code: public static void assertXpathValuesNotEqual(String controlXpath,
                                                   String testXpath,
                                                   Document document)
          throws XpathException {
          assertXpathValuesNotEqual(controlXpath, document, testXpath, document);
      }
docs: Assert that the evaluation of two Xpaths in the same document are
  NOT equal
  @param controlXpath
  @param testXpath
  @param document