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

   This model provide the same feature as @Efl.Ui.Exact_Model except for the
   @Efl.Model.property $["total.width"] and $["total.height"] which reflect an
   estimated value of the total size by using the currently know size from its
   children as an average size for all its children. As more children fill
   $["self.width"] and $["self.height"], this model will figure out a more precise
   answer. Once all children size is known, the result will be exact and the same
   as @Efl.Ui.Exact_Model.

   This model only supporting vertical list at this point.]]

   implements {
      Efl.Object.constructor;
      Efl.Model.property { set; get; }
   }
}