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