mixin Efl.Ui.Focus.Composition (Efl.Interface, Elm.Widget ) {
   [[This defines the inheriting widget as Composition widget.

     A composition widget is a widget that is just the logical parent of a other set of widgets thet can be used as interaction.
   ]]
   methods {
      @property composition_elements @protected  {
         [[Set the order of elements that will be used for composition

           Elements of the list can be either A Elm.Widget, A Efl.Ui.Focus.Object, or a Efl.Gfx.

           If the element is a Efl.Gfx, then the geometry is used as focus geomtry, the focus property is redirected to the evas focus property. The mixin will take care of reistering.

           If the element is a Efl.Ui.Focus.Object, then the mixin will take care of registering the element.

           For the case that the element is a Elm.Widget nothing is done and the widget is just part of the order.
         ]]
         values {
            logical_order : list<Efl.Gfx> @owned; [[The order to use]]
         }
      }
      elements_flush {
        [[Function that will emit prepare if this is marked as dirty]]
      }

      dirty @protected {
         [[ Mark this widget as dirty, the children can be considered to be changed after that call
         ]]
      }
      prepare @protected {
         [[A call to prepare the children of this element, called if marked as dirty

           You can use this function to call composition_elements.
         ]]
      }
      @property custom_manager @protected {
         [[Register all children in this manager

           Set to $null to register them in the same manager as the implementor is
         ]]
         values {
            custom_manager : Efl.Ui.Focus.Manager;
         }
      }
      @property logical_mode @protected {
         [[Set to true if all children should be registered as logicals]]
         values {
            logical_mode : bool; [[$true or $false]]
         }
      }
   }
   implements {
      Elm.Widget.focus_state_apply;
      Efl.Ui.Focus.Object.prepare_logical;
      @empty .prepare;
   }
}