After navigate to root view controller from side menu,side menu is not able visible

[venkateshaelegenie]

After navigate to root view controller from side menu,the side menu is not able to visible

I have wrriten the below code in my side menu table view did select

  let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let leftMenuVC: SideMenuViewController = mainStoryboard.instantiateViewController(withIdentifier: 
  "SideMenuViewController") as! SideMenuViewController
        let centerVC: TabbarViewController  = mainStoryboard.instantiateViewController(withIdentifier: "TabbarViewController") as! TabbarViewController
        let centerNavVC = UINavigationController(rootViewController: centerVC)
        centerNavVC.navigationBar.isHidden=true
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        //  Case 2: With Xtoryboards, Xibs And NSCoder
        let rootController: FAPanelController = appDelegate.window?.rootViewController as! FAPanelController
        _ = rootController.center(centerNavVC).left(leftMenuVC)
        //  For Case 1 only
        appDelegate.window?.rootViewController = rootController