How i add my UIViewController file to Bottomsheet about bottomsheet HOT 1 CLOSED

 let controller = BottomsheetController()
        let modalViewController = storyboard!.instantiateViewController(withIdentifier: "ModalController") as! ModalController
        controller.containerViewBackgroundColor = #colorLiteral(red: 0.03376019001, green: 0.1319173574, blue: 0.2848440409, alpha: 1)
        
        controller.overlayBackgroundColor =  UIColor.gray.withAlphaComponent(0.6)
        controller.addChildViewController(modalViewController)
        controller.addContentsView(modalViewController.view)
        modalViewController.didMove(toParentViewController: controller)
        DispatchQueue.main.async {
            self.present(controller, animated:true, completion: nil)
        }