anchor.diff:    factory User.fromData(Map<String, dynamic> data, GeneratedDatabase db,
         {String? prefix}) {
       final effectivePrefix = prefix ?? '';
  -    final intType = db.typeSystem.forDartType<int>();
  -    final stringType = db.typeSystem.forDartType<String>();
       return User(
  -      id: intType.mapFromDatabaseResponse(data['${effectivePrefix}id'])!,
  -      name: stringType.mapFromDatabaseResponse(data['${effectivePrefix}name'])!,
  +      id: const IntType()
  +          .mapFromDatabaseResponse(data['${effectivePrefix}id'])!,
  +      name: const StringType()
  +          .mapFromDatabaseResponse(data['${effectivePrefix}name'])!,
       );
     }
     @override
  
positive.code:   final VerificationMeta _idMeta = const VerificationMeta('id');
    late final GeneratedIntColumn id = _constructId();
    GeneratedIntColumn _constructId() {
      return GeneratedIntColumn('id', $tableName, false,
          $customConstraints: 'NOT NULL');
    }
  
    final VerificationMeta _titleMeta = const VerificationMeta('title');
    late final GeneratedTextColumn title = _constructTitle();
    GeneratedTextColumn _constructTitle() {
      return GeneratedTextColumn('title', $tableName, false,
          $customConstraints: 'NOT NULL');
    }
  
    final VerificationMeta _deletedMeta = const VerificationMeta('deleted');
    late final GeneratedBoolColumn deleted = _constructDeleted();
    GeneratedBoolColumn _constructDeleted() {
      return GeneratedBoolColumn('deleted', $tableName, true,
          $customConstraints: 'DEFAULT FALSE',
          defaultValue: const CustomExpression<bool>('FALSE'));
    }
  
negative.code:     required String title,
      this.deleted = const Value.absent(),
      required int owner,
    })  : title = Value(title),
          owner = Value(owner);
    static Insertable<Group> custom({
      Expression<int>? id,
  