anchor.diff:  /// [SkCanvas] it is managed by [SkPictureRecorder].
   @JS()
   @anonymous
  -class SkCanvas {
  +@staticInterop
  +class SkCanvas {}
  +
  +extension SkCanvasExtension on SkCanvas {
     external void clear(Float32List color);
     external void clipPath(
       SkPath path,
  
positive.code: }
  
  @JS()
  class SkPlaceholderAlignmentEnum {
    external SkPlaceholderAlignment get Baseline;
    external SkPlaceholderAlignment get AboveBaseline;
    external SkPlaceholderAlignment get BelowBaseline;
  
negative.code: 
  @JS()
  @anonymous
  @staticInterop
  class SkStrutStyleProperties {}
  
  extension SkStrutStylePropertiesExtension on SkStrutStyleProperties {
    external set fontFamilies(List<String>? value);
    external set fontStyle(SkFontStyle? value);
    external set fontSize(double? value);
  