open class NSNumber2 { public init() { } public convenience init(value: Bool) { self.init() } } open class NSDecimalNumber2: NSNumber2 { // A // public override init() {} // B public init(decimal dcm: Decimal) { super.init() } }open class NSNumber2 { public init() { } public convenience init(value: Bool) { self.init() } } open class NSDecimalNumber2: NSNumber2 { // A // public override init() {} // B public init(decimal dcm: Decimal) { super.init() } }