.filter(req -> req != null)
                                .toArray(n -> new UpdateRequest[n]);
                if (updateRequests.length > 0) {
                    searchHelper.bulkUpdate(builder -> {
                        for (final UpdateRequest req : updateRequests) {
                            builder.add(req);
                        }
                    });
                }

        return client.prepareIndex();
    }

    @Override
    public ActionFuture<UpdateResponse> update(final UpdateRequest request) {
        return client.update(request);
    }

    @Override
    public void update(final UpdateRequest request, final ActionListener<UpdateResponse> listener) {
        client.update(request, listener);
    }

    @Override

    public ActionFuture<UpdateResponse> update(final UpdateRequest request) {
        return client.update(request);
    }

    /**
     * Updates a document asynchronously with a callback.
     *
     * @param request  the update request
     * @param listener the response listener
     */
    @Override
    public void update(final UpdateRequest request, final ActionListener<UpdateResponse> listener) {