ViewController.swift

private func bindAvatarToImageView() {
    getAvatarFromTheServer()
        .handleEvents(receiveSubscription: { [weak self] in
            print("Subscribed", $0)
            self?.state = .loading
        }, receiveOutput: {
            print("Got image", $0)
        }, receiveCompletion: {
            print("Completion", $0)
        })
        .delay(for: 1, scheduler: DispatchQueue.global())
        .retry(3)
        .replaceError(with: UIImage(named: "placeholder")!)
        .receive(on: DispatchQueue.main)
        .sink(receiveCompletion: { completion in
            switch completion {
            case .finished:
                print("Finished")
            }
        }, receiveValue: { [weak self] image in
            self?.imageView.image = image
            self?.state = .loadedSuccessfully
        })
        .store(in: &cancellables)
}