= [] @ObservationTracked var donuts = Donut.all @ObservationIgnored private let _$observationRegistrar = ObservationRegistrar() internal nonisolated func access<Member>( keyPath: KeyPath<FoodTruckModel , Member> ) { _$observationRegistrar.access(self, keyPath: keyPath) } internal nonisolated func withMutation<Member, T>( keyPath: KeyPath<FoodTruckModel , Member>, _ mutation: () throws -> T ) rethrows -> T { try _$observationRegistrar.withMutation(of: self, keyPath: keyPath, mutation) } @ObservationIgnored private var _orders: [Order] = [] @ObservationIgnored private var _donuts = Donut.all } extension FoodTruckModel : Observable {}