code: def dummy_iterator(batch_size, data_shape):
      return DummyIter(batch_size, data_shape), DummyIter(
          batch_size, data_shape
      )
  
imports: import os
  import random
  import tarfile
  import logging
  import tarfile
  import mxnet
  from mxnet.test_utils import get_cifar10
  from mxnet.gluon.data.vision import ImageFolderDataset
  from mxnet.gluon.data import DataLoader
  from mxnet.contrib.io import DataLoaderIter
label_desc: Use image node_id 6 for calling a global function with example usage: dummy_iterator(batch_size, data_shape) and returns: DummyIter,  DummyIter