@Override
    public void endElement(String uri, String localName, String qName)
            throws SAXException {
        if (contentHandler == null) {
            return;
        }
        contentHandler.endElement(uri, localName, qName);
    }
@see org.xml.sax.helpers.XMLFilterImpl#endElement(java.lang.String,
     java.lang.String, java.lang.String)
src/nu/validator/xml/AttributesPermutingXMLReaderWrapper.java