如何在flutter中将数据从firestore传递到Typeahead

dependencies:
  flutter:
    sdk: flutter
  firebase_core: ^1.0.4
  cloud_firestore: ^2.5.4

import 'package:firebase_core/firebase_core.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

import 'package:cloud_firestore/cloud_firestore.dart';

void fetchDataFromFirestore() {
  FirebaseFirestore firestore = FirebaseFirestore.instance;
  // 进行Firestore的操作，如获取文档、查询数据等
}

dependencies:
  typeahead: ^2.0.0

import 'package:typeahead/typeahead.dart';

Widget buildTypeaheadWidget(List<String> data) {
  return TypeaheadFormField<String>(
    suggestionsCallback: (pattern) async {
      // 在这里可以根据输入的关键字从Firestore中获取匹配的数据
      // 返回的结果将作为自动完成的建议列表
      List<String> suggestions = await fetchSuggestionsFromFirestore(pattern);
      return suggestions;
    },
    itemBuilder: (context, suggestion) {
      // 构建每个建议项的UI
      return ListTile(
        title: Text(suggestion),
      );
    },
    onSuggestionSelected: (suggestion) {
      // 处理选择的建议项
      handleSelectedSuggestion(suggestion);
    },
  );
}