G4UA::iGeant4::TrackProcessorUserActionPassBackTool Node1 G4UA::iGeant4::TrackProcessor UserActionPassBackTool - m_config + TrackProcessorUserAction PassBackTool() # makeAndFillAction() Node2 G4UA::UserActionToolBase < TrackProcessorUserActionPass Back > # m_actions + UserActionToolBase() + fillUserAction() # makeAndFillAction() Node2->Node1 Node3 extends< AthAlgTool, IUserActionTool > Node3->Node2