LeonidKokhnovich

protocol Coordinator {
    var children: [Coordinator] { get set }
    func start()
}

LeonidKokhnovich

class NewsFeedCoordinator {
    // #1
    func start(presenter: UIViewController) {
        let newsFeedVC = NewsfeedViewController()
        newsFeedVC.onCreateNewPostOptionSelected = { [weak newsFeedVC] in
            guard let newsFeedVC = newsFeedVC else { return }
            // #2
            self.showCreateNewPostFlow(presenter: newsFeedVC)
        }
        presenter.present(newsFeedVC, animated: true, completion: nil)

LeonidKokhnovich

class NewsfeedViewController: UIViewController {
    // …
    func onCreateNewPostOptionSelected() {
        // #1
        let createNewPostVC = CreateNewPostViewController()
        self.present(createNewPostVC, animated: true, completion: nil)
    }
    // …
}
// …