code: def test_does_not_modify_action(self):
      env = GridWorldEnv(desc="8x8")
      a = env.action_space.sample()
      a_copy = a
      env.reset()
      env.step(a)
      assert a == a_copy
      env.close()
  
imports: import pickle
  from garage.envs.grid_world_env import GridWorldEnv
  from tests.helpers import step_env
label_desc: Use image node_id 2 for calling the TestGridWorldEnv obj's underlying member method code with example usage: obj.test_does_not_modify_action() without return types