docs: public boolean setLevel(String level) {
          boolean isSucceed = true;
          try {
              LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
              loggerContext.getLogger("root").setLevel(Level.valueOf(level));
          } catch (Exception e) {
              e.printStackTrace();
              isSucceed = false;
          }
          return isSucceed;
      }