`lxml <http://lxml.de>`_ representation of the
        :class:`Element <Element>` or :class:`HTML <HTML>`.

def lxml(self) -> HtmlElement:
        """`lxml <http://lxml.de>`_ representation of the
        :class:`Element <Element>` or :class:`HTML <HTML>`.
        """
        if self._lxml is None:
            try:
                self._lxml = soup_parse(self.html, features='html.parser')
            except ValueError:
                self._lxml = lxml.html.fromstring(self.raw_html)

        return self._lxml