docs: 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]