docs: def WriteMessageHandlerRequests(self, requests, cursor=None):
      """Writes a list of message handler requests to the database."""
      query = ("INSERT IGNORE INTO message_handler_requests "
               "(handlername, request_id, request) VALUES ")
  
      value_templates = []
      args = []
      for r in requests:
        args.extend([r.handler_name, r.request_id, r.SerializeToString()])
        value_templates.append("(%s, %s, %s)")
  
      query += ",".join(value_templates)
      cursor.execute(query, args)