def DeleteMessageHandlerRequests(self, requests):
    """Deletes a list of message handler requests from the database."""

    for r in requests:
      flow_dict = self.message_handler_requests.get(r.handler_name, {})
      if r.request_id in flow_dict:
        del flow_dict[r.request_id]
      flow_dict = self.message_handler_leases.get(r.handler_name, {})
      if r.request_id in flow_dict:
        del flow_dict[r.request_id]