63   ss << "RegisterNotificationPacket: " << std::endl;  in ToString()
64   ss << "  └ cType = " << GetCType() << std::endl;  in ToString()
65   ss << "  └ Subunit Type = " << loghex(GetSubunitType()) << std::endl;  in ToString()
66   ss << "  └ Subunit ID = " << loghex(GetSubunitId()) << std::endl;  in ToString()
67   ss << "  └ OpCode = " << GetOpcode() << std::endl;  in ToString()
68   ss << "  └ Company ID = " << loghex(GetCompanyId()) << std::endl;  in ToString()
69   ss << "  └ Command PDU = " << GetCommandPdu() << std::endl;  in ToString()
70   ss << "  └ PacketType = " << GetPacketType() << std::endl;  in ToString()
71   ss << "  └ Parameter Length = " << GetParameterLength() << std::endl;  in ToString()
72   ss << "  └ Identifier = " << loghex(GetIdentifier()) << std::endl;  in ToString()
76   ss << "  └ Attribute List: Size: " << attr_list.size() << std::endl;  in ToString()
78     ss << "      └ " << loghex((uint32_t)(*it)) << std::endl;  in ToString()
80   ss << std::endl;  in ToString()