Swift 3: @autoclosure syntax to call functions upon UIAlertViewController's callbacks

NoteViewController.swift

/// The Medium artcile, discussing the approach
/// https://medium.com/@euginedubinin/swift-useful-autoclosure-when-presenting-uialertviewcontroller-b592d1643a50#.kx0fuqm1x

final class NoteViewController: UIViewController {
  
  // ... set up target-action for an Edit UIButton somewhere here ...
  
  private dynamic func handleEditButton() {
    presentEditConfirmationDialog(onEdit: self.editArticle(), 
                                  onCancel: () )  /* assuming you have nothing to do upon cancellation */
  }
  
  private func presentEditConfirmationDialog(onEdit: @escaping @autoclosure (Void)->Void, onCancel: @escaping @autoclosure (Void)->Void ) {
    let message = "Do you want to edit the note?"
    
    let actionSheetController: UIAlertController = UIAlertController(title: nil, message: message, preferredStyle: .alert)
    
    let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel",
                                                    style: .cancel) { _ in
                                                                     onCancel()
                                                                    }
    actionSheetController.addAction(cancelAction)    
    
    let editAction: UIAlertAction = UIAlertAction(title: "Edit",
                                                  style: .default) { _ in
                                                                    onEdit()
                                                                   }
    actionSheetController.addAction(editAction)    
    
    self.present(actionSheetController, animated: true, completion: nil)
  }
  
  // ... other code ...
}