Alle implementierten Schnittstellen:
IActorPlaceHolder, IALPSSIDComponent, IALPSModelElement, ICapsuleCallback, IGraphCallback, IParseablePASSProcessModelElement, IPASSProcessModelElement, IInteractionDescribingComponent, IContainableElement<IModelLayer>, IValueChangedObserver<IPASSProcessModelElement>, IValueChangedPublisher<IPASSProcessModelElement>

public class ActorPlaceHolder extends ALPSSIDComponent implements IActorPlaceHolder
From abstract pass ont: An empty model component that may be the (empty) origin or target of a message exchange can later (in implementing layers) be substituted for any other subject Idea if the place is supposed to be left empty