G4UA::G4TrackCounter Node1 G4UA::G4TrackCounter + BeginOfEventAction() + PreUserTrackingAction() + getReport() Node2 G4UserEventAction Node2->Node1 Node3 G4UserTrackingAction Node3->Node1 Node4 G4UA::G4TrackCounter ::Report + nEvents + nTotalTracks + nPrimaryTracks + nSecondaryTracks + n50MeVTracks + merge() Node4->Node1 -m_report