anchor.diff: +import 'dart:async';
  +import 'dart:typed_data';
  +import 'dart:ui' as ui;
  +
   import 'package:fl_chart/fl_chart.dart';
   import 'package:flutter/material.dart';
  +import 'package:flutter/services.dart' show rootBundle;
  +import 'package:flutter_svg/flutter_svg.dart';
   
   class LineChartSample8 extends StatefulWidget {
     @override
  
positive.code: 
    bool showAvg = false;
  
    @override
    Widget build(BuildContext context) {
      return Stack(
        children: <Widget>[
          AspectRatio(
            aspectRatio: 1.70,
            child: Container(
              child: Padding(
                padding: const EdgeInsets.only(right: 18.0, left: 12.0, top: 24, bottom: 12),
                child: LineChart(
                  mainData(),
                ),
              ),
            ),
          ),
        ],
      );
    }
  
    LineChartData mainData() {
      return LineChartData(
        rangeAnnotations: RangeAnnotations(
          verticalRangeAnnotations: [
  
negative.code:               labelResolver: (line) => 'V: ${line.x}',
              ),
            ),
            VerticalLine(
              x: 8.5,
              color: Colors.transparent,
              sizedPicture: sizedPicture,
            )
          ],
        ),
        gridData: FlGridData(
  