import 'package:flutter/widgets.dart'; import 'package:get/state_manager.dart'; class ValueStorage { ValueStorage(T value) : this._value = Value(value); final Value _value; Map changes = {}; void changeValue(String key, dynamic value) { changes = {key: value}; // ignore: invalid_use_of_protected_member _value.refresh(); } T get value => _value.value; set value(T value) { _value.value = value; } VoidCallback addListener(VoidCallback callback) { _value.addListener(callback); return () => _value.removeListener(callback); } }