private static <T> List<T> concat(List<T> list1, List<T> list2) {
        return Stream.concat(list1.stream(), list2.stream()).toList();
    }
Non-exclusive app first, then an exclusive: Should give the same result as above
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/provisioning/VirtualNodeProvisioningTest.java