@Override
    public String toString() { return "allocated to " + owner + " as '" + clusterMembership + "'"; }
Returns a copy of this allocation where removable and reusable are set to the given values. A node which is
reusable may be moved directly to {@link com.yahoo.vespa.hosted.provision.Node.State#dirty} after removal.
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/node/Allocation.java