TrigVertexCounts Node1 TrigVertexCounts + TrigVertexCounts() + TrigVertexCounts() + TrigVertexCounts() + ~TrigVertexCounts() + vtxNtrks() + vtxTrkPtSqSum() Node2 std::vector< float > + elements Node2->Node1 -m_vtxTrkPtSqSum Node3 std::vector< unsigned int > + elements Node3->Node1 -m_vtxNtrks