code: def test_cases():
      return parameterized.named_parameters(
          {
              "testcase_name": "SimpleNet",
              "network_ctor": DummyActionNet,
          },
          {
              "testcase_name": "DistributionNet",
              "network_ctor": DummyActionDistributionNet,
          },
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  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 network
  from tf_agents.policies import actor_policy
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import time_step
  from tf_agents.utils import test_utils
label_desc: Use image node_id 1 for calling a global function with example usage: test_cases() and returns: parameterized