TouchedMuonChamberHelper::Imp Node1 TouchedMuonChamberHelper::Imp + updatesnotcheduled + ensureScheduleUpdate() Node3 TouchedMuonChamberHelper + TouchedMuonChamberHelper() + ~TouchedMuonChamberHelper() + incrementNumberOfObjects ForPV() + decrementNumberOfObjects ForPV() + isTouchedByTrack() + eraseEventData() + updateTouchedByTracks() - checkForChangeInTouchedChambers() Node1->Node3 -m_d Node2 std::map< GeoPVConstLink, unsigned > + keys + elements Node2->Node1 +pv2count Node3->Node1 +theclass Node4 QObject Node4->Node3 Node5 std::set< GeoPVConstLink > + keys Node5->Node1 +lastEmittedSet +touchedByTracksSet