LArOnlID_Exception Node1 LArOnlID_Exception - m_code + LArOnlID_Exception() + LArOnlID_Exception() + message() + message() + code() + code() + operator std::string() + ~LArOnlID_Exception() Node2 std::string Node2->Node1 -m_message Node3 std::basic_string< char > Node3->Node2