code: def do_labels_update(self, info, labels):
          
          if self.update_label_func:
              self.update_label_func(self.label_name, info, labels)
docs: Updates a dictionary of labels using the assigned update_op_func
  
          Args:
             info (:class:`endpoints_management.control.report_request.Info`): the
                info instance to update
             labels (dict[string[string]]): the labels dictionary
  
          Return:
             `True` if desc is supported, otherwise `False`