Futures.addCallback(read, new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
@Override
- public void onSuccess(final Optional<NormalizedNode<?, ?>> result) {
+ public void onSuccess(@Nonnull final Optional<NormalizedNode<?, ?>> result) {
if (!result.isPresent()) {
sender.tell(new EmptyReadResponse(), self);
return;