class_docstr: An abstract asynchronous, vectorized environment.
  
  :param num_envs: (int) the number of environments
  :param observation_space: (Gym Space) the observation space
  :param action_space: (Gym Space) the action space
docstr: Clean up the environment's resources.
docstr_tok: ["Clean","up","the","environment","'s","resources","."]
code: def close(self):
      """
      Clean up the environment's resources.
      """
      pass
  
imports: from abc import ABC, abstractmethod
  import inspect
  import pickle
  from typing import Sequence, Optional, List, Union
  import cloudpickle
  import numpy
  from stable_baselines import logger
  from stable_baselines.common.tile_images import tile_images
label_desc: Use image node_id 5 for calling the VecEnv obj's underlying member method code with example usage: obj.close() without return types