def _get_srlb(self):
return self.__srlb<EOL>
Getter method for srlb, mapped from YANG variable /network_instances/network_instance/protocols/protocol/isis/global/segment_routing/state/srlb (leafref)

    YANG Description: A reference to the Segment Routing Local Block (SRLB) that is to
be advertised by the IGP instance.