#if BEFORE open class AddStoredProperty { public let x: Int public init(x: Int) { self.x = x } public func get() -> (Int, Int) { return (x, -x) } } #else open class AddStoredProperty { public let x: Int public let y: Int public init(x: Int) { self.x = x self.y = -x } public func get() -> (Int, Int) { return (x, y) } } #endif