private static boolean configIdNotFound(RequestHandler requestHandler, ConfigKey<?> requestKey, ApplicationId appId) {
      return !requestHandler.allConfigIds(appId, Optional.empty()).contains(requestKey.getConfigId());
    }
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