Generic UIStoryboardSegue Extension for Loading destinationViewController

UIStoryboardSegue+DestinationController.swift

extension UIStoryboardSegue {
    /*
     Generic way of loading destinationViewController
     Usage:
     override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
         if let controller = segue.destinationController("SegueName", type: CustomController.self) {
             print(controller)
         }
     }
     */
    func destinationController<T>(identifier: String, type: T.Type) -> T? {
        guard let controller = self.destinationViewController as? T
            where self.identifier == identifier else {
                return nil
        }
        return controller as T
    }
}