anchor.diff:        case 'yearly':
           out = yearly;
           break;
  +      case 'byInterval':
  +        out = byInterval;
  +        break;  
       }
       return out;
     }
  
positive.code:     'daily',
      'monthly',
      'yearly',
    };
  
    factory TimeAggregation.parse(String x) {
  
negative.code:   static const daily = const TimeAggregation._internal('daily');
    static const monthly = const TimeAggregation._internal('monthly');
    static const yearly = const TimeAggregation._internal('yearly');
    static const byInterval = const TimeAggregation._internal('byInterval');
    
    String toString() => name;
  }
  