G4UA::G4TrackCounterTool Node1 G4UA::G4TrackCounterTool + G4TrackCounterTool() + initialize() + finalize() # makeAndFillAction() Node2 G4UA::UserActionToolBase < G4TrackCounter > + UserActionToolBase() + fillUserAction() # makeAndFillAction() Node2->Node1 Node3 extends< AthAlgTool, IUserActionTool > Node3->Node2 Node4 G4UA::ThreadSpecificUser Action< G4TrackCounter > - m_threadMap + ~ThreadSpecificUserAction() + get() + set() + begin() + end() + accumulate() Node4->Node2 #m_actions