class @beta Efl.Ui.Size_Model extends Efl.Composite_Model
{
   [[Class to be used to store object item size for List/Grid View.

   This model provide the following properties that can be retrieved by
   @Efl.Model.properties.get :
   - $["self.width"] and $["self.height"] define the size of this object from the point of
   view of the @Efl.Ui.View that use it. They only apply to children and not to the
   top root object.
   - $["item.width"] and $["item.height"] define all the children size and are available
   only on @Efl.Ui.Size_Model that do have children.
   - $["total.width"] and $["total.height"] define the accumulated size used by all the children.
   Only vertical list accumulation logic is implemented at this point.]]

   data: null;
   implements {
      Efl.Model.properties { get; }
   }
}