class_docstr: Monitor and autorestart a kernel.
docstr: Stop the kernel polling.
code: def stop(self):
      """Stop the kernel polling."""
      if self._pcallback is not None:
          self._pcallback.stop()
          self._pcallback = None
  
file_path: catboost/contrib/python/jupyter-client/py2/jupyter_client/ioloop/restarter.py
imports: from __future__ import absolute_import
  import warnings
  from zmq.eventloop import ioloop
  from jupyter_client.restarter import KernelRestarter
  from traitlets import Instance
label_desc: Use image node_id 3 for calling the IOLoopKernelRestarter obj's underlying member method code with example usage: obj.stop() without return types