Trk::VxCandidate_p1 Node1 Trk::VxCandidate_p1 + m_vertexType + VxCandidate_p1() Node2 std::vector< TPObjRef > Node2->Node1 +m_vxTrackAtVertex Node3 TPObjRef # m_index + TPObjRef() + TPObjRef() + isNull() + typeID() + topLevelCnvID() + index() Node3->Node1 +m_recVertex Node3->Node2 +elements Node4 TPObjRef::typeID_t + m_TLCnvID + m_cnvID + typeID_t() + topLevelCnvID() + cnvID() + value() + isNull() Node4->Node3 #m_typeID