ActsCaloTrackingVolumeBuilder Node1 ActsCaloTrackingVolumeBuilder - m_caloMgr + initialize() + ActsCaloTrackingVolumeBuilder() + trackingVolume() - build_endcap() - build_barrel() - build_box() - cellFactory() - makeCaloVolumeBounds() Node2 extends< AthAlgTool, IActsTrackingVolumeBuilder > Node2->Node1