code: @Override
    public <T> Completes<Optional<T>> maybeActorOf(Class<T> protocol, Address address) {
      final T typed = internalActorOf(protocol, address);
      final Optional<T> maybe = typed == null ? Optional.empty() : Optional.of(typed);
      return completes().with(maybe);
    }
docs: /*
  @see io.vlingo.actors.DirectoryScanner#maybeActorOf(java.lang.Class, io.vlingo.actors.Address)