return function ()
  require('aerial').setup({
   -- Your configuration here
   -- To auto-open the aerial window on entering a buffer:
   on_attach = function(bufnr)
     vim.keymap.set("n", "{", "<cmd>AerialPrev<CR>", { buffer = bufnr })
     vim.keymap.set("n", "}", "<cmd>AerialNext<CR>", { buffer = bufnr })
     require('aerial').open({focus = false})
   end
  })
end