import 'package:injectable/injectable.dart'; abstract class Env { String get baseUrl; // add getter here... } @Injectable(as: Env) @dev class DevEnv implements Env { @override // String get baseUrl => 'http://192.168.1.30:4000'; // example value String get baseUrl => 'https://api-pos.apskel.id'; // example value } @Injectable(as: Env) @prod class ProdEnv implements Env { @override String get baseUrl => 'https://api-pos.apskel.id'; }