anchor.diff:  import 'package:polaris/core/dto.dart' as dto;
   
   void main() {
  -  pin.Manager _makePinManager() {
  +  pin.Manager makePinManager() {
       final mockHttpClient = mock.HttpClient();
       final collectionCache = CollectionCache(Collection());
       final connectionManager = connection.Manager(httpClient: mockHttpClient);
  
positive.code:   });
  
    test('Can add/remove directory', () async {
      final pin.Manager pinManager = _makePinManager();
  
      final dto.Directory directory = dto.Directory(path: 'root/Heron/Aegeus');
      pinManager.pin('host', dto.CollectionFile(Right(directory)));
  
negative.code:   }
  
    test('Can add/remove song', () async {
      final pin.Manager pinManager = makePinManager();
  
      final dto.Song song = dto.Song(path: 'root/Heron/Aegeus/Labyrinth.mp3');
      pinManager.pin('host', dto.CollectionFile(Left(song)));
  