docstr: Get the action space of the environment (or of each of the agents wrapped in this environment.
  i.e. in the LevelManager case")
  :return: the action space
code: def action_space(self) -> Union[Dict[str, ActionSpace], ActionSpace]:
      """
      Get the action space of the environment (or of each of the agents wrapped in this environment.
      i.e. in the LevelManager case")
      :return: the action space
      """
      raise NotImplementedError("")
  
file_path: coach/rl_coach/environments/environment_interface.py
imports: from typing import Union, Dict
  from rl_coach.core_types import ActionType, EnvResponse, RunPhase
  from rl_coach.spaces import ActionSpace
label_desc: Use image node_id 4 for calling the EnvironmentInterface obj's underlying member method code with example usage: obj.action_space() without return types