MuonGM::DriftTube Node1 MuonGM::DriftTube + gasMaterial + tubeMaterial + plugMaterial + wireMaterial + length + outerRadius + gasRadius + plugLength + build() + print() + DriftTube() Node2 MuonGM::DetectorElement + name + logVolName + DetectorElement() + setLogVolName() + print() + ~DetectorElement() Node2->Node1