G4UA::StepHistogramTool Node1 G4UA::StepHistogramTool + StepHistogramTool() + initialize() + finalize() # makeAndFillAction() - BookHistograms() Node2 G4UA::UserActionToolBase < StepHistogram > + UserActionToolBase() + fillUserAction() # makeAndFillAction() Node2->Node1 Node3 extends< AthAlgTool, IUserActionTool > Node3->Node2 Node4 G4UA::ThreadSpecificUser Action< StepHistogram > - m_threadMap + ~ThreadSpecificUserAction() + get() + set() + begin() + end() + accumulate() Node4->Node2 #m_actions Node5 ServiceHandle< ITHistSvc > Node5->Node1 -m_histSvc Node6 G4UA::StepHistogram ::Config + do2DHistograms + doGeneralHistograms Node6->Node1 -m_config