<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_es(self):
 """Returns an `Elasticsearch`. * If there's an s, then it returns that `Elasticsearch`. * If the es was provided in the constructor, then it returns that `Elasticsearch`. * Otherwise, it creates a new `Elasticsearch` and returns that. Override this if that behavior isn't correct for you. """

        if self.s:
            return self.s.get_es()

        return self.es or get_es()