anchor.diff:    }
   }
   
  +/// Paints a [CirclePercentage]
   class _CirclePercentageChartPainter extends CustomPainter {
     final double strokeWidth;
     final double percent;
  
positive.code:   final TextStyle titleStyle;
    final TextStyle valueStyle;
  
    const CirclePercentage({
      Key key,
      @required this.title,
  
negative.code: 
  import 'package:flutter/material.dart';
  
  /// The widget that represents the metric percent in a circular graph.
  ///
  /// This widget will be as big as possible if no constraints are given by its parent.
  /// Otherwise it will match its parent's size.
  class CirclePercentage extends StatefulWidget {
    final String title;
    final double value;
  