anchor.diff:  import 'package:shelf/shelf.dart' as shelf;
   import 'package:uuid/uuid.dart';
   
  +import '../../shared/configuration.dart';
   import '../../shared/urls.dart' as urls;
   
   import '../backend.dart';
  
positive.code:         alternateUrl, alternateTitle);
    }).toList();
  
    final id = requestedUri.resolve('/feed.atom').toString();
    final selfUrl = id;
  
    final title = 'Pub Packages for Dart';
    final subTitle = 'Last Updated Packages';
    final alternateUrl = requestedUri.resolve('/').toString();
    final author = 'Dart Team';
    final updated = DateTime.now().toUtc();
  
  
negative.code: 
    final entries = versions.map((PackageVersion version) {
      final pkgPage = urls.pkgPageUrl(version.package);
      final alternateUrl =
          activeConfiguration.primarySiteUri.replace(path: pkgPage).toString();
      final alternateTitle = version.package;
  
      // TODO: use only qualifiedVersion as seed after the domain migration
  