IEnvelopeDefSvc Node1 IEnvelopeDefSvc + DeclareInterfaceID() + ~IEnvelopeDefSvc() + getRZBoundary() + getRPositiveZBoundary() + getBeamPipeRZBoundary() + getInDetRZBoundary() + getCaloRZBoundary() + getMuonRZBoundary() + getCavernRZBoundary() # mirrorRZ() Node2 IInterface Node2->Node1