var abc = function(a, b, c) {\n     *   return [a, b, c];\n     * };\n     *\n     * var curried = _.curryRight(abc);\n     *\n     * curried(3)(2)(1);\n     * // => [1, 2, 3]\n     *\n     * curried(2, 3)(1);\n     * // => [1, 2, 3]\n     *\n     * curried(1, 2, 3);\n     * // => [1, 2, 3]\n     *\n     * // Curried with placeholders.\n     * curried(3)(1, _)(2);\n     * // => [1, 2, 3]\n     */\n    function curryRight(func, arity, guard) {\n      arity = guard ? undefined : arity;\n      var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);\n      result.placeholder = curryRight.placeholder;\n      return result;\n    }\n\n    /**\n     * Creates a debounced function that delays invoking `func` until after `wait`\n     * milliseconds have elapsed since the last time the debounced function was\n     * invoked. The debounced function comes with a `cancel` method to cancel\n     * delayed `func` invocations and a `flush` method to immediately invoke them.\n     * Provide `options` to indicate whether `func` should be invoked on the\n     * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n     * with the last arguments provided to the debounced function. Subsequent\n     * calls to the debounced function return the result of the last `func`\n     * invocation.\n     *\n     * **Note:** If `leading` and `trailing` options are `true`, `func` is\n     * invoked on the trailing edge of the timeout only if the debounced function\n     * is invoked more than once during the `wait` timeout.\n     *\n     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n     * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n     *\n     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n     * for details over the differences between `_.debounce` and `_.throttle`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to debounce.\n     * @param {number} [wait=0] The number of milliseconds to delay.\n     * @param {Object} [options={}] The options object.\n     * @param {boolean} [options.leading=false]\n     *  Specify invoking on the leading edge of the timeout.\n     * @param {number} [options.maxWait]\n     *  The maximum time `func` is allowed to be delayed before it's invoked.\n     * @param {boolean} [options.trailing=true]\n     *  Specify invoking on the trailing edge of the timeout.\n     * @returns {Function} Returns the new debounced function.\n     * @example\n     *\n     * // Avoid costly calculations while the window size is in flux.\n     * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n     *\n     * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n     * jQuery(element).on('click', _.debounce(sendMail, 300, {\n     *   'leading': true,\n     *   'trailing': false\n     * }));\n     *\n     * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n     * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n     * var source = new EventSource('/stream');\n     * jQuery(source).on('message', debounced);\n     *\n     * // Cancel the trailing debounced invocation.\n     * jQuery(window).on('popstate', debounced.cancel);\n     */\n    function debounce(func, wait, options) {\n      var lastArgs,\n          lastThis,\n          maxWait,\n          result,\n          timerId,\n          lastCallTime,\n          lastInvokeTime = 0,\n          leading = false,\n          maxing = false,\n          trailing = true;\n\n      if (typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      wait = toNumber(wait) || 0;\n      if (isObject(options)) {\n        leading = !!options.leading;\n        maxing = 'maxWait' in options;\n        maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n        trailing = 'trailing' in options ? !!options.trailing : trailing;\n      }\n\n      function invokeFunc(time) {\n        var args = lastArgs,\n            thisArg = lastThis;\n\n        lastArgs = lastThis = undefined;\n        lastInvokeTime = time;\n        result = func.apply(thisArg, args);\n        return result;\n      }\n\n      function leadingEdge(time) {\n        // Reset any `maxWait` timer.\n        lastInvokeTime = time;\n        // Start the timer for the trailing edge.\n        timerId = setTimeout(timerExpired, wait);\n        // Invoke the leading edge.\n        return leading ? invokeFunc(time) : result;\n      }\n\n      function remainingWait(time) {\n        var timeSinceLastCall = time - lastCallTime,\n            timeSinceLastInvoke = time - lastInvokeTime,\n            result = wait - timeSinceLastCall;\n\n        return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;\n      }\n\n      function shouldInvoke(time) {\n        var timeSinceLastCall = time - lastCallTime,\n            timeSinceLastInvoke = time - lastInvokeTime;\n\n        // Either this is the first call, activity has stopped and we're at the\n        // trailing edge, the system time has gone backwards and we're treating\n        // it as the trailing edge, or we've hit the `maxWait` limit.\n        return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n          (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n      }\n\n      function timerExpired() {\n        var time = now();\n        if (shouldInvoke(time)) {\n          return trailingEdge(time);\n        }\n        // Restart the timer.\n        timerId = setTimeout(timerExpired, remainingWait(time));\n      }\n\n      function trailingEdge(time) {\n        timerId = undefined;\n\n        // Only invoke if we have `lastArgs` which means `func` has been\n        // debounced at least once.\n        if (trailing && lastArgs) {\n          return invokeFunc(time);\n        }\n        lastArgs = lastThis = undefined;\n        return result;\n      }\n\n      function cancel() {\n        if (timerId !== undefined) {\n          clearTimeout(timerId);\n        }\n        lastInvokeTime = 0;\n        lastArgs = lastCallTime = lastThis = timerId = undefined;\n      }\n\n      function flush() {\n        return timerId === undefined ? result : trailingEdge(now());\n      }\n\n      function debounced() {\n        var time = now(),\n            isInvoking = shouldInvoke(time);\n\n        lastArgs = arguments;\n        lastThis = this;\n        lastCallTime = time;\n\n        if (isInvoking) {\n          if (timerId === undefined) {\n            return leadingEdge(lastCallTime);\n          }\n          if (maxing) {\n            // Handle invocations in a tight loop.\n            timerId = setTimeout(timerExpired, wait);\n            return invokeFunc(lastCallTime);\n          }\n        }\n        if (timerId === undefined) {\n          timerId = setTimeout(timerExpired, wait);\n        }\n        return result;\n      }\n      debounced.cancel = cancel;\n      debounced.flush = flush;\n      return debounced;\n    }\n\n    /**\n     * Defers invoking the `func` until the current call stack has cleared. Any\n     * additional arguments are provided to `func` when it's invoked.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to defer.\n     * @param {...*} [args] The arguments to invoke `func` with.\n     * @returns {number} Returns the timer id.\n     * @example\n     *\n     * _.defer(function(text) {\n     *   console.log(text);\n     * }, 'deferred');\n     * // => Logs 'deferred' after one millisecond.\n     */\n    var defer = baseRest(function(func, args) {\n      return baseDelay(func, 1, args);\n    });\n\n    /**\n     * Invokes `func` after `wait` milliseconds. Any additional arguments are\n     * provided to `func` when it's invoked.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to delay.\n     * @param {number} wait The number of milliseconds to delay invocation.\n     * @param {...*} [args] The arguments to invoke `func` with.\n     * @returns {number} Returns the timer id.\n     * @example\n     *\n     * _.delay(function(text) {\n     *   console.log(text);\n     * }, 1000, 'later');\n     * // => Logs 'later' after one second.\n     */\n    var delay = baseRest(function(func, wait, args) {\n      return baseDelay(func, toNumber(wait) || 0, args);\n    });\n\n    /**\n     * Creates a function that invokes `func` with arguments reversed.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Function\n     * @param {Function} func The function to flip arguments for.\n     * @returns {Function} Returns the new flipped function.\n     * @example\n     *\n     * var flipped = _.flip(function() {\n     *   return _.toArray(arguments);\n     * });\n     *\n     * flipped('a', 'b', 'c', 'd');\n     * // => ['d', 'c', 'b', 'a']\n     */\n    function flip(func) {\n      return createWrap(func, WRAP_FLIP_FLAG);\n    }\n\n    /**\n     * Creates a function that memoizes the result of `func`. If `resolver` is\n     * provided, it determines the cache key for storing the result based on the\n     * arguments provided to the memoized function. By default, the first argument\n     * provided to the memoized function is used as the map cache key. The `func`\n     * is invoked with the `this` binding of the memoized function.\n     *\n     * **Note:** The cache is exposed as the `cache` property on the memoized\n     * function. Its creation may be customized by replacing the `_.memoize.Cache`\n     * constructor with one whose instances implement the\n     * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)\n     * method interface of `clear`, `delete`, `get`, `has`, and `set`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to have its output memoized.\n     * @param {Function} [resolver] The function to resolve the cache key.\n     * @returns {Function} Returns the new memoized function.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': 2 };\n     * var other = { 'c': 3, 'd': 4 };\n     *\n     * var values = _.memoize(_.values);\n     * values(object);\n     * // => [1, 2]\n     *\n     * values(other);\n     * // => [3, 4]\n     *\n     * object.a = 2;\n     * values(object);\n     * // => [1, 2]\n     *\n     * // Modify the result cache.\n     * values.cache.set(object, ['a', 'b']);\n     * values(object);\n     * // => ['a', 'b']\n     *\n     * // Replace `_.memoize.Cache`.\n     * _.memoize.Cache = WeakMap;\n     */\n    function memoize(func, resolver) {\n      if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      var memoized = function() {\n        var args = arguments,\n            key = resolver ? resolver.apply(this, args) : args[0],\n            cache = memoized.cache;\n\n        if (cache.has(key)) {\n          return cache.get(key);\n        }\n        var result = func.apply(this, args);\n        memoized.cache = cache.set(key, result) || cache;\n        return result;\n      };\n      memoized.cache = new (memoize.Cache || MapCache);\n      return memoized;\n    }\n\n    // Expose `MapCache`.\n    memoize.Cache = MapCache;\n\n    /**\n     * Creates a function that negates the result of the predicate `func`. The\n     * `func` predicate is invoked with the `this` binding and arguments of the\n     * created function.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Function\n     * @param {Function} predicate The predicate to negate.\n     * @returns {Function} Returns the new negated function.\n     * @example\n     *\n     * function isEven(n) {\n     *   return n % 2 == 0;\n     * }\n     *\n     * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));\n     * // => [1, 3, 5]\n     */\n    function negate(predicate) {\n      if (typeof predicate != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      return function() {\n        var args = arguments;\n        switch (args.length) {\n          case 0: return !predicate.call(this);\n          case 1: return !predicate.call(this, args[0]);\n          case 2: return !predicate.call(this, args[0], args[1]);\n          case 3: return !predicate.call(this, args[0], args[1], args[2]);\n        }\n        return !predicate.apply(this, args);\n      };\n    }\n\n    /**\n     * Creates a function that is restricted to invoking `func` once. Repeat calls\n     * to the function return the value of the first invocation. The `func` is\n     * invoked with the `this` binding and arguments of the created function.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to restrict.\n     * @returns {Function} Returns the new restricted function.\n     * @example\n     *\n     * var initialize = _.once(createApplication);\n     * initialize();\n     * initialize();\n     * // => `createApplication` is invoked once\n     */\n    function once(func) {\n      return before(2, func);\n    }\n\n    /**\n     * Creates a function that invokes `func` with its arguments transformed.\n     *\n     * @static\n     * @since 4.0.0\n     * @memberOf _\n     * @category Function\n     * @param {Function} func The function to wrap.\n     * @param {...(Function|Function[])} [transforms=[_.identity]]\n     *  The argument transforms.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * function doubled(n) {\n     *   return n * 2;\n     * }\n     *\n     * function square(n) {\n     *   return n * n;\n     * }\n     *\n     * var func = _.overArgs(function(x, y) {\n     *   return [x, y];\n     * }, [square, doubled]);\n     *\n     * func(9, 3);\n     * // => [81, 6]\n     *\n     * func(10, 5);\n     * // => [100, 10]\n     */\n    var overArgs = castRest(function(func, transforms) {\n      transforms = (transforms.length == 1 && isArray(transforms[0]))\n        ? arrayMap(transforms[0], baseUnary(getIteratee()))\n        : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));\n\n      var funcsLength = transforms.length;\n      return baseRest(function(args) {\n        var index = -1,\n            length = nativeMin(args.length, funcsLength);\n\n        while (++index < length) {\n          args[index] = transforms[index].call(this, args[index]);\n        }\n        return apply(func, this, args);\n      });\n    });\n\n    /**\n     * Creates a function that invokes `func` with `partials` prepended to the\n     * arguments it receives. This method is like `_.bind` except it does **not**\n     * alter the `this` binding.\n     *\n     * The `_.partial.placeholder` value, which defaults to `_` in monolithic\n     * builds, may be used as a placeholder for partially applied arguments.\n     *\n     * **Note:** This method doesn't set the \"length\" property of partially\n     * applied functions.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.2.0\n     * @category Function\n     * @param {Function} func The function to partially apply arguments to.\n     * @param {...*} [partials] The arguments to be partially applied.\n     * @returns {Function} Returns the new partially applied function.\n     * @example\n     *\n     * function greet(greeting, name) {\n     *   return greeting + ' ' + name;\n     * }\n     *\n     * var sayHelloTo = _.partial(greet, 'hello');\n     * sayHelloTo('fred');\n     * // => 'hello fred'\n     *\n     * // Partially applied with placeholders.\n     * var greetFred = _.partial(greet, _, 'fred');\n     * greetFred('hi');\n     * // => 'hi fred'\n     */\n    var partial = baseRest(function(func, partials) {\n      var holders = replaceHolders(partials, getHolder(partial));\n      return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);\n    });\n\n    /**\n     * This method is like `_.partial` except that partially applied arguments\n     * are appended to the arguments it receives.\n     *\n     * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic\n     * builds, may be used as a placeholder for partially applied arguments.\n     *\n     * **Note:** This method doesn't set the \"length\" property of partially\n     * applied functions.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.0.0\n     * @category Function\n     * @param {Function} func The function to partially apply arguments to.\n     * @param {...*} [partials] The arguments to be partially applied.\n     * @returns {Function} Returns the new partially applied function.\n     * @example\n     *\n     * function greet(greeting, name) {\n     *   return greeting + ' ' + name;\n     * }\n     *\n     * var greetFred = _.partialRight(greet, 'fred');\n     * greetFred('hi');\n     * // => 'hi fred'\n     *\n     * // Partially applied with placeholders.\n     * var sayHelloTo = _.partialRight(greet, 'hello', _);\n     * sayHelloTo('fred');\n     * // => 'hello fred'\n     */\n    var partialRight = baseRest(function(func, partials) {\n      var holders = replaceHolders(partials, getHolder(partialRight));\n      return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);\n    });\n\n    /**\n     * Creates a function that invokes `func` with arguments arranged according\n     * to the specified `indexes` where the argument value at the first index is\n     * provided as the first argument, the argument value at the second index is\n     * provided as the second argument, and so on.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Function\n     * @param {Function} func The function to rearrange arguments for.\n     * @param {...(number|number[])} indexes The arranged argument indexes.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * var rearged = _.rearg(function(a, b, c) {\n     *   return [a, b, c];\n     * }, [2, 0, 1]);\n     *\n     * rearged('b', 'c', 'a')\n     * // => ['a', 'b', 'c']\n     */\n    var rearg = flatRest(function(func, indexes) {\n      return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);\n    });\n\n    /**\n     * Creates a function that invokes `func` with the `this` binding of the\n     * created function and arguments from `start` and beyond provided as\n     * an array.\n     *\n     * **Note:** This method is based on the\n     * [rest parameter](https://mdn.io/rest_parameters).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Function\n     * @param {Function} func The function to apply a rest parameter to.\n     * @param {number} [start=func.length-1] The start position of the rest parameter.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * var say = _.rest(function(what, names) {\n     *   return what + ' ' + _.initial(names).join(', ') +\n     *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);\n     * });\n     *\n     * say('hello', 'fred', 'barney', 'pebbles');\n     * // => 'hello fred, barney, & pebbles'\n     */\n    function rest(func, start) {\n      if (typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      start = start === undefined ? start : toInteger(start);\n      return baseRest(func, start);\n    }\n\n    /**\n     * Creates a function that invokes `func` with the `this` binding of the\n     * create function and an array of arguments much like\n     * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).\n     *\n     * **Note:** This method is based on the\n     * [spread operator](https://mdn.io/spread_operator).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.2.0\n     * @category Function\n     * @param {Function} func The function to spread arguments over.\n     * @param {number} [start=0] The start position of the spread.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * var say = _.spread(function(who, what) {\n     *   return who + ' says ' + what;\n     * });\n     *\n     * say(['fred', 'hello']);\n     * // => 'fred says hello'\n     *\n     * var numbers = Promise.all([\n     *   Promise.resolve(40),\n     *   Promise.resolve(36)\n     * ]);\n     *\n     * numbers.then(_.spread(function(x, y) {\n     *   return x + y;\n     * }));\n     * // => a Promise of 76\n     */\n    function spread(func, start) {\n      if (typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      start = start == null ? 0 : nativeMax(toInteger(start), 0);\n      return baseRest(function(args) {\n        var array = args[start],\n            otherArgs = castSlice(args, 0, start);\n\n        if (array) {\n          arrayPush(otherArgs, array);\n        }\n        return apply(func, this, otherArgs);\n      });\n    }\n\n    /**\n     * Creates a throttled function that only invokes `func` at most once per\n     * every `wait` milliseconds. The throttled function comes with a `cancel`\n     * method to cancel delayed `func` invocations and a `flush` method to\n     * immediately invoke them. Provide `options` to indicate whether `func`\n     * should be invoked on the leading and/or trailing edge of the `wait`\n     * timeout. The `func` is invoked with the last arguments provided to the\n     * throttled function. Subsequent calls to the throttled function return the\n     * result of the last `func` invocation.\n     *\n     * **Note:** If `leading` and `trailing` options are `true`, `func` is\n     * invoked on the trailing edge of the timeout only if the throttled function\n     * is invoked more than once during the `wait` timeout.\n     *\n     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n     * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n     *\n     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n     * for details over the differences between `_.throttle` and `_.debounce`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to throttle.\n     * @param {number} [wait=0] The number of milliseconds to throttle invocations to.\n     * @param {Object} [options={}] The options object.\n     * @param {boolean} [options.leading=true]\n     *  Specify invoking on the leading edge of the timeout.\n     * @param {boolean} [options.trailing=true]\n     *  Specify invoking on the trailing edge of the timeout.\n     * @returns {Function} Returns the new throttled function.\n     * @example\n     *\n     * // Avoid excessively updating the position while scrolling.\n     * jQuery(window).on('scroll', _.throttle(updatePosition, 100));\n     *\n     * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.\n     * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });\n     * jQuery(element).on('click', throttled);\n     *\n     * // Cancel the trailing throttled invocation.\n     * jQuery(window).on('popstate', throttled.cancel);\n     */\n    function throttle(func, wait, options) {\n      var leading = true,\n          trailing = true;\n\n      if (typeof func != 'function') {\n        throw new TypeError(FUNC_ERROR_TEXT);\n      }\n      if (isObject(options)) {\n        leading = 'leading' in options ? !!options.leading : leading;\n        trailing = 'trailing' in options ? !!options.trailing : trailing;\n      }\n      return debounce(func, wait, {\n        'leading': leading,\n        'maxWait': wait,\n        'trailing': trailing\n      });\n    }\n\n    /**\n     * Creates a function that accepts up to one argument, ignoring any\n     * additional arguments.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Function\n     * @param {Function} func The function to cap arguments for.\n     * @returns {Function} Returns the new capped function.\n     * @example\n     *\n     * _.map(['6', '8', '10'], _.unary(parseInt));\n     * // => [6, 8, 10]\n     */\n    function unary(func) {\n      return ary(func, 1);\n    }\n\n    /**\n     * Creates a function that provides `value` to `wrapper` as its first\n     * argument. Any additional arguments provided to the function are appended\n     * to those provided to the `wrapper`. The wrapper is invoked with the `this`\n     * binding of the created function.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {*} value The value to wrap.\n     * @param {Function} [wrapper=identity] The wrapper function.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * var p = _.wrap(_.escape, function(func, text) {\n     *   return '<p>' + func(text) + '</p>';\n     * });\n     *\n     * p('fred, barney, & pebbles');\n     * // => '<p>fred, barney, &amp; pebbles</p>'\n     */\n    function wrap(value, wrapper) {\n      return partial(castFunction(wrapper), value);\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Casts `value` as an array if it's not one.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.4.0\n     * @category Lang\n     * @param {*} value The value to inspect.\n     * @returns {Array} Returns the cast array.\n     * @example\n     *\n     * _.castArray(1);\n     * // => [1]\n     *\n     * _.castArray({ 'a': 1 });\n     * // => [{ 'a': 1 }]\n     *\n     * _.castArray('abc');\n     * // => ['abc']\n     *\n     * _.castArray(null);\n     * // => [null]\n     *\n     * _.castArray(undefined);\n     * // => [undefined]\n     *\n     * _.castArray();\n     * // => []\n     *\n     * var array = [1, 2, 3];\n     * console.log(_.castArray(array) === array);\n     * // => true\n     */\n    function castArray() {\n      if (!arguments.length) {\n        return [];\n      }\n      var value = arguments[0];\n      return isArray(value) ? value : [value];\n    }\n\n    /**\n     * Creates a shallow clone of `value`.\n     *\n     * **Note:** This method is loosely based on the\n     * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)\n     * and supports cloning arrays, array buffers, booleans, date objects, maps,\n     * numbers, `Object` objects, regexes, sets, strings, symbols, and typed\n     * arrays. The own enumerable properties of `arguments` objects are cloned\n     * as plain objects. An empty object is returned for uncloneable values such\n     * as error objects, functions, DOM nodes, and WeakMaps.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to clone.\n     * @returns {*} Returns the cloned value.\n     * @see _.cloneDeep\n     * @example\n     *\n     * var objects = [{ 'a': 1 }, { 'b': 2 }];\n     *\n     * var shallow = _.clone(objects);\n     * console.log(shallow[0] === objects[0]);\n     * // => true\n     */\n    function clone(value) {\n      return baseClone(value, CLONE_SYMBOLS_FLAG);\n    }\n\n    /**\n     * This method is like `_.clone` except that it accepts `customizer` which\n     * is invoked to produce the cloned value. If `customizer` returns `undefined`,\n     * cloning is handled by the method instead. The `customizer` is invoked with\n     * up to four arguments; (value [, index|key, object, stack]).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to clone.\n     * @param {Function} [customizer] The function to customize cloning.\n     * @returns {*} Returns the cloned value.\n     * @see _.cloneDeepWith\n     * @example\n     *\n     * function customizer(value) {\n     *   if (_.isElement(value)) {\n     *     return value.cloneNode(false);\n     *   }\n     * }\n     *\n     * var el = _.cloneWith(document.body, customizer);\n     *\n     * console.log(el === document.body);\n     * // => false\n     * console.log(el.nodeName);\n     * // => 'BODY'\n     * console.log(el.childNodes.length);\n     * // => 0\n     */\n    function cloneWith(value, customizer) {\n      customizer = typeof customizer == 'function' ? customizer : undefined;\n      return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);\n    }\n\n    /**\n     * This method is like `_.clone` except that it recursively clones `value`.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.0.0\n     * @category Lang\n     * @param {*} value The value to recursively clone.\n     * @returns {*} Returns the deep cloned value.\n     * @see _.clone\n     * @example\n     *\n     * var objects = [{ 'a': 1 }, { 'b': 2 }];\n     *\n     * var deep = _.cloneDeep(objects);\n     * console.log(deep[0] === objects[0]);\n     * // => false\n     */\n    function cloneDeep(value) {\n      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);\n    }\n\n    /**\n     * This method is like `_.cloneWith` except that it recursively clones `value`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to recursively clone.\n     * @param {Function} [customizer] The function to customize cloning.\n     * @returns {*} Returns the deep cloned value.\n     * @see _.cloneWith\n     * @example\n     *\n     * function customizer(value) {\n     *   if (_.isElement(value)) {\n     *     return value.cloneNode(true);\n     *   }\n     * }\n     *\n     * var el = _.cloneDeepWith(document.body, customizer);\n     *\n     * console.log(el === document.body);\n     * // => false\n     * console.log(el.nodeName);\n     * // => 'BODY'\n     * console.log(el.childNodes.length);\n     * // => 20\n     */\n    function cloneDeepWith(value, customizer) {\n      customizer = typeof customizer == 'function' ? customizer : undefined;\n      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);\n    }\n\n    /**\n     * Checks if `object` conforms to `source` by invoking the predicate\n     * properties of `source` with the corresponding property values of `object`.\n     *\n     * **Note:** This method is equivalent to `_.conforms` when `source` is\n     * partially applied.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.14.0\n     * @category Lang\n     * @param {Object} object The object to inspect.\n     * @param {Object} source The object of property predicates to conform to.\n     * @returns {boolean} Returns `true` if `object` conforms, else `false`.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': 2 };\n     *\n     * _.conformsTo(object, { 'b': function(n) { return n > 1; } });\n     * // => true\n     *\n     * _.conformsTo(object, { 'b': function(n) { return n > 2; } });\n     * // => false\n     */\n    function conformsTo(object, source) {\n      return source == null || baseConformsTo(object, source, keys(source));\n    }\n\n    /**\n     * Performs a\n     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n     * comparison between two values to determine if they are equivalent.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n     * @example\n     *\n     * var object = { 'a': 1 };\n     * var other = { 'a': 1 };\n     *\n     * _.eq(object, object);\n     * // => true\n     *\n     * _.eq(object, other);\n     * // => false\n     *\n     * _.eq('a', 'a');\n     * // => true\n     *\n     * _.eq('a', Object('a'));\n     * // => false\n     *\n     * _.eq(NaN, NaN);\n     * // => true\n     */\n    function eq(value, other) {\n      return value === other || (value !== value && other !== other);\n    }\n\n    /**\n     * Checks if `value` is greater than `other`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.9.0\n     * @category Lang\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if `value` is greater than `other`,\n     *  else `false`.\n     * @see _.lt\n     * @example\n     *\n     * _.gt(3, 1);\n     * // => true\n     *\n     * _.gt(3, 3);\n     * // => false\n     *\n     * _.gt(1, 3);\n     * // => false\n     */\n    var gt = createRelationalOperation(baseGt);\n\n    /**\n     * Checks if `value` is greater than or equal to `other`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.9.0\n     * @category Lang\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if `value` is greater than or equal to\n     *  `other`, else `false`.\n     * @see _.lte\n     * @example\n     *\n     * _.gte(3, 1);\n     * // => true\n     *\n     * _.gte(3, 3);\n     * // => true\n     *\n     * _.gte(1, 3);\n     * // => false\n     */\n    var gte = createRelationalOperation(function(value, other) {\n      return value >= other;\n    });\n\n    /**\n     * Checks if `value` is likely an `arguments` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n     *  else `false`.\n     * @example\n     *\n     * _.isArguments(function() { return arguments; }());\n     * // => true\n     *\n     * _.isArguments([1, 2, 3]);\n     * // => false\n     */\n    var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n      return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&\n        !propertyIsEnumerable.call(value, 'callee');\n    };\n\n    /**\n     * Checks if `value` is classified as an `Array` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n     * @example\n     *\n     * _.isArray([1, 2, 3]);\n     * // => true\n     *\n     * _.isArray(document.body.children);\n     * // => false\n     *\n     * _.isArray('abc');\n     * // => false\n     *\n     * _.isArray(_.noop);\n     * // => false\n     */\n    var isArray = Array.isArray;\n\n    /**\n     * Checks if `value` is classified as an `ArrayBuffer` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.3.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.\n     * @example\n     *\n     * _.isArrayBuffer(new ArrayBuffer(2));\n     * // => true\n     *\n     * _.isArrayBuffer(new Array(2));\n     * // => false\n     */\n    var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;\n\n    /**\n     * Checks if `value` is array-like. A value is considered array-like if it's\n     * not a function and has a `value.length` that's an integer greater than or\n     * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n     * @example\n     *\n     * _.isArrayLike([1, 2, 3]);\n     * // => true\n     *\n     * _.isArrayLike(document.body.children);\n     * // => true\n     *\n     * _.isArrayLike('abc');\n     * // => true\n     *\n     * _.isArrayLike(_.noop);\n     * // => false\n     */\n    function isArrayLike(value) {\n      return value != null && isLength(value.length) && !isFunction(value);\n    }\n\n    /**\n     * This method is like `_.isArrayLike` except that it also checks if `value`\n     * is an object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an array-like object,\n     *  else `false`.\n     * @example\n     *\n     * _.isArrayLikeObject([1, 2, 3]);\n     * // => true\n     *\n     * _.isArrayLikeObject(document.body.children);\n     * // => true\n     *\n     * _.isArrayLikeObject('abc');\n     * // => false\n     *\n     * _.isArrayLikeObject(_.noop);\n     * // => false\n     */\n    function isArrayLikeObject(value) {\n      return isObjectLike(value) && isArrayLike(value);\n    }\n\n    /**\n     * Checks if `value` is classified as a boolean primitive or object.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.\n     * @example\n     *\n     * _.isBoolean(false);\n     * // => true\n     *\n     * _.isBoolean(null);\n     * // => false\n     */\n    function isBoolean(value) {\n      return value === true || value === false ||\n        (isObjectLike(value) && baseGetTag(value) == boolTag);\n    }\n\n    /**\n     * Checks if `value` is a buffer.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.3.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n     * @example\n     *\n     * _.isBuffer(new Buffer(2));\n     * // => true\n     *\n     * _.isBuffer(new Uint8Array(2));\n     * // => false\n     */\n    var isBuffer = nativeIsBuffer || stubFalse;\n\n    /**\n     * Checks if `value` is classified as a `Date` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.\n     * @example\n     *\n     * _.isDate(new Date);\n     * // => true\n     *\n     * _.isDate('Mon April 23 2012');\n     * // => false\n     */\n    var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;\n\n    /**\n     * Checks if `value` is likely a DOM element.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.\n     * @example\n     *\n     * _.isElement(document.body);\n     * // => true\n     *\n     * _.isElement('<body>');\n     * // => false\n     */\n    function isElement(value) {\n      return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);\n    }\n\n    /**\n     * Checks if `value` is an empty object, collection, map, or set.\n     *\n     * Objects are considered empty if they have no own enumerable string keyed\n     * properties.\n     *\n     * Array-like values such as `arguments` objects, arrays, buffers, strings, or\n     * jQuery-like collections are considered empty if they have a `length` of `0`.\n     * Similarly, maps and sets are considered empty if they have a `size` of `0`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is empty, else `false`.\n     * @example\n     *\n     * _.isEmpty(null);\n     * // => true\n     *\n     * _.isEmpty(true);\n     * // => true\n     *\n     * _.isEmpty(1);\n     * // => true\n     *\n     * _.isEmpty([1, 2, 3]);\n     * // => false\n     *\n     * _.isEmpty({ 'a': 1 });\n     * // => false\n     */\n    function isEmpty(value) {\n      if (value == null) {\n        return true;\n      }\n      if (isArrayLike(value) &&\n          (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||\n            isBuffer(value) || isTypedArray(value) || isArguments(value))) {\n        return !value.length;\n      }\n      var tag = getTag(value);\n      if (tag == mapTag || tag == setTag) {\n        return !value.size;\n      }\n      if (isPrototype(value)) {\n        return !baseKeys(value).length;\n      }\n      for (var key in value) {\n        if (hasOwnProperty.call(value, key)) {\n          return false;\n        }\n      }\n      return true;\n    }\n\n    /**\n     * Performs a deep comparison between two values to determine if they are\n     * equivalent.\n     *\n     * **Note:** This method supports comparing arrays, array buffers, booleans,\n     * date objects, error objects, maps, numbers, `Object` objects, regexes,\n     * sets, strings, symbols, and typed arrays. `Object` objects are compared\n     * by their own, not inherited, enumerable properties. Functions and DOM\n     * nodes are compared by strict equality, i.e. `===`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n     * @example\n     *\n     * var object = { 'a': 1 };\n     * var other = { 'a': 1 };\n     *\n     * _.isEqual(object, other);\n     * // => true\n     *\n     * object === other;\n     * // => false\n     */\n    function isEqual(value, other) {\n      return baseIsEqual(value, other);\n    }\n\n    /**\n     * This method is like `_.isEqual` except that it accepts `customizer` which\n     * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n     * are handled by the method instead. The `customizer` is invoked with up to\n     * six arguments: (objValue, othValue [, index|key, object, other, stack]).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @param {Function} [customizer] The function to customize comparisons.\n     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n     * @example\n     *\n     * function isGreeting(value) {\n     *   return /^h(?:i|ello)$/.test(value);\n     * }\n     *\n     * function customizer(objValue, othValue) {\n     *   if (isGreeting(objValue) && isGreeting(othValue)) {\n     *     return true;\n     *   }\n     * }\n     *\n     * var array = ['hello', 'goodbye'];\n     * var other = ['hi', 'goodbye'];\n     *\n     * _.isEqualWith(array, other, customizer);\n     * // => true\n     */\n    function isEqualWith(value, other, customizer) {\n      customizer = typeof customizer == 'function' ? customizer : undefined;\n      var result = customizer ? customizer(value, other) : undefined;\n      return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;\n    }\n\n    /**\n     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,\n     * `SyntaxError`, `TypeError`, or `URIError` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.\n     * @example\n     *\n     * _.isError(new Error);\n     * // => true\n     *\n     * _.isError(Error);\n     * // => false\n     */\n    function isError(value) {\n      if (!isObjectLike(value)) {\n        return false;\n      }\n      var tag = baseGetTag(value);\n      return tag == errorTag || tag == domExcTag ||\n        (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));\n    }\n\n    /**\n     * Checks if `value` is a finite primitive number.\n     *\n     * **Note:** This method is based on\n     * [`Number.isFinite`](https://mdn.io/Number/isFinite).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.\n     * @example\n     *\n     * _.isFinite(3);\n     * // => true\n     *\n     * _.isFinite(Number.MIN_VALUE);\n     * // => true\n     *\n     * _.isFinite(Infinity);\n     * // => false\n     *\n     * _.isFinite('3');\n     * // => false\n     */\n    function isFinite(value) {\n      return typeof value == 'number' && nativeIsFinite(value);\n    }\n\n    /**\n     * Checks if `value` is classified as a `Function` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n     * @example\n     *\n     * _.isFunction(_);\n     * // => true\n     *\n     * _.isFunction(/abc/);\n     * // => false\n     */\n    function isFunction(value) {\n      if (!isObject(value)) {\n        return false;\n      }\n      // The use of `Object#toString` avoids issues with the `typeof` operator\n      // in Safari 9 which returns 'object' for typed arrays and other constructors.\n      var tag = baseGetTag(value);\n      return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n    }\n\n    /**\n     * Checks if `value` is an integer.\n     *\n     * **Note:** This method is based on\n     * [`Number.isInteger`](https://mdn.io/Number/isInteger).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an integer, else `false`.\n     * @example\n     *\n     * _.isInteger(3);\n     * // => true\n     *\n     * _.isInteger(Number.MIN_VALUE);\n     * // => false\n     *\n     * _.isInteger(Infinity);\n     * // => false\n     *\n     * _.isInteger('3');\n     * // => false\n     */\n    function isInteger(value) {\n      return typeof value == 'number' && value == toInteger(value);\n    }\n\n    /**\n     * Checks if `value` is a valid array-like length.\n     *\n     * **Note:** This method is loosely based on\n     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n     * @example\n     *\n     * _.isLength(3);\n     * // => true\n     *\n     * _.isLength(Number.MIN_VALUE);\n     * // => false\n     *\n     * _.isLength(Infinity);\n     * // => false\n     *\n     * _.isLength('3');\n     * // => false\n     */\n    function isLength(value) {\n      return typeof value == 'number' &&\n        value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n    }\n\n    /**\n     * Checks if `value` is the\n     * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n     * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n     * @example\n     *\n     * _.isObject({});\n     * // => true\n     *\n     * _.isObject([1, 2, 3]);\n     * // => true\n     *\n     * _.isObject(_.noop);\n     * // => true\n     *\n     * _.isObject(null);\n     * // => false\n     */\n    function isObject(value) {\n      var type = typeof value;\n      return value != null && (type == 'object' || type == 'function');\n    }\n\n    /**\n     * Checks if `value` is object-like. A value is object-like if it's not `null`\n     * and has a `typeof` result of \"object\".\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n     * @example\n     *\n     * _.isObjectLike({});\n     * // => true\n     *\n     * _.isObjectLike([1, 2, 3]);\n     * // => true\n     *\n     * _.isObjectLike(_.noop);\n     * // => false\n     *\n     * _.isObjectLike(null);\n     * // => false\n     */\n    function isObjectLike(value) {\n      return value != null && typeof value == 'object';\n    }\n\n    /**\n     * Checks if `value` is classified as a `Map` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.3.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n     * @example\n     *\n     * _.isMap(new Map);\n     * // => true\n     *\n     * _.isMap(new WeakMap);\n     * // => false\n     */\n    var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;\n\n    /**\n     * Performs a partial deep comparison between `object` and `source` to\n     * determine if `object` contains equivalent property values.\n     *\n     * **Note:** This method is equivalent to `_.matches` when `source` is\n     * partially applied.\n     *\n     * Partial comparisons will match empty array and empty object `source`\n     * values against any array or object value, respectively. See `_.isEqual`\n     * for a list of supported value comparisons.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Lang\n     * @param {Object} object The object to inspect.\n     * @param {Object} source The object of property values to match.\n     * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': 2 };\n     *\n     * _.isMatch(object, { 'b': 2 });\n     * // => true\n     *\n     * _.isMatch(object, { 'b': 1 });\n     * // => false\n     */\n    function isMatch(object, source) {\n      return object === source || baseIsMatch(object, source, getMatchData(source));\n    }\n\n    /**\n     * This method is like `_.isMatch` except that it accepts `customizer` which\n     * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n     * are handled by the method instead. The `customizer` is invoked with five\n     * arguments: (objValue, srcValue, index|key, object, source).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {Object} object The object to inspect.\n     * @param {Object} source The object of property values to match.\n     * @param {Function} [customizer] The function to customize comparisons.\n     * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n     * @example\n     *\n     * function isGreeting(value) {\n     *   return /^h(?:i|ello)$/.test(value);\n     * }\n     *\n     * function customizer(objValue, srcValue) {\n     *   if (isGreeting(objValue) && isGreeting(srcValue)) {\n     *     return true;\n     *   }\n     * }\n     *\n     * var object = { 'greeting': 'hello' };\n     * var source = { 'greeting': 'hi' };\n     *\n     * _.isMatchWith(object, source, customizer);\n     * // => true\n     */\n    function isMatchWith(object, source, customizer) {\n      customizer = typeof customizer == 'function' ? customizer : undefined;\n      return baseIsMatch(object, source, getMatchData(source), customizer);\n    }\n\n    /**\n     * Checks if `value` is `NaN`.\n     *\n     * **Note:** This method is based on\n     * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as\n     * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for\n     * `undefined` and other non-number values.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.\n     * @example\n     *\n     * _.isNaN(NaN);\n     * // => true\n     *\n     * _.isNaN(new Number(NaN));\n     * // => true\n     *\n     * isNaN(undefined);\n     * // => true\n     *\n     * _.isNaN(undefined);\n     * // => false\n     */\n    function isNaN(value) {\n      // An `NaN` primitive is the only value that is not equal to itself.\n      // Perform the `toStringTag` check first to avoid errors with some\n      // ActiveX objects in IE.\n      return isNumber(value) && value != +value;\n    }\n\n    /**\n     * Checks if `value` is a pristine native function.\n     *\n     * **Note:** This method can't reliably detect native functions in the presence\n     * of the core-js package because core-js circumvents this kind of detection.\n     * Despite multiple requests, the core-js maintainer has made it clear: any\n     * attempt to fix the detection will be obstructed. As a result, we're left\n     * with little choice but to throw an error. Unfortunately, this also affects\n     * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),\n     * which rely on core-js.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a native function,\n     *  else `false`.\n     * @example\n     *\n     * _.isNative(Array.prototype.push);\n     * // => true\n     *\n     * _.isNative(_);\n     * // => false\n     */\n    function isNative(value) {\n      if (isMaskable(value)) {\n        throw new Error(CORE_ERROR_TEXT);\n      }\n      return baseIsNative(value);\n    }\n\n    /**\n     * Checks if `value` is `null`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.\n     * @example\n     *\n     * _.isNull(null);\n     * // => true\n     *\n     * _.isNull(void 0);\n     * // => false\n     */\n    function isNull(value) {\n      return value === null;\n    }\n\n    /**\n     * Checks if `value` is `null` or `undefined`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is nullish, else `false`.\n     * @example\n     *\n     * _.isNil(null);\n     * // => true\n     *\n     * _.isNil(void 0);\n     * // => true\n     *\n     * _.isNil(NaN);\n     * // => false\n     */\n    function isNil(value) {\n      return value == null;\n    }\n\n    /**\n     * Checks if `value` is classified as a `Number` primitive or object.\n     *\n     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are\n     * classified as numbers, use the `_.isFinite` method.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a number, else `false`.\n     * @example\n     *\n     * _.isNumber(3);\n     * // => true\n     *\n     * _.isNumber(Number.MIN_VALUE);\n     * // => true\n     *\n     * _.isNumber(Infinity);\n     * // => true\n     *\n     * _.isNumber('3');\n     * // => false\n     */\n    function isNumber(value) {\n      return typeof value == 'number' ||\n        (isObjectLike(value) && baseGetTag(value) == numberTag);\n    }\n\n    /**\n     * Checks if `value` is a plain object, that is, an object created by the\n     * `Object` constructor or one with a `[[Prototype]]` of `null`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.8.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     * }\n     *\n     * _.isPlainObject(new Foo);\n     * // => false\n     *\n     * _.isPlainObject([1, 2, 3]);\n     * // => false\n     *\n     * _.isPlainObject({ 'x': 0, 'y': 0 });\n     * // => true\n     *\n     * _.isPlainObject(Object.create(null));\n     * // => true\n     */\n    function isPlainObject(value) {\n      if (!isObjectLike(value) || baseGetTag(value) != objectTag) {\n        return false;\n      }\n      var proto = getPrototype(value);\n      if (proto === null) {\n        return true;\n      }\n      var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;\n      return typeof Ctor == 'function' && Ctor instanceof Ctor &&\n        funcToString.call(Ctor) == objectCtorString;\n    }\n\n    /**\n     * Checks if `value` is classified as a `RegExp` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.\n     * @example\n     *\n     * _.isRegExp(/abc/);\n     * // => true\n     *\n     * _.isRegExp('/abc/');\n     * // => false\n     */\n    var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;\n\n    /**\n     * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754\n     * double precision number which isn't the result of a rounded unsafe integer.\n     *\n     * **Note:** This method is based on\n     * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.\n     * @example\n     *\n     * _.isSafeInteger(3);\n     * // => true\n     *\n     * _.isSafeInteger(Number.MIN_VALUE);\n     * // => false\n     *\n     * _.isSafeInteger(Infinity);\n     * // => false\n     *\n     * _.isSafeInteger('3');\n     * // => false\n     */\n    function isSafeInteger(value) {\n      return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;\n    }\n\n    /**\n     * Checks if `value` is classified as a `Set` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.3.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n     * @example\n     *\n     * _.isSet(new Set);\n     * // => true\n     *\n     * _.isSet(new WeakSet);\n     * // => false\n     */\n    var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;\n\n    /**\n     * Checks if `value` is classified as a `String` primitive or object.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a string, else `false`.\n     * @example\n     *\n     * _.isString('abc');\n     * // => true\n     *\n     * _.isString(1);\n     * // => false\n     */\n    function isString(value) {\n      return typeof value == 'string' ||\n        (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);\n    }\n\n    /**\n     * Checks if `value` is classified as a `Symbol` primitive or object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n     * @example\n     *\n     * _.isSymbol(Symbol.iterator);\n     * // => true\n     *\n     * _.isSymbol('abc');\n     * // => false\n     */\n    function isSymbol(value) {\n      return typeof value == 'symbol' ||\n        (isObjectLike(value) && baseGetTag(value) == symbolTag);\n    }\n\n    /**\n     * Checks if `value` is classified as a typed array.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n     * @example\n     *\n     * _.isTypedArray(new Uint8Array);\n     * // => true\n     *\n     * _.isTypedArray([]);\n     * // => false\n     */\n    var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\n    /**\n     * Checks if `value` is `undefined`.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.\n     * @example\n     *\n     * _.isUndefined(void 0);\n     * // => true\n     *\n     * _.isUndefined(null);\n     * // => false\n     */\n    function isUndefined(value) {\n      return value === undefined;\n    }\n\n    /**\n     * Checks if `value` is classified as a `WeakMap` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.3.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.\n     * @example\n     *\n     * _.isWeakMap(new WeakMap);\n     * // => true\n     *\n     * _.isWeakMap(new Map);\n     * // => false\n     */\n    function isWeakMap(value) {\n      return isObjectLike(value) && getTag(value) == weakMapTag;\n    }\n\n    /**\n     * Checks if `value` is classified as a `WeakSet` object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.3.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.\n     * @example\n     *\n     * _.isWeakSet(new WeakSet);\n     * // => true\n     *\n     * _.isWeakSet(new Set);\n     * // => false\n     */\n    function isWeakSet(value) {\n      return isObjectLike(value) && baseGetTag(value) == weakSetTag;\n    }\n\n    /**\n     * Checks if `value` is less than `other`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.9.0\n     * @category Lang\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if `value` is less than `other`,\n     *  else `false`.\n     * @see _.gt\n     * @example\n     *\n     * _.lt(1, 3);\n     * // => true\n     *\n     * _.lt(3, 3);\n     * // => false\n     *\n     * _.lt(3, 1);\n     * // => false\n     */\n    var lt = createRelationalOperation(baseLt);\n\n    /**\n     * Checks if `value` is less than or equal to `other`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.9.0\n     * @category Lang\n     * @param {*} value The value to compare.\n     * @param {*} other The other value to compare.\n     * @returns {boolean} Returns `true` if `value` is less than or equal to\n     *  `other`, else `false`.\n     * @see _.gte\n     * @example\n     *\n     * _.lte(1, 3);\n     * // => true\n     *\n     * _.lte(3, 3);\n     * // => true\n     *\n     * _.lte(3, 1);\n     * // => false\n     */\n    var lte = createRelationalOperation(function(value, other) {\n      return value <= other;\n    });\n\n    /**\n     * Converts `value` to an array.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Lang\n     * @param {*} value The value to convert.\n     * @returns {Array} Returns the converted array.\n     * @example\n     *\n     * _.toArray({ 'a': 1, 'b': 2 });\n     * // => [1, 2]\n     *\n     * _.toArray('abc');\n     * // => ['a', 'b', 'c']\n     *\n     * _.toArray(1);\n     * // => []\n     *\n     * _.toArray(null);\n     * // => []\n     */\n    function toArray(value) {\n      if (!value) {\n        return [];\n      }\n      if (isArrayLike(value)) {\n        return isString(value) ? stringToArray(value) : copyArray(value);\n      }\n      if (symIterator && value[symIterator]) {\n        return iteratorToArray(value[symIterator]());\n      }\n      var tag = getTag(value),\n          func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);\n\n      return func(value);\n    }\n\n    /**\n     * Converts `value` to a finite number.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.12.0\n     * @category Lang\n     * @param {*} value The value to convert.\n     * @returns {number} Returns the converted number.\n     * @example\n     *\n     * _.toFinite(3.2);\n     * // => 3.2\n     *\n     * _.toFinite(Number.MIN_VALUE);\n     * // => 5e-324\n     *\n     * _.toFinite(Infinity);\n     * // => 1.7976931348623157e+308\n     *\n     * _.toFinite('3.2');\n     * // => 3.2\n     */\n    function toFinite(value) {\n      if (!value) {\n        return value === 0 ? value : 0;\n      }\n      value = toNumber(value);\n      if (value === INFINITY || value === -INFINITY) {\n        var sign = (value < 0 ? -1 : 1);\n        return sign * MAX_INTEGER;\n      }\n      return value === value ? value : 0;\n    }\n\n    /**\n     * Converts `value` to an integer.\n     *\n     * **Note:** This method is loosely based on\n     * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to convert.\n     * @returns {number} Returns the converted integer.\n     * @example\n     *\n     * _.toInteger(3.2);\n     * // => 3\n     *\n     * _.toInteger(Number.MIN_VALUE);\n     * // => 0\n     *\n     * _.toInteger(Infinity);\n     * // => 1.7976931348623157e+308\n     *\n     * _.toInteger('3.2');\n     * // => 3\n     */\n    function toInteger(value) {\n      var result = toFinite(value),\n          remainder = result % 1;\n\n      return result === result ? (remainder ? result - remainder : result) : 0;\n    }\n\n    /**\n     * Converts `value` to an integer suitable for use as the length of an\n     * array-like object.\n     *\n     * **Note:** This method is based on\n     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to convert.\n     * @returns {number} Returns the converted integer.\n     * @example\n     *\n     * _.toLength(3.2);\n     * // => 3\n     *\n     * _.toLength(Number.MIN_VALUE);\n     * // => 0\n     *\n     * _.toLength(Infinity);\n     * // => 4294967295\n     *\n     * _.toLength('3.2');\n     * // => 3\n     */\n    function toLength(value) {\n      return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;\n    }\n\n    /**\n     * Converts `value` to a number.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to process.\n     * @returns {number} Returns the number.\n     * @example\n     *\n     * _.toNumber(3.2);\n     * // => 3.2\n     *\n     * _.toNumber(Number.MIN_VALUE);\n     * // => 5e-324\n     *\n     * _.toNumber(Infinity);\n     * // => Infinity\n     *\n     * _.toNumber('3.2');\n     * // => 3.2\n     */\n    function toNumber(value) {\n      if (typeof value == 'number') {\n        return value;\n      }\n      if (isSymbol(value)) {\n        return NAN;\n      }\n      if (isObject(value)) {\n        var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n        value = isObject(other) ? (other + '') : other;\n      }\n      if (typeof value != 'string') {\n        return value === 0 ? value : +value;\n      }\n      value = value.replace(reTrim, '');\n      var isBinary = reIsBinary.test(value);\n      return (isBinary || reIsOctal.test(value))\n        ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n        : (reIsBadHex.test(value) ? NAN : +value);\n    }\n\n    /**\n     * Converts `value` to a plain object flattening inherited enumerable string\n     * keyed properties of `value` to own properties of the plain object.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Lang\n     * @param {*} value The value to convert.\n     * @returns {Object} Returns the converted plain object.\n     * @example\n     *\n     * function Foo() {\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.assign({ 'a': 1 }, new Foo);\n     * // => { 'a': 1, 'b': 2 }\n     *\n     * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));\n     * // => { 'a': 1, 'b': 2, 'c': 3 }\n     */\n    function toPlainObject(value) {\n      return copyObject(value, keysIn(value));\n    }\n\n    /**\n     * Converts `value` to a safe integer. A safe integer can be compared and\n     * represented correctly.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to convert.\n     * @returns {number} Returns the converted integer.\n     * @example\n     *\n     * _.toSafeInteger(3.2);\n     * // => 3\n     *\n     * _.toSafeInteger(Number.MIN_VALUE);\n     * // => 0\n     *\n     * _.toSafeInteger(Infinity);\n     * // => 9007199254740991\n     *\n     * _.toSafeInteger('3.2');\n     * // => 3\n     */\n    function toSafeInteger(value) {\n      return value\n        ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)\n        : (value === 0 ? value : 0);\n    }\n\n    /**\n     * Converts `value` to a string. An empty string is returned for `null`\n     * and `undefined` values. The sign of `-0` is preserved.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to convert.\n     * @returns {string} Returns the converted string.\n     * @example\n     *\n     * _.toString(null);\n     * // => ''\n     *\n     * _.toString(-0);\n     * // => '-0'\n     *\n     * _.toString([1, 2, 3]);\n     * // => '1,2,3'\n     */\n    function toString(value) {\n      return value == null ? '' : baseToString(value);\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Assigns own enumerable string keyed properties of source objects to the\n     * destination object. Source objects are applied from left to right.\n     * Subsequent sources overwrite property assignments of previous sources.\n     *\n     * **Note:** This method mutates `object` and is loosely based on\n     * [`Object.assign`](https://mdn.io/Object/assign).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.10.0\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} [sources] The source objects.\n     * @returns {Object} Returns `object`.\n     * @see _.assignIn\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     * }\n     *\n     * function Bar() {\n     *   this.c = 3;\n     * }\n     *\n     * Foo.prototype.b = 2;\n     * Bar.prototype.d = 4;\n     *\n     * _.assign({ 'a': 0 }, new Foo, new Bar);\n     * // => { 'a': 1, 'c': 3 }\n     */\n    var assign = createAssigner(function(object, source) {\n      if (isPrototype(source) || isArrayLike(source)) {\n        copyObject(source, keys(source), object);\n        return;\n      }\n      for (var key in source) {\n        if (hasOwnProperty.call(source, key)) {\n          assignValue(object, key, source[key]);\n        }\n      }\n    });\n\n    /**\n     * This method is like `_.assign` except that it iterates over own and\n     * inherited source properties.\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @alias extend\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} [sources] The source objects.\n     * @returns {Object} Returns `object`.\n     * @see _.assign\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     * }\n     *\n     * function Bar() {\n     *   this.c = 3;\n     * }\n     *\n     * Foo.prototype.b = 2;\n     * Bar.prototype.d = 4;\n     *\n     * _.assignIn({ 'a': 0 }, new Foo, new Bar);\n     * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }\n     */\n    var assignIn = createAssigner(function(object, source) {\n      copyObject(source, keysIn(source), object);\n    });\n\n    /**\n     * This method is like `_.assignIn` except that it accepts `customizer`\n     * which is invoked to produce the assigned values. If `customizer` returns\n     * `undefined`, assignment is handled by the method instead. The `customizer`\n     * is invoked with five arguments: (objValue, srcValue, key, object, source).\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @alias extendWith\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} sources The source objects.\n     * @param {Function} [customizer] The function to customize assigned values.\n     * @returns {Object} Returns `object`.\n     * @see _.assignWith\n     * @example\n     *\n     * function customizer(objValue, srcValue) {\n     *   return _.isUndefined(objValue) ? srcValue : objValue;\n     * }\n     *\n     * var defaults = _.partialRight(_.assignInWith, customizer);\n     *\n     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n     * // => { 'a': 1, 'b': 2 }\n     */\n    var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {\n      copyObject(source, keysIn(source), object, customizer);\n    });\n\n    /**\n     * This method is like `_.assign` except that it accepts `customizer`\n     * which is invoked to produce the assigned values. If `customizer` returns\n     * `undefined`, assignment is handled by the method instead. The `customizer`\n     * is invoked with five arguments: (objValue, srcValue, key, object, source).\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} sources The source objects.\n     * @param {Function} [customizer] The function to customize assigned values.\n     * @returns {Object} Returns `object`.\n     * @see _.assignInWith\n     * @example\n     *\n     * function customizer(objValue, srcValue) {\n     *   return _.isUndefined(objValue) ? srcValue : objValue;\n     * }\n     *\n     * var defaults = _.partialRight(_.assignWith, customizer);\n     *\n     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n     * // => { 'a': 1, 'b': 2 }\n     */\n    var assignWith = createAssigner(function(object, source, srcIndex, customizer) {\n      copyObject(source, keys(source), object, customizer);\n    });\n\n    /**\n     * Creates an array of values corresponding to `paths` of `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.0.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {...(string|string[])} [paths] The property paths to pick.\n     * @returns {Array} Returns the picked values.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };\n     *\n     * _.at(object, ['a[0].b.c', 'a[1]']);\n     * // => [3, 4]\n     */\n    var at = flatRest(baseAt);\n\n    /**\n     * Creates an object that inherits from the `prototype` object. If a\n     * `properties` object is given, its own enumerable string keyed properties\n     * are assigned to the created object.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.3.0\n     * @category Object\n     * @param {Object} prototype The object to inherit from.\n     * @param {Object} [properties] The properties to assign to the object.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * function Shape() {\n     *   this.x = 0;\n     *   this.y = 0;\n     * }\n     *\n     * function Circle() {\n     *   Shape.call(this);\n     * }\n     *\n     * Circle.prototype = _.create(Shape.prototype, {\n     *   'constructor': Circle\n     * });\n     *\n     * var circle = new Circle;\n     * circle instanceof Circle;\n     * // => true\n     *\n     * circle instanceof Shape;\n     * // => true\n     */\n    function create(prototype, properties) {\n      var result = baseCreate(prototype);\n      return properties == null ? result : baseAssign(result, properties);\n    }\n\n    /**\n     * Assigns own and inherited enumerable string keyed properties of source\n     * objects to the destination object for all destination properties that\n     * resolve to `undefined`. Source objects are applied from left to right.\n     * Once a property is set, additional values of the same property are ignored.\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} [sources] The source objects.\n     * @returns {Object} Returns `object`.\n     * @see _.defaultsDeep\n     * @example\n     *\n     * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n     * // => { 'a': 1, 'b': 2 }\n     */\n    var defaults = baseRest(function(args) {\n      args.push(undefined, customDefaultsAssignIn);\n      return apply(assignInWith, undefined, args);\n    });\n\n    /**\n     * This method is like `_.defaults` except that it recursively assigns\n     * default properties.\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.10.0\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} [sources] The source objects.\n     * @returns {Object} Returns `object`.\n     * @see _.defaults\n     * @example\n     *\n     * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });\n     * // => { 'a': { 'b': 2, 'c': 3 } }\n     */\n    var defaultsDeep = baseRest(function(args) {\n      args.push(undefined, customDefaultsMerge);\n      return apply(mergeWith, undefined, args);\n    });\n\n    /**\n     * This method is like `_.find` except that it returns the key of the first\n     * element `predicate` returns truthy for instead of the element itself.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.1.0\n     * @category Object\n     * @param {Object} object The object to inspect.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {string|undefined} Returns the key of the matched element,\n     *  else `undefined`.\n     * @example\n     *\n     * var users = {\n     *   'barney':  { 'age': 36, 'active': true },\n     *   'fred':    { 'age': 40, 'active': false },\n     *   'pebbles': { 'age': 1,  'active': true }\n     * };\n     *\n     * _.findKey(users, function(o) { return o.age < 40; });\n     * // => 'barney' (iteration order is not guaranteed)\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.findKey(users, { 'age': 1, 'active': true });\n     * // => 'pebbles'\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.findKey(users, ['active', false]);\n     * // => 'fred'\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.findKey(users, 'active');\n     * // => 'barney'\n     */\n    function findKey(object, predicate) {\n      return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);\n    }\n\n    /**\n     * This method is like `_.findKey` except that it iterates over elements of\n     * a collection in the opposite order.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Object\n     * @param {Object} object The object to inspect.\n     * @param {Function} [predicate=_.identity] The function invoked per iteration.\n     * @returns {string|undefined} Returns the key of the matched element,\n     *  else `undefined`.\n     * @example\n     *\n     * var users = {\n     *   'barney':  { 'age': 36, 'active': true },\n     *   'fred':    { 'age': 40, 'active': false },\n     *   'pebbles': { 'age': 1,  'active': true }\n     * };\n     *\n     * _.findLastKey(users, function(o) { return o.age < 40; });\n     * // => returns 'pebbles' assuming `_.findKey` returns 'barney'\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.findLastKey(users, { 'age': 36, 'active': true });\n     * // => 'barney'\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.findLastKey(users, ['active', false]);\n     * // => 'fred'\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.findLastKey(users, 'active');\n     * // => 'pebbles'\n     */\n    function findLastKey(object, predicate) {\n      return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);\n    }\n\n    /**\n     * Iterates over own and inherited enumerable string keyed properties of an\n     * object and invokes `iteratee` for each property. The iteratee is invoked\n     * with three arguments: (value, key, object). Iteratee functions may exit\n     * iteration early by explicitly returning `false`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.3.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Object} Returns `object`.\n     * @see _.forInRight\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.forIn(new Foo, function(value, key) {\n     *   console.log(key);\n     * });\n     * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).\n     */\n    function forIn(object, iteratee) {\n      return object == null\n        ? object\n        : baseFor(object, getIteratee(iteratee, 3), keysIn);\n    }\n\n    /**\n     * This method is like `_.forIn` except that it iterates over properties of\n     * `object` in the opposite order.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Object} Returns `object`.\n     * @see _.forIn\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.forInRight(new Foo, function(value, key) {\n     *   console.log(key);\n     * });\n     * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.\n     */\n    function forInRight(object, iteratee) {\n      return object == null\n        ? object\n        : baseForRight(object, getIteratee(iteratee, 3), keysIn);\n    }\n\n    /**\n     * Iterates over own enumerable string keyed properties of an object and\n     * invokes `iteratee` for each property. The iteratee is invoked with three\n     * arguments: (value, key, object). Iteratee functions may exit iteration\n     * early by explicitly returning `false`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.3.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Object} Returns `object`.\n     * @see _.forOwnRight\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.forOwn(new Foo, function(value, key) {\n     *   console.log(key);\n     * });\n     * // => Logs 'a' then 'b' (iteration order is not guaranteed).\n     */\n    function forOwn(object, iteratee) {\n      return object && baseForOwn(object, getIteratee(iteratee, 3));\n    }\n\n    /**\n     * This method is like `_.forOwn` except that it iterates over properties of\n     * `object` in the opposite order.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.0.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Object} Returns `object`.\n     * @see _.forOwn\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.forOwnRight(new Foo, function(value, key) {\n     *   console.log(key);\n     * });\n     * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.\n     */\n    function forOwnRight(object, iteratee) {\n      return object && baseForOwnRight(object, getIteratee(iteratee, 3));\n    }\n\n    /**\n     * Creates an array of function property names from own enumerable properties\n     * of `object`.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The object to inspect.\n     * @returns {Array} Returns the function names.\n     * @see _.functionsIn\n     * @example\n     *\n     * function Foo() {\n     *   this.a = _.constant('a');\n     *   this.b = _.constant('b');\n     * }\n     *\n     * Foo.prototype.c = _.constant('c');\n     *\n     * _.functions(new Foo);\n     * // => ['a', 'b']\n     */\n    function functions(object) {\n      return object == null ? [] : baseFunctions(object, keys(object));\n    }\n\n    /**\n     * Creates an array of function property names from own and inherited\n     * enumerable properties of `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The object to inspect.\n     * @returns {Array} Returns the function names.\n     * @see _.functions\n     * @example\n     *\n     * function Foo() {\n     *   this.a = _.constant('a');\n     *   this.b = _.constant('b');\n     * }\n     *\n     * Foo.prototype.c = _.constant('c');\n     *\n     * _.functionsIn(new Foo);\n     * // => ['a', 'b', 'c']\n     */\n    function functionsIn(object) {\n      return object == null ? [] : baseFunctions(object, keysIn(object));\n    }\n\n    /**\n     * Gets the value at `path` of `object`. If the resolved value is\n     * `undefined`, the `defaultValue` is returned in its place.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.7.0\n     * @category Object\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path of the property to get.\n     * @param {*} [defaultValue] The value returned for `undefined` resolved values.\n     * @returns {*} Returns the resolved value.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n     *\n     * _.get(object, 'a[0].b.c');\n     * // => 3\n     *\n     * _.get(object, ['a', '0', 'b', 'c']);\n     * // => 3\n     *\n     * _.get(object, 'a.b.c', 'default');\n     * // => 'default'\n     */\n    function get(object, path, defaultValue) {\n      var result = object == null ? undefined : baseGet(object, path);\n      return result === undefined ? defaultValue : result;\n    }\n\n    /**\n     * Checks if `path` is a direct property of `object`.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path to check.\n     * @returns {boolean} Returns `true` if `path` exists, else `false`.\n     * @example\n     *\n     * var object = { 'a': { 'b': 2 } };\n     * var other = _.create({ 'a': _.create({ 'b': 2 }) });\n     *\n     * _.has(object, 'a');\n     * // => true\n     *\n     * _.has(object, 'a.b');\n     * // => true\n     *\n     * _.has(object, ['a', 'b']);\n     * // => true\n     *\n     * _.has(other, 'a');\n     * // => false\n     */\n    function has(object, path) {\n      return object != null && hasPath(object, path, baseHas);\n    }\n\n    /**\n     * Checks if `path` is a direct or inherited property of `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path to check.\n     * @returns {boolean} Returns `true` if `path` exists, else `false`.\n     * @example\n     *\n     * var object = _.create({ 'a': _.create({ 'b': 2 }) });\n     *\n     * _.hasIn(object, 'a');\n     * // => true\n     *\n     * _.hasIn(object, 'a.b');\n     * // => true\n     *\n     * _.hasIn(object, ['a', 'b']);\n     * // => true\n     *\n     * _.hasIn(object, 'b');\n     * // => false\n     */\n    function hasIn(object, path) {\n      return object != null && hasPath(object, path, baseHasIn);\n    }\n\n    /**\n     * Creates an object composed of the inverted keys and values of `object`.\n     * If `object` contains duplicate values, subsequent values overwrite\n     * property assignments of previous values.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.7.0\n     * @category Object\n     * @param {Object} object The object to invert.\n     * @returns {Object} Returns the new inverted object.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': 2, 'c': 1 };\n     *\n     * _.invert(object);\n     * // => { '1': 'c', '2': 'b' }\n     */\n    var invert = createInverter(function(result, value, key) {\n      result[value] = key;\n    }, constant(identity));\n\n    /**\n     * This method is like `_.invert` except that the inverted object is generated\n     * from the results of running each element of `object` thru `iteratee`. The\n     * corresponding inverted value of each inverted key is an array of keys\n     * responsible for generating the inverted value. The iteratee is invoked\n     * with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.1.0\n     * @category Object\n     * @param {Object} object The object to invert.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {Object} Returns the new inverted object.