set owner associ fig node state vertex end transit todo need document realli need param lai diagram layer contain fig param owner own uml element deprec bob tarl todo michiel don understand purpos method gef framework set sourc dest persist manag deprec init port layer lai object owner object sourc sv model facad sourc owner fig node sourc fn fig node lai present sourc sv sourc fn purpos method explain npe depend order fig read ignor futur let delet set sourc port fig sourc fn set sourc fig node sourc fn object dest sv model facad target owner fig node dest fn fig node lai present dest sv dest fn purpos method explain npe depend order fig read ignor futur let delet set dest port fig dest fn set dest fig node dest fn 