ViewModelProvider get(@nonnull String key, @nonnull Class<T> modelClass)

ViewModelProvider.java

public <T extends ViewModel> T get(@NonNull String key, @NonNull Class<T> modelClass) {
    ViewModel viewModel = mViewModelStore.get(key);

    if (modelClass.isInstance(viewModel)) {
      return (T) viewModel;
    } else {
       // Сode
    }

    viewModel = mFactory.create(modelClass);
    mViewModelStore.put(key, viewModel);
    return (T) viewModel;
  }