toJson method

Implementation

@override
Map<String, dynamic> toJson() => <String, Object?>{
      'type': type,
      'id': id ?? '',
      if (fixedId case final fixedIdValue?) 'fixedId': fixedIdValue,
      if (classRef?.toJson() case final classValue?) 'class': classValue,
      if (size case final sizeValue?) 'size': sizeValue,
    };