anchor.diff:  import '../oauth_providers.dart';
   import '../provider_resolvers.dart';
   
  +const _firebaseAuthProviderParameters = {
  +  'prompt': 'select_account',
  +};
  +
   class GoogleProviderImpl extends OAuthProvider {
     String clientId;
     String redirectUri;
   
     final _provider = GoogleSignIn();
  +
  +  @override
  +  final GoogleAuthProvider firebaseAuthProvider = GoogleAuthProvider();
   
     @override
     late final desktopSignInArgs = GoogleSignInArgs(
  
positive.code:   GoogleProviderImpl({
      required this.clientId,
      required this.redirectUri,
    });
  
    @override
    Future<OAuthCredential> signIn() async {
  
negative.code:   OAuthCredential fromDesktopAuthResult(AuthResult result) {
      return GoogleAuthProvider.credential(accessToken: result.accessToken);
    }
  }
  
  class GoogleProviderConfiguration extends OAuthProviderConfiguration {
  