import 'package:messaging_app/models/details.dart'; class Conversations { String chatId; Details details; DateTime? lastModified; Conversations({ required this.chatId, required this.details, this.lastModified, }); factory Conversations.fromData( String _chatId, String _details, String _lastModified) => Conversations( chatId: _chatId, details: Details.fromData(_details), lastModified: DateTime.parse(_lastModified)); }