PixelStaveTypes Node1 PixelStaveTypes + PixelStaveTypes() + getFluidType() + getBiStaveType() - getData() Node2 PixelStaveTypes::Datum + fluidType + biStaveType + Datum() Node2->Node1 -s_defaultDatum Node4 std::map< Key, Datum > Node2->Node4 +elements Node3 std::map< int, int > + keys + elements Node3->Node1 -m_maxSector Node4->Node1 -m_dataLookup Node5 PixelStaveTypes::Key + layer + phiModule + Key() + operator<() Node5->Node4 +keys