public override void InitializeTechnologyTreeScreen(TechnologyTreeScreenViewModel viewModel) {
     base.InitializeTechnologyTreeScreen(viewModel);
     // This is called when a TechonologyTreeScreenViewModel is created
 }
 public virtual void InitializeTechnologyTreeScreen(TechnologyTreeScreenViewModel viewModel) {
     // This is called when a TechnologyTreeScreenViewModel is created
     TechnologyTreeScreenViewModelManager.Add(viewModel);
 }