var builder = new BulkRequest.Builder().index(index);
    for (T t : list) {
        final var uo = new UpdateOperation.Builder<Map<String, String>, T>().index(index).retryOnConflict(3);
        final var id = documentId.documentId(t);
        if (id != null) {
            uo.id(id);
        }

        // Using script
        final var ac = UpdateAction.<Map<String, String>, T>of(a -> a.scriptedUpsert(true)
                .upsert(emptyMap())
                .script(Script.of(s -> s.stored(ss -> ss.id(scriptId)
                        .params("version", JsonData.of(System.currentTimeMillis()))
                        .params("data", JsonData.of(t))))));
        UpdateOperation<Map<String, String>, T> up = uo.action(ac).build();
        builder.operations(new BulkOperation.Builder().update(up).build());
    }

    BulkRequest request = builder.build();