* @param attrName the attribute name to extract URLs from
     */
    public void addChildUrlRule(final String tagName, final String attrName) {
        if (StringUtil.isNotBlank(tagName) && StringUtil.isNotBlank(attrName)) {
            childUrlRuleMap.put(tagName, attrName);
        }
    }

    /**
     * Gets the XPath API instance for this thread.
     *
     * @return the XPath API instance

                ),
                "-PflakyTests=${determineFlakyTestStrategy(stage)}",
                extraParameters,
                parallelizationMethod.extraBuildParameters,
            ).filter { it.isNotBlank() }.joinToString(separator = " ")

        if (parallelizationMethod is ParallelizationMethod.TeamCityParallelTests) {
            tcParallelTests(parallelizationMethod.numberOfBatches)
        }

                    final Map<String, Object> doc = hit.getSourceAsMap();
                    final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
                    if (StringUtil.isNotBlank(url)) {
                        final Set<String> labelSet = labelTypeHelper.getMatchedLabelValueSet(url);
                        final Script script = languageHelper.createScript(doc, "ctx._source." + fessConfig.getIndexFieldLabel()

            throws IOException, ServletException {
        final HttpServletRequest httpRequest = (HttpServletRequest) request;
        final String origin = httpRequest.getHeader("Origin");
        if (StringUtil.isNotBlank(origin)) {
            if (logger.isDebugEnabled()) {
                logger.debug("HTTP Request: {}", httpRequest.getMethod());
            }

        schedulerTime = systemHelper.getCurrentTimeAsLong();
        scheduledJobService.start(cron);

        final String myName = fessConfig.getSchedulerTargetName();
        if (StringUtil.isNotBlank(myName)) {
            ComponentUtil.getComponent(JobLogBhv.class).queryDelete(cb -> {
                cb.query().setJobStatus_Equal(Constants.RUNNING);
                cb.query().setTarget_Equal(myName);
            });

     *         otherwise an empty OptionalThing
     */
    public OptionalThing<Config> getConfig(final String fieldName) {
        final String value = params.get(fieldName);
        if (StringUtil.isNotBlank(value)) {
            return OptionalThing.of(new Config(value));
        }
        return OptionalThing.empty();
    }

    /**
     * Configuration class that holds parsed configuration values for a field.

            final HttpSession session = request.getSession(false);
            if (session != null) {
                final String sesState = (String) session.getAttribute(OIC_STATE);
                if (StringUtil.isNotBlank(sesState)) {
                    session.removeAttribute(OIC_STATE);
                    final String code = request.getParameter("code");
                    final String reqState = request.getParameter("state");

            }
        }
        if (!targetList.isEmpty()) {
            insertAll(targetList.stream()
                    .filter(urlQueue -> StringUtil.isNotBlank(urlQueue.getSessionId()) && StringUtil.isNotBlank(urlQueue.getUrl()))
                    .collect(Collectors.toList()), OpType.CREATE, true);
            if (logger.isDebugEnabled()) {

                authSchemeProviderBuilder.register(entry.getKey(), entry.getValue());
            }
        }

        // user agent
        if (StringUtil.isNotBlank(userAgent)) {
            httpClientBuilder.setUserAgent(userAgent);
        }

        // Authentication
        final Authentication[] siteCredentialList = {};

                            final String distanceKey = key.replaceFirst(".point$", ".distance");
                            final String distance = request.getParameter(distanceKey);
                            if (StringUtil.isNotBlank(distance)) {
                                StreamUtil.stream(e.getValue()).of(s -> s.forEach(pt -> {
                                    List<QueryBuilder> list = geoMap.get(geoField);