static void OnEmptyControllerChanged(BindableObject b, EmptyLayoutController oldC, EmptyLayoutController newC)
        {
            if (newC == null)
            {
                return;
            }

            newC.EmptyTemplate = GetEmptyTemplate(b);

            // TODO: Figure out if a selector makes sense...
        }
 static void SetEmptyLayoutController(BindableObject b, EmptyLayoutController value)
 {
     b.SetValue(EmptyLayoutControllerProperty, value);
 }