code: public static void setLogLevel(Level level) {
          // all other ubench loggers inherit from here.
          LOGGER.finer("Changing logging from " + LOGGER.getLevel());
          LOGGER.setLevel(level);
          if (!LOGGER.getUseParentHandlers()) {
              LOGGER.setLevel(level);
              Stream.of(LOGGER.getHandlers()).forEach(h -> h.setLevel(level));
          }
          LOGGER.finer("Changed logging to " + LOGGER.getLevel());
      }
docs: Enable the specified debug level messages to be output. Note that both
  this Logger and whatever Handler you use, have to be set to enable the
  required log level for the handler to output the messages. If this UBench
  code is logging 'stand alone' then this method will also change the
  output level of the log handlers.
  
  @param level The log level to activate for future log levels.