updateConfigListenerMap.put("RelatedQuery", () -> Integer.toString(ComponentUtil.getRelatedQueryHelper().load()));
        updateConfigListenerMap.put("KeyMatch", () -> Integer.toString(ComponentUtil.getKeyMatchHelper().load()));
    }

    /**
     * Parses project properties from the given path.
     *
     * @param propPath The path to the project properties file.

            if (StringUtil.isNotBlank(requiredKeysStr) && StreamUtil.split(requiredKeysStr, ",")
                    .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).anyMatch(name -> {
                        final String[] values = req.getParameterValues(name);
                        if (values == null || values.length == 0 || StringUtil.isEmpty(values[0])) {

					<defaultUsername>${packaging.fess.user}</defaultUsername>
					<defaultGroupname>${packaging.fess.group}</defaultGroupname>
					<!--
					<keyname>${gpg.key}</keyname>
					<keypath>${gpg.keyring}</keypath>
					<keyPassphrase>
						<passphrase>${gpg.passphrase}</passphrase>
					</keyPassphrase>
					-->
					<mappings>
						<!-- app -->
						<mapping>