code: def loop(self) -> IOLoop | None:
      loop = self.__loop
      if loop is None:
          # If the loop is not running when this is called, the LoopRunner.loop
          # property will raise a DeprecationWarning
          # However subsequent calls might occur - eg atexit, where a stopped
          # loop is still acceptable - so we cache access to the loop.
          self.__loop = loop = self._loop_runner.loop
      return loop
  
imports: from __future__ import annotations
  import html
  import logging
  import sys
  import warnings
  import weakref
  from contextlib import suppress
  from timeit import default_timer
  from typing import Callable
  from tlz import valmap
  from tornado.ioloop import IOLoop
  import dask
  from dask.utils import key_split
  from distributed.client import default_client, futures_of
  from distributed.core import CommClosedError, clean_exception, coerce_to_address, connect
  from distributed.diagnostics.progress import MultiProgress, Progress, format_time
  from distributed.protocol.pickle import dumps
  from distributed.utils import LoopRunner, is_kernel
label_desc: Use image node_id 2 for calling the TextProgressBar obj's underlying member method code with example usage: obj.loop() and returns: loop