code: public FragmentController<F> create(final int contentViewId, final Bundle bundle) {
      shadowMainLooper.runPaused(new Runnable() {
        @Override
        public void run() {
          activityController.create(bundle).get().getFragmentManager().beginTransaction().add(contentViewId, fragment).commit();
        }
      });
      return this;
    }
docs: Creates the activity with {@link Bundle} and adds the fragment to the view with ID {@code contentViewId}.