code: def setup(app):
      app.add_config_value("googleanalytics_id", "", "html")
      app.add_config_value("googleanalytics_enabled", True, "html")
      app.connect("html-page-context", add_ga_javascript)
      app.connect("builder-inited", check_config)
      return {"version": "0.1"}
  
imports: from sphinx.errors import ExtensionError
label_desc: Use image node_id 3 for calling a global function with example usage: setup(app) and returns: dict