goBackward method
void
goBackward()
go back
Implementation
void goBackward() {
if (value._currentIndex > 0) {
value._currentIndex = value._currentIndex - 1;
notifyListeners();
}
}
go back
void goBackward() {
if (value._currentIndex > 0) {
value._currentIndex = value._currentIndex - 1;
notifyListeners();
}
}