code: def test_init_from_datastore(self):
      self.dataset_batches.init_from_storage_write_to_datastore(
          batch_size=3
      )
      self.dataset_batches = image_batches.DatasetBatches(
          datastore_client=self.datastore_client,
          storage_client=self.storage_client,
          dataset_name="dev",
      )
      self.dataset_batches.init_from_datastore()
      self.verify_dataset_batches()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import itertools
  import unittest
  from six import assertCountEqual
  from eval_lib import image_batches
  from eval_lib import submissions
  from eval_lib.tests import fake_cloud_client
label_desc: Use image node_id 5 for calling the DatasetBatchesTest obj's underlying member method code with example usage: obj.test_init_from_datastore() without return types