def _get_topology_id(self):
return self.__topology_id<EOL>
Getter method for topology_id, mapped from YANG variable /network_instances/network_instance/protocols/protocol/isis/levels/level/link_state_database/lsp/tlvs/tlv/instance_id/state/topology_id (uint16)

YANG Description: Instance-Specific Topology Identifiers (ITIDs).