code: protected void parse(InputStream in) throws Exception {
          DefaultHandler handler = new StateConfigHandler();
          SAXParserFactory saxFactory = SAXParserFactory.newInstance();
          saxFactory.setValidating(true);
          SAXParser parser = saxFactory.newSAXParser();
          parser.parse(in, handler);
      }
docs: <p>Parses the XML configuration into the <code>Node</code>s and places
  into this instances node collection.</p>
  
  @param in the XML input stream to parse.