anchor.diff:    final ChartData data;
   
     RenderChart createNode() => new RenderChart(data: data);
  -  RenderChart get root => super.root;
  +  RenderChart get renderObject => super.renderObject;
   
     void syncRenderObject(Widget old) {
       super.syncRenderObject(old);
  
positive.code:           _textTheme.body1,
            [new PlainTextSpan("${data.indicatorText}")]
          );
          _indicator.labelPainter = new ParagraphPainter(text)
            ..maxWidth = markerRect.width
            ..layout();
          _indicator.labelPosition = new Point(
  
negative.code: 
  class Gridline {
    double value;
    TextPainter labelPainter;
    Point labelPosition;
    Point start;
    Point end;
  