TrigTrtHitCounts_p2 Node1 TrigTrtHitCounts_p2 + TrigTrtHitCounts_p2() + ~TrigTrtHitCounts_p2() Node2 TrigHisto1D_p1 + m_nbins_x + m_min_x + m_max_x + TrigHisto1D_p1() Node2->Node1 -m_endcapC -m_barrel -m_endcapA Node3 std::vector< float > + elements Node3->Node2 +m_contents