MuonR4::TrackSummaryTool Node1 MuonR4::TrackSummaryTool + initialize() + makeSummary() + makeSummary() + copySummary() Node2 extends< AthAlgTool, ITrackSummaryTool > Node2->Node1 Node3 ServiceHandle< Muon ::IMuonIdHelperSvc > Node3->Node1 -m_idHelperSvc