library; import 'package:english_words/english_words.dart'; import 'package:flutter/material.dart'; class MyAppState extends ChangeNotifier { var current = WordPair.random(); var favourites = []; void getNext() { current = WordPair.random(); notifyListeners(); } void toggleFavourites() { if (favourites.contains(current)) { favourites.remove(current); } else { favourites.add(current); } notifyListeners(); } }