code: def test_gym_registration(self):
      reg_id, env = gym_utils.register_gym_env(
          "tensor2tensor.rl.gym_utils_test:SimpleEnv"
      )
  
      self.assertEqual("T2TEnv-SimpleEnv-v0", reg_id)
  
      # Most basic check.
      self.assertIsInstance(env, gym.Env)
  
      # Just make sure we got the same environment.
      self.assertTrue(
          np.allclose(
              env.reset(), np.zeros(shape=(3, 3), dtype=np.uint8)
          )
      )
  
      _, _, done, _ = env.step(1)
      self.assertTrue(done)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import unittest
  import gym
  from gym import spaces
  import numpy
  from tensor2tensor.rl import gym_utils
  import tensorflow.compat.v1
label_desc: Use image node_id 11 for calling the GymUtilsTest obj's underlying member method code with example usage: obj.test_gym_registration() without return types