callJoin method
Implementation
Future<Map<dynamic, dynamic>> callJoin(String callID, dynamic config) async {
final result = await promiseToFuture(
ZIM.getInstance()!.callJoin(callID, _mapToJSObject(config)))
.catchError(_handleError);
Map map = _jsObjectToMap(result);
return {'callID': map['callID'], 'info': map};
}