docs: public static Level getLoggingLevelFromProperties() {
  		if (levelFromProperties == null) {
  			final String verboseLevel = JanusConfig.getSystemProperty(JanusConfig.VERBOSE_LEVEL_NAME, JanusConfig.VERBOSE_LEVEL_VALUE);
  			levelFromProperties = parseLoggingLevel(verboseLevel);
  		}
  		return levelFromProperties;
  	}