client.explain(request, listener);
    }

    @Override
    public ClearScrollRequestBuilder prepareClearScroll() {
        return client.prepareClearScroll();
    }

    @Override
    public ActionFuture<ClearScrollResponse> clearScroll(final ClearScrollRequest request) {
        return client.clearScroll(request);
    }

     */
    public static void deleteScrollContext(final Client client, final String scrollId) {
        if (scrollId != null) {
            client.prepareClearScroll().addScrollId(scrollId).execute(ActionListener.wrap(res -> {}, e -> {}));
        }
    }

    /**
     * Escapes wildcard characters in the given query string.
     *