def _get_metric(self):
return self.__metric<EOL>
Getter method for metric, mapped from YANG variable /network_instances/network_instance/protocols/protocol/isis/levels/level/link_state_database/lsp/tlvs/tlv/is_reachability/neighbors/neighbors/expense_metric/state/metric (oc-isis-types:narrow-metric)

    YANG Description: ISIS expense metric value. This metric measures the monetary cost
of utilising the associated circuit. It is an optional metric, which
if assigned to a circuit shall have a positive integral value1).
Higher values indicate a larger monetary expense.