nexthop_unref
nexthop_unref(state.nexthop);
nexthop_unref(state->nexthop); /* just to be sure */
int nexthop_unref(struct nexthop *);
nexthop_unref(a->nexthop);
nexthop_unref(state->nexthop);
nexthop_unref(rfse->action.nh_ref);
nexthop_unref(p->nexthop);
nexthop_unref(nh);
if (nexthop_unref(nh))
nexthop_unref(*nexthop);
nexthop_unref(state->nexthop);