LArEM_Base_ID::HashCalc Node1 LArEM_Base_ID::HashCalc + m_etamin + m_phimin + m_nphi + HashCalc() Node2 IdentifierHash - m_value + IdentifierHash() + IdentifierHash() + IdentifierHash() + operator=() + operator=() + ~IdentifierHash() + IdentifierHash() + operator unsigned int() + value() + is_valid() + operator=() + operator+=() + operator-=() Node2->Node1 +m_hash