@Test(expected = UnsupportedOperationException.class)
public void testSuccessUploadsNotModifiableInitial() {

    AttachmentUploadResult<SW360Release> result = new AttachmentUploadResult<>(new SW360Release());
    result.successfulUploads()
            .add(new AttachmentUploadRequest.Item(Paths.get("p"), SW360AttachmentType.SOURCE));
}