ILArCalculatorSvc Node1 ILArCalculatorSvc + ILArCalculatorSvc() + DeclareInterfaceID() + ~ILArCalculatorSvc() + initializeForSDCreation() + OOTcut() + isInTime() + Process() Node3 DerivedILArCalculatorSvc ForTest + DerivedILArCalculatorSvc ForTest() + ~DerivedILArCalculatorSvc ForTest() + sysInitialize() + sysStart() + sysStop() + sysFinalize() + sysReinitialize() + sysRestart() + setServiceManager() + addRef() and 17 more... Node1->Node3 Node2 IService Node2->Node1