def hasReturnTo(self):
        return self.getReturnTo() is not None
A function to handle the sort expression API differences in 1.6.4
dataset/ETHPy150Open CollabQ/CollabQ/openid/server/server.py/ProtocolError.hasReturnTo--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/appengine-search-python-java/product_search_python/sortoptions.py/get_sort_options