TrigSpacePointCountsCollection_p4.h Node1 TrigSpacePointCountsCollection_p4.h Node2 TrigInDetEventTPCnv /TrigSpacePointCounts_p4.h Node1->Node2 Node3 TrigInDetEventTPCnv /TrigHisto2D_p1.h Node2->Node3 Node4 vector Node3->Node4