require('virt-column').setup {
  char = '│', -- ref: https://github.com/lukas-reineke/indent-blankline.nvim/blob/7075d7861f7a6bbf0de0298c83f8a13195e6ec01/doc/indent_blankline.txt#L159
  hightlight = 'IblIndent', -- ref: https://github.com/lukas-reineke/indent-blankline.nvim/blob/0fe34b4c1b926e106d105d3ae88ef6cbf6743572/doc/indent_blankline.txt#L296
}