code: def shutdown(self, wait=True):
      pass
  
imports: from __future__ import absolute_import, division, print_function
  import functools
  import platform
  import textwrap
  import traceback
  import sys
  from tornado.log import app_log
  from tornado.stack_context import ExceptionStackContext, wrap
  from tornado.util import raise_exc_info, ArgReplacer, is_finalizing
label_desc: Use image node_id 2 for calling the DummyExecutor obj's underlying member method code with example usage: obj.shutdown(wait) without return types