public static object GetLinked <T>(this IMvvmContext ctx, object o) => ctx.GetLinked(o, typeof(T), typeof(IViewClassDefault));
 public static object GetLinked <TMode, TClass>(this IMvvmContext ctx, object o) => ctx.GetLinked(o, typeof(TMode), typeof(TClass));
 public static object GetLinked <T>(this IMvvmContext ctx, object o, Type viewClass) => ctx.GetLinked(o, typeof(T), viewClass);