return function()
  local bufferline = require "bufferline"
  bufferline.setup {
    options = {
      mode = "buffers", -- set to "tabs" to only show tabpages instead
      style_preset = bufferline.style_preset.default, -- or bufferline.style_preset.minimal,
      themable = true, -- allows highlight groups to be overriden i.e. sets highlights as default
      --numbers = function(opts)
      --	return string.format("%s·%s", opts.raise(opts.id), opts.lower(opts.ordinal))
      --end,
      indicator = {
        icon = "▎", -- this should be omitted if indicator style is not 'icon'
        style = "icon",
      },
      diagnostics = "nvim_lsp",
      diagnostics_update_in_insert = false,
      offsets = {
        {
          filetype = "neo-tree",
          text = require("custom_opts").file_explorer_title,
          text_align = "left",
          separator = true,
        },
      },
      color_icons = true, -- whether or not to add the filetype icon highlights
      separator_style = require("custom_opts").tab_style,
      hover = {
        enabled = true,
        delay = 200,
        reveal = { "close" },
      },
    },
  }
end