Odtnhj

The post request throwing error while setting the header map.

Here is my code

Future<GenericResponse> makePostCall(
 GenericRequest genericRequest) String URL = "$BASE_URL/api/";

Map data = 
 "name": "name",
 "email": "email",
 "mobile": "mobile",
 "transportationRequired": false,
 "userId": 5,
;

Map userHeader = "Content-type": "application/json", "Accept": "application/json";


return _netUtil.post(URL, body: data, headers:userHeader).then((dynamic res) 
 print(res);
 if (res["code"] != 200) throw new Exception(res["message"][0]);
 return GenericResponse.fromJson(res);
);

but I'm getting this exception with headers.

`══╡ EXCEPTION CAUGHT BY GESTURE ╞═
flutter: The following assertion was thrown while handling a gesture:
flutter: type '_InternalLinkedHashMap' is not a subtype of type 'Map'
flutter:
flutter: Either the assertion indicates an error in the framework itself, or we should provide substantially
flutter: more information in this error message to help you determine and fix the underlying cause.
flutter: In either case, please report this assertion by filing a bug on GitHub:
flutter: https://github.com/flutter/flutter/issues/new?template=BUG.md
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0 NetworkUtil.post1 (package:saranam/network/network_util.dart:50:41)
flutter: #1 RestDatasource.bookPandit (package:saranam/network/rest_data_source.dart:204:21)

Anybody facing this issue? I didn't find any clue with the above log.

try

 Map<String, String> requestHeaders = 
 'Content-type': 'application/json',
 'Accept': 'application/json',
 ;