code: def test(self, verify_fn):
      dataset = dataset_ops.Dataset.range(42)
      self.evaluate(dataset.save(self._save_dir))
      verify_fn(self, self._build_ds, num_outputs=42)
  
imports: import os
  import shutil
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.data.kernel_tests import checkpoint_test_base
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import combinations
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the LoadCheckpointTest obj's underlying member method code with example usage: obj.test(verify_fn) without return types