efl/src/lib/elementary/efl_ui_item_part_extra.eo

class @beta Efl.Ui.Item_Part_Extra extends Efl.Ui.Layout_Part implements Efl.Content
{
   [[Item internal content of extra part class]]
	data: null;
   implements {
      Efl.Content.content { get; set; }
      Efl.Content.content_unset;
   }
}