code: def _compare_input_output_specs(
      self,
      function,
      expected_input_specs,
      expected_output_spec,
      batch_input,
      batch_size=None,
  ):
      args, kwargs = function.structured_input_signature
      self.assertFalse(args)
  
      def expected_spec(spec, include_batch_dimension):
          if include_batch_dimension:
              return tf.TensorSpec(
                  dtype=spec.dtype,
                  shape=tf.TensorShape([batch_size]).concatenate(
                      spec.shape
                  ),
                  name=spec.name,
              )
          else:
              return spec
  
      expected_input_spec_dict = dict(
          (
              spec.name,
              expected_spec(spec, include_batch_dimension=batch_input),
          )
          for spec in tf.nest.flatten(expected_input_specs)
      )
      expected_output_spec_dict = dict(
          (spec.name, expected_spec(spec, include_batch_dimension=True))
          for spec in tf.nest.flatten(expected_output_spec)
      )
  
      self.assertEqual(kwargs, expected_input_spec_dict)
      self.assertEqual(
          function.structured_outputs, expected_output_spec_dict
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import os
  import shutil
  from absl.testing import parameterized
  import numpy
  import tensorflow
  import tensorflow_probability
  from tf_agents.networks import actor_distribution_network
  from tf_agents.networks import q_network
  from tf_agents.networks import q_rnn_network
  from tf_agents.policies import actor_policy
  from tf_agents.policies import policy_saver
  from tf_agents.policies import q_policy
  from tf_agents.policies import tf_policy
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import policy_step
  from tf_agents.trajectories import time_step
  from tf_agents.utils import common
  from tf_agents.utils import test_utils
label_desc: Use image node_id 21 for calling the PolicySaverTest obj's underlying member method code with example usage: obj._compare_input_output_specs(function, expected_input_specs, expected_output_spec, batch_input, batch_size) and returns: tf, spec