问如何从API添加旗帜镜像？

EN

import UIKit

class DetailsViewController: UIViewController {
   @IBOutlet weak var alpha3CodeLbl: UILabel!
   @IBOutlet weak var regionLbl: UILabel!
   @IBOutlet weak var flagImage: UIImageView!

    var countrie:jsonStruct?


    override func viewDidLoad() {
        super.viewDidLoad()
        alpha3CodeLbl.text = countrie?.alpha3Code
        regionLbl.text = countrie?.region
        let urlString = "http://restcountries.eu/rest/v2/all" + (countrie?.flag)!

        flagImage.downloadedFrom(url: url!)


    }
}

extension UIImageView {
    func downloadedFrom(url: URL, contentMode mode: UIViewContentMode = .scaleAspectFit) {
        contentMode = mode
        URLSession.shared.dataTask(with: url) { data, response, error in
            guard
                let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
                let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
                let data = data, error == nil,
                let image = UIImage(data: data)
                else { return }
            DispatchQueue.main.async() {
                self.image = image
            }
            }.resume()
    }
    func downloadedFrom(link: String, contentMode mode: UIViewContentMode = .scaleAspectFit) {
        guard let url = URL(string: link) else { return }
        downloadedFrom(url: url, contentMode: mode)
    }
}

    let urlString = "http[enter image description
 here][1]://restcountries.eu" + (countrie?.flag)!