@Override
    public void startElement(String uri, String localName, String name, Attributes atts)
            throws SAXException {
        for (ContentHandler handler : handlers) {
            handler.startElement(uri, localName, name, atts);
        }
    }
Content handler proxy that forwards the received SAX events to zero or
more underlying content handlers.
tika-core/src/main/java/org/apache/tika/sax/TeeContentHandler.java