import UIKit

protocol NibInitiable {
    static func loadFromNib() -> UIViewController?
}

class C2MViewController: UIViewController, NibInitiable {
    static func loadFromNib() -> UIViewController? {
        return C2MViewController(nibName: String(describing: self), bundle: Bundle.main)
    }
}

let ourVC = C2MViewController.loadFromNib()
// ourVC is UIViewController?, there is a better way.