code: public static boolean isFallback(final QName qname)
      {
          return FALLBACK_QNAME.getLocalPart().equals(qname.getLocalPart()) &&
                 (Strings.isNullOrEmpty(qname.getNamespaceURI()) ||
                 FALLBACK_QNAME.getNamespaceURI().equals(qname.getNamespaceURI()));
      }
docs: Return if element is a Fallback elementor not
  
  @param qname of the element to test
  @return true if element is a fallback element, false otherwise