anchor.diff:          _recordedStreams.clear();
           _recordedStreams.addAll(_dartPreset);
           break;
  -      case _Profile.custom:
  -        return;
       }
       _applyStreamChanges();
       _updateRecorderUI();
  
positive.code:   M.EventRepository _events;
    M.NotificationRepository _notifications;
    String _recorderName = '';
    _Profile _profile = _Profile.none;
    final Set<String> _availableStreams = new Set<String>();
    final Set<String> _recordedStreams = new Set<String>();
  
  
negative.code:         return 'VM Developer';
        case _Profile.all:
          return 'All';
      }
      throw new Exception('Unknown Profile ${profile}');
    }
  