Use case

I'm setting up state restoration for my app, but LicensePage doesn't have support for it. For instance, if I scroll down in the LicensePage and then leave the app while "Don't keep activities" is enabled, the scroll position is lost. And if I press on one of the list tiles, opening a new page with the licenses of a specific package, then I leave the app and open it again, I'm thrown back to the main LicensePage.

To be clear, I'm not using showLicensePage here, because I'm aware that it uses Navigator.push to push the LicensePage route, where Navigator.push doesn't support state restoration. So I used Navigator.restorablePush manually to push the page route:

class FooWidget extends StatelessWidget {
  @pragma('vm:entry-point')
  static Route<void> _buildLicensePageRoute(
      BuildContext context, Object? arguments) {
    return MaterialPageRoute(
      builder: (context) => LicensePage(
        applicationName: 'foo',
        applicationVersion: 'v1.0.0',
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    // ...
    return TextButton(child: Text('foo'), onPressed: () => Navigator.restorablePush(context, _buildLicensePageRoute));
  }
}

Which is why the main LicensePage route itself is still restored.

Proposal

Add state restoration support in LicensePage and its subpages.