@Override
    public void startPrefixMapping(String prefix, String uri) throws SAXException {
        super.startPrefixMapping(prefix, uri);
        delegate.startPrefixMapping(prefix, uri);
    }
Retrieves the built TextDocument

@return TextDocument
tika-handlers/tika-handler-boilerpipe/src/main/java/org/apache/tika/sax/boilerpipe/BoilerpipeContentHandler.java