protected Optional<Admin> getAdmin() {
        var parent = getParent();
        if (parent != null) {
            var r = parent.getRoot();
            if (r instanceof VespaModel model) {
                return Optional.ofNullable(model.getAdmin());
            }
        }
        return Optional.empty();
    }
The zone this is deployed in, or the default zone if not on hosted Vespa
config-model/src/main/java/com/yahoo/vespa/model/container/ContainerCluster.java