aws appsync subscription not working with flutter graphql_flutter package

Issue my pubspec.yaml dev_dependencies: flutter_test: sdk: flutter graphql_flutter: ^4.0.0 roomctrl.dart import ‘package:flutter/material.dart’; import ‘package:graphql_flutter/graphql_flutter.dart’; import ‘package:innospace/config/appsync-service.dart’; import ‘package:innospace/config/client_provider.dart’; class RoomCtrl extends StatefulWidget { RoomCtrl({Key key}) : super(key: key); _RoomCtrlState createState() => _RoomCtrlState(); } class _RoomCtrlState extends State<RoomCtrl> { @override void

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