Explanation
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.