anchor.diff:        labelResolver: b.labelResolver,
       );
     }
  -
   }
   
   /// Holds data for showing a vector image inside the chart.
  
positive.code: /// You can override [LineTouchData.touchCallback] to handle touch events,
  /// it gives you a [LineTouchResponse] and you can do whatever you want.
  class LineTouchResponse extends BaseTouchResponse {
  
    /// touch happened on these spots
    /// (if a single line provided on the chart, [lineBarSpots]'s length will be 1 always)
    final List<LineBarSpot> lineBarSpots;
  
negative.code: 
  /// Represent a targeted spot inside a line bar.
  class LineBarSpot extends FlSpot {
    /// Is the [LineChartBarData] that this spot is inside of.
    final LineChartBarData bar;
  
  