code: def do_operation_update(self, info, an_op):
          
          self.update_op_func(self.metric_name, info, an_op)
docs: Updates an operation using the assigned update_op_func
  
          Args:
             info: (:class:`endpoints_management.control.report_request.Info`): the
                info instance to update
             an_op: (:class:`endpoints_management.control.report_request.Info`):
                the info instance to update
  
          Return:
             `True` if desc is supported, otherwise `False`