@Override
    public void onHiddenChanged(boolean hidden) {
        Log.d(TAG, "onHiddenChanged: " + hidden);
        if (!hidden){
            AppCompatActivity currentActivity = ((AppCompatActivity) getActivity());
            if (toolbar != null) {
                currentActivity.setSupportActionBar(toolbar);
                currentActivity.getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            }
        }
        super.onHiddenChanged(hidden);
    }