* @return the number of documents that were deleted
     */
    public long deleteDocumentByQuery(final SearchEngineClient searchEngineClient, final QueryBuilder queryBuilder) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return deleteDocumentByQuery(searchEngineClient, fessConfig.getIndexDocumentUpdateIndex(), queryBuilder);
    }

    /**

                final IndexingHelper indexingHelper = ComponentUtil.getIndexingHelper();
                final long count = indexingHelper.deleteDocumentByQuery(searchEngineClient,
                        QueryBuilders.prefixQuery(fessConfig.getIndexFieldUrl(), url));
                if (logger.isDebugEnabled()) {