onBackgroundMessageLocalization function
Implementation
Future<void> onBackgroundMessageLocalization(RemoteMessage message) async {
if (message.notification != null) return;
var prefs = await SharedPreferences.getInstance();
if (prefs.containsKey(_messagesKey)) {
TranslationMessages messages =
_TranslationMessages.fromString(prefs.getString(_messagesKey) ?? '');
await _handlebackground(message, messages, prefs);
}
}