code: def next_episode_results(self):
      for i in range(self._num_returned, len(self._episode_rewards)):
          yield (self._episode_rewards[i], self._episode_lengths[i])
      self._num_returned = len(self._episode_rewards)
  
imports: from collections import deque
  import gymnasium
  from gymnasium import spaces
  import numpy
  from typing import Union
  from ray.rllib.utils.annotations import PublicAPI
  from ray.rllib.utils.images import rgb2gray, resize
label_desc: Use image node_id 7 for calling the MonitorEnv obj's underlying member method code with example usage: obj.next_episode_results() without return types