DetailedMuonPatternTruthCollection Node1 DetailedMuonPatternTruth Collection - m_trackCollection + DetailedMuonPatternTruth Collection() + trackCollectionLink() + DetailedMuonPatternTruth Collection() Node2 std::multimap< ElementLink < DataVector< Muon::MuonPattern Combination > >, DetailedTrackTruth > + keys + elements Node2->Node1