code: def setup(app):
      app.add_object_type(
          "confval",
          "confval",
          objname="configuration value",
          indextemplate="pair: %s; configuration value",
      )
      app.add_js_file(
          None,
          body=f"const BOKEH_CURRENT_VERSION = {version!r};",
          priority=100,
      )
      app.add_js_file("custom.js")
  
imports: import os
  from datetime import date
  from sphinx.util import logging
  from bokeh import __version__
  from bokeh.settings import settings
label_desc: Use image node_id 1 for calling a global function with example usage: setup(app) without return types