anchor.diff:        return _encoded;
       _encoded = Uint8List(size);
       ByteData view = _encoded.buffer.asByteData();
  -    view.setUint64(0, timestamp.microsecondsSinceEpoch);
  +    view.setUint64(0, timestamp.millisecondsSinceEpoch);
       _encoded.setRange(8, 8 + data.length, data);
       view.setUint64(8 + data.length, checksum);
       return _encoded;
  
positive.code:   @override
    String toString() {
      StringBuffer buffer = StringBuffer();
      for (int index = 0; index < data.length; index += 1) {
        if (index > 0 && index % 8 == 0)
          buffer.write(' ');
        if (index > 0)
          buffer.write(' ');
        buffer.write(data[index].toRadixString(16).padLeft(2, "0"));
      }
      return buffer.toString();
    }
  }
  
negative.code:   final Uint8List data;
  
    int get checksum {
      int hash = timestamp.millisecondsSinceEpoch;
      hash ^= hash >> 32;
      hash &= 0xffffffff;
      for (int byte in data) {
  