anchor.diff:    static VerticalLine lerp(VerticalLine a, VerticalLine b, double t) {
       return VerticalLine(
         x: lerpDouble(a.x, b.x, t),
  +      label: VerticalLineLabel.lerp(a.label, b.label, t),
         color: Color.lerp(a.color, b.color, t),
         strokeWidth: lerpDouble(a.strokeWidth, b.strokeWidth, t),
         dashArray: lerpIntList(a.dashArray, b.dashArray, t),
  
positive.code:     Alignment alignment = Alignment.topLeft,
      this.labelResolver = HorizontalLineLabel.defaultLineLabelResolver,
    }) : super(padding: padding, style: style, alignment: alignment);
  }
  
  /// Draws a title on the [VerticalLine]
  
negative.code:   static HorizontalLine lerp(HorizontalLine a, HorizontalLine b, double t) {
      return HorizontalLine(
        y: lerpDouble(a.y, b.y, t),
        label: HorizontalLineLabel.lerp(a.label, b.label, t),
        color: Color.lerp(a.color, b.color, t),
        strokeWidth: lerpDouble(a.strokeWidth, b.strokeWidth, t),
        dashArray: lerpIntList(a.dashArray, b.dashArray, t),
  