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': 2, 'c': 1 };\n     *\n     * _.invertBy(object);\n     * // => { '1': ['a', 'c'], '2': ['b'] }\n     *\n     * _.invertBy(object, function(value) {\n     *   return 'group' + value;\n     * });\n     * // => { 'group1': ['a', 'c'], 'group2': ['b'] }\n     */\n    var invertBy = createInverter(function(result, value, key) {\n      if (hasOwnProperty.call(result, value)) {\n        result[value].push(key);\n      } else {\n        result[value] = [key];\n      }\n    }, getIteratee);\n\n    /**\n     * Invokes the method at `path` of `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path of the method to invoke.\n     * @param {...*} [args] The arguments to invoke the method with.\n     * @returns {*} Returns the result of the invoked method.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };\n     *\n     * _.invoke(object, 'a[0].b.c.slice', 1, 3);\n     * // => [2, 3]\n     */\n    var invoke = baseRest(baseInvoke);\n\n    /**\n     * Creates an array of the own enumerable property names of `object`.\n     *\n     * **Note:** Non-object values are coerced to objects. See the\n     * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n     * for more details.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property names.\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.keys(new Foo);\n     * // => ['a', 'b'] (iteration order is not guaranteed)\n     *\n     * _.keys('hi');\n     * // => ['0', '1']\n     */\n    function keys(object) {\n      return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n    }\n\n    /**\n     * Creates an array of the own and inherited enumerable property names of `object`.\n     *\n     * **Note:** Non-object values are coerced to objects.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Object\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property names.\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.keysIn(new Foo);\n     * // => ['a', 'b', 'c'] (iteration order is not guaranteed)\n     */\n    function keysIn(object) {\n      return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);\n    }\n\n    /**\n     * The opposite of `_.mapValues`; this method creates an object with the\n     * same values as `object` and keys generated by running each own enumerable\n     * string keyed property of `object` thru `iteratee`. The iteratee is invoked\n     * with three arguments: (value, key, object).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.8.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Object} Returns the new mapped object.\n     * @see _.mapValues\n     * @example\n     *\n     * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {\n     *   return key + value;\n     * });\n     * // => { 'a1': 1, 'b2': 2 }\n     */\n    function mapKeys(object, iteratee) {\n      var result = {};\n      iteratee = getIteratee(iteratee, 3);\n\n      baseForOwn(object, function(value, key, object) {\n        baseAssignValue(result, iteratee(value, key, object), value);\n      });\n      return result;\n    }\n\n    /**\n     * Creates an object with the same keys as `object` and values generated\n     * by running each own enumerable string keyed property of `object` thru\n     * `iteratee`. The iteratee is invoked with three arguments:\n     * (value, key, object).\n     *\n     * @static\n     * @memberOf _\n     * @since 2.4.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Object} Returns the new mapped object.\n     * @see _.mapKeys\n     * @example\n     *\n     * var users = {\n     *   'fred':    { 'user': 'fred',    'age': 40 },\n     *   'pebbles': { 'user': 'pebbles', 'age': 1 }\n     * };\n     *\n     * _.mapValues(users, function(o) { return o.age; });\n     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.mapValues(users, 'age');\n     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)\n     */\n    function mapValues(object, iteratee) {\n      var result = {};\n      iteratee = getIteratee(iteratee, 3);\n\n      baseForOwn(object, function(value, key, object) {\n        baseAssignValue(result, key, iteratee(value, key, object));\n      });\n      return result;\n    }\n\n    /**\n     * This method is like `_.assign` except that it recursively merges own and\n     * inherited enumerable string keyed properties of source objects into the\n     * destination object. Source properties that resolve to `undefined` are\n     * skipped if a destination value exists. Array and plain object properties\n     * are merged recursively. Other objects and value types are overridden by\n     * assignment. Source objects are applied from left to right. Subsequent\n     * sources overwrite property assignments of previous sources.\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.5.0\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} [sources] The source objects.\n     * @returns {Object} Returns `object`.\n     * @example\n     *\n     * var object = {\n     *   'a': [{ 'b': 2 }, { 'd': 4 }]\n     * };\n     *\n     * var other = {\n     *   'a': [{ 'c': 3 }, { 'e': 5 }]\n     * };\n     *\n     * _.merge(object, other);\n     * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }\n     */\n    var merge = createAssigner(function(object, source, srcIndex) {\n      baseMerge(object, source, srcIndex);\n    });\n\n    /**\n     * This method is like `_.merge` except that it accepts `customizer` which\n     * is invoked to produce the merged values of the destination and source\n     * properties. If `customizer` returns `undefined`, merging is handled by the\n     * method instead. The `customizer` is invoked with six arguments:\n     * (objValue, srcValue, key, object, source, stack).\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The destination object.\n     * @param {...Object} sources The source objects.\n     * @param {Function} customizer The function to customize assigned values.\n     * @returns {Object} Returns `object`.\n     * @example\n     *\n     * function customizer(objValue, srcValue) {\n     *   if (_.isArray(objValue)) {\n     *     return objValue.concat(srcValue);\n     *   }\n     * }\n     *\n     * var object = { 'a': [1], 'b': [2] };\n     * var other = { 'a': [3], 'b': [4] };\n     *\n     * _.mergeWith(object, other, customizer);\n     * // => { 'a': [1, 3], 'b': [2, 4] }\n     */\n    var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {\n      baseMerge(object, source, srcIndex, customizer);\n    });\n\n    /**\n     * The opposite of `_.pick`; this method creates an object composed of the\n     * own and inherited enumerable property paths of `object` that are not omitted.\n     *\n     * **Note:** This method is considerably slower than `_.pick`.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The source object.\n     * @param {...(string|string[])} [paths] The property paths to omit.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': '2', 'c': 3 };\n     *\n     * _.omit(object, ['a', 'c']);\n     * // => { 'b': '2' }\n     */\n    var omit = flatRest(function(object, paths) {\n      var result = {};\n      if (object == null) {\n        return result;\n      }\n      var isDeep = false;\n      paths = arrayMap(paths, function(path) {\n        path = castPath(path, object);\n        isDeep || (isDeep = path.length > 1);\n        return path;\n      });\n      copyObject(object, getAllKeysIn(object), result);\n      if (isDeep) {\n        result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);\n      }\n      var length = paths.length;\n      while (length--) {\n        baseUnset(result, paths[length]);\n      }\n      return result;\n    });\n\n    /**\n     * The opposite of `_.pickBy`; this method creates an object composed of\n     * the own and inherited enumerable string keyed properties of `object` that\n     * `predicate` doesn't return truthy for. The predicate is invoked with two\n     * arguments: (value, key).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The source object.\n     * @param {Function} [predicate=_.identity] The function invoked per property.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': '2', 'c': 3 };\n     *\n     * _.omitBy(object, _.isNumber);\n     * // => { 'b': '2' }\n     */\n    function omitBy(object, predicate) {\n      return pickBy(object, negate(getIteratee(predicate)));\n    }\n\n    /**\n     * Creates an object composed of the picked `object` properties.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The source object.\n     * @param {...(string|string[])} [paths] The property paths to pick.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': '2', 'c': 3 };\n     *\n     * _.pick(object, ['a', 'c']);\n     * // => { 'a': 1, 'c': 3 }\n     */\n    var pick = flatRest(function(object, paths) {\n      return object == null ? {} : basePick(object, paths);\n    });\n\n    /**\n     * Creates an object composed of the `object` properties `predicate` returns\n     * truthy for. The predicate is invoked with two arguments: (value, key).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The source object.\n     * @param {Function} [predicate=_.identity] The function invoked per property.\n     * @returns {Object} Returns the new object.\n     * @example\n     *\n     * var object = { 'a': 1, 'b': '2', 'c': 3 };\n     *\n     * _.pickBy(object, _.isNumber);\n     * // => { 'a': 1, 'c': 3 }\n     */\n    function pickBy(object, predicate) {\n      if (object == null) {\n        return {};\n      }\n      var props = arrayMap(getAllKeysIn(object), function(prop) {\n        return [prop];\n      });\n      predicate = getIteratee(predicate);\n      return basePickBy(object, props, function(value, path) {\n        return predicate(value, path[0]);\n      });\n    }\n\n    /**\n     * This method is like `_.get` except that if the resolved value is a\n     * function it's invoked with the `this` binding of its parent object and\n     * its result is returned.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The object to query.\n     * @param {Array|string} path The path of the property to resolve.\n     * @param {*} [defaultValue] The value returned for `undefined` resolved values.\n     * @returns {*} Returns the resolved value.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };\n     *\n     * _.result(object, 'a[0].b.c1');\n     * // => 3\n     *\n     * _.result(object, 'a[0].b.c2');\n     * // => 4\n     *\n     * _.result(object, 'a[0].b.c3', 'default');\n     * // => 'default'\n     *\n     * _.result(object, 'a[0].b.c3', _.constant('default'));\n     * // => 'default'\n     */\n    function result(object, path, defaultValue) {\n      path = castPath(path, object);\n\n      var index = -1,\n          length = path.length;\n\n      // Ensure the loop is entered when path is empty.\n      if (!length) {\n        length = 1;\n        object = undefined;\n      }\n      while (++index < length) {\n        var value = object == null ? undefined : object[toKey(path[index])];\n        if (value === undefined) {\n          index = length;\n          value = defaultValue;\n        }\n        object = isFunction(value) ? value.call(object) : value;\n      }\n      return object;\n    }\n\n    /**\n     * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,\n     * it's created. Arrays are created for missing index properties while objects\n     * are created for all other missing properties. Use `_.setWith` to customize\n     * `path` creation.\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.7.0\n     * @category Object\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The path of the property to set.\n     * @param {*} value The value to set.\n     * @returns {Object} Returns `object`.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n     *\n     * _.set(object, 'a[0].b.c', 4);\n     * console.log(object.a[0].b.c);\n     * // => 4\n     *\n     * _.set(object, ['x', '0', 'y', 'z'], 5);\n     * console.log(object.x[0].y.z);\n     * // => 5\n     */\n    function set(object, path, value) {\n      return object == null ? object : baseSet(object, path, value);\n    }\n\n    /**\n     * This method is like `_.set` except that it accepts `customizer` which is\n     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`\n     * path creation is handled by the method instead. The `customizer` is invoked\n     * with three arguments: (nsValue, key, nsObject).\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The path of the property to set.\n     * @param {*} value The value to set.\n     * @param {Function} [customizer] The function to customize assigned values.\n     * @returns {Object} Returns `object`.\n     * @example\n     *\n     * var object = {};\n     *\n     * _.setWith(object, '[0][1]', 'a', Object);\n     * // => { '0': { '1': 'a' } }\n     */\n    function setWith(object, path, value, customizer) {\n      customizer = typeof customizer == 'function' ? customizer : undefined;\n      return object == null ? object : baseSet(object, path, value, customizer);\n    }\n\n    /**\n     * Creates an array of own enumerable string keyed-value pairs for `object`\n     * which can be consumed by `_.fromPairs`. If `object` is a map or set, its\n     * entries are returned.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @alias entries\n     * @category Object\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the key-value pairs.\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.toPairs(new Foo);\n     * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)\n     */\n    var toPairs = createToPairs(keys);\n\n    /**\n     * Creates an array of own and inherited enumerable string keyed-value pairs\n     * for `object` which can be consumed by `_.fromPairs`. If `object` is a map\n     * or set, its entries are returned.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @alias entriesIn\n     * @category Object\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the key-value pairs.\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.toPairsIn(new Foo);\n     * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)\n     */\n    var toPairsIn = createToPairs(keysIn);\n\n    /**\n     * An alternative to `_.reduce`; this method transforms `object` to a new\n     * `accumulator` object which is the result of running each of its own\n     * enumerable string keyed properties thru `iteratee`, with each invocation\n     * potentially mutating the `accumulator` object. If `accumulator` is not\n     * provided, a new object with the same `[[Prototype]]` will be used. The\n     * iteratee is invoked with four arguments: (accumulator, value, key, object).\n     * Iteratee functions may exit iteration early by explicitly returning `false`.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.3.0\n     * @category Object\n     * @param {Object} object The object to iterate over.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @param {*} [accumulator] The custom accumulator value.\n     * @returns {*} Returns the accumulated value.\n     * @example\n     *\n     * _.transform([2, 3, 4], function(result, n) {\n     *   result.push(n *= n);\n     *   return n % 2 == 0;\n     * }, []);\n     * // => [4, 9]\n     *\n     * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {\n     *   (result[value] || (result[value] = [])).push(key);\n     * }, {});\n     * // => { '1': ['a', 'c'], '2': ['b'] }\n     */\n    function transform(object, iteratee, accumulator) {\n      var isArr = isArray(object),\n          isArrLike = isArr || isBuffer(object) || isTypedArray(object);\n\n      iteratee = getIteratee(iteratee, 4);\n      if (accumulator == null) {\n        var Ctor = object && object.constructor;\n        if (isArrLike) {\n          accumulator = isArr ? new Ctor : [];\n        }\n        else if (isObject(object)) {\n          accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};\n        }\n        else {\n          accumulator = {};\n        }\n      }\n      (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {\n        return iteratee(accumulator, value, index, object);\n      });\n      return accumulator;\n    }\n\n    /**\n     * Removes the property at `path` of `object`.\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Object\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The path of the property to unset.\n     * @returns {boolean} Returns `true` if the property is deleted, else `false`.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c': 7 } }] };\n     * _.unset(object, 'a[0].b.c');\n     * // => true\n     *\n     * console.log(object);\n     * // => { 'a': [{ 'b': {} }] };\n     *\n     * _.unset(object, ['a', '0', 'b', 'c']);\n     * // => true\n     *\n     * console.log(object);\n     * // => { 'a': [{ 'b': {} }] };\n     */\n    function unset(object, path) {\n      return object == null ? true : baseUnset(object, path);\n    }\n\n    /**\n     * This method is like `_.set` except that accepts `updater` to produce the\n     * value to set. Use `_.updateWith` to customize `path` creation. The `updater`\n     * is invoked with one argument: (value).\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.6.0\n     * @category Object\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The path of the property to set.\n     * @param {Function} updater The function to produce the updated value.\n     * @returns {Object} Returns `object`.\n     * @example\n     *\n     * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n     *\n     * _.update(object, 'a[0].b.c', function(n) { return n * n; });\n     * console.log(object.a[0].b.c);\n     * // => 9\n     *\n     * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });\n     * console.log(object.x[0].y.z);\n     * // => 0\n     */\n    function update(object, path, updater) {\n      return object == null ? object : baseUpdate(object, path, castFunction(updater));\n    }\n\n    /**\n     * This method is like `_.update` except that it accepts `customizer` which is\n     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`\n     * path creation is handled by the method instead. The `customizer` is invoked\n     * with three arguments: (nsValue, key, nsObject).\n     *\n     * **Note:** This method mutates `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.6.0\n     * @category Object\n     * @param {Object} object The object to modify.\n     * @param {Array|string} path The path of the property to set.\n     * @param {Function} updater The function to produce the updated value.\n     * @param {Function} [customizer] The function to customize assigned values.\n     * @returns {Object} Returns `object`.\n     * @example\n     *\n     * var object = {};\n     *\n     * _.updateWith(object, '[0][1]', _.constant('a'), Object);\n     * // => { '0': { '1': 'a' } }\n     */\n    function updateWith(object, path, updater, customizer) {\n      customizer = typeof customizer == 'function' ? customizer : undefined;\n      return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);\n    }\n\n    /**\n     * Creates an array of the own enumerable string keyed property values of `object`.\n     *\n     * **Note:** Non-object values are coerced to objects.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Object\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property values.\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.values(new Foo);\n     * // => [1, 2] (iteration order is not guaranteed)\n     *\n     * _.values('hi');\n     * // => ['h', 'i']\n     */\n    function values(object) {\n      return object == null ? [] : baseValues(object, keys(object));\n    }\n\n    /**\n     * Creates an array of the own and inherited enumerable string keyed property\n     * values of `object`.\n     *\n     * **Note:** Non-object values are coerced to objects.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Object\n     * @param {Object} object The object to query.\n     * @returns {Array} Returns the array of property values.\n     * @example\n     *\n     * function Foo() {\n     *   this.a = 1;\n     *   this.b = 2;\n     * }\n     *\n     * Foo.prototype.c = 3;\n     *\n     * _.valuesIn(new Foo);\n     * // => [1, 2, 3] (iteration order is not guaranteed)\n     */\n    function valuesIn(object) {\n      return object == null ? [] : baseValues(object, keysIn(object));\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Clamps `number` within the inclusive `lower` and `upper` bounds.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Number\n     * @param {number} number The number to clamp.\n     * @param {number} [lower] The lower bound.\n     * @param {number} upper The upper bound.\n     * @returns {number} Returns the clamped number.\n     * @example\n     *\n     * _.clamp(-10, -5, 5);\n     * // => -5\n     *\n     * _.clamp(10, -5, 5);\n     * // => 5\n     */\n    function clamp(number, lower, upper) {\n      if (upper === undefined) {\n        upper = lower;\n        lower = undefined;\n      }\n      if (upper !== undefined) {\n        upper = toNumber(upper);\n        upper = upper === upper ? upper : 0;\n      }\n      if (lower !== undefined) {\n        lower = toNumber(lower);\n        lower = lower === lower ? lower : 0;\n      }\n      return baseClamp(toNumber(number), lower, upper);\n    }\n\n    /**\n     * Checks if `n` is between `start` and up to, but not including, `end`. If\n     * `end` is not specified, it's set to `start` with `start` then set to `0`.\n     * If `start` is greater than `end` the params are swapped to support\n     * negative ranges.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.3.0\n     * @category Number\n     * @param {number} number The number to check.\n     * @param {number} [start=0] The start of the range.\n     * @param {number} end The end of the range.\n     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.\n     * @see _.range, _.rangeRight\n     * @example\n     *\n     * _.inRange(3, 2, 4);\n     * // => true\n     *\n     * _.inRange(4, 8);\n     * // => true\n     *\n     * _.inRange(4, 2);\n     * // => false\n     *\n     * _.inRange(2, 2);\n     * // => false\n     *\n     * _.inRange(1.2, 2);\n     * // => true\n     *\n     * _.inRange(5.2, 4);\n     * // => false\n     *\n     * _.inRange(-3, -2, -6);\n     * // => true\n     */\n    function inRange(number, start, end) {\n      start = toFinite(start);\n      if (end === undefined) {\n        end = start;\n        start = 0;\n      } else {\n        end = toFinite(end);\n      }\n      number = toNumber(number);\n      return baseInRange(number, start, end);\n    }\n\n    /**\n     * Produces a random number between the inclusive `lower` and `upper` bounds.\n     * If only one argument is provided a number between `0` and the given number\n     * is returned. If `floating` is `true`, or either `lower` or `upper` are\n     * floats, a floating-point number is returned instead of an integer.\n     *\n     * **Note:** JavaScript follows the IEEE-754 standard for resolving\n     * floating-point values which can produce unexpected results.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.7.0\n     * @category Number\n     * @param {number} [lower=0] The lower bound.\n     * @param {number} [upper=1] The upper bound.\n     * @param {boolean} [floating] Specify returning a floating-point number.\n     * @returns {number} Returns the random number.\n     * @example\n     *\n     * _.random(0, 5);\n     * // => an integer between 0 and 5\n     *\n     * _.random(5);\n     * // => also an integer between 0 and 5\n     *\n     * _.random(5, true);\n     * // => a floating-point number between 0 and 5\n     *\n     * _.random(1.2, 5.2);\n     * // => a floating-point number between 1.2 and 5.2\n     */\n    function random(lower, upper, floating) {\n      if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {\n        upper = floating = undefined;\n      }\n      if (floating === undefined) {\n        if (typeof upper == 'boolean') {\n          floating = upper;\n          upper = undefined;\n        }\n        else if (typeof lower == 'boolean') {\n          floating = lower;\n          lower = undefined;\n        }\n      }\n      if (lower === undefined && upper === undefined) {\n        lower = 0;\n        upper = 1;\n      }\n      else {\n        lower = toFinite(lower);\n        if (upper === undefined) {\n          upper = lower;\n          lower = 0;\n        } else {\n          upper = toFinite(upper);\n        }\n      }\n      if (lower > upper) {\n        var temp = lower;\n        lower = upper;\n        upper = temp;\n      }\n      if (floating || lower % 1 || upper % 1) {\n        var rand = nativeRandom();\n        return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);\n      }\n      return baseRandom(lower, upper);\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the camel cased string.\n     * @example\n     *\n     * _.camelCase('Foo Bar');\n     * // => 'fooBar'\n     *\n     * _.camelCase('--foo-bar--');\n     * // => 'fooBar'\n     *\n     * _.camelCase('__FOO_BAR__');\n     * // => 'fooBar'\n     */\n    var camelCase = createCompounder(function(result, word, index) {\n      word = word.toLowerCase();\n      return result + (index ? capitalize(word) : word);\n    });\n\n    /**\n     * Converts the first character of `string` to upper case and the remaining\n     * to lower case.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to capitalize.\n     * @returns {string} Returns the capitalized string.\n     * @example\n     *\n     * _.capitalize('FRED');\n     * // => 'Fred'\n     */\n    function capitalize(string) {\n      return upperFirst(toString(string).toLowerCase());\n    }\n\n    /**\n     * Deburrs `string` by converting\n     * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)\n     * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)\n     * letters to basic Latin letters and removing\n     * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to deburr.\n     * @returns {string} Returns the deburred string.\n     * @example\n     *\n     * _.deburr('déjà vu');\n     * // => 'deja vu'\n     */\n    function deburr(string) {\n      string = toString(string);\n      return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');\n    }\n\n    /**\n     * Checks if `string` ends with the given target string.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to inspect.\n     * @param {string} [target] The string to search for.\n     * @param {number} [position=string.length] The position to search up to.\n     * @returns {boolean} Returns `true` if `string` ends with `target`,\n     *  else `false`.\n     * @example\n     *\n     * _.endsWith('abc', 'c');\n     * // => true\n     *\n     * _.endsWith('abc', 'b');\n     * // => false\n     *\n     * _.endsWith('abc', 'b', 2);\n     * // => true\n     */\n    function endsWith(string, target, position) {\n      string = toString(string);\n      target = baseToString(target);\n\n      var length = string.length;\n      position = position === undefined\n        ? length\n        : baseClamp(toInteger(position), 0, length);\n\n      var end = position;\n      position -= target.length;\n      return position >= 0 && string.slice(position, end) == target;\n    }\n\n    /**\n     * Converts the characters \"&\", \"<\", \">\", '\"', and \"'\" in `string` to their\n     * corresponding HTML entities.\n     *\n     * **Note:** No other characters are escaped. To escape additional\n     * characters use a third-party library like [_he_](https://mths.be/he).\n     *\n     * Though the \">\" character is escaped for symmetry, characters like\n     * \">\" and \"/\" don't need escaping in HTML and have no special meaning\n     * unless they're part of a tag or unquoted attribute value. See\n     * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)\n     * (under \"semi-related fun fact\") for more details.\n     *\n     * When working with HTML you should always\n     * [quote attribute values](http://wonko.com/post/html-escaping) to reduce\n     * XSS vectors.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category String\n     * @param {string} [string=''] The string to escape.\n     * @returns {string} Returns the escaped string.\n     * @example\n     *\n     * _.escape('fred, barney, & pebbles');\n     * // => 'fred, barney, &amp; pebbles'\n     */\n    function escape(string) {\n      string = toString(string);\n      return (string && reHasUnescapedHtml.test(string))\n        ? string.replace(reUnescapedHtml, escapeHtmlChar)\n        : string;\n    }\n\n    /**\n     * Escapes the `RegExp` special characters \"^\", \"$\", \"\\\", \".\", \"*\", \"+\",\n     * \"?\", \"(\", \")\", \"[\", \"]\", \"{\", \"}\", and \"|\" in `string`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to escape.\n     * @returns {string} Returns the escaped string.\n     * @example\n     *\n     * _.escapeRegExp('[lodash](https://lodash.com/)');\n     * // => '\\[lodash\\]\\(https://lodash\\.com/\\)'\n     */\n    function escapeRegExp(string) {\n      string = toString(string);\n      return (string && reHasRegExpChar.test(string))\n        ? string.replace(reRegExpChar, '\\\\$&')\n        : string;\n    }\n\n    /**\n     * Converts `string` to\n     * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the kebab cased string.\n     * @example\n     *\n     * _.kebabCase('Foo Bar');\n     * // => 'foo-bar'\n     *\n     * _.kebabCase('fooBar');\n     * // => 'foo-bar'\n     *\n     * _.kebabCase('__FOO_BAR__');\n     * // => 'foo-bar'\n     */\n    var kebabCase = createCompounder(function(result, word, index) {\n      return result + (index ? '-' : '') + word.toLowerCase();\n    });\n\n    /**\n     * Converts `string`, as space separated words, to lower case.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the lower cased string.\n     * @example\n     *\n     * _.lowerCase('--Foo-Bar--');\n     * // => 'foo bar'\n     *\n     * _.lowerCase('fooBar');\n     * // => 'foo bar'\n     *\n     * _.lowerCase('__FOO_BAR__');\n     * // => 'foo bar'\n     */\n    var lowerCase = createCompounder(function(result, word, index) {\n      return result + (index ? ' ' : '') + word.toLowerCase();\n    });\n\n    /**\n     * Converts the first character of `string` to lower case.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the converted string.\n     * @example\n     *\n     * _.lowerFirst('Fred');\n     * // => 'fred'\n     *\n     * _.lowerFirst('FRED');\n     * // => 'fRED'\n     */\n    var lowerFirst = createCaseFirst('toLowerCase');\n\n    /**\n     * Pads `string` on the left and right sides if it's shorter than `length`.\n     * Padding characters are truncated if they can't be evenly divided by `length`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to pad.\n     * @param {number} [length=0] The padding length.\n     * @param {string} [chars=' '] The string used as padding.\n     * @returns {string} Returns the padded string.\n     * @example\n     *\n     * _.pad('abc', 8);\n     * // => '  abc   '\n     *\n     * _.pad('abc', 8, '_-');\n     * // => '_-abc_-_'\n     *\n     * _.pad('abc', 3);\n     * // => 'abc'\n     */\n    function pad(string, length, chars) {\n      string = toString(string);\n      length = toInteger(length);\n\n      var strLength = length ? stringSize(string) : 0;\n      if (!length || strLength >= length) {\n        return string;\n      }\n      var mid = (length - strLength) / 2;\n      return (\n        createPadding(nativeFloor(mid), chars) +\n        string +\n        createPadding(nativeCeil(mid), chars)\n      );\n    }\n\n    /**\n     * Pads `string` on the right side if it's shorter than `length`. Padding\n     * characters are truncated if they exceed `length`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to pad.\n     * @param {number} [length=0] The padding length.\n     * @param {string} [chars=' '] The string used as padding.\n     * @returns {string} Returns the padded string.\n     * @example\n     *\n     * _.padEnd('abc', 6);\n     * // => 'abc   '\n     *\n     * _.padEnd('abc', 6, '_-');\n     * // => 'abc_-_'\n     *\n     * _.padEnd('abc', 3);\n     * // => 'abc'\n     */\n    function padEnd(string, length, chars) {\n      string = toString(string);\n      length = toInteger(length);\n\n      var strLength = length ? stringSize(string) : 0;\n      return (length && strLength < length)\n        ? (string + createPadding(length - strLength, chars))\n        : string;\n    }\n\n    /**\n     * Pads `string` on the left side if it's shorter than `length`. Padding\n     * characters are truncated if they exceed `length`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to pad.\n     * @param {number} [length=0] The padding length.\n     * @param {string} [chars=' '] The string used as padding.\n     * @returns {string} Returns the padded string.\n     * @example\n     *\n     * _.padStart('abc', 6);\n     * // => '   abc'\n     *\n     * _.padStart('abc', 6, '_-');\n     * // => '_-_abc'\n     *\n     * _.padStart('abc', 3);\n     * // => 'abc'\n     */\n    function padStart(string, length, chars) {\n      string = toString(string);\n      length = toInteger(length);\n\n      var strLength = length ? stringSize(string) : 0;\n      return (length && strLength < length)\n        ? (createPadding(length - strLength, chars) + string)\n        : string;\n    }\n\n    /**\n     * Converts `string` to an integer of the specified radix. If `radix` is\n     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a\n     * hexadecimal, in which case a `radix` of `16` is used.\n     *\n     * **Note:** This method aligns with the\n     * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.\n     *\n     * @static\n     * @memberOf _\n     * @since 1.1.0\n     * @category String\n     * @param {string} string The string to convert.\n     * @param {number} [radix=10] The radix to interpret `value` by.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {number} Returns the converted integer.\n     * @example\n     *\n     * _.parseInt('08');\n     * // => 8\n     *\n     * _.map(['6', '08', '10'], _.parseInt);\n     * // => [6, 8, 10]\n     */\n    function parseInt(string, radix, guard) {\n      if (guard || radix == null) {\n        radix = 0;\n      } else if (radix) {\n        radix = +radix;\n      }\n      return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);\n    }\n\n    /**\n     * Repeats the given string `n` times.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to repeat.\n     * @param {number} [n=1] The number of times to repeat the string.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {string} Returns the repeated string.\n     * @example\n     *\n     * _.repeat('*', 3);\n     * // => '***'\n     *\n     * _.repeat('abc', 2);\n     * // => 'abcabc'\n     *\n     * _.repeat('abc', 0);\n     * // => ''\n     */\n    function repeat(string, n, guard) {\n      if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {\n        n = 1;\n      } else {\n        n = toInteger(n);\n      }\n      return baseRepeat(toString(string), n);\n    }\n\n    /**\n     * Replaces matches for `pattern` in `string` with `replacement`.\n     *\n     * **Note:** This method is based on\n     * [`String#replace`](https://mdn.io/String/replace).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to modify.\n     * @param {RegExp|string} pattern The pattern to replace.\n     * @param {Function|string} replacement The match replacement.\n     * @returns {string} Returns the modified string.\n     * @example\n     *\n     * _.replace('Hi Fred', 'Fred', 'Barney');\n     * // => 'Hi Barney'\n     */\n    function replace() {\n      var args = arguments,\n          string = toString(args[0]);\n\n      return args.length < 3 ? string : string.replace(args[1], args[2]);\n    }\n\n    /**\n     * Converts `string` to\n     * [snake case](https://en.wikipedia.org/wiki/Snake_case).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the snake cased string.\n     * @example\n     *\n     * _.snakeCase('Foo Bar');\n     * // => 'foo_bar'\n     *\n     * _.snakeCase('fooBar');\n     * // => 'foo_bar'\n     *\n     * _.snakeCase('--FOO-BAR--');\n     * // => 'foo_bar'\n     */\n    var snakeCase = createCompounder(function(result, word, index) {\n      return result + (index ? '_' : '') + word.toLowerCase();\n    });\n\n    /**\n     * Splits `string` by `separator`.\n     *\n     * **Note:** This method is based on\n     * [`String#split`](https://mdn.io/String/split).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to split.\n     * @param {RegExp|string} separator The separator pattern to split by.\n     * @param {number} [limit] The length to truncate results to.\n     * @returns {Array} Returns the string segments.\n     * @example\n     *\n     * _.split('a-b-c', '-', 2);\n     * // => ['a', 'b']\n     */\n    function split(string, separator, limit) {\n      if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {\n        separator = limit = undefined;\n      }\n      limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;\n      if (!limit) {\n        return [];\n      }\n      string = toString(string);\n      if (string && (\n            typeof separator == 'string' ||\n            (separator != null && !isRegExp(separator))\n          )) {\n        separator = baseToString(separator);\n        if (!separator && hasUnicode(string)) {\n          return castSlice(stringToArray(string), 0, limit);\n        }\n      }\n      return string.split(separator, limit);\n    }\n\n    /**\n     * Converts `string` to\n     * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).\n     *\n     * @static\n     * @memberOf _\n     * @since 3.1.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the start cased string.\n     * @example\n     *\n     * _.startCase('--foo-bar--');\n     * // => 'Foo Bar'\n     *\n     * _.startCase('fooBar');\n     * // => 'Foo Bar'\n     *\n     * _.startCase('__FOO_BAR__');\n     * // => 'FOO BAR'\n     */\n    var startCase = createCompounder(function(result, word, index) {\n      return result + (index ? ' ' : '') + upperFirst(word);\n    });\n\n    /**\n     * Checks if `string` starts with the given target string.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to inspect.\n     * @param {string} [target] The string to search for.\n     * @param {number} [position=0] The position to search from.\n     * @returns {boolean} Returns `true` if `string` starts with `target`,\n     *  else `false`.\n     * @example\n     *\n     * _.startsWith('abc', 'a');\n     * // => true\n     *\n     * _.startsWith('abc', 'b');\n     * // => false\n     *\n     * _.startsWith('abc', 'b', 1);\n     * // => true\n     */\n    function startsWith(string, target, position) {\n      string = toString(string);\n      position = position == null\n        ? 0\n        : baseClamp(toInteger(position), 0, string.length);\n\n      target = baseToString(target);\n      return string.slice(position, position + target.length) == target;\n    }\n\n    /**\n     * Creates a compiled template function that can interpolate data properties\n     * in \"interpolate\" delimiters, HTML-escape interpolated data properties in\n     * \"escape\" delimiters, and execute JavaScript in \"evaluate\" delimiters. Data\n     * properties may be accessed as free variables in the template. If a setting\n     * object is given, it takes precedence over `_.templateSettings` values.\n     *\n     * **Note:** In the development build `_.template` utilizes\n     * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)\n     * for easier debugging.\n     *\n     * For more information on precompiling templates see\n     * [lodash's custom builds documentation](https://lodash.com/custom-builds).\n     *\n     * For more information on Chrome extension sandboxes see\n     * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category String\n     * @param {string} [string=''] The template string.\n     * @param {Object} [options={}] The options object.\n     * @param {RegExp} [options.escape=_.templateSettings.escape]\n     *  The HTML \"escape\" delimiter.\n     * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]\n     *  The \"evaluate\" delimiter.\n     * @param {Object} [options.imports=_.templateSettings.imports]\n     *  An object to import into the template as free variables.\n     * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]\n     *  The \"interpolate\" delimiter.\n     * @param {string} [options.sourceURL='lodash.templateSources[n]']\n     *  The sourceURL of the compiled template.\n     * @param {string} [options.variable='obj']\n     *  The data object variable name.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Function} Returns the compiled template function.\n     * @example\n     *\n     * // Use the \"interpolate\" delimiter to create a compiled template.\n     * var compiled = _.template('hello <%= user %>!');\n     * compiled({ 'user': 'fred' });\n     * // => 'hello fred!'\n     *\n     * // Use the HTML \"escape\" delimiter to escape data property values.\n     * var compiled = _.template('<b><%- value %></b>');\n     * compiled({ 'value': '<script>' });\n     * // => '<b>&lt;script&gt;</b>'\n     *\n     * // Use the \"evaluate\" delimiter to execute JavaScript and generate HTML.\n     * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');\n     * compiled({ 'users': ['fred', 'barney'] });\n     * // => '<li>fred</li><li>barney</li>'\n     *\n     * // Use the internal `print` function in \"evaluate\" delimiters.\n     * var compiled = _.template('<% print(\"hello \" + user); %>!');\n     * compiled({ 'user': 'barney' });\n     * // => 'hello barney!'\n     *\n     * // Use the ES template literal delimiter as an \"interpolate\" delimiter.\n     * // Disable support by replacing the \"interpolate\" delimiter.\n     * var compiled = _.template('hello ${ user }!');\n     * compiled({ 'user': 'pebbles' });\n     * // => 'hello pebbles!'\n     *\n     * // Use backslashes to treat delimiters as plain text.\n     * var compiled = _.template('<%= \"\\\\<%- value %\\\\>\" %>');\n     * compiled({ 'value': 'ignored' });\n     * // => '<%- value %>'\n     *\n     * // Use the `imports` option to import `jQuery` as `jq`.\n     * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';\n     * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });\n     * compiled({ 'users': ['fred', 'barney'] });\n     * // => '<li>fred</li><li>barney</li>'\n     *\n     * // Use the `sourceURL` option to specify a custom sourceURL for the template.\n     * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });\n     * compiled(data);\n     * // => Find the source of \"greeting.jst\" under the Sources tab or Resources panel of the web inspector.\n     *\n     * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.\n     * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });\n     * compiled.source;\n     * // => function(data) {\n     * //   var __t, __p = '';\n     * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';\n     * //   return __p;\n     * // }\n     *\n     * // Use custom template delimiters.\n     * _.templateSettings.interpolate = /{{([\\s\\S]+?)}}/g;\n     * var compiled = _.template('hello {{ user }}!');\n     * compiled({ 'user': 'mustache' });\n     * // => 'hello mustache!'\n     *\n     * // Use the `source` property to inline compiled templates for meaningful\n     * // line numbers in error messages and stack traces.\n     * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\\\n     *   var JST = {\\\n     *     \"main\": ' + _.template(mainText).source + '\\\n     *   };\\\n     * ');\n     */\n    function template(string, options, guard) {\n      // Based on John Resig's `tmpl` implementation\n      // (http://ejohn.org/blog/javascript-micro-templating/)\n      // and Laura Doktorova's doT.js (https://github.com/olado/doT).\n      var settings = lodash.templateSettings;\n\n      if (guard && isIterateeCall(string, options, guard)) {\n        options = undefined;\n      }\n      string = toString(string);\n      options = assignInWith({}, options, settings, customDefaultsAssignIn);\n\n      var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),\n          importsKeys = keys(imports),\n          importsValues = baseValues(imports, importsKeys);\n\n      var isEscaping,\n          isEvaluating,\n          index = 0,\n          interpolate = options.interpolate || reNoMatch,\n          source = \"__p += '\";\n\n      // Compile the regexp to match each delimiter.\n      var reDelimiters = RegExp(\n        (options.escape || reNoMatch).source + '|' +\n        interpolate.source + '|' +\n        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +\n        (options.evaluate || reNoMatch).source + '|$'\n      , 'g');\n\n      // Use a sourceURL for easier debugging.\n      var sourceURL = '//# sourceURL=' +\n        ('sourceURL' in options\n          ? options.sourceURL\n          : ('lodash.templateSources[' + (++templateCounter) + ']')\n        ) + '\\n';\n\n      string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {\n        interpolateValue || (interpolateValue = esTemplateValue);\n\n        // Escape characters that can't be included in string literals.\n        source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);\n\n        // Replace delimiters with snippets.\n        if (escapeValue) {\n          isEscaping = true;\n          source += \"' +\\n__e(\" + escapeValue + \") +\\n'\";\n        }\n        if (evaluateValue) {\n          isEvaluating = true;\n          source += \"';\\n\" + evaluateValue + \";\\n__p += '\";\n        }\n        if (interpolateValue) {\n          source += \"' +\\n((__t = (\" + interpolateValue + \")) == null ? '' : __t) +\\n'\";\n        }\n        index = offset + match.length;\n\n        // The JS engine embedded in Adobe products needs `match` returned in\n        // order to produce the correct `offset` value.\n        return match;\n      });\n\n      source += \"';\\n\";\n\n      // If `variable` is not specified wrap a with-statement around the generated\n      // code to add the data object to the top of the scope chain.\n      var variable = options.variable;\n      if (!variable) {\n        source = 'with (obj) {\\n' + source + '\\n}\\n';\n      }\n      // Cleanup code by stripping empty strings.\n      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)\n        .replace(reEmptyStringMiddle, '$1')\n        .replace(reEmptyStringTrailing, '$1;');\n\n      // Frame code as the function body.\n      source = 'function(' + (variable || 'obj') + ') {\\n' +\n        (variable\n          ? ''\n          : 'obj || (obj = {});\\n'\n        ) +\n        \"var __t, __p = ''\" +\n        (isEscaping\n           ? ', __e = _.escape'\n           : ''\n        ) +\n        (isEvaluating\n          ? ', __j = Array.prototype.join;\\n' +\n            \"function print() { __p += __j.call(arguments, '') }\\n\"\n          : ';\\n'\n        ) +\n        source +\n        'return __p\\n}';\n\n      var result = attempt(function() {\n        return Function(importsKeys, sourceURL + 'return ' + source)\n          .apply(undefined, importsValues);\n      });\n\n      // Provide the compiled function's source by its `toString` method or\n      // the `source` property as a convenience for inlining compiled templates.\n      result.source = source;\n      if (isError(result)) {\n        throw result;\n      }\n      return result;\n    }\n\n    /**\n     * Converts `string`, as a whole, to lower case just like\n     * [String#toLowerCase](https://mdn.io/toLowerCase).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the lower cased string.\n     * @example\n     *\n     * _.toLower('--Foo-Bar--');\n     * // => '--foo-bar--'\n     *\n     * _.toLower('fooBar');\n     * // => 'foobar'\n     *\n     * _.toLower('__FOO_BAR__');\n     * // => '__foo_bar__'\n     */\n    function toLower(value) {\n      return toString(value).toLowerCase();\n    }\n\n    /**\n     * Converts `string`, as a whole, to upper case just like\n     * [String#toUpperCase](https://mdn.io/toUpperCase).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the upper cased string.\n     * @example\n     *\n     * _.toUpper('--foo-bar--');\n     * // => '--FOO-BAR--'\n     *\n     * _.toUpper('fooBar');\n     * // => 'FOOBAR'\n     *\n     * _.toUpper('__foo_bar__');\n     * // => '__FOO_BAR__'\n     */\n    function toUpper(value) {\n      return toString(value).toUpperCase();\n    }\n\n    /**\n     * Removes leading and trailing whitespace or specified characters from `string`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to trim.\n     * @param {string} [chars=whitespace] The characters to trim.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {string} Returns the trimmed string.\n     * @example\n     *\n     * _.trim('  abc  ');\n     * // => 'abc'\n     *\n     * _.trim('-_-abc-_-', '_-');\n     * // => 'abc'\n     *\n     * _.map(['  foo  ', '  bar  '], _.trim);\n     * // => ['foo', 'bar']\n     */\n    function trim(string, chars, guard) {\n      string = toString(string);\n      if (string && (guard || chars === undefined)) {\n        return string.replace(reTrim, '');\n      }\n      if (!string || !(chars = baseToString(chars))) {\n        return string;\n      }\n      var strSymbols = stringToArray(string),\n          chrSymbols = stringToArray(chars),\n          start = charsStartIndex(strSymbols, chrSymbols),\n          end = charsEndIndex(strSymbols, chrSymbols) + 1;\n\n      return castSlice(strSymbols, start, end).join('');\n    }\n\n    /**\n     * Removes trailing whitespace or specified characters from `string`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to trim.\n     * @param {string} [chars=whitespace] The characters to trim.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {string} Returns the trimmed string.\n     * @example\n     *\n     * _.trimEnd('  abc  ');\n     * // => '  abc'\n     *\n     * _.trimEnd('-_-abc-_-', '_-');\n     * // => '-_-abc'\n     */\n    function trimEnd(string, chars, guard) {\n      string = toString(string);\n      if (string && (guard || chars === undefined)) {\n        return string.replace(reTrimEnd, '');\n      }\n      if (!string || !(chars = baseToString(chars))) {\n        return string;\n      }\n      var strSymbols = stringToArray(string),\n          end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;\n\n      return castSlice(strSymbols, 0, end).join('');\n    }\n\n    /**\n     * Removes leading whitespace or specified characters from `string`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to trim.\n     * @param {string} [chars=whitespace] The characters to trim.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {string} Returns the trimmed string.\n     * @example\n     *\n     * _.trimStart('  abc  ');\n     * // => 'abc  '\n     *\n     * _.trimStart('-_-abc-_-', '_-');\n     * // => 'abc-_-'\n     */\n    function trimStart(string, chars, guard) {\n      string = toString(string);\n      if (string && (guard || chars === undefined)) {\n        return string.replace(reTrimStart, '');\n      }\n      if (!string || !(chars = baseToString(chars))) {\n        return string;\n      }\n      var strSymbols = stringToArray(string),\n          start = charsStartIndex(strSymbols, stringToArray(chars));\n\n      return castSlice(strSymbols, start).join('');\n    }\n\n    /**\n     * Truncates `string` if it's longer than the given maximum string length.\n     * The last characters of the truncated string are replaced with the omission\n     * string which defaults to \"...\".\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to truncate.\n     * @param {Object} [options={}] The options object.\n     * @param {number} [options.length=30] The maximum string length.\n     * @param {string} [options.omission='...'] The string to indicate text is omitted.\n     * @param {RegExp|string} [options.separator] The separator pattern to truncate to.\n     * @returns {string} Returns the truncated string.\n     * @example\n     *\n     * _.truncate('hi-diddly-ho there, neighborino');\n     * // => 'hi-diddly-ho there, neighbo...'\n     *\n     * _.truncate('hi-diddly-ho there, neighborino', {\n     *   'length': 24,\n     *   'separator': ' '\n     * });\n     * // => 'hi-diddly-ho there,...'\n     *\n     * _.truncate('hi-diddly-ho there, neighborino', {\n     *   'length': 24,\n     *   'separator': /,? +/\n     * });\n     * // => 'hi-diddly-ho there...'\n     *\n     * _.truncate('hi-diddly-ho there, neighborino', {\n     *   'omission': ' [...]'\n     * });\n     * // => 'hi-diddly-ho there, neig [...]'\n     */\n    function truncate(string, options) {\n      var length = DEFAULT_TRUNC_LENGTH,\n          omission = DEFAULT_TRUNC_OMISSION;\n\n      if (isObject(options)) {\n        var separator = 'separator' in options ? options.separator : separator;\n        length = 'length' in options ? toInteger(options.length) : length;\n        omission = 'omission' in options ? baseToString(options.omission) : omission;\n      }\n      string = toString(string);\n\n      var strLength = string.length;\n      if (hasUnicode(string)) {\n        var strSymbols = stringToArray(string);\n        strLength = strSymbols.length;\n      }\n      if (length >= strLength) {\n        return string;\n      }\n      var end = length - stringSize(omission);\n      if (end < 1) {\n        return omission;\n      }\n      var result = strSymbols\n        ? castSlice(strSymbols, 0, end).join('')\n        : string.slice(0, end);\n\n      if (separator === undefined) {\n        return result + omission;\n      }\n      if (strSymbols) {\n        end += (result.length - end);\n      }\n      if (isRegExp(separator)) {\n        if (string.slice(end).search(separator)) {\n          var match,\n              substring = result;\n\n          if (!separator.global) {\n            separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');\n          }\n          separator.lastIndex = 0;\n          while ((match = separator.exec(substring))) {\n            var newEnd = match.index;\n          }\n          result = result.slice(0, newEnd === undefined ? end : newEnd);\n        }\n      } else if (string.indexOf(baseToString(separator), end) != end) {\n        var index = result.lastIndexOf(separator);\n        if (index > -1) {\n          result = result.slice(0, index);\n        }\n      }\n      return result + omission;\n    }\n\n    /**\n     * The inverse of `_.escape`; this method converts the HTML entities\n     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to\n     * their corresponding characters.\n     *\n     * **Note:** No other HTML entities are unescaped. To unescape additional\n     * HTML entities use a third-party library like [_he_](https://mths.be/he).\n     *\n     * @static\n     * @memberOf _\n     * @since 0.6.0\n     * @category String\n     * @param {string} [string=''] The string to unescape.\n     * @returns {string} Returns the unescaped string.\n     * @example\n     *\n     * _.unescape('fred, barney, &amp; pebbles');\n     * // => 'fred, barney, & pebbles'\n     */\n    function unescape(string) {\n      string = toString(string);\n      return (string && reHasEscapedHtml.test(string))\n        ? string.replace(reEscapedHtml, unescapeHtmlChar)\n        : string;\n    }\n\n    /**\n     * Converts `string`, as space separated words, to upper case.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the upper cased string.\n     * @example\n     *\n     * _.upperCase('--foo-bar');\n     * // => 'FOO BAR'\n     *\n     * _.upperCase('fooBar');\n     * // => 'FOO BAR'\n     *\n     * _.upperCase('__foo_bar__');\n     * // => 'FOO BAR'\n     */\n    var upperCase = createCompounder(function(result, word, index) {\n      return result + (index ? ' ' : '') + word.toUpperCase();\n    });\n\n    /**\n     * Converts the first character of `string` to upper case.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category String\n     * @param {string} [string=''] The string to convert.\n     * @returns {string} Returns the converted string.\n     * @example\n     *\n     * _.upperFirst('fred');\n     * // => 'Fred'\n     *\n     * _.upperFirst('FRED');\n     * // => 'FRED'\n     */\n    var upperFirst = createCaseFirst('toUpperCase');\n\n    /**\n     * Splits `string` into an array of its words.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category String\n     * @param {string} [string=''] The string to inspect.\n     * @param {RegExp|string} [pattern] The pattern to match words.\n     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n     * @returns {Array} Returns the words of `string`.\n     * @example\n     *\n     * _.words('fred, barney, & pebbles');\n     * // => ['fred', 'barney', 'pebbles']\n     *\n     * _.words('fred, barney, & pebbles', /[^, ]+/g);\n     * // => ['fred', 'barney', '&', 'pebbles']\n     */\n    function words(string, pattern, guard) {\n      string = toString(string);\n      pattern = guard ? undefined : pattern;\n\n      if (pattern === undefined) {\n        return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);\n      }\n      return string.match(pattern) || [];\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Attempts to invoke `func`, returning either the result or the caught error\n     * object. Any additional arguments are provided to `func` when it's invoked.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Util\n     * @param {Function} func The function to attempt.\n     * @param {...*} [args] The arguments to invoke `func` with.\n     * @returns {*} Returns the `func` result or error object.\n     * @example\n     *\n     * // Avoid throwing errors for invalid selectors.\n     * var elements = _.attempt(function(selector) {\n     *   return document.querySelectorAll(selector);\n     * }, '>_>');\n     *\n     * if (_.isError(elements)) {\n     *   elements = [];\n     * }\n     */\n    var attempt = baseRest(function(func, args) {\n      try {\n        return apply(func, undefined, args);\n      } catch (e) {\n        return isError(e) ? e : new Error(e);\n      }\n    });\n\n    /**\n     * Binds methods of an object to the object itself, overwriting the existing\n     * method.\n     *\n     * **Note:** This method doesn't set the \"length\" property of bound functions.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Util\n     * @param {Object} object The object to bind and assign the bound methods to.\n     * @param {...(string|string[])} methodNames The object method names to bind.\n     * @returns {Object} Returns `object`.\n     * @example\n     *\n     * var view = {\n     *   'label': 'docs',\n     *   'click': function() {\n     *     console.log('clicked ' + this.label);\n     *   }\n     * };\n     *\n     * _.bindAll(view, ['click']);\n     * jQuery(element).on('click', view.click);\n     * // => Logs 'clicked docs' when clicked.\n     */\n    var bindAll = flatRest(function(object, methodNames) {\n      arrayEach(methodNames, function(key) {\n        key = toKey(key);\n        baseAssignValue(object, key, bind(object[key], object));\n      });\n      return object;\n    });\n\n    /**\n     * Creates a function that iterates over `pairs` and invokes the corresponding\n     * function of the first predicate to return truthy. The predicate-function\n     * pairs are invoked with the `this` binding and arguments of the created\n     * function.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {Array} pairs The predicate-function pairs.\n     * @returns {Function} Returns the new composite function.\n     * @example\n     *\n     * var func = _.cond([\n     *   [_.matches({ 'a': 1 }),           _.constant('matches A')],\n     *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],\n     *   [_.stubTrue,                      _.constant('no match')]\n     * ]);\n     *\n     * func({ 'a': 1, 'b': 2 });\n     * // => 'matches A'\n     *\n     * func({ 'a': 0, 'b': 1 });\n     * // => 'matches B'\n     *\n     * func({ 'a': '1', 'b': '2' });\n     * // => 'no match'\n     */\n    function cond(pairs) {\n      var length = pairs == null ? 0 : pairs.length,\n          toIteratee = getIteratee();\n\n      pairs = !length ? [] : arrayMap(pairs, function(pair) {\n        if (typeof pair[1] != 'function') {\n          throw new TypeError(FUNC_ERROR_TEXT);\n        }\n        return [toIteratee(pair[0]), pair[1]];\n      });\n\n      return baseRest(function(args) {\n        var index = -1;\n        while (++index < length) {\n          var pair = pairs[index];\n          if (apply(pair[0], this, args)) {\n            return apply(pair[1], this, args);\n          }\n        }\n      });\n    }\n\n    /**\n     * Creates a function that invokes the predicate properties of `source` with\n     * the corresponding property values of a given object, returning `true` if\n     * all predicates return truthy, else `false`.\n     *\n     * **Note:** The created function is equivalent to `_.conformsTo` with\n     * `source` partially applied.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {Object} source The object of property predicates to conform to.\n     * @returns {Function} Returns the new spec function.\n     * @example\n     *\n     * var objects = [\n     *   { 'a': 2, 'b': 1 },\n     *   { 'a': 1, 'b': 2 }\n     * ];\n     *\n     * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));\n     * // => [{ 'a': 1, 'b': 2 }]\n     */\n    function conforms(source) {\n      return baseConforms(baseClone(source, CLONE_DEEP_FLAG));\n    }\n\n    /**\n     * Creates a function that returns `value`.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.4.0\n     * @category Util\n     * @param {*} value The value to return from the new function.\n     * @returns {Function} Returns the new constant function.\n     * @example\n     *\n     * var objects = _.times(2, _.constant({ 'a': 1 }));\n     *\n     * console.log(objects);\n     * // => [{ 'a': 1 }, { 'a': 1 }]\n     *\n     * console.log(objects[0] === objects[1]);\n     * // => true\n     */\n    function constant(value) {\n      return function() {\n        return value;\n      };\n    }\n\n    /**\n     * Checks `value` to determine whether a default value should be returned in\n     * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,\n     * or `undefined`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.14.0\n     * @category Util\n     * @param {*} value The value to check.\n     * @param {*} defaultValue The default value.\n     * @returns {*} Returns the resolved value.\n     * @example\n     *\n     * _.defaultTo(1, 10);\n     * // => 1\n     *\n     * _.defaultTo(undefined, 10);\n     * // => 10\n     */\n    function defaultTo(value, defaultValue) {\n      return (value == null || value !== value) ? defaultValue : value;\n    }\n\n    /**\n     * Creates a function that returns the result of invoking the given functions\n     * with the `this` binding of the created function, where each successive\n     * invocation is supplied the return value of the previous.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Util\n     * @param {...(Function|Function[])} [funcs] The functions to invoke.\n     * @returns {Function} Returns the new composite function.\n     * @see _.flowRight\n     * @example\n     *\n     * function square(n) {\n     *   return n * n;\n     * }\n     *\n     * var addSquare = _.flow([_.add, square]);\n     * addSquare(1, 2);\n     * // => 9\n     */\n    var flow = createFlow();\n\n    /**\n     * This method is like `_.flow` except that it creates a function that\n     * invokes the given functions from right to left.\n     *\n     * @static\n     * @since 3.0.0\n     * @memberOf _\n     * @category Util\n     * @param {...(Function|Function[])} [funcs] The functions to invoke.\n     * @returns {Function} Returns the new composite function.\n     * @see _.flow\n     * @example\n     *\n     * function square(n) {\n     *   return n * n;\n     * }\n     *\n     * var addSquare = _.flowRight([square, _.add]);\n     * addSquare(1, 2);\n     * // => 9\n     */\n    var flowRight = createFlow(true);\n\n    /**\n     * This method returns the first argument it receives.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Util\n     * @param {*} value Any value.\n     * @returns {*} Returns `value`.\n     * @example\n     *\n     * var object = { 'a': 1 };\n     *\n     * console.log(_.identity(object) === object);\n     * // => true\n     */\n    function identity(value) {\n      return value;\n    }\n\n    /**\n     * Creates a function that invokes `func` with the arguments of the created\n     * function. If `func` is a property name, the created function returns the\n     * property value for a given element. If `func` is an array or object, the\n     * created function returns `true` for elements that contain the equivalent\n     * source properties, otherwise it returns `false`.\n     *\n     * @static\n     * @since 4.0.0\n     * @memberOf _\n     * @category Util\n     * @param {*} [func=_.identity] The value to convert to a callback.\n     * @returns {Function} Returns the callback.\n     * @example\n     *\n     * var users = [\n     *   { 'user': 'barney', 'age': 36, 'active': true },\n     *   { 'user': 'fred',   'age': 40, 'active': false }\n     * ];\n     *\n     * // The `_.matches` iteratee shorthand.\n     * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));\n     * // => [{ 'user': 'barney', 'age': 36, 'active': true }]\n     *\n     * // The `_.matchesProperty` iteratee shorthand.\n     * _.filter(users, _.iteratee(['user', 'fred']));\n     * // => [{ 'user': 'fred', 'age': 40 }]\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.map(users, _.iteratee('user'));\n     * // => ['barney', 'fred']\n     *\n     * // Create custom iteratee shorthands.\n     * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {\n     *   return !_.isRegExp(func) ? iteratee(func) : function(string) {\n     *     return func.test(string);\n     *   };\n     * });\n     *\n     * _.filter(['abc', 'def'], /ef/);\n     * // => ['def']\n     */\n    function iteratee(func) {\n      return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));\n    }\n\n    /**\n     * Creates a function that performs a partial deep comparison between a given\n     * object and `source`, returning `true` if the given object has equivalent\n     * property values, else `false`.\n     *\n     * **Note:** The created function is equivalent to `_.isMatch` with `source`\n     * partially applied.\n     *\n     * Partial comparisons will match empty array and empty object `source`\n     * values against any array or object value, respectively. See `_.isEqual`\n     * for a list of supported value comparisons.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Util\n     * @param {Object} source The object of property values to match.\n     * @returns {Function} Returns the new spec function.\n     * @example\n     *\n     * var objects = [\n     *   { 'a': 1, 'b': 2, 'c': 3 },\n     *   { 'a': 4, 'b': 5, 'c': 6 }\n     * ];\n     *\n     * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));\n     * // => [{ 'a': 4, 'b': 5, 'c': 6 }]\n     */\n    function matches(source) {\n      return baseMatches(baseClone(source, CLONE_DEEP_FLAG));\n    }\n\n    /**\n     * Creates a function that performs a partial deep comparison between the\n     * value at `path` of a given object to `srcValue`, returning `true` if the\n     * object value is equivalent, else `false`.\n     *\n     * **Note:** Partial comparisons will match empty array and empty object\n     * `srcValue` values against any array or object value, respectively. See\n     * `_.isEqual` for a list of supported value comparisons.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.2.0\n     * @category Util\n     * @param {Array|string} path The path of the property to get.\n     * @param {*} srcValue The value to match.\n     * @returns {Function} Returns the new spec function.\n     * @example\n     *\n     * var objects = [\n     *   { 'a': 1, 'b': 2, 'c': 3 },\n     *   { 'a': 4, 'b': 5, 'c': 6 }\n     * ];\n     *\n     * _.find(objects, _.matchesProperty('a', 4));\n     * // => { 'a': 4, 'b': 5, 'c': 6 }\n     */\n    function matchesProperty(path, srcValue) {\n      return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));\n    }\n\n    /**\n     * Creates a function that invokes the method at `path` of a given object.\n     * Any additional arguments are provided to the invoked method.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.7.0\n     * @category Util\n     * @param {Array|string} path The path of the method to invoke.\n     * @param {...*} [args] The arguments to invoke the method with.\n     * @returns {Function} Returns the new invoker function.\n     * @example\n     *\n     * var objects = [\n     *   { 'a': { 'b': _.constant(2) } },\n     *   { 'a': { 'b': _.constant(1) } }\n     * ];\n     *\n     * _.map(objects, _.method('a.b'));\n     * // => [2, 1]\n     *\n     * _.map(objects, _.method(['a', 'b']));\n     * // => [2, 1]\n     */\n    var method = baseRest(function(path, args) {\n      return function(object) {\n        return baseInvoke(object, path, args);\n      };\n    });\n\n    /**\n     * The opposite of `_.method`; this method creates a function that invokes\n     * the method at a given path of `object`. Any additional arguments are\n     * provided to the invoked method.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.7.0\n     * @category Util\n     * @param {Object} object The object to query.\n     * @param {...*} [args] The arguments to invoke the method with.\n     * @returns {Function} Returns the new invoker function.\n     * @example\n     *\n     * var array = _.times(3, _.constant),\n     *     object = { 'a': array, 'b': array, 'c': array };\n     *\n     * _.map(['a[2]', 'c[0]'], _.methodOf(object));\n     * // => [2, 0]\n     *\n     * _.map([['a', '2'], ['c', '0']], _.methodOf(object));\n     * // => [2, 0]\n     */\n    var methodOf = baseRest(function(object, args) {\n      return function(path) {\n        return baseInvoke(object, path, args);\n      };\n    });\n\n    /**\n     * Adds all own enumerable string keyed function properties of a source\n     * object to the destination object. If `object` is a function, then methods\n     * are added to its prototype as well.\n     *\n     * **Note:** Use `_.runInContext` to create a pristine `lodash` function to\n     * avoid conflicts caused by modifying the original.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Util\n     * @param {Function|Object} [object=lodash] The destination object.\n     * @param {Object} source The object of functions to add.\n     * @param {Object} [options={}] The options object.\n     * @param {boolean} [options.chain=true] Specify whether mixins are chainable.\n     * @returns {Function|Object} Returns `object`.\n     * @example\n     *\n     * function vowels(string) {\n     *   return _.filter(string, function(v) {\n     *     return /[aeiou]/i.test(v);\n     *   });\n     * }\n     *\n     * _.mixin({ 'vowels': vowels });\n     * _.vowels('fred');\n     * // => ['e']\n     *\n     * _('fred').vowels().value();\n     * // => ['e']\n     *\n     * _.mixin({ 'vowels': vowels }, { 'chain': false });\n     * _('fred').vowels();\n     * // => ['e']\n     */\n    function mixin(object, source, options) {\n      var props = keys(source),\n          methodNames = baseFunctions(source, props);\n\n      if (options == null &&\n          !(isObject(source) && (methodNames.length || !props.length))) {\n        options = source;\n        source = object;\n        object = this;\n        methodNames = baseFunctions(source, keys(source));\n      }\n      var chain = !(isObject(options) && 'chain' in options) || !!options.chain,\n          isFunc = isFunction(object);\n\n      arrayEach(methodNames, function(methodName) {\n        var func = source[methodName];\n        object[methodName] = func;\n        if (isFunc) {\n          object.prototype[methodName] = function() {\n            var chainAll = this.__chain__;\n            if (chain || chainAll) {\n              var result = object(this.__wrapped__),\n                  actions = result.__actions__ = copyArray(this.__actions__);\n\n              actions.push({ 'func': func, 'args': arguments, 'thisArg': object });\n              result.__chain__ = chainAll;\n              return result;\n            }\n            return func.apply(object, arrayPush([this.value()], arguments));\n          };\n        }\n      });\n\n      return object;\n    }\n\n    /**\n     * Reverts the `_` variable to its previous value and returns a reference to\n     * the `lodash` function.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Util\n     * @returns {Function} Returns the `lodash` function.\n     * @example\n     *\n     * var lodash = _.noConflict();\n     */\n    function noConflict() {\n      if (root._ === this) {\n        root._ = oldDash;\n      }\n      return this;\n    }\n\n    /**\n     * This method returns `undefined`.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.3.0\n     * @category Util\n     * @example\n     *\n     * _.times(2, _.noop);\n     * // => [undefined, undefined]\n     */\n    function noop() {\n      // No operation performed.\n    }\n\n    /**\n     * Creates a function that gets the argument at index `n`. If `n` is negative,\n     * the nth argument from the end is returned.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {number} [n=0] The index of the argument to return.\n     * @returns {Function} Returns the new pass-thru function.\n     * @example\n     *\n     * var func = _.nthArg(1);\n     * func('a', 'b', 'c', 'd');\n     * // => 'b'\n     *\n     * var func = _.nthArg(-2);\n     * func('a', 'b', 'c', 'd');\n     * // => 'c'\n     */\n    function nthArg(n) {\n      n = toInteger(n);\n      return baseRest(function(args) {\n        return baseNth(args, n);\n      });\n    }\n\n    /**\n     * Creates a function that invokes `iteratees` with the arguments it receives\n     * and returns their results.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {...(Function|Function[])} [iteratees=[_.identity]]\n     *  The iteratees to invoke.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * var func = _.over([Math.max, Math.min]);\n     *\n     * func(1, 2, 3, 4);\n     * // => [4, 1]\n     */\n    var over = createOver(arrayMap);\n\n    /**\n     * Creates a function that checks if **all** of the `predicates` return\n     * truthy when invoked with the arguments it receives.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {...(Function|Function[])} [predicates=[_.identity]]\n     *  The predicates to check.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * var func = _.overEvery([Boolean, isFinite]);\n     *\n     * func('1');\n     * // => true\n     *\n     * func(null);\n     * // => false\n     *\n     * func(NaN);\n     * // => false\n     */\n    var overEvery = createOver(arrayEvery);\n\n    /**\n     * Creates a function that checks if **any** of the `predicates` return\n     * truthy when invoked with the arguments it receives.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {...(Function|Function[])} [predicates=[_.identity]]\n     *  The predicates to check.\n     * @returns {Function} Returns the new function.\n     * @example\n     *\n     * var func = _.overSome([Boolean, isFinite]);\n     *\n     * func('1');\n     * // => true\n     *\n     * func(null);\n     * // => true\n     *\n     * func(NaN);\n     * // => false\n     */\n    var overSome = createOver(arraySome);\n\n    /**\n     * Creates a function that returns the value at `path` of a given object.\n     *\n     * @static\n     * @memberOf _\n     * @since 2.4.0\n     * @category Util\n     * @param {Array|string} path The path of the property to get.\n     * @returns {Function} Returns the new accessor function.\n     * @example\n     *\n     * var objects = [\n     *   { 'a': { 'b': 2 } },\n     *   { 'a': { 'b': 1 } }\n     * ];\n     *\n     * _.map(objects, _.property('a.b'));\n     * // => [2, 1]\n     *\n     * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');\n     * // => [1, 2]\n     */\n    function property(path) {\n      return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);\n    }\n\n    /**\n     * The opposite of `_.property`; this method creates a function that returns\n     * the value at a given path of `object`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.0.0\n     * @category Util\n     * @param {Object} object The object to query.\n     * @returns {Function} Returns the new accessor function.\n     * @example\n     *\n     * var array = [0, 1, 2],\n     *     object = { 'a': array, 'b': array, 'c': array };\n     *\n     * _.map(['a[2]', 'c[0]'], _.propertyOf(object));\n     * // => [2, 0]\n     *\n     * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));\n     * // => [2, 0]\n     */\n    function propertyOf(object) {\n      return function(path) {\n        return object == null ? undefined : baseGet(object, path);\n      };\n    }\n\n    /**\n     * Creates an array of numbers (positive and/or negative) progressing from\n     * `start` up to, but not including, `end`. A step of `-1` is used if a negative\n     * `start` is specified without an `end` or `step`. If `end` is not specified,\n     * it's set to `start` with `start` then set to `0`.\n     *\n     * **Note:** JavaScript follows the IEEE-754 standard for resolving\n     * floating-point values which can produce unexpected results.