iOS Swift. How to check validity of URL in Swift?

There is system method to check validity of URL -  UIApplication.shared.canOpenURL(url as URL)

import Foundation
import UIKit

extension NSURL {
    func verifyUrl () -> Bool {
        //Check for nil
        if let urlString = self.absoluteString {
            // create NSURL instance
            if let url = NSURL(string: urlString) {
                // check if your application can open the NSURL instance
                return UIApplication.shared.canOpenURL(url as URL)
            }
        }
        return false
    }
}