private static List<String> withoutCompactableIds(LoadBalancerId id) {
        List<String> ids = new ArrayList<>(2);
        if (!"default".equals(id.cluster().value())) {
            ids.add(id.cluster().value());
        }
        if (!id.application().instance().isDefault()) {
            ids.add(id.application().instance().value());
        }
        return ids;
    }
Returns a list of the non-compactable IDs of given load balancer
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/provisioning/LoadBalancerProvisioner.java