anchor.diff:    /// Retrieves the names of all packages, ordered by name.
     Stream<String> allPackageNames(
         {DateTime updatedSince, bool excludeDiscontinued = false}) {
  -    final query = db.query<models.Package>();
  +    final query = db.query<Package>();
   
       if (updatedSince != null) {
         query.filter('updated >', updatedSince);
       }
   
  -    bool isExcluded(models.Package p) =>
  +    bool isExcluded(Package p) =>
           // isDiscontinued may be null
           excludeDiscontinued && p.isDiscontinued;
   
  
positive.code: }
  
  class _ValidatedUpload {
    final models.PackageVersion packageVersion;
    final models.PackageVersionPubspec packageVersionPubspec;
    final models.PackageVersionInfo packageVersionInfo;
  
    _ValidatedUpload(
      this.packageVersion,
  
negative.code:   return p;
  }
  
  api.PackagePublisherInfo _asPackagePublisherInfo(Package p) =>
      api.PackagePublisherInfo(publisherId: p.publisherId);
  
  /// Purge [cache] entries for given [package] and also global page caches.
  