UIStoryboard helpers

extension UIStoryboard {
    
    static func main() -> UIStoryboard {
        return UIStoryboard(name: "Main", bundle: nil)
    }
    
//    assuming that name of the class is the identifier
    static func controllerOfType<C where C : UIViewController> (type : C.Type) -> C {
        let name = String(type)
        let vc = UIStoryboard.main().instantiateViewControllerWithIdentifier(name)
        
        let instance = vc as! C
        
        return instance
    }
}