import 'dart:async'; import 'package:riverpod_annotation/riverpod_annotation.dart'; part 'tab_delete_cache.g.dart'; @Riverpod(keepAlive: true) class TabDeleteCache extends _$TabDeleteCache { void delete(String tabId) { state = {...state, tabId}; Timer(const Duration(seconds: 3), () { if (ref.mounted) { state = {...state}..remove(tabId); } }); } @override Set build() { return {}; } }