removeListener method
Remove a previously registered closure from the list of closures that the object notifies.
Implementation
@override
void removeListener(VoidCallback listener) {
_listeners.removeWhere((l) => l.action == listener);
}
Remove a previously registered closure from the list of closures that the object notifies.
@override
void removeListener(VoidCallback listener) {
_listeners.removeWhere((l) => l.action == listener);
}