Graphical Class Hierarchy Node0 Trk::ICaloCellSelector Node1 Trk::CaloCellSelectorLayerdR Node0->Node1 Node2 Trk::CaloCellSelectorMinPerp Node0->Node2 Node3 Trk::CaloCellSelectorNearestdR Node0->Node3 Node4 Trk::CaloCellSelectorRoughdR Node0->Node4