Muon::MuonTechnologyTruth Node1 Muon::MuonTechnologyTruth Node2 std::set< Identifier > Node2->Node1 +wrongChambers +missedHits +matchedHits +matchedChambers +wrongHits +missedChambers Node3 Identifier - m_id + Identifier() + Identifier() + Identifier() + operator=() + operator=() + ~Identifier() + Identifier() + Identifier() + Identifier() + Identifier() and 38 more... - operator|=() - operator&=() - extract() - mask_shift() - extract() Node3->Node2 +keys