efl/src/lib/elementary/efl_ui_layout_part_content.eo

class Efl.Ui.Layout.Part_Content (Efl.Ui.Layout.Part, Efl.Content)
{
   [[Elementary layout internal part class]]
   data: null;
   implements {
      Efl.Content.content { get; set; }
      Efl.Content.content_unset;
   }
}