Key extension Mappable.Key: ServiceProvider key(item:) Unique key for database Declaration Swift static func key(item: Checklist.Item) -> Mappable.Key Parameters item Item Return Value Unique key Show on GitHub item item Declaration Swift var item: Checklist.Item { get } Show on GitHub checklist checklist Declaration Swift var checklist: Checklist { get } Show on GitHub checklistId checklistId Declaration Swift var checklistId: Int { get } Show on GitHub