code: def testBuild(self):
      policy = qtopt_cem_policy.CEMPolicy(
          self._time_step_spec,
          self._action_spec,
          sampler=None,
          init_mean=None,
          init_var=None,
          q_network=DummyNet((self._obs_spec, self._action_spec)),
      )
  
      self.assertEqual(policy.time_step_spec, self._time_step_spec)
      self.assertEqual(policy.action_spec, self._action_spec)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl import flags
  from absl import logging
  from absl.testing import parameterized
  import numpy
  import tensorflow
  import tensorflow_probability
  from tf_agents.networks import network
  from tf_agents.policies import qtopt_cem_policy
  from tf_agents.policies.samplers import qtopt_cem_actions_sampler_continuous
  from tf_agents.policies.samplers import qtopt_cem_actions_sampler_continuous_and_one_hot
  from tf_agents.policies.samplers import qtopt_cem_actions_sampler_hybrid
  from tf_agents.specs import tensor_spec
  from tf_agents.trajectories import time_step
label_desc: Use image node_id 2 for calling the CEMPolicyTest obj's underlying member method code with example usage: obj.testBuild() without return types