How to use the parsel.csstranslator.TranslatorMixin function in parsel

% function.arguments)
        return XPathExpr.from_xpath(xpath,
                                    attribute=function.arguments[0].value)

    def xpath_text_simple_pseudo_element(self, xpath):
        """Support selecting text nodes using ::text pseudo-element"""
        return XPathExpr.from_xpath(xpath, textnode=True)


class GenericTranslator(TranslatorMixin, OriginalGenericTranslator):
    @lru_cache(maxsize=256)
    def css_to_xpath(self, css, prefix='descendant-or-self::'):
        return super(GenericTranslator, self).css_to_xpath(css, prefix)


class HTMLTranslator(TranslatorMixin, OriginalHTMLTranslator):
    @lru_cache(maxsize=256)
    def css_to_xpath(self, css, prefix='descendant-or-self::'):
        return super(HTMLTranslator, self).css_to_xpath(css, prefix)


_translator = HTMLTranslator()


def css2xpath(query):
    "Return translated XPath version of a given CSS query"
    return _translator.css_to_xpath(query)

def xpath_attr_functional_pseudo_element(self, xpath, function):
        """Support selecting attribute values using ::attr() pseudo-element
        """
        if function.argument_types() not in (['STRING'], ['IDENT']):
            raise ExpressionError(
                "Expected a single string or ident for ::attr(), got %r"
                % function.arguments)
        return XPathExpr.from_xpath(xpath,
                                    attribute=function.arguments[0].value)

    def xpath_text_simple_pseudo_element(self, xpath):
        """Support selecting text nodes using ::text pseudo-element"""
        return XPathExpr.from_xpath(xpath, textnode=True)


class GenericTranslator(TranslatorMixin, OriginalGenericTranslator):
    @lru_cache(maxsize=256)
    def css_to_xpath(self, css, prefix='descendant-or-self::'):
        return super(GenericTranslator, self).css_to_xpath(css, prefix)


class HTMLTranslator(TranslatorMixin, OriginalHTMLTranslator):
    @lru_cache(maxsize=256)
    def css_to_xpath(self, css, prefix='descendant-or-self::'):
        return super(HTMLTranslator, self).css_to_xpath(css, prefix)


_translator = HTMLTranslator()


def css2xpath(query):
    "Return translated XPath version of a given CSS query"

def xpath_element(self, selector):
        xpath = super(TranslatorMixin, self).xpath_element(selector)
        return XPathExpr.from_xpath(xpath)