final String configId = (String) doc.get(fessConfig.getIndexFieldConfigId());
                            crawlingConfigHelper.getPipeline(configId).ifPresent(s -> builder.setPipeline(s));
                        });
                if (response.hasFailures()) {
                    if (logger.isDebugEnabled()) {

     *
     * @param configId the configuration ID to get the pipeline for
     * @return an OptionalThing containing the pipeline string if found, or empty if not found or blank
     */
    public OptionalThing<String> getPipeline(final String configId) {
        final CrawlingConfig config = getCrawlingConfig(configId);
        if (config == null) {
            return OptionalThing.empty();
        }