anchor.diff:    final TextStyle textStyle;
   
     /// Shows a [text] with [textStyle] as a row in the tooltip popup.
  -  LineTooltipItem(this.text, this.textStyle);
  +  LineTooltipItem(String text, TextStyle textStyle)
  +    : text = text,
  +      textStyle = textStyle;
   
     /// Used for equality check, see [EquatableMixin].
     @override
  
positive.code:   ///    final picture = svgRoot.toPicture()
    /// ```
    /// [width] and [height] determines the size of our picture.
    SizedPicture(this.picture, this.width, this.height);
  
    /// Used for equality check, see [EquatableMixin].
    @override
  
negative.code:   /// If touch happens, [LineChart] processes it internally and
    /// passes out a list of [lineBarSpots] it gives you information about the touched spot.
    /// [touchInput] is the type of happened touch.
    LineTouchResponse(List<LineBarSpot> lineBarSpots, FlTouchInput touchInput,)
      : lineBarSpots = lineBarSpots,
        super(touchInput);
  
    /// Used for equality check, see [EquatableMixin].
    @override
  