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 } @Injectable(as: Env) @prod class ProdEnv implements Env { @override String get baseUrl => 'https://enaklo-pos-be.altru.id'; }