我正在尝试开发一个图表，但当make flutter运行代码时会发生什么？我无法编译应用程序。我的代码没有错误，但无法运行。我在编译此代码时出错了吗？如何检查此问题。有人可以帮助我的代码吗？

import 'package:flutter/material.dart';
    import 'package:syncfusion_flutter_charts/charts.dart';
    
    void main() {
      runApp(const MyApp());
    }
    
    class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  late TooltipBehavior _tooltipBehavior;

  @override
  void initState() {
    _tooltipBehavior = TooltipBehavior(enable: true);
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('afadff'),
        ),
        body: Center(
            child: Container(
                child: SfCartesianChart(
                    // Enables the tooltip for all the series in chart
                    tooltipBehavior: _tooltipBehavior,
                    // Initialize category axis
                    primaryXAxis: CategoryAxis(),
                    series: <ChartSeries>[
              // Initialize line series
              LineSeries<ChartData, String>(
                  // Enables the tooltip for individual series
                  enableTooltip: true,
                  dataSource: [
                    // Bind data source
                    ChartData('Jan', 35),
                    ChartData('Feb', 28),
                    ChartData('Mar', 34),
                    ChartData('Apr', 32),
                    ChartData('May', 40)
                  ],
                  xValueMapper: (ChartData data, _) => data.x,
                  yValueMapper: (ChartData data, _) => data.y)
            ]))));
  }
}

class ChartData {
  ChartData(this.x, this.y);
  final String x;
  final double? y;
}