ActsTrk::IVolumePlacement Node1 ActsTrk::IVolumePlacement   + detectorType() + storeAlignedTransforms() Node3 ActsTrk::VolumePlacement - m_parent - m_refShift - m_locToGlobCache - m_globToLocCache - m_portalCaches - m_children - m_surfacePlacement + VolumePlacement() + VolumePlacement() + VolumePlacement() + addChild() + connectCenterSurface() + detectorType() + storeAlignedTransforms() + makePortalsAlignable() + localToGlobalTransform() + localToGlobalTransform() + globalToLocalTransform() + globalToLocalTransform() + portalLocalToGlobal() - localToGlobalTransform() Node1->Node3 Node2 Acts::VolumePlacementBase     Node2->Node1