anchor.diff:    int get format => _format;
   
     /**
  -   * Set the format of the image, either [RGB] or [RGBA].
  +   * Set the format of the image, either [RGB] or [RGBA].  The format is used
  +   * for informational purposes and has no effect on the actual stored data,
  +   * which is always in 4-byte RGBA format.
      */
     void set format(int f) {
       if (f == _format) {
  
positive.code:   Image(int width, int height, [this._format = RGBA]) :
      this.width = width,
      this.height = height,
      _data = new Uint32List(width * height);
  
    /**
     * Create a copy of the image [other].
  
negative.code:     this.height = height,
      // Create a uint32 view of the byte buffer.
      // This assumes the system architecture is little-endian...
      data = bytes is Uint8List ? new Uint32List.view(bytes.buffer) :
              bytes is Uint8ClampedList ? new Uint32List.view(bytes.buffer) :
              bytes is Uint32List ? new Uint32List.view(bytes.buffer) :
              new Uint32List.view(new Uint8List.fromList(bytes).buffer);
  