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

    YANG Description: An Instance Identifier (IID) to uniquely identify an IS-IS
instance. When the IID = 0, the list of supported ITIDs MUST NOT
be present. An IID-TLV with IID = 0 MUST NOT appear in an SNP or
LSP. When the TLV appears (with a non-zero IID) in an SNP or
LSP, exactly one ITID. MUST be present indicating the topology
with which the PDU is associated. If no ITIDs or multiple ITIDs
are present or the IID is zero, then the PDU MUST be ignored.