private VespaModel buildModel(DeployState deployState) {
        try {
            return new VespaModel(configModelRegistry, deployState);
        } catch (IOException | SAXException e) {
            throw new IllegalArgumentException(e);
        }
    }
Returns the version this model is build for
config-model/src/main/java/com/yahoo/vespa/model/VespaModelFactory.java