G4StepLimitationTool::PhysicsConstructor Node1 G4StepLimitationTool ::PhysicsConstructor   + ConstructParticle() + ConstructProcess() + IPhysicsContructor() Node2 IPhysicsContructor   + IPhysicsContructor() Node2->Node1 Node3 G4VPhysicsConstructor     Node3->Node2 Node4 AthMessaging - m_msg_tls - ATLAS_THREAD_SAFE + AthMessaging() + AthMessaging() + ~AthMessaging() + msgLvl() + msg() + msg() + setLevel() - AthMessaging() - AthMessaging() - operator=() - initMessaging() Node4->Node2 Node5 std::string     Node5->Node4 -m_nm Node6 std::basic_string< Char >     Node6->Node5 Node7 std::atomic< IMessageSvc * > + ptr   Node7->Node4 -m_imsg Node8 std::atomic< MSG::Level > + ptr   Node8->Node4 -m_lvl