class_docstr: Coin Game environment.
code: def _validate_config(self, config):
      if "players_ids" in config:
          assert isinstance(config["players_ids"], Iterable)
          assert len(config["players_ids"]) == self.NUM_AGENTS
  
imports: import copy
  import gymnasium
  import logging
  import numpy
  from gymnasium.spaces import Discrete
  from gymnasium.utils import seeding
  from ray.rllib.env.multi_agent_env import MultiAgentEnv
  from ray.rllib.utils import override
  from typing import Dict, Optional
  from ray.rllib.examples.env.utils.interfaces import InfoAccumulationInterface
label_desc: Use image node_id 2 for calling the CoinGame obj's underlying member method code with example usage: obj._validate_config(config) without return types