code: def testCompatibility(self):
      model = "transformer"
      hp_set = "transformer_test"
      problem_name = "translate_ende_wmt8k"
  
      hp = trainer_lib.create_hparams(
          hp_set, data_dir=_DATA_DIR, problem_name=problem_name
      )
      run_config = trainer_lib.create_run_config(
          model, model_dir=_CKPT_DIR
      )
      estimator = trainer_lib.create_estimator(model, hp, run_config)
  
      for prediction in estimator.predict(self.input_fn):
          self.assertEqual(prediction["outputs"].dtype, np.int32)
  
file_path: tensor2tensor/tensor2tensor/utils/checkpoint_compatibility_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import numpy
  from six.moves import range
  from tensor2tensor import models
  from tensor2tensor import problems
  from tensor2tensor.utils import data_reader
  from tensor2tensor.utils import trainer_lib
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the CheckpointCompatibilityTest obj's underlying member method code with example usage: obj.testCompatibility() without return types