Static CPNavigationAlertMinimumDuration 

pub static CPNavigationAlertMinimumDuration: NSTimeInterval

Available on crate feature CPNavigationAlert only.

Your CPNavigationAlertmay specify a duration for which the alert will be visible onscreen, or 0 for an alert that is visible indefinitely.

For non-indefinite alerts, this is the minimum duration the alert will be visible.

See also Apple’s documentation