How to use the awe.element_updater function in awe

:param port: Webserver port.
        :param websocket_port: Websocket port.
        :param width: Set the page content width. (defaults to ``1200px``)
        :param style: Set custom javascript style object.
        :param export_fn: Override default export function.
        :param offline: Offline mode means start/block don't do anything. Useful when exporting directly from python.
        :param serializers: Custom serializers for custom element implementations.
        """
        super(Page, self).__init__(owner=self, element_id='root')
        self._registry = registry.Registry()
        self._register(self)
        self._offline = (offline or os.environ.get('AWE_OFFLINE'))
        self._port = port
        self._title = title
        self._style = self._set_default_style(style, width)
        self._element_updater = element_updater.ElementUpdater()
        self._parser = parser.Parser(
            registry=self._registry
        )
        self._encoder = encoding.Encoder(
            element_cls=view.Element,
            serializers=serializers
        )
        self._message_handler = messages.MessageHandler(
            registry=self._registry,
            dispatch=self._dispatch
        )
        self._custom_component = custom.CustomComponentHandler(
            registry=self._registry,
            encoder=self._encoder
        )
        self._exporter = export.Exporter(