anchor.diff:  
       group("with chunked conversion", () {
         List<List<int>> results;
  -      ByteConversionSink<List<int>> sink;
  +      ByteConversionSink sink;
         setUp(() {
           results = [];
           var controller = new StreamController<List<int>>(sync: true);
  
positive.code:           sink.add([$a]);
            expect(results, isEmpty);
  
            var data = new Iterable.generate(0xA7).toList();
            sink.add([$7, $cr, $lf]..addAll(data));
            expect(results, equals([data]));
          });
  
negative.code:     });
  
      test("uses hex for chunk size", () {
        var data = new Iterable<int>.generate(0xA7).toList();
        expect(chunkedCoding.encode(data),
            equals([$a, $7, $cr, $lf]
              ..addAll(data)
  