如何使用带有Flutter的Google Maps在标记上进行初始单击后更新InfoWindowText？

import 'package:google_maps_flutter/google_maps_flutter.dart';

class MapPage extends StatefulWidget {
  @override
  _MapPageState createState() => _MapPageState();
}

class _MapPageState extends State<MapPage> {
  GoogleMapController mapController;

  @override
  Widget build(BuildContext context) {
    return GoogleMap(
      onMapCreated: (controller) {
        setState(() {
          mapController = controller;
        });
      },
      onTap: (LatLng latLng) {
        // 在地图上单击时触发
        updateInfoWindow(latLng);
      },
      markers: Set<Marker>.of([
        Marker(
          markerId: MarkerId('marker_1'),
          position: LatLng(37.4219999, -122.0840575),
          onTap: () {
            // 在标记上单击时触发
            updateInfoWindow(LatLng(37.4219999, -122.0840575));
          },
        ),
      ]),
      initialCameraPosition: CameraPosition(
        target: LatLng(37.4219999, -122.0840575),
        zoom: 15,
      ),
    );
  }

  void updateInfoWindow(LatLng latLng) {
    // 更新InfoWindow的内容
    mapController.showMarkerInfoWindow(MarkerId('marker_1'));
  }
}

Marker(
  markerId: MarkerId('marker_1'),
  position: LatLng(37.4219999, -122.0840575),
  onTap: () {
    // 在标记上单击时触发
    updateInfoWindow(LatLng(37.4219999, -122.0840575));
  },
  infoWindow: InfoWindow(
    title: 'Custom InfoWindow',
    snippet: 'This is a custom InfoWindow',
  ),
),