code: def __call__(
      self, num_update, backbone: flow.nn.Module, backbone_graph=None
  ):
      if self.is_consistent:
          if num_update > 0 and num_update % self.frequent == 0:
              backbone.eval()
              self.ver_test(backbone_graph, num_update)
              backbone.train()
      else:
          if (
              self.rank is 0
              and num_update > 0
              and num_update % self.frequent == 0
          ):
              backbone.eval()
              self.ver_test(backbone, num_update)
              backbone.train()
  
imports: import logging
  import os
  import time
  from typing import List
  import oneflow
  from eval import verification
  from utils.utils_logging import AverageMeter
label_desc: Use image node_id 4 for calling the CallBackVerification obj's underlying member method code with example usage: obj.__call__(num_update, backbone, backbone_graph) without return types