@Test
    public void test_promiseChaining_returnsSamePromise() throws Exception {
        final Deferred<SuggestResponse> deferred = new Deferred<>();

        Deferred<SuggestResponse>.Promise promise1 = deferred.promise();
        Deferred<SuggestResponse>.Promise promise2 = promise1.then(response -> {});
        Deferred<SuggestResponse>.Promise promise3 = promise2.error(error -> {});

     */
    public Deferred<T>.Promise execute(final Client client) {
        final String error = getValidationError();
        if (!Strings.isNullOrEmpty(error)) {
            throw new IllegalArgumentException(error);
        }

        final Deferred<T> deferred = new Deferred<>();
        try {
            processRequest(client, deferred);
        } catch (final Exception e) {

            if (this.netname != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(this.netname);

            }
            if (this.remark != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(this.remark);

            }
            if (this.path != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(this.path);

            }

     * @return A Promise that will be resolved with the SuggestIndexResponse
     */
    public Deferred<SuggestIndexResponse>.Promise indexFromQueryLog(final ContentIndexingContext ctx, final QueryLogReader queryLogReader,
            final int docPerReq, final long requestInterval) {
        final Deferred<SuggestIndexResponse> deferred = new Deferred<>();
        threadPool.execute(() -> {
            final long start = System.currentTimeMillis();

            if (this.path != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(this.path);

            }
            if (this.comment != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(this.comment);

            }
            if (this.stores != null) {
                _dst = _dst.deferred;
                final int _storess = this.num_stores;

            if (netname != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(netname);

            }
            if (remark != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(remark);

            }
            if (path != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(path);

            }

        nb.index = idx;
        nb.deferred = deferred;
        return nb;
    }

    /**
     * Resets the buffer position to the start.
     */
    public void reset() {
        this.index = start;
        length = 0;
        deferred = this;
    }

    /**
     * Returns the current index position in the buffer.
     *
     * @return the current index
     */

            if (path != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(path);

            }
            if (comment != null) {
                _dst = _dst.deferred;
                _dst.enc_ndr_string(comment);

            }
            if (stores != null) {
                _dst = _dst.deferred;
                final int _storess = num_stores;

                _dst = _dst.deferred;
                this.root_directory.encode(_dst);

            }
            if (this.object_name != null) {
                _dst = _dst.deferred;
                this.object_name.encode(_dst);

            }
            if (this.security_quality_of_service != null) {
                _dst = _dst.deferred;

                    deferred.reject(new SuggesterException("Search failure. Failed shards num:" + searchResponse.getFailedShards()));
                } else {
                    deferred.resolve(createResponse(searchResponse));
                }
            }

            @Override
            public void onFailure(final Exception e) {
                deferred.reject(e);
            }
        });
    }