private static IObservable <T> GetObservable <T>(PressableModel model, string eventName)
 {
     return(ModelObservable.GetObservable <PressableModel, T>(model, eventName));
 }
 private static IObservable <T> GetObservable <T>(ManipulatableModel model, string eventName)
 {
     return(ModelObservable.GetObservable <ManipulatableModel, T>(model, eventName));
 }