@Override
    protected void log(String configKey, String format, Object... args) {
      if (logger.isLoggable(java.util.logging.Level.FINE)) {
        logger.fine(String.format(methodTag(configKey) + format, args));
      }
    }
Constructor for JavaLogger class

@param clazz the returned logger will be named after clazz
core/src/main/java/feign/Logger.java