require("barbar").setup({
    sidebar_filetypes = {   -- Set the filetypes which barbar will offset itself for
    -- Use the default values: {event = 'BufWinLeave', text = '', align = 'left'}
    NvimTree = true,
    -- Or, specify the text used for the offset:
    undotree = {
      text = 'undotree',
      align = 'left', -- *optionally* specify an alignment (either 'left', 'center', or 'right')
    },
    -- Or, specify the event which the sidebar executes when leaving:
    ['neo-tree'] = {event = 'BufWipeout'},
    -- Or, specify all three
    Outline = {event = 'BufWinLeave', text = 'symbols-outline', align = 'right'},
  },
})