code: def DeleteFlowRequests(self, requests):
      
      for request in requests:
        if (request.client_id, request.flow_id) not in self.flows:
          raise db.UnknownFlowError(request.client_id, request.flow_id)
  
      for request in requests:
        key = (request.client_id, request.flow_id)
        request_dict = self.flow_requests.get(key, {})
        try:
          del request_dict[request.request_id]
        except KeyError:
          raise db.UnknownFlowRequestError(request.client_id, request.flow_id,
                                           request.request_id)
  
        response_dict = self.flow_responses.get(key, {})
        try:
          del response_dict[request.request_id]
        except KeyError:
          pass
docs: Deletes a list of flow requests from the database.