Dart APIunself_local_databaseCollectionDataupdated updated property Null safety DateTime updated final Implementation final DateTime updated; unself_local_database unself_local_database CollectionData updated 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 ==