code: def do_stuff(self) -> str:
      return "d"
  
file_path: maze/maze/test/core/wrappers/dummy_wrappers_for_duplication_test/dummy_wrapper_b.py
imports: from typing import Union
  import gym
  from maze.core.env.base_env import BaseEnv
  from maze.core.wrappers.wrapper import Wrapper
label_desc: Use image node_id 2 for calling the DummyWrapperB obj's underlying member method code with example usage: obj.do_stuff() and returns: str