如何打印多个标记google map api 0.5.7 Flutter

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

class MapScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // 初始化标记列表
    List<Marker> markers = [
      Marker(
        markerId: MarkerId('marker1'),
        position: LatLng(37.4219999, -122.0840575),
        infoWindow: InfoWindow(title: 'Marker 1'),
      ),
      Marker(
        markerId: MarkerId('marker2'),
        position: LatLng(37.42796133580664, -122.085749655962),
        infoWindow: InfoWindow(title: 'Marker 2'),
      ),
      // 添加更多标记...
    ];

    return Scaffold(
      appBar: AppBar(
        title: Text('Google Maps'),
      ),
      body: GoogleMap(
        initialCameraPosition: CameraPosition(
          target: LatLng(37.4219999, -122.0840575),
          zoom: 12,
        ),
        markers: Set<Marker>.from(markers),
      ),
    );
  }
}