ForwardTransportModel Node1 ForwardTransportModel - m_fwdSvc - m_fwdTrack - m_fwdParticle - m_verboseLevel + ForwardTransportModel() + IsApplicable() + ModelTrigger() + DoIt() - KillPrimaryTrack() - getPrimaryParticleInformation() Node2 G4VFastSimulationModel Node2->Node1