docs: private static void updateSniffingLoggersLevel(Logger logger) {
  
  		InputStream settingIS = FoundationLogger.class
  				.getResourceAsStream("/sniffingLogger.xml");
  		if (settingIS == null) {
  			logger.debug("file sniffingLogger.xml not found in classpath");
  		} else {
  			try {
  				SAXBuilder builder = new SAXBuilder();
  				Document document = builder.build(settingIS);
  				settingIS.close();
  				Element rootElement = document.getRootElement();
  				List<Element> sniffingloggers = rootElement
  						.getChildren("sniffingLogger");
  				for (Element sniffinglogger : sniffingloggers) {
  					String loggerName = sniffinglogger.getAttributeValue("id");
  					Logger.getLogger(loggerName).setLevel(Level.TRACE);
  				}
  			} catch (Exception e) {
  				logger.error(
  						"cannot load the sniffing logger configuration file. error is: "
  								+ e, e);
  				throw new IllegalArgumentException(
  						"Problem parsing sniffingLogger.xml", e);
  			}
  		}
  
  	}