TrigTrtHitCounts_p1 Node1 TrigTrtHitCounts_p1 + TrigTrtHitCounts_p1() + ~TrigTrtHitCounts_p1() 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