}
        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) {

    /** The key of the message: Schedule */
    public static final String LABELS_CRON_EXPRESSION = "{labels.cronExpression}";

    /** The key of the message: Delete documents older than specified days */
    public static final String LABELS_DAY_FOR_CLEANUP = "{labels.dayForCleanup}";

    /** The key of the message: Concurrent Crawling Count */

    public static final String ERRORS_invalid_confirm_password = "{errors.invalid_confirm_password}";

    /** The key of the message: A crawler is running. You cannot delete documents. */
    public static final String ERRORS_cannot_delete_doc_because_of_running = "{errors.cannot_delete_doc_because_of_running}";

    /** The key of the message: Failed to delete a document. */