public static Tuple2<String, String> nameAndNamespace(String nsDotName) {
        Tuple2<String, String> ret = ConfigUtils.getNameAndNamespaceFromString(nsDotName);
        if ("".equals(ret.second)) throw new IllegalArgumentException("Illegal config, must be of form namespace.name.");
        return ret;
    }
If the given config is produced by the model at all

@return ok or not
configserver/src/main/java/com/yahoo/vespa/config/server/http/HttpConfigRequest.java