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Util\n     * @param {number} [start=0] The start of the range.\n     * @param {number} end The end of the range.\n     * @param {number} [step=1] The value to increment or decrement by.\n     * @returns {Array} Returns the range of numbers.\n     * @see _.inRange, _.rangeRight\n     * @example\n     *\n     * _.range(4);\n     * // => [0, 1, 2, 3]\n     *\n     * _.range(-4);\n     * // => [0, -1, -2, -3]\n     *\n     * _.range(1, 5);\n     * // => [1, 2, 3, 4]\n     *\n     * _.range(0, 20, 5);\n     * // => [0, 5, 10, 15]\n     *\n     * _.range(0, -4, -1);\n     * // => [0, -1, -2, -3]\n     *\n     * _.range(1, 4, 0);\n     * // => [1, 1, 1]\n     *\n     * _.range(0);\n     * // => []\n     */\n    var range = createRange();\n\n    /**\n     * This method is like `_.range` except that it populates values in\n     * descending order.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {number} [start=0] The start of the range.\n     * @param {number} end The end of the range.\n     * @param {number} [step=1] The value to increment or decrement by.\n     * @returns {Array} Returns the range of numbers.\n     * @see _.inRange, _.range\n     * @example\n     *\n     * _.rangeRight(4);\n     * // => [3, 2, 1, 0]\n     *\n     * _.rangeRight(-4);\n     * // => [-3, -2, -1, 0]\n     *\n     * _.rangeRight(1, 5);\n     * // => [4, 3, 2, 1]\n     *\n     * _.rangeRight(0, 20, 5);\n     * // => [15, 10, 5, 0]\n     *\n     * _.rangeRight(0, -4, -1);\n     * // => [-3, -2, -1, 0]\n     *\n     * _.rangeRight(1, 4, 0);\n     * // => [1, 1, 1]\n     *\n     * _.rangeRight(0);\n     * // => []\n     */\n    var rangeRight = createRange(true);\n\n    /**\n     * This method returns a new empty array.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.13.0\n     * @category Util\n     * @returns {Array} Returns the new empty array.\n     * @example\n     *\n     * var arrays = _.times(2, _.stubArray);\n     *\n     * console.log(arrays);\n     * // => [[], []]\n     *\n     * console.log(arrays[0] === arrays[1]);\n     * // => false\n     */\n    function stubArray() {\n      return [];\n    }\n\n    /**\n     * This method returns `false`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.13.0\n     * @category Util\n     * @returns {boolean} Returns `false`.\n     * @example\n     *\n     * _.times(2, _.stubFalse);\n     * // => [false, false]\n     */\n    function stubFalse() {\n      return false;\n    }\n\n    /**\n     * This method returns a new empty object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.13.0\n     * @category Util\n     * @returns {Object} Returns the new empty object.\n     * @example\n     *\n     * var objects = _.times(2, _.stubObject);\n     *\n     * console.log(objects);\n     * // => [{}, {}]\n     *\n     * console.log(objects[0] === objects[1]);\n     * // => false\n     */\n    function stubObject() {\n      return {};\n    }\n\n    /**\n     * This method returns an empty string.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.13.0\n     * @category Util\n     * @returns {string} Returns the empty string.\n     * @example\n     *\n     * _.times(2, _.stubString);\n     * // => ['', '']\n     */\n    function stubString() {\n      return '';\n    }\n\n    /**\n     * This method returns `true`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.13.0\n     * @category Util\n     * @returns {boolean} Returns `true`.\n     * @example\n     *\n     * _.times(2, _.stubTrue);\n     * // => [true, true]\n     */\n    function stubTrue() {\n      return true;\n    }\n\n    /**\n     * Invokes the iteratee `n` times, returning an array of the results of\n     * each invocation. The iteratee is invoked with one argument; (index).\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Util\n     * @param {number} n The number of times to invoke `iteratee`.\n     * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n     * @returns {Array} Returns the array of results.\n     * @example\n     *\n     * _.times(3, String);\n     * // => ['0', '1', '2']\n     *\n     *  _.times(4, _.constant(0));\n     * // => [0, 0, 0, 0]\n     */\n    function times(n, iteratee) {\n      n = toInteger(n);\n      if (n < 1 || n > MAX_SAFE_INTEGER) {\n        return [];\n      }\n      var index = MAX_ARRAY_LENGTH,\n          length = nativeMin(n, MAX_ARRAY_LENGTH);\n\n      iteratee = getIteratee(iteratee);\n      n -= MAX_ARRAY_LENGTH;\n\n      var result = baseTimes(length, iteratee);\n      while (++index < n) {\n        iteratee(index);\n      }\n      return result;\n    }\n\n    /**\n     * Converts `value` to a property path array.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Util\n     * @param {*} value The value to convert.\n     * @returns {Array} Returns the new property path array.\n     * @example\n     *\n     * _.toPath('a.b.c');\n     * // => ['a', 'b', 'c']\n     *\n     * _.toPath('a[0].b.c');\n     * // => ['a', '0', 'b', 'c']\n     */\n    function toPath(value) {\n      if (isArray(value)) {\n        return arrayMap(value, toKey);\n      }\n      return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));\n    }\n\n    /**\n     * Generates a unique ID. If `prefix` is given, the ID is appended to it.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Util\n     * @param {string} [prefix=''] The value to prefix the ID with.\n     * @returns {string} Returns the unique ID.\n     * @example\n     *\n     * _.uniqueId('contact_');\n     * // => 'contact_104'\n     *\n     * _.uniqueId();\n     * // => '105'\n     */\n    function uniqueId(prefix) {\n      var id = ++idCounter;\n      return toString(prefix) + id;\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * Adds two numbers.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.4.0\n     * @category Math\n     * @param {number} augend The first number in an addition.\n     * @param {number} addend The second number in an addition.\n     * @returns {number} Returns the total.\n     * @example\n     *\n     * _.add(6, 4);\n     * // => 10\n     */\n    var add = createMathOperation(function(augend, addend) {\n      return augend + addend;\n    }, 0);\n\n    /**\n     * Computes `number` rounded up to `precision`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.10.0\n     * @category Math\n     * @param {number} number The number to round up.\n     * @param {number} [precision=0] The precision to round up to.\n     * @returns {number} Returns the rounded up number.\n     * @example\n     *\n     * _.ceil(4.006);\n     * // => 5\n     *\n     * _.ceil(6.004, 2);\n     * // => 6.01\n     *\n     * _.ceil(6040, -2);\n     * // => 6100\n     */\n    var ceil = createRound('ceil');\n\n    /**\n     * Divide two numbers.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.7.0\n     * @category Math\n     * @param {number} dividend The first number in a division.\n     * @param {number} divisor The second number in a division.\n     * @returns {number} Returns the quotient.\n     * @example\n     *\n     * _.divide(6, 4);\n     * // => 1.5\n     */\n    var divide = createMathOperation(function(dividend, divisor) {\n      return dividend / divisor;\n    }, 1);\n\n    /**\n     * Computes `number` rounded down to `precision`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.10.0\n     * @category Math\n     * @param {number} number The number to round down.\n     * @param {number} [precision=0] The precision to round down to.\n     * @returns {number} Returns the rounded down number.\n     * @example\n     *\n     * _.floor(4.006);\n     * // => 4\n     *\n     * _.floor(0.046, 2);\n     * // => 0.04\n     *\n     * _.floor(4060, -2);\n     * // => 4000\n     */\n    var floor = createRound('floor');\n\n    /**\n     * Computes the maximum value of `array`. If `array` is empty or falsey,\n     * `undefined` is returned.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @returns {*} Returns the maximum value.\n     * @example\n     *\n     * _.max([4, 2, 8, 6]);\n     * // => 8\n     *\n     * _.max([]);\n     * // => undefined\n     */\n    function max(array) {\n      return (array && array.length)\n        ? baseExtremum(array, identity, baseGt)\n        : undefined;\n    }\n\n    /**\n     * This method is like `_.max` except that it accepts `iteratee` which is\n     * invoked for each element in `array` to generate the criterion by which\n     * the value is ranked. The iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {*} Returns the maximum value.\n     * @example\n     *\n     * var objects = [{ 'n': 1 }, { 'n': 2 }];\n     *\n     * _.maxBy(objects, function(o) { return o.n; });\n     * // => { 'n': 2 }\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.maxBy(objects, 'n');\n     * // => { 'n': 2 }\n     */\n    function maxBy(array, iteratee) {\n      return (array && array.length)\n        ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)\n        : undefined;\n    }\n\n    /**\n     * Computes the mean of the values in `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @returns {number} Returns the mean.\n     * @example\n     *\n     * _.mean([4, 2, 8, 6]);\n     * // => 5\n     */\n    function mean(array) {\n      return baseMean(array, identity);\n    }\n\n    /**\n     * This method is like `_.mean` except that it accepts `iteratee` which is\n     * invoked for each element in `array` to generate the value to be averaged.\n     * The iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.7.0\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {number} Returns the mean.\n     * @example\n     *\n     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];\n     *\n     * _.meanBy(objects, function(o) { return o.n; });\n     * // => 5\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.meanBy(objects, 'n');\n     * // => 5\n     */\n    function meanBy(array, iteratee) {\n      return baseMean(array, getIteratee(iteratee, 2));\n    }\n\n    /**\n     * Computes the minimum value of `array`. If `array` is empty or falsey,\n     * `undefined` is returned.\n     *\n     * @static\n     * @since 0.1.0\n     * @memberOf _\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @returns {*} Returns the minimum value.\n     * @example\n     *\n     * _.min([4, 2, 8, 6]);\n     * // => 2\n     *\n     * _.min([]);\n     * // => undefined\n     */\n    function min(array) {\n      return (array && array.length)\n        ? baseExtremum(array, identity, baseLt)\n        : undefined;\n    }\n\n    /**\n     * This method is like `_.min` except that it accepts `iteratee` which is\n     * invoked for each element in `array` to generate the criterion by which\n     * the value is ranked. The iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {*} Returns the minimum value.\n     * @example\n     *\n     * var objects = [{ 'n': 1 }, { 'n': 2 }];\n     *\n     * _.minBy(objects, function(o) { return o.n; });\n     * // => { 'n': 1 }\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.minBy(objects, 'n');\n     * // => { 'n': 1 }\n     */\n    function minBy(array, iteratee) {\n      return (array && array.length)\n        ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)\n        : undefined;\n    }\n\n    /**\n     * Multiply two numbers.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.7.0\n     * @category Math\n     * @param {number} multiplier The first number in a multiplication.\n     * @param {number} multiplicand The second number in a multiplication.\n     * @returns {number} Returns the product.\n     * @example\n     *\n     * _.multiply(6, 4);\n     * // => 24\n     */\n    var multiply = createMathOperation(function(multiplier, multiplicand) {\n      return multiplier * multiplicand;\n    }, 1);\n\n    /**\n     * Computes `number` rounded to `precision`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.10.0\n     * @category Math\n     * @param {number} number The number to round.\n     * @param {number} [precision=0] The precision to round to.\n     * @returns {number} Returns the rounded number.\n     * @example\n     *\n     * _.round(4.006);\n     * // => 4\n     *\n     * _.round(4.006, 2);\n     * // => 4.01\n     *\n     * _.round(4060, -2);\n     * // => 4100\n     */\n    var round = createRound('round');\n\n    /**\n     * Subtract two numbers.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Math\n     * @param {number} minuend The first number in a subtraction.\n     * @param {number} subtrahend The second number in a subtraction.\n     * @returns {number} Returns the difference.\n     * @example\n     *\n     * _.subtract(6, 4);\n     * // => 2\n     */\n    var subtract = createMathOperation(function(minuend, subtrahend) {\n      return minuend - subtrahend;\n    }, 0);\n\n    /**\n     * Computes the sum of the values in `array`.\n     *\n     * @static\n     * @memberOf _\n     * @since 3.4.0\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @returns {number} Returns the sum.\n     * @example\n     *\n     * _.sum([4, 2, 8, 6]);\n     * // => 20\n     */\n    function sum(array) {\n      return (array && array.length)\n        ? baseSum(array, identity)\n        : 0;\n    }\n\n    /**\n     * This method is like `_.sum` except that it accepts `iteratee` which is\n     * invoked for each element in `array` to generate the value to be summed.\n     * The iteratee is invoked with one argument: (value).\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Math\n     * @param {Array} array The array to iterate over.\n     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n     * @returns {number} Returns the sum.\n     * @example\n     *\n     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];\n     *\n     * _.sumBy(objects, function(o) { return o.n; });\n     * // => 20\n     *\n     * // The `_.property` iteratee shorthand.\n     * _.sumBy(objects, 'n');\n     * // => 20\n     */\n    function sumBy(array, iteratee) {\n      return (array && array.length)\n        ? baseSum(array, getIteratee(iteratee, 2))\n        : 0;\n    }\n\n    /*------------------------------------------------------------------------*/\n\n    // Add methods that return wrapped values in chain sequences.\n    lodash.after = after;\n    lodash.ary = ary;\n    lodash.assign = assign;\n    lodash.assignIn = assignIn;\n    lodash.assignInWith = assignInWith;\n    lodash.assignWith = assignWith;\n    lodash.at = at;\n    lodash.before = before;\n    lodash.bind = bind;\n    lodash.bindAll = bindAll;\n    lodash.bindKey = bindKey;\n    lodash.castArray = castArray;\n    lodash.chain = chain;\n    lodash.chunk = chunk;\n    lodash.compact = compact;\n    lodash.concat = concat;\n    lodash.cond = cond;\n    lodash.conforms = conforms;\n    lodash.constant = constant;\n    lodash.countBy = countBy;\n    lodash.create = create;\n    lodash.curry = curry;\n    lodash.curryRight = curryRight;\n    lodash.debounce = debounce;\n    lodash.defaults = defaults;\n    lodash.defaultsDeep = defaultsDeep;\n    lodash.defer = defer;\n    lodash.delay = delay;\n    lodash.difference = difference;\n    lodash.differenceBy = differenceBy;\n    lodash.differenceWith = differenceWith;\n    lodash.drop = drop;\n    lodash.dropRight = dropRight;\n    lodash.dropRightWhile = dropRightWhile;\n    lodash.dropWhile = dropWhile;\n    lodash.fill = fill;\n    lodash.filter = filter;\n    lodash.flatMap = flatMap;\n    lodash.flatMapDeep = flatMapDeep;\n    lodash.flatMapDepth = flatMapDepth;\n    lodash.flatten = flatten;\n    lodash.flattenDeep = flattenDeep;\n    lodash.flattenDepth = flattenDepth;\n    lodash.flip = flip;\n    lodash.flow = flow;\n    lodash.flowRight = flowRight;\n    lodash.fromPairs = fromPairs;\n    lodash.functions = functions;\n    lodash.functionsIn = functionsIn;\n    lodash.groupBy = groupBy;\n    lodash.initial = initial;\n    lodash.intersection = intersection;\n    lodash.intersectionBy = intersectionBy;\n    lodash.intersectionWith = intersectionWith;\n    lodash.invert = invert;\n    lodash.invertBy = invertBy;\n    lodash.invokeMap = invokeMap;\n    lodash.iteratee = iteratee;\n    lodash.keyBy = keyBy;\n    lodash.keys = keys;\n    lodash.keysIn = keysIn;\n    lodash.map = map;\n    lodash.mapKeys = mapKeys;\n    lodash.mapValues = mapValues;\n    lodash.matches = matches;\n    lodash.matchesProperty = matchesProperty;\n    lodash.memoize = memoize;\n    lodash.merge = merge;\n    lodash.mergeWith = mergeWith;\n    lodash.method = method;\n    lodash.methodOf = methodOf;\n    lodash.mixin = mixin;\n    lodash.negate = negate;\n    lodash.nthArg = nthArg;\n    lodash.omit = omit;\n    lodash.omitBy = omitBy;\n    lodash.once = once;\n    lodash.orderBy = orderBy;\n    lodash.over = over;\n    lodash.overArgs = overArgs;\n    lodash.overEvery = overEvery;\n    lodash.overSome = overSome;\n    lodash.partial = partial;\n    lodash.partialRight = partialRight;\n    lodash.partition = partition;\n    lodash.pick = pick;\n    lodash.pickBy = pickBy;\n    lodash.property = property;\n    lodash.propertyOf = propertyOf;\n    lodash.pull = pull;\n    lodash.pullAll = pullAll;\n    lodash.pullAllBy = pullAllBy;\n    lodash.pullAllWith = pullAllWith;\n    lodash.pullAt = pullAt;\n    lodash.range = range;\n    lodash.rangeRight = rangeRight;\n    lodash.rearg = rearg;\n    lodash.reject = reject;\n    lodash.remove = remove;\n    lodash.rest = rest;\n    lodash.reverse = reverse;\n    lodash.sampleSize = sampleSize;\n    lodash.set = set;\n    lodash.setWith = setWith;\n    lodash.shuffle = shuffle;\n    lodash.slice = slice;\n    lodash.sortBy = sortBy;\n    lodash.sortedUniq = sortedUniq;\n    lodash.sortedUniqBy = sortedUniqBy;\n    lodash.split = split;\n    lodash.spread = spread;\n    lodash.tail = tail;\n    lodash.take = take;\n    lodash.takeRight = takeRight;\n    lodash.takeRightWhile = takeRightWhile;\n    lodash.takeWhile = takeWhile;\n    lodash.tap = tap;\n    lodash.throttle = throttle;\n    lodash.thru = thru;\n    lodash.toArray = toArray;\n    lodash.toPairs = toPairs;\n    lodash.toPairsIn = toPairsIn;\n    lodash.toPath = toPath;\n    lodash.toPlainObject = toPlainObject;\n    lodash.transform = transform;\n    lodash.unary = unary;\n    lodash.union = union;\n    lodash.unionBy = unionBy;\n    lodash.unionWith = unionWith;\n    lodash.uniq = uniq;\n    lodash.uniqBy = uniqBy;\n    lodash.uniqWith = uniqWith;\n    lodash.unset = unset;\n    lodash.unzip = unzip;\n    lodash.unzipWith = unzipWith;\n    lodash.update = update;\n    lodash.updateWith = updateWith;\n    lodash.values = values;\n    lodash.valuesIn = valuesIn;\n    lodash.without = without;\n    lodash.words = words;\n    lodash.wrap = wrap;\n    lodash.xor = xor;\n    lodash.xorBy = xorBy;\n    lodash.xorWith = xorWith;\n    lodash.zip = zip;\n    lodash.zipObject = zipObject;\n    lodash.zipObjectDeep = zipObjectDeep;\n    lodash.zipWith = zipWith;\n\n    // Add aliases.\n    lodash.entries = toPairs;\n    lodash.entriesIn = toPairsIn;\n    lodash.extend = assignIn;\n    lodash.extendWith = assignInWith;\n\n    // Add methods to `lodash.prototype`.\n    mixin(lodash, lodash);\n\n    /*------------------------------------------------------------------------*/\n\n    // Add methods that return unwrapped values in chain sequences.\n    lodash.add = add;\n    lodash.attempt = attempt;\n    lodash.camelCase = camelCase;\n    lodash.capitalize = capitalize;\n    lodash.ceil = ceil;\n    lodash.clamp = clamp;\n    lodash.clone = clone;\n    lodash.cloneDeep = cloneDeep;\n    lodash.cloneDeepWith = cloneDeepWith;\n    lodash.cloneWith = cloneWith;\n    lodash.conformsTo = conformsTo;\n    lodash.deburr = deburr;\n    lodash.defaultTo = defaultTo;\n    lodash.divide = divide;\n    lodash.endsWith = endsWith;\n    lodash.eq = eq;\n    lodash.escape = escape;\n    lodash.escapeRegExp = escapeRegExp;\n    lodash.every = every;\n    lodash.find = find;\n    lodash.findIndex = findIndex;\n    lodash.findKey = findKey;\n    lodash.findLast = findLast;\n    lodash.findLastIndex = findLastIndex;\n    lodash.findLastKey = findLastKey;\n    lodash.floor = floor;\n    lodash.forEach = forEach;\n    lodash.forEachRight = forEachRight;\n    lodash.forIn = forIn;\n    lodash.forInRight = forInRight;\n    lodash.forOwn = forOwn;\n    lodash.forOwnRight = forOwnRight;\n    lodash.get = get;\n    lodash.gt = gt;\n    lodash.gte = gte;\n    lodash.has = has;\n    lodash.hasIn = hasIn;\n    lodash.head = head;\n    lodash.identity = identity;\n    lodash.includes = includes;\n    lodash.indexOf = indexOf;\n    lodash.inRange = inRange;\n    lodash.invoke = invoke;\n    lodash.isArguments = isArguments;\n    lodash.isArray = isArray;\n    lodash.isArrayBuffer = isArrayBuffer;\n    lodash.isArrayLike = isArrayLike;\n    lodash.isArrayLikeObject = isArrayLikeObject;\n    lodash.isBoolean = isBoolean;\n    lodash.isBuffer = isBuffer;\n    lodash.isDate = isDate;\n    lodash.isElement = isElement;\n    lodash.isEmpty = isEmpty;\n    lodash.isEqual = isEqual;\n    lodash.isEqualWith = isEqualWith;\n    lodash.isError = isError;\n    lodash.isFinite = isFinite;\n    lodash.isFunction = isFunction;\n    lodash.isInteger = isInteger;\n    lodash.isLength = isLength;\n    lodash.isMap = isMap;\n    lodash.isMatch = isMatch;\n    lodash.isMatchWith = isMatchWith;\n    lodash.isNaN = isNaN;\n    lodash.isNative = isNative;\n    lodash.isNil = isNil;\n    lodash.isNull = isNull;\n    lodash.isNumber = isNumber;\n    lodash.isObject = isObject;\n    lodash.isObjectLike = isObjectLike;\n    lodash.isPlainObject = isPlainObject;\n    lodash.isRegExp = isRegExp;\n    lodash.isSafeInteger = isSafeInteger;\n    lodash.isSet = isSet;\n    lodash.isString = isString;\n    lodash.isSymbol = isSymbol;\n    lodash.isTypedArray = isTypedArray;\n    lodash.isUndefined = isUndefined;\n    lodash.isWeakMap = isWeakMap;\n    lodash.isWeakSet = isWeakSet;\n    lodash.join = join;\n    lodash.kebabCase = kebabCase;\n    lodash.last = last;\n    lodash.lastIndexOf = lastIndexOf;\n    lodash.lowerCase = lowerCase;\n    lodash.lowerFirst = lowerFirst;\n    lodash.lt = lt;\n    lodash.lte = lte;\n    lodash.max = max;\n    lodash.maxBy = maxBy;\n    lodash.mean = mean;\n    lodash.meanBy = meanBy;\n    lodash.min = min;\n    lodash.minBy = minBy;\n    lodash.stubArray = stubArray;\n    lodash.stubFalse = stubFalse;\n    lodash.stubObject = stubObject;\n    lodash.stubString = stubString;\n    lodash.stubTrue = stubTrue;\n    lodash.multiply = multiply;\n    lodash.nth = nth;\n    lodash.noConflict = noConflict;\n    lodash.noop = noop;\n    lodash.now = now;\n    lodash.pad = pad;\n    lodash.padEnd = padEnd;\n    lodash.padStart = padStart;\n    lodash.parseInt = parseInt;\n    lodash.random = random;\n    lodash.reduce = reduce;\n    lodash.reduceRight = reduceRight;\n    lodash.repeat = repeat;\n    lodash.replace = replace;\n    lodash.result = result;\n    lodash.round = round;\n    lodash.runInContext = runInContext;\n    lodash.sample = sample;\n    lodash.size = size;\n    lodash.snakeCase = snakeCase;\n    lodash.some = some;\n    lodash.sortedIndex = sortedIndex;\n    lodash.sortedIndexBy = sortedIndexBy;\n    lodash.sortedIndexOf = sortedIndexOf;\n    lodash.sortedLastIndex = sortedLastIndex;\n    lodash.sortedLastIndexBy = sortedLastIndexBy;\n    lodash.sortedLastIndexOf = sortedLastIndexOf;\n    lodash.startCase = startCase;\n    lodash.startsWith = startsWith;\n    lodash.subtract = subtract;\n    lodash.sum = sum;\n    lodash.sumBy = sumBy;\n    lodash.template = template;\n    lodash.times = times;\n    lodash.toFinite = toFinite;\n    lodash.toInteger = toInteger;\n    lodash.toLength = toLength;\n    lodash.toLower = toLower;\n    lodash.toNumber = toNumber;\n    lodash.toSafeInteger = toSafeInteger;\n    lodash.toString = toString;\n    lodash.toUpper = toUpper;\n    lodash.trim = trim;\n    lodash.trimEnd = trimEnd;\n    lodash.trimStart = trimStart;\n    lodash.truncate = truncate;\n    lodash.unescape = unescape;\n    lodash.uniqueId = uniqueId;\n    lodash.upperCase = upperCase;\n    lodash.upperFirst = upperFirst;\n\n    // Add aliases.\n    lodash.each = forEach;\n    lodash.eachRight = forEachRight;\n    lodash.first = head;\n\n    mixin(lodash, (function() {\n      var source = {};\n      baseForOwn(lodash, function(func, methodName) {\n        if (!hasOwnProperty.call(lodash.prototype, methodName)) {\n          source[methodName] = func;\n        }\n      });\n      return source;\n    }()), { 'chain': false });\n\n    /*------------------------------------------------------------------------*/\n\n    /**\n     * The semantic version number.\n     *\n     * @static\n     * @memberOf _\n     * @type {string}\n     */\n    lodash.VERSION = VERSION;\n\n    // Assign default placeholders.\n    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {\n      lodash[methodName].placeholder = lodash;\n    });\n\n    // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.\n    arrayEach(['drop', 'take'], function(methodName, index) {\n      LazyWrapper.prototype[methodName] = function(n) {\n        n = n === undefined ? 1 : nativeMax(toInteger(n), 0);\n\n        var result = (this.__filtered__ && !index)\n          ? new LazyWrapper(this)\n          : this.clone();\n\n        if (result.__filtered__) {\n          result.__takeCount__ = nativeMin(n, result.__takeCount__);\n        } else {\n          result.__views__.push({\n            'size': nativeMin(n, MAX_ARRAY_LENGTH),\n            'type': methodName + (result.__dir__ < 0 ? 'Right' : '')\n          });\n        }\n        return result;\n      };\n\n      LazyWrapper.prototype[methodName + 'Right'] = function(n) {\n        return this.reverse()[methodName](n).reverse();\n      };\n    });\n\n    // Add `LazyWrapper` methods that accept an `iteratee` value.\n    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {\n      var type = index + 1,\n          isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;\n\n      LazyWrapper.prototype[methodName] = function(iteratee) {\n        var result = this.clone();\n        result.__iteratees__.push({\n          'iteratee': getIteratee(iteratee, 3),\n          'type': type\n        });\n        result.__filtered__ = result.__filtered__ || isFilter;\n        return result;\n      };\n    });\n\n    // Add `LazyWrapper` methods for `_.head` and `_.last`.\n    arrayEach(['head', 'last'], function(methodName, index) {\n      var takeName = 'take' + (index ? 'Right' : '');\n\n      LazyWrapper.prototype[methodName] = function() {\n        return this[takeName](1).value()[0];\n      };\n    });\n\n    // Add `LazyWrapper` methods for `_.initial` and `_.tail`.\n    arrayEach(['initial', 'tail'], function(methodName, index) {\n      var dropName = 'drop' + (index ? '' : 'Right');\n\n      LazyWrapper.prototype[methodName] = function() {\n        return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);\n      };\n    });\n\n    LazyWrapper.prototype.compact = function() {\n      return this.filter(identity);\n    };\n\n    LazyWrapper.prototype.find = function(predicate) {\n      return this.filter(predicate).head();\n    };\n\n    LazyWrapper.prototype.findLast = function(predicate) {\n      return this.reverse().find(predicate);\n    };\n\n    LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {\n      if (typeof path == 'function') {\n        return new LazyWrapper(this);\n      }\n      return this.map(function(value) {\n        return baseInvoke(value, path, args);\n      });\n    });\n\n    LazyWrapper.prototype.reject = function(predicate) {\n      return this.filter(negate(getIteratee(predicate)));\n    };\n\n    LazyWrapper.prototype.slice = function(start, end) {\n      start = toInteger(start);\n\n      var result = this;\n      if (result.__filtered__ && (start > 0 || end < 0)) {\n        return new LazyWrapper(result);\n      }\n      if (start < 0) {\n        result = result.takeRight(-start);\n      } else if (start) {\n        result = result.drop(start);\n      }\n      if (end !== undefined) {\n        end = toInteger(end);\n        result = end < 0 ? result.dropRight(-end) : result.take(end - start);\n      }\n      return result;\n    };\n\n    LazyWrapper.prototype.takeRightWhile = function(predicate) {\n      return this.reverse().takeWhile(predicate).reverse();\n    };\n\n    LazyWrapper.prototype.toArray = function() {\n      return this.take(MAX_ARRAY_LENGTH);\n    };\n\n    // Add `LazyWrapper` methods to `lodash.prototype`.\n    baseForOwn(LazyWrapper.prototype, function(func, methodName) {\n      var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),\n          isTaker = /^(?:head|last)$/.test(methodName),\n          lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],\n          retUnwrapped = isTaker || /^find/.test(methodName);\n\n      if (!lodashFunc) {\n        return;\n      }\n      lodash.prototype[methodName] = function() {\n        var value = this.__wrapped__,\n            args = isTaker ? [1] : arguments,\n            isLazy = value instanceof LazyWrapper,\n            iteratee = args[0],\n            useLazy = isLazy || isArray(value);\n\n        var interceptor = function(value) {\n          var result = lodashFunc.apply(lodash, arrayPush([value], args));\n          return (isTaker && chainAll) ? result[0] : result;\n        };\n\n        if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {\n          // Avoid lazy use if the iteratee has a \"length\" value other than `1`.\n          isLazy = useLazy = false;\n        }\n        var chainAll = this.__chain__,\n            isHybrid = !!this.__actions__.length,\n            isUnwrapped = retUnwrapped && !chainAll,\n            onlyLazy = isLazy && !isHybrid;\n\n        if (!retUnwrapped && useLazy) {\n          value = onlyLazy ? value : new LazyWrapper(this);\n          var result = func.apply(value, args);\n          result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });\n          return new LodashWrapper(result, chainAll);\n        }\n        if (isUnwrapped && onlyLazy) {\n          return func.apply(this, args);\n        }\n        result = this.thru(interceptor);\n        return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;\n      };\n    });\n\n    // Add `Array` methods to `lodash.prototype`.\n    arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {\n      var func = arrayProto[methodName],\n          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',\n          retUnwrapped = /^(?:pop|shift)$/.test(methodName);\n\n      lodash.prototype[methodName] = function() {\n        var args = arguments;\n        if (retUnwrapped && !this.__chain__) {\n          var value = this.value();\n          return func.apply(isArray(value) ? value : [], args);\n        }\n        return this[chainName](function(value) {\n          return func.apply(isArray(value) ? value : [], args);\n        });\n      };\n    });\n\n    // Map minified method names to their real names.\n    baseForOwn(LazyWrapper.prototype, function(func, methodName) {\n      var lodashFunc = lodash[methodName];\n      if (lodashFunc) {\n        var key = (lodashFunc.name + ''),\n            names = realNames[key] || (realNames[key] = []);\n\n        names.push({ 'name': methodName, 'func': lodashFunc });\n      }\n    });\n\n    realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{\n      'name': 'wrapper',\n      'func': undefined\n    }];\n\n    // Add methods to `LazyWrapper`.\n    LazyWrapper.prototype.clone = lazyClone;\n    LazyWrapper.prototype.reverse = lazyReverse;\n    LazyWrapper.prototype.value = lazyValue;\n\n    // Add chain sequence methods to the `lodash` wrapper.\n    lodash.prototype.at = wrapperAt;\n    lodash.prototype.chain = wrapperChain;\n    lodash.prototype.commit = wrapperCommit;\n    lodash.prototype.next = wrapperNext;\n    lodash.prototype.plant = wrapperPlant;\n    lodash.prototype.reverse = wrapperReverse;\n    lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;\n\n    // Add lazy aliases.\n    lodash.prototype.first = lodash.prototype.head;\n\n    if (symIterator) {\n      lodash.prototype[symIterator] = wrapperToIterator;\n    }\n    return lodash;\n  });\n\n  /*--------------------------------------------------------------------------*/\n\n  // Export lodash.\n  var _ = runInContext();\n\n  // Some AMD build optimizers, like r.js, check for condition patterns like:\n  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {\n    // Expose Lodash on the global object to prevent errors when Lodash is\n    // loaded by a script tag in the presence of an AMD loader.\n    // See http://requirejs.org/docs/errors.html#mismatch for more details.\n    // Use `_.noConflict` to remove Lodash from the global object.\n    root._ = _;\n\n    // Define as an anonymous module so, through path mapping, it can be\n    // referenced as the \"underscore\" module.\n    define(function() {\n      return _;\n    });\n  }\n  // Check for `exports` after `define` in case a build optimizer adds it.\n  else if (freeModule) {\n    // Export for Node.js.\n    (freeModule.exports = _)._ = _;\n    // Export for CommonJS support.\n    freeExports._ = _;\n  }\n  else {\n    // Export to the global object.\n    root._ = _;\n  }\n}.call(this));\n","/*! Native Promise Only\n    v0.8.1 (c) Kyle Simpson\n    MIT License: http://getify.mit-license.org\n*/\n\n(function UMD(name,context,definition){\n\t// special form of UMD for polyfilling across evironments\n\tcontext[name] = context[name] || definition();\n\tif (typeof module != \"undefined\" && module.exports) { module.exports = context[name]; }\n\telse if (typeof define == \"function\" && define.amd) { define(function $AMD$(){ return context[name]; }); }\n})(\"Promise\",typeof global != \"undefined\" ? global : this,function DEF(){\n\t/*jshint validthis:true */\n\t\"use strict\";\n\n\tvar builtInProp, cycle, scheduling_queue,\n\t\tToString = Object.prototype.toString,\n\t\ttimer = (typeof setImmediate != \"undefined\") ?\n\t\t\tfunction timer(fn) { return setImmediate(fn); } :\n\t\t\tsetTimeout\n\t;\n\n\t// dammit, IE8.\n\ttry {\n\t\tObject.defineProperty({},\"x\",{});\n\t\tbuiltInProp = function builtInProp(obj,name,val,config) {\n\t\t\treturn Object.defineProperty(obj,name,{\n\t\t\t\tvalue: val,\n\t\t\t\twritable: true,\n\t\t\t\tconfigurable: config !== false\n\t\t\t});\n\t\t};\n\t}\n\tcatch (err) {\n\t\tbuiltInProp = function builtInProp(obj,name,val) {\n\t\t\tobj[name] = val;\n\t\t\treturn obj;\n\t\t};\n\t}\n\n\t// Note: using a queue instead of array for efficiency\n\tscheduling_queue = (function Queue() {\n\t\tvar first, last, item;\n\n\t\tfunction Item(fn,self) {\n\t\t\tthis.fn = fn;\n\t\t\tthis.self = self;\n\t\t\tthis.next = void 0;\n\t\t}\n\n\t\treturn {\n\t\t\tadd: function add(fn,self) {\n\t\t\t\titem = new Item(fn,self);\n\t\t\t\tif (last) {\n\t\t\t\t\tlast.next = item;\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tfirst = item;\n\t\t\t\t}\n\t\t\t\tlast = item;\n\t\t\t\titem = void 0;\n\t\t\t},\n\t\t\tdrain: function drain() {\n\t\t\t\tvar f = first;\n\t\t\t\tfirst = last = cycle = void 0;\n\n\t\t\t\twhile (f) {\n\t\t\t\t\tf.fn.call(f.self);\n\t\t\t\t\tf = f.next;\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t})();\n\n\tfunction schedule(fn,self) {\n\t\tscheduling_queue.add(fn,self);\n\t\tif (!cycle) {\n\t\t\tcycle = timer(scheduling_queue.drain);\n\t\t}\n\t}\n\n\t// promise duck typing\n\tfunction isThenable(o) {\n\t\tvar _then, o_type = typeof o;\n\n\t\tif (o != null &&\n\t\t\t(\n\t\t\t\to_type == \"object\" || o_type == \"function\"\n\t\t\t)\n\t\t) {\n\t\t\t_then = o.then;\n\t\t}\n\t\treturn typeof _then == \"function\" ? _then : false;\n\t}\n\n\tfunction notify() {\n\t\tfor (var i=0; i<this.chain.length; i++) {\n\t\t\tnotifyIsolated(\n\t\t\t\tthis,\n\t\t\t\t(this.state === 1) ? this.chain[i].success : this.chain[i].failure,\n\t\t\t\tthis.chain[i]\n\t\t\t);\n\t\t}\n\t\tthis.chain.length = 0;\n\t}\n\n\t// NOTE: This is a separate function to isolate\n\t// the `try..catch` so that other code can be\n\t// optimized better\n\tfunction notifyIsolated(self,cb,chain) {\n\t\tvar ret, _then;\n\t\ttry {\n\t\t\tif (cb === false) {\n\t\t\t\tchain.reject(self.msg);\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif (cb === true) {\n\t\t\t\t\tret = self.msg;\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tret = cb.call(void 0,self.msg);\n\t\t\t\t}\n\n\t\t\t\tif (ret === chain.promise) {\n\t\t\t\t\tchain.reject(TypeError(\"Promise-chain cycle\"));\n\t\t\t\t}\n\t\t\t\telse if (_then = isThenable(ret)) {\n\t\t\t\t\t_then.call(ret,chain.resolve,chain.reject);\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tchain.resolve(ret);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tcatch (err) {\n\t\t\tchain.reject(err);\n\t\t}\n\t}\n\n\tfunction resolve(msg) {\n\t\tvar _then, self = this;\n\n\t\t// already triggered?\n\t\tif (self.triggered) { return; }\n\n\t\tself.triggered = true;\n\n\t\t// unwrap\n\t\tif (self.def) {\n\t\t\tself = self.def;\n\t\t}\n\n\t\ttry {\n\t\t\tif (_then = isThenable(msg)) {\n\t\t\t\tschedule(function(){\n\t\t\t\t\tvar def_wrapper = new MakeDefWrapper(self);\n\t\t\t\t\ttry {\n\t\t\t\t\t\t_then.call(msg,\n\t\t\t\t\t\t\tfunction $resolve$(){ resolve.apply(def_wrapper,arguments); },\n\t\t\t\t\t\t\tfunction $reject$(){ reject.apply(def_wrapper,arguments); }\n\t\t\t\t\t\t);\n\t\t\t\t\t}\n\t\t\t\t\tcatch (err) {\n\t\t\t\t\t\treject.call(def_wrapper,err);\n\t\t\t\t\t}\n\t\t\t\t})\n\t\t\t}\n\t\t\telse {\n\t\t\t\tself.msg = msg;\n\t\t\t\tself.state = 1;\n\t\t\t\tif (self.chain.length > 0) {\n\t\t\t\t\tschedule(notify,self);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tcatch (err) {\n\t\t\treject.call(new MakeDefWrapper(self),err);\n\t\t}\n\t}\n\n\tfunction reject(msg) {\n\t\tvar self = this;\n\n\t\t// already triggered?\n\t\tif (self.triggered) { return; }\n\n\t\tself.triggered = true;\n\n\t\t// unwrap\n\t\tif (self.def) {\n\t\t\tself = self.def;\n\t\t}\n\n\t\tself.msg = msg;\n\t\tself.state = 2;\n\t\tif (self.chain.length > 0) {\n\t\t\tschedule(notify,self);\n\t\t}\n\t}\n\n\tfunction iteratePromises(Constructor,arr,resolver,rejecter) {\n\t\tfor (var idx=0; idx<arr.length; idx++) {\n\t\t\t(function IIFE(idx){\n\t\t\t\tConstructor.resolve(arr[idx])\n\t\t\t\t.then(\n\t\t\t\t\tfunction $resolver$(msg){\n\t\t\t\t\t\tresolver(idx,msg);\n\t\t\t\t\t},\n\t\t\t\t\trejecter\n\t\t\t\t);\n\t\t\t})(idx);\n\t\t}\n\t}\n\n\tfunction MakeDefWrapper(self) {\n\t\tthis.def = self;\n\t\tthis.triggered = false;\n\t}\n\n\tfunction MakeDef(self) {\n\t\tthis.promise = self;\n\t\tthis.state = 0;\n\t\tthis.triggered = false;\n\t\tthis.chain = [];\n\t\tthis.msg = void 0;\n\t}\n\n\tfunction Promise(executor) {\n\t\tif (typeof executor != \"function\") {\n\t\t\tthrow TypeError(\"Not a function\");\n\t\t}\n\n\t\tif (this.__NPO__ !== 0) {\n\t\t\tthrow TypeError(\"Not a promise\");\n\t\t}\n\n\t\t// instance shadowing the inherited \"brand\"\n\t\t// to signal an already \"initialized\" promise\n\t\tthis.__NPO__ = 1;\n\n\t\tvar def = new MakeDef(this);\n\n\t\tthis[\"then\"] = function then(success,failure) {\n\t\t\tvar o = {\n\t\t\t\tsuccess: typeof success == \"function\" ? success : true,\n\t\t\t\tfailure: typeof failure == \"function\" ? failure : false\n\t\t\t};\n\t\t\t// Note: `then(..)` itself can be borrowed to be used against\n\t\t\t// a different promise constructor for making the chained promise,\n\t\t\t// by substituting a different `this` binding.\n\t\t\to.promise = new this.constructor(function extractChain(resolve,reject) {\n\t\t\t\tif (typeof resolve != \"function\" || typeof reject != \"function\") {\n\t\t\t\t\tthrow TypeError(\"Not a function\");\n\t\t\t\t}\n\n\t\t\t\to.resolve = resolve;\n\t\t\t\to.reject = reject;\n\t\t\t});\n\t\t\tdef.chain.push(o);\n\n\t\t\tif (def.state !== 0) {\n\t\t\t\tschedule(notify,def);\n\t\t\t}\n\n\t\t\treturn o.promise;\n\t\t};\n\t\tthis[\"catch\"] = function $catch$(failure) {\n\t\t\treturn this.then(void 0,failure);\n\t\t};\n\n\t\ttry {\n\t\t\texecutor.call(\n\t\t\t\tvoid 0,\n\t\t\t\tfunction publicResolve(msg){\n\t\t\t\t\tresolve.call(def,msg);\n\t\t\t\t},\n\t\t\t\tfunction publicReject(msg) {\n\t\t\t\t\treject.call(def,msg);\n\t\t\t\t}\n\t\t\t);\n\t\t}\n\t\tcatch (err) {\n\t\t\treject.call(def,err);\n\t\t}\n\t}\n\n\tvar PromisePrototype = builtInProp({},\"constructor\",Promise,\n\t\t/*configurable=*/false\n\t);\n\n\t// Note: Android 4 cannot use `Object.defineProperty(..)` here\n\tPromise.prototype = PromisePrototype;\n\n\t// built-in \"brand\" to signal an \"uninitialized\" promise\n\tbuiltInProp(PromisePrototype,\"__NPO__\",0,\n\t\t/*configurable=*/false\n\t);\n\n\tbuiltInProp(Promise,\"resolve\",function Promise$resolve(msg) {\n\t\tvar Constructor = this;\n\n\t\t// spec mandated checks\n\t\t// note: best \"isPromise\" check that's practical for now\n\t\tif (msg && typeof msg == \"object\" && msg.__NPO__ === 1) {\n\t\t\treturn msg;\n\t\t}\n\n\t\treturn new Constructor(function executor(resolve,reject){\n\t\t\tif (typeof resolve != \"function\" || typeof reject != \"function\") {\n\t\t\t\tthrow TypeError(\"Not a function\");\n\t\t\t}\n\n\t\t\tresolve(msg);\n\t\t});\n\t});\n\n\tbuiltInProp(Promise,\"reject\",function Promise$reject(msg) {\n\t\treturn new this(function executor(resolve,reject){\n\t\t\tif (typeof resolve != \"function\" || typeof reject != \"function\") {\n\t\t\t\tthrow TypeError(\"Not a function\");\n\t\t\t}\n\n\t\t\treject(msg);\n\t\t});\n\t});\n\n\tbuiltInProp(Promise,\"all\",function Promise$all(arr) {\n\t\tvar Constructor = this;\n\n\t\t// spec mandated checks\n\t\tif (ToString.call(arr) != \"[object Array]\") {\n\t\t\treturn Constructor.reject(TypeError(\"Not an array\"));\n\t\t}\n\t\tif (arr.length === 0) {\n\t\t\treturn Constructor.resolve([]);\n\t\t}\n\n\t\treturn new Constructor(function executor(resolve,reject){\n\t\t\tif (typeof resolve != \"function\" || typeof reject != \"function\") {\n\t\t\t\tthrow TypeError(\"Not a function\");\n\t\t\t}\n\n\t\t\tvar len = arr.length, msgs = Array(len), count = 0;\n\n\t\t\titeratePromises(Constructor,arr,function resolver(idx,msg) {\n\t\t\t\tmsgs[idx] = msg;\n\t\t\t\tif (++count === len) {\n\t\t\t\t\tresolve(msgs);\n\t\t\t\t}\n\t\t\t},reject);\n\t\t});\n\t});\n\n\tbuiltInProp(Promise,\"race\",function Promise$race(arr) {\n\t\tvar Constructor = this;\n\n\t\t// spec mandated checks\n\t\tif (ToString.call(arr) != \"[object Array]\") {\n\t\t\treturn Constructor.reject(TypeError(\"Not an array\"));\n\t\t}\n\n\t\treturn new Constructor(function executor(resolve,reject){\n\t\t\tif (typeof resolve != \"function\" || typeof reject != \"function\") {\n\t\t\t\tthrow TypeError(\"Not a function\");\n\t\t\t}\n\n\t\t\titeratePromises(Constructor,arr,function resolver(idx,msg){\n\t\t\t\tresolve(msg);\n\t\t\t},reject);\n\t\t});\n\t});\n\n\treturn Promise;\n});\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// Split a filename into [root, dir, basename, ext], unix version\n// 'root' is just a slash, or nothing.\nvar splitPathRe =\n    /^(\\/?|)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?|)(\\.[^.\\/]*|))(?:[\\/]*)$/;\nvar splitPath = function(filename) {\n  return splitPathRe.exec(filename).slice(1);\n};\n\n// path.resolve([from ...], to)\n// posix version\nexports.resolve = function() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    var path = (i >= 0) ? arguments[i] : process.cwd();\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string') {\n      throw new TypeError('Arguments to path.resolve must be strings');\n    } else if (!path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n};\n\n// path.normalize(path)\n// posix version\nexports.normalize = function(path) {\n  var isAbsolute = exports.isAbsolute(path),\n      trailingSlash = substr(path, -1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(filter(path.split('/'), function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  if (path && trailingSlash) {\n    path += '/';\n  }\n\n  return (isAbsolute ? '/' : '') + path;\n};\n\n// posix version\nexports.isAbsolute = function(path) {\n  return path.charAt(0) === '/';\n};\n\n// posix version\nexports.join = function() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return exports.normalize(filter(paths, function(p, index) {\n    if (typeof p !== 'string') {\n      throw new TypeError('Arguments to path.join must be strings');\n    }\n    return p;\n  }).join('/'));\n};\n\n\n// path.relative(from, to)\n// posix version\nexports.relative = function(from, to) {\n  from = exports.resolve(from).substr(1);\n  to = exports.resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n};\n\nexports.sep = '/';\nexports.delimiter = ':';\n\nexports.dirname = function(path) {\n  var result = splitPath(path),\n      root = result[0],\n      dir = result[1];\n\n  if (!root && !dir) {\n    // No dirname whatsoever\n    return '.';\n  }\n\n  if (dir) {\n    // It has a dirname, strip trailing slash\n    dir = dir.substr(0, dir.length - 1);\n  }\n\n  return root + dir;\n};\n\n\nexports.basename = function(path, ext) {\n  var f = splitPath(path)[2];\n  // TODO: make this comparison case-insensitive on windows?\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  return f;\n};\n\n\nexports.extname = function(path) {\n  return splitPath(path)[3];\n};\n\nfunction filter (xs, f) {\n    if (xs.filter) return xs.filter(f);\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        if (f(xs[i], i, xs)) res.push(xs[i]);\n    }\n    return res;\n}\n\n// String.prototype.substr - negative index don't work in IE8\nvar substr = 'ab'.substr(-1) === 'b'\n    ? function (str, start, len) { return str.substr(start, len) }\n    : function (str, start, len) {\n        if (start < 0) start = str.length + start;\n        return str.substr(start, len);\n    }\n;\n","/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2015 Jeremy Whitlock\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n'use strict';\n\n/**\n * Utility that provides a single API for loading the content of a path/URL.\n *\n * @module PathLoader\n */\n\nvar supportedLoaders = {\n  file: require('./lib/loaders/file'),\n  http: require('./lib/loaders/http'),\n  https: require('./lib/loaders/http')\n};\nvar defaultLoader = typeof window === 'object' || typeof importScripts === 'function' ?\n      supportedLoaders.http :\n      supportedLoaders.file;\n\n// Load promises polyfill if necessary\n/* istanbul ignore if */\nif (typeof Promise === 'undefined') {\n  require('native-promise-only');\n}\n\nfunction getScheme (location) {\n  if (typeof location !== 'undefined') {\n    location = location.indexOf('://') === -1 ? '' : location.split('://')[0];\n  }\n\n  return location;\n}\n\n/**\n * Callback used to provide access to altering a remote request prior to the request being made.\n *\n * @typedef {function} PrepareRequestCallback\n *\n * @param {object} req - The Superagent request object\n * @param {string} location - The location being retrieved\n * @param {function} callback - First callback\n *\n * @alias module:PathLoader~PrepareRequestCallback\n */\n\n /**\n  * Callback used to provide access to processing the raw response of the request being made. *(HTTP loader only)*\n  *\n  * @typedef {function} ProcessResponseCallback\n  *\n  * @param {object} res - The Superagent response object *(For non-HTTP loaders, this object will be like the Superagent\n  * object in that it will have a `text` property whose value is the raw string value being processed.  This was done\n  * for consistency.)*\n  * @param {function} callback - Error-first callback\n  *\n  * @returns {*} the result of processing the responsexs\n  *\n  * @alias module:PathLoader~ProcessResponseCallback\n  */\n\nfunction getLoader (location) {\n  var scheme = getScheme(location);\n  var loader = supportedLoaders[scheme];\n\n  if (typeof loader === 'undefined') {\n    if (scheme === '') {\n      loader = defaultLoader;\n    } else {\n      throw new Error('Unsupported scheme: ' + scheme);\n    }\n  }\n\n  return loader;\n}\n\n/**\n * Loads a document at the provided location and returns a JavaScript object representation.\n *\n * @param {object} location - The location to the document\n * @param {object} [options] - The options\n * @param {string} [options.encoding='utf-8'] - The encoding to use when loading the file *(File loader only)*\n * @param {string} [options.method=get] - The HTTP method to use for the request *(HTTP loader only)*\n * @param {module:PathLoader~PrepareRequestCallback} [options.prepareRequest] - The callback used to prepare the request\n * *(HTTP loader only)*\n * @param {module:PathLoader~ProcessResponseCallback} [options.processContent] - The callback used to process the\n * response\n *\n * @returns {Promise} Always returns a promise even if there is a callback provided\n *\n * @example\n * // Example using Promises\n *\n * PathLoader\n *   .load('./package.json')\n *   .then(JSON.parse)\n *   .then(function (document) {\n *     console.log(document.name + ' (' + document.version + '): ' + document.description);\n *   }, function (err) {\n *     console.error(err.stack);\n *   });\n *\n * @example\n * // Example using options.prepareRequest to provide authentication details for a remotely secure URL\n *\n * PathLoader\n *   .load('https://api.github.com/repos/whitlockjc/path-loader', {\n *     prepareRequest: function (req, callback) {\n *       req.auth('my-username', 'my-password');\n *       callback(undefined, req);\n *     }\n *   })\n *   .then(JSON.parse)\n *   .then(function (document) {\n *     console.log(document.full_name + ': ' + document.description);\n *   }, function (err) {\n *     console.error(err.stack);\n *   });\n *\n * @example\n * // Example loading a YAML file\n *\n * PathLoader\n *   .load('/Users/not-you/projects/path-loader/.travis.yml')\n *   .then(YAML.safeLoad)\n *   .then(function (document) {\n *     console.log('path-loader uses the', document.language, 'language.');\n *   }, function (err) {\n *     console.error(err.stack);\n *   });\n *\n * @example\n * // Example loading a YAML file with options.processContent (Useful if you need information in the raw response)\n *\n * PathLoader\n *   .load('/Users/not-you/projects/path-loader/.travis.yml', {\n *     processContent: function (res, callback) {\n *       callback(YAML.safeLoad(res.text));\n *     }\n *   })\n *   .then(function (document) {\n *     console.log('path-loader uses the', document.language, 'language.');\n *   }, function (err) {\n *     console.error(err.stack);\n *   });\n */\nmodule.exports.load = function (location, options) {\n  var allTasks = Promise.resolve();\n\n  // Default options to empty object\n  if (typeof options === 'undefined') {\n    options = {};\n  }\n\n  // Validate arguments\n  allTasks = allTasks.then(function () {\n    if (typeof location === 'undefined') {\n      throw new TypeError('location is required');\n    } else if (typeof location !== 'string') {\n      throw new TypeError('location must be a string');\n    }\n\n    if (typeof options !== 'undefined') {\n      if (typeof options !== 'object') {\n        throw new TypeError('options must be an object');\n      } else if (typeof options.processContent !== 'undefined' && typeof options.processContent !== 'function') {\n        throw new TypeError('options.processContent must be a function');\n      }\n    }\n  });\n\n  // Load the document from the provided location and process it\n  allTasks = allTasks\n    .then(function () {\n      return new Promise(function (resolve, reject) {\n        var loader = getLoader(location);\n\n        loader.load(location, options || {}, function (err, document) {\n          if (err) {\n            reject(err);\n          } else {\n            resolve(document);\n          }\n        });\n      });\n    })\n    .then(function (res) {\n      if (options.processContent) {\n        return new Promise(function (resolve, reject) {\n          // For consistency between file and http, always send an object with a 'text' property containing the raw\n          // string value being processed.\n          options.processContent(typeof res === 'object' ? res : {text: res}, function (err, processed) {\n            if (err) {\n              reject(err);\n            } else {\n              resolve(processed);\n            }\n          });\n        });\n      } else {\n        // If there was no content processor, we will assume that for all objects that it is a Superagent response\n        // and will return its `text` property value.  Otherwise, we will return the raw response.\n        return typeof res === 'object' ? res.text : res;\n      }\n    });\n\n  return allTasks;\n};\n","/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2015 Jeremy Whitlock\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n'use strict';\n\nvar unsupportedError = new TypeError('The \\'file\\' scheme is not supported in the browser');\n\n/**\n * The file loader is not supported in the browser.\n *\n * @throws {error} the file loader is not supported in the browser\n */\nmodule.exports.getBase = function () {\n  throw unsupportedError;\n};\n\n/**\n * The file loader is not supported in the browser.\n */\nmodule.exports.load = function () {\n  var fn = arguments[arguments.length - 1];\n\n  if (typeof fn === 'function') {\n    fn(unsupportedError);\n  } else {\n    throw unsupportedError;\n  }\n};\n","/* eslint-env node, browser */\n\n/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2015 Jeremy Whitlock\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n'use strict';\n\nvar request = require('superagent');\n\nvar supportedHttpMethods = ['delete', 'get', 'head', 'patch', 'post', 'put'];\n\n/**\n * Loads a file from an http or https URL.\n *\n * @param {string} location - The document URL (If relative, location is relative to window.location.origin).\n * @param {object} options - The loader options\n * @param {string} [options.method=get] - The HTTP method to use for the request\n * @param {module:PathLoader~PrepareRequestCallback} [options.prepareRequest] - The callback used to prepare a request\n * @param {module:PathLoader~ProcessResponseCallback} [options.processContent] - The callback used to process the\n * response\n * @param {function} callback - The error-first callback\n */\nmodule.exports.load = function (location, options, callback) {\n  var realMethod = options.method ? options.method.toLowerCase() : 'get';\n  var err;\n  var realRequest;\n\n  function makeRequest (err, req) {\n    if (err) {\n      callback(err);\n    } else {\n      // buffer() is only available in Node.js\n      if (typeof req.buffer === 'function') {\n        req.buffer(true);\n      }\n\n      req\n        .end(function (err2, res) {\n          if (err2) {\n            callback(err2);\n          } else {\n            callback(undefined, res);\n          }\n        });\n    }\n  }\n\n  if (typeof options.method !== 'undefined') {\n    if (typeof options.method !== 'string') {\n      err = new TypeError('options.method must be a string');\n    } else if (supportedHttpMethods.indexOf(options.method) === -1) {\n      err = new TypeError('options.method must be one of the following: ' +\n        supportedHttpMethods.slice(0, supportedHttpMethods.length - 1).join(', ') + ' or ' +\n        supportedHttpMethods[supportedHttpMethods.length - 1]);\n    }\n  } else if (typeof options.prepareRequest !== 'undefined' && typeof options.prepareRequest !== 'function') {\n    err = new TypeError('options.prepareRequest must be a function');\n  }\n\n  if (!err) {\n    realRequest = request[realMethod === 'delete' ? 'del' : realMethod](location);\n\n    if (options.prepareRequest) {\n      try {\n        options.prepareRequest(realRequest, makeRequest);\n      } catch (err2) {\n        callback(err2);\n      }\n    } else {\n      makeRequest(undefined, realRequest);\n    }\n  } else {\n    callback(err);\n  }\n};\n","// shim for using process in browser\nvar process = module.exports = {};\n\n// cached from whatever global is present so that test runners that stub it\n// don't break things.  But we need to wrap it in a try catch in case it is\n// wrapped in strict mode code which doesn't define any globals.  It's inside a\n// function because try/catches deoptimize in certain engines.\n\nvar cachedSetTimeout;\nvar cachedClearTimeout;\n\nfunction defaultSetTimout() {\n    throw new Error('setTimeout has not been defined');\n}\nfunction defaultClearTimeout () {\n    throw new Error('clearTimeout has not been defined');\n}\n(function () {\n    try {\n        if (typeof setTimeout === 'function') {\n            cachedSetTimeout = setTimeout;\n        } else {\n            cachedSetTimeout = defaultSetTimout;\n        }\n    } catch (e) {\n        cachedSetTimeout = defaultSetTimout;\n    }\n    try {\n        if (typeof clearTimeout === 'function') {\n            cachedClearTimeout = clearTimeout;\n        } else {\n            cachedClearTimeout = defaultClearTimeout;\n        }\n    } catch (e) {\n        cachedClearTimeout = defaultClearTimeout;\n    }\n} ())\nfunction runTimeout(fun) {\n    if (cachedSetTimeout === setTimeout) {\n        //normal enviroments in sane situations\n        return setTimeout(fun, 0);\n    }\n    // if setTimeout wasn't available but was latter defined\n    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {\n        cachedSetTimeout = setTimeout;\n        return setTimeout(fun, 0);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedSetTimeout(fun, 0);\n    } catch(e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally\n            return cachedSetTimeout.call(null, fun, 0);\n        } catch(e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error\n            return cachedSetTimeout.call(this, fun, 0);\n        }\n    }\n\n\n}\nfunction runClearTimeout(marker) {\n    if (cachedClearTimeout === clearTimeout) {\n        //normal enviroments in sane situations\n        return clearTimeout(marker);\n    }\n    // if clearTimeout wasn't available but was latter defined\n    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {\n        cachedClearTimeout = clearTimeout;\n        return clearTimeout(marker);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedClearTimeout(marker);\n    } catch (e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally\n            return cachedClearTimeout.call(null, marker);\n        } catch (e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.\n            // Some versions of I.E. have different rules for clearTimeout vs setTimeout\n            return cachedClearTimeout.call(this, marker);\n        }\n    }\n\n\n\n}\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    if (!draining || !currentQueue) {\n        return;\n    }\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = runTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    runClearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        runTimeout(drainQueue);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\nprocess.prependListener = noop;\nprocess.prependOnceListener = noop;\n\nprocess.listeners = function (name) { return [] }\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\n// If obj.hasOwnProperty has been overridden, then calling\n// obj.hasOwnProperty(prop) will break.\n// See: https://github.com/joyent/node/issues/1707\nfunction hasOwnProperty(obj, prop) {\n  return Object.prototype.hasOwnProperty.call(obj, prop);\n}\n\nmodule.exports = function(qs, sep, eq, options) {\n  sep = sep || '&';\n  eq = eq || '=';\n  var obj = {};\n\n  if (typeof qs !== 'string' || qs.length === 0) {\n    return obj;\n  }\n\n  var regexp = /\\+/g;\n  qs = qs.split(sep);\n\n  var maxKeys = 1000;\n  if (options && typeof options.maxKeys === 'number') {\n    maxKeys = options.maxKeys;\n  }\n\n  var len = qs.length;\n  // maxKeys <= 0 means that we should not limit keys count\n  if (maxKeys > 0 && len > maxKeys) {\n    len = maxKeys;\n  }\n\n  for (var i = 0; i < len; ++i) {\n    var x = qs[i].replace(regexp, '%20'),\n        idx = x.indexOf(eq),\n        kstr, vstr, k, v;\n\n    if (idx >= 0) {\n      kstr = x.substr(0, idx);\n      vstr = x.substr(idx + 1);\n    } else {\n      kstr = x;\n      vstr = '';\n    }\n\n    k = decodeURIComponent(kstr);\n    v = decodeURIComponent(vstr);\n\n    if (!hasOwnProperty(obj, k)) {\n      obj[k] = v;\n    } else if (isArray(obj[k])) {\n      obj[k].push(v);\n    } else {\n      obj[k] = [obj[k], v];\n    }\n  }\n\n  return obj;\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar stringifyPrimitive = function(v) {\n  switch (typeof v) {\n    case 'string':\n      return v;\n\n    case 'boolean':\n      return v ? 'true' : 'false';\n\n    case 'number':\n      return isFinite(v) ? v : '';\n\n    default:\n      return '';\n  }\n};\n\nmodule.exports = function(obj, sep, eq, name) {\n  sep = sep || '&';\n  eq = eq || '=';\n  if (obj === null) {\n    obj = undefined;\n  }\n\n  if (typeof obj === 'object') {\n    return map(objectKeys(obj), function(k) {\n      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;\n      if (isArray(obj[k])) {\n        return map(obj[k], function(v) {\n          return ks + encodeURIComponent(stringifyPrimitive(v));\n        }).join(sep);\n      } else {\n        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));\n      }\n    }).join(sep);\n\n  }\n\n  if (!name) return '';\n  return encodeURIComponent(stringifyPrimitive(name)) + eq +\n         encodeURIComponent(stringifyPrimitive(obj));\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n\nfunction map (xs, f) {\n  if (xs.map) return xs.map(f);\n  var res = [];\n  for (var i = 0; i < xs.length; i++) {\n    res.push(f(xs[i], i));\n  }\n  return res;\n}\n\nvar objectKeys = Object.keys || function (obj) {\n  var res = [];\n  for (var key in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);\n  }\n  return res;\n};\n","'use strict';\n\nexports.decode = exports.parse = require('./decode');\nexports.encode = exports.stringify = require('./encode');\n","'use strict';\nmodule.exports = function (str) {\n\tvar isExtendedLengthPath = /^\\\\\\\\\\?\\\\/.test(str);\n\tvar hasNonAscii = /[^\\x00-\\x80]+/.test(str);\n\n\tif (isExtendedLengthPath || hasNonAscii) {\n\t\treturn str;\n\t}\n\n\treturn str.replace(/\\\\/g, '/');\n};\n","(function (factory) {\n    if (typeof exports === 'object') {\n        // Node/CommonJS\n        module.exports = factory();\n    } else if (typeof define === 'function' && define.amd) {\n        // AMD\n        define(factory);\n    } else {\n        // Browser globals (with support for web workers)\n        var glob;\n\n        try {\n            glob = window;\n        } catch (e) {\n            glob = self;\n        }\n\n        glob.SparkMD5 = factory();\n    }\n}(function (undefined) {\n\n    'use strict';\n\n    /*\n     * Fastest md5 implementation around (JKM md5).\n     * Credits: Joseph Myers\n     *\n     * @see http://www.myersdaily.org/joseph/javascript/md5-text.html\n     * @see http://jsperf.com/md5-shootout/7\n     */\n\n    /* this function is much faster,\n      so if possible we use it. Some IEs\n      are the only ones I know of that\n      need the idiotic second function,\n      generated by an if clause.  */\n    var add32 = function (a, b) {\n        return (a + b) & 0xFFFFFFFF;\n    },\n        hex_chr = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];\n\n\n    function cmn(q, a, b, x, s, t) {\n        a = add32(add32(a, q), add32(x, t));\n        return add32((a << s) | (a >>> (32 - s)), b);\n    }\n\n    function md5cycle(x, k) {\n        var a = x[0],\n            b = x[1],\n            c = x[2],\n            d = x[3];\n\n        a += (b & c | ~b & d) + k[0] - 680876936 | 0;\n        a  = (a << 7 | a >>> 25) + b | 0;\n        d += (a & b | ~a & c) + k[1] - 389564586 | 0;\n        d  = (d << 12 | d >>> 20) + a | 0;\n        c += (d & a | ~d & b) + k[2] + 606105819 | 0;\n        c  = (c << 17 | c >>> 15) + d | 0;\n        b += (c & d | ~c & a) + k[3] - 1044525330 | 0;\n        b  = (b << 22 | b >>> 10) + c | 0;\n        a += (b & c | ~b & d) + k[4] - 176418897 | 0;\n        a  = (a << 7 | a >>> 25) + b | 0;\n        d += (a & b | ~a & c) + k[5] + 1200080426 | 0;\n        d  = (d << 12 | d >>> 20) + a | 0;\n        c += (d & a | ~d & b) + k[6] - 1473231341 | 0;\n        c  = (c << 17 | c >>> 15) + d | 0;\n        b += (c & d | ~c & a) + k[7] - 45705983 | 0;\n        b  = (b << 22 | b >>> 10) + c | 0;\n        a += (b & c | ~b & d) + k[8] + 1770035416 | 0;\n        a  = (a << 7 | a >>> 25) + b | 0;\n        d += (a & b | ~a & c) + k[9] - 1958414417 | 0;\n        d  = (d << 12 | d >>> 20) + a | 0;\n        c += (d & a | ~d & b) + k[10] - 42063 | 0;\n        c  = (c << 17 | c >>> 15) + d | 0;\n        b += (c & d | ~c & a) + k[11] - 1990404162 | 0;\n        b  = (b << 22 | b >>> 10) + c | 0;\n        a += (b & c | ~b & d) + k[12] + 1804603682 | 0;\n        a  = (a << 7 | a >>> 25) + b | 0;\n        d += (a & b | ~a & c) + k[13] - 40341101 | 0;\n        d  = (d << 12 | d >>> 20) + a | 0;\n        c += (d & a | ~d & b) + k[14] - 1502002290 | 0;\n        c  = (c << 17 | c >>> 15) + d | 0;\n        b += (c & d | ~c & a) + k[15] + 1236535329 | 0;\n        b  = (b << 22 | b >>> 10) + c | 0;\n\n        a += (b & d | c & ~d) + k[1] - 165796510 | 0;\n        a  = (a << 5 | a >>> 27) + b | 0;\n        d += (a & c | b & ~c) + k[6] - 1069501632 | 0;\n        d  = (d << 9 | d >>> 23) + a | 0;\n        c += (d & b | a & ~b) + k[11] + 643717713 | 0;\n        c  = (c << 14 | c >>> 18) + d | 0;\n        b += (c & a | d & ~a) + k[0] - 373897302 | 0;\n        b  = (b << 20 | b >>> 12) + c | 0;\n        a += (b & d | c & ~d) + k[5] - 701558691 | 0;\n        a  = (a << 5 | a >>> 27) + b | 0;\n        d += (a & c | b & ~c) + k[10] + 38016083 | 0;\n        d  = (d << 9 | d >>> 23) + a | 0;\n        c += (d & b | a & ~b) + k[15] - 660478335 | 0;\n        c  = (c << 14 | c >>> 18) + d | 0;\n        b += (c & a | d & ~a) + k[4] - 405537848 | 0;\n        b  = (b << 20 | b >>> 12) + c | 0;\n        a += (b & d | c & ~d) + k[9] + 568446438 | 0;\n        a  = (a << 5 | a >>> 27) + b | 0;\n        d += (a & c | b & ~c) + k[14] - 1019803690 | 0;\n        d  = (d << 9 | d >>> 23) + a | 0;\n        c += (d & b | a & ~b) + k[3] - 187363961 | 0;\n        c  = (c << 14 | c >>> 18) + d | 0;\n        b += (c & a | d & ~a) + k[8] + 1163531501 | 0;\n        b  = (b << 20 | b >>> 12) + c | 0;\n        a += (b & d | c & ~d) + k[13] - 1444681467 | 0;\n        a  = (a << 5 | a >>> 27) + b | 0;\n        d += (a & c | b & ~c) + k[2] - 51403784 | 0;\n        d  = (d << 9 | d >>> 23) + a | 0;\n        c += (d & b | a & ~b) + k[7] + 1735328473 | 0;\n        c  = (c << 14 | c >>> 18) + d | 0;\n        b += (c & a | d & ~a) + k[12] - 1926607734 | 0;\n        b  = (b << 20 | b >>> 12) + c | 0;\n\n        a += (b ^ c ^ d) + k[5] - 378558 | 0;\n        a  = (a << 4 | a >>> 28) + b | 0;\n        d += (a ^ b ^ c) + k[8] - 2022574463 | 0;\n        d  = (d << 11 | d >>> 21) + a | 0;\n        c += (d ^ a ^ b) + k[11] + 1839030562 | 0;\n        c  = (c << 16 | c >>> 16) + d | 0;\n        b += (c ^ d ^ a) + k[14] - 35309556 | 0;\n        b  = (b << 23 | b >>> 9) + c | 0;\n        a += (b ^ c ^ d) + k[1] - 1530992060 | 0;\n        a  = (a << 4 | a >>> 28) + b | 0;\n        d += (a ^ b ^ c) + k[4] + 1272893353 | 0;\n        d  = (d << 11 | d >>> 21) + a | 0;\n        c += (d ^ a ^ b) + k[7] - 155497632 | 0;\n        c  = (c << 16 | c >>> 16) + d | 0;\n        b += (c ^ d ^ a) + k[10] - 1094730640 | 0;\n        b  = (b << 23 | b >>> 9) + c | 0;\n        a += (b ^ c ^ d) + k[13] + 681279174 | 0;\n        a  = (a << 4 | a >>> 28) + b | 0;\n        d += (a ^ b ^ c) + k[0] - 358537222 | 0;\n        d  = (d << 11 | d >>> 21) + a | 0;\n        c += (d ^ a ^ b) + k[3] - 722521979 | 0;\n        c  = (c << 16 | c >>> 16) + d | 0;\n        b += (c ^ d ^ a) + k[6] + 76029189 | 0;\n        b  = (b << 23 | b >>> 9) + c | 0;\n        a += (b ^ c ^ d) + k[9] - 640364487 | 0;\n        a  = (a << 4 | a >>> 28) + b | 0;\n        d += (a ^ b ^ c) + k[12] - 421815835 | 0;\n        d  = (d << 11 | d >>> 21) + a | 0;\n        c += (d ^ a ^ b) + k[15] + 530742520 | 0;\n        c  = (c << 16 | c >>> 16) + d | 0;\n        b += (c ^ d ^ a) + k[2] - 995338651 | 0;\n        b  = (b << 23 | b >>> 9) + c | 0;\n\n        a += (c ^ (b | ~d)) + k[0] - 198630844 | 0;\n        a  = (a << 6 | a >>> 26) + b | 0;\n        d += (b ^ (a | ~c)) + k[7] + 1126891415 | 0;\n        d  = (d << 10 | d >>> 22) + a | 0;\n        c += (a ^ (d | ~b)) + k[14] - 1416354905 | 0;\n        c  = (c << 15 | c >>> 17) + d | 0;\n        b += (d ^ (c | ~a)) + k[5] - 57434055 | 0;\n        b  = (b << 21 |b >>> 11) + c | 0;\n        a += (c ^ (b | ~d)) + k[12] + 1700485571 | 0;\n        a  = (a << 6 | a >>> 26) + b | 0;\n        d += (b ^ (a | ~c)) + k[3] - 1894986606 | 0;\n        d  = (d << 10 | d >>> 22) + a | 0;\n        c += (a ^ (d | ~b)) + k[10] - 1051523 | 0;\n        c  = (c << 15 | c >>> 17) + d | 0;\n        b += (d ^ (c | ~a)) + k[1] - 2054922799 | 0;\n        b  = (b << 21 |b >>> 11) + c | 0;\n        a += (c ^ (b | ~d)) + k[8] + 1873313359 | 0;\n        a  = (a << 6 | a >>> 26) + b | 0;\n        d += (b ^ (a | ~c)) + k[15] - 30611744 | 0;\n        d  = (d << 10 | d >>> 22) + a | 0;\n        c += (a ^ (d | ~b)) + k[6] - 1560198380 | 0;\n        c  = (c << 15 | c >>> 17) + d | 0;\n        b += (d ^ (c | ~a)) + k[13] + 1309151649 | 0;\n        b  = (b << 21 |b >>> 11) + c | 0;\n        a += (c ^ (b | ~d)) + k[4] - 145523070 | 0;\n        a  = (a << 6 | a >>> 26) + b | 0;\n        d += (b ^ (a | ~c)) + k[11] - 1120210379 | 0;\n        d  = (d << 10 | d >>> 22) + a | 0;\n        c += (a ^ (d | ~b)) + k[2] + 718787259 | 0;\n        c  = (c << 15 | c >>> 17) + d | 0;\n        b += (d ^ (c | ~a)) + k[9] - 343485551 | 0;\n        b  = (b << 21 | b >>> 11) + c | 0;\n\n        x[0] = a + x[0] | 0;\n        x[1] = b + x[1] | 0;\n        x[2] = c + x[2] | 0;\n        x[3] = d + x[3] | 0;\n    }\n\n    function md5blk(s) {\n        var md5blks = [],\n            i; /* Andy King said do it this way. */\n\n        for (i = 0; i < 64; i += 4) {\n            md5blks[i >> 2] = s.charCodeAt(i) + (s.charCodeAt(i + 1) << 8) + (s.charCodeAt(i + 2) << 16) + (s.charCodeAt(i + 3) << 24);\n        }\n        return md5blks;\n    }\n\n    function md5blk_array(a) {\n        var md5blks = [],\n            i; /* Andy King said do it this way. */\n\n        for (i = 0; i < 64; i += 4) {\n            md5blks[i >> 2] = a[i] + (a[i + 1] << 8) + (a[i + 2] << 16) + (a[i + 3] << 24);\n        }\n        return md5blks;\n    }\n\n    function md51(s) {\n        var n = s.length,\n            state = [1732584193, -271733879, -1732584194, 271733878],\n            i,\n            length,\n            tail,\n            tmp,\n            lo,\n            hi;\n\n        for (i = 64; i <= n; i += 64) {\n            md5cycle(state, md5blk(s.substring(i - 64, i)));\n        }\n        s = s.substring(i - 64);\n        length = s.length;\n        tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];\n        for (i = 0; i < length; i += 1) {\n            tail[i >> 2] |= s.charCodeAt(i) << ((i % 4) << 3);\n        }\n        tail[i >> 2] |= 0x80 << ((i % 4) << 3);\n        if (i > 55) {\n            md5cycle(state, tail);\n            for (i = 0; i < 16; i += 1) {\n                tail[i] = 0;\n            }\n        }\n\n        // Beware that the final length might not fit in 32 bits so we take care of that\n        tmp = n * 8;\n        tmp = tmp.toString(16).match(/(.*?)(.{0,8})$/);\n        lo = parseInt(tmp[2], 16);\n        hi = parseInt(tmp[1], 16) || 0;\n\n        tail[14] = lo;\n        tail[15] = hi;\n\n        md5cycle(state, tail);\n        return state;\n    }\n\n    function md51_array(a) {\n        var n = a.length,\n            state = [1732584193, -271733879, -1732584194, 271733878],\n            i,\n            length,\n            tail,\n            tmp,\n            lo,\n            hi;\n\n        for (i = 64; i <= n; i += 64) {\n            md5cycle(state, md5blk_array(a.subarray(i - 64, i)));\n        }\n\n        // Not sure if it is a bug, however IE10 will always produce a sub array of length 1\n        // containing the last element of the parent array if the sub array specified starts\n        // beyond the length of the parent array - weird.\n        // https://connect.microsoft.com/IE/feedback/details/771452/typed-array-subarray-issue\n        a = (i - 64) < n ? a.subarray(i - 64) : new Uint8Array(0);\n\n        length = a.length;\n        tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];\n        for (i = 0; i < length; i += 1) {\n            tail[i >> 2] |= a[i] << ((i % 4) << 3);\n        }\n\n        tail[i >> 2] |= 0x80 << ((i % 4) << 3);\n        if (i > 55) {\n            md5cycle(state, tail);\n            for (i = 0; i < 16; i += 1) {\n                tail[i] = 0;\n            }\n        }\n\n        // Beware that the final length might not fit in 32 bits so we take care of that\n        tmp = n * 8;\n        tmp = tmp.toString(16).match(/(.*?)(.{0,8})$/);\n        lo = parseInt(tmp[2], 16);\n        hi = parseInt(tmp[1], 16) || 0;\n\n        tail[14] = lo;\n        tail[15] = hi;\n\n        md5cycle(state, tail);\n\n        return state;\n    }\n\n    function rhex(n) {\n        var s = '',\n            j;\n        for (j = 0; j < 4; j += 1) {\n            s += hex_chr[(n >> (j * 8 + 4)) & 0x0F] + hex_chr[(n >> (j * 8)) & 0x0F];\n        }\n        return s;\n    }\n\n    function hex(x) {\n        var i;\n        for (i = 0; i < x.length; i += 1) {\n            x[i] = rhex(x[i]);\n        }\n        return x.join('');\n    }\n\n    // In some cases the fast add32 function cannot be used..\n    if (hex(md51('hello')) !== '5d41402abc4b2a76b9719d911017c592') {\n        add32 = function (x, y) {\n            var lsw = (x & 0xFFFF) + (y & 0xFFFF),\n                msw = (x >> 16) + (y >> 16) + (lsw >> 16);\n            return (msw << 16) | (lsw & 0xFFFF);\n        };\n    }\n\n    // ---------------------------------------------------\n\n    /**\n     * ArrayBuffer slice polyfill.\n     *\n     * @see https://github.com/ttaubert/node-arraybuffer-slice\n     */\n\n    if (typeof ArrayBuffer !== 'undefined' && !ArrayBuffer.prototype.slice) {\n        (function () {\n            function clamp(val, length) {\n                val = (val | 0) || 0;\n\n                if (val < 0) {\n                    return Math.max(val + length, 0);\n                }\n\n                return Math.min(val, length);\n            }\n\n            ArrayBuffer.prototype.slice = function (from, to) {\n                var length = this.byteLength,\n                    begin = clamp(from, length),\n                    end = length,\n                    num,\n                    target,\n                    targetArray,\n                    sourceArray;\n\n                if (to !== undefined) {\n                    end = clamp(to, length);\n                }\n\n                if (begin > end) {\n                    return new ArrayBuffer(0);\n                }\n\n                num = end - begin;\n                target = new ArrayBuffer(num);\n                targetArray = new Uint8Array(target);\n\n                sourceArray = new Uint8Array(this, begin, num);\n                targetArray.set(sourceArray);\n\n                return target;\n            };\n        })();\n    }\n\n    // ---------------------------------------------------\n\n    /**\n     * Helpers.\n     */\n\n    function toUtf8(str) {\n        if (/[\\u0080-\\uFFFF]/.test(str)) {\n            str = unescape(encodeURIComponent(str));\n        }\n\n        return str;\n    }\n\n    function utf8Str2ArrayBuffer(str, returnUInt8Array) {\n        var length = str.length,\n           buff = new ArrayBuffer(length),\n           arr = new Uint8Array(buff),\n           i;\n\n        for (i = 0; i < length; i += 1) {\n            arr[i] = str.charCodeAt(i);\n        }\n\n        return returnUInt8Array ? arr : buff;\n    }\n\n    function arrayBuffer2Utf8Str(buff) {\n        return String.fromCharCode.apply(null, new Uint8Array(buff));\n    }\n\n    function concatenateArrayBuffers(first, second, returnUInt8Array) {\n        var result = new Uint8Array(first.byteLength + second.byteLength);\n\n        result.set(new Uint8Array(first));\n        result.set(new Uint8Array(second), first.byteLength);\n\n        return returnUInt8Array ? result : result.buffer;\n    }\n\n    function hexToBinaryString(hex) {\n        var bytes = [],\n            length = hex.length,\n            x;\n\n        for (x = 0; x < length - 1; x += 2) {\n            bytes.push(parseInt(hex.substr(x, 2), 16));\n        }\n\n        return String.fromCharCode.apply(String, bytes);\n    }\n\n    // ---------------------------------------------------\n\n    /**\n     * SparkMD5 OOP implementation.\n     *\n     * Use this class to perform an incremental md5, otherwise use the\n     * static methods instead.\n     */\n\n    function SparkMD5() {\n        // call reset to init the instance\n        this.reset();\n    }\n\n    /**\n     * Appends a string.\n     * A conversion will be applied if an utf8 string is detected.\n     *\n     * @param {String} str The string to be appended\n     *\n     * @return {SparkMD5} The instance itself\n     */\n    SparkMD5.prototype.append = function (str) {\n        // Converts the string to utf8 bytes if necessary\n        // Then append as binary\n        this.appendBinary(toUtf8(str));\n\n        return this;\n    };\n\n    /**\n     * Appends a binary string.