G4UA::SG_StepNtupleTool Node1 G4UA::SG_StepNtupleTool + SG_StepNtupleTool() # makeAndFillAction() Node2 G4UA::UserActionToolBase < SG_StepNtuple > + UserActionToolBase() + fillUserAction() # makeAndFillAction() Node2->Node1 Node3 extends< AthAlgTool, IUserActionTool > Node3->Node2 Node4 G4UA::ThreadSpecificUser Action< SG_StepNtuple > - m_threadMap + ~ThreadSpecificUserAction() + get() + set() + begin() + end() + accumulate() Node4->Node2 #m_actions Node5 std::vector< int > + elements Node5->Node1 -m_pdgids