anchor.diff:  }
   
   class _ResponseOutputStream implements OutputStream {
  -  final _Request _request;
  +  final _request;
     _ResponseOutputStream(this._request);
   
     bool writeString(String string, [Encoding encoding = Encoding.UTF_8]) {
  
positive.code: }
  
  class _Response {
    final Request _request;
    OutputStream _outputStream;
    String _reasonPhrase;
    _Headers _headers;
    _Response(this._request) {
      _outputStream = new _ResponseOutputStream(_request);
      _reasonPhrase = null;
    }
  
    get outputStream() => _outputStream;
    get headers() {
  
negative.code: }
  
  class _Headers extends HeadersNative implements HttpHeaders {
    final _request;
    _Headers(this._request);
  
    List<String> operator [](String name) {
  