final Path xmlPath = fs.getPath("fess_ds++.xml");
                try (InputStream is = Files.newInputStream(xmlPath)) {
                    final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
                    factory.setFeature(org.codelibs.fess.crawler.Constants.FEATURE_SECURE_PROCESSING, true);
                    factory.setFeature(org.codelibs.fess.crawler.Constants.FEATURE_EXTERNAL_GENERAL_ENTITIES, false);

    data class FetchedVersions(val latests: List<String>, val nightlyBuildId: String, val nightlyVersion: String)

    private
    fun fetchLatestAgpVersions(): FetchedVersions {
        val dbf = DocumentBuilderFactory.newInstance()
        val latests = dbf.fetchLatests(
            minimumSupportedMinor.get(),
            "https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/maven-metadata.xml"
        )

            updateProperties(latestKotlinVersions)
            updateCompatibilityDoc(latestKotlinVersions)
        }

    private
    fun fetchLatestKotlinVersions() =
        DocumentBuilderFactory.newInstance().fetchFirstAndLatestsOfEachMinor(
            minimumSupported.get(),
            "https://repo1.maven.org/maven2/org/jetbrains/kotlin/kotlin-stdlib/maven-metadata.xml"
        )

    private

        }

        // create handler
        final DocHandler handler = new DocHandler();

        // create a sax instance
        final SAXParserFactory spfactory = SAXParserFactory.newInstance();
        try {
            spfactory.setFeature(Constants.FEATURE_SECURE_PROCESSING, true);
            spfactory.setFeature(Constants.FEATURE_EXTERNAL_GENERAL_ENTITIES, false);

            };
        } else {
            return null;
        }
    }

    private List<Problem> convert(List<BuilderProblem> problems) {
        ProblemCollector collector = ProblemCollectorFactory.newInstance(null);
        problems.forEach(p -> collector.add(
                Problem.Severity.valueOf(p.getSeverity().name()),
                p.getMessage(),
                p.getLineNumber(),

    }

    @Override
    protected <RESULT extends CrawlingInfo> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));
            result.setExpiredTime(DfTypeUtil.toLong(source.get("expiredTime")));

    }

    @Override
    protected <RESULT extends ElevateWordToLabel> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setElevateWordId(DfTypeUtil.toString(source.get("elevateWordId")));
            result.setLabelTypeId(DfTypeUtil.toString(source.get("labelTypeId")));
            return updateEntity(source, result);

    }

    @Override
    protected <RESULT extends JobLog> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setEndTime(DfTypeUtil.toLong(source.get("endTime")));
            result.setJobName(DfTypeUtil.toString(source.get("jobName")));
            result.setJobStatus(DfTypeUtil.toString(source.get("jobStatus")));

    }

    @Override
    protected <RESULT extends RoleType> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));
            result.setName(DfTypeUtil.toString(source.get("name")));

    }

    @Override
    protected <RESULT extends ThumbnailQueue> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));