Trk::MuonTrackSummary_p2 Node1 Trk::MuonTrackSummary_p2 + m_nscatterers + m_npseudoMeasurements + MuonTrackSummary_p2() Node2 std::vector< int > + elements Node2->Node1 +m_data Node3 std::vector< bool > + elements Node3->Node1 +m_isMdt