docs: static Logger createLogger(Namespace namespace) {
      String logConfig = namespace.getString("log_config");
      if (logConfig != null) {
        System.setProperty("logback.configurationFile", logConfig);
      }
      System.setProperty("atomix.log.directory", namespace.getString("log_dir"));
      System.setProperty("atomix.log.level", namespace.getString("log_level"));
      System.setProperty("atomix.log.console.level", namespace.getString("console_log_level"));
      System.setProperty("atomix.log.file.level", namespace.getString("file_log_level"));
      return LoggerFactory.getLogger(AtomixAgent.class);
    }