}

    default void setAppValue(final String value) {
        setSystemProperty(Constants.APP_VALUE_PROPERTY, value);
        propMap.remove(APP_VALUES);
    }

    default String getAppValue() {
        return getSystemProperty(Constants.APP_VALUE_PROPERTY, StringUtil.EMPTY);
    }

    default void setDefaultLabelValue(final String value) {

    }

    /**
     * Updates system properties from the application configuration.
     */
    public void updateSystemProperties() {
        final String value = ComponentUtil.getFessConfig().getAppValue();
        if (logger.isDebugEnabled()) {
            logger.debug("system.properties: {}", value);
        }
        if (StringUtil.isNotBlank(value)) {