G4UA::CheckActivationTool Node1 G4UA::CheckActivationTool + CheckActivationTool() # makeAndFillAction() Node2 G4UA::UserActionToolBase < CheckActivation > # m_actions + UserActionToolBase() + fillUserAction() # makeAndFillAction() Node2->Node1 Node3 extends< AthAlgTool, IUserActionTool > Node3->Node2