G4UA::LengthIntegratorTool Node1 G4UA::LengthIntegratorTool - m_hSvc - m_doHistos + LengthIntegratorTool() + initialize() # makeAndFillAction() Node2 G4UA::UserActionToolBase < LengthIntegrator > # m_actions + UserActionToolBase() + fillUserAction() # makeAndFillAction() Node2->Node1 Node3 extends< AthAlgTool, IUserActionTool > Node3->Node2