anchor.diff:  
     @override
     void performResize() {
  -    if (_useIntrinsicSize) {
  -      super.performResize();
  -    }
       size = constraints.biggest;
     }
   
  
positive.code:   @override
    void performLayout() {
      if (!sizedByParent) {
        size = constraints.constrain(_intrinsicSize);
      }
    }
  
  
negative.code:   BoxFit _fit;
    Alignment _alignment;
    bool _useIntrinsicSize = false;
  
    bool get useIntrinsicSize => _useIntrinsicSize;
    set useIntrinsicSize(bool value) {
  