docs: public void debug(String format, Object arg) {
          if (!logger.isDebugEnabled())
              return;
  
          if (instanceofLAL) {
              String formattedMessage = MessageFormatter.format(format, arg).getMessage();
              ((LocationAwareLogger) logger).log(null, fqcn, LocationAwareLogger.DEBUG_INT, formattedMessage, new Object[] { arg }, null);
          } else {
              logger.debug(format, arg);
          }
      }