Muon::MuonSegmentKey Node1 Muon::MuonSegmentKey + MuonSegmentKey() + MuonSegmentKey() + MuonSegmentKey() + calculateKeys() + ~MuonSegmentKey() + keys() + keysTrigger() Node2 std::set< std::pair < unsigned int, int > > + keys Node2->Node1 -m_measKeysTrigger -m_measKeys