code: def _choose_next_state(self):
      self.state = self.action_space.sample()
  
imports: import numpy
  from typing import Optional
  from gym import Env, Space
  from gym.spaces import Discrete, MultiDiscrete, MultiBinary, Box
label_desc: Use image node_id 4 for calling the IdentityEnv obj's underlying member method code with example usage: obj._choose_next_state() without return types