static AvahiSRBLookup* lookup_ref(AvahiSRBLookup *l) {
    assert(l);
    assert(l->ref >= 1);

    l->ref++;
    return l;
}
static AvahiSRBLookup* lookup_ref(AvahiSRBLookup *l) {
    assert(l);
    assert(l->ref >= 1);

    l->ref++;
    return l;
}