GsaConfigParser parser = new GsaConfigParser();
        String xmlWithUserAgent = "<?xml version=\"1.0\"?>" + "<eef><config><globalparams>" + "<user_agent>custom-agent</user_agent>"
                + "<start_urls>https://example.com</start_urls>" + "</globalparams></config></eef>";

        parser.parse(new InputSource(new StringReader(xmlWithUserAgent)));

        parser.getWebConfig().ifPresent(config -> {

<?xml version="1.0" encoding="UTF-8" ?>
<eef>
	<config Schema="2.0" EnterpriseVersion="'7.6.50'">
		<collections Count="3">
			<collection Name="fess">
				<bad_urls><![CDATA[
https://fess.codelibs.org/images/
              ]]></bad_urls>
				<good_urls><![CDATA[
https://fess.codelibs.org/
https://www.codelibs.org/
              ]]></good_urls>
				<prerequisite_results><![CDATA[
20
              ]]></prerequisite_results>

        if (logger.isDebugEnabled()) {
            logger.debug("Start element: name={}", qName);
        }
        if (tagQueue.isEmpty() && !"eef".equalsIgnoreCase(qName)) {
            throw new GsaConfigException("Invalid GSA configuration format. Root element must be 'eef', but found: " + qName);
        }
        if (COLLECTION.equalsIgnoreCase(qName) && COLLECTIONS.equalsIgnoreCase(tagQueue.peekLast())) {