code: def test_observation_monitoring():
      """Observation logging unit test"""
      env = GymMazeEnv(env="CartPole-v0")
  
      env = ObservationVisualizationWrapper.wrap(
          env, plot_function=None
      )
      env = LogStatsWrapper.wrap(env, logging_prefix="train")
  
      with SimpleStatsLoggingSetup(env, log_dir="."):
          env.reset()
          done = False
          while not done:
              obs, rew, done, info = env.step(env.action_space.sample())
  
imports: from maze.core.wrappers.log_stats_wrapper import LogStatsWrapper
  from maze.core.wrappers.maze_gym_env_wrapper import GymMazeEnv
  from maze.core.wrappers.observation_visualization_wrapper import ObservationVisualizationWrapper
  from maze.utils.log_stats_utils import SimpleStatsLoggingSetup
label_desc: Use image node_id 1 for calling a global function with example usage: test_observation_monitoring() without return types