public override void DisposingViewModel(uFrame.MVVM.ViewModel viewModel)
 {
     base.DisposingViewModel(viewModel);
     EventMaskViewModelManager.Remove(viewModel);
 }
 public virtual void InitializeEventMask(EventMaskViewModel viewModel)
 {
     // This is called when a EventMaskViewModel is created
     EventMaskViewModelManager.Add(viewModel);
 }