How to Access Custom Hook functions from another class - flutter

Question

i have a custom hook timer_hook.dart
The way this hooks works is whenever the user open's up the page, the counter begins to count down, so i am trying to access the method "restartTimer()"
from the main class where i am using the hook. but i dont know how to achieve that, sorry i am still learning flutter. and i don't want to use the stateful widget.
import 'dart:async';
import 'package:flutter/widgets.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
Duration useCountDownTimer() {
return use(const CountdownTimer());
}
class CountdownTimer extends Hook<Duration> {
const CountdownTimer();
#override
_CountdownTimerState createState() => _CountdownTimerState();
}
class _CountdownTimerState extends HookState<Duration, CountdownTimer> {
Timer? _timer;
Duration _duration = const Duration(seconds: 6);
void countDownTime() {
const reduceSeconds = 1;
setState(() {
final seconds = _duration.inSeconds - reduceSeconds;
_duration = Duration(seconds: seconds);
if (_duration.inSeconds == 0) {
_timer?.cancel();
}
});
}
void restartTimer() {
setState(() {
_duration = const Duration(seconds: 90);
_timer =
Timer.periodic(const Duration(seconds: 1), (_) => countDownTime());
});
}
#override
void initHook() {
super.initHook();
_timer = Timer.periodic(const Duration(seconds: 1), (_) => countDownTime());
}
#override
Duration build(BuildContext context) {
return _duration;
}
#override
void dispose() {
_timer?.cancel();
super.dispose();
}
}