@Override
    public java.util.concurrent.Future<UpdateDocumentVersionResult> updateDocumentVersionAsync(UpdateDocumentVersionRequest request) {

        return updateDocumentVersionAsync(request, null);
    }
Abstract implementation of {@code AmazonWorkDocsAsync}. Convenient method forms pass through to the corresponding
overload that takes a request object and an {@code AsyncHandler}, which throws an
{@code UnsupportedOperationException}.
aws-java-sdk-workdocs/src/main/java/com/amazonaws/services/workdocs/AbstractAmazonWorkDocsAsync.java