how to dismiss two view controllers in swift code example

Example 1: dismiss two view controllers at once swift

if let first = presentingViewController,
        let second = first.presentingViewController{
          first.view.isHidden = true
          second.dismiss(animated: true)

     }

Example 2: dismiss two view controllers at once swift

self.presentingViewController?.presentingViewController?.dismiss(animated: true, completion: nil)