ForwardTransportModelTool Node1 ForwardTransportModelTool - m_FwdTrSvcName + ForwardTransportModelTool() + ~ForwardTransportModelTool() # makeFastSimModel() Node2 FastSimulationBase # m_regionNames # m_noRegions - m_FastSimModel + FastSimulationBase() + ~FastSimulationBase() + initializeFastSim() + BeginOfAthenaEvent() + EndOfAthenaEvent() # getFastSimModel() - setFastSimModel() - deleteFastSimModel() Node2->Node1 Node3 extends< AthAlgTool, IFastSimulation > Node3->Node2