Trk::DetailedTrackTruthBuilder Node1 Trk::DetailedTrackTruthBuilder - m_idHelper - m_truthTrajBuilder + DetailedTrackTruthBuilder() + initialize() + buildDetailedTrackTruth() - findSubDetType() - addTrack() - countPRDsOnTruth() - makeTruthToRecMap() Node2 extends< AthAlgTool, IDetailedTrackTruthBuilder > Node2->Node1