code: def step(
      self, action: ActType
  ) -> Tuple[ObsType, SupportsFloat, bool, bool, Dict[str, Any]]:
      self.t += 1
      if self.t == 200:
          is_terminated = True
      else:
          is_terminated = False
  
      return self.t, self.t, is_terminated, False, {}
  
imports: from collections import defaultdict
  from typing import Any, Dict, Optional, SupportsFloat, Tuple
  import unittest
  import gymnasium
  from gymnasium.core import ActType, ObsType
  import numpy
  from ray.rllib.env.single_agent_episode import SingleAgentEpisode
  from ray.rllib.utils.test_utils import check
label_desc: Use image node_id 3 for calling the TestEnv obj's underlying member method code with example usage: obj.step(action) and returns: self,  self,  is_terminated,  False,  dict