anchor.diff:  
   @JS()
   @anonymous
  -class SkAnimatedImage {
  +@staticInterop
  +class SkAnimatedImage {}
  +
  +extension SkAnimatedImageExtension on SkAnimatedImage {
     external int getFrameCount();
   
     external int getRepetitionCount();
  
positive.code: 
  @JS()
  @anonymous
  class SkShader {
    external void delete();
  }
  
  @JS()
  class SkMaskFilterNamespace {
    // Creates a blur MaskFilter.
    //
    // Returns `null` if [sigma] is 0 or infinite.
  
negative.code: //
  //     external SkPaint SkPaint();
  @JS('window.flutterCanvasKit.Paint')
  @staticInterop
  class SkPaint {
    external factory SkPaint();
  }
  
  extension SkPaintExtension on SkPaint {
    external void setBlendMode(SkBlendMode blendMode);
    external void setStyle(SkPaintStyle paintStyle);
    external void setStrokeWidth(double width);
  