\n     *\n     * @param {String} contents The binary string to be appended\n     *\n     * @return {SparkMD5} The instance itself\n     */\n    SparkMD5.prototype.appendBinary = function (contents) {\n        this._buff += contents;\n        this._length += contents.length;\n\n        var length = this._buff.length,\n            i;\n\n        for (i = 64; i <= length; i += 64) {\n            md5cycle(this._hash, md5blk(this._buff.substring(i - 64, i)));\n        }\n\n        this._buff = this._buff.substring(i - 64);\n\n        return this;\n    };\n\n    /**\n     * Finishes the incremental computation, reseting the internal state and\n     * returning the result.\n     *\n     * @param {Boolean} raw True to get the raw string, false to get the hex string\n     *\n     * @return {String} The result\n     */\n    SparkMD5.prototype.end = function (raw) {\n        var buff = this._buff,\n            length = buff.length,\n            i,\n            tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n            ret;\n\n        for (i = 0; i < length; i += 1) {\n            tail[i >> 2] |= buff.charCodeAt(i) << ((i % 4) << 3);\n        }\n\n        this._finish(tail, length);\n        ret = hex(this._hash);\n\n        if (raw) {\n            ret = hexToBinaryString(ret);\n        }\n\n        this.reset();\n\n        return ret;\n    };\n\n    /**\n     * Resets the internal state of the computation.\n     *\n     * @return {SparkMD5} The instance itself\n     */\n    SparkMD5.prototype.reset = function () {\n        this._buff = '';\n        this._length = 0;\n        this._hash = [1732584193, -271733879, -1732584194, 271733878];\n\n        return this;\n    };\n\n    /**\n     * Gets the internal state of the computation.\n     *\n     * @return {Object} The state\n     */\n    SparkMD5.prototype.getState = function () {\n        return {\n            buff: this._buff,\n            length: this._length,\n            hash: this._hash\n        };\n    };\n\n    /**\n     * Gets the internal state of the computation.\n     *\n     * @param {Object} state The state\n     *\n     * @return {SparkMD5} The instance itself\n     */\n    SparkMD5.prototype.setState = function (state) {\n        this._buff = state.buff;\n        this._length = state.length;\n        this._hash = state.hash;\n\n        return this;\n    };\n\n    /**\n     * Releases memory used by the incremental buffer and other additional\n     * resources. If you plan to use the instance again, use reset instead.\n     */\n    SparkMD5.prototype.destroy = function () {\n        delete this._hash;\n        delete this._buff;\n        delete this._length;\n    };\n\n    /**\n     * Finish the final calculation based on the tail.\n     *\n     * @param {Array}  tail   The tail (will be modified)\n     * @param {Number} length The length of the remaining buffer\n     */\n    SparkMD5.prototype._finish = function (tail, length) {\n        var i = length,\n            tmp,\n            lo,\n            hi;\n\n        tail[i >> 2] |= 0x80 << ((i % 4) << 3);\n        if (i > 55) {\n            md5cycle(this._hash, tail);\n            for (i = 0; i < 16; i += 1) {\n                tail[i] = 0;\n            }\n        }\n\n        // Do the final computation based on the tail and length\n        // Beware that the final length may not fit in 32 bits so we take care of that\n        tmp = this._length * 8;\n        tmp = tmp.toString(16).match(/(.*?)(.{0,8})$/);\n        lo = parseInt(tmp[2], 16);\n        hi = parseInt(tmp[1], 16) || 0;\n\n        tail[14] = lo;\n        tail[15] = hi;\n        md5cycle(this._hash, tail);\n    };\n\n    /**\n     * Performs the md5 hash on a string.\n     * A conversion will be applied if utf8 string is detected.\n     *\n     * @param {String}  str The string\n     * @param {Boolean} raw True to get the raw string, false to get the hex string\n     *\n     * @return {String} The result\n     */\n    SparkMD5.hash = function (str, raw) {\n        // Converts the string to utf8 bytes if necessary\n        // Then compute it using the binary function\n        return SparkMD5.hashBinary(toUtf8(str), raw);\n    };\n\n    /**\n     * Performs the md5 hash on a binary string.\n     *\n     * @param {String}  content The binary string\n     * @param {Boolean} raw     True to get the raw string, false to get the hex string\n     *\n     * @return {String} The result\n     */\n    SparkMD5.hashBinary = function (content, raw) {\n        var hash = md51(content),\n            ret = hex(hash);\n\n        return raw ? hexToBinaryString(ret) : ret;\n    };\n\n    // ---------------------------------------------------\n\n    /**\n     * SparkMD5 OOP implementation for array buffers.\n     *\n     * Use this class to perform an incremental md5 ONLY for array buffers.\n     */\n    SparkMD5.ArrayBuffer = function () {\n        // call reset to init the instance\n        this.reset();\n    };\n\n    /**\n     * Appends an array buffer.\n     *\n     * @param {ArrayBuffer} arr The array to be appended\n     *\n     * @return {SparkMD5.ArrayBuffer} The instance itself\n     */\n    SparkMD5.ArrayBuffer.prototype.append = function (arr) {\n        var buff = concatenateArrayBuffers(this._buff.buffer, arr, true),\n            length = buff.length,\n            i;\n\n        this._length += arr.byteLength;\n\n        for (i = 64; i <= length; i += 64) {\n            md5cycle(this._hash, md5blk_array(buff.subarray(i - 64, i)));\n        }\n\n        this._buff = (i - 64) < length ? new Uint8Array(buff.buffer.slice(i - 64)) : new Uint8Array(0);\n\n        return this;\n    };\n\n    /**\n     * Finishes the incremental computation, reseting the internal state and\n     * returning the result.\n     *\n     * @param {Boolean} raw True to get the raw string, false to get the hex string\n     *\n     * @return {String} The result\n     */\n    SparkMD5.ArrayBuffer.prototype.end = function (raw) {\n        var buff = this._buff,\n            length = buff.length,\n            tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n            i,\n            ret;\n\n        for (i = 0; i < length; i += 1) {\n            tail[i >> 2] |= buff[i] << ((i % 4) << 3);\n        }\n\n        this._finish(tail, length);\n        ret = hex(this._hash);\n\n        if (raw) {\n            ret = hexToBinaryString(ret);\n        }\n\n        this.reset();\n\n        return ret;\n    };\n\n    /**\n     * Resets the internal state of the computation.\n     *\n     * @return {SparkMD5.ArrayBuffer} The instance itself\n     */\n    SparkMD5.ArrayBuffer.prototype.reset = function () {\n        this._buff = new Uint8Array(0);\n        this._length = 0;\n        this._hash = [1732584193, -271733879, -1732584194, 271733878];\n\n        return this;\n    };\n\n    /**\n     * Gets the internal state of the computation.\n     *\n     * @return {Object} The state\n     */\n    SparkMD5.ArrayBuffer.prototype.getState = function () {\n        var state = SparkMD5.prototype.getState.call(this);\n\n        // Convert buffer to a string\n        state.buff = arrayBuffer2Utf8Str(state.buff);\n\n        return state;\n    };\n\n    /**\n     * Gets the internal state of the computation.\n     *\n     * @param {Object} state The state\n     *\n     * @return {SparkMD5.ArrayBuffer} The instance itself\n     */\n    SparkMD5.ArrayBuffer.prototype.setState = function (state) {\n        // Convert string to buffer\n        state.buff = utf8Str2ArrayBuffer(state.buff, true);\n\n        return SparkMD5.prototype.setState.call(this, state);\n    };\n\n    SparkMD5.ArrayBuffer.prototype.destroy = SparkMD5.prototype.destroy;\n\n    SparkMD5.ArrayBuffer.prototype._finish = SparkMD5.prototype._finish;\n\n    /**\n     * Performs the md5 hash on an array buffer.\n     *\n     * @param {ArrayBuffer} arr The array buffer\n     * @param {Boolean}     raw True to get the raw string, false to get the hex one\n     *\n     * @return {String} The result\n     */\n    SparkMD5.ArrayBuffer.hash = function (arr, raw) {\n        var hash = md51_array(new Uint8Array(arr)),\n            ret = hex(hash);\n\n        return raw ? hexToBinaryString(ret) : ret;\n    };\n\n    return SparkMD5;\n}));\n","function Agent() {\n  this._defaults = [];\n}\n\n[\"use\", \"on\", \"once\", \"set\", \"query\", \"type\", \"accept\", \"auth\", \"withCredentials\", \"sortQuery\", \"retry\", \"ok\", \"redirects\",\n \"timeout\", \"buffer\", \"serialize\", \"parse\", \"ca\", \"key\", \"pfx\", \"cert\"].forEach(function(fn) {\n  /** Default setting for all requests from this agent */\n  Agent.prototype[fn] = function(/*varargs*/) {\n    this._defaults.push({fn:fn, arguments:arguments});\n    return this;\n  }\n});\n\nAgent.prototype._setDefaults = function(req) {\n    this._defaults.forEach(function(def) {\n      req[def.fn].apply(req, def.arguments);\n    });\n};\n\nmodule.exports = Agent;\n","/**\n * Root reference for iframes.\n */\n\nvar root;\nif (typeof window !== 'undefined') { // Browser window\n  root = window;\n} else if (typeof self !== 'undefined') { // Web Worker\n  root = self;\n} else { // Other environments\n  console.warn(\"Using browser-only version of superagent in non-browser environment\");\n  root = this;\n}\n\nvar Emitter = require('component-emitter');\nvar RequestBase = require('./request-base');\nvar isObject = require('./is-object');\nvar ResponseBase = require('./response-base');\nvar Agent = require('./agent-base');\n\n/**\n * Noop.\n */\n\nfunction noop(){};\n\n/**\n * Expose `request`.\n */\n\nvar request = exports = module.exports = function(method, url) {\n  // callback\n  if ('function' == typeof url) {\n    return new exports.Request('GET', method).end(url);\n  }\n\n  // url first\n  if (1 == arguments.length) {\n    return new exports.Request('GET', method);\n  }\n\n  return new exports.Request(method, url);\n}\n\nexports.Request = Request;\n\n/**\n * Determine XHR.\n */\n\nrequest.getXHR = function () {\n  if (root.XMLHttpRequest\n      && (!root.location || 'file:' != root.location.protocol\n          || !root.ActiveXObject)) {\n    return new XMLHttpRequest;\n  } else {\n    try { return new ActiveXObject('Microsoft.XMLHTTP'); } catch(e) {}\n    try { return new ActiveXObject('Msxml2.XMLHTTP.6.0'); } catch(e) {}\n    try { return new ActiveXObject('Msxml2.XMLHTTP.3.0'); } catch(e) {}\n    try { return new ActiveXObject('Msxml2.XMLHTTP'); } catch(e) {}\n  }\n  throw Error(\"Browser-only version of superagent could not find XHR\");\n};\n\n/**\n * Removes leading and trailing whitespace, added to support IE.\n *\n * @param {String} s\n * @return {String}\n * @api private\n */\n\nvar trim = ''.trim\n  ? function(s) { return s.trim(); }\n  : function(s) { return s.replace(/(^\\s*|\\s*$)/g, ''); };\n\n/**\n * Serialize the given `obj`.\n *\n * @param {Object} obj\n * @return {String}\n * @api private\n */\n\nfunction serialize(obj) {\n  if (!isObject(obj)) return obj;\n  var pairs = [];\n  for (var key in obj) {\n    pushEncodedKeyValuePair(pairs, key, obj[key]);\n  }\n  return pairs.join('&');\n}\n\n/**\n * Helps 'serialize' with serializing arrays.\n * Mutates the pairs array.\n *\n * @param {Array} pairs\n * @param {String} key\n * @param {Mixed} val\n */\n\nfunction pushEncodedKeyValuePair(pairs, key, val) {\n  if (val != null) {\n    if (Array.isArray(val)) {\n      val.forEach(function(v) {\n        pushEncodedKeyValuePair(pairs, key, v);\n      });\n    } else if (isObject(val)) {\n      for(var subkey in val) {\n        pushEncodedKeyValuePair(pairs, key + '[' + subkey + ']', val[subkey]);\n      }\n    } else {\n      pairs.push(encodeURIComponent(key)\n        + '=' + encodeURIComponent(val));\n    }\n  } else if (val === null) {\n    pairs.push(encodeURIComponent(key));\n  }\n}\n\n/**\n * Expose serialization method.\n */\n\nrequest.serializeObject = serialize;\n\n/**\n  * Parse the given x-www-form-urlencoded `str`.\n  *\n  * @param {String} str\n  * @return {Object}\n  * @api private\n  */\n\nfunction parseString(str) {\n  var obj = {};\n  var pairs = str.split('&');\n  var pair;\n  var pos;\n\n  for (var i = 0, len = pairs.length; i < len; ++i) {\n    pair = pairs[i];\n    pos = pair.indexOf('=');\n    if (pos == -1) {\n      obj[decodeURIComponent(pair)] = '';\n    } else {\n      obj[decodeURIComponent(pair.slice(0, pos))] =\n        decodeURIComponent(pair.slice(pos + 1));\n    }\n  }\n\n  return obj;\n}\n\n/**\n * Expose parser.\n */\n\nrequest.parseString = parseString;\n\n/**\n * Default MIME type map.\n *\n *     superagent.types.xml = 'application/xml';\n *\n */\n\nrequest.types = {\n  html: 'text/html',\n  json: 'application/json',\n  xml: 'text/xml',\n  urlencoded: 'application/x-www-form-urlencoded',\n  'form': 'application/x-www-form-urlencoded',\n  'form-data': 'application/x-www-form-urlencoded'\n};\n\n/**\n * Default serialization map.\n *\n *     superagent.serialize['application/xml'] = function(obj){\n *       return 'generated xml here';\n *     };\n *\n */\n\nrequest.serialize = {\n  'application/x-www-form-urlencoded': serialize,\n  'application/json': JSON.stringify,\n};\n\n/**\n  * Default parsers.\n  *\n  *     superagent.parse['application/xml'] = function(str){\n  *       return { object parsed from str };\n  *     };\n  *\n  */\n\nrequest.parse = {\n  'application/x-www-form-urlencoded': parseString,\n  'application/json': JSON.parse,\n};\n\n/**\n * Parse the given header `str` into\n * an object containing the mapped fields.\n *\n * @param {String} str\n * @return {Object}\n * @api private\n */\n\nfunction parseHeader(str) {\n  var lines = str.split(/\\r?\\n/);\n  var fields = {};\n  var index;\n  var line;\n  var field;\n  var val;\n\n  for (var i = 0, len = lines.length; i < len; ++i) {\n    line = lines[i];\n    index = line.indexOf(':');\n    if (index === -1) { // could be empty line, just skip it\n      continue;\n    }\n    field = line.slice(0, index).toLowerCase();\n    val = trim(line.slice(index + 1));\n    fields[field] = val;\n  }\n\n  return fields;\n}\n\n/**\n * Check if `mime` is json or has +json structured syntax suffix.\n *\n * @param {String} mime\n * @return {Boolean}\n * @api private\n */\n\nfunction isJSON(mime) {\n  // should match /json or +json\n  // but not /json-seq\n  return /[\\/+]json($|[^-\\w])/.test(mime);\n}\n\n/**\n * Initialize a new `Response` with the given `xhr`.\n *\n *  - set flags (.ok, .error, etc)\n *  - parse header\n *\n * Examples:\n *\n *  Aliasing `superagent` as `request` is nice:\n *\n *      request = superagent;\n *\n *  We can use the promise-like API, or pass callbacks:\n *\n *      request.get('/').end(function(res){});\n *      request.get('/', function(res){});\n *\n *  Sending data can be chained:\n *\n *      request\n *        .post('/user')\n *        .send({ name: 'tj' })\n *        .end(function(res){});\n *\n *  Or passed to `.send()`:\n *\n *      request\n *        .post('/user')\n *        .send({ name: 'tj' }, function(res){});\n *\n *  Or passed to `.post()`:\n *\n *      request\n *        .post('/user', { name: 'tj' })\n *        .end(function(res){});\n *\n * Or further reduced to a single call for simple cases:\n *\n *      request\n *        .post('/user', { name: 'tj' }, function(res){});\n *\n * @param {XMLHTTPRequest} xhr\n * @param {Object} options\n * @api private\n */\n\nfunction Response(req) {\n  this.req = req;\n  this.xhr = this.req.xhr;\n  // responseText is accessible only if responseType is '' or 'text' and on older browsers\n  this.text = ((this.req.method !='HEAD' && (this.xhr.responseType === '' || this.xhr.responseType === 'text')) || typeof this.xhr.responseType === 'undefined')\n     ? this.xhr.responseText\n     : null;\n  this.statusText = this.req.xhr.statusText;\n  var status = this.xhr.status;\n  // handle IE9 bug: http://stackoverflow.com/questions/10046972/msie-returns-status-code-of-1223-for-ajax-request\n  if (status === 1223) {\n    status = 204;\n  }\n  this._setStatusProperties(status);\n  this.header = this.headers = parseHeader(this.xhr.getAllResponseHeaders());\n  // getAllResponseHeaders sometimes falsely returns \"\" for CORS requests, but\n  // getResponseHeader still works. so we get content-type even if getting\n  // other headers fails.\n  this.header['content-type'] = this.xhr.getResponseHeader('content-type');\n  this._setHeaderProperties(this.header);\n\n  if (null === this.text && req._responseType) {\n    this.body = this.xhr.response;\n  } else {\n    this.body = this.req.method != 'HEAD'\n      ? this._parseBody(this.text ? this.text : this.xhr.response)\n      : null;\n  }\n}\n\nResponseBase(Response.prototype);\n\n/**\n * Parse the given body `str`.\n *\n * Used for auto-parsing of bodies. Parsers\n * are defined on the `superagent.parse` object.\n *\n * @param {String} str\n * @return {Mixed}\n * @api private\n */\n\nResponse.prototype._parseBody = function(str) {\n  var parse = request.parse[this.type];\n  if (this.req._parser) {\n    return this.req._parser(this, str);\n  }\n  if (!parse && isJSON(this.type)) {\n    parse = request.parse['application/json'];\n  }\n  return parse && str && (str.length || str instanceof Object)\n    ? parse(str)\n    : null;\n};\n\n/**\n * Return an `Error` representative of this response.\n *\n * @return {Error}\n * @api public\n */\n\nResponse.prototype.toError = function(){\n  var req = this.req;\n  var method = req.method;\n  var url = req.url;\n\n  var msg = 'cannot ' + method + ' ' + url + ' (' + this.status + ')';\n  var err = new Error(msg);\n  err.status = this.status;\n  err.method = method;\n  err.url = url;\n\n  return err;\n};\n\n/**\n * Expose `Response`.\n */\n\nrequest.Response = Response;\n\n/**\n * Initialize a new `Request` with the given `method` and `url`.\n *\n * @param {String} method\n * @param {String} url\n * @api public\n */\n\nfunction Request(method, url) {\n  var self = this;\n  this._query = this._query || [];\n  this.method = method;\n  this.url = url;\n  this.header = {}; // preserves header name case\n  this._header = {}; // coerces header names to lowercase\n  this.on('end', function(){\n    var err = null;\n    var res = null;\n\n    try {\n      res = new Response(self);\n    } catch(e) {\n      err = new Error('Parser is unable to parse the response');\n      err.parse = true;\n      err.original = e;\n      // issue #675: return the raw response if the response parsing fails\n      if (self.xhr) {\n        // ie9 doesn't have 'response' property\n        err.rawResponse = typeof self.xhr.responseType == 'undefined' ? self.xhr.responseText : self.xhr.response;\n        // issue #876: return the http status code if the response parsing fails\n        err.status = self.xhr.status ? self.xhr.status : null;\n        err.statusCode = err.status; // backwards-compat only\n      } else {\n        err.rawResponse = null;\n        err.status = null;\n      }\n\n      return self.callback(err);\n    }\n\n    self.emit('response', res);\n\n    var new_err;\n    try {\n      if (!self._isResponseOK(res)) {\n        new_err = new Error(res.statusText || 'Unsuccessful HTTP response');\n      }\n    } catch(custom_err) {\n      new_err = custom_err; // ok() callback can throw\n    }\n\n    // #1000 don't catch errors from the callback to avoid double calling it\n    if (new_err) {\n      new_err.original = err;\n      new_err.response = res;\n      new_err.status = res.status;\n      self.callback(new_err, res);\n    } else {\n      self.callback(null, res);\n    }\n  });\n}\n\n/**\n * Mixin `Emitter` and `RequestBase`.\n */\n\nEmitter(Request.prototype);\nRequestBase(Request.prototype);\n\n/**\n * Set Content-Type to `type`, mapping values from `request.types`.\n *\n * Examples:\n *\n *      superagent.types.xml = 'application/xml';\n *\n *      request.post('/')\n *        .type('xml')\n *        .send(xmlstring)\n *        .end(callback);\n *\n *      request.post('/')\n *        .type('application/xml')\n *        .send(xmlstring)\n *        .end(callback);\n *\n * @param {String} type\n * @return {Request} for chaining\n * @api public\n */\n\nRequest.prototype.type = function(type){\n  this.set('Content-Type', request.types[type] || type);\n  return this;\n};\n\n/**\n * Set Accept to `type`, mapping values from `request.types`.\n *\n * Examples:\n *\n *      superagent.types.json = 'application/json';\n *\n *      request.get('/agent')\n *        .accept('json')\n *        .end(callback);\n *\n *      request.get('/agent')\n *        .accept('application/json')\n *        .end(callback);\n *\n * @param {String} accept\n * @return {Request} for chaining\n * @api public\n */\n\nRequest.prototype.accept = function(type){\n  this.set('Accept', request.types[type] || type);\n  return this;\n};\n\n/**\n * Set Authorization field value with `user` and `pass`.\n *\n * @param {String} user\n * @param {String} [pass] optional in case of using 'bearer' as type\n * @param {Object} options with 'type' property 'auto', 'basic' or 'bearer' (default 'basic')\n * @return {Request} for chaining\n * @api public\n */\n\nRequest.prototype.auth = function(user, pass, options){\n  if (1 === arguments.length) pass = '';\n  if (typeof pass === 'object' && pass !== null) { // pass is optional and can be replaced with options\n    options = pass;\n    pass = '';\n  }\n  if (!options) {\n    options = {\n      type: 'function' === typeof btoa ? 'basic' : 'auto',\n    };\n  }\n\n  var encoder = function(string) {\n    if ('function' === typeof btoa) {\n      return btoa(string);\n    }\n    throw new Error('Cannot use basic auth, btoa is not a function');\n  };\n\n  return this._auth(user, pass, options, encoder);\n};\n\n/**\n * Add query-string `val`.\n *\n * Examples:\n *\n *   request.get('/shoes')\n *     .query('size=10')\n *     .query({ color: 'blue' })\n *\n * @param {Object|String} val\n * @return {Request} for chaining\n * @api public\n */\n\nRequest.prototype.query = function(val){\n  if ('string' != typeof val) val = serialize(val);\n  if (val) this._query.push(val);\n  return this;\n};\n\n/**\n * Queue the given `file` as an attachment to the specified `field`,\n * with optional `options` (or filename).\n *\n * ``` js\n * request.post('/upload')\n *   .attach('content', new Blob(['<a id=\"a\"><b id=\"b\">hey!</b></a>'], { type: \"text/html\"}))\n *   .end(callback);\n * ```\n *\n * @param {String} field\n * @param {Blob|File} file\n * @param {String|Object} options\n * @return {Request} for chaining\n * @api public\n */\n\nRequest.prototype.attach = function(field, file, options){\n  if (file) {\n    if (this._data) {\n      throw Error(\"superagent can't mix .send() and .attach()\");\n    }\n\n    this._getFormData().append(field, file, options || file.name);\n  }\n  return this;\n};\n\nRequest.prototype._getFormData = function(){\n  if (!this._formData) {\n    this._formData = new root.FormData();\n  }\n  return this._formData;\n};\n\n/**\n * Invoke the callback with `err` and `res`\n * and handle arity check.\n *\n * @param {Error} err\n * @param {Response} res\n * @api private\n */\n\nRequest.prototype.callback = function(err, res){\n  if (this._shouldRetry(err, res)) {\n    return this._retry();\n  }\n\n  var fn = this._callback;\n  this.clearTimeout();\n\n  if (err) {\n    if (this._maxRetries) err.retries = this._retries - 1;\n    this.emit('error', err);\n  }\n\n  fn(err, res);\n};\n\n/**\n * Invoke callback with x-domain error.\n *\n * @api private\n */\n\nRequest.prototype.crossDomainError = function(){\n  var err = new Error('Request has been terminated\\nPossible causes: the network is offline, Origin is not allowed by Access-Control-Allow-Origin, the page is being unloaded, etc.');\n  err.crossDomain = true;\n\n  err.status = this.status;\n  err.method = this.method;\n  err.url = this.url;\n\n  this.callback(err);\n};\n\n// This only warns, because the request is still likely to work\nRequest.prototype.buffer = Request.prototype.ca = Request.prototype.agent = function(){\n  console.warn(\"This is not supported in browser version of superagent\");\n  return this;\n};\n\n// This throws, because it can't send/receive data as expected\nRequest.prototype.pipe = Request.prototype.write = function(){\n  throw Error(\"Streaming is not supported in browser version of superagent\");\n};\n\n/**\n * Check if `obj` is a host object,\n * we don't want to serialize these :)\n *\n * @param {Object} obj\n * @return {Boolean}\n * @api private\n */\nRequest.prototype._isHost = function _isHost(obj) {\n  // Native objects stringify to [object File], [object Blob], [object FormData], etc.\n  return obj && 'object' === typeof obj && !Array.isArray(obj) && Object.prototype.toString.call(obj) !== '[object Object]';\n}\n\n/**\n * Initiate request, invoking callback `fn(res)`\n * with an instanceof `Response`.\n *\n * @param {Function} fn\n * @return {Request} for chaining\n * @api public\n */\n\nRequest.prototype.end = function(fn){\n  if (this._endCalled) {\n    console.warn(\"Warning: .end() was called twice. This is not supported in superagent\");\n  }\n  this._endCalled = true;\n\n  // store callback\n  this._callback = fn || noop;\n\n  // querystring\n  this._finalizeQueryString();\n\n  return this._end();\n};\n\nRequest.prototype._end = function() {\n  var self = this;\n  var xhr = (this.xhr = request.getXHR());\n  var data = this._formData || this._data;\n\n  this._setTimeouts();\n\n  // state change\n  xhr.onreadystatechange = function(){\n    var readyState = xhr.readyState;\n    if (readyState >= 2 && self._responseTimeoutTimer) {\n      clearTimeout(self._responseTimeoutTimer);\n    }\n    if (4 != readyState) {\n      return;\n    }\n\n    // In IE9, reads to any property (e.g. status) off of an aborted XHR will\n    // result in the error \"Could not complete the operation due to error c00c023f\"\n    var status;\n    try { status = xhr.status } catch(e) { status = 0; }\n\n    if (!status) {\n      if (self.timedout || self._aborted) return;\n      return self.crossDomainError();\n    }\n    self.emit('end');\n  };\n\n  // progress\n  var handleProgress = function(direction, e) {\n    if (e.total > 0) {\n      e.percent = e.loaded / e.total * 100;\n    }\n    e.direction = direction;\n    self.emit('progress', e);\n  };\n  if (this.hasListeners('progress')) {\n    try {\n      xhr.onprogress = handleProgress.bind(null, 'download');\n      if (xhr.upload) {\n        xhr.upload.onprogress = handleProgress.bind(null, 'upload');\n      }\n    } catch(e) {\n      // Accessing xhr.upload fails in IE from a web worker, so just pretend it doesn't exist.\n      // Reported here:\n      // https://connect.microsoft.com/IE/feedback/details/837245/xmlhttprequest-upload-throws-invalid-argument-when-used-from-web-worker-context\n    }\n  }\n\n  // initiate request\n  try {\n    if (this.username && this.password) {\n      xhr.open(this.method, this.url, true, this.username, this.password);\n    } else {\n      xhr.open(this.method, this.url, true);\n    }\n  } catch (err) {\n    // see #1149\n    return this.callback(err);\n  }\n\n  // CORS\n  if (this._withCredentials) xhr.withCredentials = true;\n\n  // body\n  if (!this._formData && 'GET' != this.method && 'HEAD' != this.method && 'string' != typeof data && !this._isHost(data)) {\n    // serialize stuff\n    var contentType = this._header['content-type'];\n    var serialize = this._serializer || request.serialize[contentType ? contentType.split(';')[0] : ''];\n    if (!serialize && isJSON(contentType)) {\n      serialize = request.serialize['application/json'];\n    }\n    if (serialize) data = serialize(data);\n  }\n\n  // set header fields\n  for (var field in this.header) {\n    if (null == this.header[field]) continue;\n\n    if (this.header.hasOwnProperty(field))\n      xhr.setRequestHeader(field, this.header[field]);\n  }\n\n  if (this._responseType) {\n    xhr.responseType = this._responseType;\n  }\n\n  // send stuff\n  this.emit('request', this);\n\n  // IE11 xhr.send(undefined) sends 'undefined' string as POST payload (instead of nothing)\n  // We need null here if data is undefined\n  xhr.send(typeof data !== 'undefined' ? data : null);\n  return this;\n};\n\nrequest.agent = function() {\n  return new Agent();\n};\n\n[\"GET\", \"POST\", \"OPTIONS\", \"PATCH\", \"PUT\", \"DELETE\"].forEach(function(method) {\n  Agent.prototype[method.toLowerCase()] = function(url, fn) {\n    var req = new request.Request(method, url);\n    this._setDefaults(req);\n    if (fn) {\n      req.end(fn);\n    }\n    return req;\n  };\n});\n\nAgent.prototype.del = Agent.prototype['delete'];\n\n/**\n * GET `url` with optional callback `fn(res)`.\n *\n * @param {String} url\n * @param {Mixed|Function} [data] or fn\n * @param {Function} [fn]\n * @return {Request}\n * @api public\n */\n\nrequest.get = function(url, data, fn) {\n  var req = request('GET', url);\n  if ('function' == typeof data) (fn = data), (data = null);\n  if (data) req.query(data);\n  if (fn) req.end(fn);\n  return req;\n};\n\n/**\n * HEAD `url` with optional callback `fn(res)`.\n *\n * @param {String} url\n * @param {Mixed|Function} [data] or fn\n * @param {Function} [fn]\n * @return {Request}\n * @api public\n */\n\nrequest.head = function(url, data, fn) {\n  var req = request('HEAD', url);\n  if ('function' == typeof data) (fn = data), (data = null);\n  if (data) req.query(data);\n  if (fn) req.end(fn);\n  return req;\n};\n\n/**\n * OPTIONS query to `url` with optional callback `fn(res)`.\n *\n * @param {String} url\n * @param {Mixed|Function} [data] or fn\n * @param {Function} [fn]\n * @return {Request}\n * @api public\n */\n\nrequest.options = function(url, data, fn) {\n  var req = request('OPTIONS', url);\n  if ('function' == typeof data) (fn = data), (data = null);\n  if (data) req.send(data);\n  if (fn) req.end(fn);\n  return req;\n};\n\n/**\n * DELETE `url` with optional `data` and callback `fn(res)`.\n *\n * @param {String} url\n * @param {Mixed} [data]\n * @param {Function} [fn]\n * @return {Request}\n * @api public\n */\n\nfunction del(url, data, fn) {\n  var req = request('DELETE', url);\n  if ('function' == typeof data) (fn = data), (data = null);\n  if (data) req.send(data);\n  if (fn) req.end(fn);\n  return req;\n}\n\nrequest['del'] = del;\nrequest['delete'] = del;\n\n/**\n * PATCH `url` with optional `data` and callback `fn(res)`.\n *\n * @param {String} url\n * @param {Mixed} [data]\n * @param {Function} [fn]\n * @return {Request}\n * @api public\n */\n\nrequest.patch = function(url, data, fn) {\n  var req = request('PATCH', url);\n  if ('function' == typeof data) (fn = data), (data = null);\n  if (data) req.send(data);\n  if (fn) req.end(fn);\n  return req;\n};\n\n/**\n * POST `url` with optional `data` and callback `fn(res)`.\n *\n * @param {String} url\n * @param {Mixed} [data]\n * @param {Function} [fn]\n * @return {Request}\n * @api public\n */\n\nrequest.post = function(url, data, fn) {\n  var req = request('POST', url);\n  if ('function' == typeof data) (fn = data), (data = null);\n  if (data) req.send(data);\n  if (fn) req.end(fn);\n  return req;\n};\n\n/**\n * PUT `url` with optional `data` and callback `fn(res)`.\n *\n * @param {String} url\n * @param {Mixed|Function} [data] or fn\n * @param {Function} [fn]\n * @return {Request}\n * @api public\n */\n\nrequest.put = function(url, data, fn) {\n  var req = request('PUT', url);\n  if ('function' == typeof data) (fn = data), (data = null);\n  if (data) req.send(data);\n  if (fn) req.end(fn);\n  return req;\n};\n","'use strict';\n\n/**\n * Check if `obj` is an object.\n *\n * @param {Object} obj\n * @return {Boolean}\n * @api private\n */\n\nfunction isObject(obj) {\n  return null !== obj && 'object' === typeof obj;\n}\n\nmodule.exports = isObject;\n","'use strict';\n\n/**\n * Module of mixed-in functions shared between node and client code\n */\nvar isObject = require('./is-object');\n\n/**\n * Expose `RequestBase`.\n */\n\nmodule.exports = RequestBase;\n\n/**\n * Initialize a new `RequestBase`.\n *\n * @api public\n */\n\nfunction RequestBase(obj) {\n  if (obj) return mixin(obj);\n}\n\n/**\n * Mixin the prototype properties.\n *\n * @param {Object} obj\n * @return {Object}\n * @api private\n */\n\nfunction mixin(obj) {\n  for (var key in RequestBase.prototype) {\n    obj[key] = RequestBase.prototype[key];\n  }\n  return obj;\n}\n\n/**\n * Clear previous timeout.\n *\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.clearTimeout = function _clearTimeout(){\n  clearTimeout(this._timer);\n  clearTimeout(this._responseTimeoutTimer);\n  delete this._timer;\n  delete this._responseTimeoutTimer;\n  return this;\n};\n\n/**\n * Override default response body parser\n *\n * This function will be called to convert incoming data into request.body\n *\n * @param {Function}\n * @api public\n */\n\nRequestBase.prototype.parse = function parse(fn){\n  this._parser = fn;\n  return this;\n};\n\n/**\n * Set format of binary response body.\n * In browser valid formats are 'blob' and 'arraybuffer',\n * which return Blob and ArrayBuffer, respectively.\n *\n * In Node all values result in Buffer.\n *\n * Examples:\n *\n *      req.get('/')\n *        .responseType('blob')\n *        .end(callback);\n *\n * @param {String} val\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.responseType = function(val){\n  this._responseType = val;\n  return this;\n};\n\n/**\n * Override default request body serializer\n *\n * This function will be called to convert data set via .send or .attach into payload to send\n *\n * @param {Function}\n * @api public\n */\n\nRequestBase.prototype.serialize = function serialize(fn){\n  this._serializer = fn;\n  return this;\n};\n\n/**\n * Set timeouts.\n *\n * - response timeout is time between sending request and receiving the first byte of the response. Includes DNS and connection time.\n * - deadline is the time from start of the request to receiving response body in full. If the deadline is too short large files may not load at all on slow connections.\n *\n * Value of 0 or false means no timeout.\n *\n * @param {Number|Object} ms or {response, deadline}\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.timeout = function timeout(options){\n  if (!options || 'object' !== typeof options) {\n    this._timeout = options;\n    this._responseTimeout = 0;\n    return this;\n  }\n\n  for(var option in options) {\n    switch(option) {\n      case 'deadline':\n        this._timeout = options.deadline;\n        break;\n      case 'response':\n        this._responseTimeout = options.response;\n        break;\n      default:\n        console.warn(\"Unknown timeout option\", option);\n    }\n  }\n  return this;\n};\n\n/**\n * Set number of retry attempts on error.\n *\n * Failed requests will be retried 'count' times if timeout or err.code >= 500.\n *\n * @param {Number} count\n * @param {Function} [fn]\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.retry = function retry(count, fn){\n  // Default to 1 if no count passed or true\n  if (arguments.length === 0 || count === true) count = 1;\n  if (count <= 0) count = 0;\n  this._maxRetries = count;\n  this._retries = 0;\n  this._retryCallback = fn;\n  return this;\n};\n\nvar ERROR_CODES = [\n  'ECONNRESET',\n  'ETIMEDOUT',\n  'EADDRINFO',\n  'ESOCKETTIMEDOUT'\n];\n\n/**\n * Determine if a request should be retried.\n * (Borrowed from segmentio/superagent-retry)\n *\n * @param {Error} err\n * @param {Response} [res]\n * @returns {Boolean}\n */\nRequestBase.prototype._shouldRetry = function(err, res) {\n  if (!this._maxRetries || this._retries++ >= this._maxRetries) {\n    return false;\n  }\n  if (this._retryCallback) {\n    try {\n      var override = this._retryCallback(err, res);\n      if (override === true) return true;\n      if (override === false) return false;\n      // undefined falls back to defaults\n    } catch(e) {\n      console.error(e);\n    }\n  }\n  if (res && res.status && res.status >= 500 && res.status != 501) return true;\n  if (err) {\n    if (err.code && ~ERROR_CODES.indexOf(err.code)) return true;\n    // Superagent timeout\n    if (err.timeout && err.code == 'ECONNABORTED') return true;\n    if (err.crossDomain) return true;\n  }\n  return false;\n};\n\n/**\n * Retry request\n *\n * @return {Request} for chaining\n * @api private\n */\n\nRequestBase.prototype._retry = function() {\n\n  this.clearTimeout();\n\n  // node\n  if (this.req) {\n    this.req = null;\n    this.req = this.request();\n  }\n\n  this._aborted = false;\n  this.timedout = false;\n\n  return this._end();\n};\n\n/**\n * Promise support\n *\n * @param {Function} resolve\n * @param {Function} [reject]\n * @return {Request}\n */\n\nRequestBase.prototype.then = function then(resolve, reject) {\n  if (!this._fullfilledPromise) {\n    var self = this;\n    if (this._endCalled) {\n      console.warn(\"Warning: superagent request was sent twice, because both .end() and .then() were called. Never call .end() if you use promises\");\n    }\n    this._fullfilledPromise = new Promise(function(innerResolve, innerReject) {\n      self.end(function(err, res) {\n        if (err) innerReject(err);\n        else innerResolve(res);\n      });\n    });\n  }\n  return this._fullfilledPromise.then(resolve, reject);\n};\n\nRequestBase.prototype.catch = function(cb) {\n  return this.then(undefined, cb);\n};\n\n/**\n * Allow for extension\n */\n\nRequestBase.prototype.use = function use(fn) {\n  fn(this);\n  return this;\n};\n\nRequestBase.prototype.ok = function(cb) {\n  if ('function' !== typeof cb) throw Error(\"Callback required\");\n  this._okCallback = cb;\n  return this;\n};\n\nRequestBase.prototype._isResponseOK = function(res) {\n  if (!res) {\n    return false;\n  }\n\n  if (this._okCallback) {\n    return this._okCallback(res);\n  }\n\n  return res.status >= 200 && res.status < 300;\n};\n\n/**\n * Get request header `field`.\n * Case-insensitive.\n *\n * @param {String} field\n * @return {String}\n * @api public\n */\n\nRequestBase.prototype.get = function(field){\n  return this._header[field.toLowerCase()];\n};\n\n/**\n * Get case-insensitive header `field` value.\n * This is a deprecated internal API. Use `.get(field)` instead.\n *\n * (getHeader is no longer used internally by the superagent code base)\n *\n * @param {String} field\n * @return {String}\n * @api private\n * @deprecated\n */\n\nRequestBase.prototype.getHeader = RequestBase.prototype.get;\n\n/**\n * Set header `field` to `val`, or multiple fields with one object.\n * Case-insensitive.\n *\n * Examples:\n *\n *      req.get('/')\n *        .set('Accept', 'application/json')\n *        .set('X-API-Key', 'foobar')\n *        .end(callback);\n *\n *      req.get('/')\n *        .set({ Accept: 'application/json', 'X-API-Key': 'foobar' })\n *        .end(callback);\n *\n * @param {String|Object} field\n * @param {String} val\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.set = function(field, val){\n  if (isObject(field)) {\n    for (var key in field) {\n      this.set(key, field[key]);\n    }\n    return this;\n  }\n  this._header[field.toLowerCase()] = val;\n  this.header[field] = val;\n  return this;\n};\n\n/**\n * Remove header `field`.\n * Case-insensitive.\n *\n * Example:\n *\n *      req.get('/')\n *        .unset('User-Agent')\n *        .end(callback);\n *\n * @param {String} field\n */\nRequestBase.prototype.unset = function(field){\n  delete this._header[field.toLowerCase()];\n  delete this.header[field];\n  return this;\n};\n\n/**\n * Write the field `name` and `val`, or multiple fields with one object\n * for \"multipart/form-data\" request bodies.\n *\n * ``` js\n * request.post('/upload')\n *   .field('foo', 'bar')\n *   .end(callback);\n *\n * request.post('/upload')\n *   .field({ foo: 'bar', baz: 'qux' })\n *   .end(callback);\n * ```\n *\n * @param {String|Object} name\n * @param {String|Blob|File|Buffer|fs.ReadStream} val\n * @return {Request} for chaining\n * @api public\n */\nRequestBase.prototype.field = function(name, val) {\n  // name should be either a string or an object.\n  if (null === name || undefined === name) {\n    throw new Error('.field(name, val) name can not be empty');\n  }\n\n  if (this._data) {\n    console.error(\".field() can't be used if .send() is used. Please use only .send() or only .field() & .attach()\");\n  }\n\n  if (isObject(name)) {\n    for (var key in name) {\n      this.field(key, name[key]);\n    }\n    return this;\n  }\n\n  if (Array.isArray(val)) {\n    for (var i in val) {\n      this.field(name, val[i]);\n    }\n    return this;\n  }\n\n  // val should be defined now\n  if (null === val || undefined === val) {\n    throw new Error('.field(name, val) val can not be empty');\n  }\n  if ('boolean' === typeof val) {\n    val = '' + val;\n  }\n  this._getFormData().append(name, val);\n  return this;\n};\n\n/**\n * Abort the request, and clear potential timeout.\n *\n * @return {Request}\n * @api public\n */\nRequestBase.prototype.abort = function(){\n  if (this._aborted) {\n    return this;\n  }\n  this._aborted = true;\n  this.xhr && this.xhr.abort(); // browser\n  this.req && this.req.abort(); // node\n  this.clearTimeout();\n  this.emit('abort');\n  return this;\n};\n\nRequestBase.prototype._auth = function(user, pass, options, base64Encoder) {\n  switch (options.type) {\n    case 'basic':\n      this.set('Authorization', 'Basic ' + base64Encoder(user + ':' + pass));\n      break;\n\n    case 'auto':\n      this.username = user;\n      this.password = pass;\n      break;\n\n    case 'bearer': // usage would be .auth(accessToken, { type: 'bearer' })\n      this.set('Authorization', 'Bearer ' + user);\n      break;\n  }\n  return this;\n};\n\n/**\n * Enable transmission of cookies with x-domain requests.\n *\n * Note that for this to work the origin must not be\n * using \"Access-Control-Allow-Origin\" with a wildcard,\n * and also must set \"Access-Control-Allow-Credentials\"\n * to \"true\".\n *\n * @api public\n */\n\nRequestBase.prototype.withCredentials = function(on) {\n  // This is browser-only functionality. Node side is no-op.\n  if (on == undefined) on = true;\n  this._withCredentials = on;\n  return this;\n};\n\n/**\n * Set the max redirects to `n`. Does noting in browser XHR implementation.\n *\n * @param {Number} n\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.redirects = function(n){\n  this._maxRedirects = n;\n  return this;\n};\n\n/**\n * Maximum size of buffered response body, in bytes. Counts uncompressed size.\n * Default 200MB.\n *\n * @param {Number} n\n * @return {Request} for chaining\n */\nRequestBase.prototype.maxResponseSize = function(n){\n  if ('number' !== typeof n) {\n    throw TypeError(\"Invalid argument\");\n  }\n  this._maxResponseSize = n;\n  return this;\n};\n\n/**\n * Convert to a plain javascript object (not JSON string) of scalar properties.\n * Note as this method is designed to return a useful non-this value,\n * it cannot be chained.\n *\n * @return {Object} describing method, url, and data of this request\n * @api public\n */\n\nRequestBase.prototype.toJSON = function() {\n  return {\n    method: this.method,\n    url: this.url,\n    data: this._data,\n    headers: this._header,\n  };\n};\n\n/**\n * Send `data` as the request body, defaulting the `.type()` to \"json\" when\n * an object is given.\n *\n * Examples:\n *\n *       // manual json\n *       request.post('/user')\n *         .type('json')\n *         .send('{\"name\":\"tj\"}')\n *         .end(callback)\n *\n *       // auto json\n *       request.post('/user')\n *         .send({ name: 'tj' })\n *         .end(callback)\n *\n *       // manual x-www-form-urlencoded\n *       request.post('/user')\n *         .type('form')\n *         .send('name=tj')\n *         .end(callback)\n *\n *       // auto x-www-form-urlencoded\n *       request.post('/user')\n *         .type('form')\n *         .send({ name: 'tj' })\n *         .end(callback)\n *\n *       // defaults to x-www-form-urlencoded\n *      request.post('/user')\n *        .send('name=tobi')\n *        .send('species=ferret')\n *        .end(callback)\n *\n * @param {String|Object} data\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.send = function(data){\n  var isObj = isObject(data);\n  var type = this._header['content-type'];\n\n  if (this._formData) {\n    console.error(\".send() can't be used if .attach() or .field() is used. Please use only .send() or only .field() & .attach()\");\n  }\n\n  if (isObj && !this._data) {\n    if (Array.isArray(data)) {\n      this._data = [];\n    } else if (!this._isHost(data)) {\n      this._data = {};\n    }\n  } else if (data && this._data && this._isHost(this._data)) {\n    throw Error(\"Can't merge these send calls\");\n  }\n\n  // merge\n  if (isObj && isObject(this._data)) {\n    for (var key in data) {\n      this._data[key] = data[key];\n    }\n  } else if ('string' == typeof data) {\n    // default to x-www-form-urlencoded\n    if (!type) this.type('form');\n    type = this._header['content-type'];\n    if ('application/x-www-form-urlencoded' == type) {\n      this._data = this._data\n        ? this._data + '&' + data\n        : data;\n    } else {\n      this._data = (this._data || '') + data;\n    }\n  } else {\n    this._data = data;\n  }\n\n  if (!isObj || this._isHost(data)) {\n    return this;\n  }\n\n  // default to json\n  if (!type) this.type('json');\n  return this;\n};\n\n/**\n * Sort `querystring` by the sort function\n *\n *\n * Examples:\n *\n *       // default order\n *       request.get('/user')\n *         .query('name=Nick')\n *         .query('search=Manny')\n *         .sortQuery()\n *         .end(callback)\n *\n *       // customized sort function\n *       request.get('/user')\n *         .query('name=Nick')\n *         .query('search=Manny')\n *         .sortQuery(function(a, b){\n *           return a.length - b.length;\n *         })\n *         .end(callback)\n *\n *\n * @param {Function} sort\n * @return {Request} for chaining\n * @api public\n */\n\nRequestBase.prototype.sortQuery = function(sort) {\n  // _sort default to true but otherwise can be a function or boolean\n  this._sort = typeof sort === 'undefined' ? true : sort;\n  return this;\n};\n\n/**\n * Compose querystring to append to req.url\n *\n * @api private\n */\nRequestBase.prototype._finalizeQueryString = function(){\n  var query = this._query.join('&');\n  if (query) {\n    this.url += (this.url.indexOf('?') >= 0 ? '&' : '?') + query;\n  }\n  this._query.length = 0; // Makes the call idempotent\n\n  if (this._sort) {\n    var index = this.url.indexOf('?');\n    if (index >= 0) {\n      var queryArr = this.url.substring(index + 1).split('&');\n      if ('function' === typeof this._sort) {\n        queryArr.sort(this._sort);\n      } else {\n        queryArr.sort();\n      }\n      this.url = this.url.substring(0, index) + '?' + queryArr.join('&');\n    }\n  }\n};\n\n// For backwards compat only\nRequestBase.prototype._appendQueryString = function() {console.trace(\"Unsupported\");}\n\n/**\n * Invoke callback with timeout error.\n *\n * @api private\n */\n\nRequestBase.prototype._timeoutError = function(reason, timeout, errno){\n  if (this._aborted) {\n    return;\n  }\n  var err = new Error(reason + timeout + 'ms exceeded');\n  err.timeout = timeout;\n  err.code = 'ECONNABORTED';\n  err.errno = errno;\n  this.timedout = true;\n  this.abort();\n  this.callback(err);\n};\n\nRequestBase.prototype._setTimeouts = function() {\n  var self = this;\n\n  // deadline\n  if (this._timeout && !this._timer) {\n    this._timer = setTimeout(function(){\n      self._timeoutError('Timeout of ', self._timeout, 'ETIME');\n    }, this._timeout);\n  }\n  // response timeout\n  if (this._responseTimeout && !this._responseTimeoutTimer) {\n    this._responseTimeoutTimer = setTimeout(function(){\n      self._timeoutError('Response timeout of ', self._responseTimeout, 'ETIMEDOUT');\n    }, this._responseTimeout);\n  }\n};\n","'use strict';\n\n/**\n * Module dependencies.\n */\n\nvar utils = require('./utils');\n\n/**\n * Expose `ResponseBase`.\n */\n\nmodule.exports = ResponseBase;\n\n/**\n * Initialize a new `ResponseBase`.\n *\n * @api public\n */\n\nfunction ResponseBase(obj) {\n  if (obj) return mixin(obj);\n}\n\n/**\n * Mixin the prototype properties.\n *\n * @param {Object} obj\n * @return {Object}\n * @api private\n */\n\nfunction mixin(obj) {\n  for (var key in ResponseBase.prototype) {\n    obj[key] = ResponseBase.prototype[key];\n  }\n  return obj;\n}\n\n/**\n * Get case-insensitive `field` value.\n *\n * @param {String} field\n * @return {String}\n * @api public\n */\n\nResponseBase.prototype.get = function(field) {\n  return this.header[field.toLowerCase()];\n};\n\n/**\n * Set header related properties:\n *\n *   - `.type` the content type without params\n *\n * A response of \"Content-Type: text/plain; charset=utf-8\"\n * will provide you with a `.type` of \"text/plain\".\n *\n * @param {Object} header\n * @api private\n */\n\nResponseBase.prototype._setHeaderProperties = function(header){\n    // TODO: moar!\n    // TODO: make this a util\n\n    // content-type\n    var ct = header['content-type'] || '';\n    this.type = utils.type(ct);\n\n    // params\n    var params = utils.params(ct);\n    for (var key in params) this[key] = params[key];\n\n    this.links = {};\n\n    // links\n    try {\n        if (header.link) {\n            this.links = utils.parseLinks(header.link);\n        }\n    } catch (err) {\n        // ignore\n    }\n};\n\n/**\n * Set flags such as `.ok` based on `status`.\n *\n * For example a 2xx response will give you a `.ok` of __true__\n * whereas 5xx will be __false__ and `.error` will be __true__. The\n * `.clientError` and `.serverError` are also available to be more\n * specific, and `.statusType` is the class of error ranging from 1..5\n * sometimes useful for mapping respond colors etc.\n *\n * \"sugar\" properties are also defined for common cases. Currently providing:\n *\n *   - .noContent\n *   - .badRequest\n *   - .unauthorized\n *   - .notAcceptable\n *   - .notFound\n *\n * @param {Number} status\n * @api private\n */\n\nResponseBase.prototype._setStatusProperties = function(status){\n    var type = status / 100 | 0;\n\n    // status / class\n    this.status = this.statusCode = status;\n    this.statusType = type;\n\n    // basics\n    this.info = 1 == type;\n    this.ok = 2 == type;\n    this.redirect = 3 == type;\n    this.clientError = 4 == type;\n    this.serverError = 5 == type;\n    this.error = (4 == type || 5 == type)\n        ? this.toError()\n        : false;\n\n    // sugar\n    this.accepted = 202 == status;\n    this.noContent = 204 == status;\n    this.badRequest = 400 == status;\n    this.unauthorized = 401 == status;\n    this.notAcceptable = 406 == status;\n    this.forbidden = 403 == status;\n    this.notFound = 404 == status;\n};\n","'use strict';\n\n/**\n * Return the mime type for the given `str`.\n *\n * @param {String} str\n * @return {String}\n * @api private\n */\n\nexports.type = function(str){\n  return str.split(/ *; */).shift();\n};\n\n/**\n * Return header field parameters.\n *\n * @param {String} str\n * @return {Object}\n * @api private\n */\n\nexports.params = function(str){\n  return str.split(/ *; */).reduce(function(obj, str){\n    var parts = str.split(/ *= */);\n    var key = parts.shift();\n    var val = parts.shift();\n\n    if (key && val) obj[key] = val;\n    return obj;\n  }, {});\n};\n\n/**\n * Parse Link header fields.\n *\n * @param {String} str\n * @return {Object}\n * @api private\n */\n\nexports.parseLinks = function(str){\n  return str.split(/ *, */).reduce(function(obj, str){\n    var parts = str.split(/ *; */);\n    var url = parts[0].slice(1, -1);\n    var rel = parts[1].split(/ *= */)[1].slice(1, -1);\n    obj[rel] = url;\n    return obj;\n  }, {});\n};\n\n/**\n * Strip content related fields from `header`.\n *\n * @param {Object} header\n * @return {Object} header\n * @api private\n */\n\nexports.cleanHeader = function(header, changesOrigin){\n  delete header['content-type'];\n  delete header['content-length'];\n  delete header['transfer-encoding'];\n  delete header['host'];\n  // secuirty\n  if (changesOrigin) {\n    delete header['authorization'];\n    delete header['cookie'];\n  }\n  return header;\n};\n","/*\n * The MIT License (MIT)\n *\n * Copyright (c) 2014 Apigee Corporation\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nvar urlParse = require('url').parse;\nvar clone = require('lodash.clonedeep');\n\nvar primitiveTypes = [\n  'string',\n  'number',\n  'boolean',\n  'integer',\n  'array',\n  'void',\n  'File'\n];\n\nif (typeof window === 'undefined') {\n  module.exports = convert;\n} else {\n  window.SwaggerConverter = window.SwaggerConverter || {\n    convert: convert\n  };\n}\n\n/*\n * Converts Swagger 1.2 specs file to Swagger 2.0 specs.\n * @param resourceListing {object} - root Swagger 1.2 document where it has a\n *  list of all paths\n * @param apiDeclarations {array} - a list of all resources listed in\n * resourceListing. Array of objects\n * @returns {object} - Fully converted Swagger 2.0 document\n*/\nfunction convert(resourceListing, apiDeclarations) {\n  if (typeof resourceListing !== 'object') {\n    throw new Error('resourceListing must be an object');\n  }\n  if (!Array.isArray(apiDeclarations)) {\n    apiDeclarations = [];\n  }\n\n  var convertedSecurityNames = {};\n  var models = {};\n  var result = {\n    swagger: '2.0',\n    info: buildInfo(resourceListing),\n    paths: {}\n  };\n\n  if (resourceListing.authorizations) {\n    result.securityDefinitions = buildSecurityDefinitions(resourceListing,\n      convertedSecurityNames);\n  }\n\n  if (resourceListing.basePath) {\n    assignPathComponents(resourceListing.basePath, result);\n  }\n\n  extend(models, resourceListing.models);\n\n  // Handle embedded documents\n  if (Array.isArray(resourceListing.apis)) {\n    if (apiDeclarations.length > 0) {\n      result.tags = [];\n    }\n    resourceListing.apis.forEach(function(api) {\n      if (result.tags) {\n        result.tags.push({\n          'name': api.path.replace('.{format}', '').substring(1),\n          'description': api.description});\n      }\n      if (Array.isArray(api.operations)) {\n        result.paths[api.path] = buildPath(api, resourceListing);\n      }\n    });\n  }\n\n  apiDeclarations.forEach(function(apiDeclaration) {\n\n    // For each apiDeclaration if there is a basePath, assign path components\n    // This might override previous assignments\n    if (apiDeclaration.basePath) {\n      assignPathComponents(apiDeclaration.basePath, result);\n    }\n\n    if (!Array.isArray(apiDeclaration.apis)) { return; }\n    apiDeclaration.apis.forEach(function(api) {\n      result.paths[api.path] = buildPath(api, apiDeclaration);\n\n    });\n    if (apiDeclaration.models && Object.keys(apiDeclaration.models).length) {\n      extend(models, transformAllModels(apiDeclaration.models));\n    }\n  });\n\n  if (Object.keys(models).length) {\n    result.definitions = transformAllModels(models);\n  }\n\n  return result;\n}\n\n/*\n * Builds \"info\" section of Swagger 2.0 document\n * @param source {object} - Swagger 1.2 document object\n * @returns {object} - \"info\" section of Swagger 2.0 document\n*/\nfunction buildInfo(source) {\n  var info = {\n    version: source.apiVersion,\n    title: 'Title was not specified'\n  };\n\n  if (typeof source.info === 'object') {\n\n    if (source.info.title) {\n      info.title = source.info.title;\n    }\n\n    if (source.info.description) {\n      info.description = source.info.description;\n    }\n\n    if (source.info.contact) {\n      info.contact = {\n        email: source.info.contact\n      };\n    }\n\n    if (source.info.license) {\n      info.license = {\n        name: source.info.license,\n        url: source.info.licenseUrl\n      };\n    }\n\n    if (source.info.termsOfServiceUrl) {\n      info.termsOfService = source.info.termsOfServiceUrl;\n    }\n  }\n\n  return info;\n}\n\n/*\n * Assigns host, basePath and schemes for Swagger 2.0 result document from\n * Swagger 1.2 basePath.\n * @param basePath {string} - the base path from Swagger 1.2\n * @param result {object} - Swagger 2.0 document\n*/\nfunction assignPathComponents(basePath, result) {\n  var url = urlParse(basePath);\n  result.host = url.host;\n  result.basePath = url.path;\n  if (url.protocol) {\n    result.schemes = [url.protocol.substr(0, url.protocol.length - 1)];\n  }\n}\n\n/*\n * Process a data type object.\n *\n * @see {@link https://github.com/swagger-api/swagger-spec/blob/master/versions/\n *  1.2.md#433-data-type-fields}\n *\n * @param field {object} - A data type field\n *\n * @returns {object} - Swagger 2.0 equivalent\n */\nfunction processDataType(field, fixRef) {\n  field = clone(field);\n\n  // Checking for the existence of '#/definitions/' is related to this bug:\n  //   https://github.com/apigee-127/swagger-converter/issues/6\n  if (field.$ref && field.$ref.indexOf('#/definitions/') === -1) {\n    field.$ref = '#/definitions/' + field.$ref;\n  } else if (field.items && field.items.$ref &&\n             field.items.$ref.indexOf('#/definitions/') === -1) {\n    field.items.$ref = '#/definitions/' + field.items.$ref;\n  }\n\n  if (fixRef) {\n    if (field.type && primitiveTypes.indexOf(field.type) === -1) {\n      field = {$ref: '#/definitions/' + field.type};\n    }\n  }\n\n  if (field.minimum) {\n    field.minimum = fixNonStringValue(field.minimum);\n  }\n\n  if (field.maximum) {\n    field.maximum = fixNonStringValue(field.maximum);\n  }\n\n  if (field.defaultValue) {\n    field.default = field.defaultValue;\n    delete field.defaultValue;\n    if (field.type && field.type !== 'string') {\n      field.default = fixNonStringValue(field.default);\n    }\n  }\n\n  return field;\n}\n\n/*\n * Builds a Swagger 2.0 path object form a Swagger 1.2 path object\n * @param api {object} - Swagger 1.2 path object\n * @param apiDeclaration {object} - parent apiDeclaration\n * @returns {object} - Swagger 2.0 path object\n*/\nfunction buildPath(api, apiDeclaration) {\n  var path = {};\n\n  api.operations.forEach(function(oldOperation) {\n    var method = oldOperation.method.toLowerCase();\n    path[method] = buildOperation(oldOperation, apiDeclaration.produces,\n      apiDeclaration.consumes, apiDeclaration.resourcePath);\n  });\n\n  return path;\n}\n\n/*\n * Builds a Swagger 2.0 operation object form a Swagger 1.2 operation object\n * @param oldOperation {object} - Swagger 1.2 operation object\n * @param produces {array} - from containing apiDeclaration\n * @param consumes {array} - from containing apiDeclaration\n * @returns {object} - Swagger 2.0 operation object\n*/\nfunction buildOperation(oldOperation, produces, consumes, resourcePath) {\n  var operation = {\n    responses: {},\n    description: oldOperation.description || ''\n  };\n\n  if (resourcePath) {\n    operation.tags = [];\n    operation.tags.push(resourcePath.substr(1));\n  }\n\n  if (oldOperation.summary) {\n    operation.summary = oldOperation.summary;\n  }\n\n  if (oldOperation.nickname) {\n    operation.operationId = oldOperation.nickname;\n  }\n\n  if (produces) { operation.produces = produces; }\n  if (consumes) { operation.consumes = consumes; }\n\n  if (Array.isArray(oldOperation.parameters) &&\n      oldOperation.parameters.length) {\n    operation.parameters = oldOperation.parameters.map(function(parameter) {\n      return buildParameter(parameter);\n    });\n  }\n\n  if (Array.isArray(oldOperation.responseMessages)) {\n    oldOperation.responseMessages.forEach(function(oldResponse) {\n      operation.responses[oldResponse.code] = buildResponse(oldResponse);\n    });\n  }\n\n  if (!Object.keys(operation.responses).length ||\n    (!operation.responses[200] && oldOperation.type)) {\n    operation.responses[200] = {\n      description: 'No response was specified'\n    };\n  }\n\n  if (oldOperation.type && oldOperation.type !== 'void') {\n    var schema = buildParamType(oldOperation);\n    if (primitiveTypes.indexOf(oldOperation.type) === -1) {\n      schema = {\n        '$ref': '#/definitions/' + oldOperation.type\n      };\n    }\n    operation.responses['200'].schema = schema;\n  }\n\n  return operation;\n}\n\n/*\n * Builds a Swagger 2.0 response object form a Swagger 1.2 response object\n * @param oldResponse {object} - Swagger 1.2 response object\n * @returns {object} - Swagger 2.0 response object\n*/\nfunction buildResponse(oldResponse) {\n  var response = {};\n\n  // TODO: Confirm this is correct\n  response.description = oldResponse.message;\n\n  return response;\n}\n\n/*\n * Converts Swagger 1.2 parameter object to Swagger 2.0 parameter object\n * @param oldParameter {object} - Swagger 1.2 parameter object\n * @returns {object} - Swagger 2.0 parameter object\n*/\nfunction buildParameter(oldParameter) {\n  var parameter = {\n    in: oldParameter.paramType,\n    description: oldParameter.description,\n    name: oldParameter.name,\n    required: !!oldParameter.required\n  };\n\n  if (primitiveTypes.indexOf(oldParameter.type) === -1) {\n    parameter.schema = {$ref: '#/definitions/' + oldParameter.type};\n  } else if (oldParameter.paramType === 'body') {\n    parameter.schema = buildParamType(oldParameter);\n  } else {\n    extend(parameter, buildParamType(oldParameter));\n  }\n\n  // form was changed to formData in Swagger 2.0\n  if (parameter.in === 'form') {\n    parameter.in = 'formData';\n  }\n\n  return parameter;\n}\n\n/*\n * Converts Swagger 1.2 type fields from parameter object into their Swagger 2.0 conterparts\n * @param oldParameter {object} - Swagger 1.2 parameter object\n * @returns {object} - Swagger 2.0 type fields from parameter object\n*/\nfunction buildParamType(oldParameter) {\n  var paramType = {};\n  var copyProperties = [\n    'default',\n    'maximum',\n    'minimum',\n    'items'\n  ];\n\n  oldParameter = processDataType(oldParameter, false);\n\n  paramType.type = oldParameter.type.toLowerCase();\n\n  copyProperties.forEach(function(name) {\n    if (typeof oldParameter[name] !== 'undefined') {\n      paramType[name] = oldParameter[name];\n    }\n  });\n\n  if (typeof oldParameter.defaultValue !== 'undefined') {\n    paramType.default = oldParameter.defaultValue;\n  }\n\n  return paramType;\n}\n\n/*\n * Convertes Swagger 1.2 authorization definitions to Swagger 2.0 security\n *   definitions\n *\n * @param resourceListing {object} - The Swagger 1.2 Resource Listing document\n * @param convertedSecurityNames {object} - A list of original Swagger 1.2\n * authorization names and the new Swagger 2.0\n *  security names associated with it (This is required because Swagger 2.0 only\n *  supports one oauth2 flow per security definition but in Swagger 1.2 you\n *  could describe two (implicit and authorization_code).  To support this, we\n *  will create a per-flow version of each oauth2 definition, where necessary,\n *  and keep track of the new names so that when we handle security references\n *  we reference things properly.)\n *\n * @returns {object} - Swagger 2.0 security definitions\n */\nfunction buildSecurityDefinitions(resourceListing, convertedSecurityNames) {\n  var securityDefinitions = {};\n\n  Object.keys(resourceListing.authorizations).forEach(function(name) {\n    var authorization = resourceListing.authorizations[name];\n    var createDefinition = function createDefinition(oName) {\n      var securityDefinition = securityDefinitions[oName || name] = {\n        type: authorization.type\n      };\n\n      if (authorization.passAs) {\n        securityDefinition.in = authorization.passAs;\n      }\n\n      if (authorization.keyname) {\n        securityDefinition.name = authorization.keyname;\n      }\n\n      return securityDefinition;\n    };\n\n    // For oauth2 types, 1.2 describes multiple \"flows\" in one auth and for 2.0,\n    // that is not an option so we need to\n    // create one security definition per flow and keep track of this mapping.\n    if (authorization.grantTypes) {\n      convertedSecurityNames[name] = [];\n\n      Object.keys(authorization.grantTypes).forEach(function(gtName) {\n        var grantType = authorization.grantTypes[gtName];\n        var oName = name + '_' + gtName;\n        var securityDefinition = createDefinition(oName);\n\n        convertedSecurityNames[name].push(oName);\n\n        if (gtName === 'implicit') {\n          securityDefinition.flow = 'implicit';\n        } else {\n          securityDefinition.flow = 'accessCode';\n        }\n\n        switch (gtName) {\n        case 'implicit':\n          securityDefinition.authorizationUrl = grantType.loginEndpoint.url;\n          break;\n\n        case 'authorization_code':\n          securityDefinition.authorizationUrl =\n            grantType.tokenRequestEndpoint.url;\n          securityDefinition.tokenUrl = grantType.tokenEndpoint.url;\n          break;\n        }\n\n        if (authorization.scopes) {\n          securityDefinition.scopes = {};\n\n          authorization.scopes.forEach(function(scope) {\n            securityDefinition.scopes[scope.scope] = scope.description ||\n              ('Undescribed ' + scope.scope);\n          });\n        }\n      });\n    } else {\n      createDefinition();\n    }\n  });\n\n  return securityDefinitions;\n}\n\n/*\n * Transforms a Swagger 1.2 model object to a Swagger 2.0 model object\n * @param model {object} - (mutable) Swagger 1.2 model object\n*/\nfunction transformModel(model) {\n  if (typeof model.properties === 'object') {\n    Object.keys(model.properties).forEach(function(propertieName) {\n      model.properties[propertieName] =\n        processDataType(model.properties[propertieName], true);\n    });\n  }\n}\n\n/*\n * Transfers the \"models\" object of Swagger 1.2 specs to Swagger 2.0 definitions\n * object\n * @param models {object} - (mutable) an object containing Swagger 1.2 objects\n * @returns {object} - transformed modles object\n*/\nfunction transformAllModels(models) {\n  var modelsClone = clone(models);\n\n  if (typeof models !== 'object') {\n    throw new Error('models must be object');\n  }\n\n  var hierarchy = {};\n\n  Object.keys(modelsClone).forEach(function(modelId) {\n    var model = modelsClone[modelId];\n    delete model['id'];\n\n    transformModel(model);\n\n    if (model.subTypes) {\n      hierarchy[modelId] = model.subTypes;\n\n      delete model.subTypes;\n    }\n  });\n\n  Object.keys(hierarchy).forEach(function(parent) {\n    hierarchy[parent].forEach(function(childId) {\n      var childModel = modelsClone[childId];\n\n      if (childModel) {\n        var allOf = (childModel.allOf || []).concat({\n          $ref: '#/definitions/' + parent\n        }).concat(clone(childModel));\n        for (var member in childModel) {\n          delete childModel[member];\n        }\n        childModel.allOf = allOf;\n      }\n    });\n  });\n\n  return modelsClone;\n}\n\n/*\n * Extends an object with another\n * @param source {object} - object that will get extended\n * @parma destination {object} - object the will used to extend source\n*/\nfunction extend(source, destination) {\n  if (typeof source !== 'object') {\n    throw new Error('source must be objects');\n  }\n\n  if (typeof destination === 'object') {\n    Object.keys(destination).forEach(function(key) {\n      source[key] = destination[key];\n    });\n  }\n}\n\n/*\n * Convert string values into the proper type.\n * @param value {*} - value to convert\n * @returns {*} - transformed modles object\n*/\nfunction fixNonStringValue(value) {\n  if (typeof value !== 'string') {\n    return value;\n  }\n\n  try {\n    return JSON.parse(value);\n  } catch (e) {\n    throw Error('incorect property value: ' + e.message);\n  }\n}\n","var traverse = module.exports = function (obj) {\n    return new Traverse(obj);\n};\n\nfunction Traverse (obj) {\n    this.value = obj;\n}\n\nTraverse.prototype.get = function (ps) {\n    var node = this.value;\n    for (var i = 0; i < ps.length; i ++) {\n        var key = ps[i];\n        if (!node || !hasOwnProperty.call(node, key)) {\n            node = undefined;\n            break;\n        }\n        node = node[key];\n    }\n    return node;\n};\n\nTraverse.prototype.has = function (ps) {\n    var node = this.value;\n    for (var i = 0; i < ps.length; i ++) {\n        var key = ps[i];\n        if (!node || !hasOwnProperty.call(node, key)) {\n            return false;\n        }\n        node = node[key];\n    }\n    return true;\n};\n\nTraverse.prototype.set = function (ps, value) {\n    var node = this.value;\n    for (var i = 0; i < ps.length - 1; i ++) {\n        var key = ps[i];\n        if (!hasOwnProperty.call(node, key)) node[key] = {};\n        node = node[key];\n    }\n    node[ps[i]] = value;\n    return value;\n};\n\nTraverse.prototype.map = function (cb) {\n    return walk(this.value, cb, true);\n};\n\nTraverse.prototype.forEach = function (cb) {\n    this.value = walk(this.value, cb, false);\n    return this.value;\n};\n\nTraverse.prototype.reduce = function (cb, init) {\n    var skip = arguments.length === 1;\n    var acc = skip ? this.value : init;\n    this.forEach(function (x) {\n        if (!this.isRoot || !skip) {\n            acc = cb.call(this, acc, x);\n        }\n    });\n    return acc;\n};\n\nTraverse.prototype.paths = function () {\n    var acc = [];\n    this.forEach(function (x) {\n        acc.push(this.path); \n    });\n    return acc;\n};\n\nTraverse.prototype.nodes = function () {\n    var acc = [];\n    this.forEach(function (x) {\n        acc.push(this.node);\n    });\n    return acc;\n};\n\nTraverse.prototype.clone = function () {\n    var parents = [], nodes = [];\n    \n    return (function clone (src) {\n        for (var i = 0; i < parents.length; i++) {\n            if (parents[i] === src) {\n                return nodes[i];\n            }\n        }\n        \n        if (typeof src === 'object' && src !== null) {\n            var dst = copy(src);\n            \n            parents.push(src);\n            nodes.push(dst);\n            \n            forEach(objectKeys(src), function (key) {\n                dst[key] = clone(src[key]);\n            });\n            \n            parents.pop();\n            nodes.pop();\n            return dst;\n        }\n        else {\n            return src;\n        }\n    })(this.value);\n};\n\nfunction walk (root, cb, immutable) {\n    var path = [];\n    var parents = [];\n    var alive = true;\n    \n    return (function walker (node_) {\n        var node = immutable ? copy(node_) : node_;\n        var modifiers = {};\n        \n        var keepGoing = true;\n        \n        var state = {\n            node : node,\n            node_ : node_,\n            path : [].concat(path),\n            parent : parents[parents.length - 1],\n            parents : parents,\n            key : path.slice(-1)[0],\n            isRoot : path.length === 0,\n            level : path.length,\n            circular : null,\n            update : function (x, stopHere) {\n                if (!state.isRoot) {\n                    state.parent.node[state.key] = x;\n                }\n                state.node = x;\n                if (stopHere) keepGoing = false;\n            },\n            'delete' : function (stopHere) {\n                delete state.parent.node[state.key];\n                if (stopHere) keepGoing = false;\n            },\n            remove : function (stopHere) {\n                if (isArray(state.parent.node)) {\n                    state.parent.node.splice(state.key, 1);\n                }\n                else {\n                    delete state.parent.node[state.key];\n                }\n                if (stopHere) keepGoing = false;\n            },\n            keys : null,\n            before : function (f) { modifiers.before = f },\n            after : function (f) { modifiers.after = f },\n            pre : function (f) { modifiers.pre = f },\n            post : function (f) { modifiers.post = f },\n            stop : function () { alive = false },\n            block : function () { keepGoing = false }\n        };\n        \n        if (!alive) return state;\n        \n        function updateState() {\n            if (typeof state.node === 'object' && state.node !== null) {\n                if (!state.keys || state.node_ !== state.node) {\n                    state.keys = objectKeys(state.node)\n                }\n                \n                state.isLeaf = state.keys.length == 0;\n                \n                for (var i = 0; i < parents.length; i++) {\n                    if (parents[i].node_ === node_) {\n                        state.circular = parents[i];\n                        break;\n                    }\n                }\n            }\n            else {\n                state.isLeaf = true;\n                state.keys = null;\n            }\n            \n            state.notLeaf = !state.isLeaf;\n            state.notRoot = !state.isRoot;\n        }\n        \n        updateState();\n        \n        // use return values to update if defined\n        var ret = cb.call(state, state.node);\n        if (ret !== undefined && state.update) state.update(ret);\n        \n        if (modifiers.before) modifiers.before.call(state, state.node);\n        \n        if (!keepGoing) return state;\n        \n        if (typeof state.node == 'object'\n        && state.node !== null && !state.circular) {\n            parents.push(state);\n            \n            updateState();\n            \n            forEach(state.keys, function (key, i) {\n                path.push(key);\n                \n                if (modifiers.pre) modifiers.pre.call(state, state.node[key], key);\n                \n                var child = walker(state.node[key]);\n                if (immutable && hasOwnProperty.call(state.node, key)) {\n                    state.node[key] = child.node;\n                }\n                \n                child.isLast = i == state.keys.length - 1;\n                child.isFirst = i == 0;\n                \n                if (modifiers.post) modifiers.post.call(state, child);\n                \n                path.pop();\n            });\n            parents.pop();\n        }\n        \n        if (modifiers.after) modifiers.after.call(state, state.node);\n        \n        return state;\n    })(root).node;\n}\n\nfunction copy (src) {\n    if (typeof src === 'object' && src !== null) {\n        var dst;\n        \n        if (isArray(src)) {\n            dst = [];\n        }\n        else if (isDate(src)) {\n            dst = new Date(src.getTime ? src.getTime() : src);\n        }\n        else if (isRegExp(src)) {\n            dst = new RegExp(src);\n        }\n        else if (isError(src)) {\n            dst = { message: src.message };\n        }\n        else if (isBoolean(src)) {\n            dst = new Boolean(src);\n        }\n        else if (isNumber(src)) {\n            dst = new Number(src);\n        }\n        else if (isString(src)) {\n            dst = new String(src);\n        }\n        else if (Object.create && Object.getPrototypeOf) {\n            dst = Object.create(Object.getPrototypeOf(src));\n        }\n        else if (src.constructor === Object) {\n            dst = {};\n        }\n        else {\n            var proto =\n                (src.constructor && src.constructor.prototype)\n                || src.__proto__\n                || {}\n            ;\n            var T = function () {};\n            T.prototype = proto;\n            dst = new T;\n        }\n        \n        forEach(objectKeys(src), function (key) {\n            dst[key] = src[key];\n        });\n        return dst;\n    }\n    else return src;\n}\n\nvar objectKeys = Object.keys || function keys (obj) {\n    var res = [];\n    for (var key in obj) res.push(key)\n    return res;\n};\n\nfunction toS (obj) { return Object.prototype.toString.call(obj) }\nfunction isDate (obj) { return toS(obj) === '[object Date]' }\nfunction isRegExp (obj) { return toS(obj) === '[object RegExp]' }\nfunction isError (obj) { return toS(obj) === '[object Error]' }\nfunction isBoolean (obj) { return toS(obj) === '[object Boolean]' }\nfunction isNumber (obj) { return toS(obj) === '[object Number]' }\nfunction isString (obj) { return toS(obj) === '[object String]' }\n\nvar isArray = Array.isArray || function isArray (xs) {\n    return Object.prototype.toString.call(xs) === '[object Array]';\n};\n\nvar forEach = function (xs, fn) {\n    if (xs.forEach) return xs.forEach(fn)\n    else for (var i = 0; i < xs.length; i++) {\n        fn(xs[i], i, xs);\n    }\n};\n\nforEach(objectKeys(Traverse.prototype), function (key) {\n    traverse[key] = function (obj) {\n        var args = [].slice.call(arguments, 1);\n        var t = new Traverse(obj);\n        return t[key].apply(t, args);\n    };\n});\n\nvar hasOwnProperty = Object.hasOwnProperty || function (obj, key) {\n    return key in obj;\n};\n","/** @license URI.js v3.0.1 (c) 2011 Gary Court. License: http://github.com/garycourt/uri-js */\n(function (global, factory) {\n\ttypeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n\ttypeof define === 'function' && define.amd ? define(['exports'], factory) :\n\t(factory((global.URI = global.URI || {})));\n}(this, (function (exports) { 'use strict';\n\nfunction merge() {\n    for (var _len = arguments.length, sets = Array(_len), _key = 0; _key < _len; _key++) {\n        sets[_key] = arguments[_key];\n    }\n\n    if (sets.length > 1) {\n        sets[0] = sets[0].slice(0, -1);\n        var xl = sets.length - 1;\n        for (var x = 1; x < xl; ++x) {\n            sets[x] = sets[x].slice(1, -1);\n        }\n        sets[xl] = sets[xl].slice(1);\n        return sets.join('');\n    } else {\n        return sets[0];\n    }\n}\nfunction subexp(str) {\n    return \"(?:\" + str + \")\";\n}\nfunction typeOf(o) {\n    return o === undefined ? \"undefined\" : o === null ? \"null\" : Object.prototype.toString.call(o).split(\" \").pop().split(\"]\").shift().toLowerCase();\n}\nfunction toUpperCase(str) {\n    return str.toUpperCase();\n}\nfunction toArray(obj) {\n    return obj !