Graphical Class Hierarchy Node0 Trk::TrkBaseNode Node1 Trk::TrkFilteringNode1D Node0->Node1 Node5 Trk::TrkFilteringNode2D Node0->Node5 Node2 Trk::TrkClusterNode Node1->Node2 Node3 Trk::TrkEndCapClusterNode Node1->Node3 Node4 Trk::TrkTrtNode Node1->Node4 Node6 Trk::TrkPixelNode Node5->Node6