code: def test_spaces_sample_contain_not_in_preferred_format(self):
      env = make_multi_agent("CartPole-v1")({"num_agents": 2})
      # this environment has spaces that are not in the preferred format
      # for multi-agent environments where the spaces not in the preferred
      # format, users must override the observation_space_contains,
      # action_space_contains observation_space_sample,
      # and action_space_sample methods in order to do proper checks
      obs = env.observation_space_sample()
      assert env.observation_space_contains(
          obs
      ), "Observation space does not contain obs"
      action = env.action_space_sample()
      assert env.action_space_contains(
          action
      ), "Action space does not contain action"
  
imports: import gymnasium
  import numpy
  import random
  import tree
  import unittest
  import ray
  from ray.tune.registry import register_env
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.algorithms.dqn.dqn import DQNConfig
  from ray.rllib.algorithms.dqn.dqn_tf_policy import DQNTFPolicy
  from ray.rllib.algorithms.ppo import PPOConfig
  from ray.rllib.env.multi_agent_env import make_multi_agent, MultiAgentEnvWrapper
  from ray.rllib.evaluation.episode import Episode
  from ray.rllib.evaluation.rollout_worker import get_global_worker, RolloutWorker
  from ray.rllib.evaluation.tests.test_rollout_worker import MockPolicy
  from ray.rllib.examples.policy.random_policy import RandomPolicy
  from ray.rllib.examples.env.multi_agent import MultiAgentCartPole, BasicMultiAgent, EarlyDoneMultiAgent, FlexAgentsMultiAgent, RoundRobinMultiAgent, SometimesZeroAgentsMultiAgent
  from ray.rllib.policy.policy import PolicySpec
  from ray.rllib.policy.sample_batch import convert_ma_batch_to_sample_batch
  from ray.rllib.tests.test_nested_observation_spaces import NestedMultiAgentEnv
  from ray.rllib.utils.numpy import one_hot
  from ray.rllib.utils.test_utils import check
label_desc: Use image node_id 21 for calling the TestMultiAgentEnv obj's underlying member method code with example usage: obj.test_spaces_sample_contain_not_in_preferred_format() without return types