How would you communicate between two Fragments?

public class SharedViewModel extends ViewModel {
 private final MutableLiveData < Item > selected = new MutableLiveData < Item > ();

 public void select(Item item) {
  selected.setValue(item);
 }

 public LiveData < Item > getSelected() {
  return selected;
 }
}


public class MasterFragment extends Fragment {
 private SharedViewModel model;
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  model = ViewModelProviders.of(getActivity()).get(SharedViewModel.class);
  itemSelector.setOnClickListener(item -> {
   model.select(item);
  });
 }
}


public class DetailFragment extends Fragment {
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  SharedViewModel model = ViewModelProviders.of(getActivity()).get(SharedViewModel.class);
  model.getSelected().observe(this, {
   item ->
   // Update the UI.
  });
 }
}