BeamPipeDetectorManager Node1 BeamPipeDetectorManager + BeamPipeDetectorManager() + ~BeamPipeDetectorManager() + getNumTreeTops() + getTreeTop() + addTreeTop() - operator=() - BeamPipeDetectorManager() Node2 GeoVDetectorManager Node2->Node1 Node3 std::vector< PVConstLink > + elements Node3->Node1 -m_volume