public override void InitializeParallelScreen(ParallelScreenViewModel viewModel) {
     base.InitializeParallelScreen(viewModel);
     // This is called when a ParallelScreenViewModel is created
 }
 public virtual void InitializeParallelScreen(ParallelScreenViewModel viewModel) {
     // This is called when a ParallelScreenViewModel is created
     ParallelScreenViewModelManager.Add(viewModel);
 }