code: def __call__(self, param):
      if param.num_update % self.save_interval == 0:
          self.memory_bank.save()
  
imports: import logging
  import os
  import sys
  import time
  import horovod.mxnet
  import mxnet
  from mxboard import SummaryWriter
  from mxnet import nd
  from default import config
  from evaluation import verification
label_desc: Use image node_id 2 for calling the CallBackCenterSave obj's underlying member method code with example usage: obj.__call__(param) without return types