code: protected void setupLogging(@Nullable final Level level) {
      // install JUL adapter
      SLF4JBridgeHandler.removeHandlersForRootLogger();
      SLF4JBridgeHandler.install();
  
      // conifgure gossip bootstrap loggers with target factory
      Log.configure(LoggerFactory.getILoggerFactory());
      log.debug("Logging setup; level: {}", level);
    }
docs: Setup logging environment.