anchor.diff:    const SvgImage._(this.future, this.size,
         {this.clipToViewBox = true,
         Key key,
  -      this.paintLocation = PaintLocation.Foreground})
  +      this.paintLocation = PaintLocation.Background})
         : super(key: key);
   
     factory SvgImage.asset(String assetName, Size size,
  
positive.code:       {Map<String, String> headers,
        Key key,
        bool clipToViewBox = true,
        PaintLocation paintLocation = PaintLocation.Foreground}) {
      return new SvgImage._(
        loadNetworkAsset2(uri),
        size,
  
negative.code:       AssetBundle bundle,
        String package,
        bool clipToViewBox = true,
        PaintLocation paintLocation = PaintLocation.Background}) {
      return new SvgImage._(
        loadAsset(assetName, bundle, package),
        size,
  