private static boolean configNameNotFound(final ConfigKey<?> requestKey, Set<ConfigKey<?>> allConfigsProduced) {
        return !Iterables.any(allConfigsProduced, new Predicate<>() {
            @Override
            public boolean apply(ConfigKey<?> k) {
                return k.getName().equals(requestKey.getName()) && k.getNamespace().equals(requestKey.getNamespace());
            }
        });
    }
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