== undefined && obj !== null ? obj instanceof Array ? obj : typeof obj.length !== \"number\" || obj.split || obj.setInterval || obj.call ? [obj] : Array.prototype.slice.call(obj) : [];\n}\n\nfunction buildExps(isIRI) {\n    var ALPHA$$ = \"[A-Za-z]\",\n        CR$ = \"[\\\\x0D]\",\n        DIGIT$$ = \"[0-9]\",\n        DQUOTE$$ = \"[\\\\x22]\",\n        HEXDIG$$ = merge(DIGIT$$, \"[A-Fa-f]\"),\n        //case-insensitive\n    LF$$ = \"[\\\\x0A]\",\n        SP$$ = \"[\\\\x20]\",\n        PCT_ENCODED$ = subexp(subexp(\"%[EFef]\" + HEXDIG$$ + \"%\" + HEXDIG$$ + HEXDIG$$ + \"%\" + HEXDIG$$ + HEXDIG$$) + \"|\" + subexp(\"%[89A-Fa-f]\" + HEXDIG$$ + \"%\" + HEXDIG$$ + HEXDIG$$) + \"|\" + subexp(\"%\" + HEXDIG$$ + HEXDIG$$)),\n        //expanded\n    GEN_DELIMS$$ = \"[\\\\:\\\\/\\\\?\\\\#\\\\[\\\\]\\\\@]\",\n        SUB_DELIMS$$ = \"[\\\\!\\\\$\\\\&\\\\'\\\\(\\\\)\\\\*\\\\+\\\\,\\\\;\\\\=]\",\n        RESERVED$$ = merge(GEN_DELIMS$$, SUB_DELIMS$$),\n        UCSCHAR$$ = isIRI ? \"[\\\\xA0-\\\\u200D\\\\u2010-\\\\u2029\\\\u202F-\\\\uD7FF\\\\uF900-\\\\uFDCF\\\\uFDF0-\\\\uFFEF]\" : \"[]\",\n        //subset, excludes bidi control characters\n    IPRIVATE$$ = isIRI ? \"[\\\\uE000-\\\\uF8FF]\" : \"[]\",\n        //subset\n    UNRESERVED$$ = merge(ALPHA$$, DIGIT$$, \"[\\\\-\\\\.\\\\_\\\\~]\", UCSCHAR$$),\n        SCHEME$ = subexp(ALPHA$$ + merge(ALPHA$$, DIGIT$$, \"[\\\\+\\\\-\\\\.]\") + \"*\"),\n        USERINFO$ = subexp(subexp(PCT_ENCODED$ + \"|\" + merge(UNRESERVED$$, SUB_DELIMS$$, \"[\\\\:]\")) + \"*\"),\n        DEC_OCTET$ = subexp(subexp(\"25[0-5]\") + \"|\" + subexp(\"2[0-4]\" + DIGIT$$) + \"|\" + subexp(\"1\" + DIGIT$$ + DIGIT$$) + \"|\" + subexp(\"[1-9]\" + DIGIT$$) + \"|\" + DIGIT$$),\n        IPV4ADDRESS$ = subexp(DEC_OCTET$ + \"\\\\.\" + DEC_OCTET$ + \"\\\\.\" + DEC_OCTET$ + \"\\\\.\" + DEC_OCTET$),\n        H16$ = subexp(HEXDIG$$ + \"{1,4}\"),\n        LS32$ = subexp(subexp(H16$ + \"\\\\:\" + H16$) + \"|\" + IPV4ADDRESS$),\n        IPV6ADDRESS1$ = subexp(subexp(H16$ + \"\\\\:\") + \"{6}\" + LS32$),\n        //                           6( h16 \":\" ) ls32\n    IPV6ADDRESS2$ = subexp(\"\\\\:\\\\:\" + subexp(H16$ + \"\\\\:\") + \"{5}\" + LS32$),\n        //                      \"::\" 5( h16 \":\" ) ls32\n    IPV6ADDRESS3$ = subexp(subexp(H16$) + \"?\\\\:\\\\:\" + subexp(H16$ + \"\\\\:\") + \"{4}\" + LS32$),\n        //[               h16 ] \"::\" 4( h16 \":\" ) ls32\n    IPV6ADDRESS4$ = subexp(subexp(subexp(H16$ + \"\\\\:\") + \"{0,1}\" + H16$) + \"?\\\\:\\\\:\" + subexp(H16$ + \"\\\\:\") + \"{3}\" + LS32$),\n        //[ *1( h16 \":\" ) h16 ] \"::\" 3( h16 \":\" ) ls32\n    IPV6ADDRESS5$ = subexp(subexp(subexp(H16$ + \"\\\\:\") + \"{0,2}\" + H16$) + \"?\\\\:\\\\:\" + subexp(H16$ + \"\\\\:\") + \"{2}\" + LS32$),\n        //[ *2( h16 \":\" ) h16 ] \"::\" 2( h16 \":\" ) ls32\n    IPV6ADDRESS6$ = subexp(subexp(subexp(H16$ + \"\\\\:\") + \"{0,3}\" + H16$) + \"?\\\\:\\\\:\" + H16$ + \"\\\\:\" + LS32$),\n        //[ *3( h16 \":\" ) h16 ] \"::\"    h16 \":\"   ls32\n    IPV6ADDRESS7$ = subexp(subexp(subexp(H16$ + \"\\\\:\") + \"{0,4}\" + H16$) + \"?\\\\:\\\\:\" + LS32$),\n        //[ *4( h16 \":\" ) h16 ] \"::\"              ls32\n    IPV6ADDRESS8$ = subexp(subexp(subexp(H16$ + \"\\\\:\") + \"{0,5}\" + H16$) + \"?\\\\:\\\\:\" + H16$),\n        //[ *5( h16 \":\" ) h16 ] \"::\"              h16\n    IPV6ADDRESS9$ = subexp(subexp(subexp(H16$ + \"\\\\:\") + \"{0,6}\" + H16$) + \"?\\\\:\\\\:\"),\n        //[ *6( h16 \":\" ) h16 ] \"::\"\n    IPV6ADDRESS$ = subexp([IPV6ADDRESS1$, IPV6ADDRESS2$, IPV6ADDRESS3$, IPV6ADDRESS4$, IPV6ADDRESS5$, IPV6ADDRESS6$, IPV6ADDRESS7$, IPV6ADDRESS8$, IPV6ADDRESS9$].join(\"|\")),\n        IPVFUTURE$ = subexp(\"[vV]\" + HEXDIG$$ + \"+\\\\.\" + merge(UNRESERVED$$, SUB_DELIMS$$, \"[\\\\:]\") + \"+\"),\n        IP_LITERAL$ = subexp(\"\\\\[\" + subexp(IPV6ADDRESS$ + \"|\" + IPVFUTURE$) + \"\\\\]\"),\n        REG_NAME$ = subexp(subexp(PCT_ENCODED$ + \"|\" + merge(UNRESERVED$$, SUB_DELIMS$$)) + \"*\"),\n        HOST$ = subexp(IP_LITERAL$ + \"|\" + IPV4ADDRESS$ + \"(?!\" + REG_NAME$ + \")\" + \"|\" + REG_NAME$),\n        PORT$ = subexp(DIGIT$$ + \"*\"),\n        AUTHORITY$ = subexp(subexp(USERINFO$ + \"@\") + \"?\" + HOST$ + subexp(\"\\\\:\" + PORT$) + \"?\"),\n        PCHAR$ = subexp(PCT_ENCODED$ + \"|\" + merge(UNRESERVED$$, SUB_DELIMS$$, \"[\\\\:\\\\@]\")),\n        SEGMENT$ = subexp(PCHAR$ + \"*\"),\n        SEGMENT_NZ$ = subexp(PCHAR$ + \"+\"),\n        SEGMENT_NZ_NC$ = subexp(subexp(PCT_ENCODED$ + \"|\" + merge(UNRESERVED$$, SUB_DELIMS$$, \"[\\\\@]\")) + \"+\"),\n        PATH_ABEMPTY$ = subexp(subexp(\"\\\\/\" + SEGMENT$) + \"*\"),\n        PATH_ABSOLUTE$ = subexp(\"\\\\/\" + subexp(SEGMENT_NZ$ + PATH_ABEMPTY$) + \"?\"),\n        //simplified\n    PATH_NOSCHEME$ = subexp(SEGMENT_NZ_NC$ + PATH_ABEMPTY$),\n        //simplified\n    PATH_ROOTLESS$ = subexp(SEGMENT_NZ$ + PATH_ABEMPTY$),\n        //simplified\n    PATH_EMPTY$ = \"(?!\" + PCHAR$ + \")\",\n        PATH$ = subexp(PATH_ABEMPTY$ + \"|\" + PATH_ABSOLUTE$ + \"|\" + PATH_NOSCHEME$ + \"|\" + PATH_ROOTLESS$ + \"|\" + PATH_EMPTY$),\n        QUERY$ = subexp(subexp(PCHAR$ + \"|\" + merge(\"[\\\\/\\\\?]\", IPRIVATE$$)) + \"*\"),\n        FRAGMENT$ = subexp(subexp(PCHAR$ + \"|[\\\\/\\\\?]\") + \"*\"),\n        HIER_PART$ = subexp(subexp(\"\\\\/\\\\/\" + AUTHORITY$ + PATH_ABEMPTY$) + \"|\" + PATH_ABSOLUTE$ + \"|\" + PATH_ROOTLESS$ + \"|\" + PATH_EMPTY$),\n        URI$ = subexp(SCHEME$ + \"\\\\:\" + HIER_PART$ + subexp(\"\\\\?\" + QUERY$) + \"?\" + subexp(\"\\\\#\" + FRAGMENT$) + \"?\"),\n        RELATIVE_PART$ = subexp(subexp(\"\\\\/\\\\/\" + AUTHORITY$ + PATH_ABEMPTY$) + \"|\" + PATH_ABSOLUTE$ + \"|\" + PATH_NOSCHEME$ + \"|\" + PATH_EMPTY$),\n        RELATIVE$ = subexp(RELATIVE_PART$ + subexp(\"\\\\?\" + QUERY$) + \"?\" + subexp(\"\\\\#\" + FRAGMENT$) + \"?\"),\n        URI_REFERENCE$ = subexp(URI$ + \"|\" + RELATIVE$),\n        ABSOLUTE_URI$ = subexp(SCHEME$ + \"\\\\:\" + HIER_PART$ + subexp(\"\\\\?\" + QUERY$) + \"?\"),\n        GENERIC_REF$ = \"^(\" + SCHEME$ + \")\\\\:\" + subexp(subexp(\"\\\\/\\\\/(\" + subexp(\"(\" + USERINFO$ + \")@\") + \"?(\" + HOST$ + \")\" + subexp(\"\\\\:(\" + PORT$ + \")\") + \"?)\") + \"?(\" + PATH_ABEMPTY$ + \"|\" + PATH_ABSOLUTE$ + \"|\" + PATH_ROOTLESS$ + \"|\" + PATH_EMPTY$ + \")\") + subexp(\"\\\\?(\" + QUERY$ + \")\") + \"?\" + subexp(\"\\\\#(\" + FRAGMENT$ + \")\") + \"?$\",\n        RELATIVE_REF$ = \"^(){0}\" + subexp(subexp(\"\\\\/\\\\/(\" + subexp(\"(\" + USERINFO$ + \")@\") + \"?(\" + HOST$ + \")\" + subexp(\"\\\\:(\" + PORT$ + \")\") + \"?)\") + \"?(\" + PATH_ABEMPTY$ + \"|\" + PATH_ABSOLUTE$ + \"|\" + PATH_NOSCHEME$ + \"|\" + PATH_EMPTY$ + \")\") + subexp(\"\\\\?(\" + QUERY$ + \")\") + \"?\" + subexp(\"\\\\#(\" + FRAGMENT$ + \")\") + \"?$\",\n        ABSOLUTE_REF$ = \"^(\" + SCHEME$ + \")\\\\:\" + subexp(subexp(\"\\\\/\\\\/(\" + subexp(\"(\" + USERINFO$ + \")@\") + \"?(\" + HOST$ + \")\" + subexp(\"\\\\:(\" + PORT$ + \")\") + \"?)\") + \"?(\" + PATH_ABEMPTY$ + \"|\" + PATH_ABSOLUTE$ + \"|\" + PATH_ROOTLESS$ + \"|\" + PATH_EMPTY$ + \")\") + subexp(\"\\\\?(\" + QUERY$ + \")\") + \"?$\",\n        SAMEDOC_REF$ = \"^\" + subexp(\"\\\\#(\" + FRAGMENT$ + \")\") + \"?$\",\n        AUTHORITY_REF$ = \"^\" + subexp(\"(\" + USERINFO$ + \")@\") + \"?(\" + HOST$ + \")\" + subexp(\"\\\\:(\" + PORT$ + \")\") + \"?$\";\n    return {\n        NOT_SCHEME: new RegExp(merge(\"[^]\", ALPHA$$, DIGIT$$, \"[\\\\+\\\\-\\\\.]\"), \"g\"),\n        NOT_USERINFO: new RegExp(merge(\"[^\\\\%\\\\:]\", UNRESERVED$$, SUB_DELIMS$$), \"g\"),\n        NOT_HOST: new RegExp(merge(\"[^\\\\%\\\\[\\\\]\\\\:]\", UNRESERVED$$, SUB_DELIMS$$), \"g\"),\n        NOT_PATH: new RegExp(merge(\"[^\\\\%\\\\/\\\\:\\\\@]\", UNRESERVED$$, SUB_DELIMS$$), \"g\"),\n        NOT_PATH_NOSCHEME: new RegExp(merge(\"[^\\\\%\\\\/\\\\@]\", UNRESERVED$$, SUB_DELIMS$$), \"g\"),\n        NOT_QUERY: new RegExp(merge(\"[^\\\\%]\", UNRESERVED$$, SUB_DELIMS$$, \"[\\\\:\\\\@\\\\/\\\\?]\", IPRIVATE$$), \"g\"),\n        NOT_FRAGMENT: new RegExp(merge(\"[^\\\\%]\", UNRESERVED$$, SUB_DELIMS$$, \"[\\\\:\\\\@\\\\/\\\\?]\"), \"g\"),\n        ESCAPE: new RegExp(merge(\"[^]\", UNRESERVED$$, SUB_DELIMS$$), \"g\"),\n        UNRESERVED: new RegExp(UNRESERVED$$, \"g\"),\n        OTHER_CHARS: new RegExp(merge(\"[^\\\\%]\", UNRESERVED$$, RESERVED$$), \"g\"),\n        PCT_ENCODED: new RegExp(PCT_ENCODED$, \"g\"),\n        IPV6ADDRESS: new RegExp(\"\\\\[?(\" + IPV6ADDRESS$ + \")\\\\]?\", \"g\")\n    };\n}\nvar URI_PROTOCOL = buildExps(false);\n\nvar IRI_PROTOCOL = buildExps(true);\n\nvar toConsumableArray = function (arr) {\n  if (Array.isArray(arr)) {\n    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];\n\n    return arr2;\n  } else {\n    return Array.from(arr);\n  }\n};\n\n/** Highest positive signed 32-bit float value */\n\nvar maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1\n\n/** Bootstring parameters */\nvar base = 36;\nvar tMin = 1;\nvar tMax = 26;\nvar skew = 38;\nvar damp = 700;\nvar initialBias = 72;\nvar initialN = 128; // 0x80\nvar delimiter = '-'; // '\\x2D'\n\n/** Regular expressions */\nvar regexPunycode = /^xn--/;\nvar regexNonASCII = /[^\\0-\\x7E]/; // non-ASCII chars\nvar regexSeparators = /[\\x2E\\u3002\\uFF0E\\uFF61]/g; // RFC 3490 separators\n\n/** Error messages */\nvar errors = {\n\t'overflow': 'Overflow: input needs wider integers to process',\n\t'not-basic': 'Illegal input >= 0x80 (not a basic code point)',\n\t'invalid-input': 'Invalid input'\n};\n\n/** Convenience shortcuts */\nvar baseMinusTMin = base - tMin;\nvar floor = Math.floor;\nvar stringFromCharCode = String.fromCharCode;\n\n/*--------------------------------------------------------------------------*/\n\n/**\n * A generic error utility function.\n * @private\n * @param {String} type The error type.\n * @returns {Error} Throws a `RangeError` with the applicable error message.\n */\nfunction error$1(type) {\n\tthrow new RangeError(errors[type]);\n}\n\n/**\n * A generic `Array#map` utility function.\n * @private\n * @param {Array} array The array to iterate over.\n * @param {Function} callback The function that gets called for every array\n * item.\n * @returns {Array} A new array of values returned by the callback function.\n */\nfunction map(array, fn) {\n\tvar result = [];\n\tvar length = array.length;\n\twhile (length--) {\n\t\tresult[length] = fn(array[length]);\n\t}\n\treturn result;\n}\n\n/**\n * A simple `Array#map`-like wrapper to work with domain name strings or email\n * addresses.\n * @private\n * @param {String} domain The domain name or email address.\n * @param {Function} callback The function that gets called for every\n * character.\n * @returns {Array} A new string of characters returned by the callback\n * function.\n */\nfunction mapDomain(string, fn) {\n\tvar parts = string.split('@');\n\tvar result = '';\n\tif (parts.length > 1) {\n\t\t// In email addresses, only the domain name should be punycoded. Leave\n\t\t// the local part (i.e. everything up to `@`) intact.\n\t\tresult = parts[0] + '@';\n\t\tstring = parts[1];\n\t}\n\t// Avoid `split(regex)` for IE8 compatibility. See #17.\n\tstring = string.replace(regexSeparators, '\\x2E');\n\tvar labels = string.split('.');\n\tvar encoded = map(labels, fn).join('.');\n\treturn result + encoded;\n}\n\n/**\n * Creates an array containing the numeric code points of each Unicode\n * character in the string. While JavaScript uses UCS-2 internally,\n * this function will convert a pair of surrogate halves (each of which\n * UCS-2 exposes as separate characters) into a single code point,\n * matching UTF-16.\n * @see `punycode.ucs2.encode`\n * @see <https://mathiasbynens.be/notes/javascript-encoding>\n * @memberOf punycode.ucs2\n * @name decode\n * @param {String} string The Unicode input string (UCS-2).\n * @returns {Array} The new array of code points.\n */\nfunction ucs2decode(string) {\n\tvar output = [];\n\tvar counter = 0;\n\tvar length = string.length;\n\twhile (counter < length) {\n\t\tvar value = string.charCodeAt(counter++);\n\t\tif (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n\t\t\t// It's a high surrogate, and there is a next character.\n\t\t\tvar extra = string.charCodeAt(counter++);\n\t\t\tif ((extra & 0xFC00) == 0xDC00) {\n\t\t\t\t// Low surrogate.\n\t\t\t\toutput.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n\t\t\t} else {\n\t\t\t\t// It's an unmatched surrogate; only append this code unit, in case the\n\t\t\t\t// next code unit is the high surrogate of a surrogate pair.\n\t\t\t\toutput.push(value);\n\t\t\t\tcounter--;\n\t\t\t}\n\t\t} else {\n\t\t\toutput.push(value);\n\t\t}\n\t}\n\treturn output;\n}\n\n/**\n * Creates a string based on an array of numeric code points.\n * @see `punycode.ucs2.decode`\n * @memberOf punycode.ucs2\n * @name encode\n * @param {Array} codePoints The array of numeric code points.\n * @returns {String} The new Unicode string (UCS-2).\n */\nvar ucs2encode = function ucs2encode(array) {\n\treturn String.fromCodePoint.apply(String, toConsumableArray(array));\n};\n\n/**\n * Converts a basic code point into a digit/integer.\n * @see `digitToBasic()`\n * @private\n * @param {Number} codePoint The basic numeric code point value.\n * @returns {Number} The numeric value of a basic code point (for use in\n * representing integers) in the range `0` to `base - 1`, or `base` if\n * the code point does not represent a value.\n */\nvar basicToDigit = function basicToDigit(codePoint) {\n\tif (codePoint - 0x30 < 0x0A) {\n\t\treturn codePoint - 0x16;\n\t}\n\tif (codePoint - 0x41 < 0x1A) {\n\t\treturn codePoint - 0x41;\n\t}\n\tif (codePoint - 0x61 < 0x1A) {\n\t\treturn codePoint - 0x61;\n\t}\n\treturn base;\n};\n\n/**\n * Converts a digit/integer into a basic code point.\n * @see `basicToDigit()`\n * @private\n * @param {Number} digit The numeric value of a basic code point.\n * @returns {Number} The basic code point whose value (when used for\n * representing integers) is `digit`, which needs to be in the range\n * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is\n * used; else, the lowercase form is used. The behavior is undefined\n * if `flag` is non-zero and `digit` has no uppercase form.\n */\nvar digitToBasic = function digitToBasic(digit, flag) {\n\t//  0..25 map to ASCII a..z or A..Z\n\t// 26..35 map to ASCII 0..9\n\treturn digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);\n};\n\n/**\n * Bias adaptation function as per section 3.4 of RFC 3492.\n * https://tools.ietf.org/html/rfc3492#section-3.4\n * @private\n */\nvar adapt = function adapt(delta, numPoints, firstTime) {\n\tvar k = 0;\n\tdelta = firstTime ? floor(delta / damp) : delta >> 1;\n\tdelta += floor(delta / numPoints);\n\tfor (; /* no initialization */delta > baseMinusTMin * tMax >> 1; k += base) {\n\t\tdelta = floor(delta / baseMinusTMin);\n\t}\n\treturn floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n};\n\n/**\n * Converts a Punycode string of ASCII-only symbols to a string of Unicode\n * symbols.\n * @memberOf punycode\n * @param {String} input The Punycode string of ASCII-only symbols.\n * @returns {String} The resulting string of Unicode symbols.\n */\nvar decode = function decode(input) {\n\t// Don't use UCS-2.\n\tvar output = [];\n\tvar inputLength = input.length;\n\tvar i = 0;\n\tvar n = initialN;\n\tvar bias = initialBias;\n\n\t// Handle the basic code points: let `basic` be the number of input code\n\t// points before the last delimiter, or `0` if there is none, then copy\n\t// the first basic code points to the output.\n\n\tvar basic = input.lastIndexOf(delimiter);\n\tif (basic < 0) {\n\t\tbasic = 0;\n\t}\n\n\tfor (var j = 0; j < basic; ++j) {\n\t\t// if it's not a basic code point\n\t\tif (input.charCodeAt(j) >= 0x80) {\n\t\t\terror$1('not-basic');\n\t\t}\n\t\toutput.push(input.charCodeAt(j));\n\t}\n\n\t// Main decoding loop: start just after the last delimiter if any basic code\n\t// points were copied; start at the beginning otherwise.\n\n\tfor (var index = basic > 0 ? basic + 1 : 0; index < inputLength;) /* no final expression */{\n\n\t\t// `index` is the index of the next character to be consumed.\n\t\t// Decode a generalized variable-length integer into `delta`,\n\t\t// which gets added to `i`. The overflow checking is easier\n\t\t// if we increase `i` as we go, then subtract off its starting\n\t\t// value at the end to obtain `delta`.\n\t\tvar oldi = i;\n\t\tfor (var w = 1, k = base;; /* no condition */k += base) {\n\n\t\t\tif (index >= inputLength) {\n\t\t\t\terror$1('invalid-input');\n\t\t\t}\n\n\t\t\tvar digit = basicToDigit(input.charCodeAt(index++));\n\n\t\t\tif (digit >= base || digit > floor((maxInt - i) / w)) {\n\t\t\t\terror$1('overflow');\n\t\t\t}\n\n\t\t\ti += digit * w;\n\t\t\tvar t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;\n\n\t\t\tif (digit < t) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tvar baseMinusT = base - t;\n\t\t\tif (w > floor(maxInt / baseMinusT)) {\n\t\t\t\terror$1('overflow');\n\t\t\t}\n\n\t\t\tw *= baseMinusT;\n\t\t}\n\n\t\tvar out = output.length + 1;\n\t\tbias = adapt(i - oldi, out, oldi == 0);\n\n\t\t// `i` was supposed to wrap around from `out` to `0`,\n\t\t// incrementing `n` each time, so we'll fix that now:\n\t\tif (floor(i / out) > maxInt - n) {\n\t\t\terror$1('overflow');\n\t\t}\n\n\t\tn += floor(i / out);\n\t\ti %= out;\n\n\t\t// Insert `n` at position `i` of the output.\n\t\toutput.splice(i++, 0, n);\n\t}\n\n\treturn String.fromCodePoint.apply(String, output);\n};\n\n/**\n * Converts a string of Unicode symbols (e.g. a domain name label) to a\n * Punycode string of ASCII-only symbols.\n * @memberOf punycode\n * @param {String} input The string of Unicode symbols.\n * @returns {String} The resulting Punycode string of ASCII-only symbols.\n */\nvar encode = function encode(input) {\n\tvar output = [];\n\n\t// Convert the input in UCS-2 to an array of Unicode code points.\n\tinput = ucs2decode(input);\n\n\t// Cache the length.\n\tvar inputLength = input.length;\n\n\t// Initialize the state.\n\tvar n = initialN;\n\tvar delta = 0;\n\tvar bias = initialBias;\n\n\t// Handle the basic code points.\n\tvar _iteratorNormalCompletion = true;\n\tvar _didIteratorError = false;\n\tvar _iteratorError = undefined;\n\n\ttry {\n\t\tfor (var _iterator = input[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n\t\t\tvar _currentValue2 = _step.value;\n\n\t\t\tif (_currentValue2 < 0x80) {\n\t\t\t\toutput.push(stringFromCharCode(_currentValue2));\n\t\t\t}\n\t\t}\n\t} catch (err) {\n\t\t_didIteratorError = true;\n\t\t_iteratorError = err;\n\t} finally {\n\t\ttry {\n\t\t\tif (!_iteratorNormalCompletion && _iterator.return) {\n\t\t\t\t_iterator.return();\n\t\t\t}\n\t\t} finally {\n\t\t\tif (_didIteratorError) {\n\t\t\t\tthrow _iteratorError;\n\t\t\t}\n\t\t}\n\t}\n\n\tvar basicLength = output.length;\n\tvar handledCPCount = basicLength;\n\n\t// `handledCPCount` is the number of code points that have been handled;\n\t// `basicLength` is the number of basic code points.\n\n\t// Finish the basic string with a delimiter unless it's empty.\n\tif (basicLength) {\n\t\toutput.push(delimiter);\n\t}\n\n\t// Main encoding loop:\n\twhile (handledCPCount < inputLength) {\n\n\t\t// All non-basic code points < n have been handled already. Find the next\n\t\t// larger one:\n\t\tvar m = maxInt;\n\t\tvar _iteratorNormalCompletion2 = true;\n\t\tvar _didIteratorError2 = false;\n\t\tvar _iteratorError2 = undefined;\n\n\t\ttry {\n\t\t\tfor (var _iterator2 = input[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {\n\t\t\t\tvar currentValue = _step2.value;\n\n\t\t\t\tif (currentValue >= n && currentValue < m) {\n\t\t\t\t\tm = currentValue;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,\n\t\t\t// but guard against overflow.\n\t\t} catch (err) {\n\t\t\t_didIteratorError2 = true;\n\t\t\t_iteratorError2 = err;\n\t\t} finally {\n\t\t\ttry {\n\t\t\t\tif (!_iteratorNormalCompletion2 && _iterator2.return) {\n\t\t\t\t\t_iterator2.return();\n\t\t\t\t}\n\t\t\t} finally {\n\t\t\t\tif (_didIteratorError2) {\n\t\t\t\t\tthrow _iteratorError2;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tvar handledCPCountPlusOne = handledCPCount + 1;\n\t\tif (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n\t\t\terror$1('overflow');\n\t\t}\n\n\t\tdelta += (m - n) * handledCPCountPlusOne;\n\t\tn = m;\n\n\t\tvar _iteratorNormalCompletion3 = true;\n\t\tvar _didIteratorError3 = false;\n\t\tvar _iteratorError3 = undefined;\n\n\t\ttry {\n\t\t\tfor (var _iterator3 = input[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {\n\t\t\t\tvar _currentValue = _step3.value;\n\n\t\t\t\tif (_currentValue < n && ++delta > maxInt) {\n\t\t\t\t\terror$1('overflow');\n\t\t\t\t}\n\t\t\t\tif (_currentValue == n) {\n\t\t\t\t\t// Represent delta as a generalized variable-length integer.\n\t\t\t\t\tvar q = delta;\n\t\t\t\t\tfor (var k = base;; /* no condition */k += base) {\n\t\t\t\t\t\tvar t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;\n\t\t\t\t\t\tif (q < t) {\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tvar qMinusT = q - t;\n\t\t\t\t\t\tvar baseMinusT = base - t;\n\t\t\t\t\t\toutput.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0)));\n\t\t\t\t\t\tq = floor(qMinusT / baseMinusT);\n\t\t\t\t\t}\n\n\t\t\t\t\toutput.push(stringFromCharCode(digitToBasic(q, 0)));\n\t\t\t\t\tbias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n\t\t\t\t\tdelta = 0;\n\t\t\t\t\t++handledCPCount;\n\t\t\t\t}\n\t\t\t}\n\t\t} catch (err) {\n\t\t\t_didIteratorError3 = true;\n\t\t\t_iteratorError3 = err;\n\t\t} finally {\n\t\t\ttry {\n\t\t\t\tif (!_iteratorNormalCompletion3 && _iterator3.return) {\n\t\t\t\t\t_iterator3.return();\n\t\t\t\t}\n\t\t\t} finally {\n\t\t\t\tif (_didIteratorError3) {\n\t\t\t\t\tthrow _iteratorError3;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t++delta;\n\t\t++n;\n\t}\n\treturn output.join('');\n};\n\n/**\n * Converts a Punycode string representing a domain name or an email address\n * to Unicode. Only the Punycoded parts of the input will be converted, i.e.\n * it doesn't matter if you call it on a string that has already been\n * converted to Unicode.\n * @memberOf punycode\n * @param {String} input The Punycoded domain name or email address to\n * convert to Unicode.\n * @returns {String} The Unicode representation of the given Punycode\n * string.\n */\nvar toUnicode = function toUnicode(input) {\n\treturn mapDomain(input, function (string) {\n\t\treturn regexPunycode.test(string) ? decode(string.slice(4).toLowerCase()) : string;\n\t});\n};\n\n/**\n * Converts a Unicode string representing a domain name or an email address to\n * Punycode. Only the non-ASCII parts of the domain name will be converted,\n * i.e. it doesn't matter if you call it with a domain that's already in\n * ASCII.\n * @memberOf punycode\n * @param {String} input The domain name or email address to convert, as a\n * Unicode string.\n * @returns {String} The Punycode representation of the given domain name or\n * email address.\n */\nvar toASCII = function toASCII(input) {\n\treturn mapDomain(input, function (string) {\n\t\treturn regexNonASCII.test(string) ? 'xn--' + encode(string) : string;\n\t});\n};\n\n/*--------------------------------------------------------------------------*/\n\n/** Define the public API */\nvar punycode = {\n\t/**\n  * A string representing the current Punycode.js version number.\n  * @memberOf punycode\n  * @type String\n  */\n\t'version': '2.1.0',\n\t/**\n  * An object of methods to convert from JavaScript's internal character\n  * representation (UCS-2) to Unicode code points, and back.\n  * @see <https://mathiasbynens.be/notes/javascript-encoding>\n  * @memberOf punycode\n  * @type Object\n  */\n\t'ucs2': {\n\t\t'decode': ucs2decode,\n\t\t'encode': ucs2encode\n\t},\n\t'decode': decode,\n\t'encode': encode,\n\t'toASCII': toASCII,\n\t'toUnicode': toUnicode\n};\n\n/**\r\n * URI.js\r\n *\r\n * @fileoverview An RFC 3986 compliant, scheme extendable URI parsing/validating/resolving library for JavaScript.\r\n * @author <a href=\"mailto:gary.court@gmail.com\">Gary Court</a>\r\n * @see http://github.com/garycourt/uri-js\r\n */\n/**\r\n * Copyright 2011 Gary Court. All rights reserved.\r\n *\r\n * Redistribution and use in source and binary forms, with or without modification, are\r\n * permitted provided that the following conditions are met:\r\n *\r\n *    1. Redistributions of source code must retain the above copyright notice, this list of\r\n *       conditions and the following disclaimer.\r\n *\r\n *    2. Redistributions in binary form must reproduce the above copyright notice, this list\r\n *       of conditions and the following disclaimer in the documentation and/or other materials\r\n *       provided with the distribution.\r\n *\r\n * THIS SOFTWARE IS PROVIDED BY GARY COURT ``AS IS'' AND ANY EXPRESS OR IMPLIED\r\n * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND\r\n * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GARY COURT OR\r\n * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r\n * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR\r\n * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON\r\n * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\r\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF\r\n * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r\n *\r\n * The views and conclusions contained in the software and documentation are those of the\r\n * authors and should not be interpreted as representing official policies, either expressed\r\n * or implied, of Gary Court.\r\n */\nvar SCHEMES = {};\nfunction pctEncChar(chr) {\n    var c = chr.charCodeAt(0);\n    var e = void 0;\n    if (c < 16) e = \"%0\" + c.toString(16).toUpperCase();else if (c < 128) e = \"%\" + c.toString(16).toUpperCase();else if (c < 2048) e = \"%\" + (c >> 6 | 192).toString(16).toUpperCase() + \"%\" + (c & 63 | 128).toString(16).toUpperCase();else e = \"%\" + (c >> 12 | 224).toString(16).toUpperCase() + \"%\" + (c >> 6 & 63 | 128).toString(16).toUpperCase() + \"%\" + (c & 63 | 128).toString(16).toUpperCase();\n    return e;\n}\nfunction pctDecChars(str) {\n    var newStr = \"\";\n    var i = 0;\n    var il = str.length;\n    while (i < il) {\n        var c = parseInt(str.substr(i + 1, 2), 16);\n        if (c < 128) {\n            newStr += String.fromCharCode(c);\n            i += 3;\n        } else if (c >= 194 && c < 224) {\n            if (il - i >= 6) {\n                var c2 = parseInt(str.substr(i + 4, 2), 16);\n                newStr += String.fromCharCode((c & 31) << 6 | c2 & 63);\n            } else {\n                newStr += str.substr(i, 6);\n            }\n            i += 6;\n        } else if (c >= 224) {\n            if (il - i >= 9) {\n                var _c = parseInt(str.substr(i + 4, 2), 16);\n                var c3 = parseInt(str.substr(i + 7, 2), 16);\n                newStr += String.fromCharCode((c & 15) << 12 | (_c & 63) << 6 | c3 & 63);\n            } else {\n                newStr += str.substr(i, 9);\n            }\n            i += 9;\n        } else {\n            newStr += str.substr(i, 3);\n            i += 3;\n        }\n    }\n    return newStr;\n}\nfunction _normalizeComponentEncoding(components, protocol) {\n    function decodeUnreserved(str) {\n        var decStr = pctDecChars(str);\n        return !decStr.match(protocol.UNRESERVED) ? str : decStr;\n    }\n    if (components.scheme) components.scheme = String(components.scheme).replace(protocol.PCT_ENCODED, decodeUnreserved).toLowerCase().replace(protocol.NOT_SCHEME, \"\");\n    if (components.userinfo !== undefined) components.userinfo = String(components.userinfo).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(protocol.NOT_USERINFO, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);\n    if (components.host !== undefined) components.host = String(components.host).replace(protocol.PCT_ENCODED, decodeUnreserved).toLowerCase().replace(protocol.NOT_HOST, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);\n    if (components.path !== undefined) components.path = String(components.path).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(components.scheme ? protocol.NOT_PATH : protocol.NOT_PATH_NOSCHEME, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);\n    if (components.query !== undefined) components.query = String(components.query).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(protocol.NOT_QUERY, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);\n    if (components.fragment !== undefined) components.fragment = String(components.fragment).replace(protocol.PCT_ENCODED, decodeUnreserved).replace(protocol.NOT_FRAGMENT, pctEncChar).replace(protocol.PCT_ENCODED, toUpperCase);\n    return components;\n}\n\nvar URI_PARSE = /^(?:([^:\\/?#]+):)?(?:\\/\\/((?:([^\\/?#@]*)@)?(\\[[\\dA-F:.]+\\]|[^\\/?#:]*)(?:\\:(\\d*))?))?([^?#]*)(?:\\?([^#]*))?(?:#((?:.|\\n|\\r)*))?/i;\nvar NO_MATCH_IS_UNDEFINED = \"\".match(/(){0}/)[1] === undefined;\nfunction parse(uriString) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n    var components = {};\n    var protocol = options.iri !== false ? IRI_PROTOCOL : URI_PROTOCOL;\n    if (options.reference === \"suffix\") uriString = (options.scheme ? options.scheme + \":\" : \"\") + \"//\" + uriString;\n    var matches = uriString.match(URI_PARSE);\n    if (matches) {\n        if (NO_MATCH_IS_UNDEFINED) {\n            //store each component\n            components.scheme = matches[1];\n            components.userinfo = matches[3];\n            components.host = matches[4];\n            components.port = parseInt(matches[5], 10);\n            components.path = matches[6] || \"\";\n            components.query = matches[7];\n            components.fragment = matches[8];\n            //fix port number\n            if (isNaN(components.port)) {\n                components.port = matches[5];\n            }\n        } else {\n            //store each component\n            components.scheme = matches[1] || undefined;\n            components.userinfo = uriString.indexOf(\"@\") !== -1 ? matches[3] : undefined;\n            components.host = uriString.indexOf(\"//\") !== -1 ? matches[4] : undefined;\n            components.port = parseInt(matches[5], 10);\n            components.path = matches[6] || \"\";\n            components.query = uriString.indexOf(\"?\") !== -1 ? matches[7] : undefined;\n            components.fragment = uriString.indexOf(\"#\") !== -1 ? matches[8] : undefined;\n            //fix port number\n            if (isNaN(components.port)) {\n                components.port = uriString.match(/\\/\\/(?:.|\\n)*\\:(?:\\/|\\?|\\#|$)/) ? matches[4] : undefined;\n            }\n        }\n        //strip brackets from IPv6 hosts\n        if (components.host) {\n            components.host = components.host.replace(protocol.IPV6ADDRESS, \"$1\");\n        }\n        //determine reference type\n        if (components.scheme === undefined && components.userinfo === undefined && components.host === undefined && components.port === undefined && !components.path && components.query === undefined) {\n            components.reference = \"same-document\";\n        } else if (components.scheme === undefined) {\n            components.reference = \"relative\";\n        } else if (components.fragment === undefined) {\n            components.reference = \"absolute\";\n        } else {\n            components.reference = \"uri\";\n        }\n        //check for reference errors\n        if (options.reference && options.reference !== \"suffix\" && options.reference !== components.reference) {\n            components.error = components.error || \"URI is not a \" + options.reference + \" reference.\";\n        }\n        //find scheme handler\n        var schemeHandler = SCHEMES[(options.scheme || components.scheme || \"\").toLowerCase()];\n        //check if scheme can't handle IRIs\n        if (!options.unicodeSupport && (!schemeHandler || !schemeHandler.unicodeSupport)) {\n            //if host component is a domain name\n            if (components.host && (options.domainHost || schemeHandler && schemeHandler.domainHost)) {\n                //convert Unicode IDN -> ASCII IDN\n                try {\n                    components.host = punycode.toASCII(components.host.replace(protocol.PCT_ENCODED, pctDecChars).toLowerCase());\n                } catch (e) {\n                    components.error = components.error || \"Host's domain name can not be converted to ASCII via punycode: \" + e;\n                }\n            }\n            //convert IRI -> URI\n            _normalizeComponentEncoding(components, URI_PROTOCOL);\n        } else {\n            //normalize encodings\n            _normalizeComponentEncoding(components, protocol);\n        }\n        //perform scheme specific parsing\n        if (schemeHandler && schemeHandler.parse) {\n            schemeHandler.parse(components, options);\n        }\n    } else {\n        components.error = components.error || \"URI can not be parsed.\";\n    }\n    return components;\n}\n\nfunction _recomposeAuthority(components, options) {\n    var protocol = options.iri !== false ? IRI_PROTOCOL : URI_PROTOCOL;\n    var uriTokens = [];\n    if (components.userinfo !== undefined) {\n        uriTokens.push(components.userinfo);\n        uriTokens.push(\"@\");\n    }\n    if (components.host !== undefined) {\n        //ensure IPv6 addresses are bracketed\n        uriTokens.push(String(components.host).replace(protocol.IPV6ADDRESS, \"[$1]\"));\n    }\n    if (typeof components.port === \"number\") {\n        uriTokens.push(\":\");\n        uriTokens.push(components.port.toString(10));\n    }\n    return uriTokens.length ? uriTokens.join(\"\") : undefined;\n}\n\nvar RDS1 = /^\\.\\.?\\//;\nvar RDS2 = /^\\/\\.(\\/|$)/;\nvar RDS3 = /^\\/\\.\\.(\\/|$)/;\nvar RDS5 = /^\\/?(?:.|\\n)*?(?=\\/|$)/;\nfunction removeDotSegments(input) {\n    var output = [];\n    while (input.length) {\n        if (input.match(RDS1)) {\n            input = input.replace(RDS1, \"\");\n        } else if (input.match(RDS2)) {\n            input = input.replace(RDS2, \"/\");\n        } else if (input.match(RDS3)) {\n            input = input.replace(RDS3, \"/\");\n            output.pop();\n        } else if (input === \".\" || input === \"..\") {\n            input = \"\";\n        } else {\n            var im = input.match(RDS5);\n            if (im) {\n                var s = im[0];\n                input = input.slice(s.length);\n                output.push(s);\n            } else {\n                throw new Error(\"Unexpected dot segment condition\");\n            }\n        }\n    }\n    return output.join(\"\");\n}\n\nfunction serialize(components) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n    var protocol = options.iri ? IRI_PROTOCOL : URI_PROTOCOL;\n    var uriTokens = [];\n    //find scheme handler\n    var schemeHandler = SCHEMES[(options.scheme || components.scheme || \"\").toLowerCase()];\n    //perform scheme specific serialization\n    if (schemeHandler && schemeHandler.serialize) schemeHandler.serialize(components, options);\n    if (components.host) {\n        //if host component is an IPv6 address\n        if (protocol.IPV6ADDRESS.test(components.host)) {\n            //TODO: normalize IPv6 address as per RFC 5952\n        } else if (options.domainHost || schemeHandler && schemeHandler.domainHost) {\n            //convert IDN via punycode\n            try {\n                components.host = !options.iri ? punycode.toASCII(components.host.replace(protocol.PCT_ENCODED, pctDecChars).toLowerCase()) : punycode.toUnicode(components.host);\n            } catch (e) {\n                components.error = components.error || \"Host's domain name can not be converted to \" + (!options.iri ? \"ASCII\" : \"Unicode\") + \" via punycode: \" + e;\n            }\n        }\n    }\n    //normalize encoding\n    _normalizeComponentEncoding(components, protocol);\n    if (options.reference !== \"suffix\" && components.scheme) {\n        uriTokens.push(components.scheme);\n        uriTokens.push(\":\");\n    }\n    var authority = _recomposeAuthority(components, options);\n    if (authority !== undefined) {\n        if (options.reference !== \"suffix\") {\n            uriTokens.push(\"//\");\n        }\n        uriTokens.push(authority);\n        if (components.path && components.path.charAt(0) !== \"/\") {\n            uriTokens.push(\"/\");\n        }\n    }\n    if (components.path !== undefined) {\n        var s = components.path;\n        if (!options.absolutePath && (!schemeHandler || !schemeHandler.absolutePath)) {\n            s = removeDotSegments(s);\n        }\n        if (authority === undefined) {\n            s = s.replace(/^\\/\\//, \"/%2F\"); //don't allow the path to start with \"//\"\n        }\n        uriTokens.push(s);\n    }\n    if (components.query !== undefined) {\n        uriTokens.push(\"?\");\n        uriTokens.push(components.query);\n    }\n    if (components.fragment !== undefined) {\n        uriTokens.push(\"#\");\n        uriTokens.push(components.fragment);\n    }\n    return uriTokens.join(\"\"); //merge tokens into a string\n}\n\nfunction resolveComponents(base, relative) {\n    var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n    var skipNormalization = arguments[3];\n\n    var target = {};\n    if (!skipNormalization) {\n        base = parse(serialize(base, options), options); //normalize base components\n        relative = parse(serialize(relative, options), options); //normalize relative components\n    }\n    options = options || {};\n    if (!options.tolerant && relative.scheme) {\n        target.scheme = relative.scheme;\n        //target.authority = relative.authority;\n        target.userinfo = relative.userinfo;\n        target.host = relative.host;\n        target.port = relative.port;\n        target.path = removeDotSegments(relative.path || \"\");\n        target.query = relative.query;\n    } else {\n        if (relative.userinfo !== undefined || relative.host !== undefined || relative.port !== undefined) {\n            //target.authority = relative.authority;\n            target.userinfo = relative.userinfo;\n            target.host = relative.host;\n            target.port = relative.port;\n            target.path = removeDotSegments(relative.path || \"\");\n            target.query = relative.query;\n        } else {\n            if (!relative.path) {\n                target.path = base.path;\n                if (relative.query !== undefined) {\n                    target.query = relative.query;\n                } else {\n                    target.query = base.query;\n                }\n            } else {\n                if (relative.path.charAt(0) === \"/\") {\n                    target.path = removeDotSegments(relative.path);\n                } else {\n                    if ((base.userinfo !== undefined || base.host !== undefined || base.port !== undefined) && !base.path) {\n                        target.path = \"/\" + relative.path;\n                    } else if (!base.path) {\n                        target.path = relative.path;\n                    } else {\n                        target.path = base.path.slice(0, base.path.lastIndexOf(\"/\") + 1) + relative.path;\n                    }\n                    target.path = removeDotSegments(target.path);\n                }\n                target.query = relative.query;\n            }\n            //target.authority = base.authority;\n            target.userinfo = base.userinfo;\n            target.host = base.host;\n            target.port = base.port;\n        }\n        target.scheme = base.scheme;\n    }\n    target.fragment = relative.fragment;\n    return target;\n}\n\nfunction resolve(baseURI, relativeURI, options) {\n    return serialize(resolveComponents(parse(baseURI, options), parse(relativeURI, options), options, true), options);\n}\n\nfunction normalize(uri, options) {\n    if (typeof uri === \"string\") {\n        uri = serialize(parse(uri, options), options);\n    } else if (typeOf(uri) === \"object\") {\n        uri = parse(serialize(uri, options), options);\n    }\n    return uri;\n}\n\nfunction equal(uriA, uriB, options) {\n    if (typeof uriA === \"string\") {\n        uriA = serialize(parse(uriA, options), options);\n    } else if (typeOf(uriA) === \"object\") {\n        uriA = serialize(uriA, options);\n    }\n    if (typeof uriB === \"string\") {\n        uriB = serialize(parse(uriB, options), options);\n    } else if (typeOf(uriB) === \"object\") {\n        uriB = serialize(uriB, options);\n    }\n    return uriA === uriB;\n}\n\nfunction escapeComponent(str, options) {\n    return str && str.toString().replace(!options || !options.iri ? URI_PROTOCOL.ESCAPE : IRI_PROTOCOL.ESCAPE, pctEncChar);\n}\n\nfunction unescapeComponent(str, options) {\n    return str && str.toString().replace(!options || !options.iri ? URI_PROTOCOL.PCT_ENCODED : IRI_PROTOCOL.PCT_ENCODED, pctDecChars);\n}\n\nvar http = {\n    scheme: \"http\",\n    domainHost: true,\n    parse: function parse(components, options) {\n        //report missing host\n        if (!components.host) {\n            components.error = components.error || \"HTTP URIs must have a host.\";\n        }\n        return components;\n    },\n    serialize: function serialize(components, options) {\n        //normalize the default port\n        if (components.port === (String(components.scheme).toLowerCase() !== \"https\" ? 80 : 443) || components.port === \"\") {\n            components.port = undefined;\n        }\n        //normalize the empty path\n        if (!components.path) {\n            components.path = \"/\";\n        }\n        //NOTE: We do not parse query strings for HTTP URIs\n        //as WWW Form Url Encoded query strings are part of the HTML4+ spec,\n        //and not the HTTP spec.\n        return components;\n    }\n};\n\nvar https = {\n    scheme: \"https\",\n    domainHost: http.domainHost,\n    parse: http.parse,\n    serialize: http.serialize\n};\n\nvar O = {};\nvar isIRI = true;\n//RFC 3986\nvar UNRESERVED$$ = \"[A-Za-z0-9\\\\-\\\\.\\\\_\\\\~\" + (isIRI ? \"\\\\xA0-\\\\u200D\\\\u2010-\\\\u2029\\\\u202F-\\\\uD7FF\\\\uF900-\\\\uFDCF\\\\uFDF0-\\\\uFFEF\" : \"\") + \"]\";\nvar HEXDIG$$ = \"[0-9A-Fa-f]\"; //case-insensitive\nvar PCT_ENCODED$ = subexp(subexp(\"%[EFef]\" + HEXDIG$$ + \"%\" + HEXDIG$$ + HEXDIG$$ + \"%\" + HEXDIG$$ + HEXDIG$$) + \"|\" + subexp(\"%[89A-Fa-f]\" + HEXDIG$$ + \"%\" + HEXDIG$$ + HEXDIG$$) + \"|\" + subexp(\"%\" + HEXDIG$$ + HEXDIG$$)); //expanded\n//RFC 5322, except these symbols as per RFC 6068: @ : / ? # [ ] & ; =\n//const ATEXT$$ = \"[A-Za-z0-9\\\\!\\\\#\\\\$\\\\%\\\\&\\\\'\\\\*\\\\+\\\\-\\\\/\\\\=\\\\?\\\\^\\\\_\\\\`\\\\{\\\\|\\\\}\\\\~]\";\n//const WSP$$ = \"[\\\\x20\\\\x09]\";\n//const OBS_QTEXT$$ = \"[\\\\x01-\\\\x08\\\\x0B\\\\x0C\\\\x0E-\\\\x1F\\\\x7F]\";  //(%d1-8 / %d11-12 / %d14-31 / %d127)\n//const QTEXT$$ = merge(\"[\\\\x21\\\\x23-\\\\x5B\\\\x5D-\\\\x7E]\", OBS_QTEXT$$);  //%d33 / %d35-91 / %d93-126 / obs-qtext\n//const VCHAR$$ = \"[\\\\x21-\\\\x7E]\";\n//const WSP$$ = \"[\\\\x20\\\\x09]\";\n//const OBS_QP$ = subexp(\"\\\\\\\\\" + merge(\"[\\\\x00\\\\x0D\\\\x0A]\", OBS_QTEXT$$));  //%d0 / CR / LF / obs-qtext\n//const FWS$ = subexp(subexp(WSP$$ + \"*\" + \"\\\\x0D\\\\x0A\") + \"?\" + WSP$$ + \"+\");\n//const QUOTED_PAIR$ = subexp(subexp(\"\\\\\\\\\" + subexp(VCHAR$$ + \"|\" + WSP$$)) + \"|\" + OBS_QP$);\n//const QUOTED_STRING$ = subexp('\\\\\"' + subexp(FWS$ + \"?\" + QCONTENT$) + \"*\" + FWS$ + \"?\" + '\\\\\"');\nvar ATEXT$$ = \"[A-Za-z0-9\\\\!\\\\$\\\\%\\\\'\\\\*\\\\+\\\\-\\\\^\\\\_\\\\`\\\\{\\\\|\\\\}\\\\~]\";\nvar QTEXT$$ = \"[\\\\!\\\\$\\\\%\\\\'\\\\(\\\\)\\\\*\\\\+\\\\,\\\\-\\\\.0-9\\\\<\\\\>A-Z\\\\x5E-\\\\x7E]\";\nvar VCHAR$$ = merge(QTEXT$$, \"[\\\\\\\"\\\\\\\\]\");\nvar SOME_DELIMS$$ = \"[\\\\!\\\\$\\\\'\\\\(\\\\)\\\\*\\\\+\\\\,\\\\;\\\\:\\\\@]\";\nvar UNRESERVED = new RegExp(UNRESERVED$$, \"g\");\nvar PCT_ENCODED = new RegExp(PCT_ENCODED$, \"g\");\nvar NOT_LOCAL_PART = new RegExp(merge(\"[^]\", ATEXT$$, \"[\\\\.]\", '[\\\\\"]', VCHAR$$), \"g\");\nvar NOT_HFNAME = new RegExp(merge(\"[^]\", UNRESERVED$$, SOME_DELIMS$$), \"g\");\nvar NOT_HFVALUE = NOT_HFNAME;\nfunction decodeUnreserved(str) {\n    var decStr = pctDecChars(str);\n    return !decStr.match(UNRESERVED) ? str : decStr;\n}\nvar mailto = {\n    scheme: \"mailto\",\n    parse: function parse$$1(components, options) {\n        var to = components.to = components.path ? components.path.split(\",\") : [];\n        components.path = undefined;\n        if (components.query) {\n            var unknownHeaders = false;\n            var headers = {};\n            var hfields = components.query.split(\"&\");\n            for (var x = 0, xl = hfields.length; x < xl; ++x) {\n                var hfield = hfields[x].split(\"=\");\n                switch (hfield[0]) {\n                    case \"to\":\n                        var toAddrs = hfield[1].split(\",\");\n                        for (var _x = 0, _xl = toAddrs.length; _x < _xl; ++_x) {\n                            to.push(toAddrs[_x]);\n                        }\n                        break;\n                    case \"subject\":\n                        components.subject = unescapeComponent(hfield[1], options);\n                        break;\n                    case \"body\":\n                        components.body = unescapeComponent(hfield[1], options);\n                        break;\n                    default:\n                        unknownHeaders = true;\n                        headers[unescapeComponent(hfield[0], options)] = unescapeComponent(hfield[1], options);\n                        break;\n                }\n            }\n            if (unknownHeaders) components.headers = headers;\n        }\n        components.query = undefined;\n        for (var _x2 = 0, _xl2 = to.length; _x2 < _xl2; ++_x2) {\n            var addr = to[_x2].split(\"@\");\n            addr[0] = unescapeComponent(addr[0]);\n            if (!options.unicodeSupport) {\n                //convert Unicode IDN -> ASCII IDN\n                try {\n                    addr[1] = punycode.toASCII(unescapeComponent(addr[1], options).toLowerCase());\n                } catch (e) {\n                    components.error = components.error || \"Email address's domain name can not be converted to ASCII via punycode: \" + e;\n                }\n            } else {\n                addr[1] = unescapeComponent(addr[1], options).toLowerCase();\n            }\n            to[_x2] = addr.join(\"@\");\n        }\n        return components;\n    },\n    serialize: function serialize$$1(components, options) {\n        var to = toArray(components.to);\n        if (to) {\n            for (var x = 0, xl = to.length; x < xl; ++x) {\n                var toAddr = String(to[x]);\n                var atIdx = toAddr.lastIndexOf(\"@\");\n                var localPart = toAddr.slice(0, atIdx).replace(PCT_ENCODED, decodeUnreserved).replace(PCT_ENCODED, toUpperCase).replace(NOT_LOCAL_PART, pctEncChar);\n                var domain = toAddr.slice(atIdx + 1);\n                //convert IDN via punycode\n                try {\n                    domain = !options.iri ? punycode.toASCII(unescapeComponent(domain, options).toLowerCase()) : punycode.toUnicode(domain);\n                } catch (e) {\n                    components.error = components.error || \"Email address's domain name can not be converted to \" + (!options.iri ? \"ASCII\" : \"Unicode\") + \" via punycode: \" + e;\n                }\n                to[x] = localPart + \"@\" + domain;\n            }\n            components.path = to.join(\",\");\n        }\n        var headers = components.headers = components.headers || {};\n        if (components.subject) headers[\"subject\"] = components.subject;\n        if (components.body) headers[\"body\"] = components.body;\n        var fields = [];\n        for (var name in headers) {\n            if (headers[name] !== O[name]) {\n                fields.push(name.replace(PCT_ENCODED, decodeUnreserved).replace(PCT_ENCODED, toUpperCase).replace(NOT_HFNAME, pctEncChar) + \"=\" + headers[name].replace(PCT_ENCODED, decodeUnreserved).replace(PCT_ENCODED, toUpperCase).replace(NOT_HFVALUE, pctEncChar));\n            }\n        }\n        if (fields.length) {\n            components.query = fields.join(\"&\");\n        }\n        return components;\n    }\n};\n\nvar NID$ = \"(?:[0-9A-Za-z][0-9A-Za-z\\\\-]{1,31})\";\nvar URN_SCHEME = new RegExp(\"^urn\\\\:(\" + NID$ + \")$\");\nvar URN_PARSE = /^([^\\:]+)\\:(.*)/;\nvar URN_EXCLUDED = /[\\x00-\\x20\\\\\\\"\\&\\<\\>\\[\\]\\^\\`\\{\\|\\}\\~\\x7F-\\xFF]/g;\n//RFC 2141\nvar urn = {\n    scheme: \"urn\",\n    parse: function parse$$1(components, options) {\n        var matches = components.path && components.path.match(URN_PARSE);\n        if (matches) {\n            var scheme = \"urn:\" + matches[1].toLowerCase();\n            var schemeHandler = SCHEMES[scheme];\n            //in order to serialize properly,\n            //every URN must have a serializer that calls the URN serializer\n            if (!schemeHandler) {\n                //create fake scheme handler\n                schemeHandler = SCHEMES[scheme] = {\n                    scheme: scheme,\n                    parse: function parse$$1(components, options) {\n                        return components;\n                    },\n                    serialize: SCHEMES[\"urn\"].serialize\n                };\n            }\n            components.scheme = scheme;\n            components.path = matches[2];\n            components = schemeHandler.parse(components, options);\n        } else {\n            components.error = components.error || \"URN can not be parsed.\";\n        }\n        return components;\n    },\n    serialize: function serialize$$1(components, options) {\n        var scheme = components.scheme || options.scheme;\n        if (scheme && scheme !== \"urn\") {\n            var matches = scheme.match(URN_SCHEME) || [\"urn:\" + scheme, scheme];\n            components.scheme = \"urn\";\n            components.path = matches[1] + \":\" + (components.path ? components.path.replace(URN_EXCLUDED, pctEncChar) : \"\");\n        }\n        return components;\n    }\n};\n\nvar UUID = /^[0-9A-Fa-f]{8}(?:\\-[0-9A-Fa-f]{4}){3}\\-[0-9A-Fa-f]{12}$/;\n//RFC 4122\nvar uuid = {\n    scheme: \"urn:uuid\",\n    parse: function parse$$1(components, options) {\n        if (!options.tolerant && (!components.path || !components.path.match(UUID))) {\n            components.error = components.error || \"UUID is not valid.\";\n        }\n        return components;\n    },\n    serialize: function serialize$$1(components, options) {\n        //ensure UUID is valid\n        if (!options.tolerant && (!components.path || !components.path.match(UUID))) {\n            //invalid UUIDs can not have this scheme\n            components.scheme = undefined;\n        } else {\n            //normalize UUID\n            components.path = (components.path || \"\").toLowerCase();\n        }\n        return SCHEMES[\"urn\"].serialize(components, options);\n    }\n};\n\nSCHEMES[\"http\"] = http;\nSCHEMES[\"https\"] = https;\nSCHEMES[\"mailto\"] = mailto;\nSCHEMES[\"urn\"] = urn;\nSCHEMES[\"urn:uuid\"] = uuid;\n\nexports.SCHEMES = SCHEMES;\nexports.pctEncChar = pctEncChar;\nexports.pctDecChars = pctDecChars;\nexports.parse = parse;\nexports.removeDotSegments = removeDotSegments;\nexports.serialize = serialize;\nexports.resolveComponents = resolveComponents;\nexports.resolve = resolve;\nexports.normalize = normalize;\nexports.equal = equal;\nexports.escapeComponent = escapeComponent;\nexports.unescapeComponent = unescapeComponent;\n\nObject.defineProperty(exports, '__esModule', { value: true });\n\n})));\n//# sourceMappingURL=uri.all.js.map\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar punycode = require('punycode');\nvar util = require('./util');\n\nexports.parse = urlParse;\nexports.resolve = urlResolve;\nexports.resolveObject = urlResolveObject;\nexports.format = urlFormat;\n\nexports.Url = Url;\n\nfunction Url() {\n  this.protocol = null;\n  this.slashes = null;\n  this.auth = null;\n  this.host = null;\n  this.port = null;\n  this.hostname = null;\n  this.hash = null;\n  this.search = null;\n  this.query = null;\n  this.pathname = null;\n  this.path = null;\n  this.href = null;\n}\n\n// Reference: RFC 3986, RFC 1808, RFC 2396\n\n// define these here so at least they only have to be\n// compiled once on the first module load.\nvar protocolPattern = /^([a-z0-9.+-]+:)/i,\n    portPattern = /:[0-9]*$/,\n\n    // Special case for a simple path URL\n    simplePathPattern = /^(\\/\\/?(?!\\/)[^\\?\\s]*)(\\?[^\\s]*)?$/,\n\n    // RFC 2396: characters reserved for delimiting URLs.\n    // We actually just auto-escape these.\n    delims = ['<', '>', '\"', '`', ' ', '\\r', '\\n', '\\t'],\n\n    // RFC 2396: characters not allowed for various reasons.\n    unwise = ['{', '}', '|', '\\\\', '^', '`'].concat(delims),\n\n    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.\n    autoEscape = ['\\''].concat(unwise),\n    // Characters that are never ever allowed in a hostname.\n    // Note that any invalid chars are also handled, but these\n    // are the ones that are *expected* to be seen, so we fast-path\n    // them.\n    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),\n    hostEndingChars = ['/', '?', '#'],\n    hostnameMaxLen = 255,\n    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,\n    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,\n    // protocols that can allow \"unsafe\" and \"unwise\" chars.\n    unsafeProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that never have a hostname.\n    hostlessProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that always contain a // bit.\n    slashedProtocol = {\n      'http': true,\n      'https': true,\n      'ftp': true,\n      'gopher': true,\n      'file': true,\n      'http:': true,\n      'https:': true,\n      'ftp:': true,\n      'gopher:': true,\n      'file:': true\n    },\n    querystring = require('querystring');\n\nfunction urlParse(url, parseQueryString, slashesDenoteHost) {\n  if (url && util.isObject(url) && url instanceof Url) return url;\n\n  var u = new Url;\n  u.parse(url, parseQueryString, slashesDenoteHost);\n  return u;\n}\n\nUrl.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {\n  if (!util.isString(url)) {\n    throw new TypeError(\"Parameter 'url' must be a string, not \" + typeof url);\n  }\n\n  // Copy chrome, IE, opera backslash-handling behavior.\n  // Back slashes before the query string get converted to forward slashes\n  // See: https://code.google.com/p/chromium/issues/detail?id=25916\n  var queryIndex = url.indexOf('?'),\n      splitter =\n          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',\n      uSplit = url.split(splitter),\n      slashRegex = /\\\\/g;\n  uSplit[0] = uSplit[0].replace(slashRegex, '/');\n  url = uSplit.join(splitter);\n\n  var rest = url;\n\n  // trim before proceeding.\n  // This is to support parse stuff like \"  http://foo.com  \\n\"\n  rest = rest.trim();\n\n  if (!slashesDenoteHost && url.split('#').length === 1) {\n    // Try fast path regexp\n    var simplePath = simplePathPattern.exec(rest);\n    if (simplePath) {\n      this.path = rest;\n      this.href = rest;\n      this.pathname = simplePath[1];\n      if (simplePath[2]) {\n        this.search = simplePath[2];\n        if (parseQueryString) {\n          this.query = querystring.parse(this.search.substr(1));\n        } else {\n          this.query = this.search.substr(1);\n        }\n      } else if (parseQueryString) {\n        this.search = '';\n        this.query = {};\n      }\n      return this;\n    }\n  }\n\n  var proto = protocolPattern.exec(rest);\n  if (proto) {\n    proto = proto[0];\n    var lowerProto = proto.toLowerCase();\n    this.protocol = lowerProto;\n    rest = rest.substr(proto.length);\n  }\n\n  // figure out if it's got a host\n  // user@server is *always* interpreted as a hostname, and url\n  // resolution will treat //foo/bar as host=foo,path=bar because that's\n  // how the browser resolves relative URLs.\n  if (slashesDenoteHost || proto || rest.match(/^\\/\\/[^@\\/]+@[^@\\/]+/)) {\n    var slashes = rest.substr(0, 2) === '//';\n    if (slashes && !(proto && hostlessProtocol[proto])) {\n      rest = rest.substr(2);\n      this.slashes = true;\n    }\n  }\n\n  if (!hostlessProtocol[proto] &&\n      (slashes || (proto && !slashedProtocol[proto]))) {\n\n    // there's a hostname.\n    // the first instance of /, ?, ;, or # ends the host.\n    //\n    // If there is an @ in the hostname, then non-host chars *are* allowed\n    // to the left of the last @ sign, unless some host-ending character\n    // comes *before* the @-sign.\n    // URLs are obnoxious.\n    //\n    // ex:\n    // http://a@b@c/ => user:a@b host:c\n    // http://a@b?@c => user:a host:c path:/?@c\n\n    // v0.12 TODO(isaacs): This is not quite how Chrome does things.\n    // Review our test case against browsers more comprehensively.\n\n    // find the first instance of any hostEndingChars\n    var hostEnd = -1;\n    for (var i = 0; i < hostEndingChars.length; i++) {\n      var hec = rest.indexOf(hostEndingChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n\n    // at this point, either we have an explicit point where the\n    // auth portion cannot go past, or the last @ char is the decider.\n    var auth, atSign;\n    if (hostEnd === -1) {\n      // atSign can be anywhere.\n      atSign = rest.lastIndexOf('@');\n    } else {\n      // atSign must be in auth portion.\n      // http://a@b/c@d => host:b auth:a path:/c@d\n      atSign = rest.lastIndexOf('@', hostEnd);\n    }\n\n    // Now we have a portion which is definitely the auth.\n    // Pull that off.\n    if (atSign !== -1) {\n      auth = rest.slice(0, atSign);\n      rest = rest.slice(atSign + 1);\n      this.auth = decodeURIComponent(auth);\n    }\n\n    // the host is the remaining to the left of the first non-host char\n    hostEnd = -1;\n    for (var i = 0; i < nonHostChars.length; i++) {\n      var hec = rest.indexOf(nonHostChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n    // if we still have not hit it, then the entire thing is a host.\n    if (hostEnd === -1)\n      hostEnd = rest.length;\n\n    this.host = rest.slice(0, hostEnd);\n    rest = rest.slice(hostEnd);\n\n    // pull out port.\n    this.parseHost();\n\n    // we've indicated that there is a hostname,\n    // so even if it's empty, it has to be present.\n    this.hostname = this.hostname || '';\n\n    // if hostname begins with [ and ends with ]\n    // assume that it's an IPv6 address.\n    var ipv6Hostname = this.hostname[0] === '[' &&\n        this.hostname[this.hostname.length - 1] === ']';\n\n    // validate a little.\n    if (!ipv6Hostname) {\n      var hostparts = this.hostname.split(/\\./);\n      for (var i = 0, l = hostparts.length; i < l; i++) {\n        var part = hostparts[i];\n        if (!part) continue;\n        if (!part.match(hostnamePartPattern)) {\n          var newpart = '';\n          for (var j = 0, k = part.length; j < k; j++) {\n            if (part.charCodeAt(j) > 127) {\n              // we replace non-ASCII char with a temporary placeholder\n              // we need this to make sure size of hostname is not\n              // broken by replacing non-ASCII by nothing\n              newpart += 'x';\n            } else {\n              newpart += part[j];\n            }\n          }\n          // we test again with ASCII char only\n          if (!newpart.match(hostnamePartPattern)) {\n            var validParts = hostparts.slice(0, i);\n            var notHost = hostparts.slice(i + 1);\n            var bit = part.match(hostnamePartStart);\n            if (bit) {\n              validParts.push(bit[1]);\n              notHost.unshift(bit[2]);\n            }\n            if (notHost.length) {\n              rest = '/' + notHost.join('.') + rest;\n            }\n            this.hostname = validParts.join('.');\n            break;\n          }\n        }\n      }\n    }\n\n    if (this.hostname.length > hostnameMaxLen) {\n      this.hostname = '';\n    } else {\n      // hostnames are always lower case.\n      this.hostname = this.hostname.toLowerCase();\n    }\n\n    if (!ipv6Hostname) {\n      // IDNA Support: Returns a punycoded representation of \"domain\".\n      // It only converts parts of the domain name that\n      // have non-ASCII characters, i.e. it doesn't matter if\n      // you call it with a domain that already is ASCII-only.\n      this.hostname = punycode.toASCII(this.hostname);\n    }\n\n    var p = this.port ? ':' + this.port : '';\n    var h = this.hostname || '';\n    this.host = h + p;\n    this.href += this.host;\n\n    // strip [ and ] from the hostname\n    // the host field still retains them, though\n    if (ipv6Hostname) {\n      this.hostname = this.hostname.substr(1, this.hostname.length - 2);\n      if (rest[0] !== '/') {\n        rest = '/' + rest;\n      }\n    }\n  }\n\n  // now rest is set to the post-host stuff.\n  // chop off any delim chars.\n  if (!unsafeProtocol[lowerProto]) {\n\n    // First, make 100% sure that any \"autoEscape\" chars get\n    // escaped, even if encodeURIComponent doesn't think they\n    // need to be.\n    for (var i = 0, l = autoEscape.length; i < l; i++) {\n      var ae = autoEscape[i];\n      if (rest.indexOf(ae) === -1)\n        continue;\n      var esc = encodeURIComponent(ae);\n      if (esc === ae) {\n        esc = escape(ae);\n      }\n      rest = rest.split(ae).join(esc);\n    }\n  }\n\n\n  // chop off from the tail first.\n  var hash = rest.indexOf('#');\n  if (hash !== -1) {\n    // got a fragment string.\n    this.hash = rest.substr(hash);\n    rest = rest.slice(0, hash);\n  }\n  var qm = rest.indexOf('?');\n  if (qm !== -1) {\n    this.search = rest.substr(qm);\n    this.query = rest.substr(qm + 1);\n    if (parseQueryString) {\n      this.query = querystring.parse(this.query);\n    }\n    rest = rest.slice(0, qm);\n  } else if (parseQueryString) {\n    // no query string, but parseQueryString still requested\n    this.search = '';\n    this.query = {};\n  }\n  if (rest) this.pathname = rest;\n  if (slashedProtocol[lowerProto] &&\n      this.hostname && !this.pathname) {\n    this.pathname = '/';\n  }\n\n  //to support http.request\n  if (this.pathname || this.search) {\n    var p = this.pathname || '';\n    var s = this.search || '';\n    this.path = p + s;\n  }\n\n  // finally, reconstruct the href based on what has been validated.\n  this.href = this.format();\n  return this;\n};\n\n// format a parsed object into a url string\nfunction urlFormat(obj) {\n  // ensure it's an object, and not a string url.\n  // If it's an obj, this is a no-op.\n  // this way, you can call url_format() on strings\n  // to clean up potentially wonky urls.\n  if (util.isString(obj)) obj = urlParse(obj);\n  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);\n  return obj.format();\n}\n\nUrl.prototype.format = function() {\n  var auth = this.auth || '';\n  if (auth) {\n    auth = encodeURIComponent(auth);\n    auth = auth.replace(/%3A/i, ':');\n    auth += '@';\n  }\n\n  var protocol = this.protocol || '',\n      pathname = this.pathname || '',\n      hash = this.hash || '',\n      host = false,\n      query = '';\n\n  if (this.host) {\n    host = auth + this.host;\n  } else if (this.hostname) {\n    host = auth + (this.hostname.indexOf(':') === -1 ?\n        this.hostname :\n        '[' + this.hostname + ']');\n    if (this.port) {\n      host += ':' + this.port;\n    }\n  }\n\n  if (this.query &&\n      util.isObject(this.query) &&\n      Object.keys(this.query).length) {\n    query = querystring.stringify(this.query);\n  }\n\n  var search = this.search || (query && ('?' + query)) || '';\n\n  if (protocol && protocol.substr(-1) !== ':') protocol += ':';\n\n  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.\n  // unless they had them to begin with.\n  if (this.slashes ||\n      (!protocol || slashedProtocol[protocol]) && host !== false) {\n    host = '//' + (host || '');\n    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;\n  } else if (!host) {\n    host = '';\n  }\n\n  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;\n  if (search && search.charAt(0) !== '?') search = '?' + search;\n\n  pathname = pathname.replace(/[?#]/g, function(match) {\n    return encodeURIComponent(match);\n  });\n  search = search.replace('#', '%23');\n\n  return protocol + host + pathname + search + hash;\n};\n\nfunction urlResolve(source, relative) {\n  return urlParse(source, false, true).resolve(relative);\n}\n\nUrl.prototype.resolve = function(relative) {\n  return this.resolveObject(urlParse(relative, false, true)).format();\n};\n\nfunction urlResolveObject(source, relative) {\n  if (!source) return relative;\n  return urlParse(source, false, true).resolveObject(relative);\n}\n\nUrl.prototype.resolveObject = function(relative) {\n  if (util.isString(relative)) {\n    var rel = new Url();\n    rel.parse(relative, false, true);\n    relative = rel;\n  }\n\n  var result = new Url();\n  var tkeys = Object.keys(this);\n  for (var tk = 0; tk < tkeys.length; tk++) {\n    var tkey = tkeys[tk];\n    result[tkey] = this[tkey];\n  }\n\n  // hash is always overridden, no matter what.\n  // even href=\"\" will remove it.\n  result.hash = relative.hash;\n\n  // if the relative url is empty, then there's nothing left to do here.\n  if (relative.href === '') {\n    result.href = result.format();\n    return result;\n  }\n\n  // hrefs like //foo/bar always cut to the protocol.\n  if (relative.slashes && !relative.protocol) {\n    // take everything except the protocol from relative\n    var rkeys = Object.keys(relative);\n    for (var rk = 0; rk < rkeys.length; rk++) {\n      var rkey = rkeys[rk];\n      if (rkey !== 'protocol')\n        result[rkey] = relative[rkey];\n    }\n\n    //urlParse appends trailing / to urls like http://www.example.com\n    if (slashedProtocol[result.protocol] &&\n        result.hostname && !result.pathname) {\n      result.path = result.pathname = '/';\n    }\n\n    result.href = result.format();\n    return result;\n  }\n\n  if (relative.protocol && relative.protocol !== result.protocol) {\n    // if it's a known url protocol, then changing\n    // the protocol does weird things\n    // first, if it's not file:, then we MUST have a host,\n    // and if there was a path\n    // to begin with, then we MUST have a path.\n    // if it is file:, then the host is dropped,\n    // because that's known to be hostless.\n    // anything else is assumed to be absolute.\n    if (!slashedProtocol[relative.protocol]) {\n      var keys = Object.keys(relative);\n      for (var v = 0; v < keys.length; v++) {\n        var k = keys[v];\n        result[k] = relative[k];\n      }\n      result.href = result.format();\n      return result;\n    }\n\n    result.protocol = relative.protocol;\n    if (!relative.host && !hostlessProtocol[relative.protocol]) {\n      var relPath = (relative.pathname || '').split('/');\n      while (relPath.length && !(relative.host = relPath.shift()));\n      if (!relative.host) relative.host = '';\n      if (!relative.hostname) relative.hostname = '';\n      if (relPath[0] !== '') relPath.unshift('');\n      if (relPath.length < 2) relPath.unshift('');\n      result.pathname = relPath.join('/');\n    } else {\n      result.pathname = relative.pathname;\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    result.host = relative.host || '';\n    result.auth = relative.auth;\n    result.hostname = relative.hostname || relative.host;\n    result.port = relative.port;\n    // to support http.request\n    if (result.pathname || result.search) {\n      var p = result.pathname || '';\n      var s = result.search || '';\n      result.path = p + s;\n    }\n    result.slashes = result.slashes || relative.slashes;\n    result.href = result.format();\n    return result;\n  }\n\n  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),\n      isRelAbs = (\n          relative.host ||\n          relative.pathname && relative.pathname.charAt(0) === '/'\n      ),\n      mustEndAbs = (isRelAbs || isSourceAbs ||\n                    (result.host && relative.pathname)),\n      removeAllDots = mustEndAbs,\n      srcPath = result.pathname && result.pathname.split('/') || [],\n      relPath = relative.pathname && relative.pathname.split('/') || [],\n      psychotic = result.protocol && !slashedProtocol[result.protocol];\n\n  // if the url is a non-slashed url, then relative\n  // links like ../.. should be able\n  // to crawl up to the hostname, as well.  This is strange.\n  // result.protocol has already been set by now.\n  // Later on, put the first path part into the host field.\n  if (psychotic) {\n    result.hostname = '';\n    result.port = null;\n    if (result.host) {\n      if (srcPath[0] === '') srcPath[0] = result.host;\n      else srcPath.unshift(result.host);\n    }\n    result.host = '';\n    if (relative.protocol) {\n      relative.hostname = null;\n      relative.port = null;\n      if (relative.host) {\n        if (relPath[0] === '') relPath[0] = relative.host;\n        else relPath.unshift(relative.host);\n      }\n      relative.host = null;\n    }\n    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');\n  }\n\n  if (isRelAbs) {\n    // it's absolute.\n    result.host = (relative.host || relative.host === '') ?\n                  relative.host : result.host;\n    result.hostname = (relative.hostname || relative.hostname === '') ?\n                      relative.hostname : result.hostname;\n    result.search = relative.search;\n    result.query = relative.query;\n    srcPath = relPath;\n    // fall through to the dot-handling below.\n  } else if (relPath.length) {\n    // it's relative\n    // throw away the existing file, and take the new path instead.\n    if (!srcPath) srcPath = [];\n    srcPath.pop();\n    srcPath = srcPath.concat(relPath);\n    result.search = relative.search;\n    result.query = relative.query;\n  } else if (!util.isNullOrUndefined(relative.search)) {\n    // just pull out the search.\n    // like href='?foo'.\n    // Put this after the other two cases because it simplifies the booleans\n    if (psychotic) {\n      result.hostname = result.host = srcPath.shift();\n      //occationaly the auth can get stuck only in host\n      //this especially happens in cases like\n      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n      var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                       result.host.split('@') : false;\n      if (authInHost) {\n        result.auth = authInHost.shift();\n        result.host = result.hostname = authInHost.shift();\n      }\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    //to support http.request\n    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {\n      result.path = (result.pathname ? result.pathname : '') +\n                    (result.search ? result.search : '');\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  if (!srcPath.length) {\n    // no path at all.  easy.\n    // we've already handled the other stuff above.\n    result.pathname = null;\n    //to support http.request\n    if (result.search) {\n      result.path = '/' + result.search;\n    } else {\n      result.path = null;\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  // if a url ENDs in . or .., then it must get a trailing slash.\n  // however, if it ends in anything else non-slashy,\n  // then it must NOT get a trailing slash.\n  var last = srcPath.slice(-1)[0];\n  var hasTrailingSlash = (\n      (result.host || relative.host || srcPath.length > 1) &&\n      (last === '.' || last === '..') || last === '');\n\n  // strip single dots, resolve double dots to parent dir\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = srcPath.length; i >= 0; i--) {\n    last = srcPath[i];\n    if (last === '.') {\n      srcPath.splice(i, 1);\n    } else if (last === '..') {\n      srcPath.splice(i, 1);\n      up++;\n    } else if (up) {\n      srcPath.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (!mustEndAbs && !removeAllDots) {\n    for (; up--; up) {\n      srcPath.unshift('..');\n    }\n  }\n\n  if (mustEndAbs && srcPath[0] !== '' &&\n      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {\n    srcPath.unshift('');\n  }\n\n  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {\n    srcPath.push('');\n  }\n\n  var isAbsolute = srcPath[0] === '' ||\n      (srcPath[0] && srcPath[0].charAt(0) === '/');\n\n  // put the host back\n  if (psychotic) {\n    result.hostname = result.host = isAbsolute ? '' :\n                                    srcPath.length ? srcPath.shift() : '';\n    //occationaly the auth can get stuck only in host\n    //this especially happens in cases like\n    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n    var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                     result.host.split('@') : false;\n    if (authInHost) {\n      result.auth = authInHost.shift();\n      result.host = result.hostname = authInHost.shift();\n    }\n  }\n\n  mustEndAbs = mustEndAbs || (result.host && srcPath.length);\n\n  if (mustEndAbs && !isAbsolute) {\n    srcPath.unshift('');\n  }\n\n  if (!srcPath.length) {\n    result.pathname = null;\n    result.path = null;\n  } else {\n    result.pathname = srcPath.join('/');\n  }\n\n  //to support request.http\n  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {\n    result.path = (result.pathname ? result.pathname : '') +\n                  (result.search ? result.search : '');\n  }\n  result.auth = relative.auth || result.auth;\n  result.slashes = result.slashes || relative.slashes;\n  result.href = result.format();\n  return result;\n};\n\nUrl.prototype.parseHost = function() {\n  var host = this.host;\n  var port = portPattern.exec(host);\n  if (port) {\n    port = port[0];\n    if (port !== ':') {\n      this.port = port.substr(1);\n    }\n    host = host.substr(0, host.length - port.length);\n  }\n  if (host) this.hostname = host;\n};\n","'use strict';\n\nmodule.exports = {\n  isString: function(arg) {\n    return typeof(arg) === 'string';\n  },\n  isObject: function(arg) {\n    return typeof(arg) === 'object' && arg !