protected override void InternalScheduleOnce(
	TimeSpan delay,
	Action action,
	ICancelable cancelable
)

abstract InternalScheduleOnce : 
        delay : TimeSpan * 
        action : Action * 
        cancelable : ICancelable -> unit 
override InternalScheduleOnce : 
        delay : TimeSpan * 
        action : Action * 
        cancelable : ICancelable -> unit