efl/src/lib/elementary/efl_ui_progressbar_internal_part.eo

class Efl.Ui.Progressbar.Internal.Part (Elm.Layout.Internal.Part, Efl.Ui.Progress)
{
   [[Elementary progressbar internal part class]]
   data: Elm_Part_Data;
   implements {
      Efl.Container.content { set; }
      Efl.Ui.Progress.progress_value { set; get; }
   }
}