public static Autoscaling empty(String description) {
        return new Autoscaling(Status.unavailable,
                               description,
                               Optional.empty(),
                               Instant.EPOCH,
                               Load.zero(),
                               Load.zero(),
                               Metrics.zero());
    }
Returns true if no measurements was used in creating this instance.
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/Autoscaling.java