class_docstr: Explicitly coordinate the level Tornado components required to run a
  Bokeh server:
  
  * A Tornado ``IOLoop`` to run the Bokeh server machinery.
  
  * a ``BokehTornado`` Tornado application that defines the Bokeh server
    machinery.
  
  * a Tornado ``HTTPServer`` to direct HTTP requests
  
  All three of these components must be passed to ``BaseServer``, which will
  initialize the ``BokehTornado`` instance on the ``io_loop``. The
  ``http_server`` must have been previously created and initialized with the
  ``BokehTornado`` instance.
docstr: Stop listening on ports. The server will no longer be usable after
  calling this function.
  
  .. note::
      This function is mostly useful for tests
  
  Returns:
      None
docstr_tok: ["Stop","listening","on","ports",".","The","server","will","no","longer","be","usable","after","calling","this","function",".","..","note",":",":","This","function","is","mostly","useful","for","tests","Returns",":","None"]
code: def unlisten(self) -> None:
      """Stop listening on ports. The server will no longer be usable after
      calling this function.
  
      .. note::
          This function is mostly useful for tests
  
      Returns:
          None
  
      """
      self._http.stop()
      self.io_loop.add_callback(self._http.close_all_connections)
  
imports: from __future__ import annotations
  import logging
  import atexit
  import signal
  import socket
  import sys
  from types import FrameType
  from typing import TYPE_CHECKING, Any, Mapping
  from tornado import netutil, version
  from tornado.httpserver import HTTPServer
  from tornado.ioloop import IOLoop
  from ..None import __version__
  from ..core import properties
  from ..core.properties import Bool, Int, Nullable, String
  from ..resources import DEFAULT_SERVER_PORT, server_url
  from ..util.options import Options
  from .tornado import DEFAULT_WEBSOCKET_MAX_MESSAGE_SIZE_BYTES, BokehTornado
  from .util import bind_sockets, create_hosts_allowlist
label_desc: Use image node_id 5 for calling the BaseServer obj's underlying member method code with example usage: obj.unlisten() without return types