anchor.diff:    RenderIntrinsicWidth createRenderObject() => new RenderIntrinsicWidth(stepWidth: stepWidth, stepHeight: stepHeight);
   
     void updateRenderObject(RenderIntrinsicWidth renderObject, IntrinsicWidth oldWidget) {
  -    renderObject.stepWidth = stepWidth;
  -    renderObject.stepHeight = stepHeight;
  +    renderObject
  +      ..stepWidth = stepWidth
  +      ..stepHeight = stepHeight;
     }
   }
   
  
positive.code:   );
  
    void updateRenderObject(RenderPointerListener renderObject, Listener oldWidget) {
      renderObject.onPointerDown = onPointerDown;
      renderObject.onPointerMove = onPointerMove;
      renderObject.onPointerUp = onPointerUp;
      renderObject.onPointerCancel = onPointerCancel;
      renderObject.behavior = behavior;
    }
  
    void debugFillDescription(List<String> description) {
  
negative.code:   );
  
    void updateRenderObject(RenderIgnorePointer renderObject, IgnorePointer oldWidget) {
      renderObject
        ..ignoring = ignoring
        ..ignoringSemantics = ignoringSemantics;
    }
  }
  
  