anchor.diff:      Alignment alignment = Alignment.bottomRight,
       this.labelResolver = VerticalLineLabel.defaultLineLabelResolver,
     }) : super(padding: padding, style: style, alignment: alignment);
  +
  +  static VerticalLineLabel lerp(VerticalLineLabel a, VerticalLineLabel b, double t) {
  +    return VerticalLineLabel(
  +      padding: EdgeInsets.lerp(a.padding, b.padding, t),
  +      style: TextStyle.lerp(a.style, b.style, t),
  +      alignment: Alignment.lerp(a.alignment, b.alignment, t),
  +      labelResolver: b.labelResolver,
  +    );
  +  }
  +
   }
   
   /// Holds data for showing a vector image inside the chart.
  
positive.code:   static VerticalLine lerp(VerticalLine a, VerticalLine b, double t) {
      return VerticalLine(
        x: lerpDouble(a.x, b.x, t),
        color: Color.lerp(a.color, b.color, t),
        strokeWidth: lerpDouble(a.strokeWidth, b.strokeWidth, t),
        dashArray: lerpIntList(a.dashArray, b.dashArray, t),
  
negative.code:     Alignment alignment = Alignment.topLeft,
      this.labelResolver = HorizontalLineLabel.defaultLineLabelResolver,
    }) : super(padding: padding, style: style, alignment: alignment);
  
    static HorizontalLineLabel lerp(HorizontalLineLabel a, HorizontalLineLabel b, double t) {
      return HorizontalLineLabel(
        padding: EdgeInsets.lerp(a.padding, b.padding, t),
        style: TextStyle.lerp(a.style, b.style, t),
        alignment: Alignment.lerp(a.alignment, b.alignment, t),
        labelResolver: b.labelResolver,
      );
    }
  }
  
  /// Draws a title on the [VerticalLine]
  