AtlasG4EventUserInfo Node1 AtlasG4EventUserInfo - m_theEvent - m_currentPrimaryGenParticle - m_currentGenParticle - m_lastProcessedTrackID - m_lastProcessedStep + AtlasG4EventUserInfo() + GetHepMCEvent() + SetHepMCEvent() + GetCurrentPrimaryGenParticle() + SetCurrentPrimaryGenParticle() + GetCurrentGenParticle() + GetCurrentGenParticle() + SetCurrentGenParticle() + GetLastProcessedTrackID() + SetLastProcessedTrackID() + GetLastProcessedStep() + SetLastProcessedStep() + Print() Node2 G4VUserEventInformation Node2->Node1