MuonML::LayerSpBucket Node1 MuonML::LayerSpBucket - m_nMdtLay - m_nStripLay - m_layNum - m_min - m_max + LayerSpBucket() + nMdtLayers() + nStripLayers() + layerNum() + coveredMax() + coveredMin() Node2 std::vector< T > + elements   Node2->Node1