Serve
data class Serve @JvmOverloads constructor(val departNotBefore: Double = Double.NEGATIVE_INFINITY) : StopInstruction(source)
Go there and perform the stop's action.
Parameters
depart
holds the vehicle at the stop once the action is done. An instant, not a duration, so a control that computes a schedule says what it means; an instant already past has no effect, which is what a service running late does