<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def list_sas(self, filters=None):
 """Retrieve active IKE_SAs and associated CHILD_SAs. :param filters: retrieve only matching IKE_SAs (optional) :type filters: dict :return: list of active IKE_SAs and associated CHILD_SAs :rtype: list """

        _, sa_list = self.handler.streamed_request("list-sas",
                                                   "list-sa", filters)
        return sa_list