return count;
    }

    /**
     * Deletes documents in an index matching a query.
     *
     * @param index        the index name
     * @param queryBuilder the query to match documents for deletion
     * @return the number of documents deleted
     */
    public long deleteByQuery(final String index, final QueryBuilder queryBuilder) {

        final FessConfig fessConfig = ComponentUtil.getFessConfig();