如何跳过项生成器中的构建gridview.builder Flutter Firebase流生成器

import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

class MyGridView extends StatefulWidget {
  @override
  _MyGridViewState createState() => _MyGridViewState();
}

class _MyGridViewState extends State<MyGridView> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('GridView.builder with Firebase Stream'),
      ),
      body: StreamBuilder(
        stream: FirebaseFirestore.instance.collection('your_collection').snapshots(),
        builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
          if (snapshot.hasError) {
            return Text('Error: ${snapshot.error}');
          }

          if (snapshot.connectionState == ConnectionState.waiting) {
            return CircularProgressIndicator();
          }

          return GridView.builder(
            gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: 2, // 每行显示的网格数量
              crossAxisSpacing: 10.0, // 网格之间的水平间距
              mainAxisSpacing: 10.0, // 网格之间的垂直间距
            ),
            itemCount: snapshot.data.docs.length,
            itemBuilder: (BuildContext context, int index) {
              DocumentSnapshot document = snapshot.data.docs[index];
              // 在这里构建每个网格项的UI
              return GridTile(
                child: Text(document['your_field']),
              );
            },
          );
        },
      ),
    );
  }
}

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Firebase GridView',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyGridView(),
    );
  }
}