Events.generic.swift

class Service {
    init(_ name: String = "default") {
        self.name = name
    }
    var name: String
    func doSomething(_ info: Int) {
        somethingWasDone.raise(info)
    }
    var somethingWasDone = Event<Int>()
    deinit {
        print("Service deinit")
    }
}
class Client {
    init(_ name: String, subscribingTo service: Service) {
        self.name = name
        self.service = service
        service.somethingWasDone.addHandler(somethingWasDoneHandler)
    }
    var name: String
    var service: Service
    lazy var somethingWasDoneHandler = EventHandler<Int> { [name] argument in
         print(name, "observes that something was done about", argument)
    }
    deinit {
        print("Client deinit")
    }
}