Flutter/Dart - Instance member 'displayNotification' can't be accessed using static access

Question

I'm using firebaseMessagingBackgroundHandlerin a Flutter plugin called FCMConfig.

Previously the following code previously worked.

Future<void> firebaseMessagingBackgroundHandler(
    RemoteMessage _notification) async {
  print('Handling a background message: ${_notification.data["title"]}');
  String fcmname = _notification.data["name"];
  String fcmtitle = _notification.data["title"];
  String fcmmessage = _notification.data["message"];
  String title = _notification.data["title_key"];
FCMConfig.displayNotification(title: fcmtitle, body:fcmname);
}

But after some updates to the 2.1.2 minimum SDK I've started to get this error;

 Instance member 'displayNotification' can't be accessed using static access.

How can I fix this?

Answer 1

According to the documentation, you are supposed to do this:

Future<void> firebaseMessagingBackgroundHandler(
RemoteMessage _notification) async {
   print('Handling a background message: ${_notification.data["title"]}');
   String fcmname = _notification.data["name"];
   String fcmtitle = _notification.data["title"];
   String fcmmessage = _notification.data["message"];
   String title = _notification.data["title_key"];
   FCMConfig().displayNotification(title: fcmtitle, body:fcmname); // <---
}

You forgot the parenthesis ().