return {
  -- keys for a specific server name will be used for that LSP
  --jdtls = function(server, opts)
  --  -- custom sumneko_lua setup handler
  --  require("lspconfig")["sumneko_lua"].setup(opts)
  --end,
  rust_analyzer = function(_, opts) require("rust-tools").setup { server = opts } end,

  jdtls = function(_, opts)
    vim.api.nvim_create_autocmd("Filetype", {
      pattern = "java", -- autocmd to start jdtls
      callback = function()
        if opts.root_dir and opts.root_dir ~= "" then require("jdtls").start_or_attach(opts) end
      end,
    })
  end,
}