== null;\n  },\n  isNull: function(arg) {\n    return arg === null;\n  },\n  isNullOrUndefined: function(arg) {\n    return arg == null;\n  }\n};\n","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _toDate = require('./lib/toDate');\n\nvar _toDate2 = _interopRequireDefault(_toDate);\n\nvar _toFloat = require('./lib/toFloat');\n\nvar _toFloat2 = _interopRequireDefault(_toFloat);\n\nvar _toInt = require('./lib/toInt');\n\nvar _toInt2 = _interopRequireDefault(_toInt);\n\nvar _toBoolean = require('./lib/toBoolean');\n\nvar _toBoolean2 = _interopRequireDefault(_toBoolean);\n\nvar _equals = require('./lib/equals');\n\nvar _equals2 = _interopRequireDefault(_equals);\n\nvar _contains = require('./lib/contains');\n\nvar _contains2 = _interopRequireDefault(_contains);\n\nvar _matches = require('./lib/matches');\n\nvar _matches2 = _interopRequireDefault(_matches);\n\nvar _isEmail = require('./lib/isEmail');\n\nvar _isEmail2 = _interopRequireDefault(_isEmail);\n\nvar _isURL = require('./lib/isURL');\n\nvar _isURL2 = _interopRequireDefault(_isURL);\n\nvar _isMACAddress = require('./lib/isMACAddress');\n\nvar _isMACAddress2 = _interopRequireDefault(_isMACAddress);\n\nvar _isIP = require('./lib/isIP');\n\nvar _isIP2 = _interopRequireDefault(_isIP);\n\nvar _isFQDN = require('./lib/isFQDN');\n\nvar _isFQDN2 = _interopRequireDefault(_isFQDN);\n\nvar _isBoolean = require('./lib/isBoolean');\n\nvar _isBoolean2 = _interopRequireDefault(_isBoolean);\n\nvar _isAlpha = require('./lib/isAlpha');\n\nvar _isAlpha2 = _interopRequireDefault(_isAlpha);\n\nvar _isAlphanumeric = require('./lib/isAlphanumeric');\n\nvar _isAlphanumeric2 = _interopRequireDefault(_isAlphanumeric);\n\nvar _isNumeric = require('./lib/isNumeric');\n\nvar _isNumeric2 = _interopRequireDefault(_isNumeric);\n\nvar _isPort = require('./lib/isPort');\n\nvar _isPort2 = _interopRequireDefault(_isPort);\n\nvar _isLowercase = require('./lib/isLowercase');\n\nvar _isLowercase2 = _interopRequireDefault(_isLowercase);\n\nvar _isUppercase = require('./lib/isUppercase');\n\nvar _isUppercase2 = _interopRequireDefault(_isUppercase);\n\nvar _isAscii = require('./lib/isAscii');\n\nvar _isAscii2 = _interopRequireDefault(_isAscii);\n\nvar _isFullWidth = require('./lib/isFullWidth');\n\nvar _isFullWidth2 = _interopRequireDefault(_isFullWidth);\n\nvar _isHalfWidth = require('./lib/isHalfWidth');\n\nvar _isHalfWidth2 = _interopRequireDefault(_isHalfWidth);\n\nvar _isVariableWidth = require('./lib/isVariableWidth');\n\nvar _isVariableWidth2 = _interopRequireDefault(_isVariableWidth);\n\nvar _isMultibyte = require('./lib/isMultibyte');\n\nvar _isMultibyte2 = _interopRequireDefault(_isMultibyte);\n\nvar _isSurrogatePair = require('./lib/isSurrogatePair');\n\nvar _isSurrogatePair2 = _interopRequireDefault(_isSurrogatePair);\n\nvar _isInt = require('./lib/isInt');\n\nvar _isInt2 = _interopRequireDefault(_isInt);\n\nvar _isFloat = require('./lib/isFloat');\n\nvar _isFloat2 = _interopRequireDefault(_isFloat);\n\nvar _isDecimal = require('./lib/isDecimal');\n\nvar _isDecimal2 = _interopRequireDefault(_isDecimal);\n\nvar _isHexadecimal = require('./lib/isHexadecimal');\n\nvar _isHexadecimal2 = _interopRequireDefault(_isHexadecimal);\n\nvar _isDivisibleBy = require('./lib/isDivisibleBy');\n\nvar _isDivisibleBy2 = _interopRequireDefault(_isDivisibleBy);\n\nvar _isHexColor = require('./lib/isHexColor');\n\nvar _isHexColor2 = _interopRequireDefault(_isHexColor);\n\nvar _isISRC = require('./lib/isISRC');\n\nvar _isISRC2 = _interopRequireDefault(_isISRC);\n\nvar _isMD = require('./lib/isMD5');\n\nvar _isMD2 = _interopRequireDefault(_isMD);\n\nvar _isHash = require('./lib/isHash');\n\nvar _isHash2 = _interopRequireDefault(_isHash);\n\nvar _isJSON = require('./lib/isJSON');\n\nvar _isJSON2 = _interopRequireDefault(_isJSON);\n\nvar _isEmpty = require('./lib/isEmpty');\n\nvar _isEmpty2 = _interopRequireDefault(_isEmpty);\n\nvar _isLength = require('./lib/isLength');\n\nvar _isLength2 = _interopRequireDefault(_isLength);\n\nvar _isByteLength = require('./lib/isByteLength');\n\nvar _isByteLength2 = _interopRequireDefault(_isByteLength);\n\nvar _isUUID = require('./lib/isUUID');\n\nvar _isUUID2 = _interopRequireDefault(_isUUID);\n\nvar _isMongoId = require('./lib/isMongoId');\n\nvar _isMongoId2 = _interopRequireDefault(_isMongoId);\n\nvar _isAfter = require('./lib/isAfter');\n\nvar _isAfter2 = _interopRequireDefault(_isAfter);\n\nvar _isBefore = require('./lib/isBefore');\n\nvar _isBefore2 = _interopRequireDefault(_isBefore);\n\nvar _isIn = require('./lib/isIn');\n\nvar _isIn2 = _interopRequireDefault(_isIn);\n\nvar _isCreditCard = require('./lib/isCreditCard');\n\nvar _isCreditCard2 = _interopRequireDefault(_isCreditCard);\n\nvar _isISIN = require('./lib/isISIN');\n\nvar _isISIN2 = _interopRequireDefault(_isISIN);\n\nvar _isISBN = require('./lib/isISBN');\n\nvar _isISBN2 = _interopRequireDefault(_isISBN);\n\nvar _isISSN = require('./lib/isISSN');\n\nvar _isISSN2 = _interopRequireDefault(_isISSN);\n\nvar _isMobilePhone = require('./lib/isMobilePhone');\n\nvar _isMobilePhone2 = _interopRequireDefault(_isMobilePhone);\n\nvar _isCurrency = require('./lib/isCurrency');\n\nvar _isCurrency2 = _interopRequireDefault(_isCurrency);\n\nvar _isISO = require('./lib/isISO8601');\n\nvar _isISO2 = _interopRequireDefault(_isISO);\n\nvar _isISO31661Alpha = require('./lib/isISO31661Alpha2');\n\nvar _isISO31661Alpha2 = _interopRequireDefault(_isISO31661Alpha);\n\nvar _isBase = require('./lib/isBase64');\n\nvar _isBase2 = _interopRequireDefault(_isBase);\n\nvar _isDataURI = require('./lib/isDataURI');\n\nvar _isDataURI2 = _interopRequireDefault(_isDataURI);\n\nvar _isMimeType = require('./lib/isMimeType');\n\nvar _isMimeType2 = _interopRequireDefault(_isMimeType);\n\nvar _isLatLong = require('./lib/isLatLong');\n\nvar _isLatLong2 = _interopRequireDefault(_isLatLong);\n\nvar _isPostalCode = require('./lib/isPostalCode');\n\nvar _isPostalCode2 = _interopRequireDefault(_isPostalCode);\n\nvar _ltrim = require('./lib/ltrim');\n\nvar _ltrim2 = _interopRequireDefault(_ltrim);\n\nvar _rtrim = require('./lib/rtrim');\n\nvar _rtrim2 = _interopRequireDefault(_rtrim);\n\nvar _trim = require('./lib/trim');\n\nvar _trim2 = _interopRequireDefault(_trim);\n\nvar _escape = require('./lib/escape');\n\nvar _escape2 = _interopRequireDefault(_escape);\n\nvar _unescape = require('./lib/unescape');\n\nvar _unescape2 = _interopRequireDefault(_unescape);\n\nvar _stripLow = require('./lib/stripLow');\n\nvar _stripLow2 = _interopRequireDefault(_stripLow);\n\nvar _whitelist = require('./lib/whitelist');\n\nvar _whitelist2 = _interopRequireDefault(_whitelist);\n\nvar _blacklist = require('./lib/blacklist');\n\nvar _blacklist2 = _interopRequireDefault(_blacklist);\n\nvar _isWhitelisted = require('./lib/isWhitelisted');\n\nvar _isWhitelisted2 = _interopRequireDefault(_isWhitelisted);\n\nvar _normalizeEmail = require('./lib/normalizeEmail');\n\nvar _normalizeEmail2 = _interopRequireDefault(_normalizeEmail);\n\nvar _toString = require('./lib/util/toString');\n\nvar _toString2 = _interopRequireDefault(_toString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar version = '9.2.0';\n\nvar validator = {\n  version: version,\n  toDate: _toDate2.default,\n  toFloat: _toFloat2.default,\n  toInt: _toInt2.default,\n  toBoolean: _toBoolean2.default,\n  equals: _equals2.default,\n  contains: _contains2.default,\n  matches: _matches2.default,\n  isEmail: _isEmail2.default,\n  isURL: _isURL2.default,\n  isMACAddress: _isMACAddress2.default,\n  isIP: _isIP2.default,\n  isFQDN: _isFQDN2.default,\n  isBoolean: _isBoolean2.default,\n  isAlpha: _isAlpha2.default,\n  isAlphanumeric: _isAlphanumeric2.default,\n  isNumeric: _isNumeric2.default,\n  isPort: _isPort2.default,\n  isLowercase: _isLowercase2.default,\n  isUppercase: _isUppercase2.default,\n  isAscii: _isAscii2.default,\n  isFullWidth: _isFullWidth2.default,\n  isHalfWidth: _isHalfWidth2.default,\n  isVariableWidth: _isVariableWidth2.default,\n  isMultibyte: _isMultibyte2.default,\n  isSurrogatePair: _isSurrogatePair2.default,\n  isInt: _isInt2.default,\n  isFloat: _isFloat2.default,\n  isDecimal: _isDecimal2.default,\n  isHexadecimal: _isHexadecimal2.default,\n  isDivisibleBy: _isDivisibleBy2.default,\n  isHexColor: _isHexColor2.default,\n  isISRC: _isISRC2.default,\n  isMD5: _isMD2.default,\n  isHash: _isHash2.default,\n  isJSON: _isJSON2.default,\n  isEmpty: _isEmpty2.default,\n  isLength: _isLength2.default,\n  isByteLength: _isByteLength2.default,\n  isUUID: _isUUID2.default,\n  isMongoId: _isMongoId2.default,\n  isAfter: _isAfter2.default,\n  isBefore: _isBefore2.default,\n  isIn: _isIn2.default,\n  isCreditCard: _isCreditCard2.default,\n  isISIN: _isISIN2.default,\n  isISBN: _isISBN2.default,\n  isISSN: _isISSN2.default,\n  isMobilePhone: _isMobilePhone2.default,\n  isPostalCode: _isPostalCode2.default,\n  isCurrency: _isCurrency2.default,\n  isISO8601: _isISO2.default,\n  isISO31661Alpha2: _isISO31661Alpha2.default,\n  isBase64: _isBase2.default,\n  isDataURI: _isDataURI2.default,\n  isMimeType: _isMimeType2.default,\n  isLatLong: _isLatLong2.default,\n  ltrim: _ltrim2.default,\n  rtrim: _rtrim2.default,\n  trim: _trim2.default,\n  escape: _escape2.default,\n  unescape: _unescape2.default,\n  stripLow: _stripLow2.default,\n  whitelist: _whitelist2.default,\n  blacklist: _blacklist2.default,\n  isWhitelisted: _isWhitelisted2.default,\n  normalizeEmail: _normalizeEmail2.default,\n  toString: _toString2.default\n};\n\nexports.default = validator;\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nvar alpha = exports.alpha = {\n  'en-US': /^[A-Z]+$/i,\n  'cs-CZ': /^[A-ZÁČĎÉĚÍŇÓŘŠŤÚŮÝŽ]+$/i,\n  'da-DK': /^[A-ZÆØÅ]+$/i,\n  'de-DE': /^[A-ZÄÖÜß]+$/i,\n  'el-GR': /^[Α-ω]+$/i,\n  'es-ES': /^[A-ZÁÉÍÑÓÚÜ]+$/i,\n  'fr-FR': /^[A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]+$/i,\n  'it-IT': /^[A-ZÀÉÈÌÎÓÒÙ]+$/i,\n  'nb-NO': /^[A-ZÆØÅ]+$/i,\n  'nl-NL': /^[A-ZÁÉËÏÓÖÜÚ]+$/i,\n  'nn-NO': /^[A-ZÆØÅ]+$/i,\n  'hu-HU': /^[A-ZÁÉÍÓÖŐÚÜŰ]+$/i,\n  'pl-PL': /^[A-ZĄĆĘŚŁŃÓŻŹ]+$/i,\n  'pt-PT': /^[A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,\n  'ru-RU': /^[А-ЯЁ]+$/i,\n  'sr-RS@latin': /^[A-ZČĆŽŠĐ]+$/i,\n  'sr-RS': /^[А-ЯЂЈЉЊЋЏ]+$/i,\n  'sv-SE': /^[A-ZÅÄÖ]+$/i,\n  'tr-TR': /^[A-ZÇĞİıÖŞÜ]+$/i,\n  'uk-UA': /^[А-ЩЬЮЯЄIЇҐі]+$/i,\n  ar: /^[ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/\n};\n\nvar alphanumeric = exports.alphanumeric = {\n  'en-US': /^[0-9A-Z]+$/i,\n  'cs-CZ': /^[0-9A-ZÁČĎÉĚÍŇÓŘŠŤÚŮÝŽ]+$/i,\n  'da-DK': /^[0-9A-ZÆØÅ]+$/i,\n  'de-DE': /^[0-9A-ZÄÖÜß]+$/i,\n  'el-GR': /^[0-9Α-ω]+$/i,\n  'es-ES': /^[0-9A-ZÁÉÍÑÓÚÜ]+$/i,\n  'fr-FR': /^[0-9A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]+$/i,\n  'it-IT': /^[0-9A-ZÀÉÈÌÎÓÒÙ]+$/i,\n  'hu-HU': /^[0-9A-ZÁÉÍÓÖŐÚÜŰ]+$/i,\n  'nb-NO': /^[0-9A-ZÆØÅ]+$/i,\n  'nl-NL': /^[0-9A-ZÁÉËÏÓÖÜÚ]+$/i,\n  'nn-NO': /^[0-9A-ZÆØÅ]+$/i,\n  'pl-PL': /^[0-9A-ZĄĆĘŚŁŃÓŻŹ]+$/i,\n  'pt-PT': /^[0-9A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i,\n  'ru-RU': /^[0-9А-ЯЁ]+$/i,\n  'sr-RS@latin': /^[0-9A-ZČĆŽŠĐ]+$/i,\n  'sr-RS': /^[0-9А-ЯЂЈЉЊЋЏ]+$/i,\n  'sv-SE': /^[0-9A-ZÅÄÖ]+$/i,\n  'tr-TR': /^[0-9A-ZÇĞİıÖŞÜ]+$/i,\n  'uk-UA': /^[0-9А-ЩЬЮЯЄIЇҐі]+$/i,\n  ar: /^[٠١٢٣٤٥٦٧٨٩0-9ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/\n};\n\nvar decimal = exports.decimal = {\n  'en-US': '.',\n  ar: '٫'\n};\n\nvar englishLocales = exports.englishLocales = ['AU', 'GB', 'HK', 'IN', 'NZ', 'ZA', 'ZM'];\n\nfor (var locale, i = 0; i < englishLocales.length; i++) {\n  locale = 'en-' + englishLocales[i];\n  alpha[locale] = alpha['en-US'];\n  alphanumeric[locale] = alphanumeric['en-US'];\n  decimal[locale] = decimal['en-US'];\n}\n\n// Source: http://www.localeplanet.com/java/\nvar arabicLocales = exports.arabicLocales = ['AE', 'BH', 'DZ', 'EG', 'IQ', 'JO', 'KW', 'LB', 'LY', 'MA', 'QM', 'QA', 'SA', 'SD', 'SY', 'TN', 'YE'];\n\nfor (var _locale, _i = 0; _i < arabicLocales.length; _i++) {\n  _locale = 'ar-' + arabicLocales[_i];\n  alpha[_locale] = alpha.ar;\n  alphanumeric[_locale] = alphanumeric.ar;\n  decimal[_locale] = decimal.ar;\n}\n\n// Source: https://en.wikipedia.org/wiki/Decimal_mark\nvar dotDecimal = exports.dotDecimal = [];\nvar commaDecimal = exports.commaDecimal = ['cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'es-ES', 'fr-FR', 'it-IT', 'hu-HU', 'nb-NO', 'nn-NO', 'nl-NL', 'pl-Pl', 'pt-PT', 'ru-RU', 'sr-RS@latin', 'sr-RS', 'sv-SE', 'tr-TR', 'uk-UA'];\n\nfor (var _i2 = 0; _i2 < dotDecimal.length; _i2++) {\n  decimal[dotDecimal[_i2]] = decimal['en-US'];\n}\n\nfor (var _i3 = 0; _i3 < commaDecimal.length; _i3++) {\n  decimal[commaDecimal[_i3]] = ',';\n}\n\nalpha['pt-BR'] = alpha['pt-PT'];\nalphanumeric['pt-BR'] = alphanumeric['pt-PT'];\ndecimal['pt-BR'] = decimal['pt-PT'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = blacklist;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction blacklist(str, chars) {\n  (0, _assertString2.default)(str);\n  return str.replace(new RegExp('[' + chars + ']+', 'g'), '');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = contains;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _toString = require('./util/toString');\n\nvar _toString2 = _interopRequireDefault(_toString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction contains(str, elem) {\n  (0, _assertString2.default)(str);\n  return str.indexOf((0, _toString2.default)(elem)) >= 0;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = equals;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction equals(str, comparison) {\n  (0, _assertString2.default)(str);\n  return str === comparison;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = escape;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction escape(str) {\n  (0, _assertString2.default)(str);\n  return str.replace(/&/g, '&amp;').replace(/\"/g, '&quot;').replace(/'/g, '&#x27;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\\//g, '&#x2F;').replace(/\\\\/g, '&#x5C;').replace(/`/g, '&#96;');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isAfter;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _toDate = require('./toDate');\n\nvar _toDate2 = _interopRequireDefault(_toDate);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isAfter(str) {\n  var date = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : String(new Date());\n\n  (0, _assertString2.default)(str);\n  var comparison = (0, _toDate2.default)(date);\n  var original = (0, _toDate2.default)(str);\n  return !!(original && comparison && original > comparison);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isAlpha;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _alpha = require('./alpha');\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isAlpha(str) {\n  var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'en-US';\n\n  (0, _assertString2.default)(str);\n  if (locale in _alpha.alpha) {\n    return _alpha.alpha[locale].test(str);\n  }\n  throw new Error('Invalid locale \\'' + locale + '\\'');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isAlphanumeric;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _alpha = require('./alpha');\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isAlphanumeric(str) {\n  var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'en-US';\n\n  (0, _assertString2.default)(str);\n  if (locale in _alpha.alphanumeric) {\n    return _alpha.alphanumeric[locale].test(str);\n  }\n  throw new Error('Invalid locale \\'' + locale + '\\'');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isAscii;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/* eslint-disable no-control-regex */\nvar ascii = /^[\\x00-\\x7F]+$/;\n/* eslint-enable no-control-regex */\n\nfunction isAscii(str) {\n  (0, _assertString2.default)(str);\n  return ascii.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isBase64;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar notBase64 = /[^A-Z0-9+\\/=]/i;\n\nfunction isBase64(str) {\n  (0, _assertString2.default)(str);\n  var len = str.length;\n  if (!len || len % 4 !== 0 || notBase64.test(str)) {\n    return false;\n  }\n  var firstPaddingChar = str.indexOf('=');\n  return firstPaddingChar === -1 || firstPaddingChar === len - 1 || firstPaddingChar === len - 2 && str[len - 1] === '=';\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isBefore;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _toDate = require('./toDate');\n\nvar _toDate2 = _interopRequireDefault(_toDate);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isBefore(str) {\n  var date = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : String(new Date());\n\n  (0, _assertString2.default)(str);\n  var comparison = (0, _toDate2.default)(date);\n  var original = (0, _toDate2.default)(str);\n  return !!(original && comparison && original < comparison);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isBoolean;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isBoolean(str) {\n  (0, _assertString2.default)(str);\n  return ['true', 'false', '1', '0'].indexOf(str) >= 0;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.default = isByteLength;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/* eslint-disable prefer-rest-params */\nfunction isByteLength(str, options) {\n  (0, _assertString2.default)(str);\n  var min = void 0;\n  var max = void 0;\n  if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) === 'object') {\n    min = options.min || 0;\n    max = options.max;\n  } else {\n    // backwards compatibility: isByteLength(str, min [, max])\n    min = arguments[1];\n    max = arguments[2];\n  }\n  var len = encodeURI(str).split(/%..|./).length - 1;\n  return len >= min && (typeof max === 'undefined' || len <= max);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isCreditCard;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/* eslint-disable max-len */\nvar creditCard = /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\\d{3})\\d{11}|62[0-9]{14})$/;\n/* eslint-enable max-len */\n\nfunction isCreditCard(str) {\n  (0, _assertString2.default)(str);\n  var sanitized = str.replace(/[- ]+/g, '');\n  if (!creditCard.test(sanitized)) {\n    return false;\n  }\n  var sum = 0;\n  var digit = void 0;\n  var tmpNum = void 0;\n  var shouldDouble = void 0;\n  for (var i = sanitized.length - 1; i >= 0; i--) {\n    digit = sanitized.substring(i, i + 1);\n    tmpNum = parseInt(digit, 10);\n    if (shouldDouble) {\n      tmpNum *= 2;\n      if (tmpNum >= 10) {\n        sum += tmpNum % 10 + 1;\n      } else {\n        sum += tmpNum;\n      }\n    } else {\n      sum += tmpNum;\n    }\n    shouldDouble = !shouldDouble;\n  }\n  return !!(sum % 10 === 0 ? sanitized : false);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isCurrency;\n\nvar _merge = require('./util/merge');\n\nvar _merge2 = _interopRequireDefault(_merge);\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction currencyRegex(options) {\n  var decimal_digits = '\\\\d{' + options.digits_after_decimal[0] + '}';\n  options.digits_after_decimal.forEach(function (digit, index) {\n    if (index !== 0) decimal_digits = decimal_digits + '|\\\\d{' + digit + '}';\n  });\n  var symbol = '(\\\\' + options.symbol.replace(/\\./g, '\\\\.') + ')' + (options.require_symbol ? '' : '?'),\n      negative = '-?',\n      whole_dollar_amount_without_sep = '[1-9]\\\\d*',\n      whole_dollar_amount_with_sep = '[1-9]\\\\d{0,2}(\\\\' + options.thousands_separator + '\\\\d{3})*',\n      valid_whole_dollar_amounts = ['0', whole_dollar_amount_without_sep, whole_dollar_amount_with_sep],\n      whole_dollar_amount = '(' + valid_whole_dollar_amounts.join('|') + ')?',\n      decimal_amount = '(\\\\' + options.decimal_separator + '(' + decimal_digits + '))' + (options.require_decimal ? '' : '?');\n  var pattern = whole_dollar_amount + (options.allow_decimal || options.require_decimal ? decimal_amount : '');\n\n  // default is negative sign before symbol, but there are two other options (besides parens)\n  if (options.allow_negatives && !options.parens_for_negatives) {\n    if (options.negative_sign_after_digits) {\n      pattern += negative;\n    } else if (options.negative_sign_before_digits) {\n      pattern = negative + pattern;\n    }\n  }\n\n  // South African Rand, for example, uses R 123 (space) and R-123 (no space)\n  if (options.allow_negative_sign_placeholder) {\n    pattern = '( (?!\\\\-))?' + pattern;\n  } else if (options.allow_space_after_symbol) {\n    pattern = ' ?' + pattern;\n  } else if (options.allow_space_after_digits) {\n    pattern += '( (?!$))?';\n  }\n\n  if (options.symbol_after_digits) {\n    pattern += symbol;\n  } else {\n    pattern = symbol + pattern;\n  }\n\n  if (options.allow_negatives) {\n    if (options.parens_for_negatives) {\n      pattern = '(\\\\(' + pattern + '\\\\)|' + pattern + ')';\n    } else if (!(options.negative_sign_before_digits || options.negative_sign_after_digits)) {\n      pattern = negative + pattern;\n    }\n  }\n\n  // ensure there's a dollar and/or decimal amount, and that\n  // it doesn't start with a space or a negative sign followed by a space\n  return new RegExp('^(?!-? )(?=.*\\\\d)' + pattern + '$');\n}\n\nvar default_currency_options = {\n  symbol: '$',\n  require_symbol: false,\n  allow_space_after_symbol: false,\n  symbol_after_digits: false,\n  allow_negatives: true,\n  parens_for_negatives: false,\n  negative_sign_before_digits: false,\n  negative_sign_after_digits: false,\n  allow_negative_sign_placeholder: false,\n  thousands_separator: ',',\n  decimal_separator: '.',\n  allow_decimal: true,\n  require_decimal: false,\n  digits_after_decimal: [2],\n  allow_space_after_digits: false\n};\n\nfunction isCurrency(str, options) {\n  (0, _assertString2.default)(str);\n  options = (0, _merge2.default)(options, default_currency_options);\n  return currencyRegex(options).test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isDataURI;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar dataURI = /^\\s*data:([a-z]+\\/[a-z0-9\\-\\+]+(;[a-z\\-]+=[a-z0-9\\-]+)?)?(;base64)?,[a-z0-9!\\$&',\\(\\)\\*\\+,;=\\-\\._~:@\\/\\?%\\s]*\\s*$/i; // eslint-disable-line max-len\n\nfunction isDataURI(str) {\n  (0, _assertString2.default)(str);\n  return dataURI.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isDecimal;\n\nvar _merge = require('./util/merge');\n\nvar _merge2 = _interopRequireDefault(_merge);\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _alpha = require('./alpha');\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction decimalRegExp(options) {\n  var regExp = new RegExp('^[-+]?([0-9]+)?(\\\\' + _alpha.decimal[options.locale] + '[0-9]{' + options.decimal_digits + '})' + (options.force_decimal ? '' : '?') + '$');\n  return regExp;\n}\n\nvar default_decimal_options = {\n  force_decimal: false,\n  decimal_digits: '1,',\n  locale: 'en-US'\n};\n\nvar blacklist = ['', '-', '+'];\n\nfunction isDecimal(str, options) {\n  (0, _assertString2.default)(str);\n  options = (0, _merge2.default)(options, default_decimal_options);\n  if (options.locale in _alpha.decimal) {\n    return !blacklist.includes(str.replace(/ /g, '')) && decimalRegExp(options).test(str);\n  }\n  throw new Error('Invalid locale \\'' + options.locale + '\\'');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isDivisibleBy;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _toFloat = require('./toFloat');\n\nvar _toFloat2 = _interopRequireDefault(_toFloat);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isDivisibleBy(str, num) {\n  (0, _assertString2.default)(str);\n  return (0, _toFloat2.default)(str) % parseInt(num, 10) === 0;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isEmail;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _merge = require('./util/merge');\n\nvar _merge2 = _interopRequireDefault(_merge);\n\nvar _isByteLength = require('./isByteLength');\n\nvar _isByteLength2 = _interopRequireDefault(_isByteLength);\n\nvar _isFQDN = require('./isFQDN');\n\nvar _isFQDN2 = _interopRequireDefault(_isFQDN);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar default_email_options = {\n  allow_display_name: false,\n  require_display_name: false,\n  allow_utf8_local_part: true,\n  require_tld: true\n};\n\n/* eslint-disable max-len */\n/* eslint-disable no-control-regex */\nvar displayName = /^[a-z\\d!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~\\.\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF]+[a-z\\d!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~\\,\\.\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF\\s]*<(.+)>$/i;\nvar emailUserPart = /^[a-z\\d!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~]+$/i;\nvar quotedEmailUser = /^([\\s\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x7f\\x21\\x23-\\x5b\\x5d-\\x7e]|(\\\\[\\x01-\\x09\\x0b\\x0c\\x0d-\\x7f]))*$/i;\nvar emailUserUtf8Part = /^[a-z\\d!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF]+$/i;\nvar quotedEmailUserUtf8 = /^([\\s\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x7f\\x21\\x23-\\x5b\\x5d-\\x7e\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF]|(\\\\[\\x01-\\x09\\x0b\\x0c\\x0d-\\x7f\\u00A0-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFEF]))*$/i;\n/* eslint-enable max-len */\n/* eslint-enable no-control-regex */\n\nfunction isEmail(str, options) {\n  (0, _assertString2.default)(str);\n  options = (0, _merge2.default)(options, default_email_options);\n\n  if (options.require_display_name || options.allow_display_name) {\n    var display_email = str.match(displayName);\n    if (display_email) {\n      str = display_email[1];\n    } else if (options.require_display_name) {\n      return false;\n    }\n  }\n\n  var parts = str.split('@');\n  var domain = parts.pop();\n  var user = parts.join('@');\n\n  var lower_domain = domain.toLowerCase();\n  if (lower_domain === 'gmail.com' || lower_domain === 'googlemail.com') {\n    user = user.replace(/\\./g, '').toLowerCase();\n  }\n\n  if (!(0, _isByteLength2.default)(user, { max: 64 }) || !(0, _isByteLength2.default)(domain, { max: 254 })) {\n    return false;\n  }\n\n  if (!(0, _isFQDN2.default)(domain, { require_tld: options.require_tld })) {\n    return false;\n  }\n\n  if (user[0] === '\"') {\n    user = user.slice(1, user.length - 1);\n    return options.allow_utf8_local_part ? quotedEmailUserUtf8.test(user) : quotedEmailUser.test(user);\n  }\n\n  var pattern = options.allow_utf8_local_part ? emailUserUtf8Part : emailUserPart;\n\n  var user_parts = user.split('.');\n  for (var i = 0; i < user_parts.length; i++) {\n    if (!pattern.test(user_parts[i])) {\n      return false;\n    }\n  }\n\n  return true;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isEmpty;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isEmpty(str) {\n  (0, _assertString2.default)(str);\n  return str.length === 0;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isFQDN;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _merge = require('./util/merge');\n\nvar _merge2 = _interopRequireDefault(_merge);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar default_fqdn_options = {\n  require_tld: true,\n  allow_underscores: false,\n  allow_trailing_dot: false\n};\n\nfunction isFQDN(str, options) {\n  (0, _assertString2.default)(str);\n  options = (0, _merge2.default)(options, default_fqdn_options);\n\n  /* Remove the optional trailing dot before checking validity */\n  if (options.allow_trailing_dot && str[str.length - 1] === '.') {\n    str = str.substring(0, str.length - 1);\n  }\n  var parts = str.split('.');\n  if (options.require_tld) {\n    var tld = parts.pop();\n    if (!parts.length || !/^([a-z\\u00a1-\\uffff]{2,}|xn[a-z0-9-]{2,})$/i.test(tld)) {\n      return false;\n    }\n    // disallow spaces\n    if (/[\\s\\u2002-\\u200B\\u202F\\u205F\\u3000\\uFEFF\\uDB40\\uDC20]/.test(tld)) {\n      return false;\n    }\n  }\n  for (var part, i = 0; i < parts.length; i++) {\n    part = parts[i];\n    if (options.allow_underscores) {\n      part = part.replace(/_/g, '');\n    }\n    if (!/^[a-z\\u00a1-\\uffff0-9-]+$/i.test(part)) {\n      return false;\n    }\n    // disallow full-width chars\n    if (/[\\uff01-\\uff5e]/.test(part)) {\n      return false;\n    }\n    if (part[0] === '-' || part[part.length - 1] === '-') {\n      return false;\n    }\n  }\n  return true;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isFloat;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _alpha = require('./alpha');\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isFloat(str, options) {\n  (0, _assertString2.default)(str);\n  options = options || {};\n  var float = new RegExp('^(?:[-+])?(?:[0-9]+)?(?:\\\\' + (options.locale ? _alpha.decimal[options.locale] : '.') + '[0-9]*)?(?:[eE][\\\\+\\\\-]?(?:[0-9]+))?$');\n  if (str === '' || str === '.' || str === '-' || str === '+') {\n    return false;\n  }\n  return float.test(str) && (!options.hasOwnProperty('min') || str >= options.min) && (!options.hasOwnProperty('max') || str <= options.max) && (!options.hasOwnProperty('lt') || str < options.lt) && (!options.hasOwnProperty('gt') || str > options.gt);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.fullWidth = undefined;\nexports.default = isFullWidth;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar fullWidth = exports.fullWidth = /[^\\u0020-\\u007E\\uFF61-\\uFF9F\\uFFA0-\\uFFDC\\uFFE8-\\uFFEE0-9a-zA-Z]/;\n\nfunction isFullWidth(str) {\n  (0, _assertString2.default)(str);\n  return fullWidth.test(str);\n}","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.halfWidth = undefined;\nexports.default = isHalfWidth;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar halfWidth = exports.halfWidth = /[\\u0020-\\u007E\\uFF61-\\uFF9F\\uFFA0-\\uFFDC\\uFFE8-\\uFFEE0-9a-zA-Z]/;\n\nfunction isHalfWidth(str) {\n  (0, _assertString2.default)(str);\n  return halfWidth.test(str);\n}","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isHash;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar lengths = {\n  md5: 32,\n  md4: 32,\n  sha1: 40,\n  sha256: 64,\n  sha384: 96,\n  sha512: 128,\n  ripemd128: 32,\n  ripemd160: 40,\n  tiger128: 32,\n  tiger160: 40,\n  tiger192: 48,\n  crc32: 8,\n  crc32b: 8\n};\n\nfunction isHash(str, algorithm) {\n  (0, _assertString2.default)(str);\n  var hash = new RegExp('^[a-f0-9]{' + lengths[algorithm] + '}$');\n  return hash.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isHexColor;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar hexcolor = /^#?([0-9A-F]{3}|[0-9A-F]{6})$/i;\n\nfunction isHexColor(str) {\n  (0, _assertString2.default)(str);\n  return hexcolor.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isHexadecimal;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar hexadecimal = /^[0-9A-F]+$/i;\n\nfunction isHexadecimal(str) {\n  (0, _assertString2.default)(str);\n  return hexadecimal.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isIP;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar ipv4Maybe = /^(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})$/;\nvar ipv6Block = /^[0-9A-F]{1,4}$/i;\n\nfunction isIP(str) {\n  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';\n\n  (0, _assertString2.default)(str);\n  version = String(version);\n  if (!version) {\n    return isIP(str, 4) || isIP(str, 6);\n  } else if (version === '4') {\n    if (!ipv4Maybe.test(str)) {\n      return false;\n    }\n    var parts = str.split('.').sort(function (a, b) {\n      return a - b;\n    });\n    return parts[3] <= 255;\n  } else if (version === '6') {\n    var blocks = str.split(':');\n    var foundOmissionBlock = false; // marker to indicate ::\n\n    // At least some OS accept the last 32 bits of an IPv6 address\n    // (i.e. 2 of the blocks) in IPv4 notation, and RFC 3493 says\n    // that '::ffff:a.b.c.d' is valid for IPv4-mapped IPv6 addresses,\n    // and '::a.b.c.d' is deprecated, but also valid.\n    var foundIPv4TransitionBlock = isIP(blocks[blocks.length - 1], 4);\n    var expectedNumberOfBlocks = foundIPv4TransitionBlock ? 7 : 8;\n\n    if (blocks.length > expectedNumberOfBlocks) {\n      return false;\n    }\n    // initial or final ::\n    if (str === '::') {\n      return true;\n    } else if (str.substr(0, 2) === '::') {\n      blocks.shift();\n      blocks.shift();\n      foundOmissionBlock = true;\n    } else if (str.substr(str.length - 2) === '::') {\n      blocks.pop();\n      blocks.pop();\n      foundOmissionBlock = true;\n    }\n\n    for (var i = 0; i < blocks.length; ++i) {\n      // test for a :: which can not be at the string start/end\n      // since those cases have been handled above\n      if (blocks[i] === '' && i > 0 && i < blocks.length - 1) {\n        if (foundOmissionBlock) {\n          return false; // multiple :: in address\n        }\n        foundOmissionBlock = true;\n      } else if (foundIPv4TransitionBlock && i === blocks.length - 1) {\n        // it has been checked before that the last\n        // block is a valid IPv4 address\n      } else if (!ipv6Block.test(blocks[i])) {\n        return false;\n      }\n    }\n    if (foundOmissionBlock) {\n      return blocks.length >= 1;\n    }\n    return blocks.length === expectedNumberOfBlocks;\n  }\n  return false;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isISBN;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar isbn10Maybe = /^(?:[0-9]{9}X|[0-9]{10})$/;\nvar isbn13Maybe = /^(?:[0-9]{13})$/;\nvar factor = [1, 3];\n\nfunction isISBN(str) {\n  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';\n\n  (0, _assertString2.default)(str);\n  version = String(version);\n  if (!version) {\n    return isISBN(str, 10) || isISBN(str, 13);\n  }\n  var sanitized = str.replace(/[\\s-]+/g, '');\n  var checksum = 0;\n  var i = void 0;\n  if (version === '10') {\n    if (!isbn10Maybe.test(sanitized)) {\n      return false;\n    }\n    for (i = 0; i < 9; i++) {\n      checksum += (i + 1) * sanitized.charAt(i);\n    }\n    if (sanitized.charAt(9) === 'X') {\n      checksum += 10 * 10;\n    } else {\n      checksum += 10 * sanitized.charAt(9);\n    }\n    if (checksum % 11 === 0) {\n      return !!sanitized;\n    }\n  } else if (version === '13') {\n    if (!isbn13Maybe.test(sanitized)) {\n      return false;\n    }\n    for (i = 0; i < 12; i++) {\n      checksum += factor[i % 2] * sanitized.charAt(i);\n    }\n    if (sanitized.charAt(12) - (10 - checksum % 10) % 10 === 0) {\n      return !!sanitized;\n    }\n  }\n  return false;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isISIN;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar isin = /^[A-Z]{2}[0-9A-Z]{9}[0-9]$/;\n\nfunction isISIN(str) {\n  (0, _assertString2.default)(str);\n  if (!isin.test(str)) {\n    return false;\n  }\n\n  var checksumStr = str.replace(/[A-Z]/g, function (character) {\n    return parseInt(character, 36);\n  });\n\n  var sum = 0;\n  var digit = void 0;\n  var tmpNum = void 0;\n  var shouldDouble = true;\n  for (var i = checksumStr.length - 2; i >= 0; i--) {\n    digit = checksumStr.substring(i, i + 1);\n    tmpNum = parseInt(digit, 10);\n    if (shouldDouble) {\n      tmpNum *= 2;\n      if (tmpNum >= 10) {\n        sum += tmpNum + 1;\n      } else {\n        sum += tmpNum;\n      }\n    } else {\n      sum += tmpNum;\n    }\n    shouldDouble = !shouldDouble;\n  }\n\n  return parseInt(str.substr(str.length - 1), 10) === (10000 - sum) % 10;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isISO31661Alpha2;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n// from https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2\nvar validISO31661Alpha2CountriesCodes = ['AD', 'AE', 'AF', 'AG', 'AI', 'AL', 'AM', 'AO', 'AQ', 'AR', 'AS', 'AT', 'AU', 'AW', 'AX', 'AZ', 'BA', 'BB', 'BD', 'BE', 'BF', 'BG', 'BH', 'BI', 'BJ', 'BL', 'BM', 'BN', 'BO', 'BQ', 'BR', 'BS', 'BT', 'BV', 'BW', 'BY', 'BZ', 'CA', 'CC', 'CD', 'CF', 'CG', 'CH', 'CI', 'CK', 'CL', 'CM', 'CN', 'CO', 'CR', 'CU', 'CV', 'CW', 'CX', 'CY', 'CZ', 'DE', 'DJ', 'DK', 'DM', 'DO', 'DZ', 'EC', 'EE', 'EG', 'EH', 'ER', 'ES', 'ET', 'FI', 'FJ', 'FK', 'FM', 'FO', 'FR', 'GA', 'GB', 'GD', 'GE', 'GF', 'GG', 'GH', 'GI', 'GL', 'GM', 'GN', 'GP', 'GQ', 'GR', 'GS', 'GT', 'GU', 'GW', 'GY', 'HK', 'HM', 'HN', 'HR', 'HT', 'HU', 'ID', 'IE', 'IL', 'IM', 'IN', 'IO', 'IQ', 'IR', 'IS', 'IT', 'JE', 'JM', 'JO', 'JP', 'KE', 'KG', 'KH', 'KI', 'KM', 'KN', 'KP', 'KR', 'KW', 'KY', 'KZ', 'LA', 'LB', 'LC', 'LI', 'LK', 'LR', 'LS', 'LT', 'LU', 'LV', 'LY', 'MA', 'MC', 'MD', 'ME', 'MF', 'MG', 'MH', 'MK', 'ML', 'MM', 'MN', 'MO', 'MP', 'MQ', 'MR', 'MS', 'MT', 'MU', 'MV', 'MW', 'MX', 'MY', 'MZ', 'NA', 'NC', 'NE', 'NF', 'NG', 'NI', 'NL', 'NO', 'NP', 'NR', 'NU', 'NZ', 'OM', 'PA', 'PE', 'PF', 'PG', 'PH', 'PK', 'PL', 'PM', 'PN', 'PR', 'PS', 'PT', 'PW', 'PY', 'QA', 'RE', 'RO', 'RS', 'RU', 'RW', 'SA', 'SB', 'SC', 'SD', 'SE', 'SG', 'SH', 'SI', 'SJ', 'SK', 'SL', 'SM', 'SN', 'SO', 'SR', 'SS', 'ST', 'SV', 'SX', 'SY', 'SZ', 'TC', 'TD', 'TF', 'TG', 'TH', 'TJ', 'TK', 'TL', 'TM', 'TN', 'TO', 'TR', 'TT', 'TV', 'TW', 'TZ', 'UA', 'UG', 'UM', 'US', 'UY', 'UZ', 'VA', 'VC', 'VE', 'VG', 'VI', 'VN', 'VU', 'WF', 'WS', 'YE', 'YT', 'ZA', 'ZM', 'ZW'];\n\nfunction isISO31661Alpha2(str) {\n  (0, _assertString2.default)(str);\n  return validISO31661Alpha2CountriesCodes.includes(str.toUpperCase());\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isISO8601;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/* eslint-disable max-len */\n// from http://goo.gl/0ejHHW\nvar iso8601 = /^([\\+-]?\\d{4}(?!\\d{2}\\b))((-?)((0[1-9]|1[0-2])(\\3([12]\\d|0[1-9]|3[01]))?|W([0-4]\\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\\d|[12]\\d{2}|3([0-5]\\d|6[1-6])))([T\\s]((([01]\\d|2[0-3])((:?)[0-5]\\d)?|24:?00)([\\.,]\\d+(?!:))?)?(\\17[0-5]\\d([\\.,]\\d+)?)?([zZ]|([\\+-])([01]\\d|2[0-3]):?([0-5]\\d)?)?)?)?$/;\n/* eslint-enable max-len */\n\nfunction isISO8601(str) {\n  (0, _assertString2.default)(str);\n  return iso8601.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isISRC;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n// see http://isrc.ifpi.org/en/isrc-standard/code-syntax\nvar isrc = /^[A-Z]{2}[0-9A-Z]{3}\\d{2}\\d{5}$/;\n\nfunction isISRC(str) {\n  (0, _assertString2.default)(str);\n  return isrc.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isISSN;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar issn = '^\\\\d{4}-?\\\\d{3}[\\\\dX]$';\n\nfunction isISSN(str) {\n  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n  (0, _assertString2.default)(str);\n  var testIssn = issn;\n  testIssn = options.require_hyphen ? testIssn.replace('?', '') : testIssn;\n  testIssn = options.case_sensitive ? new RegExp(testIssn) : new RegExp(testIssn, 'i');\n  if (!testIssn.test(str)) {\n    return false;\n  }\n  var issnDigits = str.replace('-', '');\n  var position = 8;\n  var checksum = 0;\n  var _iteratorNormalCompletion = true;\n  var _didIteratorError = false;\n  var _iteratorError = undefined;\n\n  try {\n    for (var _iterator = issnDigits[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n      var digit = _step.value;\n\n      var digitValue = digit.toUpperCase() === 'X' ? 10 : +digit;\n      checksum += digitValue * position;\n      --position;\n    }\n  } catch (err) {\n    _didIteratorError = true;\n    _iteratorError = err;\n  } finally {\n    try {\n      if (!_iteratorNormalCompletion && _iterator.return) {\n        _iterator.return();\n      }\n    } finally {\n      if (_didIteratorError) {\n        throw _iteratorError;\n      }\n    }\n  }\n\n  return checksum % 11 === 0;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.default = isIn;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _toString = require('./util/toString');\n\nvar _toString2 = _interopRequireDefault(_toString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isIn(str, options) {\n  (0, _assertString2.default)(str);\n  var i = void 0;\n  if (Object.prototype.toString.call(options) === '[object Array]') {\n    var array = [];\n    for (i in options) {\n      if ({}.hasOwnProperty.call(options, i)) {\n        array[i] = (0, _toString2.default)(options[i]);\n      }\n    }\n    return array.indexOf(str) >= 0;\n  } else if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) === 'object') {\n    return options.hasOwnProperty(str);\n  } else if (options && typeof options.indexOf === 'function') {\n    return options.indexOf(str) >= 0;\n  }\n  return false;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isInt;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar int = /^(?:[-+]?(?:0|[1-9][0-9]*))$/;\nvar intLeadingZeroes = /^[-+]?[0-9]+$/;\n\nfunction isInt(str, options) {\n  (0, _assertString2.default)(str);\n  options = options || {};\n\n  // Get the regex to use for testing, based on whether\n  // leading zeroes are allowed or not.\n  var regex = options.hasOwnProperty('allow_leading_zeroes') && !options.allow_leading_zeroes ? int : intLeadingZeroes;\n\n  // Check min/max/lt/gt\n  var minCheckPassed = !options.hasOwnProperty('min') || str >= options.min;\n  var maxCheckPassed = !options.hasOwnProperty('max') || str <= options.max;\n  var ltCheckPassed = !options.hasOwnProperty('lt') || str < options.lt;\n  var gtCheckPassed = !options.hasOwnProperty('gt') || str > options.gt;\n\n  return regex.test(str) && minCheckPassed && maxCheckPassed && ltCheckPassed && gtCheckPassed;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.default = isJSON;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isJSON(str) {\n  (0, _assertString2.default)(str);\n  try {\n    var obj = JSON.parse(str);\n    return !!obj && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object';\n  } catch (e) {/* ignore */}\n  return false;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nexports.default = function (str) {\n  (0, _assertString2.default)(str);\n  if (!str.includes(',')) return false;\n  var pair = str.split(',');\n  return lat.test(pair[0]) && long.test(pair[1]);\n};\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar lat = /^\\(?[+-]?(90(\\.0+)?|[1-8]?\\d(\\.\\d+)?)$/;\nvar long = /^\\s?[+-]?(180(\\.0+)?|1[0-7]\\d(\\.\\d+)?|\\d{1,2}(\\.\\d+)?)\\)?$/;\n\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.default = isLength;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/* eslint-disable prefer-rest-params */\nfunction isLength(str, options) {\n  (0, _assertString2.default)(str);\n  var min = void 0;\n  var max = void 0;\n  if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) === 'object') {\n    min = options.min || 0;\n    max = options.max;\n  } else {\n    // backwards compatibility: isLength(str, min [, max])\n    min = arguments[1];\n    max = arguments[2];\n  }\n  var surrogatePairs = str.match(/[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]/g) || [];\n  var len = str.length - surrogatePairs.length;\n  return len >= min && (typeof max === 'undefined' || len <= max);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isLowercase;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isLowercase(str) {\n  (0, _assertString2.default)(str);\n  return str === str.toLowerCase();\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isMACAddress;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar macAddress = /^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$/;\n\nfunction isMACAddress(str) {\n  (0, _assertString2.default)(str);\n  return macAddress.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isMD5;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar md5 = /^[a-f0-9]{32}$/;\n\nfunction isMD5(str) {\n  (0, _assertString2.default)(str);\n  return md5.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isMimeType;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/*\n  Checks if the provided string matches to a correct Media type format (MIME type)\n\n  This function only checks is the string format follows the\n  etablished rules by the according RFC specifications.\n  This function supports 'charset' in textual media types\n  (https://tools.ietf.org/html/rfc6657).\n\n  This function does not check against all the media types listed\n  by the IANA (https://www.iana.org/assignments/media-types/media-types.xhtml)\n  because of lightness purposes : it would require to include\n  all these MIME types in this librairy, which would weigh it\n  significantly. This kind of effort maybe is not worth for the use that\n  this function has in this entire librairy.\n\n  More informations in the RFC specifications :\n  - https://tools.ietf.org/html/rfc2045\n  - https://tools.ietf.org/html/rfc2046\n  - https://tools.ietf.org/html/rfc7231#section-3.1.1.1\n  - https://tools.ietf.org/html/rfc7231#section-3.1.1.5\n*/\n\n// Match simple MIME types\n// NB :\n//   Subtype length must not exceed 100 characters.\n//   This rule does not comply to the RFC specs (what is the max length ?).\nvar mimeTypeSimple = /^(application|audio|font|image|message|model|multipart|text|video)\\/[a-zA-Z0-9\\.\\-\\+]{1,100}$/i; // eslint-disable-line max-len\n\n// Handle \"charset\" in \"text/*\"\nvar mimeTypeText = /^text\\/[a-zA-Z0-9\\.\\-\\+]{1,100};\\s?charset=(\"[a-zA-Z0-9\\.\\-\\+\\s]{0,70}\"|[a-zA-Z0-9\\.\\-\\+]{0,70})(\\s?\\([a-zA-Z0-9\\.\\-\\+\\s]{1,20}\\))?$/i; // eslint-disable-line max-len\n\n// Handle \"boundary\" in \"multipart/*\"\nvar mimeTypeMultipart = /^multipart\\/[a-zA-Z0-9\\.\\-\\+]{1,100}(;\\s?(boundary|charset)=(\"[a-zA-Z0-9\\.\\-\\+\\s]{0,70}\"|[a-zA-Z0-9\\.\\-\\+]{0,70})(\\s?\\([a-zA-Z0-9\\.\\-\\+\\s]{1,20}\\))?){0,2}$/i; // eslint-disable-line max-len\n\nfunction isMimeType(str) {\n  (0, _assertString2.default)(str);\n  return mimeTypeSimple.test(str) || mimeTypeText.test(str) || mimeTypeMultipart.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isMobilePhone;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/* eslint-disable max-len */\nvar phones = {\n  'ar-AE': /^((\\+?971)|0)?5[024568]\\d{7}$/,\n  'ar-DZ': /^(\\+?213|0)(5|6|7)\\d{8}$/,\n  'ar-EG': /^((\\+?20)|0)?1[012]\\d{8}$/,\n  'ar-JO': /^(\\+?962|0)?7[789]\\d{7}$/,\n  'ar-SA': /^(!?(\\+?966)|0)?5\\d{8}$/,\n  'ar-SY': /^(!?(\\+?963)|0)?9\\d{8}$/,\n  'cs-CZ': /^(\\+?420)? ?[1-9][0-9]{2} ?[0-9]{3} ?[0-9]{3}$/,\n  'da-DK': /^(\\+?45)?\\s?\\d{2}\\s?\\d{2}\\s?\\d{2}\\s?\\d{2}$/,\n  'de-DE': /^(\\+?49[ \\.\\-])?([\\(]{1}[0-9]{1,6}[\\)])?([0-9 \\.\\-\\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/,\n  'el-GR': /^(\\+?30|0)?(69\\d{8})$/,\n  'en-AU': /^(\\+?61|0)4\\d{8}$/,\n  'en-GB': /^(\\+?44|0)7\\d{9}$/,\n  'en-HK': /^(\\+?852\\-?)?[456789]\\d{3}\\-?\\d{4}$/,\n  'en-IN': /^(\\+?91|0)?[789]\\d{9}$/,\n  'en-KE': /^(\\+?254|0)?[7]\\d{8}$/,\n  'en-NG': /^(\\+?234|0)?[789]\\d{9}$/,\n  'en-NZ': /^(\\+?64|0)2\\d{7,9}$/,\n  'en-PK': /^((\\+92)|(0092))-{0,1}\\d{3}-{0,1}\\d{7}$|^\\d{11}$|^\\d{4}-\\d{7}$/,\n  'en-RW': /^(\\+?250|0)?[7]\\d{8}$/,\n  'en-SG': /^(\\+65)?[89]\\d{7}$/,\n  'en-TZ': /^(\\+?255|0)?[67]\\d{8}$/,\n  'en-UG': /^(\\+?256|0)?[7]\\d{8}$/,\n  'en-US': /^(\\+?1)?[2-9]\\d{2}[2-9](?!11)\\d{6}$/,\n  'en-ZA': /^(\\+?27|0)\\d{9}$/,\n  'en-ZM': /^(\\+?26)?09[567]\\d{7}$/,\n  'es-ES': /^(\\+?34)?(6\\d{1}|7[1234])\\d{7}$/,\n  'et-EE': /^(\\+?372)?\\s?(5|8[1-4])\\s?([0-9]\\s?){6,7}$/,\n  'fa-IR': /^(\\+?98[\\-\\s]?|0)9[0-39]\\d[\\-\\s]?\\d{3}[\\-\\s]?\\d{4}$/,\n  'fi-FI': /^(\\+?358|0)\\s?(4(0|1|2|4|5|6)?|50)\\s?(\\d\\s?){4,8}\\d$/,\n  'fo-FO': /^(\\+?298)?\\s?\\d{2}\\s?\\d{2}\\s?\\d{2}$/,\n  'fr-FR': /^(\\+?33|0)[67]\\d{8}$/,\n  'he-IL': /^(\\+972|0)([23489]|5[0248]|77)[1-9]\\d{6}/,\n  'hu-HU': /^(\\+?36)(20|30|70)\\d{7}$/,\n  'id-ID': /^(\\+?62|0[1-9])[\\s|\\d]+$/,\n  'it-IT': /^(\\+?39)?\\s?3\\d{2} ?\\d{6,7}$/,\n  'ja-JP': /^(\\+?81|0)[789]0[ \\-]?[1-9]\\d{2}[ \\-]?\\d{5}$/,\n  'kl-GL': /^(\\+?299)?\\s?\\d{2}\\s?\\d{2}\\s?\\d{2}$/,\n  'ko-KR': /^((\\+?82)[ \\-]?)?0?1([0|1|6|7|8|9]{1})[ \\-]?\\d{3,4}[ \\-]?\\d{4}$/,\n  'lt-LT': /^(\\+370|8)\\d{8}$/,\n  'ms-MY': /^(\\+?6?01){1}(([145]{1}(\\-|\\s)?\\d{7,8})|([236789]{1}(\\s|\\-)?\\d{7}))$/,\n  'nb-NO': /^(\\+?47)?[49]\\d{7}$/,\n  'nl-BE': /^(\\+?32|0)4?\\d{8}$/,\n  'nn-NO': /^(\\+?47)?[49]\\d{7}$/,\n  'pl-PL': /^(\\+?48)? ?[5-8]\\d ?\\d{3} ?\\d{2} ?\\d{2}$/,\n  'pt-BR': /^(\\+?55|0)\\-?[1-9]{2}\\-?[2-9]{1}\\d{3,4}\\-?\\d{4}$/,\n  'pt-PT': /^(\\+?351)?9[1236]\\d{7}$/,\n  'ro-RO': /^(\\+?4?0)\\s?7\\d{2}(\\/|\\s|\\.|\\-)?\\d{3}(\\s|\\.|\\-)?\\d{3}$/,\n  'ru-RU': /^(\\+?7|8)?9\\d{9}$/,\n  'sk-SK': /^(\\+?421)? ?[1-9][0-9]{2} ?[0-9]{3} ?[0-9]{3}$/,\n  'sr-RS': /^(\\+3816|06)[- \\d]{5,9}$/,\n  'tr-TR': /^(\\+?90|0)?5\\d{9}$/,\n  'uk-UA': /^(\\+?38|8)?0\\d{9}$/,\n  'vi-VN': /^(\\+?84|0)?((1(2([0-9])|6([2-9])|88|99))|(9((?!5)[0-9])))([0-9]{7})$/,\n  'zh-CN': /^(\\+?0?86\\-?)?1[345789]\\d{9}$/,\n  'zh-TW': /^(\\+?886\\-?|0)?9\\d{8}$/\n};\n/* eslint-enable max-len */\n\n// aliases\nphones['en-CA'] = phones['en-US'];\nphones['fr-BE'] = phones['nl-BE'];\nphones['zh-HK'] = phones['en-HK'];\n\nfunction isMobilePhone(str, locale) {\n  (0, _assertString2.default)(str);\n  if (locale in phones) {\n    return phones[locale].test(str);\n  } else if (locale === 'any') {\n    for (var key in phones) {\n      if (phones.hasOwnProperty(key)) {\n        var phone = phones[key];\n        if (phone.test(str)) {\n          return true;\n        }\n      }\n    }\n    return false;\n  }\n  throw new Error('Invalid locale \\'' + locale + '\\'');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isMongoId;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _isHexadecimal = require('./isHexadecimal');\n\nvar _isHexadecimal2 = _interopRequireDefault(_isHexadecimal);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isMongoId(str) {\n  (0, _assertString2.default)(str);\n  return (0, _isHexadecimal2.default)(str) && str.length === 24;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isMultibyte;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n/* eslint-disable no-control-regex */\nvar multibyte = /[^\\x00-\\x7F]/;\n/* eslint-enable no-control-regex */\n\nfunction isMultibyte(str) {\n  (0, _assertString2.default)(str);\n  return multibyte.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isNumeric;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar numeric = /^[-+]?[0-9]+$/;\n\nfunction isNumeric(str) {\n  (0, _assertString2.default)(str);\n  return numeric.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isPort;\n\nvar _isInt = require('./isInt');\n\nvar _isInt2 = _interopRequireDefault(_isInt);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isPort(str) {\n  return (0, _isInt2.default)(str, { min: 0, max: 65535 });\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.locales = undefined;\n\nexports.default = function (str, locale) {\n  (0, _assertString2.default)(str);\n  if (locale in patterns) {\n    return patterns[locale].test(str);\n  } else if (locale === 'any') {\n    for (var key in patterns) {\n      if (patterns.hasOwnProperty(key)) {\n        var pattern = patterns[key];\n        if (pattern.test(str)) {\n          return true;\n        }\n      }\n    }\n    return false;\n  }\n  throw new Error('Invalid locale \\'' + locale + '\\'');\n};\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n// common patterns\nvar threeDigit = /^\\d{3}$/;\nvar fourDigit = /^\\d{4}$/;\nvar fiveDigit = /^\\d{5}$/;\nvar sixDigit = /^\\d{6}$/;\n\nvar patterns = {\n  AT: fourDigit,\n  AU: fourDigit,\n  BE: fourDigit,\n  CA: /^[ABCEGHJKLMNPRSTVXY]\\d[ABCEGHJ-NPRSTV-Z][\\s\\-]?\\d[ABCEGHJ-NPRSTV-Z]\\d$/i,\n  CH: fourDigit,\n  CZ: /^\\d{3}\\s?\\d{2}$/,\n  DE: fiveDigit,\n  DK: fourDigit,\n  DZ: fiveDigit,\n  ES: fiveDigit,\n  FI: fiveDigit,\n  FR: /^\\d{2}\\s?\\d{3}$/,\n  GB: /^(gir\\s?0aa|[a-z]{1,2}\\d[\\da-z]?\\s?(\\d[a-z]{2})?)$/i,\n  GR: /^\\d{3}\\s?\\d{2}$/,\n  IL: fiveDigit,\n  IN: sixDigit,\n  IS: threeDigit,\n  IT: fiveDigit,\n  JP: /^\\d{3}\\-\\d{4}$/,\n  KE: fiveDigit,\n  LI: /^(948[5-9]|949[0-7])$/,\n  MX: fiveDigit,\n  NL: /^\\d{4}\\s?[a-z]{2}$/i,\n  NO: fourDigit,\n  PL: /^\\d{2}\\-\\d{3}$/,\n  PT: /^\\d{4}\\-\\d{3}?$/,\n  RO: sixDigit,\n  RU: sixDigit,\n  SA: fiveDigit,\n  SE: /^\\d{3}\\s?\\d{2}$/,\n  TW: /^\\d{3}(\\d{2})?$/,\n  US: /^\\d{5}(-\\d{4})?$/,\n  ZA: fourDigit,\n  ZM: fiveDigit\n};\n\nvar locales = exports.locales = Object.keys(patterns);","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isSurrogatePair;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar surrogatePair = /[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]/;\n\nfunction isSurrogatePair(str) {\n  (0, _assertString2.default)(str);\n  return surrogatePair.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isURL;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _isFQDN = require('./isFQDN');\n\nvar _isFQDN2 = _interopRequireDefault(_isFQDN);\n\nvar _isIP = require('./isIP');\n\nvar _isIP2 = _interopRequireDefault(_isIP);\n\nvar _merge = require('./util/merge');\n\nvar _merge2 = _interopRequireDefault(_merge);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar default_url_options = {\n  protocols: ['http', 'https', 'ftp'],\n  require_tld: true,\n  require_protocol: false,\n  require_host: true,\n  require_valid_protocol: true,\n  allow_underscores: false,\n  allow_trailing_dot: false,\n  allow_protocol_relative_urls: false\n};\n\nvar wrapped_ipv6 = /^\\[([^\\]]+)\\](?::([0-9]+))?$/;\n\nfunction isRegExp(obj) {\n  return Object.prototype.toString.call(obj) === '[object RegExp]';\n}\n\nfunction checkHost(host, matches) {\n  for (var i = 0; i < matches.length; i++) {\n    var match = matches[i];\n    if (host === match || isRegExp(match) && match.test(host)) {\n      return true;\n    }\n  }\n  return false;\n}\n\nfunction isURL(url, options) {\n  (0, _assertString2.default)(url);\n  if (!url || url.length >= 2083 || /[\\s<>]/.test(url)) {\n    return false;\n  }\n  if (url.indexOf('mailto:') === 0) {\n    return false;\n  }\n  options = (0, _merge2.default)(options, default_url_options);\n  var protocol = void 0,\n      auth = void 0,\n      host = void 0,\n      hostname = void 0,\n      port = void 0,\n      port_str = void 0,\n      split = void 0,\n      ipv6 = void 0;\n\n  split = url.split('#');\n  url = split.shift();\n\n  split = url.split('?');\n  url = split.shift();\n\n  split = url.split('://');\n  if (split.length > 1) {\n    protocol = split.shift();\n    if (options.require_valid_protocol && options.protocols.indexOf(protocol) === -1) {\n      return false;\n    }\n  } else if (options.require_protocol) {\n    return false;\n  } else if (options.allow_protocol_relative_urls && url.substr(0, 2) === '//') {\n    split[0] = url.substr(2);\n  }\n  url = split.join('://');\n\n  if (url === '') {\n    return false;\n  }\n\n  split = url.split('/');\n  url = split.shift();\n\n  if (url === '' && !options.require_host) {\n    return true;\n  }\n\n  split = url.split('@');\n  if (split.length > 1) {\n    auth = split.shift();\n    if (auth.indexOf(':') >= 0 && auth.split(':').length > 2) {\n      return false;\n    }\n  }\n  hostname = split.join('@');\n\n  port_str = null;\n  ipv6 = null;\n  var ipv6_match = hostname.match(wrapped_ipv6);\n  if (ipv6_match) {\n    host = '';\n    ipv6 = ipv6_match[1];\n    port_str = ipv6_match[2] || null;\n  } else {\n    split = hostname.split(':');\n    host = split.shift();\n    if (split.length) {\n      port_str = split.join(':');\n    }\n  }\n\n  if (port_str !== null) {\n    port = parseInt(port_str, 10);\n    if (!/^[0-9]+$/.test(port_str) || port <= 0 || port > 65535) {\n      return false;\n    }\n  }\n\n  if (!(0, _isIP2.default)(host) && !(0, _isFQDN2.default)(host, options) && (!ipv6 || !(0, _isIP2.default)(ipv6, 6))) {\n    return false;\n  }\n\n  host = host || ipv6;\n\n  if (options.host_whitelist && !checkHost(host, options.host_whitelist)) {\n    return false;\n  }\n  if (options.host_blacklist && checkHost(host, options.host_blacklist)) {\n    return false;\n  }\n\n  return true;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isUUID;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar uuid = {\n  3: /^[0-9A-F]{8}-[0-9A-F]{4}-3[0-9A-F]{3}-[0-9A-F]{4}-[0-9A-F]{12}$/i,\n  4: /^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i,\n  5: /^[0-9A-F]{8}-[0-9A-F]{4}-5[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i,\n  all: /^[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$/i\n};\n\nfunction isUUID(str) {\n  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'all';\n\n  (0, _assertString2.default)(str);\n  var pattern = uuid[version];\n  return pattern && pattern.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isUppercase;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isUppercase(str) {\n  (0, _assertString2.default)(str);\n  return str === str.toUpperCase();\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isVariableWidth;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _isFullWidth = require('./isFullWidth');\n\nvar _isHalfWidth = require('./isHalfWidth');\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isVariableWidth(str) {\n  (0, _assertString2.default)(str);\n  return _isFullWidth.fullWidth.test(str) && _isHalfWidth.halfWidth.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = isWhitelisted;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction isWhitelisted(str, chars) {\n  (0, _assertString2.default)(str);\n  for (var i = str.length - 1; i >= 0; i--) {\n    if (chars.indexOf(str[i]) === -1) {\n      return false;\n    }\n  }\n  return true;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = ltrim;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction ltrim(str, chars) {\n  (0, _assertString2.default)(str);\n  var pattern = chars ? new RegExp('^[' + chars + ']+', 'g') : /^\\s+/g;\n  return str.replace(pattern, '');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = matches;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction matches(str, pattern, modifiers) {\n  (0, _assertString2.default)(str);\n  if (Object.prototype.toString.call(pattern) !== '[object RegExp]') {\n    pattern = new RegExp(pattern, modifiers);\n  }\n  return pattern.test(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = normalizeEmail;\n\nvar _merge = require('./util/merge');\n\nvar _merge2 = _interopRequireDefault(_merge);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar default_normalize_email_options = {\n  // The following options apply to all email addresses\n  // Lowercases the local part of the email address.\n  // Please note this may violate RFC 5321 as per http://stackoverflow.com/a/9808332/192024).\n  // The domain is always lowercased, as per RFC 1035\n  all_lowercase: true,\n\n  // The following conversions are specific to GMail\n  // Lowercases the local part of the GMail address (known to be case-insensitive)\n  gmail_lowercase: true,\n  // Removes dots from the local part of the email address, as that's ignored by GMail\n  gmail_remove_dots: true,\n  // Removes the subaddress (e.g. \"+foo\") from the email address\n  gmail_remove_subaddress: true,\n  // Conversts the googlemail.com domain to gmail.com\n  gmail_convert_googlemaildotcom: true,\n\n  // The following conversions are specific to Outlook.com / Windows Live / Hotmail\n  // Lowercases the local part of the Outlook.com address (known to be case-insensitive)\n  outlookdotcom_lowercase: true,\n  // Removes the subaddress (e.g. \"+foo\") from the email address\n  outlookdotcom_remove_subaddress: true,\n\n  // The following conversions are specific to Yahoo\n  // Lowercases the local part of the Yahoo address (known to be case-insensitive)\n  yahoo_lowercase: true,\n  // Removes the subaddress (e.g. \"-foo\") from the email address\n  yahoo_remove_subaddress: true,\n\n  // The following conversions are specific to iCloud\n  // Lowercases the local part of the iCloud address (known to be case-insensitive)\n  icloud_lowercase: true,\n  // Removes the subaddress (e.g. \"+foo\") from the email address\n  icloud_remove_subaddress: true\n};\n\n// List of domains used by iCloud\nvar icloud_domains = ['icloud.com', 'me.com'];\n\n// List of domains used by Outlook.com and its predecessors\n// This list is likely incomplete.\n// Partial reference:\n// https://blogs.office.com/2013/04/17/outlook-com-gets-two-step-verification-sign-in-by-alias-and-new-international-domains/\nvar outlookdotcom_domains = ['hotmail.at', 'hotmail.be', 'hotmail.ca', 'hotmail.cl', 'hotmail.co.il', 'hotmail.co.nz', 'hotmail.co.th', 'hotmail.co.uk', 'hotmail.com', 'hotmail.com.ar', 'hotmail.com.au', 'hotmail.com.br', 'hotmail.com.gr', 'hotmail.com.mx', 'hotmail.com.pe', 'hotmail.com.tr', 'hotmail.com.vn', 'hotmail.cz', 'hotmail.de', 'hotmail.dk', 'hotmail.es', 'hotmail.fr', 'hotmail.hu', 'hotmail.id', 'hotmail.ie', 'hotmail.in', 'hotmail.it', 'hotmail.jp', 'hotmail.kr', 'hotmail.lv', 'hotmail.my', 'hotmail.ph', 'hotmail.pt', 'hotmail.sa', 'hotmail.sg', 'hotmail.sk', 'live.be', 'live.co.uk', 'live.com', 'live.com.ar', 'live.com.mx', 'live.de', 'live.es', 'live.eu', 'live.fr', 'live.it', 'live.nl', 'msn.com', 'outlook.at', 'outlook.be', 'outlook.cl', 'outlook.co.il', 'outlook.co.nz', 'outlook.co.th', 'outlook.com', 'outlook.com.ar', 'outlook.com.au', 'outlook.com.br', 'outlook.com.gr', 'outlook.com.pe', 'outlook.com.tr', 'outlook.com.vn', 'outlook.cz', 'outlook.de', 'outlook.dk', 'outlook.es', 'outlook.fr', 'outlook.hu', 'outlook.id', 'outlook.ie', 'outlook.in', 'outlook.it', 'outlook.jp', 'outlook.kr', 'outlook.lv', 'outlook.my', 'outlook.ph', 'outlook.pt', 'outlook.sa', 'outlook.sg', 'outlook.sk', 'passport.com'];\n\n// List of domains used by Yahoo Mail\n// This list is likely incomplete\nvar yahoo_domains = ['rocketmail.com', 'yahoo.ca', 'yahoo.co.uk', 'yahoo.com', 'yahoo.de', 'yahoo.fr', 'yahoo.in', 'yahoo.it', 'ymail.com'];\n\nfunction normalizeEmail(email, options) {\n  options = (0, _merge2.default)(options, default_normalize_email_options);\n\n  var raw_parts = email.split('@');\n  var domain = raw_parts.pop();\n  var user = raw_parts.join('@');\n  var parts = [user, domain];\n\n  // The domain is always lowercased, as it's case-insensitive per RFC 1035\n  parts[1] = parts[1].toLowerCase();\n\n  if (parts[1] === 'gmail.com' || parts[1] === 'googlemail.com') {\n    // Address is GMail\n    if (options.gmail_remove_subaddress) {\n      parts[0] = parts[0].split('+')[0];\n    }\n    if (options.gmail_remove_dots) {\n      parts[0] = parts[0].replace(/\\./g, '');\n    }\n    if (!parts[0].length) {\n      return false;\n    }\n    if (options.all_lowercase || options.gmail_lowercase) {\n      parts[0] = parts[0].toLowerCase();\n    }\n    parts[1] = options.gmail_convert_googlemaildotcom ? 'gmail.com' : parts[1];\n  } else if (~icloud_domains.indexOf(parts[1])) {\n    // Address is iCloud\n    if (options.icloud_remove_subaddress) {\n      parts[0] = parts[0].split('+')[0];\n    }\n    if (!parts[0].length) {\n      return false;\n    }\n    if (options.all_lowercase || options.icloud_lowercase) {\n      parts[0] = parts[0].toLowerCase();\n    }\n  } else if (~outlookdotcom_domains.indexOf(parts[1])) {\n    // Address is Outlook.com\n    if (options.outlookdotcom_remove_subaddress) {\n      parts[0] = parts[0].split('+')[0];\n    }\n    if (!parts[0].length) {\n      return false;\n    }\n    if (options.all_lowercase || options.outlookdotcom_lowercase) {\n      parts[0] = parts[0].toLowerCase();\n    }\n  } else if (~yahoo_domains.indexOf(parts[1])) {\n    // Address is Yahoo\n    if (options.yahoo_remove_subaddress) {\n      var components = parts[0].split('-');\n      parts[0] = components.length > 1 ? components.slice(0, -1).join('-') : components[0];\n    }\n    if (!parts[0].length) {\n      return false;\n    }\n    if (options.all_lowercase || options.yahoo_lowercase) {\n      parts[0] = parts[0].toLowerCase();\n    }\n  } else if (options.all_lowercase) {\n    // Any other address\n    parts[0] = parts[0].toLowerCase();\n  }\n  return parts.join('@');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = rtrim;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction rtrim(str, chars) {\n  (0, _assertString2.default)(str);\n  var pattern = chars ? new RegExp('[' + chars + ']') : /\\s/;\n\n  var idx = str.length - 1;\n  while (idx >= 0 && pattern.test(str[idx])) {\n    idx--;\n  }\n\n  return idx < str.length ? str.substr(0, idx + 1) : str;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = stripLow;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nvar _blacklist = require('./blacklist');\n\nvar _blacklist2 = _interopRequireDefault(_blacklist);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction stripLow(str, keep_new_lines) {\n  (0, _assertString2.default)(str);\n  var chars = keep_new_lines ? '\\\\x00-\\\\x09\\\\x0B\\\\x0C\\\\x0E-\\\\x1F\\\\x7F' : '\\\\x00-\\\\x1F\\\\x7F';\n  return (0, _blacklist2.default)(str, chars);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = toBoolean;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction toBoolean(str, strict) {\n  (0, _assertString2.default)(str);\n  if (strict) {\n    return str === '1' || str === 'true';\n  }\n  return str !== '0' && str !== 'false' && str !== '';\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = toDate;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction toDate(date) {\n  (0, _assertString2.default)(date);\n  date = Date.parse(date);\n  return !isNaN(date) ? new Date(date) : null;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = toFloat;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction toFloat(str) {\n  (0, _assertString2.default)(str);\n  return parseFloat(str);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = toInt;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction toInt(str, radix) {\n  (0, _assertString2.default)(str);\n  return parseInt(str, radix || 10);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = trim;\n\nvar _rtrim = require('./rtrim');\n\nvar _rtrim2 = _interopRequireDefault(_rtrim);\n\nvar _ltrim = require('./ltrim');\n\nvar _ltrim2 = _interopRequireDefault(_ltrim);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction trim(str, chars) {\n  return (0, _rtrim2.default)((0, _ltrim2.default)(str, chars), chars);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = unescape;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction unescape(str) {\n  (0, _assertString2.default)(str);\n  return str.replace(/&amp;/g, '&').replace(/&quot;/g, '\"').replace(/&#x27;/g, \"'\").replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&#x2F;/g, '/').replace(/&#x5C;/g, '\\\\').replace(/&#96;/g, '`');\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = assertString;\nfunction assertString(input) {\n  var isString = typeof input === 'string' || input instanceof String;\n\n  if (!isString) {\n    throw new TypeError('This library (validator.js) validates strings only');\n  }\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = merge;\nfunction merge() {\n  var obj = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n  var defaults = arguments[1];\n\n  for (var key in defaults) {\n    if (typeof obj[key] === 'undefined') {\n      obj[key] = defaults[key];\n    }\n  }\n  return obj;\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nexports.default = toString;\nfunction toString(input) {\n  if ((typeof input === 'undefined' ? 'undefined' : _typeof(input)) === 'object' && input !== null) {\n    if (typeof input.toString === 'function') {\n      input = input.toString();\n    } else {\n      input = '[object Object]';\n    }\n  } else if (input === null || typeof input === 'undefined' || isNaN(input) && !input.length) {\n    input = '';\n  }\n  return String(input);\n}\nmodule.exports = exports['default'];","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = whitelist;\n\nvar _assertString = require('./util/assertString');\n\nvar _assertString2 = _interopRequireDefault(_assertString);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction whitelist(str, chars) {\n  (0, _assertString2.default)(str);\n  return str.replace(new RegExp('[^' + chars + ']+', 'g'), '');\n}\nmodule.exports = exports['default'];","\"use strict\";\n\nmodule.exports = {\n\n    INVALID_TYPE:                           \"Expected type {0} but found type {1}\",\n    INVALID_FORMAT:                         \"Object didn't pass validation for format {0}: {1}\",\n    ENUM_MISMATCH:                          \"No enum match for: {0}\",\n    ANY_OF_MISSING:                         \"Data does not match any schemas from 'anyOf'\",\n    ONE_OF_MISSING:                         \"Data does not match any schemas from 'oneOf'\",\n    ONE_OF_MULTIPLE:                        \"Data is valid against more than one schema from 'oneOf'\",\n    NOT_PASSED:                             \"Data matches schema from 'not'\",\n\n    // Array errors\n    ARRAY_LENGTH_SHORT:                     \"Array is too short ({0}), minimum {1}\",\n    ARRAY_LENGTH_LONG:                      \"Array is too long ({0}), maximum {1}\",\n    ARRAY_UNIQUE:                           \"Array items are not unique (indexes {0} and {1})\",\n    ARRAY_ADDITIONAL_ITEMS:                 \"Additional items not allowed\",\n\n    // Numeric errors\n    MULTIPLE_OF:                            \"Value {0} is not a multiple of {1}\",\n    MINIMUM:                                \"Value {0} is less than minimum {1}\",\n    MINIMUM_EXCLUSIVE:                      \"Value {0} is equal or less than exclusive minimum {1}\",\n    MAXIMUM:                                \"Value {0} is greater than maximum {1}\",\n    MAXIMUM_EXCLUSIVE:                      \"Value {0} is equal or greater than exclusive maximum {1}\",\n\n    // Object errors\n    OBJECT_PROPERTIES_MINIMUM:              \"Too few properties defined ({0}), minimum {1}\",\n    OBJECT_PROPERTIES_MAXIMUM:              \"Too many properties defined ({0}), maximum {1}\",\n    OBJECT_MISSING_REQUIRED_PROPERTY:       \"Missing required property: {0}\",\n    OBJECT_ADDITIONAL_PROPERTIES:           \"Additional properties not allowed: {0}\",\n    OBJECT_DEPENDENCY_KEY:                  \"Dependency failed - key must exist: {0} (due to key: {1})\",\n\n    // String errors\n    MIN_LENGTH:                             \"String is too short ({0} chars), minimum {1}\",\n    MAX_LENGTH:                             \"String is too long ({0} chars), maximum {1}\",\n    PATTERN:                                \"String does not match pattern {0}: {1}\",\n\n    // Schema validation errors\n    KEYWORD_TYPE_EXPECTED:                  \"Keyword '{0}' is expected to be of type '{1}'\",\n    KEYWORD_UNDEFINED_STRICT:               \"Keyword '{0}' must be defined in strict mode\",\n    KEYWORD_UNEXPECTED:                     \"Keyword '{0}' is not expected to appear in the schema\",\n    KEYWORD_MUST_BE:                        \"Keyword '{0}' must be {1}\",\n    KEYWORD_DEPENDENCY:                     \"Keyword '{0}' requires keyword '{1}'\",\n    KEYWORD_PATTERN:                        \"Keyword '{0}' is not a valid RegExp pattern: {1}\",\n    KEYWORD_VALUE_TYPE:                     \"Each element of keyword '{0}' array must be a '{1}'\",\n    UNKNOWN_FORMAT:                         \"There is no validation function for format '{0}'\",\n    CUSTOM_MODE_FORCE_PROPERTIES:           \"{0} must define at least one property if present\",\n\n    // Remote errors\n    REF_UNRESOLVED:                         \"Reference has not been resolved during compilation: {0}\",\n    UNRESOLVABLE_REFERENCE:                 \"Reference could not be resolved: {0}\",\n    SCHEMA_NOT_REACHABLE:                   \"Validator was not able to read schema with uri: {0}\",\n    SCHEMA_TYPE_EXPECTED:                   \"Schema is expected to be of type 'object'\",\n    SCHEMA_NOT_AN_OBJECT:                   \"Schema is not an object: {0}\",\n    ASYNC_TIMEOUT:                          \"{0} asynchronous task(s) have timed out after {1} ms\",\n    PARENT_SCHEMA_VALIDATION_FAILED:        \"Schema failed to validate against its parent schema, see inner errors for details.\",\n    REMOTE_NOT_VALID:                       \"Remote reference didn't compile successfully: {0}\"\n\n};\n","/*jshint maxlen: false*/\n\nvar validator = require(\"validator\");\n\nvar FormatValidators = {\n    \"date\": function (date) {\n        if (typeof date !== \"string\") {\n            return true;\n        }\n        // full-date from http://tools.ietf.org/html/rfc3339#section-5.6\n        var matches = /^([0-9]{4})-([0-9]{2})-([0-9]{2})$/.exec(date);\n        if (matches === null) {\n            return false;\n        }\n        // var year = matches[1];\n        // var month = matches[2];\n        // var day = matches[3];\n        if (matches[2] < \"01\" || matches[2] > \"12\" || matches[3] < \"01\" || matches[3] > \"31\") {\n            return false;\n        }\n        return true;\n    },\n    \"date-time\": function (dateTime) {\n        if (typeof dateTime !== \"string\") {\n            return true;\n        }\n        // date-time from http://tools.ietf.org/html/rfc3339#section-5.6\n        var s = dateTime.toLowerCase().split(\"t\");\n        if (!FormatValidators.date(s[0])) {\n            return false;\n        }\n        var matches = /^([0-9]{2}):([0-9]{2}):([0-9]{2})(.[0-9]+)?(z|([+-][0-9]{2}:[0-9]{2}))$/.exec(s[1]);\n        if (matches === null) {\n            return false;\n        }\n        // var hour = matches[1];\n        // var minute = matches[2];\n        // var second = matches[3];\n        // var fraction = matches[4];\n        // var timezone = matches[5];\n        if (matches[1] > \"23\" || matches[2] > \"59\" || matches[3] > \"59\") {\n            return false;\n        }\n        return true;\n    },\n    \"email\": function (email) {\n        if (typeof email !== \"string\") {\n            return true;\n        }\n        return validator.isEmail(email, { \"require_tld\": true });\n    },\n    \"hostname\": function (hostname) {\n        if (typeof hostname !== \"string\") {\n            return true;\n        }\n        /*\n            http://json-schema.org/latest/json-schema-validation.html#anchor114\n            A string instance is valid against this attribute if it is a valid\n            representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034].\n\n            http://tools.ietf.org/html/rfc1034#section-3.5\n\n            <digit> ::= any one of the ten digits 0 through 9\n            var digit = /[0-9]/;\n\n            <letter> ::= any one of the 52 alphabetic characters A through Z in upper case and a through z in lower case\n            var letter = /[a-zA-Z]/;\n\n            <let-dig> ::= <letter> | <digit>\n            var letDig = /[0-9a-zA-Z]/;\n\n            <let-dig-hyp> ::= <let-dig> | \"-\"\n            var letDigHyp = /[-0-9a-zA-Z]/;\n\n            <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>\n            var ldhStr = /[-0-9a-zA-Z]+/;\n\n            <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]\n            var label = /[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?/;\n\n            <subdomain> ::= <label> | <subdomain> \".\" <label>\n            var subdomain = /^[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?(\\.[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?)*$/;\n\n            <domain> ::= <subdomain> | \" \"\n            var domain = null;\n        */\n        var valid = /^[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?(\\.[a-zA-Z](([-0-9a-zA-Z]+)?[0-9a-zA-Z])?)*$/.test(hostname);\n        if (valid) {\n            // the sum of all label octets and label lengths is limited to 255.\n            if (hostname.length > 255) { return false; }\n            // Each node has a label, which is zero to 63 octets in length\n            var labels = hostname.split(\".\");\n            for (var i = 0; i < labels.length; i++) { if (labels[i].length > 63) { return false; } }\n        }\n        return valid;\n    },\n    \"host-name\": function (hostname) {\n        return FormatValidators.hostname.call(this, hostname);\n    },\n    \"ipv4\": function (ipv4) {\n        if (typeof ipv4 !== \"string\") { return true; }\n        return validator.isIP(ipv4, 4);\n    },\n    \"ipv6\": function (ipv6) {\n        if (typeof ipv6 !== \"string\") { return true; }\n        return validator.isIP(ipv6, 6);\n    },\n    \"regex\": function (str) {\n        try {\n            RegExp(str);\n            return true;\n        } catch (e) {\n            return false;\n        }\n    },\n    \"uri\": function (uri) {\n        if (this.options.strictUris) {\n            return FormatValidators[\"strict-uri\"].apply(this, arguments);\n        }\n        // https://github.com/zaggino/z-schema/issues/18\n        // RegExp from http://tools.ietf.org/html/rfc3986#appendix-B\n        return typeof uri !== \"string\" || RegExp(\"^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\\\?([^#]*))?(#(.*))?\").test(uri);\n    },\n    \"strict-uri\": function (uri) {\n        return typeof uri !== \"string\" || validator.isURL(uri);\n    }\n};\n\nmodule.exports = FormatValidators;\n","\"use strict\";\n\nvar FormatValidators  = require(\"./FormatValidators\"),\n    Report            = require(\"./Report\"),\n    Utils             = require(\"./Utils\");\n\nvar JsonValidators = {\n    multipleOf: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.1.2\n        if (typeof json !== \"number\") {\n            return;\n        }\n        if (Utils.whatIs(json / schema.multipleOf) !== \"integer\") {\n            report.addError(\"MULTIPLE_OF\", [json, schema.multipleOf], null, schema.description);\n        }\n    },\n    maximum: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.2.2\n        if (typeof json !== \"number\") {\n            return;\n        }\n        if (schema.exclusiveMaximum !== true) {\n            if (json > schema.maximum) {\n                report.addError(\"MAXIMUM\", [json, schema.maximum], null, schema.description);\n            }\n        } else {\n            if (json >= schema.maximum) {\n                report.addError(\"MAXIMUM_EXCLUSIVE\", [json, schema.maximum], null, schema.description);\n            }\n        }\n    },\n    exclusiveMaximum: function () {\n        // covered in maximum\n    },\n    minimum: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.3.2\n        if (typeof json !== \"number\") {\n            return;\n        }\n        if (schema.exclusiveMinimum !== true) {\n            if (json < schema.minimum) {\n                report.addError(\"MINIMUM\", [json, schema.minimum], null, schema.description);\n            }\n        } else {\n            if (json <= schema.minimum) {\n                report.addError(\"MINIMUM_EXCLUSIVE\", [json, schema.minimum], null, schema.description);\n            }\n        }\n    },\n    exclusiveMinimum: function () {\n        // covered in minimum\n    },\n    maxLength: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.1.2\n        if (typeof json !== \"string\") {\n            return;\n        }\n        if (Utils.ucs2decode(json).length > schema.maxLength) {\n            report.addError(\"MAX_LENGTH\", [json.length, schema.maxLength], null, schema.description);\n        }\n    },\n    minLength: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.2.2\n        if (typeof json !== \"string\") {\n            return;\n        }\n        if (Utils.ucs2decode(json).length < schema.minLength) {\n            report.addError(\"MIN_LENGTH\", [json.length, schema.minLength], null, schema.description);\n        }\n    },\n    pattern: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.3.2\n        if (typeof json !== \"string\") {\n            return;\n        }\n        if (RegExp(schema.pattern).test(json) === false) {\n            report.addError(\"PATTERN\", [schema.pattern, json], null, schema.description);\n        }\n    },\n    additionalItems: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.1.2\n        if (!Array.isArray(json)) {\n            return;\n        }\n        // if the value of \"additionalItems\" is boolean value false and the value of \"items\" is an array,\n        // the json is valid if its size is less than, or equal to, the size of \"items\".\n        if (schema.additionalItems === false && Array.isArray(schema.items)) {\n            if (json.length > schema.items.length) {\n                report.addError(\"ARRAY_ADDITIONAL_ITEMS\", null, null, schema.description);\n            }\n        }\n    },\n    items: function () { /*report, schema, json*/\n        // covered in additionalItems\n    },\n    maxItems: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.2.2\n        if (!Array.isArray(json)) {\n            return;\n        }\n        if (json.length > schema.maxItems) {\n            report.addError(\"ARRAY_LENGTH_LONG\", [json.length, schema.maxItems], null, schema.description);\n        }\n    },\n    minItems: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.3.2\n        if (!Array.isArray(json)) {\n            return;\n        }\n        if (json.length < schema.minItems) {\n            report.addError(\"ARRAY_LENGTH_SHORT\", [json.length, schema.minItems], null, schema.description);\n        }\n    },\n    uniqueItems: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.4.2\n        if (!Array.isArray(json)) {\n            return;\n        }\n        if (schema.uniqueItems === true) {\n            var matches = [];\n            if (Utils.isUniqueArray(json, matches) === false) {\n                report.addError(\"ARRAY_UNIQUE\", matches, null, schema.description);\n            }\n        }\n    },\n    maxProperties: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.1.2\n        if (Utils.whatIs(json) !