code: def _default_session(self):
      return jupyter_client.session.Session(parent=self)
  
imports: import logging
  import jupyter_client.session
  import traitlets.log
  import zmq
  from decorator import decorator
  from tornado import ioloop
  from traitlets import Bytes, Instance, Set, default
  from traitlets.config import Config, LoggingConfigurable
  from zmq.eventloop import zmqstream
  from ipyparallel import util
  from ipyparallel.util import connect_logger, local_logger
label_desc: Use image node_id 2 for calling the Scheduler obj's underlying member method code with example usage: obj._default_session() and returns: jupyter_client