public override void InitializeConferenceScreen(ConferenceScreenViewModel viewModel) {
     base.InitializeConferenceScreen(viewModel);
     // This is called when a ConferenceScreenViewModel is created
 }
 public virtual void InitializeConferenceScreen(ConferenceScreenViewModel viewModel) {
     // This is called when a ConferenceScreenViewModel is created
     ConferenceScreenViewModelManager.Add(viewModel);
 }