code: def test_return_normalization_wrapper_clone_from():
      """Unit tests"""
  
      def make_env():
          env = GymMazeEnv("CartPole-v0")
          env = ReturnNormalizationRewardWrapper.wrap(
              env, gamma=0.99, epsilon=1e-8
          )
          return env
  
      assert_wrapper_clone_from(
          make_env, assert_member_list=["_return"]
      )
  
file_path: maze/maze/test/core/wrappers/test_return_normalization_reward_wrapper.py
imports: from maze.core.wrappers.maze_gym_env_wrapper import GymMazeEnv
  from maze.core.wrappers.return_normalization_reward_wrapper import ReturnNormalizationRewardWrapper
  from maze.test.shared_test_utils.dummy_env.dummy_core_env import DummyCoreEnvironment
  from maze.test.shared_test_utils.dummy_env.dummy_maze_env import DummyEnvironment
  from maze.test.shared_test_utils.dummy_env.space_interfaces.action_conversion.dict import DictActionConversion
  from maze.test.shared_test_utils.dummy_env.space_interfaces.observation_conversion.dict import ObservationConversion
  from maze.test.shared_test_utils.wrappers import assert_wrapper_clone_from
label_desc: Use image node_id 2 for calling a global function with example usage: test_return_normalization_wrapper_clone_from() and returns: env