* @param condition the search condition
     * @param cursor    the cursor function to process each hit
     * @return the number of documents processed
     * @throws InvalidQueryException if the query is invalid
     */
    public long scrollSearch(final String index, final SearchCondition<SearchRequestBuilder> condition,
            final BooleanFunction<Map<String, Object>> cursor) {

 *         .catching(DBException.class, e -> "no user", directExecutor())
 *         .finishToFuture();
 * }
 *
 * In this example, when the {@code userName} {@link Future} is done, the transaction and the query
 * result cursor will both be closed, even if the operation is cancelled or fails.
 *
 * <h4>Manually closing</h4>
 *
 * If you want to close the captured objects manually, after you've used the final result, call