== \"object\") {\n            return;\n        }\n        var keysCount = Object.keys(json).length;\n        if (keysCount > schema.maxProperties) {\n            report.addError(\"OBJECT_PROPERTIES_MAXIMUM\", [keysCount, schema.maxProperties], null, schema.description);\n        }\n    },\n    minProperties: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.2.2\n        if (Utils.whatIs(json) !== \"object\") {\n            return;\n        }\n        var keysCount = Object.keys(json).length;\n        if (keysCount < schema.minProperties) {\n            report.addError(\"OBJECT_PROPERTIES_MINIMUM\", [keysCount, schema.minProperties], null, schema.description);\n        }\n    },\n    required: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.3.2\n        if (Utils.whatIs(json) !== \"object\") {\n            return;\n        }\n        var idx = schema.required.length;\n        while (idx--) {\n            var requiredPropertyName = schema.required[idx];\n            if (json[requiredPropertyName] === undefined) {\n                report.addError(\"OBJECT_MISSING_REQUIRED_PROPERTY\", [requiredPropertyName], null, schema.description);\n            }\n        }\n    },\n    additionalProperties: function (report, schema, json) {\n        // covered in properties and patternProperties\n        if (schema.properties === undefined && schema.patternProperties === undefined) {\n            return JsonValidators.properties.call(this, report, schema, json);\n        }\n    },\n    patternProperties: function (report, schema, json) {\n        // covered in properties\n        if (schema.properties === undefined) {\n            return JsonValidators.properties.call(this, report, schema, json);\n        }\n    },\n    properties: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.2\n        if (Utils.whatIs(json) !== \"object\") {\n            return;\n        }\n        var properties = schema.properties !== undefined ? schema.properties : {};\n        var patternProperties = schema.patternProperties !== undefined ? schema.patternProperties : {};\n        if (schema.additionalProperties === false) {\n            // The property set of the json to validate.\n            var s = Object.keys(json);\n            // The property set from \"properties\".\n            var p = Object.keys(properties);\n            // The property set from \"patternProperties\".\n            var pp = Object.keys(patternProperties);\n            // remove from \"s\" all elements of \"p\", if any;\n            s = Utils.difference(s, p);\n            // for each regex in \"pp\", remove all elements of \"s\" which this regex matches.\n            var idx = pp.length;\n            while (idx--) {\n                var regExp = RegExp(pp[idx]),\n                    idx2 = s.length;\n                while (idx2--) {\n                    if (regExp.test(s[idx2]) === true) {\n                        s.splice(idx2, 1);\n                    }\n                }\n            }\n            // Validation of the json succeeds if, after these two steps, set \"s\" is empty.\n            if (s.length > 0) {\n                // assumeAdditional can be an array of allowed properties\n                var idx3 = this.options.assumeAdditional.length;\n                if (idx3) {\n                    while (idx3--) {\n                        var io = s.indexOf(this.options.assumeAdditional[idx3]);\n                        if (io !== -1) {\n                            s.splice(io, 1);\n                        }\n                    }\n                }\n                if (s.length > 0) {\n                    report.addError(\"OBJECT_ADDITIONAL_PROPERTIES\", [s], null, schema.description);\n                }\n            }\n        }\n    },\n    dependencies: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.5.2\n        if (Utils.whatIs(json) !== \"object\") {\n            return;\n        }\n\n        var keys = Object.keys(schema.dependencies),\n            idx = keys.length;\n\n        while (idx--) {\n            // iterate all dependencies\n            var dependencyName = keys[idx];\n            if (json[dependencyName]) {\n                var dependencyDefinition = schema.dependencies[dependencyName];\n                if (Utils.whatIs(dependencyDefinition) === \"object\") {\n                    // if dependency is a schema, validate against this schema\n                    exports.validate.call(this, report, dependencyDefinition, json);\n                } else { // Array\n                    // if dependency is an array, object needs to have all properties in this array\n                    var idx2 = dependencyDefinition.length;\n                    while (idx2--) {\n                        var requiredPropertyName = dependencyDefinition[idx2];\n                        if (json[requiredPropertyName] === undefined) {\n                            report.addError(\"OBJECT_DEPENDENCY_KEY\", [requiredPropertyName, dependencyName], null, schema.description);\n                        }\n                    }\n                }\n            }\n        }\n    },\n    enum: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.1.2\n        var match = false,\n            idx = schema.enum.length;\n        while (idx--) {\n            if (Utils.areEqual(json, schema.enum[idx])) {\n                match = true;\n                break;\n            }\n        }\n        if (match === false) {\n            report.addError(\"ENUM_MISMATCH\", [json], null, schema.description);\n        }\n    },\n    /*\n    type: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.2.2\n        // type is handled before this is called so ignore\n    },\n    */\n    allOf: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.3.2\n        var idx = schema.allOf.length;\n        while (idx--) {\n            var validateResult = exports.validate.call(this, report, schema.allOf[idx], json);\n            if (this.options.breakOnFirstError && validateResult === false) {\n                break;\n            }\n        }\n    },\n    anyOf: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.4.2\n        var subReports = [],\n            passed = false,\n            idx = schema.anyOf.length;\n\n        while (idx-- && passed === false) {\n            var subReport = new Report(report);\n            subReports.push(subReport);\n            passed = exports.validate.call(this, subReport, schema.anyOf[idx], json);\n        }\n\n        if (passed === false) {\n            report.addError(\"ANY_OF_MISSING\", undefined, subReports, schema.description);\n        }\n    },\n    oneOf: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.5.2\n        var passes = 0,\n            subReports = [],\n            idx = schema.oneOf.length;\n\n        while (idx--) {\n            var subReport = new Report(report, { maxErrors: 1 });\n            subReports.push(subReport);\n            if (exports.validate.call(this, subReport, schema.oneOf[idx], json) === true) {\n                passes++;\n            }\n        }\n\n        if (passes === 0) {\n            report.addError(\"ONE_OF_MISSING\", undefined, subReports, schema.description);\n        } else if (passes > 1) {\n            report.addError(\"ONE_OF_MULTIPLE\", null, null, schema.description);\n        }\n    },\n    not: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.6.2\n        var subReport = new Report(report);\n        if (exports.validate.call(this, subReport, schema.not, json) === true) {\n            report.addError(\"NOT_PASSED\", null, null, schema.description);\n        }\n    },\n    definitions: function () { /*report, schema, json*/\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.7.2\n        // nothing to do here\n    },\n    format: function (report, schema, json) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.7.2\n        var formatValidatorFn = FormatValidators[schema.format];\n        if (typeof formatValidatorFn === \"function\") {\n            if (formatValidatorFn.length === 2) {\n                // async\n                report.addAsyncTask(formatValidatorFn, [json], function (result) {\n                    if (result !== true) {\n                        report.addError(\"INVALID_FORMAT\", [schema.format, json], null, schema.description);\n                    }\n                });\n            } else {\n                // sync\n                if (formatValidatorFn.call(this, json) !== true) {\n                    report.addError(\"INVALID_FORMAT\", [schema.format, json], null, schema.description);\n                }\n            }\n        } else if (this.options.ignoreUnknownFormats !== true) {\n            report.addError(\"UNKNOWN_FORMAT\", [schema.format], null, schema.description);\n        }\n    }\n};\n\nvar recurseArray = function (report, schema, json) {\n    // http://json-schema.org/latest/json-schema-validation.html#rfc.section.8.2\n\n    var idx = json.length;\n\n    // If \"items\" is an array, this situation, the schema depends on the index:\n    // if the index is less than, or equal to, the size of \"items\",\n    // the child instance must be valid against the corresponding schema in the \"items\" array;\n    // otherwise, it must be valid against the schema defined by \"additionalItems\".\n    if (Array.isArray(schema.items)) {\n\n        while (idx--) {\n            // equal to doesnt make sense here\n            if (idx < schema.items.length) {\n                report.path.push(idx.toString());\n                exports.validate.call(this, report, schema.items[idx], json[idx]);\n                report.path.pop();\n            } else {\n                // might be boolean, so check that it's an object\n                if (typeof schema.additionalItems === \"object\") {\n                    report.path.push(idx.toString());\n                    exports.validate.call(this, report, schema.additionalItems, json[idx]);\n                    report.path.pop();\n                }\n            }\n        }\n\n    } else if (typeof schema.items === \"object\") {\n\n        // If items is a schema, then the child instance must be valid against this schema,\n        // regardless of its index, and regardless of the value of \"additionalItems\".\n        while (idx--) {\n            report.path.push(idx.toString());\n            exports.validate.call(this, report, schema.items, json[idx]);\n            report.path.pop();\n        }\n\n    }\n};\n\nvar recurseObject = function (report, schema, json) {\n    // http://json-schema.org/latest/json-schema-validation.html#rfc.section.8.3\n\n    // If \"additionalProperties\" is absent, it is considered present with an empty schema as a value.\n    // In addition, boolean value true is considered equivalent to an empty schema.\n    var additionalProperties = schema.additionalProperties;\n    if (additionalProperties === true || additionalProperties === undefined) {\n        additionalProperties = {};\n    }\n\n    // p - The property set from \"properties\".\n    var p = schema.properties ? Object.keys(schema.properties) : [];\n\n    // pp - The property set from \"patternProperties\". Elements of this set will be called regexes for convenience.\n    var pp = schema.patternProperties ? Object.keys(schema.patternProperties) : [];\n\n    // m - The property name of the child.\n    var keys = Object.keys(json),\n        idx = keys.length;\n\n    while (idx--) {\n        var m = keys[idx],\n            propertyValue = json[m];\n\n        // s - The set of schemas for the child instance.\n        var s = [];\n\n        // 1. If set \"p\" contains value \"m\", then the corresponding schema in \"properties\" is added to \"s\".\n        if (p.indexOf(m) !== -1) {\n            s.push(schema.properties[m]);\n        }\n\n        // 2. For each regex in \"pp\", if it matches \"m\" successfully, the corresponding schema in \"patternProperties\" is added to \"s\".\n        var idx2 = pp.length;\n        while (idx2--) {\n            var regexString = pp[idx2];\n            if (RegExp(regexString).test(m) === true) {\n                s.push(schema.patternProperties[regexString]);\n            }\n        }\n\n        // 3. The schema defined by \"additionalProperties\" is added to \"s\" if and only if, at this stage, \"s\" is empty.\n        if (s.length === 0 && additionalProperties !== false) {\n            s.push(additionalProperties);\n        }\n\n        // we are passing tests even without this assert because this is covered by properties check\n        // if s is empty in this stage, no additionalProperties are allowed\n        // report.expect(s.length !== 0, 'E001', m);\n\n        // Instance property value must pass all schemas from s\n        idx2 = s.length;\n        while (idx2--) {\n            report.path.push(m);\n            exports.validate.call(this, report, s[idx2], propertyValue);\n            report.path.pop();\n        }\n    }\n};\n\nexports.validate = function (report, schema, json) {\n\n    report.commonErrorMessage = \"JSON_OBJECT_VALIDATION_FAILED\";\n\n    // check if schema is an object\n    var to = Utils.whatIs(schema);\n    if (to !== \"object\") {\n        report.addError(\"SCHEMA_NOT_AN_OBJECT\", [to], null, schema.description);\n        return false;\n    }\n\n    // check if schema is empty, everything is valid against empty schema\n    var keys = Object.keys(schema);\n    if (keys.length === 0) {\n        return true;\n    }\n\n    // this method can be called recursively, so we need to remember our root\n    var isRoot = false;\n    if (!report.rootSchema) {\n        report.rootSchema = schema;\n        isRoot = true;\n    }\n\n    // follow schema.$ref keys\n    if (schema.$ref !== undefined) {\n        // avoid infinite loop with maxRefs\n        var maxRefs = 99;\n        while (schema.$ref && maxRefs > 0) {\n            if (!schema.__$refResolved) {\n                report.addError(\"REF_UNRESOLVED\", [schema.$ref], null, schema.description);\n                break;\n            } else if (schema.__$refResolved === schema) {\n                break;\n            } else {\n                schema = schema.__$refResolved;\n                keys = Object.keys(schema);\n            }\n            maxRefs--;\n        }\n        if (maxRefs === 0) {\n            throw new Error(\"Circular dependency by $ref references!\");\n        }\n    }\n\n    // type checking first\n    // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.2.2\n    var jsonType = Utils.whatIs(json);\n    if (schema.type) {\n        if (typeof schema.type === \"string\") {\n            if (jsonType !== schema.type && (jsonType !== \"integer\" || schema.type !== \"number\")) {\n                report.addError(\"INVALID_TYPE\", [schema.type, jsonType], null, schema.description);\n                if (this.options.breakOnFirstError) {\n                    return false;\n                }\n            }\n        } else {\n            if (schema.type.indexOf(jsonType) === -1 && (jsonType !== \"integer\" || schema.type.indexOf(\"number\") === -1)) {\n                report.addError(\"INVALID_TYPE\", [schema.type, jsonType], null, schema.description);\n                if (this.options.breakOnFirstError) {\n                    return false;\n                }\n            }\n        }\n    }\n\n    // now iterate all the keys in schema and execute validation methods\n    var idx = keys.length;\n    while (idx--) {\n        if (JsonValidators[keys[idx]]) {\n            JsonValidators[keys[idx]].call(this, report, schema, json);\n            if (report.errors.length && this.options.breakOnFirstError) { break; }\n        }\n    }\n\n    if (report.errors.length === 0 || this.options.breakOnFirstError === false) {\n        if (jsonType === \"array\") {\n            recurseArray.call(this, report, schema, json);\n        } else if (jsonType === \"object\") {\n            recurseObject.call(this, report, schema, json);\n        }\n    }\n\n    if (typeof this.options.customValidator === \"function\") {\n        this.options.customValidator(report, schema, json);\n    }\n\n    // we don't need the root pointer anymore\n    if (isRoot) {\n        report.rootSchema = undefined;\n    }\n\n    // return valid just to be able to break at some code points\n    return report.errors.length === 0;\n\n};\n","// Number.isFinite polyfill\n// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite\nif (typeof Number.isFinite !== \"function\") {\n    Number.isFinite = function isFinite(value) {\n        // 1. If Type(number) is not Number, return false.\n        if (typeof value !== \"number\") {\n            return false;\n        }\n        // 2. If number is NaN, +∞, or −∞, return false.\n        if (value !== value || value === Infinity || value === -Infinity) {\n            return false;\n        }\n        // 3. Otherwise, return true.\n        return true;\n    };\n}\n","\"use strict\";\n\nvar get    = require(\"lodash.get\");\nvar Errors = require(\"./Errors\");\nvar Utils  = require(\"./Utils\");\n\nfunction Report(parentOrOptions, reportOptions) {\n    this.parentReport = parentOrOptions instanceof Report ?\n                            parentOrOptions :\n                            undefined;\n\n    this.options = parentOrOptions instanceof Report ?\n                       parentOrOptions.options :\n                       parentOrOptions || {};\n\n    this.reportOptions = reportOptions || {};\n\n    this.errors = [];\n    this.path = [];\n    this.asyncTasks = [];\n}\n\nReport.prototype.isValid = function () {\n    if (this.asyncTasks.length > 0) {\n        throw new Error(\"Async tasks pending, can't answer isValid\");\n    }\n    return this.errors.length === 0;\n};\n\nReport.prototype.addAsyncTask = function (fn, args, asyncTaskResultProcessFn) {\n    this.asyncTasks.push([fn, args, asyncTaskResultProcessFn]);\n};\n\nReport.prototype.processAsyncTasks = function (timeout, callback) {\n\n    var validationTimeout = timeout || 2000,\n        tasksCount        = this.asyncTasks.length,\n        idx               = tasksCount,\n        timedOut          = false,\n        self              = this;\n\n    function finish() {\n        process.nextTick(function () {\n            var valid = self.errors.length === 0,\n                err   = valid ? undefined : self.errors;\n            callback(err, valid);\n        });\n    }\n\n    function respond(asyncTaskResultProcessFn) {\n        return function (asyncTaskResult) {\n            if (timedOut) { return; }\n            asyncTaskResultProcessFn(asyncTaskResult);\n            if (--tasksCount === 0) {\n                finish();\n            }\n        };\n    }\n\n    if (tasksCount === 0 || this.errors.length > 0) {\n        finish();\n        return;\n    }\n\n    while (idx--) {\n        var task = this.asyncTasks[idx];\n        task[0].apply(null, task[1].concat(respond(task[2])));\n    }\n\n    setTimeout(function () {\n        if (tasksCount > 0) {\n            timedOut = true;\n            self.addError(\"ASYNC_TIMEOUT\", [tasksCount, validationTimeout]);\n            callback(self.errors, false);\n        }\n    }, validationTimeout);\n\n};\n\nReport.prototype.getPath = function (returnPathAsString) {\n    var path = [];\n    if (this.parentReport) {\n        path = path.concat(this.parentReport.path);\n    }\n    path = path.concat(this.path);\n\n    if (returnPathAsString !== true) {\n        // Sanitize the path segments (http://tools.ietf.org/html/rfc6901#section-4)\n        path = \"#/\" + path.map(function (segment) {\n\n            if (Utils.isAbsoluteUri(segment)) {\n                return \"uri(\" + segment + \")\";\n            }\n\n            return segment.replace(/\\~/g, \"~0\").replace(/\\//g, \"~1\");\n        }).join(\"/\");\n    }\n    return path;\n};\n\nReport.prototype.getSchemaId = function () {\n\n    if (!this.rootSchema) {\n        return null;\n    }\n\n    // get the error path as an array\n    var path = [];\n    if (this.parentReport) {\n        path = path.concat(this.parentReport.path);\n    }\n    path = path.concat(this.path);\n\n    // try to find id in the error path\n    while (path.length > 0) {\n        var obj = get(this.rootSchema, path);\n        if (obj && obj.id) { return obj.id; }\n        path.pop();\n    }\n\n    // return id of the root\n    return this.rootSchema.id;\n};\n\nReport.prototype.hasError = function (errorCode, params) {\n    var idx = this.errors.length;\n    while (idx--) {\n        if (this.errors[idx].code === errorCode) {\n            // assume match\n            var match = true;\n\n            // check the params too\n            var idx2 = this.errors[idx].params.length;\n            while (idx2--) {\n                if (this.errors[idx].params[idx2] !== params[idx2]) {\n                    match = false;\n                }\n            }\n\n            // if match, return true\n            if (match) { return match; }\n        }\n    }\n    return false;\n};\n\nReport.prototype.addError = function (errorCode, params, subReports, schemaDescription) {\n    if (!errorCode) { throw new Error(\"No errorCode passed into addError()\"); }\n\n    this.addCustomError(errorCode, Errors[errorCode], params, subReports, schemaDescription);\n};\n\nReport.prototype.addCustomError = function (errorCode, errorMessage, params, subReports, schemaDescription) {\n    if (this.errors.length >= this.reportOptions.maxErrors) {\n        return;\n    }\n\n    if (!errorMessage) { throw new Error(\"No errorMessage known for code \" + errorCode); }\n\n    params = params || [];\n\n    var idx = params.length;\n    while (idx--) {\n        var whatIs = Utils.whatIs(params[idx]);\n        var param = (whatIs === \"object\" || whatIs === \"null\") ? JSON.stringify(params[idx]) : params[idx];\n        errorMessage = errorMessage.replace(\"{\" + idx + \"}\", param);\n    }\n\n    var err = {\n        code: errorCode,\n        params: params,\n        message: errorMessage,\n        path: this.getPath(this.options.reportPathAsArray),\n        schemaId: this.getSchemaId()\n    };\n\n    if (schemaDescription) {\n        err.description = schemaDescription;\n    }\n\n    if (subReports != null) {\n        if (!Array.isArray(subReports)) {\n            subReports = [subReports];\n        }\n        err.inner = [];\n        idx = subReports.length;\n        while (idx--) {\n            var subReport = subReports[idx],\n                idx2 = subReport.errors.length;\n            while (idx2--) {\n                err.inner.push(subReport.errors[idx2]);\n            }\n        }\n        if (err.inner.length === 0) {\n            err.inner = undefined;\n        }\n    }\n\n    this.errors.push(err);\n};\n\nmodule.exports = Report;\n","\"use strict\";\n\nvar isequal             = require(\"lodash.isequal\");\nvar Report              = require(\"./Report\");\nvar SchemaCompilation   = require(\"./SchemaCompilation\");\nvar SchemaValidation    = require(\"./SchemaValidation\");\nvar Utils               = require(\"./Utils\");\n\nfunction decodeJSONPointer(str) {\n    // http://tools.ietf.org/html/draft-ietf-appsawg-json-pointer-07#section-3\n    return decodeURIComponent(str).replace(/~[0-1]/g, function (x) {\n        return x === \"~1\" ? \"/\" : \"~\";\n    });\n}\n\nfunction getRemotePath(uri) {\n    var io = uri.indexOf(\"#\");\n    return io === -1 ? uri : uri.slice(0, io);\n}\n\nfunction getQueryPath(uri) {\n    var io = uri.indexOf(\"#\");\n    var res = io === -1 ? undefined : uri.slice(io + 1);\n    // WARN: do not slice slash, #/ means take root and go down from it\n    // if (res && res[0] === \"/\") { res = res.slice(1); }\n    return res;\n}\n\nfunction findId(schema, id) {\n    // process only arrays and objects\n    if (typeof schema !== \"object\" || schema === null) {\n        return;\n    }\n\n    // no id means root so return itself\n    if (!id) {\n        return schema;\n    }\n\n    if (schema.id) {\n        if (schema.id === id || schema.id[0] === \"#\" && schema.id.substring(1) === id) {\n            return schema;\n        }\n    }\n\n    var idx, result;\n    if (Array.isArray(schema)) {\n        idx = schema.length;\n        while (idx--) {\n            result = findId(schema[idx], id);\n            if (result) { return result; }\n        }\n    } else {\n        var keys = Object.keys(schema);\n        idx = keys.length;\n        while (idx--) {\n            var k = keys[idx];\n            if (k.indexOf(\"__$\") === 0) {\n                continue;\n            }\n            result = findId(schema[k], id);\n            if (result) { return result; }\n        }\n    }\n}\n\nexports.cacheSchemaByUri = function (uri, schema) {\n    var remotePath = getRemotePath(uri);\n    if (remotePath) {\n        this.cache[remotePath] = schema;\n    }\n};\n\nexports.removeFromCacheByUri = function (uri) {\n    var remotePath = getRemotePath(uri);\n    if (remotePath) {\n        delete this.cache[remotePath];\n    }\n};\n\nexports.checkCacheForUri = function (uri) {\n    var remotePath = getRemotePath(uri);\n    return remotePath ? this.cache[remotePath] != null : false;\n};\n\nexports.getSchema = function (report, schema) {\n    if (typeof schema === \"object\") {\n        schema = exports.getSchemaByReference.call(this, report, schema);\n    }\n    if (typeof schema === \"string\") {\n        schema = exports.getSchemaByUri.call(this, report, schema);\n    }\n    return schema;\n};\n\nexports.getSchemaByReference = function (report, key) {\n    var i = this.referenceCache.length;\n    while (i--) {\n        if (isequal(this.referenceCache[i][0], key)) {\n            return this.referenceCache[i][1];\n        }\n    }\n    // not found\n    var schema = Utils.cloneDeep(key);\n    this.referenceCache.push([key, schema]);\n    return schema;\n};\n\nexports.getSchemaByUri = function (report, uri, root) {\n    var remotePath = getRemotePath(uri),\n        queryPath = getQueryPath(uri),\n        result = remotePath ? this.cache[remotePath] : root;\n\n    if (result && remotePath) {\n        // we need to avoid compiling schemas in a recursive loop\n        var compileRemote = result !== root;\n        // now we need to compile and validate resolved schema (in case it's not already)\n        if (compileRemote) {\n\n            report.path.push(remotePath);\n\n            var remoteReport = new Report(report);\n            if (SchemaCompilation.compileSchema.call(this, remoteReport, result)) {\n                var savedOptions = this.options;\n                try {\n                    // If custom validationOptions were provided to setRemoteReference(),\n                    // use them instead of the default options\n                    this.options = result.__$validationOptions || this.options;\n                    SchemaValidation.validateSchema.call(this, remoteReport, result);\n                } finally {\n                    this.options = savedOptions;\n                }\n            }\n            var remoteReportIsValid = remoteReport.isValid();\n            if (!remoteReportIsValid) {\n                report.addError(\"REMOTE_NOT_VALID\", [uri], remoteReport);\n            }\n\n            report.path.pop();\n\n            if (!remoteReportIsValid) {\n                return undefined;\n            }\n        }\n    }\n\n    if (result && queryPath) {\n        var parts = queryPath.split(\"/\");\n        for (var idx = 0, lim = parts.length; result && idx < lim; idx++) {\n            var key = decodeJSONPointer(parts[idx]);\n            if (idx === 0) { // it's an id\n                result = findId(result, key);\n            } else { // it's a path behind id\n                result = result[key];\n            }\n        }\n    }\n\n    return result;\n};\n\nexports.getRemotePath = getRemotePath;\n","\"use strict\";\n\nvar Report      = require(\"./Report\");\nvar SchemaCache = require(\"./SchemaCache\");\nvar Utils       = require(\"./Utils\");\n\nfunction mergeReference(scope, ref) {\n    if (Utils.isAbsoluteUri(ref)) {\n        return ref;\n    }\n\n    var joinedScope = scope.join(\"\"),\n        isScopeAbsolute = Utils.isAbsoluteUri(joinedScope),\n        isScopeRelative = Utils.isRelativeUri(joinedScope),\n        isRefRelative = Utils.isRelativeUri(ref),\n        toRemove;\n\n    if (isScopeAbsolute && isRefRelative) {\n        toRemove = joinedScope.match(/\\/[^\\/]*$/);\n        if (toRemove) {\n            joinedScope = joinedScope.slice(0, toRemove.index + 1);\n        }\n    } else if (isScopeRelative && isRefRelative) {\n        joinedScope = \"\";\n    } else {\n        toRemove = joinedScope.match(/[^#/]+$/);\n        if (toRemove) {\n            joinedScope = joinedScope.slice(0, toRemove.index);\n        }\n    }\n\n    var res = joinedScope + ref;\n    res = res.replace(/##/, \"#\");\n    return res;\n}\n\nfunction collectReferences(obj, results, scope, path) {\n    results = results || [];\n    scope = scope || [];\n    path = path || [];\n\n    if (typeof obj !== \"object\" || obj === null) {\n        return results;\n    }\n\n    if (typeof obj.id === \"string\") {\n        scope.push(obj.id);\n    }\n\n    if (typeof obj.$ref === \"string\" && typeof obj.__$refResolved === \"undefined\") {\n        results.push({\n            ref: mergeReference(scope, obj.$ref),\n            key: \"$ref\",\n            obj: obj,\n            path: path.slice(0)\n        });\n    }\n    if (typeof obj.$schema === \"string\" && typeof obj.__$schemaResolved === \"undefined\") {\n        results.push({\n            ref: mergeReference(scope, obj.$schema),\n            key: \"$schema\",\n            obj: obj,\n            path: path.slice(0)\n        });\n    }\n\n    var idx;\n    if (Array.isArray(obj)) {\n        idx = obj.length;\n        while (idx--) {\n            path.push(idx.toString());\n            collectReferences(obj[idx], results, scope, path);\n            path.pop();\n        }\n    } else {\n        var keys = Object.keys(obj);\n        idx = keys.length;\n        while (idx--) {\n            // do not recurse through resolved references and other z-schema props\n            if (keys[idx].indexOf(\"__$\") === 0) { continue; }\n            path.push(keys[idx]);\n            collectReferences(obj[keys[idx]], results, scope, path);\n            path.pop();\n        }\n    }\n\n    if (typeof obj.id === \"string\") {\n        scope.pop();\n    }\n\n    return results;\n}\n\nvar compileArrayOfSchemasLoop = function (mainReport, arr) {\n    var idx = arr.length,\n        compiledCount = 0;\n\n    while (idx--) {\n\n        // try to compile each schema separately\n        var report = new Report(mainReport);\n        var isValid = exports.compileSchema.call(this, report, arr[idx]);\n        if (isValid) { compiledCount++; }\n\n        // copy errors to report\n        mainReport.errors = mainReport.errors.concat(report.errors);\n\n    }\n\n    return compiledCount;\n};\n\nfunction findId(arr, id) {\n    var idx = arr.length;\n    while (idx--) {\n        if (arr[idx].id === id) {\n            return arr[idx];\n        }\n    }\n    return null;\n}\n\nvar compileArrayOfSchemas = function (report, arr) {\n\n    var compiled = 0,\n        lastLoopCompiled;\n\n    do {\n\n        // remove all UNRESOLVABLE_REFERENCE errors before compiling array again\n        var idx = report.errors.length;\n        while (idx--) {\n            if (report.errors[idx].code === \"UNRESOLVABLE_REFERENCE\") {\n                report.errors.splice(idx, 1);\n            }\n        }\n\n        // remember how many were compiled in the last loop\n        lastLoopCompiled = compiled;\n\n        // count how many are compiled now\n        compiled = compileArrayOfSchemasLoop.call(this, report, arr);\n\n        // fix __$missingReferences if possible\n        idx = arr.length;\n        while (idx--) {\n            var sch = arr[idx];\n            if (sch.__$missingReferences) {\n                var idx2 = sch.__$missingReferences.length;\n                while (idx2--) {\n                    var refObj = sch.__$missingReferences[idx2];\n                    var response = findId(arr, refObj.ref);\n                    if (response) {\n                        // this might create circular references\n                        refObj.obj[\"__\" + refObj.key + \"Resolved\"] = response;\n                        // it's resolved now so delete it\n                        sch.__$missingReferences.splice(idx2, 1);\n                    }\n                }\n                if (sch.__$missingReferences.length === 0) {\n                    delete sch.__$missingReferences;\n                }\n            }\n        }\n\n        // keep repeating if not all compiled and at least one more was compiled in the last loop\n    } while (compiled !== arr.length && compiled !== lastLoopCompiled);\n\n    return report.isValid();\n\n};\n\nexports.compileSchema = function (report, schema) {\n\n    report.commonErrorMessage = \"SCHEMA_COMPILATION_FAILED\";\n\n    // if schema is a string, assume it's a uri\n    if (typeof schema === \"string\") {\n        var loadedSchema = SchemaCache.getSchemaByUri.call(this, report, schema);\n        if (!loadedSchema) {\n            report.addError(\"SCHEMA_NOT_REACHABLE\", [schema]);\n            return false;\n        }\n        schema = loadedSchema;\n    }\n\n    // if schema is an array, assume it's an array of schemas\n    if (Array.isArray(schema)) {\n        return compileArrayOfSchemas.call(this, report, schema);\n    }\n\n    // if we have an id than it should be cached already (if this instance has compiled it)\n    if (schema.__$compiled && schema.id && SchemaCache.checkCacheForUri.call(this, schema.id) === false) {\n        schema.__$compiled = undefined;\n    }\n\n    // do not re-compile schemas\n    if (schema.__$compiled) {\n        return true;\n    }\n\n    if (schema.id && typeof schema.id === \"string\") {\n        // add this to our schemaCache (before compilation in case we have references including id)\n        SchemaCache.cacheSchemaByUri.call(this, schema.id, schema);\n    }\n\n    // this method can be called recursively, so we need to remember our root\n    var isRoot = false;\n    if (!report.rootSchema) {\n        report.rootSchema = schema;\n        isRoot = true;\n    }\n\n    // delete all __$missingReferences from previous compilation attempts\n    var isValidExceptReferences = report.isValid();\n    delete schema.__$missingReferences;\n\n    // collect all references that need to be resolved - $ref and $schema\n    var refs = collectReferences.call(this, schema),\n        idx = refs.length;\n    while (idx--) {\n        // resolve all the collected references into __xxxResolved pointer\n        var refObj = refs[idx];\n        var response = SchemaCache.getSchemaByUri.call(this, report, refObj.ref, schema);\n\n        // we can try to use custom schemaReader if available\n        if (!response) {\n            var schemaReader = this.getSchemaReader();\n            if (schemaReader) {\n                // it's supposed to return a valid schema\n                var s = schemaReader(refObj.ref);\n                if (s) {\n                    // it needs to have the id\n                    s.id = refObj.ref;\n                    // try to compile the schema\n                    var subreport = new Report(report);\n                    if (!exports.compileSchema.call(this, subreport, s)) {\n                        // copy errors to report\n                        report.errors = report.errors.concat(subreport.errors);\n                    } else {\n                        response = SchemaCache.getSchemaByUri.call(this, report, refObj.ref, schema);\n                    }\n                }\n            }\n        }\n\n        if (!response) {\n\n            var hasNotValid = report.hasError(\"REMOTE_NOT_VALID\", [refObj.ref]);\n            var isAbsolute = Utils.isAbsoluteUri(refObj.ref);\n            var isDownloaded = false;\n            var ignoreUnresolvableRemotes = this.options.ignoreUnresolvableReferences === true;\n\n            if (isAbsolute) {\n                // we shouldn't add UNRESOLVABLE_REFERENCE for schemas we already have downloaded\n                // and set through setRemoteReference method\n                isDownloaded = SchemaCache.checkCacheForUri.call(this, refObj.ref);\n            }\n\n            if (hasNotValid) {\n                // already has REMOTE_NOT_VALID error for this one\n            } else if (ignoreUnresolvableRemotes && isAbsolute) {\n                // ignoreUnresolvableRemotes is on and remote isAbsolute\n            } else if (isDownloaded) {\n                // remote is downloaded, so no UNRESOLVABLE_REFERENCE\n            } else {\n                Array.prototype.push.apply(report.path, refObj.path);\n                report.addError(\"UNRESOLVABLE_REFERENCE\", [refObj.ref]);\n                report.path = report.path.slice(0, -refObj.path.length);\n\n                // pusblish unresolved references out\n                if (isValidExceptReferences) {\n                    schema.__$missingReferences = schema.__$missingReferences || [];\n                    schema.__$missingReferences.push(refObj);\n                }\n            }\n        }\n        // this might create circular references\n        refObj.obj[\"__\" + refObj.key + \"Resolved\"] = response;\n    }\n\n    var isValid = report.isValid();\n    if (isValid) {\n        schema.__$compiled = true;\n    } else {\n        if (schema.id && typeof schema.id === \"string\") {\n            // remove this schema from schemaCache because it failed to compile\n            SchemaCache.removeFromCacheByUri.call(this, schema.id);\n        }\n    }\n\n    // we don't need the root pointer anymore\n    if (isRoot) {\n        report.rootSchema = undefined;\n    }\n\n    return isValid;\n\n};\n","\"use strict\";\n\nvar FormatValidators = require(\"./FormatValidators\"),\n    JsonValidation   = require(\"./JsonValidation\"),\n    Report           = require(\"./Report\"),\n    Utils            = require(\"./Utils\");\n\nvar SchemaValidators = {\n    $ref: function (report, schema) {\n        // http://tools.ietf.org/html/draft-ietf-appsawg-json-pointer-07\n        // http://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03\n        if (typeof schema.$ref !== \"string\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"$ref\", \"string\"]);\n        }\n    },\n    $schema: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-core.html#rfc.section.6\n        if (typeof schema.$schema !== \"string\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"$schema\", \"string\"]);\n        }\n    },\n    multipleOf: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.1.1\n        if (typeof schema.multipleOf !== \"number\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"multipleOf\", \"number\"]);\n        } else if (schema.multipleOf <= 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"multipleOf\", \"strictly greater than 0\"]);\n        }\n    },\n    maximum: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.2.1\n        if (typeof schema.maximum !== \"number\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"maximum\", \"number\"]);\n        }\n    },\n    exclusiveMaximum: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.2.1\n        if (typeof schema.exclusiveMaximum !== \"boolean\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"exclusiveMaximum\", \"boolean\"]);\n        } else if (schema.maximum === undefined) {\n            report.addError(\"KEYWORD_DEPENDENCY\", [\"exclusiveMaximum\", \"maximum\"]);\n        }\n    },\n    minimum: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.3.1\n        if (typeof schema.minimum !== \"number\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"minimum\", \"number\"]);\n        }\n    },\n    exclusiveMinimum: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.3.1\n        if (typeof schema.exclusiveMinimum !== \"boolean\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"exclusiveMinimum\", \"boolean\"]);\n        } else if (schema.minimum === undefined) {\n            report.addError(\"KEYWORD_DEPENDENCY\", [\"exclusiveMinimum\", \"minimum\"]);\n        }\n    },\n    maxLength: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.1.1\n        if (Utils.whatIs(schema.maxLength) !== \"integer\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"maxLength\", \"integer\"]);\n        } else if (schema.maxLength < 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"maxLength\", \"greater than, or equal to 0\"]);\n        }\n    },\n    minLength: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.2.1\n        if (Utils.whatIs(schema.minLength) !== \"integer\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"minLength\", \"integer\"]);\n        } else if (schema.minLength < 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"minLength\", \"greater than, or equal to 0\"]);\n        }\n    },\n    pattern: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.2.3.1\n        if (typeof schema.pattern !== \"string\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"pattern\", \"string\"]);\n        } else {\n            try {\n                RegExp(schema.pattern);\n            } catch (e) {\n                report.addError(\"KEYWORD_PATTERN\", [\"pattern\", schema.pattern]);\n            }\n        }\n    },\n    additionalItems: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.1.1\n        var type = Utils.whatIs(schema.additionalItems);\n        if (type !== \"boolean\" && type !== \"object\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"additionalItems\", [\"boolean\", \"object\"]]);\n        } else if (type === \"object\") {\n            report.path.push(\"additionalItems\");\n            exports.validateSchema.call(this, report, schema.additionalItems);\n            report.path.pop();\n        }\n    },\n    items: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.1.1\n        var type = Utils.whatIs(schema.items);\n\n        if (type === \"object\") {\n            report.path.push(\"items\");\n            exports.validateSchema.call(this, report, schema.items);\n            report.path.pop();\n        } else if (type === \"array\") {\n            var idx = schema.items.length;\n            while (idx--) {\n                report.path.push(\"items\");\n                report.path.push(idx.toString());\n                exports.validateSchema.call(this, report, schema.items[idx]);\n                report.path.pop();\n                report.path.pop();\n            }\n        } else {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"items\", [\"array\", \"object\"]]);\n        }\n\n        // custom - strict mode\n        if (this.options.forceAdditional === true && schema.additionalItems === undefined && Array.isArray(schema.items)) {\n            report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"additionalItems\"]);\n        }\n        // custome - assume defined false mode\n        if (this.options.assumeAdditional && schema.additionalItems === undefined && Array.isArray(schema.items)) {\n            schema.additionalItems = false;\n        }\n    },\n    maxItems: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.2.1\n        if (typeof schema.maxItems !== \"number\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"maxItems\", \"integer\"]);\n        } else if (schema.maxItems < 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"maxItems\", \"greater than, or equal to 0\"]);\n        }\n    },\n    minItems: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.3.1\n        if (Utils.whatIs(schema.minItems) !== \"integer\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"minItems\", \"integer\"]);\n        } else if (schema.minItems < 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"minItems\", \"greater than, or equal to 0\"]);\n        }\n    },\n    uniqueItems: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.3.4.1\n        if (typeof schema.uniqueItems !== \"boolean\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"uniqueItems\", \"boolean\"]);\n        }\n    },\n    maxProperties: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.1.1\n        if (Utils.whatIs(schema.maxProperties) !== \"integer\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"maxProperties\", \"integer\"]);\n        } else if (schema.maxProperties < 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"maxProperties\", \"greater than, or equal to 0\"]);\n        }\n    },\n    minProperties: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.2.1\n        if (Utils.whatIs(schema.minProperties) !== \"integer\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"minProperties\", \"integer\"]);\n        } else if (schema.minProperties < 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"minProperties\", \"greater than, or equal to 0\"]);\n        }\n    },\n    required: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.3.1\n        if (Utils.whatIs(schema.required) !== \"array\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"required\", \"array\"]);\n        } else if (schema.required.length === 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"required\", \"an array with at least one element\"]);\n        } else {\n            var idx = schema.required.length;\n            while (idx--) {\n                if (typeof schema.required[idx] !== \"string\") {\n                    report.addError(\"KEYWORD_VALUE_TYPE\", [\"required\", \"string\"]);\n                }\n            }\n            if (Utils.isUniqueArray(schema.required) === false) {\n                report.addError(\"KEYWORD_MUST_BE\", [\"required\", \"an array with unique items\"]);\n            }\n        }\n    },\n    additionalProperties: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.1\n        var type = Utils.whatIs(schema.additionalProperties);\n        if (type !== \"boolean\" && type !== \"object\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"additionalProperties\", [\"boolean\", \"object\"]]);\n        } else if (type === \"object\") {\n            report.path.push(\"additionalProperties\");\n            exports.validateSchema.call(this, report, schema.additionalProperties);\n            report.path.pop();\n        }\n    },\n    properties: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.1\n        if (Utils.whatIs(schema.properties) !== \"object\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"properties\", \"object\"]);\n            return;\n        }\n\n        var keys = Object.keys(schema.properties),\n            idx = keys.length;\n        while (idx--) {\n            var key = keys[idx],\n                val = schema.properties[key];\n            report.path.push(\"properties\");\n            report.path.push(key);\n            exports.validateSchema.call(this, report, val);\n            report.path.pop();\n            report.path.pop();\n        }\n\n        // custom - strict mode\n        if (this.options.forceAdditional === true && schema.additionalProperties === undefined) {\n            report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"additionalProperties\"]);\n        }\n        // custome - assume defined false mode\n        if (this.options.assumeAdditional && schema.additionalProperties === undefined) {\n            schema.additionalProperties = false;\n        }\n        // custom - forceProperties\n        if (this.options.forceProperties === true && keys.length === 0) {\n            report.addError(\"CUSTOM_MODE_FORCE_PROPERTIES\", [\"properties\"]);\n        }\n    },\n    patternProperties: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.4.1\n        if (Utils.whatIs(schema.patternProperties) !== \"object\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"patternProperties\", \"object\"]);\n            return;\n        }\n\n        var keys = Object.keys(schema.patternProperties),\n            idx = keys.length;\n        while (idx--) {\n            var key = keys[idx],\n                val = schema.patternProperties[key];\n            try {\n                RegExp(key);\n            } catch (e) {\n                report.addError(\"KEYWORD_PATTERN\", [\"patternProperties\", key]);\n            }\n            report.path.push(\"patternProperties\");\n            report.path.push(key.toString());\n            exports.validateSchema.call(this, report, val);\n            report.path.pop();\n            report.path.pop();\n        }\n\n        // custom - forceProperties\n        if (this.options.forceProperties === true && keys.length === 0) {\n            report.addError(\"CUSTOM_MODE_FORCE_PROPERTIES\", [\"patternProperties\"]);\n        }\n    },\n    dependencies: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.4.5.1\n        if (Utils.whatIs(schema.dependencies) !== \"object\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"dependencies\", \"object\"]);\n        } else {\n            var keys = Object.keys(schema.dependencies),\n                idx = keys.length;\n            while (idx--) {\n                var schemaKey = keys[idx],\n                    schemaDependency = schema.dependencies[schemaKey],\n                    type = Utils.whatIs(schemaDependency);\n\n                if (type === \"object\") {\n                    report.path.push(\"dependencies\");\n                    report.path.push(schemaKey);\n                    exports.validateSchema.call(this, report, schemaDependency);\n                    report.path.pop();\n                    report.path.pop();\n                } else if (type === \"array\") {\n                    var idx2 = schemaDependency.length;\n                    if (idx2 === 0) {\n                        report.addError(\"KEYWORD_MUST_BE\", [\"dependencies\", \"not empty array\"]);\n                    }\n                    while (idx2--) {\n                        if (typeof schemaDependency[idx2] !== \"string\") {\n                            report.addError(\"KEYWORD_VALUE_TYPE\", [\"dependensices\", \"string\"]);\n                        }\n                    }\n                    if (Utils.isUniqueArray(schemaDependency) === false) {\n                        report.addError(\"KEYWORD_MUST_BE\", [\"dependencies\", \"an array with unique items\"]);\n                    }\n                } else {\n                    report.addError(\"KEYWORD_VALUE_TYPE\", [\"dependencies\", \"object or array\"]);\n                }\n            }\n        }\n    },\n    enum: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.1.1\n        if (Array.isArray(schema.enum) === false) {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"enum\", \"array\"]);\n        } else if (schema.enum.length === 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"enum\", \"an array with at least one element\"]);\n        } else if (Utils.isUniqueArray(schema.enum) === false) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"enum\", \"an array with unique elements\"]);\n        }\n    },\n    type: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.2.1\n        var primitiveTypes = [\"array\", \"boolean\", \"integer\", \"number\", \"null\", \"object\", \"string\"],\n            primitiveTypeStr = primitiveTypes.join(\",\"),\n            isArray = Array.isArray(schema.type);\n\n        if (isArray) {\n            var idx = schema.type.length;\n            while (idx--) {\n                if (primitiveTypes.indexOf(schema.type[idx]) === -1) {\n                    report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"type\", primitiveTypeStr]);\n                }\n            }\n            if (Utils.isUniqueArray(schema.type) === false) {\n                report.addError(\"KEYWORD_MUST_BE\", [\"type\", \"an object with unique properties\"]);\n            }\n        } else if (typeof schema.type === \"string\") {\n            if (primitiveTypes.indexOf(schema.type) === -1) {\n                report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"type\", primitiveTypeStr]);\n            }\n        } else {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"type\", [\"string\", \"array\"]]);\n        }\n\n        if (this.options.noEmptyStrings === true) {\n            if (schema.type === \"string\" || isArray && schema.type.indexOf(\"string\") !== -1) {\n                if (schema.minLength === undefined &&\n                    schema.enum === undefined &&\n                    schema.format === undefined) {\n\n                    schema.minLength = 1;\n                }\n            }\n        }\n        if (this.options.noEmptyArrays === true) {\n            if (schema.type === \"array\" || isArray && schema.type.indexOf(\"array\") !== -1) {\n                if (schema.minItems === undefined) {\n                    schema.minItems = 1;\n                }\n            }\n        }\n        if (this.options.forceProperties === true) {\n            if (schema.type === \"object\" || isArray && schema.type.indexOf(\"object\") !== -1) {\n                if (schema.properties === undefined && schema.patternProperties === undefined) {\n                    report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"properties\"]);\n                }\n            }\n        }\n        if (this.options.forceItems === true) {\n            if (schema.type === \"array\" || isArray && schema.type.indexOf(\"array\") !== -1) {\n                if (schema.items === undefined) {\n                    report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"items\"]);\n                }\n            }\n        }\n        if (this.options.forceMinItems === true) {\n            if (schema.type === \"array\" || isArray && schema.type.indexOf(\"array\") !== -1) {\n                if (schema.minItems === undefined) {\n                    report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"minItems\"]);\n                }\n            }\n        }\n        if (this.options.forceMaxItems === true) {\n            if (schema.type === \"array\" || isArray && schema.type.indexOf(\"array\") !== -1) {\n                if (schema.maxItems === undefined) {\n                    report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"maxItems\"]);\n                }\n            }\n        }\n        if (this.options.forceMinLength === true) {\n            if (schema.type === \"string\" || isArray && schema.type.indexOf(\"string\") !== -1) {\n                if (schema.minLength === undefined &&\n                    schema.format === undefined &&\n                    schema.enum === undefined &&\n                    schema.pattern === undefined) {\n                    report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"minLength\"]);\n                }\n            }\n        }\n        if (this.options.forceMaxLength === true) {\n            if (schema.type === \"string\" || isArray && schema.type.indexOf(\"string\") !== -1) {\n                if (schema.maxLength === undefined &&\n                    schema.format === undefined &&\n                    schema.enum === undefined &&\n                    schema.pattern === undefined) {\n                    report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"maxLength\"]);\n                }\n            }\n        }\n    },\n    allOf: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.3.1\n        if (Array.isArray(schema.allOf) === false) {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"allOf\", \"array\"]);\n        } else if (schema.allOf.length === 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"allOf\", \"an array with at least one element\"]);\n        } else {\n            var idx = schema.allOf.length;\n            while (idx--) {\n                report.path.push(\"allOf\");\n                report.path.push(idx.toString());\n                exports.validateSchema.call(this, report, schema.allOf[idx]);\n                report.path.pop();\n                report.path.pop();\n            }\n        }\n    },\n    anyOf: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.4.1\n        if (Array.isArray(schema.anyOf) === false) {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"anyOf\", \"array\"]);\n        } else if (schema.anyOf.length === 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"anyOf\", \"an array with at least one element\"]);\n        } else {\n            var idx = schema.anyOf.length;\n            while (idx--) {\n                report.path.push(\"anyOf\");\n                report.path.push(idx.toString());\n                exports.validateSchema.call(this, report, schema.anyOf[idx]);\n                report.path.pop();\n                report.path.pop();\n            }\n        }\n    },\n    oneOf: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.5.1\n        if (Array.isArray(schema.oneOf) === false) {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"oneOf\", \"array\"]);\n        } else if (schema.oneOf.length === 0) {\n            report.addError(\"KEYWORD_MUST_BE\", [\"oneOf\", \"an array with at least one element\"]);\n        } else {\n            var idx = schema.oneOf.length;\n            while (idx--) {\n                report.path.push(\"oneOf\");\n                report.path.push(idx.toString());\n                exports.validateSchema.call(this, report, schema.oneOf[idx]);\n                report.path.pop();\n                report.path.pop();\n            }\n        }\n    },\n    not: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.6.1\n        if (Utils.whatIs(schema.not) !== \"object\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"not\", \"object\"]);\n        } else {\n            report.path.push(\"not\");\n            exports.validateSchema.call(this, report, schema.not);\n            report.path.pop();\n        }\n    },\n    definitions: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.5.7.1\n        if (Utils.whatIs(schema.definitions) !== \"object\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"definitions\", \"object\"]);\n        } else {\n            var keys = Object.keys(schema.definitions),\n                idx = keys.length;\n            while (idx--) {\n                var key = keys[idx],\n                    val = schema.definitions[key];\n                report.path.push(\"definitions\");\n                report.path.push(key);\n                exports.validateSchema.call(this, report, val);\n                report.path.pop();\n                report.path.pop();\n            }\n        }\n    },\n    format: function (report, schema) {\n        if (typeof schema.format !== \"string\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"format\", \"string\"]);\n        } else {\n            if (FormatValidators[schema.format] === undefined && this.options.ignoreUnknownFormats !== true) {\n                report.addError(\"UNKNOWN_FORMAT\", [schema.format]);\n            }\n        }\n    },\n    id: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-core.html#rfc.section.7.2\n        if (typeof schema.id !== \"string\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"id\", \"string\"]);\n        }\n    },\n    title: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.6.1\n        if (typeof schema.title !== \"string\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"title\", \"string\"]);\n        }\n    },\n    description: function (report, schema) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.6.1\n        if (typeof schema.description !== \"string\") {\n            report.addError(\"KEYWORD_TYPE_EXPECTED\", [\"description\", \"string\"]);\n        }\n    },\n    \"default\": function (/* report, schema */) {\n        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.6.2\n        // There are no restrictions placed on the value of this keyword.\n    }\n};\n\nvar validateArrayOfSchemas = function (report, arr) {\n    var idx = arr.length;\n    while (idx--) {\n        exports.validateSchema.call(this, report, arr[idx]);\n    }\n    return report.isValid();\n};\n\nexports.validateSchema = function (report, schema) {\n\n    report.commonErrorMessage = \"SCHEMA_VALIDATION_FAILED\";\n\n    // if schema is an array, assume it's an array of schemas\n    if (Array.isArray(schema)) {\n        return validateArrayOfSchemas.call(this, report, schema);\n    }\n\n    // do not revalidate schema that has already been validated once\n    if (schema.__$validated) {\n        return true;\n    }\n\n    // if $schema is present, this schema should validate against that $schema\n    var hasParentSchema = schema.$schema && schema.id !== schema.$schema;\n    if (hasParentSchema) {\n        if (schema.__$schemaResolved && schema.__$schemaResolved !== schema) {\n            var subReport = new Report(report);\n            var valid = JsonValidation.validate.call(this, subReport, schema.__$schemaResolved, schema);\n            if (valid === false) {\n                report.addError(\"PARENT_SCHEMA_VALIDATION_FAILED\", null, subReport);\n            }\n        } else {\n            if (this.options.ignoreUnresolvableReferences !== true) {\n                report.addError(\"REF_UNRESOLVED\", [schema.$schema]);\n            }\n        }\n    }\n\n    if (this.options.noTypeless === true) {\n        // issue #36 - inherit type to anyOf, oneOf, allOf if noTypeless is defined\n        if (schema.type !== undefined) {\n            var schemas = [];\n            if (Array.isArray(schema.anyOf)) { schemas = schemas.concat(schema.anyOf); }\n            if (Array.isArray(schema.oneOf)) { schemas = schemas.concat(schema.oneOf); }\n            if (Array.isArray(schema.allOf)) { schemas = schemas.concat(schema.allOf); }\n            schemas.forEach(function (sch) {\n                if (!sch.type) { sch.type = schema.type; }\n            });\n        }\n        // end issue #36\n        if (schema.enum === undefined &&\n            schema.type === undefined &&\n            schema.anyOf === undefined &&\n            schema.oneOf === undefined &&\n            schema.not === undefined &&\n            schema.$ref === undefined) {\n            report.addError(\"KEYWORD_UNDEFINED_STRICT\", [\"type\"]);\n        }\n    }\n\n    var keys = Object.keys(schema),\n        idx = keys.length;\n    while (idx--) {\n        var key = keys[idx];\n        if (key.indexOf(\"__\") === 0) { continue; }\n        if (SchemaValidators[key] !== undefined) {\n            SchemaValidators[key].call(this, report, schema);\n        } else if (!hasParentSchema) {\n            if (this.options.noExtraKeywords === true) {\n                report.addError(\"KEYWORD_UNEXPECTED\", [key]);\n            }\n        }\n    }\n\n    if (this.options.pedanticCheck === true) {\n        if (schema.enum) {\n            // break recursion\n            var tmpSchema = Utils.clone(schema);\n            delete tmpSchema.enum;\n            delete tmpSchema.default;\n\n            report.path.push(\"enum\");\n            idx = schema.enum.length;\n            while (idx--) {\n                report.path.push(idx.toString());\n                JsonValidation.validate.call(this, report, tmpSchema, schema.enum[idx]);\n                report.path.pop();\n            }\n            report.path.pop();\n        }\n\n        if (schema.default) {\n            report.path.push(\"default\");\n            JsonValidation.validate.call(this, report, schema, schema.default);\n            report.path.pop();\n        }\n    }\n\n    var isValid = report.isValid();\n    if (isValid) {\n        schema.__$validated = true;\n    }\n    return isValid;\n};\n","\"use strict\";\n\nexports.isAbsoluteUri = function (uri) {\n    return /^https?:\\/\\//.test(uri);\n};\n\nexports.isRelativeUri = function (uri) {\n    // relative URIs that end with a hash sign, issue #56\n    return /.+#/.test(uri);\n};\n\nexports.whatIs = function (what) {\n\n    var to = typeof what;\n\n    if (to === \"object\") {\n        if (what === null) {\n            return \"null\";\n        }\n        if (Array.isArray(what)) {\n            return \"array\";\n        }\n        return \"object\"; // typeof what === 'object' && what === Object(what) && !Array.isArray(what);\n    }\n\n    if (to === \"number\") {\n        if (Number.isFinite(what)) {\n            if (what % 1 === 0) {\n                return \"integer\";\n            } else {\n                return \"number\";\n            }\n        }\n        if (Number.isNaN(what)) {\n            return \"not-a-number\";\n        }\n        return \"unknown-number\";\n    }\n\n    return to; // undefined, boolean, string, function\n\n};\n\nexports.areEqual = function areEqual(json1, json2) {\n    // http://json-schema.org/latest/json-schema-core.html#rfc.section.3.6\n\n    // Two JSON values are said to be equal if and only if:\n    // both are nulls; or\n    // both are booleans, and have the same value; or\n    // both are strings, and have the same value; or\n    // both are numbers, and have the same mathematical value; or\n    if (json1 === json2) {\n        return true;\n    }\n\n    var i, len;\n\n    // both are arrays, and:\n    if (Array.isArray(json1) && Array.isArray(json2)) {\n        // have the same number of items; and\n        if (json1.length !== json2.length) {\n            return false;\n        }\n        // items at the same index are equal according to this definition; or\n        len = json1.length;\n        for (i = 0; i < len; i++) {\n            if (!areEqual(json1[i], json2[i])) {\n                return false;\n            }\n        }\n        return true;\n    }\n\n    // both are objects, and:\n    if (exports.whatIs(json1) === \"object\" && exports.whatIs(json2) === \"object\") {\n        // have the same set of property names; and\n        var keys1 = Object.keys(json1);\n        var keys2 = Object.keys(json2);\n        if (!areEqual(keys1, keys2)) {\n            return false;\n        }\n        // values for a same property name are equal according to this definition.\n        len = keys1.length;\n        for (i = 0; i < len; i++) {\n            if (!areEqual(json1[keys1[i]], json2[keys1[i]])) {\n                return false;\n            }\n        }\n        return true;\n    }\n\n    return false;\n};\n\nexports.isUniqueArray = function (arr, indexes) {\n    var i, j, l = arr.length;\n    for (i = 0; i < l; i++) {\n        for (j = i + 1; j < l; j++) {\n            if (exports.areEqual(arr[i], arr[j])) {\n                if (indexes) { indexes.push(i, j); }\n                return false;\n            }\n        }\n    }\n    return true;\n};\n\nexports.difference = function (bigSet, subSet) {\n    var arr = [],\n        idx = bigSet.length;\n    while (idx--) {\n        if (subSet.indexOf(bigSet[idx]) === -1) {\n            arr.push(bigSet[idx]);\n        }\n    }\n    return arr;\n};\n\n// NOT a deep version of clone\nexports.clone = function (src) {\n    if (typeof src === \"undefined\") { return void 0; }\n    if (typeof src !== \"object\" || src === null) { return src; }\n    var res, idx;\n    if (Array.isArray(src)) {\n        res = [];\n        idx = src.length;\n        while (idx--) {\n            res[idx] = src[idx];\n        }\n    } else {\n        res = {};\n        var keys = Object.keys(src);\n        idx = keys.length;\n        while (idx--) {\n            var key = keys[idx];\n            res[key] = src[key];\n        }\n    }\n    return res;\n};\n\nexports.cloneDeep = function (src) {\n    var visited = [], cloned = [];\n    function cloneDeep(src) {\n        if (typeof src !== \"object\" || src === null) { return src; }\n        var res, idx, cidx;\n\n        cidx = visited.indexOf(src);\n        if (cidx !== -1) { return cloned[cidx]; }\n\n        visited.push(src);\n        if (Array.isArray(src)) {\n            res = [];\n            cloned.push(res);\n            idx = src.length;\n            while (idx--) {\n                res[idx] = cloneDeep(src[idx]);\n            }\n        } else {\n            res = {};\n            cloned.push(res);\n            var keys = Object.keys(src);\n            idx = keys.length;\n            while (idx--) {\n                var key = keys[idx];\n                res[key] = cloneDeep(src[key]);\n            }\n        }\n        return res;\n    }\n    return cloneDeep(src);\n};\n\n/*\n  following function comes from punycode.js library\n  see: https://github.com/bestiejs/punycode.js\n*/\n/*jshint -W016*/\n/**\n * Creates an array containing the numeric code points of each Unicode\n * character in the string. While JavaScript uses UCS-2 internally,\n * this function will convert a pair of surrogate halves (each of which\n * UCS-2 exposes as separate characters) into a single code point,\n * matching UTF-16.\n * @see `punycode.ucs2.encode`\n * @see <https://mathiasbynens.be/notes/javascript-encoding>\n * @memberOf punycode.ucs2\n * @name decode\n * @param {String} string The Unicode input string (UCS-2).\n * @returns {Array} The new array of code points.\n */\nexports.ucs2decode = function (string) {\n    var output = [],\n        counter = 0,\n        length = string.length,\n        value,\n        extra;\n    while (counter < length) {\n        value = string.charCodeAt(counter++);\n        if (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n            // high surrogate, and there is a next character\n            extra = string.charCodeAt(counter++);\n            if ((extra & 0xFC00) == 0xDC00) { // low surrogate\n                output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n            } else {\n                // unmatched surrogate; only append this code unit, in case the next\n                // code unit is the high surrogate of a surrogate pair\n                output.push(value);\n                counter--;\n            }\n        } else {\n            output.push(value);\n        }\n    }\n    return output;\n};\n/*jshint +W016*/\n","\"use strict\";\n\nrequire(\"./Polyfills\");\nvar get               = require(\"lodash.get\");\nvar Report            = require(\"./Report\");\nvar FormatValidators  = require(\"./FormatValidators\");\nvar JsonValidation    = require(\"./JsonValidation\");\nvar SchemaCache       = require(\"./SchemaCache\");\nvar SchemaCompilation = require(\"./SchemaCompilation\");\nvar SchemaValidation  = require(\"./SchemaValidation\");\nvar Utils             = require(\"./Utils\");\nvar Draft4Schema      = require(\"./schemas/schema.json\");\nvar Draft4HyperSchema = require(\"./schemas/hyper-schema.json\");\n\n/*\n    default options\n*/\nvar defaultOptions = {\n    // default timeout for all async tasks\n    asyncTimeout: 2000,\n    // force additionalProperties and additionalItems to be defined on \"object\" and \"array\" types\n    forceAdditional: false,\n    // assume additionalProperties and additionalItems are defined as \"false\" where appropriate\n    assumeAdditional: false,\n    // force items to be defined on \"array\" types\n    forceItems: false,\n    // force minItems to be defined on \"array\" types\n    forceMinItems: false,\n    // force maxItems to be defined on \"array\" types\n    forceMaxItems: false,\n    // force minLength to be defined on \"string\" types\n    forceMinLength: false,\n    // force maxLength to be defined on \"string\" types\n    forceMaxLength: false,\n    // force properties or patternProperties to be defined on \"object\" types\n    forceProperties: false,\n    // ignore references that cannot be resolved (remote schemas) // TODO: make sure this is only for remote schemas, not local ones\n    ignoreUnresolvableReferences: false,\n    // disallow usage of keywords that this validator can't handle\n    noExtraKeywords: false,\n    // disallow usage of schema's without \"type\" defined\n    noTypeless: false,\n    // disallow zero length strings in validated objects\n    noEmptyStrings: false,\n    // disallow zero length arrays in validated objects\n    noEmptyArrays: false,\n    // forces \"uri\" format to be in fully rfc3986 compliant\n    strictUris: false,\n    // turn on some of the above\n    strictMode: false,\n    // report error paths as an array of path segments to get to the offending node\n    reportPathAsArray: false,\n    // stops validation as soon as an error is found, true by default but can be turned off\n    breakOnFirstError: true,\n    // check if schema follow best practices and common sence\n    pedanticCheck: false,\n    // ignore unknown formats (do not report them as an error)\n    ignoreUnknownFormats: false,\n    // function to be called on every schema\n    customValidator: null\n};\n\nfunction normalizeOptions(options) {\n    var normalized;\n\n    // options\n    if (typeof options === \"object\") {\n        var keys = Object.keys(options),\n            idx = keys.length,\n            key;\n\n        // check that the options are correctly configured\n        while (idx--) {\n            key = keys[idx];\n            if (defaultOptions[key] === undefined) {\n                throw new Error(\"Unexpected option passed to constructor: \" + key);\n            }\n        }\n\n        // copy the default options into passed options\n        keys = Object.keys(defaultOptions);\n        idx = keys.length;\n        while (idx--) {\n            key = keys[idx];\n            if (options[key] === undefined) {\n                options[key] = Utils.clone(defaultOptions[key]);\n            }\n        }\n\n        normalized = options;\n    } else {\n        normalized = Utils.clone(defaultOptions);\n    }\n\n    if (normalized.strictMode === true) {\n        normalized.forceAdditional  = true;\n        normalized.forceItems       = true;\n        normalized.forceMaxLength   = true;\n        normalized.forceProperties  = true;\n        normalized.noExtraKeywords  = true;\n        normalized.noTypeless       = true;\n        normalized.noEmptyStrings   = true;\n        normalized.noEmptyArrays    = true;\n    }\n\n    return normalized;\n}\n\n/*\n    constructor\n*/\nfunction ZSchema(options) {\n    this.cache = {};\n    this.referenceCache = [];\n\n    this.options = normalizeOptions(options);\n\n    // Disable strict validation for the built-in schemas\n    var metaschemaOptions = normalizeOptions({ });\n\n    this.setRemoteReference(\"http://json-schema.org/draft-04/schema\", Draft4Schema, metaschemaOptions);\n    this.setRemoteReference(\"http://json-schema.org/draft-04/hyper-schema\", Draft4HyperSchema, metaschemaOptions);\n}\n\n/*\n    instance methods\n*/\nZSchema.prototype.compileSchema = function (schema) {\n    var report = new Report(this.options);\n\n    schema = SchemaCache.getSchema.call(this, report, schema);\n\n    SchemaCompilation.compileSchema.call(this, report, schema);\n\n    this.lastReport = report;\n    return report.isValid();\n};\nZSchema.prototype.validateSchema = function (schema) {\n    if (Array.isArray(schema) && schema.length === 0) {\n        throw new Error(\".validateSchema was called with an empty array\");\n    }\n\n    var report = new Report(this.options);\n\n    schema = SchemaCache.getSchema.call(this, report, schema);\n\n    var compiled = SchemaCompilation.compileSchema.call(this, report, schema);\n    if (compiled) { SchemaValidation.validateSchema.call(this, report, schema); }\n\n    this.lastReport = report;\n    return report.isValid();\n};\nZSchema.prototype.validate = function (json, schema, options, callback) {\n\n    if (Utils.whatIs(options) === \"function\") {\n        callback = options;\n        options = {};\n    }\n    if (!options) { options = {}; }\n\n    var whatIs = Utils.whatIs(schema);\n    if (whatIs !== \"string\" && whatIs !== \"object\") {\n        var e = new Error(\"Invalid .validate call - schema must be an string or object but \" + whatIs + \" was passed!\");\n        if (callback) {\n            process.nextTick(function () {\n                callback(e, false);\n            });\n            return;\n        }\n        throw e;\n    }\n\n    var foundError = false;\n    var report = new Report(this.options);\n\n    if (typeof schema === \"string\") {\n        var schemaName = schema;\n        schema = SchemaCache.getSchema.call(this, report, schemaName);\n        if (!schema) {\n            throw new Error(\"Schema with id '\" + schemaName + \"' wasn't found in the validator cache!\");\n        }\n    } else {\n        schema = SchemaCache.getSchema.call(this, report, schema);\n    }\n\n    var compiled = false;\n    if (!foundError) {\n        compiled = SchemaCompilation.compileSchema.call(this, report, schema);\n    }\n    if (!compiled) {\n        this.lastReport = report;\n        foundError = true;\n    }\n\n    var validated = false;\n    if (!foundError) {\n        validated = SchemaValidation.validateSchema.call(this, report, schema);\n    }\n    if (!validated) {\n        this.lastReport = report;\n        foundError = true;\n    }\n\n    if (options.schemaPath) {\n        report.rootSchema = schema;\n        schema = get(schema, options.schemaPath);\n        if (!schema) {\n            throw new Error(\"Schema path '\" + options.schemaPath + \"' wasn't found in the schema!\");\n        }\n    }\n\n    if (!foundError) {\n        JsonValidation.validate.call(this, report, schema, json);\n    }\n\n    if (callback) {\n        report.processAsyncTasks(this.options.asyncTimeout, callback);\n        return;\n    } else if (report.asyncTasks.length > 0) {\n        throw new Error(\"This validation has async tasks and cannot be done in sync mode, please provide callback argument.