오류 확인 요청

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Votes'),
      ),
      body: StreamBuilder<QuerySnapshot>(
        stream: FirebaseFirestore.instance.collection('list').snapshots(),
        builder: (context, snapshot) {
          if (!snapshot.hasData)

          return LinearProgressIndicator();

          return ListView(
            padding: EdgeInsets.symmetric(horizontal: 16,vertical: 8),
            children: snapshot.data!.docs.map((data) => buildListItem(context, data)).toList(),
          );
        },
      )
    );
  }

  Widget buildListItem(BuildContext context, DocumentSnapshot document){
    Map<String, dynamic> data =
    document.data() as Map<String, dynamic>;
    return Container(
      decoration: BoxDecoration(
        border: Border.all(color: Colors.grey),
        borderRadius: BorderRadius.circular(5.0),
      ),


      child: ListTile(
        title: Text(document.data['name']),
        trailing: Text(document.data['votes'].toString())
      ),
    );