code: def ReadAllFlowRequestsAndResponses(self, client_id, flow_id):
      
      flow_key = (client_id, flow_id)
      try:
        self.flows[flow_key]
      except KeyError:
        return []
  
      request_dict = self.flow_requests.get(flow_key, {})
      response_dict = self.flow_responses.get(flow_key, {})
  
      res = []
      for request_id in sorted(request_dict):
        res.append((request_dict[request_id], response_dict.get(request_id, {})))
  
      return res
docs: Reads all requests and responses for a given flow from the database.