@Override
    public LoggerRt getInstance(String category) {
      final Logger logger = Logger.getLogger(category);
      return new LoggerRt() {
        @Override
        public void info(@Nullable String message, @Nullable Throwable t) {
          logger.log(Level.INFO, message, t);
        }

        @Override
        public void warn(@Nullable String message, @Nullable Throwable t) {
          logger.log(Level.WARNING, message, t);
        }

        @Override
        public void error(@Nullable String message, @Nullable Throwable t) {
          logger.log(Level.SEVERE, message, t);
        }
      };
    }
@Override
    public LoggerRt getInstance(String category)