anchor.diff:  import 'package:rive/src/rive_core/component_dirt.dart';
   import 'package:rive/src/rive_core/shapes/paint/shape_paint.dart';
   import 'package:rive/src/rive_core/shapes/paint/shape_paint_mutator.dart';
  -import 'package:rive/src/rive_core/shapes/shape_paint_container.dart';
   import 'package:rive/src/generated/shapes/paint/solid_color_base.dart';
   export 'package:rive/src/generated/shapes/paint/solid_color_base.dart';
   
  
positive.code: 
    @override
    bool validate() => super.validate() && parent is ShapePaint;
  }
  
negative.code:   @override
    void update(int dirt) {}
    @override
    void syncColor() {
      paint.color = color
          .withOpacity((color.opacity * renderOpacity).clamp(0, 1).toDouble());
  