Trk::IModuleStepper Node1 Trk::IModuleStepper + ~IModuleStepper() + cellSteps() + cellSteps() + interfaceID() Node3 Trk::PlanarModuleStepper + PlanarModuleStepper() + ~PlanarModuleStepper() + initialize() + finalize() + cellSteps() + cellSteps() Node1->Node3 Node2 IAlgTool Node2->Node1