code: def tunnel_mod(self):
      from zmq.ssh import tunnel
  
      return tunnel
  
imports: import json
  import os
  import signal
  import sys
  import time
  from getpass import getpass
  from io import FileIO, TextIOWrapper
  from logging import StreamHandler
  import zmq
  from ipykernel.kernelapp import IPKernelApp
  from ipykernel.zmqshell import ZMQInteractiveShell
  from IPython.core.profiledir import ProfileDir
  from jupyter_client.localinterfaces import localhost
  from jupyter_client.session import Session, session_aliases, session_flags
  from tornado import ioloop
  from traitlets import Bool, Bytes, Dict, Float, Instance, Integer, List, Type, Unicode, default, observe, validate
  from traitlets.config import Config
  from zmq.eventloop import zmqstream
  from ipyparallel.apps.baseapp import BaseParallelApplication, base_aliases, base_flags, catch_config_error
  from ipyparallel.controller.heartmonitor import Heart
  from ipyparallel.util import disambiguate_ip_address, disambiguate_url
  from .kernel import IPythonParallelKernel
  from .log import EnginePUBHandler
  from .nanny import start_nanny
label_desc: Use image node_id 16 for calling the IPEngine obj's underlying member method code with example usage: obj.tunnel_mod() and returns: tunnel