mCityHelper
        .list()
        .flatMap(new Func1<ResultEvent, Observable<Cursor>>() {
            @Override
            public Observable<Cursor> call(ResultEvent resultEvent) {
                return operator.when().getUserCityIsFinished();
            }
        })
        .subscribe(new Action1<Cursor>() {
            @Override
            public void call(Cursor cursor) {
                Timber.d("Cursor received");
                if(cursor != null && cursor.moveToFirst()) {
                    Timber.d("Received cities: " + cursor.getCount());
                }
            }
        });