TalkerListener class

It should be used for app functionality like showing SnackBar or Dialog about error or exception

The listener be called when Talker.stream received new message

TalkerListener(
 talker: talker,
 listener: (data) => _talkerListener(context, data),
 child: Text('Your app or app screen'),
),

void _talkerListener(BuildContext context, TalkerDataInterface data) {
 if (data is TalkerException || data is TalkerError) {
   ScaffoldMessenger.of(context).showSnackBar(
     SnackBar(
       content: Text(data.displayMessage),
     ),
   );
 }
}