     }
     
     /// Set on the status bar of notification.
+    @discardableResult
     open class func onStatusBar(_ on: Bool) -> NavigationNotice {
         let notice = NavigationNotice()
         notice.onStatusBar = on

    fileprivate init() {}
    
    /// Add content to display.
    open func addContent(_ view: UIView) -> Self {
        noticeViewController.setContent(view)
        

    }
    
    /// Add content to display.
    @discardableResult
    open class func addContent(_ view: UIView) -> NavigationNotice {
        let notice = NavigationNotice()
        notice.noticeViewController.setContent(view)
