MuonR4::SpacePointPerLayerSplitter Node1 MuonR4::SpacePointPerLayer Splitter - m_nMdtHits - m_nStripHits - m_tubeLaySwitch + SpacePointPerLayerSplitter() + SpacePointPerLayerSplitter() + mdtHits() + nMdtHits() + stripHits() + nStripHits() + firstLayerFrom2ndMl() Node2 std::vector< HitVec > Node2->Node1 -m_mdtLayers -m_stripLayers Node3 std::vector< T > Node3->Node2 +elements Node4 T Node4->Node3 +elements