anchor.diff:        titlesData: titlesData ?? this.titlesData,
         axisTitleData: axisTitleData ?? this.axisTitleData,
         extraLinesData: extraLinesData ?? this.extraLinesData,
  +      rangeAnnotations: rangeAnnotations ?? this.rangeAnnotations,
         lineTouchData: lineTouchData ?? this.lineTouchData,
         showingTooltipIndicators: showingTooltipIndicators ?? this.showingTooltipIndicators,
         gridData: gridData ?? this.gridData,
  
positive.code:   final FlTitlesData titlesData;
    final ExtraLinesData extraLinesData;
    final LineTouchData lineTouchData;
    final List<MapEntry<int, List<LineBarSpot>>> showingTooltipIndicators;
  
    LineChartData({
  
negative.code:     FlTitlesData titlesData,
      FlAxisTitleData axisTitleData,
      ExtraLinesData extraLinesData,
      RangeAnnotations rangeAnnotations,
      LineTouchData lineTouchData,
      List<MapEntry<int, List<LineBarSpot>>> showingTooltipIndicators,
      FlGridData gridData,
  