How do call a function for keymap action?

[ckoehler]

In keymaps I have:

    {
      key = "<leader>ll";
      mode = "n";
      silent = true;
      action = mkLuaInline ''
        function()
          local new_config = not vim.diagnostic.config().virtual_lines
          vim.diagnostic.config({virtual_lines = new_config})
        end
      '';
      desc = "Toggle Virtual Lines";
    }

But that doesn't work, because it's a string. In my main config, vim.keymap.set can take a function.

Thanks!

[ckoehler]

Oh, should've kept scrolling. lua = true; does the trick.