Trk::VxTrackAtVertex_p2 Node1 Trk::VxTrackAtVertex_p2 + m_trkWeight + m_VertexCompatibility + m_typeOfLink + VxTrackAtVertex_p2() Node2 Trk::FitQuality_p1 + m_chiSquared + m_numberDoF + FitQuality_p1() Node2->Node1 +m_fitQuality Node3 ElementLink_p3< uint32_t > + m_elementIndex + m_SGKeyHash + ElementLink_p3() Node3->Node1 +m_origTrack Node4 TPObjRef # m_index + TPObjRef() + TPObjRef() + isNull() + typeID() + topLevelCnvID() + index() Node4->Node1 +m_perigeeAtVertex Node5 TPObjRef::typeID_t + m_TLCnvID + m_cnvID + typeID_t() + topLevelCnvID() + cnvID() + value() + isNull() Node5->Node4 #m_typeID