code: @WriteOperation
      public void updateLoggerLevel(@Selector final String loggerName,
                                    final String loggerLevel,
                                    final boolean additive) {
  
  
          val loggerConfigs = getLoggerConfigurations();
          loggerConfigs.stream()
              .filter(cfg -> cfg.getName().equals(loggerName))
              .forEachOrdered(cfg -> {
                  cfg.setLevel(Level.getLevel(loggerLevel));
                  cfg.setAdditive(additive);
              });
          this.loggerContext.updateLoggers();
      }
docs: Looks up the logger in the logger factory,
  and attempts to find the real logger instance
  based on the underlying logging framework
  and retrieve the logger object. Then, updates the level.
  This functionality at this point is heavily dependant
  on the log4j API.
  
  @param loggerName  the logger name
  @param loggerLevel the logger level
  @param additive    the additive nature of the logger