public boolean update(final String index, final String id, final String field, final Object value) {
        // Using ingest pipelines with doc_as_upsert is not supported.
        if (usePipeline) {
            return updateByIdWithScript(index, id, field, value);
        }
        try {
            final Result result = client.prepareUpdate()
                    .setIndex(index)
                    .setId(id)