docs: def call_html_collect_pages(cls, kb_app, sphinx_app: Sphinx):
          """ On html-collect-pages, do callbacks"""
  
          EventAction.get_callbacks(kb_app,
                                    SphinxEvent.HCP)
          for callback in EventAction.get_callbacks(kb_app,
                                                    SphinxEvent.HCP):
              yield callback(kb_app, sphinx_app)