code: private static void debug(String header, String msg) {
  	if (logger.isTraceEnabled()) {
  	    logger.trace(header);
  	    logger.trace(msg);
  	}
      }
docs: A general debug message that prints the header and msg
  when the debug level is smaler than 3
  
  @param header The header to be printed
  @param msg The message to be printed