Change NSUserNotification shown time

Question

I have NSUserNotification

NSUserNotification *n = [NSUserNotification new];
n.title = self.title;
n.subtitle = self.subtitle;
[NSUserNotificationCenter.defaultUserNotificationCenter deliverNotification:n];

But i cant control it banner showing time ? Is it possible to control it using some private api like

    [n setValue:@(self.ignoresDoNotDisturb) forKey:@"_ignoresDoNotDisturb"];