anchor.diff:    /// if not present.
     final HeaderValue contentTransferEncoding;
   
  -  var _isText = false;
  -
     /// Whether the data is decoded as [String].
  -  bool get isText => _isText;
  +  final bool isText;
   
     /// Whether the data is raw bytes.
  -  bool get isBinary => !_isText;
  +  bool get isBinary => !isText;
   
     /// The values which indicate that no incoding was performed.
     ///
  
positive.code:   /// constraints.html#multipart-form-data).
    static HttpMultipartFormData parse(MimeMultipart multipart,
        {Encoding defaultEncoding = utf8}) {
      ContentType type;
      HeaderValue encoding;
      HeaderValue disposition;
      var remaining = <String, String>{};
      for (var key in multipart.headers.keys) {
        switch (key) {
          case 'content-type':
            type = ContentType.parse(multipart.headers[key]);
            break;
  
          case 'content-transfer-encoding':
  
negative.code:           break;
  
          default:
            break;
        }
      }
  