G4UA::TestActionVPTimer::Report Node1 G4UA::TestActionVPTimer ::Report + nev + runTime + merge() Node2 std::map< VolTree, TestActionVPTimer:: volumeData > Node2->Node1 +time_index Node3 G4UA::TestActionVPTimer ::volumeData + tTotal + tElectron + tPhoton + tNeutron + tPion + tBaryon + tLepton + tMeson + tOther + operator+=() Node3->Node2 +elements Node4 std::vector< T > Node4->Node2 +keys Node5 T Node5->Node4 +elements