MdtHitIdHelper Node1 MdtHitIdHelper + GetStationName() + SetStationName() + GetPhiSector() + GetZSector() + GetMultiLayer() + GetLayer() + GetTube() + BuildMdtHitId() + GetHelper() - MdtHitIdHelper() - Initialize() - InitializeStationName() Node2 HitIdHelper # m_IDs # m_currentStorage + HitIdHelper() + ~HitIdHelper() + InitializeField() + InitializeField() + SetFieldValue() + GetFieldValue() + PrintFields() + Print() # SetBit() # UnsetBit() # Store() # Retrieve() Node2->Node1