Subscribing to a `Subject`, post-completion.

subject_post_completion.swift

var subscriptions = Set<AnyCancellable>()

let subject = CurrentValueSubject<Int, Never>(1)

subject
	.sink(
		receiveCompletion: { print("First completion: \($0)") },
		receiveValue: { print("First sink: \($0)") }
	)
	.store(in: &subscriptions)

subject.send(completion: .finished) /// (1) Making sure the finish event
/// beats out the second sink, below.

DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(3)) {
	subject
		.sink(
			receiveCompletion: { print("Second completion: \($0)") },
			receiveValue: { print("Second sink: \($0)") }
		)
		.store(in: &subscriptions)
}

/// (2) Same output as the `cherReplayingLatest` example.