anchor.diff:  ///  }
   /// ```
   class SizedPicture {
  +
     /// Is the showing image.
     Picture picture;
   
  
positive.code:   /// Lerps a [LineChartData] based on [t] value, check [Tween.lerp].
    @override
    LineChartData lerp(double t) => begin.lerp(begin, end, t);
  }
  
negative.code: /// in a simple way, each chart captures the touch events, and passes a concrete
  /// instance of [FlTouchInput] to the painter, and gets a generated [LineTouchResponse].
  class LineTouchData extends FlTouchData {
  
    /// Configs of how touch tooltip popup.
    final LineTouchTooltipData touchTooltipData;
  
  