assertXpathsNotEqual(controlXpath, document, testXpath, document);
assertXpathsNotEqual(controlXpath, document, testXpath, document, null);
    public static void assertXpathsNotEqual(String controlXpath, String testXpath,                                            Document document)        throws XpathException {        assertXpathsNotEqual(controlXpath, document, testXpath, document);    }