Is there an existing issue for this?

• I have searched the existing package issues
• I have read the guide to filing a bug

What package does this bug report belong to?

go_router_builder

What target platforms are you seeing this bug on?

Android, iOS, Web, macOS, Linux, Windows

Have you already upgraded your packages?

Yes

Dependency versions

[Paste file content here]

Steps to reproduce

1. install

go_router: 10.0.0
go_router_builder: 2.2.3

2. make a ShellRoute without const constructor

@TypedShellRoute<AppShell>(
  routes: <TypedRoute<RouteData>>[
      ],
)
class AppShell extends ShellRouteData {
  
  @override
  Widget builder(BuildContext context, GoRouterState state, Widget navigator) {
    // TODO: implement builder
    return AppLayout(
      child: navigator,
    );
  }
}

3. run code generation

flutter pub run build_runner build --delete-conflicting-outputs

Expected results

The expected result is that the generated source compiles

Actual results

The generated source does not compile because the builder adds const keyword when it generates the code.

Code sample

/// AppShell without const constructor
class AppShell extends ShellRouteData {
  
  @override
  Widget builder(BuildContext context, GoRouterState state, Widget navigator) {
    // TODO: implement builder
    return AppLayout(
      child: navigator,
    );
  }
}

/// Generated code that does not compile because of the const keyword

extension $AppShellExtension on AppShell {
  static AppShell _fromState(GoRouterState state) => const AppShell();
}

Screenshots or Videos

Logs

[Paste your logs here]

Flutter Doctor output

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.10.6, on macOS 14.0 23A5286i darwin-arm64, locale en-NG)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 14.0.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2022.2)
[✓] IntelliJ IDEA Ultimate Edition (version 2022.3.3)
[✓] VS Code (version 1.80.1)
[✓] Connected device (3 available)
[✓] Network resources

• No issues found!