add syntax-sugar

[p-x9]

SCFNotificationCenter
            .addObserver(center: .darwinNotify,
                         observer: self,
                         name: .init("darwin" as CFString),
                         suspensionBehavior: .deliverImmediately) { center, `self`, name, object, userInfo in
                print(center, name, object, userInfo)
            }

↓

SCFNotificationCenter.darwinNotify
            .addObserver(observer: self,
                         name: .init("darwin" as CFString),
                         suspensionBehavior: .deliverImmediately) { center, `self`, name, object, userInfo in
                self?.show()
                print(center, name, object, userInfo)
            }