public static TView WithAbs <TView>(this TView view, AbsFlags flags, double x, double y, double width, double height) where TView : VisualElement
 {
     view.WithAbsFlags(flags);
     view.WithAbsBounds(x, y, width, height);
     return(view);
 }
 public static TView WithAbsFlags <TView>(this TView view, AbsFlags flags) where TView : VisualElement
 {
     AbsoluteLayout.SetLayoutFlags(view, (AbsoluteLayoutFlags)flags);
     return(view);
 }