}

    public SuggestDeleteResponse deleteByQuery(final String queryString) {
        return deleteByQuery(QueryBuilders.queryStringQuery(queryString).defaultOperator(Operator.AND));
    }

    public SuggestDeleteResponse deleteByQuery(final QueryBuilder queryBuilder) {
        final long start = System.currentTimeMillis();
        final SuggestWriterResult result = suggestWriter.deleteByQuery(client, settings, index, queryBuilder);

        }
        return result;
    }

    @Override
    public SuggestWriterResult deleteByQuery(final Client client, final SuggestSettings settings, final String index,
            final QueryBuilder queryBuilder) {
        final SuggestWriterResult result = new SuggestWriterResult();
        try {
            SuggestUtil.deleteByQuery(client, settings, index, queryBuilder);
        } catch (final Exception e) {

        throw new UnsupportedOperationException("not yet.");
    }

    @Override
    public SuggestWriterResult deleteByQuery(final Client client, final SuggestSettings settings, final String index,
            final QueryBuilder queryBuilder) {
        throw new UnsupportedOperationException("deleteByQuery is unsupported.");
    }

                return oldDocList;
            }

            @Override
            public long deleteByQuery(final String index, final QueryBuilder queryBuilder) {
                if (queryBuilder instanceof final TermsQueryBuilder termsQueryBuilder) {

        // clean up
        final QueryBuilder queryBuilder = QueryBuilders.rangeQuery(fessConfig.getIndexFieldExpires()).to("now");
        try {
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), queryBuilder);

        } catch (final Exception e) {
            logger.error("Could not delete expired documents: {}", queryBuilder, e);

        boolQueryBuilder.mustNot(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.USER.toString()));

        SuggestUtil.deleteByQuery(ComponentUtil.getSearchEngineClient(), suggester.settings(), suggester.getIndex(), boolQueryBuilder);
    }

    public void purgeSearchlogSuggest(final LocalDateTime time) {

    SuggestWriterResult delete(Client client, SuggestSettings settings, String index, String id);

    SuggestWriterResult deleteByQuery(Client client, SuggestSettings settings, String index, QueryBuilder queryBuilder);

    default SuggestItem[] mergeItems(final SuggestItem[] items) {
        final Set<String> mergedIdSet = new HashSet<>();

    }

    protected long deleteDocumentByQuery(final SearchEngineClient searchEngineClient, final String index, final QueryBuilder queryBuilder) {
        return searchEngineClient.deleteByQuery(index, queryBuilder);
    }

    public Map<String, Object> getDocument(final SearchEngineClient searchEngineClient, final String id, final String[] fields) {

    public JsonResponse<ApiResult> delete$doc(final String id) {
        try {
            final QueryBuilder query = QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), id);
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), query);
            saveInfo(messages -> messages.addSuccessDeleteDocFromIndex(GLOBAL));
        } catch (final Exception e) {

        final String docId = form.docId;
        try {
            final QueryBuilder query = QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), docId);
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), query);
            saveInfo(messages -> messages.addSuccessDeleteDocFromIndex(GLOBAL));
        } catch (final Exception e) {