anchor.diff:    /// Lerps a [LineChartData] based on [t] value, check [Tween.lerp].
     @override
     LineChartData lerp(double t) => begin.lerp(begin, end, t);
  -}
  +}
positive.code: 
  /// Holds data for showing dots on the bar line.
  class FlDotData {
    /// Determines show or hide all dots.
    final bool show;
  
  
negative.code: 
  /// Holds representation data for showing tooltip popup on top of spots.
  class LineTouchTooltipData {
  
    /// The tooltip background color.
    final Color tooltipBgColor;
  
  