NeutronFastSim Node1 NeutronFastSim # m_Energy # m_fsSD # m_init # m_fsSDname # m_etaCut # m_timeCut + NeutronFastSim() + ~NeutronFastSim() + IsApplicable() + ModelTrigger() + DoIt() Node2 G4VFastSimulationModel Node2->Node1