code: def step(self, action_dict):
      obss, rews, terminateds, truncateds, infos = self.par_env.step(
          action_dict
      )
      terminateds["__all__"] = all(terminateds.values())
      truncateds["__all__"] = all(truncateds.values())
      return obss, rews, terminateds, truncateds, infos
  
imports: from typing import Optional
  import gymnasium
  from ray.rllib.env.multi_agent_env import MultiAgentEnv
  from ray.rllib.utils.annotations import PublicAPI
  from ray.rllib.utils.typing import MultiAgentDict
label_desc: Use image node_id 3 for calling the ParallelPettingZooEnv obj's underlying member method code with example usage: obj.step(action_dict) and returns: obss,  rews,  terminateds,  truncateds,  infos