如何保存FutureProvider的数据以避免重建

class DataModel {
  String data;

  DataModel(this.data);
}

void main() {
  runApp(
    ChangeNotifierProvider(
      create: (context) => DataModel('Initial data'),
      child: MyApp(),
    ),
  );
}

Consumer<DataModel>(
  builder: (context, dataModel, _) {
    return FutureBuilder(
      future: fetchData(), // 异步操作，返回一个Future
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.done) {
          if (snapshot.hasData) {
            dataModel.data = snapshot.data; // 将异步操作的结果保存到DataModel中
            return Text(dataModel.data);
          } else if (snapshot.hasError) {
            return Text('Error: ${snapshot.error}');
          }
        }
        return CircularProgressIndicator();
      },
    );
  },
)