if (childUrlSet != null) {
            // add an url
            try {
                storeChildUrls(childUrlSet.stream().filter(rd -> StringUtil.isNotBlank(rd.getUrl())).collect(Collectors.toSet()),
                        urlQueue.getUrl(), urlQueue.getDepth() != null ? urlQueue.getDepth() + 1 : 1);
            } catch (final Throwable t) {

import org.codelibs.fess.es.config.cbean.cq.ElevateWordToLabelCQ;
import org.codelibs.fess.es.config.cbean.cq.bs.BsElevateWordToLabelCQ;
import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.missing.MissingAggregationBuilder;

        }
        return stream(values).get(stream -> stream.allMatch(StringUtil::isBlank));
    }

    protected static String[] simplifyArray(final String[] values) {
        return stream(values).get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
    }

    public static String[] getParamValueArray(final HttpServletRequest request, final String param) {

            while ((entry = zis.getNextEntry()) != null) {
                if (!entry.isDirectory()) {
                    final String[] names = StreamUtil.split(entry.getName(), "/")
                            .get(stream -> stream.filter(s -> !"..".equals(s)).toArray(n -> new String[n]));
                    if (names.length < 2) {
                        continue;
                    }
                    if (logger.isDebugEnabled()) {

            authScheme = new DigestScheme();
        } else if (Constants.NTLM.equals(scheme)) {
            final Properties props = new Properties();
            paramMap.entrySet().stream().filter(e -> e.getKey().startsWith("jcifs.")).forEach(e -> {
                props.setProperty(e.getKey(), e.getValue());
            });
            authScheme = new NTLMScheme(new JcifsEngine(props));

            }
            if (getLogger().isDebugEnabled()) {
                getLogger().debug("ExtractData: {}", extractData);
            }
            // meta
            extractData.getKeySet().stream().filter(k -> extractData.getValues(k) != null).forEach(key -> {
                final String[] values = extractData.getValues(key);
                metaDataMap.put(key, values);

                // meta -> content

import org.codelibs.fess.es.config.cbean.ca.ThumbnailQueueCA;
import org.codelibs.fess.es.config.cbean.cq.ThumbnailQueueCQ;
import org.codelibs.fess.es.config.cbean.cq.bs.BsThumbnailQueueCQ;
import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.histogram.HistogramAggregationBuilder;

    }

    public void filtered(FilteredCall<RelatedContentCQ, RelatedContentCQ> filteredLambda, ConditionOptionCall<BoolQueryBuilder> opLambda) {
        bool((must, should, mustNot, filter) -> {
            filteredLambda.callback(must, filter);
        }, opLambda);
    }

    public void not(OperatorCall<RelatedContentCQ> notLambda) {
        not(notLambda, null);
    }

import org.codelibs.fess.es.config.cbean.cq.BoostDocumentRuleCQ;
import org.codelibs.fess.es.config.cbean.cq.bs.BsBoostDocumentRuleCQ;
import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.histogram.HistogramAggregationBuilder;

        }
        if (list.size() >= 2) {
            String msg = "The size of selected list is over 1: " + list.size();
            throw new FetchingOverSafetySizeException(msg, 1); // immediately caught by caller and translated
        }
        return list.get(0);
    }

    @Override
    protected <RESULT extends ENTITY> List<RESULT> delegateSelectList(final ConditionBean cb, final Class<? extends RESULT> entityType) {