我正在使用谷歌新的附近搜索API来生成一个标记我周围的地方的列表，我得到这个错误

type '\\\_Map\\\<String, dynamic\\\>' is not a subtype of type 'String'

字符串
我是Flutter的新手，但我设法得到了一个响应，我认为错误发生在调用API后从JSON转换时，这是我得到的JSON体

{
     "places": [
         {
             "id": "ChIJH1SlB1OgHBURC9Io_36xG2Y",
             "formattedAddress": "XV9F+7MW, Amman, Jordan",
             "location": {
                 "latitude": 31.968225099999998,

                 "longitude": 35.874212299999996
             },
             "displayName": {
                 "text": "Sido AlKurdi Mosque",
                 "languageCode": "en"
             },
             "photos": [
                 {
                    
                     
                 },
                 
             ]
         },
         {
             "id": "ChIJtXIJhK2hHBURntIqDaJGrNg",
             "formattedAddress": "Al Imam Muslim 22, Amman, Jordan",
             "location": {
                 "latitude": 31.9706942,
                 "longitude": 35.882999399999996
             },
             "displayName": {
                 "text": "مسجد بر الوالدين (ضاحية الحسين)",
                 "languageCode": "ar"
             }
        }
     ]
}

型
我已经使用dart2json插件将其转换为JSON
这是我的回收

abstract class HttpRepository {Future<Response?> googleNearbySearch({required Map<String, dynamic> payload,});}}

型
这是回购协议的实现

class HttpRepositoryImpl extends GetConnect implements HttpRepository {
  @override
  Future<Response?> googleNearbySearch({
    required Map<String, dynamic> payload,
  }) async {
    var response = await post(
      ApiUrls.googleNearbySearch,
      headers: googleMapsHeaders,
      payload,
    );
    if (response.isOk) {
     
      return response;
    } else if (response.unauthorized) {
      CustomToast.unAuthorized();
    } else if (response.hasError) {
   
      CustomToast.backEndError(message: "something went wrong");
    }
    return null;
  }
}

型
这是我的控制器我使用getx和get_connect来处理我的API调用代码不完整，因为我删除了它的一些片段
因为它太长了，如果有人想帮助我，发现代码缺乏，我可以稍后提供它

class NearbyMosquesController extends GetxController {final HttpRepository httpRepository;final CacheUtils cacheUtils;

NearbyMosquesController({required this.httpRepository, required this.cacheUtils});

List<NewNearbyMosques> mapModelList = <NewNearbyMosques>[].obs;

var markers = RxSet<Marker>();

var isDoneLoading = false.obs;

Rx<NewNearbyMosques?> nearbyMosquesModel = Rx<NewNearbyMosques?>(null);

String apiKey = "********************";

googleNearbySearch() async {try {isDoneLoading(true);final payload = json.encode({"includedTypes": ["mosque"],"maxResultCount": 10,"locationRestriction": {"circle": {"center": {"latitude": 37.7937, "longitude": 32.3965},"radius": 10000.0}}});late Rx<Response?> googleNearbySearchResponse = Rx<Response?>(null);

Position position = await determinePosition();
  googleNearbySearchResponse.value =
      await httpRepository.googleNearbySearch(
    
    payload: json.decode(payload),
  );
  var result = jsonDecode(googleNearbySearchResponse.value!.body);

  // Set<Marker> newMarkers = createMarkers();
  if (googleNearbySearchResponse.value == null) {
    return null;
  }
  mapModelList.addAll(RxList<Map<String, dynamic>>.from(result)
      .map((e) => NewNearbyMosques.fromJson(e))
      .toList());
  nearbyMosquesModel.value = NewNearbyMosques.fromJson(
    googleNearbySearchResponse.value!.body,
  );
} catch (e) {
  createMarkersFromList();
  debugPrint(
      'this is another error in the catch   ${e.toString()}\n\n\n\n\n\n\n\n\n\n\n');
  CustomToast.backEndError(
    message: 'error while calling google',
  );
} finally {
  isDoneLoading(false);
  createMarkersFromList();
  CustomToast.backEndError(
    message: 'in the finally',
  );
}

}

createMarkersFromList() {mapModelList.forEach((element) {var places = element.places;

if (places != null) {
   
     for (int i = 0; i < places.length; i++) {
   

    markers.add(
      Marker(
        markerId: MarkerId(
          places[i].id.toString(),
        ),
        icon: BitmapDescriptor.defaultMarkerWithHue(
          BitmapDescriptor.hueAzure,
        ),
        position: LatLng(
          places[i].location!.latitude!,
          places[i].location!.longitude!,
        ),
        infoWindow: InfoWindow(
          title: places[i].displayName.toString(),
          snippet: places[i].formattedAddress.toString(),
        ),
        onTap: () {},
      ),
    );
     }
  }
});

}

@overrideFuture<void> onInit() async {try {

getCurrentLocation();
  await googleNearbySearch();
 
  await determinePosition();

  super.onInit();
} catch (e) {
  print('Initialization error: $e');
}

}}

this is the curl for the post call 
     curl -X POST -d '{ "includedTypes": ["restaurant"], "maxResultCount": 10, "locationRestriction": { "circle": { "center": { "latitude": 37.7937, "longitude": -122.3965}, "radius": 500.0 } } }' \ -H 'Content-Type: application/json' -H "X-Goog-Api-Key: API_KEY" \ -H "X-Goog-FieldMask: places.displayName" \ places.googleapis.com/v1/places:searchNearby

here I think im getting the response and converting it to a list of map\<string, dynamic\> to use it as a marker I'm not sure though as I said I'm still new

我得到的响应没有问题，但在捕捉我得到的标题中键入的错误
我希望从响应中获得位置（纬度、经度）的标记列表，以便将其添加到GoogleMap小部件中的markers：named参数中