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