anchor.diff:  
     @override
     Stream<S> transform<S>(StreamTransformer<List<int>, S> streamTransformer) {
  -    return _delegate.transform<S>(streamTransformer);
  +    return _delegate.cast<List<int>>().transform<S>(streamTransformer);
     }
   
     @override
  
positive.code: 
    @override
    Future<Uint8List> singleWhere(bool Function(Uint8List element) test, {List<int> Function() orElse}) {
      return _delegate.singleWhere(test, orElse: orElse);
    }
  
    @override
  
negative.code:     bool Function(Uint8List element) test, {
      List<int> Function() orElse,
    }) {
      return _delegate.lastWhere(test, orElse: () {
        return Uint8List.fromList(orElse());
      });
    }
  
    @override
  