get<T extends ViewModel> method

T get<T extends ViewModel>({ String key = "", })

Returns the ViewModel present in the scope or creates one

If the ViewModel is already present in the scope then it just returns it So this method is safe to call within Widget.build()

ViewModel in the scope is identified using it's type by default If you want multiple ViewModels of the same type in a scope, then you can use the key parameter to distinguish the different ViewModels of the same type

Implementation

T get<T extends ViewModel>({String key = ""}) {
  final T? viewModel = viewModelStore.get<T>(key: key);
  if (viewModel != null) {
    return viewModel;
  }
  // if viewModel is null, create a new one
  final T newViewModel = viewModelFactory.create<T>();
  viewModelStore.put(newViewModel, key: key);
  return newViewModel;
}