Dart APIunself_local_databaseCollectionDataupdateRule updateRule property Null safety String? updateRule final Implementation final String? updateRule; unself_local_database unself_local_database CollectionData updateRule property CollectionData class Constructors CollectionData fromJson Properties created createRule deleteRule extra hashCode id listRule name runtimeType system type updated updateRule viewRule Methods copyWith noSuchMethod toColumns toCompanion toJson toJsonString toString Operators operator ==