FluttyStateErrorCallback typedef
Signature for callbacks invoked when a fetch or submit operation fails.
message is the human-readable error message that will be shown to the
user. exception is the raw error caught by the cubit. It may be null
if no exception was associated with the failure, and is typed as
Object because Dart try/catch can catch any object (not only
Exceptions).
Implementation
typedef FluttyStateErrorCallback = void Function(
String message,
Object? exception,
);