If we configured an EIGRP stub router so that it only advertises connected and summary routes.
But we also want to have an exception to this rule then we can configure a leak-map. For example:
R4(config-if)#router eigrp 1
R4(config-router)#eigrp stub
R4(config)#ip access-list standard R4_L0opback0
R4(config-std-nacl)#permit host 4.4.4.4
R4(config)#route-map R4_L0opback0_LEAKMAP
R4(config-route-map)#match ip address R4_L0opback0
R4(config)#router eigrp 1
R4(config-router)#eigrp stub leak-map R4_L0opback0_LEAKMAP
As we can see the leak-map feature goes long with 'eigrp stub' command.