\");\n    }\n\n    // assign lastReport so errors are retrievable in sync mode\n    this.lastReport = report;\n    return report.isValid();\n};\nZSchema.prototype.getLastError = function () {\n    if (this.lastReport.errors.length === 0) {\n        return null;\n    }\n    var e = new Error();\n    e.name = \"z-schema validation error\";\n    e.message = this.lastReport.commonErrorMessage;\n    e.details = this.lastReport.errors;\n    return e;\n};\nZSchema.prototype.getLastErrors = function () {\n    return this.lastReport && this.lastReport.errors.length > 0 ? this.lastReport.errors : undefined;\n};\nZSchema.prototype.getMissingReferences = function (arr) {\n    arr = arr || this.lastReport.errors;\n    var res = [],\n        idx = arr.length;\n    while (idx--) {\n        var error = arr[idx];\n        if (error.code === \"UNRESOLVABLE_REFERENCE\") {\n            var reference = error.params[0];\n            if (res.indexOf(reference) === -1) {\n                res.push(reference);\n            }\n        }\n        if (error.inner) {\n            res = res.concat(this.getMissingReferences(error.inner));\n        }\n    }\n    return res;\n};\nZSchema.prototype.getMissingRemoteReferences = function () {\n    var missingReferences = this.getMissingReferences(),\n        missingRemoteReferences = [],\n        idx = missingReferences.length;\n    while (idx--) {\n        var remoteReference = SchemaCache.getRemotePath(missingReferences[idx]);\n        if (remoteReference && missingRemoteReferences.indexOf(remoteReference) === -1) {\n            missingRemoteReferences.push(remoteReference);\n        }\n    }\n    return missingRemoteReferences;\n};\nZSchema.prototype.setRemoteReference = function (uri, schema, validationOptions) {\n    if (typeof schema === \"string\") {\n        schema = JSON.parse(schema);\n    } else {\n        schema = Utils.cloneDeep(schema);\n    }\n\n    if (validationOptions) {\n        schema.__$validationOptions = normalizeOptions(validationOptions);\n    }\n\n    SchemaCache.cacheSchemaByUri.call(this, uri, schema);\n};\nZSchema.prototype.getResolvedSchema = function (schema) {\n    var report = new Report(this.options);\n    schema = SchemaCache.getSchema.call(this, report, schema);\n\n    // clone before making any modifications\n    schema = Utils.cloneDeep(schema);\n\n    var visited = [];\n\n    // clean-up the schema and resolve references\n    var cleanup = function (schema) {\n        var key,\n            typeOf = Utils.whatIs(schema);\n        if (typeOf !== \"object\" && typeOf !== \"array\") {\n            return;\n        }\n\n        if (schema.___$visited) {\n            return;\n        }\n\n        schema.___$visited = true;\n        visited.push(schema);\n\n        if (schema.$ref && schema.__$refResolved) {\n            var from = schema.__$refResolved;\n            var to = schema;\n            delete schema.$ref;\n            delete schema.__$refResolved;\n            for (key in from) {\n                if (from.hasOwnProperty(key)) {\n                    to[key] = from[key];\n                }\n            }\n        }\n        for (key in schema) {\n            if (schema.hasOwnProperty(key)) {\n                if (key.indexOf(\"__$\") === 0) {\n                    delete schema[key];\n                } else {\n                    cleanup(schema[key]);\n                }\n            }\n        }\n    };\n\n    cleanup(schema);\n    visited.forEach(function (s) {\n        delete s.___$visited;\n    });\n\n    this.lastReport = report;\n    if (report.isValid()) {\n        return schema;\n    } else {\n        throw this.getLastError();\n    }\n};\nZSchema.prototype.setSchemaReader = function (schemaReader) {\n    return ZSchema.setSchemaReader(schemaReader);\n};\nZSchema.prototype.getSchemaReader = function () {\n    return ZSchema.schemaReader;\n};\n\n/*\n    static methods\n*/\nZSchema.setSchemaReader = function (schemaReader) {\n    ZSchema.schemaReader = schemaReader;\n};\nZSchema.registerFormat = function (formatName, validatorFunction) {\n    FormatValidators[formatName] = validatorFunction;\n};\nZSchema.unregisterFormat = function (formatName) {\n    delete FormatValidators[formatName];\n};\nZSchema.getRegisteredFormats = function () {\n    return Object.keys(FormatValidators);\n};\nZSchema.getDefaultOptions = function () {\n    return Utils.cloneDeep(defaultOptions);\n};\n\nmodule.exports = ZSchema;\n","module.exports={\n    \"$schema\": \"http://json-schema.org/draft-04/hyper-schema#\",\n    \"id\": \"http://json-schema.org/draft-04/hyper-schema#\",\n    \"title\": \"JSON Hyper-Schema\",\n    \"allOf\": [\n        {\n            \"$ref\": \"http://json-schema.org/draft-04/schema#\"\n        }\n    ],\n    \"properties\": {\n        \"additionalItems\": {\n            \"anyOf\": [\n                {\n                    \"type\": \"boolean\"\n                },\n                {\n                    \"$ref\": \"#\"\n                }\n            ]\n        },\n        \"additionalProperties\": {\n            \"anyOf\": [\n                {\n                    \"type\": \"boolean\"\n                },\n                {\n                    \"$ref\": \"#\"\n                }\n            ]\n        },\n        \"dependencies\": {\n            \"additionalProperties\": {\n                \"anyOf\": [\n                    {\n                        \"$ref\": \"#\"\n                    },\n                    {\n                        \"type\": \"array\"\n                    }\n                ]\n            }\n        },\n        \"items\": {\n            \"anyOf\": [\n                {\n                    \"$ref\": \"#\"\n                },\n                {\n                    \"$ref\": \"#/definitions/schemaArray\"\n                }\n            ]\n        },\n        \"definitions\": {\n            \"additionalProperties\": {\n                \"$ref\": \"#\"\n            }\n        },\n        \"patternProperties\": {\n            \"additionalProperties\": {\n                \"$ref\": \"#\"\n            }\n        },\n        \"properties\": {\n            \"additionalProperties\": {\n                \"$ref\": \"#\"\n            }\n        },\n        \"allOf\": {\n            \"$ref\": \"#/definitions/schemaArray\"\n        },\n        \"anyOf\": {\n            \"$ref\": \"#/definitions/schemaArray\"\n        },\n        \"oneOf\": {\n            \"$ref\": \"#/definitions/schemaArray\"\n        },\n        \"not\": {\n            \"$ref\": \"#\"\n        },\n\n        \"links\": {\n            \"type\": \"array\",\n            \"items\": {\n                \"$ref\": \"#/definitions/linkDescription\"\n            }\n        },\n        \"fragmentResolution\": {\n            \"type\": \"string\"\n        },\n        \"media\": {\n            \"type\": \"object\",\n            \"properties\": {\n                \"type\": {\n                    \"description\": \"A media type, as described in RFC 2046\",\n                    \"type\": \"string\"\n                },\n                \"binaryEncoding\": {\n                    \"description\": \"A content encoding scheme, as described in RFC 2045\",\n                    \"type\": \"string\"\n                }\n            }\n        },\n        \"pathStart\": {\n            \"description\": \"Instances' URIs must start with this value for this schema to apply to them\",\n            \"type\": \"string\",\n            \"format\": \"uri\"\n        }\n    },\n    \"definitions\": {\n        \"schemaArray\": {\n            \"type\": \"array\",\n            \"items\": {\n                \"$ref\": \"#\"\n            }\n        },\n        \"linkDescription\": {\n            \"title\": \"Link Description Object\",\n            \"type\": \"object\",\n            \"required\": [ \"href\", \"rel\" ],\n            \"properties\": {\n                \"href\": {\n                    \"description\": \"a URI template, as defined by RFC 6570, with the addition of the $, ( and ) characters for pre-processing\",\n                    \"type\": \"string\"\n                },\n                \"rel\": {\n                    \"description\": \"relation to the target resource of the link\",\n                    \"type\": \"string\"\n                },\n                \"title\": {\n                    \"description\": \"a title for the link\",\n                    \"type\": \"string\"\n                },\n                \"targetSchema\": {\n                    \"description\": \"JSON Schema describing the link target\",\n                    \"$ref\": \"#\"\n                },\n                \"mediaType\": {\n                    \"description\": \"media type (as defined by RFC 2046) describing the link target\",\n                    \"type\": \"string\"\n                },\n                \"method\": {\n                    \"description\": \"method for requesting the target of the link (e.g. for HTTP this might be \\\"GET\\\" or \\\"DELETE\\\")\",\n                    \"type\": \"string\"\n                },\n                \"encType\": {\n                    \"description\": \"The media type in which to submit data along with the request\",\n                    \"type\": \"string\",\n                    \"default\": \"application/json\"\n                },\n                \"schema\": {\n                    \"description\": \"Schema describing the data to submit along with the request\",\n                    \"$ref\": \"#\"\n                }\n            }\n        }\n    }\n}\n\n","module.exports={\n    \"id\": \"http://json-schema.org/draft-04/schema#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"description\": \"Core schema meta-schema\",\n    \"definitions\": {\n        \"schemaArray\": {\n            \"type\": \"array\",\n            \"minItems\": 1,\n            \"items\": { \"$ref\": \"#\" }\n        },\n        \"positiveInteger\": {\n            \"type\": \"integer\",\n            \"minimum\": 0\n        },\n        \"positiveIntegerDefault0\": {\n            \"allOf\": [ { \"$ref\": \"#/definitions/positiveInteger\" }, { \"default\": 0 } ]\n        },\n        \"simpleTypes\": {\n            \"enum\": [ \"array\", \"boolean\", \"integer\", \"null\", \"number\", \"object\", \"string\" ]\n        },\n        \"stringArray\": {\n            \"type\": \"array\",\n            \"items\": { \"type\": \"string\" },\n            \"minItems\": 1,\n            \"uniqueItems\": true\n        }\n    },\n    \"type\": \"object\",\n    \"properties\": {\n        \"id\": {\n            \"type\": \"string\",\n            \"format\": \"uri\"\n        },\n        \"$schema\": {\n            \"type\": \"string\",\n            \"format\": \"uri\"\n        },\n        \"title\": {\n            \"type\": \"string\"\n        },\n        \"description\": {\n            \"type\": \"string\"\n        },\n        \"default\": {},\n        \"multipleOf\": {\n            \"type\": \"number\",\n            \"minimum\": 0,\n            \"exclusiveMinimum\": true\n        },\n        \"maximum\": {\n            \"type\": \"number\"\n        },\n        \"exclusiveMaximum\": {\n            \"type\": \"boolean\",\n            \"default\": false\n        },\n        \"minimum\": {\n            \"type\": \"number\"\n        },\n        \"exclusiveMinimum\": {\n            \"type\": \"boolean\",\n            \"default\": false\n        },\n        \"maxLength\": { \"$ref\": \"#/definitions/positiveInteger\" },\n        \"minLength\": { \"$ref\": \"#/definitions/positiveIntegerDefault0\" },\n        \"pattern\": {\n            \"type\": \"string\",\n            \"format\": \"regex\"\n        },\n        \"additionalItems\": {\n            \"anyOf\": [\n                { \"type\": \"boolean\" },\n                { \"$ref\": \"#\" }\n            ],\n            \"default\": {}\n        },\n        \"items\": {\n            \"anyOf\": [\n                { \"$ref\": \"#\" },\n                { \"$ref\": \"#/definitions/schemaArray\" }\n            ],\n            \"default\": {}\n        },\n        \"maxItems\": { \"$ref\": \"#/definitions/positiveInteger\" },\n        \"minItems\": { \"$ref\": \"#/definitions/positiveIntegerDefault0\" },\n        \"uniqueItems\": {\n            \"type\": \"boolean\",\n            \"default\": false\n        },\n        \"maxProperties\": { \"$ref\": \"#/definitions/positiveInteger\" },\n        \"minProperties\": { \"$ref\": \"#/definitions/positiveIntegerDefault0\" },\n        \"required\": { \"$ref\": \"#/definitions/stringArray\" },\n        \"additionalProperties\": {\n            \"anyOf\": [\n                { \"type\": \"boolean\" },\n                { \"$ref\": \"#\" }\n            ],\n            \"default\": {}\n        },\n        \"definitions\": {\n            \"type\": \"object\",\n            \"additionalProperties\": { \"$ref\": \"#\" },\n            \"default\": {}\n        },\n        \"properties\": {\n            \"type\": \"object\",\n            \"additionalProperties\": { \"$ref\": \"#\" },\n            \"default\": {}\n        },\n        \"patternProperties\": {\n            \"type\": \"object\",\n            \"additionalProperties\": { \"$ref\": \"#\" },\n            \"default\": {}\n        },\n        \"dependencies\": {\n            \"type\": \"object\",\n            \"additionalProperties\": {\n                \"anyOf\": [\n                    { \"$ref\": \"#\" },\n                    { \"$ref\": \"#/definitions/stringArray\" }\n                ]\n            }\n        },\n        \"enum\": {\n            \"type\": \"array\",\n            \"minItems\": 1,\n            \"uniqueItems\": true\n        },\n        \"type\": {\n            \"anyOf\": [\n                { \"$ref\": \"#/definitions/simpleTypes\" },\n                {\n                    \"type\": \"array\",\n                    \"items\": { \"$ref\": \"#/definitions/simpleTypes\" },\n                    \"minItems\": 1,\n                    \"uniqueItems\": true\n                }\n            ]\n        },\n        \"format\": { \"type\": \"string\" },\n        \"allOf\": { \"$ref\": \"#/definitions/schemaArray\" },\n        \"anyOf\": { \"$ref\": \"#/definitions/schemaArray\" },\n        \"oneOf\": { \"$ref\": \"#/definitions/schemaArray\" },\n        \"not\": { \"$ref\": \"#\" }\n    },\n    \"dependencies\": {\n        \"exclusiveMaximum\": [ \"maximum\" ],\n        \"exclusiveMinimum\": [ \"minimum\" ]\n    },\n    \"default\": {}\n}\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/apiDeclaration.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"required\": [ \"swaggerVersion\", \"basePath\", \"apis\" ],\n    \"properties\": {\n        \"swaggerVersion\": { \"enum\": [ \"1.2\" ] },\n        \"apiVersion\": { \"type\": \"string\" },\n        \"basePath\": {\n            \"type\": \"string\",\n            \"format\": \"uri\",\n            \"pattern\": \"^https?://\"\n        },\n        \"resourcePath\": {\n            \"type\": \"string\",\n            \"format\": \"uri\",\n            \"pattern\": \"^/\"\n        },\n        \"apis\": {\n            \"type\": \"array\",\n            \"items\": { \"$ref\": \"#/definitions/apiObject\" }\n        },\n        \"models\": {\n            \"type\": \"object\",\n            \"additionalProperties\": {\n                \"$ref\": \"modelsObject.json#\"\n            }\n        },\n        \"produces\": { \"$ref\": \"#/definitions/mimeTypeArray\" },\n        \"consumes\": { \"$ref\": \"#/definitions/mimeTypeArray\" },\n        \"authorizations\": { \"$ref\": \"authorizationObject.json#\" }\n    },\n    \"additionalProperties\": false,\n    \"definitions\": {\n        \"apiObject\": {\n            \"type\": \"object\",\n            \"required\": [ \"path\", \"operations\" ],\n            \"properties\": {\n                \"path\": {\n                    \"type\": \"string\",\n                    \"format\": \"uri-template\",\n                    \"pattern\": \"^/\"\n                },\n                \"description\": { \"type\": \"string\" },\n                \"operations\": {\n                    \"type\": \"array\",\n                    \"items\": { \"$ref\": \"operationObject.json#\" }\n                }\n            },\n            \"additionalProperties\": false\n        },\n        \"mimeTypeArray\": {\n            \"type\": \"array\",\n            \"items\": {\n                \"type\": \"string\",\n                \"format\": \"mime-type\"\n            },\n            \"uniqueItems\": true\n        }\n    }\n}\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/authorizationObject.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"additionalProperties\": {\n        \"oneOf\": [\n            {\n                \"$ref\": \"#/definitions/basicAuth\"\n            },\n            {\n                \"$ref\": \"#/definitions/apiKey\"\n            },\n            {\n                \"$ref\": \"#/definitions/oauth2\"\n            }\n        ]\n    },\n    \"definitions\": {\n        \"basicAuth\": {\n            \"required\": [ \"type\" ],\n            \"properties\": {\n                \"type\": { \"enum\": [ \"basicAuth\" ] }\n            },\n            \"additionalProperties\": false\n        },\n        \"apiKey\": {\n            \"required\": [ \"type\", \"passAs\", \"keyname\" ],\n            \"properties\": {\n                \"type\": { \"enum\": [ \"apiKey\" ] },\n                \"passAs\": { \"enum\": [ \"header\", \"query\" ] },\n                \"keyname\": { \"type\": \"string\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"oauth2\": {\n            \"type\": \"object\",\n            \"required\": [ \"type\", \"grantTypes\" ],\n            \"properties\": {\n                \"type\": { \"enum\": [ \"oauth2\" ] },\n                \"scopes\": {\n                    \"type\": \"array\",\n                    \"items\": { \"$ref\": \"#/definitions/oauth2Scope\" }\n                },\n                \"grantTypes\": { \"$ref\": \"oauth2GrantType.json#\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"oauth2Scope\": {\n            \"type\": \"object\",\n            \"required\": [ \"scope\" ],\n            \"properties\": {\n                \"scope\": { \"type\": \"string\" },\n                \"description\": { \"type\": \"string\" }\n            },\n            \"additionalProperties\": false\n        }\n    }\n}\n\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/dataType.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"description\": \"Data type as described by the specification (version 1.2)\",\n    \"type\": \"object\",\n    \"oneOf\": [\n        { \"$ref\": \"#/definitions/refType\" },\n        { \"$ref\": \"#/definitions/voidType\" },\n        { \"$ref\": \"#/definitions/primitiveType\" },\n        { \"$ref\": \"#/definitions/modelType\" },\n        { \"$ref\": \"#/definitions/arrayType\" }\n    ],\n    \"definitions\": {\n        \"refType\": {\n            \"required\": [ \"$ref\" ],\n            \"properties\": {\n                \"$ref\": { \"type\": \"string\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"voidType\": {\n            \"enum\": [ { \"type\": \"void\" } ]\n        },\n        \"modelType\": {\n            \"required\": [ \"type\" ],\n            \"properties\": {\n                \"type\": {\n                    \"type\": \"string\",\n                    \"not\": {\n                        \"enum\": [ \"boolean\", \"integer\", \"number\", \"string\", \"array\" ]\n                    }\n                }\n            },\n            \"additionalProperties\": false\n        },\n        \"primitiveType\": {\n            \"required\": [ \"type\" ],\n            \"properties\": {\n                \"type\": {\n                    \"enum\": [ \"boolean\", \"integer\", \"number\", \"string\" ]\n                },\n                \"format\": { \"type\": \"string\" },\n                \"defaultValue\": {\n                    \"not\": { \"type\": [ \"array\", \"object\", \"null\" ] }\n                },\n                \"enum\": {\n                    \"type\": \"array\",\n                    \"items\": { \"type\": \"string\" },\n                    \"minItems\": 1,\n                    \"uniqueItems\": true\n                },\n                \"minimum\": { \"type\": \"string\" },\n                \"maximum\": { \"type\": \"string\" }\n            },\n            \"additionalProperties\": false,\n            \"dependencies\": {\n                \"format\": {\n                    \"oneOf\": [\n                        {\n                            \"properties\": {\n                                \"type\": { \"enum\": [ \"integer\" ] },\n                                \"format\": { \"enum\": [ \"int32\", \"int64\" ] }\n                            }\n                        },\n                        {\n                            \"properties\": {\n                                \"type\": { \"enum\": [ \"number\" ] },\n                                \"format\": { \"enum\": [ \"float\", \"double\" ] }\n                            }\n                        },\n                        {\n                            \"properties\": {\n                                \"type\": { \"enum\": [ \"string\" ] },\n                                \"format\": {\n                                    \"enum\": [ \"byte\", \"date\", \"date-time\" ]\n                                }\n                            }\n                        }\n                    ]\n                },\n                \"enum\": {\n                    \"properties\": {\n                        \"type\": { \"enum\": [ \"string\" ] }\n                    }\n                },\n                \"minimum\": {\n                    \"properties\": {\n                        \"type\": { \"enum\": [ \"integer\", \"number\" ] }\n                    }\n                },\n                \"maximum\": {\n                    \"properties\": {\n                        \"type\": { \"enum\": [ \"integer\", \"number\" ] }\n                    }\n                }\n            }\n        },\n        \"arrayType\": {\n            \"required\": [ \"type\", \"items\" ],\n            \"properties\": {\n                \"type\": { \"enum\": [ \"array\" ] },\n                \"items\": {\n                    \"type\": \"array\",\n                    \"items\": { \"$ref\": \"#/definitions/itemsObject\" }\n                },\n                \"uniqueItems\": { \"type\": \"boolean\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"itemsObject\": {\n            \"oneOf\": [\n                {\n                    \"$ref\": \"#/definitions/refType\"\n                },\n                {\n                    \"allOf\": [\n                        {\n                            \"$ref\": \"#/definitions/primitiveType\"\n                        },\n                        {\n                            \"properties\": {\n                                \"type\": {},\n                                \"format\": {}\n                            },\n                            \"additionalProperties\": false\n                        }\n                    ]\n                }\n            ]\n        }\n    }\n}","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/dataTypeBase.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"description\": \"Data type fields (section 4.3.3)\",\n    \"type\": \"object\",\n    \"oneOf\": [\n        { \"required\": [ \"type\" ] },\n        { \"required\": [ \"$ref\" ] }\n    ],\n    \"properties\": {\n        \"type\": { \"type\": \"string\" },\n        \"$ref\": { \"type\": \"string\" },\n        \"format\": { \"type\": \"string\" },\n        \"defaultValue\": {\n            \"not\": { \"type\": [ \"array\", \"object\", \"null\" ] }\n        },\n        \"enum\": {\n            \"type\": \"array\",\n            \"items\": { \"type\": \"string\" },\n            \"uniqueItems\": true,\n            \"minItems\": 1\n        },\n        \"minimum\": { \"type\": \"string\" },\n        \"maximum\": { \"type\": \"string\" },\n        \"items\": { \"$ref\": \"#/definitions/itemsObject\" },\n        \"uniqueItems\": { \"type\": \"boolean\" }\n    },\n    \"dependencies\": {\n        \"format\": {\n            \"oneOf\": [\n                {\n                    \"properties\": {\n                        \"type\": { \"enum\": [ \"integer\" ] },\n                        \"format\": { \"enum\": [ \"int32\", \"int64\" ] }\n                    }\n                },\n                {\n                    \"properties\": {\n                        \"type\": { \"enum\": [ \"number\" ] },\n                        \"format\": { \"enum\": [ \"float\", \"double\" ] }\n                    }\n                },\n                {\n                    \"properties\": {\n                        \"type\": { \"enum\": [ \"string\" ] },\n                        \"format\": {\n                            \"enum\": [ \"byte\", \"date\", \"date-time\" ]\n                        }\n                    }\n                }\n            ]\n        }\n    },\n    \"definitions\": {\n        \"itemsObject\": {\n            \"oneOf\": [\n                {\n                    \"type\": \"object\",\n                    \"required\": [ \"$ref\" ],\n                    \"properties\": {\n                        \"$ref\": { \"type\": \"string\" }\n                    },\n                    \"additionalProperties\": false\n                },\n                {\n                    \"allOf\": [\n                        { \"$ref\": \"#\" },\n                        {\n                            \"required\": [ \"type\" ],\n                            \"properties\": {\n                                \"type\": {},\n                                \"format\": {}\n                            },\n                            \"additionalProperties\": false\n                        }\n                    ]\n                }\n            ]\n        }\n    }\n}\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/infoObject.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"description\": \"info object (section 5.1.3)\",\n    \"type\": \"object\",\n    \"required\": [ \"title\", \"description\" ],\n    \"properties\": {\n        \"title\": { \"type\": \"string\" },\n        \"description\": { \"type\": \"string\" },\n        \"termsOfServiceUrl\": { \"type\": \"string\", \"format\": \"uri\" },\n        \"contact\": { \"type\": \"string\", \"format\": \"email\" },\n        \"license\": { \"type\": \"string\" },\n        \"licenseUrl\": { \"type\": \"string\", \"format\": \"uri\" }\n    },\n    \"additionalProperties\": false\n}","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/modelsObject.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"required\": [ \"id\", \"properties\" ],\n    \"properties\": {\n        \"id\": { \"type\": \"string\" },\n        \"description\": { \"type\": \"string\" },\n        \"properties\": {\n            \"type\": \"object\",\n            \"additionalProperties\": { \"$ref\": \"#/definitions/propertyObject\" }\n        },\n        \"subTypes\": {\n            \"type\": \"array\",\n            \"items\": { \"type\": \"string\" },\n            \"uniqueItems\": true\n        },\n        \"discriminator\": { \"type\": \"string\" }\n    },\n    \"dependencies\": {\n        \"subTypes\": [ \"discriminator\" ]\n    },\n    \"definitions\": {\n        \"propertyObject\": {\n            \"allOf\": [\n                {\n                    \"not\": { \"$ref\": \"#\" }\n                },\n                {\n                    \"$ref\": \"dataTypeBase.json#\"\n                }\n            ]\n        }\n    }\n}\n\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/oauth2GrantType.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"minProperties\": 1,\n    \"properties\": {\n        \"implicit\": { \"$ref\": \"#/definitions/implicit\" },\n        \"authorization_code\": { \"$ref\": \"#/definitions/authorizationCode\" }\n    },\n    \"definitions\": {\n        \"implicit\": {\n            \"type\": \"object\",\n            \"required\": [ \"loginEndpoint\" ],\n            \"properties\": {\n                \"loginEndpoint\": { \"$ref\": \"#/definitions/loginEndpoint\" },\n                \"tokenName\": { \"type\": \"string\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"authorizationCode\": {\n            \"type\": \"object\",\n            \"required\": [ \"tokenEndpoint\", \"tokenRequestEndpoint\" ],\n            \"properties\": {\n                \"tokenEndpoint\": { \"$ref\": \"#/definitions/tokenEndpoint\" },\n                \"tokenRequestEndpoint\": { \"$ref\": \"#/definitions/tokenRequestEndpoint\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"loginEndpoint\": {\n            \"type\": \"object\",\n            \"required\": [ \"url\" ],\n            \"properties\": {\n                \"url\": { \"type\": \"string\", \"format\": \"uri\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"tokenEndpoint\": {\n            \"type\": \"object\",\n            \"required\": [ \"url\" ],\n            \"properties\": {\n                \"url\": { \"type\": \"string\", \"format\": \"uri\" },\n                \"tokenName\": { \"type\": \"string\" }\n            },\n            \"additionalProperties\": false\n        },\n        \"tokenRequestEndpoint\": {\n            \"type\": \"object\",\n            \"required\": [ \"url\" ],\n            \"properties\": {\n                \"url\": { \"type\": \"string\", \"format\": \"uri\" },\n                \"clientIdName\": { \"type\": \"string\" },\n                \"clientSecretName\": { \"type\": \"string\" }\n            },\n            \"additionalProperties\": false\n        }\n    }\n}","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/operationObject.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"allOf\": [\n        { \"$ref\": \"dataTypeBase.json#\" },\n        {\n            \"required\": [ \"method\", \"nickname\", \"parameters\" ],\n            \"properties\": {\n                \"method\": { \"enum\": [ \"GET\", \"HEAD\", \"POST\", \"PUT\", \"PATCH\", \"DELETE\", \"OPTIONS\" ] },\n                \"summary\": { \"type\": \"string\", \"maxLength\": 120 },\n                \"notes\": { \"type\": \"string\" },\n                \"nickname\": {\n                    \"type\": \"string\",\n                    \"pattern\": \"^[a-zA-Z0-9_]+$\"\n                },\n                \"authorizations\": {\n                    \"type\": \"object\",\n                    \"additionalProperties\": {\n                        \"type\": \"array\",\n                        \"items\": {\n                            \"$ref\": \"authorizationObject.json#/definitions/oauth2Scope\"\n                        }\n                    }\n                },\n                \"parameters\": {\n                    \"type\": \"array\",\n                    \"items\": { \"$ref\": \"parameterObject.json#\" }\n                },\n                \"responseMessages\": {\n                    \"type\": \"array\",\n                    \"items\": { \"$ref\": \"#/definitions/responseMessageObject\"}\n                },\n                \"produces\": { \"$ref\": \"#/definitions/mimeTypeArray\" },\n                \"consumes\": { \"$ref\": \"#/definitions/mimeTypeArray\" },\n                \"deprecated\": { \"enum\": [ \"true\", \"false\" ] }\n            }\n        }\n    ],\n    \"definitions\": {\n        \"responseMessageObject\": {\n            \"type\": \"object\",\n            \"required\": [ \"code\", \"message\" ],\n            \"properties\": {\n                \"code\": { \"$ref\": \"#/definitions/rfc2616section10\" },\n                \"message\": { \"type\": \"string\" },\n                \"responseModel\": { \"type\": \"string\" }\n            }\n        },\n        \"rfc2616section10\": {\n            \"type\": \"integer\",\n            \"minimum\": 100,\n            \"maximum\": 600,\n            \"exclusiveMaximum\": true\n        },\n        \"mimeTypeArray\": {\n            \"type\": \"array\",\n            \"items\": {\n                \"type\": \"string\",\n                \"format\": \"mime-type\"\n            },\n            \"uniqueItems\": true\n        }\n    }\n}\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/parameterObject.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"allOf\": [\n        { \"$ref\": \"dataTypeBase.json#\" },\n        {\n            \"required\": [ \"paramType\", \"name\" ],\n            \"properties\": {\n                \"paramType\": {\n                    \"enum\": [ \"path\", \"query\", \"body\", \"header\", \"form\" ]\n                },\n                \"name\": { \"type\": \"string\" },\n                \"description\": { \"type\": \"string\" },\n                \"required\": { \"type\": \"boolean\" },\n                \"allowMultiple\": { \"type\": \"boolean\" }\n            }\n        },\n        {\n            \"description\": \"type File requires special paramType and consumes\",\n            \"oneOf\": [\n                {\n                    \"properties\": {\n                        \"type\": { \"not\": { \"enum\": [ \"File\" ] } }\n                    }\n                },\n                {\n                    \"properties\": {\n                        \"type\": { \"enum\": [ \"File\" ] },\n                        \"paramType\": { \"enum\": [ \"form\" ] },\n                        \"consumes\": { \"enum\": [ \"multipart/form-data\" ] }\n                    }\n                }\n            ]\n        }\n    ]\n}\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/resourceListing.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"required\": [ \"swaggerVersion\", \"apis\" ],\n    \"properties\": {\n        \"swaggerVersion\": { \"enum\": [ \"1.2\" ] },\n        \"apis\": {\n            \"type\": \"array\",\n            \"items\": { \"$ref\": \"resourceObject.json#\" }\n        },\n        \"apiVersion\": { \"type\": \"string\" },\n        \"info\": { \"$ref\": \"infoObject.json#\" },\n        \"authorizations\": { \"$ref\": \"authorizationObject.json#\" }\n    }\n}\n","module.exports={\n    \"id\": \"http://wordnik.github.io/schemas/v1.2/resourceObject.json#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"type\": \"object\",\n    \"required\": [ \"path\" ],\n    \"properties\": {\n        \"path\": { \"type\": \"string\", \"format\": \"uri\" },\n        \"description\": { \"type\": \"string\" }\n    },\n    \"additionalProperties\": false\n}","module.exports={\n  \"title\": \"A JSON Schema for Swagger 2.0 API.\",\n  \"id\": \"http://swagger.io/v2/schema.json#\",\n  \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n  \"type\": \"object\",\n  \"required\": [\n    \"swagger\",\n    \"info\",\n    \"paths\"\n  ],\n  \"additionalProperties\": false,\n  \"patternProperties\": {\n    \"^x-\": {\n      \"$ref\": \"#/definitions/vendorExtension\"\n    }\n  },\n  \"properties\": {\n    \"swagger\": {\n      \"type\": \"string\",\n      \"enum\": [\n        \"2.0\"\n      ],\n      \"description\": \"The Swagger version of this document.\"\n    },\n    \"info\": {\n      \"$ref\": \"#/definitions/info\"\n    },\n    \"host\": {\n      \"type\": \"string\",\n      \"pattern\": \"^[^{}/ :\\\\\\\\]+(?::\\\\d+)?$\",\n      \"description\": \"The host (name or ip) of the API. Example: 'swagger.io'\"\n    },\n    \"basePath\": {\n      \"type\": \"string\",\n      \"pattern\": \"^/\",\n      \"description\": \"The base path to the API. Example: '/api'.\"\n    },\n    \"schemes\": {\n      \"$ref\": \"#/definitions/schemesList\"\n    },\n    \"consumes\": {\n      \"description\": \"A list of MIME types accepted by the API.\",\n      \"$ref\": \"#/definitions/mediaTypeList\"\n    },\n    \"produces\": {\n      \"description\": \"A list of MIME types the API can produce.\",\n      \"$ref\": \"#/definitions/mediaTypeList\"\n    },\n    \"paths\": {\n      \"$ref\": \"#/definitions/paths\"\n    },\n    \"definitions\": {\n      \"$ref\": \"#/definitions/definitions\"\n    },\n    \"parameters\": {\n      \"$ref\": \"#/definitions/parameterDefinitions\"\n    },\n    \"responses\": {\n      \"$ref\": \"#/definitions/responseDefinitions\"\n    },\n    \"security\": {\n      \"$ref\": \"#/definitions/security\"\n    },\n    \"securityDefinitions\": {\n      \"$ref\": \"#/definitions/securityDefinitions\"\n    },\n    \"tags\": {\n      \"type\": \"array\",\n      \"items\": {\n        \"$ref\": \"#/definitions/tag\"\n      },\n      \"uniqueItems\": true\n    },\n    \"externalDocs\": {\n      \"$ref\": \"#/definitions/externalDocs\"\n    }\n  },\n  \"definitions\": {\n    \"info\": {\n      \"type\": \"object\",\n      \"description\": \"General information about the API.\",\n      \"required\": [\n        \"version\",\n        \"title\"\n      ],\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"title\": {\n          \"type\": \"string\",\n          \"description\": \"A unique and precise title of the API.\"\n        },\n        \"version\": {\n          \"type\": \"string\",\n          \"description\": \"A semantic version number of the API.\"\n        },\n        \"description\": {\n          \"type\": \"string\",\n          \"description\": \"A longer description of the API. Should be different from the title.  GitHub Flavored Markdown is allowed.\"\n        },\n        \"termsOfService\": {\n          \"type\": \"string\",\n          \"description\": \"The terms of service for the API.\"\n        },\n        \"contact\": {\n          \"$ref\": \"#/definitions/contact\"\n        },\n        \"license\": {\n          \"$ref\": \"#/definitions/license\"\n        }\n      }\n    },\n    \"contact\": {\n      \"type\": \"object\",\n      \"description\": \"Contact information for the owners of the API.\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"name\": {\n          \"type\": \"string\",\n          \"description\": \"The identifying name of the contact person/organization.\"\n        },\n        \"url\": {\n          \"type\": \"string\",\n          \"description\": \"The URL pointing to the contact information.\",\n          \"format\": \"uri\"\n        },\n        \"email\": {\n          \"type\": \"string\",\n          \"description\": \"The email address of the contact person/organization.\",\n          \"format\": \"email\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"license\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"name\"\n      ],\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"name\": {\n          \"type\": \"string\",\n          \"description\": \"The name of the license type. It's encouraged to use an OSI compatible license.\"\n        },\n        \"url\": {\n          \"type\": \"string\",\n          \"description\": \"The URL pointing to the license.\",\n          \"format\": \"uri\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"paths\": {\n      \"type\": \"object\",\n      \"description\": \"Relative paths to the individual endpoints. They must be relative to the 'basePath'.\",\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        },\n        \"^/\": {\n          \"$ref\": \"#/definitions/pathItem\"\n        }\n      },\n      \"additionalProperties\": false\n    },\n    \"definitions\": {\n      \"type\": \"object\",\n      \"additionalProperties\": {\n        \"$ref\": \"#/definitions/schema\"\n      },\n      \"description\": \"One or more JSON objects describing the schemas being consumed and produced by the API.\"\n    },\n    \"parameterDefinitions\": {\n      \"type\": \"object\",\n      \"additionalProperties\": {\n        \"$ref\": \"#/definitions/parameter\"\n      },\n      \"description\": \"One or more JSON representations for parameters\"\n    },\n    \"responseDefinitions\": {\n      \"type\": \"object\",\n      \"additionalProperties\": {\n        \"$ref\": \"#/definitions/response\"\n      },\n      \"description\": \"One or more JSON representations for parameters\"\n    },\n    \"externalDocs\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"description\": \"information about external documentation\",\n      \"required\": [\n        \"url\"\n      ],\n      \"properties\": {\n        \"description\": {\n          \"type\": \"string\"\n        },\n        \"url\": {\n          \"type\": \"string\",\n          \"format\": \"uri\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"examples\": {\n      \"type\": \"object\",\n      \"additionalProperties\": true\n    },\n    \"mimeType\": {\n      \"type\": \"string\",\n      \"description\": \"The MIME type of the HTTP message.\"\n    },\n    \"operation\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"responses\"\n      ],\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"tags\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"string\"\n          },\n          \"uniqueItems\": true\n        },\n        \"summary\": {\n          \"type\": \"string\",\n          \"description\": \"A brief summary of the operation.\"\n        },\n        \"description\": {\n          \"type\": \"string\",\n          \"description\": \"A longer description of the operation, GitHub Flavored Markdown is allowed.\"\n        },\n        \"externalDocs\": {\n          \"$ref\": \"#/definitions/externalDocs\"\n        },\n        \"operationId\": {\n          \"type\": \"string\",\n          \"description\": \"A unique identifier of the operation.\"\n        },\n        \"produces\": {\n          \"description\": \"A list of MIME types the API can produce.\",\n          \"$ref\": \"#/definitions/mediaTypeList\"\n        },\n        \"consumes\": {\n          \"description\": \"A list of MIME types the API can consume.\",\n          \"$ref\": \"#/definitions/mediaTypeList\"\n        },\n        \"parameters\": {\n          \"$ref\": \"#/definitions/parametersList\"\n        },\n        \"responses\": {\n          \"$ref\": \"#/definitions/responses\"\n        },\n        \"schemes\": {\n          \"$ref\": \"#/definitions/schemesList\"\n        },\n        \"deprecated\": {\n          \"type\": \"boolean\",\n          \"default\": false\n        },\n        \"security\": {\n          \"$ref\": \"#/definitions/security\"\n        }\n      }\n    },\n    \"pathItem\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"$ref\": {\n          \"type\": \"string\"\n        },\n        \"get\": {\n          \"$ref\": \"#/definitions/operation\"\n        },\n        \"put\": {\n          \"$ref\": \"#/definitions/operation\"\n        },\n        \"post\": {\n          \"$ref\": \"#/definitions/operation\"\n        },\n        \"delete\": {\n          \"$ref\": \"#/definitions/operation\"\n        },\n        \"options\": {\n          \"$ref\": \"#/definitions/operation\"\n        },\n        \"head\": {\n          \"$ref\": \"#/definitions/operation\"\n        },\n        \"patch\": {\n          \"$ref\": \"#/definitions/operation\"\n        },\n        \"parameters\": {\n          \"$ref\": \"#/definitions/parametersList\"\n        }\n      }\n    },\n    \"responses\": {\n      \"type\": \"object\",\n      \"description\": \"Response objects names can either be any valid HTTP status code or 'default'.\",\n      \"minProperties\": 1,\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^([0-9]{3})$|^(default)$\": {\n          \"$ref\": \"#/definitions/responseValue\"\n        },\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"not\": {\n        \"type\": \"object\",\n        \"additionalProperties\": false,\n        \"patternProperties\": {\n          \"^x-\": {\n            \"$ref\": \"#/definitions/vendorExtension\"\n          }\n        }\n      }\n    },\n    \"responseValue\": {\n      \"oneOf\": [\n        {\n          \"$ref\": \"#/definitions/response\"\n        },\n        {\n          \"$ref\": \"#/definitions/jsonReference\"\n        }\n      ]\n    },\n    \"response\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"description\"\n      ],\n      \"properties\": {\n        \"description\": {\n          \"type\": \"string\"\n        },\n        \"schema\": {\n          \"oneOf\": [\n            {\n              \"$ref\": \"#/definitions/schema\"\n            },\n            {\n              \"$ref\": \"#/definitions/fileSchema\"\n            }\n          ]\n        },\n        \"headers\": {\n          \"$ref\": \"#/definitions/headers\"\n        },\n        \"examples\": {\n          \"$ref\": \"#/definitions/examples\"\n        }\n      },\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"headers\": {\n      \"type\": \"object\",\n      \"additionalProperties\": {\n        \"$ref\": \"#/definitions/header\"\n      }\n    },\n    \"header\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"type\"\n      ],\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"string\",\n            \"number\",\n            \"integer\",\n            \"boolean\",\n            \"array\"\n          ]\n        },\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"items\": {\n          \"$ref\": \"#/definitions/primitivesItems\"\n        },\n        \"collectionFormat\": {\n          \"$ref\": \"#/definitions/collectionFormat\"\n        },\n        \"default\": {\n          \"$ref\": \"#/definitions/default\"\n        },\n        \"maximum\": {\n          \"$ref\": \"#/definitions/maximum\"\n        },\n        \"exclusiveMaximum\": {\n          \"$ref\": \"#/definitions/exclusiveMaximum\"\n        },\n        \"minimum\": {\n          \"$ref\": \"#/definitions/minimum\"\n        },\n        \"exclusiveMinimum\": {\n          \"$ref\": \"#/definitions/exclusiveMinimum\"\n        },\n        \"maxLength\": {\n          \"$ref\": \"#/definitions/maxLength\"\n        },\n        \"minLength\": {\n          \"$ref\": \"#/definitions/minLength\"\n        },\n        \"pattern\": {\n          \"$ref\": \"#/definitions/pattern\"\n        },\n        \"maxItems\": {\n          \"$ref\": \"#/definitions/maxItems\"\n        },\n        \"minItems\": {\n          \"$ref\": \"#/definitions/minItems\"\n        },\n        \"uniqueItems\": {\n          \"$ref\": \"#/definitions/uniqueItems\"\n        },\n        \"enum\": {\n          \"$ref\": \"#/definitions/enum\"\n        },\n        \"multipleOf\": {\n          \"$ref\": \"#/definitions/multipleOf\"\n        },\n        \"description\": {\n          \"type\": \"string\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"vendorExtension\": {\n      \"description\": \"Any property starting with x- is valid.\",\n      \"additionalProperties\": true,\n      \"additionalItems\": true\n    },\n    \"bodyParameter\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"name\",\n        \"in\",\n        \"schema\"\n      ],\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"description\": {\n          \"type\": \"string\",\n          \"description\": \"A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed.\"\n        },\n        \"name\": {\n          \"type\": \"string\",\n          \"description\": \"The name of the parameter.\"\n        },\n        \"in\": {\n          \"type\": \"string\",\n          \"description\": \"Determines the location of the parameter.\",\n          \"enum\": [\n            \"body\"\n          ]\n        },\n        \"required\": {\n          \"type\": \"boolean\",\n          \"description\": \"Determines whether or not this parameter is required or optional.\",\n          \"default\": false\n        },\n        \"schema\": {\n          \"$ref\": \"#/definitions/schema\"\n        }\n      },\n      \"additionalProperties\": false\n    },\n    \"headerParameterSubSchema\": {\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"required\": {\n          \"type\": \"boolean\",\n          \"description\": \"Determines whether or not this parameter is required or optional.\",\n          \"default\": false\n        },\n        \"in\": {\n          \"type\": \"string\",\n          \"description\": \"Determines the location of the parameter.\",\n          \"enum\": [\n            \"header\"\n          ]\n        },\n        \"description\": {\n          \"type\": \"string\",\n          \"description\": \"A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed.\"\n        },\n        \"name\": {\n          \"type\": \"string\",\n          \"description\": \"The name of the parameter.\"\n        },\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"string\",\n            \"number\",\n            \"boolean\",\n            \"integer\",\n            \"array\"\n          ]\n        },\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"items\": {\n          \"$ref\": \"#/definitions/primitivesItems\"\n        },\n        \"collectionFormat\": {\n          \"$ref\": \"#/definitions/collectionFormat\"\n        },\n        \"default\": {\n          \"$ref\": \"#/definitions/default\"\n        },\n        \"maximum\": {\n          \"$ref\": \"#/definitions/maximum\"\n        },\n        \"exclusiveMaximum\": {\n          \"$ref\": \"#/definitions/exclusiveMaximum\"\n        },\n        \"minimum\": {\n          \"$ref\": \"#/definitions/minimum\"\n        },\n        \"exclusiveMinimum\": {\n          \"$ref\": \"#/definitions/exclusiveMinimum\"\n        },\n        \"maxLength\": {\n          \"$ref\": \"#/definitions/maxLength\"\n        },\n        \"minLength\": {\n          \"$ref\": \"#/definitions/minLength\"\n        },\n        \"pattern\": {\n          \"$ref\": \"#/definitions/pattern\"\n        },\n        \"maxItems\": {\n          \"$ref\": \"#/definitions/maxItems\"\n        },\n        \"minItems\": {\n          \"$ref\": \"#/definitions/minItems\"\n        },\n        \"uniqueItems\": {\n          \"$ref\": \"#/definitions/uniqueItems\"\n        },\n        \"enum\": {\n          \"$ref\": \"#/definitions/enum\"\n        },\n        \"multipleOf\": {\n          \"$ref\": \"#/definitions/multipleOf\"\n        }\n      }\n    },\n    \"queryParameterSubSchema\": {\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"required\": {\n          \"type\": \"boolean\",\n          \"description\": \"Determines whether or not this parameter is required or optional.\",\n          \"default\": false\n        },\n        \"in\": {\n          \"type\": \"string\",\n          \"description\": \"Determines the location of the parameter.\",\n          \"enum\": [\n            \"query\"\n          ]\n        },\n        \"description\": {\n          \"type\": \"string\",\n          \"description\": \"A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed.\"\n        },\n        \"name\": {\n          \"type\": \"string\",\n          \"description\": \"The name of the parameter.\"\n        },\n        \"allowEmptyValue\": {\n          \"type\": \"boolean\",\n          \"default\": false,\n          \"description\": \"allows sending a parameter by name only or with an empty value.\"\n        },\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"string\",\n            \"number\",\n            \"boolean\",\n            \"integer\",\n            \"array\"\n          ]\n        },\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"items\": {\n          \"$ref\": \"#/definitions/primitivesItems\"\n        },\n        \"collectionFormat\": {\n          \"$ref\": \"#/definitions/collectionFormatWithMulti\"\n        },\n        \"default\": {\n          \"$ref\": \"#/definitions/default\"\n        },\n        \"maximum\": {\n          \"$ref\": \"#/definitions/maximum\"\n        },\n        \"exclusiveMaximum\": {\n          \"$ref\": \"#/definitions/exclusiveMaximum\"\n        },\n        \"minimum\": {\n          \"$ref\": \"#/definitions/minimum\"\n        },\n        \"exclusiveMinimum\": {\n          \"$ref\": \"#/definitions/exclusiveMinimum\"\n        },\n        \"maxLength\": {\n          \"$ref\": \"#/definitions/maxLength\"\n        },\n        \"minLength\": {\n          \"$ref\": \"#/definitions/minLength\"\n        },\n        \"pattern\": {\n          \"$ref\": \"#/definitions/pattern\"\n        },\n        \"maxItems\": {\n          \"$ref\": \"#/definitions/maxItems\"\n        },\n        \"minItems\": {\n          \"$ref\": \"#/definitions/minItems\"\n        },\n        \"uniqueItems\": {\n          \"$ref\": \"#/definitions/uniqueItems\"\n        },\n        \"enum\": {\n          \"$ref\": \"#/definitions/enum\"\n        },\n        \"multipleOf\": {\n          \"$ref\": \"#/definitions/multipleOf\"\n        }\n      }\n    },\n    \"formDataParameterSubSchema\": {\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"required\": {\n          \"type\": \"boolean\",\n          \"description\": \"Determines whether or not this parameter is required or optional.\",\n          \"default\": false\n        },\n        \"in\": {\n          \"type\": \"string\",\n          \"description\": \"Determines the location of the parameter.\",\n          \"enum\": [\n            \"formData\"\n          ]\n        },\n        \"description\": {\n          \"type\": \"string\",\n          \"description\": \"A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed.\"\n        },\n        \"name\": {\n          \"type\": \"string\",\n          \"description\": \"The name of the parameter.\"\n        },\n        \"allowEmptyValue\": {\n          \"type\": \"boolean\",\n          \"default\": false,\n          \"description\": \"allows sending a parameter by name only or with an empty value.\"\n        },\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"string\",\n            \"number\",\n            \"boolean\",\n            \"integer\",\n            \"array\",\n            \"file\"\n          ]\n        },\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"items\": {\n          \"$ref\": \"#/definitions/primitivesItems\"\n        },\n        \"collectionFormat\": {\n          \"$ref\": \"#/definitions/collectionFormatWithMulti\"\n        },\n        \"default\": {\n          \"$ref\": \"#/definitions/default\"\n        },\n        \"maximum\": {\n          \"$ref\": \"#/definitions/maximum\"\n        },\n        \"exclusiveMaximum\": {\n          \"$ref\": \"#/definitions/exclusiveMaximum\"\n        },\n        \"minimum\": {\n          \"$ref\": \"#/definitions/minimum\"\n        },\n        \"exclusiveMinimum\": {\n          \"$ref\": \"#/definitions/exclusiveMinimum\"\n        },\n        \"maxLength\": {\n          \"$ref\": \"#/definitions/maxLength\"\n        },\n        \"minLength\": {\n          \"$ref\": \"#/definitions/minLength\"\n        },\n        \"pattern\": {\n          \"$ref\": \"#/definitions/pattern\"\n        },\n        \"maxItems\": {\n          \"$ref\": \"#/definitions/maxItems\"\n        },\n        \"minItems\": {\n          \"$ref\": \"#/definitions/minItems\"\n        },\n        \"uniqueItems\": {\n          \"$ref\": \"#/definitions/uniqueItems\"\n        },\n        \"enum\": {\n          \"$ref\": \"#/definitions/enum\"\n        },\n        \"multipleOf\": {\n          \"$ref\": \"#/definitions/multipleOf\"\n        }\n      }\n    },\n    \"pathParameterSubSchema\": {\n      \"additionalProperties\": false,\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"required\": [\n        \"required\"\n      ],\n      \"properties\": {\n        \"required\": {\n          \"type\": \"boolean\",\n          \"enum\": [\n            true\n          ],\n          \"description\": \"Determines whether or not this parameter is required or optional.\"\n        },\n        \"in\": {\n          \"type\": \"string\",\n          \"description\": \"Determines the location of the parameter.\",\n          \"enum\": [\n            \"path\"\n          ]\n        },\n        \"description\": {\n          \"type\": \"string\",\n          \"description\": \"A brief description of the parameter. This could contain examples of use.  GitHub Flavored Markdown is allowed.\"\n        },\n        \"name\": {\n          \"type\": \"string\",\n          \"description\": \"The name of the parameter.\"\n        },\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"string\",\n            \"number\",\n            \"boolean\",\n            \"integer\",\n            \"array\"\n          ]\n        },\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"items\": {\n          \"$ref\": \"#/definitions/primitivesItems\"\n        },\n        \"collectionFormat\": {\n          \"$ref\": \"#/definitions/collectionFormat\"\n        },\n        \"default\": {\n          \"$ref\": \"#/definitions/default\"\n        },\n        \"maximum\": {\n          \"$ref\": \"#/definitions/maximum\"\n        },\n        \"exclusiveMaximum\": {\n          \"$ref\": \"#/definitions/exclusiveMaximum\"\n        },\n        \"minimum\": {\n          \"$ref\": \"#/definitions/minimum\"\n        },\n        \"exclusiveMinimum\": {\n          \"$ref\": \"#/definitions/exclusiveMinimum\"\n        },\n        \"maxLength\": {\n          \"$ref\": \"#/definitions/maxLength\"\n        },\n        \"minLength\": {\n          \"$ref\": \"#/definitions/minLength\"\n        },\n        \"pattern\": {\n          \"$ref\": \"#/definitions/pattern\"\n        },\n        \"maxItems\": {\n          \"$ref\": \"#/definitions/maxItems\"\n        },\n        \"minItems\": {\n          \"$ref\": \"#/definitions/minItems\"\n        },\n        \"uniqueItems\": {\n          \"$ref\": \"#/definitions/uniqueItems\"\n        },\n        \"enum\": {\n          \"$ref\": \"#/definitions/enum\"\n        },\n        \"multipleOf\": {\n          \"$ref\": \"#/definitions/multipleOf\"\n        }\n      }\n    },\n    \"nonBodyParameter\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"name\",\n        \"in\",\n        \"type\"\n      ],\n      \"oneOf\": [\n        {\n          \"$ref\": \"#/definitions/headerParameterSubSchema\"\n        },\n        {\n          \"$ref\": \"#/definitions/formDataParameterSubSchema\"\n        },\n        {\n          \"$ref\": \"#/definitions/queryParameterSubSchema\"\n        },\n        {\n          \"$ref\": \"#/definitions/pathParameterSubSchema\"\n        }\n      ]\n    },\n    \"parameter\": {\n      \"oneOf\": [\n        {\n          \"$ref\": \"#/definitions/bodyParameter\"\n        },\n        {\n          \"$ref\": \"#/definitions/nonBodyParameter\"\n        }\n      ]\n    },\n    \"schema\": {\n      \"type\": \"object\",\n      \"description\": \"A deterministic version of a JSON Schema object.\",\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"properties\": {\n        \"$ref\": {\n          \"type\": \"string\"\n        },\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"title\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/title\"\n        },\n        \"description\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/description\"\n        },\n        \"default\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/default\"\n        },\n        \"multipleOf\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/multipleOf\"\n        },\n        \"maximum\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/maximum\"\n        },\n        \"exclusiveMaximum\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/exclusiveMaximum\"\n        },\n        \"minimum\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/minimum\"\n        },\n        \"exclusiveMinimum\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/exclusiveMinimum\"\n        },\n        \"maxLength\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveInteger\"\n        },\n        \"minLength\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0\"\n        },\n        \"pattern\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/pattern\"\n        },\n        \"maxItems\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveInteger\"\n        },\n        \"minItems\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0\"\n        },\n        \"uniqueItems\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/uniqueItems\"\n        },\n        \"maxProperties\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveInteger\"\n        },\n        \"minProperties\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0\"\n        },\n        \"required\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/stringArray\"\n        },\n        \"enum\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/enum\"\n        },\n        \"additionalProperties\": {\n          \"anyOf\": [\n            {\n              \"$ref\": \"#/definitions/schema\"\n            },\n            {\n              \"type\": \"boolean\"\n            }\n          ],\n          \"default\": {}\n        },\n        \"type\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/type\"\n        },\n        \"items\": {\n          \"anyOf\": [\n            {\n              \"$ref\": \"#/definitions/schema\"\n            },\n            {\n              \"type\": \"array\",\n              \"minItems\": 1,\n              \"items\": {\n                \"$ref\": \"#/definitions/schema\"\n              }\n            }\n          ],\n          \"default\": {}\n        },\n        \"allOf\": {\n          \"type\": \"array\",\n          \"minItems\": 1,\n          \"items\": {\n            \"$ref\": \"#/definitions/schema\"\n          }\n        },\n        \"properties\": {\n          \"type\": \"object\",\n          \"additionalProperties\": {\n            \"$ref\": \"#/definitions/schema\"\n          },\n          \"default\": {}\n        },\n        \"discriminator\": {\n          \"type\": \"string\"\n        },\n        \"readOnly\": {\n          \"type\": \"boolean\",\n          \"default\": false\n        },\n        \"xml\": {\n          \"$ref\": \"#/definitions/xml\"\n        },\n        \"externalDocs\": {\n          \"$ref\": \"#/definitions/externalDocs\"\n        },\n        \"example\": {}\n      },\n      \"additionalProperties\": false\n    },\n    \"fileSchema\": {\n      \"type\": \"object\",\n      \"description\": \"A deterministic version of a JSON Schema object.\",\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      },\n      \"required\": [\n        \"type\"\n      ],\n      \"properties\": {\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"title\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/title\"\n        },\n        \"description\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/description\"\n        },\n        \"default\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/default\"\n        },\n        \"required\": {\n          \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/stringArray\"\n        },\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"file\"\n          ]\n        },\n        \"readOnly\": {\n          \"type\": \"boolean\",\n          \"default\": false\n        },\n        \"externalDocs\": {\n          \"$ref\": \"#/definitions/externalDocs\"\n        },\n        \"example\": {}\n      },\n      \"additionalProperties\": false\n    },\n    \"primitivesItems\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"string\",\n            \"number\",\n            \"integer\",\n            \"boolean\",\n            \"array\"\n          ]\n        },\n        \"format\": {\n          \"type\": \"string\"\n        },\n        \"items\": {\n          \"$ref\": \"#/definitions/primitivesItems\"\n        },\n        \"collectionFormat\": {\n          \"$ref\": \"#/definitions/collectionFormat\"\n        },\n        \"default\": {\n          \"$ref\": \"#/definitions/default\"\n        },\n        \"maximum\": {\n          \"$ref\": \"#/definitions/maximum\"\n        },\n        \"exclusiveMaximum\": {\n          \"$ref\": \"#/definitions/exclusiveMaximum\"\n        },\n        \"minimum\": {\n          \"$ref\": \"#/definitions/minimum\"\n        },\n        \"exclusiveMinimum\": {\n          \"$ref\": \"#/definitions/exclusiveMinimum\"\n        },\n        \"maxLength\": {\n          \"$ref\": \"#/definitions/maxLength\"\n        },\n        \"minLength\": {\n          \"$ref\": \"#/definitions/minLength\"\n        },\n        \"pattern\": {\n          \"$ref\": \"#/definitions/pattern\"\n        },\n        \"maxItems\": {\n          \"$ref\": \"#/definitions/maxItems\"\n        },\n        \"minItems\": {\n          \"$ref\": \"#/definitions/minItems\"\n        },\n        \"uniqueItems\": {\n          \"$ref\": \"#/definitions/uniqueItems\"\n        },\n        \"enum\": {\n          \"$ref\": \"#/definitions/enum\"\n        },\n        \"multipleOf\": {\n          \"$ref\": \"#/definitions/multipleOf\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"security\": {\n      \"type\": \"array\",\n      \"items\": {\n        \"$ref\": \"#/definitions/securityRequirement\"\n      },\n      \"uniqueItems\": true\n    },\n    \"securityRequirement\": {\n      \"type\": \"object\",\n      \"additionalProperties\": {\n        \"type\": \"array\",\n        \"items\": {\n          \"type\": \"string\"\n        },\n        \"uniqueItems\": true\n      }\n    },\n    \"xml\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"namespace\": {\n          \"type\": \"string\"\n        },\n        \"prefix\": {\n          \"type\": \"string\"\n        },\n        \"attribute\": {\n          \"type\": \"boolean\",\n          \"default\": false\n        },\n        \"wrapped\": {\n          \"type\": \"boolean\",\n          \"default\": false\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"tag\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"name\"\n      ],\n      \"properties\": {\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"description\": {\n          \"type\": \"string\"\n        },\n        \"externalDocs\": {\n          \"$ref\": \"#/definitions/externalDocs\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"securityDefinitions\": {\n      \"type\": \"object\",\n      \"additionalProperties\": {\n        \"oneOf\": [\n          {\n            \"$ref\": \"#/definitions/basicAuthenticationSecurity\"\n          },\n          {\n            \"$ref\": \"#/definitions/apiKeySecurity\"\n          },\n          {\n            \"$ref\": \"#/definitions/oauth2ImplicitSecurity\"\n          },\n          {\n            \"$ref\": \"#/definitions/oauth2PasswordSecurity\"\n          },\n          {\n            \"$ref\": \"#/definitions/oauth2ApplicationSecurity\"\n          },\n          {\n            \"$ref\": \"#/definitions/oauth2AccessCodeSecurity\"\n          }\n        ]\n      }\n    },\n    \"basicAuthenticationSecurity\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"type\"\n      ],\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"basic\"\n          ]\n        },\n        \"description\": {\n          \"type\": \"string\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"apiKeySecurity\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"type\",\n        \"name\",\n        \"in\"\n      ],\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"apiKey\"\n          ]\n        },\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"in\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"header\",\n            \"query\"\n          ]\n        },\n        \"description\": {\n          \"type\": \"string\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"oauth2ImplicitSecurity\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"type\",\n        \"flow\",\n        \"authorizationUrl\"\n      ],\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"oauth2\"\n          ]\n        },\n        \"flow\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"implicit\"\n          ]\n        },\n        \"scopes\": {\n          \"$ref\": \"#/definitions/oauth2Scopes\"\n        },\n        \"authorizationUrl\": {\n          \"type\": \"string\",\n          \"format\": \"uri\"\n        },\n        \"description\": {\n          \"type\": \"string\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"oauth2PasswordSecurity\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"type\",\n        \"flow\",\n        \"tokenUrl\"\n      ],\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"oauth2\"\n          ]\n        },\n        \"flow\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"password\"\n          ]\n        },\n        \"scopes\": {\n          \"$ref\": \"#/definitions/oauth2Scopes\"\n        },\n        \"tokenUrl\": {\n          \"type\": \"string\",\n          \"format\": \"uri\"\n        },\n        \"description\": {\n          \"type\": \"string\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"oauth2ApplicationSecurity\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"type\",\n        \"flow\",\n        \"tokenUrl\"\n      ],\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"oauth2\"\n          ]\n        },\n        \"flow\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"application\"\n          ]\n        },\n        \"scopes\": {\n          \"$ref\": \"#/definitions/oauth2Scopes\"\n        },\n        \"tokenUrl\": {\n          \"type\": \"string\",\n          \"format\": \"uri\"\n        },\n        \"description\": {\n          \"type\": \"string\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"oauth2AccessCodeSecurity\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"type\",\n        \"flow\",\n        \"authorizationUrl\",\n        \"tokenUrl\"\n      ],\n      \"properties\": {\n        \"type\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"oauth2\"\n          ]\n        },\n        \"flow\": {\n          \"type\": \"string\",\n          \"enum\": [\n            \"accessCode\"\n          ]\n        },\n        \"scopes\": {\n          \"$ref\": \"#/definitions/oauth2Scopes\"\n        },\n        \"authorizationUrl\": {\n          \"type\": \"string\",\n          \"format\": \"uri\"\n        },\n        \"tokenUrl\": {\n          \"type\": \"string\",\n          \"format\": \"uri\"\n        },\n        \"description\": {\n          \"type\": \"string\"\n        }\n      },\n      \"patternProperties\": {\n        \"^x-\": {\n          \"$ref\": \"#/definitions/vendorExtension\"\n        }\n      }\n    },\n    \"oauth2Scopes\": {\n      \"type\": \"object\",\n      \"additionalProperties\": {\n        \"type\": \"string\"\n      }\n    },\n    \"mediaTypeList\": {\n      \"type\": \"array\",\n      \"items\": {\n        \"$ref\": \"#/definitions/mimeType\"\n      },\n      \"uniqueItems\": true\n    },\n    \"parametersList\": {\n      \"type\": \"array\",\n      \"description\": \"The parameters needed to send a valid API call.\",\n      \"additionalItems\": false,\n      \"items\": {\n        \"oneOf\": [\n          {\n            \"$ref\": \"#/definitions/parameter\"\n          },\n          {\n            \"$ref\": \"#/definitions/jsonReference\"\n          }\n        ]\n      },\n      \"uniqueItems\": true\n    },\n    \"schemesList\": {\n      \"type\": \"array\",\n      \"description\": \"The transfer protocol of the API.\",\n      \"items\": {\n        \"type\": \"string\",\n        \"enum\": [\n          \"http\",\n          \"https\",\n          \"ws\",\n          \"wss\"\n        ]\n      },\n      \"uniqueItems\": true\n    },\n    \"collectionFormat\": {\n      \"type\": \"string\",\n      \"enum\": [\n        \"csv\",\n        \"ssv\",\n        \"tsv\",\n        \"pipes\"\n      ],\n      \"default\": \"csv\"\n    },\n    \"collectionFormatWithMulti\": {\n      \"type\": \"string\",\n      \"enum\": [\n        \"csv\",\n        \"ssv\",\n        \"tsv\",\n        \"pipes\",\n        \"multi\"\n      ],\n      \"default\": \"csv\"\n    },\n    \"title\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/title\"\n    },\n    \"description\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/description\"\n    },\n    \"default\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/default\"\n    },\n    \"multipleOf\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/multipleOf\"\n    },\n    \"maximum\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/maximum\"\n    },\n    \"exclusiveMaximum\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/exclusiveMaximum\"\n    },\n    \"minimum\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/minimum\"\n    },\n    \"exclusiveMinimum\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/exclusiveMinimum\"\n    },\n    \"maxLength\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveInteger\"\n    },\n    \"minLength\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0\"\n    },\n    \"pattern\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/pattern\"\n    },\n    \"maxItems\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveInteger\"\n    },\n    \"minItems\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0\"\n    },\n    \"uniqueItems\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/uniqueItems\"\n    },\n    \"enum\": {\n      \"$ref\": \"http://json-schema.org/draft-04/schema#/properties/enum\"\n    },\n    \"jsonReference\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"$ref\"\n      ],\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"$ref\": {\n          \"type\": \"string\"\n        }\n      }\n    }\n  }\n}","module.exports={\n    \"id\": \"http://json-schema.org/draft-04/schema#\",\n    \"$schema\": \"http://json-schema.org/draft-04/schema#\",\n    \"description\": \"Core schema meta-schema\",\n    \"definitions\": {\n        \"schemaArray\": {\n            \"type\": \"array\",\n            \"minItems\": 1,\n            \"items\": { \"$ref\": \"#\" }\n        },\n        \"positiveInteger\": {\n            \"type\": \"integer\",\n            \"minimum\": 0\n        },\n        \"positiveIntegerDefault0\": {\n            \"allOf\": [ { \"$ref\": \"#/definitions/positiveInteger\" }, { \"default\": 0 } ]\n        },\n        \"simpleTypes\": {\n            \"enum\": [ \"array\", \"boolean\", \"integer\", \"null\", \"number\", \"object\", \"string\" ]\n        },\n        \"stringArray\": {\n            \"type\": \"array\",\n            \"items\": { \"type\": \"string\" },\n            \"minItems\": 1,\n            \"uniqueItems\": true\n        }\n    },\n    \"type\": \"object\",\n    \"properties\": {\n        \"id\": {\n            \"type\": \"string\",\n            \"format\": \"uri\"\n        },\n        \"$schema\": {\n            \"type\": \"string\",\n            \"format\": \"uri\"\n        },\n        \"title\": {\n            \"type\": \"string\"\n        },\n        \"description\": {\n            \"type\": \"string\"\n        },\n        \"default\": {},\n        \"multipleOf\": {\n            \"type\": \"number\",\n            \"minimum\": 0,\n            \"exclusiveMinimum\": true\n        },\n        \"maximum\": {\n            \"type\": \"number\"\n        },\n        \"exclusiveMaximum\": {\n            \"type\": \"boolean\",\n            \"default\": false\n        },\n        \"minimum\": {\n            \"type\": \"number\"\n        },\n        \"exclusiveMinimum\": {\n            \"type\": \"boolean\",\n            \"default\": false\n        },\n        \"maxLength\": { \"$ref\": \"#/definitions/positiveInteger\" },\n        \"minLength\": { \"$ref\": \"#/definitions/positiveIntegerDefault0\" },\n        \"pattern\": {\n            \"type\": \"string\",\n            \"format\": \"regex\"\n        },\n        \"additionalItems\": {\n            \"anyOf\": [\n                { \"type\": \"boolean\" },\n                { \"$ref\": \"#\" }\n            ],\n            \"default\": {}\n        },\n        \"items\": {\n            \"anyOf\": [\n                { \"$ref\": \"#\" },\n                { \"$ref\": \"#/definitions/schemaArray\" }\n            ],\n            \"default\": {}\n        },\n        \"maxItems\": { \"$ref\": \"#/definitions/positiveInteger\" },\n        \"minItems\": { \"$ref\": \"#/definitions/positiveIntegerDefault0\" },\n        \"uniqueItems\": {\n            \"type\": \"boolean\",\n            \"default\": false\n        },\n        \"maxProperties\": { \"$ref\": \"#/definitions/positiveInteger\" },\n        \"minProperties\": { \"$ref\": \"#/definitions/positiveIntegerDefault0\" },\n        \"required\": { \"$ref\": \"#/definitions/stringArray\" },\n        \"additionalProperties\": {\n            \"anyOf\": [\n                { \"type\": \"boolean\" },\n                { \"$ref\": \"#\" }\n            ],\n            \"default\": {}\n        },\n        \"definitions\": {\n            \"type\": \"object\",\n            \"additionalProperties\": { \"$ref\": \"#\" },\n            \"default\": {}\n        },\n        \"properties\": {\n            \"type\": \"object\",\n            \"additionalProperties\": { \"$ref\": \"#\" },\n            \"default\": {}\n        },\n        \"patternProperties\": {\n            \"type\": \"object\",\n            \"additionalProperties\": { \"$ref\": \"#\" },\n            \"default\": {}\n        },\n        \"dependencies\": {\n            \"type\": \"object\",\n            \"additionalProperties\": {\n                \"anyOf\": [\n                    { \"$ref\": \"#\" },\n                    { \"$ref\": \"#/definitions/stringArray\" }\n                ]\n            }\n        },\n        \"enum\": {\n            \"type\": \"array\",\n            \"minItems\": 1,\n            \"uniqueItems\": true\n        },\n        \"type\": {\n            \"anyOf\": [\n                { \"$ref\": \"#/definitions/simpleTypes\" },\n                {\n                    \"type\": \"array\",\n                    \"items\": { \"$ref\": \"#/definitions/simpleTypes\" },\n                    \"minItems\": 1,\n                    \"uniqueItems\": true\n                }\n            ]\n        },\n        \"allOf\": { \"$ref\": \"#/definitions/schemaArray\" },\n        \"anyOf\": { \"$ref\": \"#/definitions/schemaArray\" },\n        \"oneOf\": { \"$ref\": \"#/definitions/schemaArray\" },\n        \"not\": { \"$ref\": \"#\" }\n    },\n    \"dependencies\": {\n        \"exclusiveMaximum\": [ \"maximum\" ],\n        \"exclusiveMinimum\": [ \"minimum\" ]\n    },\n    \"default\": {}\n}\n"]}