increment method
increment() is a function that increments the value of _time by 1
and then notifies all the listeners that the value of _time has changed
Implementation
void increment() {
_time++;
notifyListeners();
}increment() is a function that increments the value of _time by 1
and then notifies all the listeners that the value of _time has changed
void increment() {
_time++;
notifyListeners();
}