code: def on_next_tick(self):
      self.hooks.append("next_tick")
  
imports: from __future__ import annotations
  import pytest
  import asyncio
  import logging
  import re
  import ssl
  import sys
  import time
  from datetime import timedelta
  from unittest import mock
  import tornado
  from _util_server import http_get, url, websocket_open, ws_url
  from tornado.httpclient import HTTPError
  from tornado.httpserver import HTTPServer
  from tornado.ioloop import IOLoop
  from bokeh.application import Application
  from bokeh.application.handlers import Handler
  from bokeh.client import pull_session
  from bokeh.core.properties import List, String
  from bokeh.core.types import ID
  from bokeh.model import Model
  from bokeh.server.server import BaseServer, Server
  from bokeh.server.tornado import BokehTornado
  from bokeh.util.token import check_token_signature, generate_jwt_token, get_session_id, get_token_payload
  from tests.support.plugins.managed_server_loop import MSL
  import bokeh.server.server
label_desc: Use image node_id 5 for calling the HookTestHandler obj's underlying member method code with example usage: obj.on_next_tick() without return types