G4UA::G4AtlasTrackingAction Node1 G4UA::G4AtlasTrackingAction + G4AtlasTrackingAction() + PreUserTrackingAction() + PostUserTrackingAction() + addTrackAction() Node2 G4UserTrackingAction Node2->Node1 Node3 std::vector< G4UserTracking Action * > + elements Node3->Node1 -m_trackActions