if (synonymLoader.getSynonymMap() == null) {
            if (settings.getAsList("synonyms", null) != null) {
                logger.warn("synonyms values are empty.");
            } else if (settings.get("synonyms_path") != null) {
                logger.warn("synonyms_path[{}] is empty.", settings.get("synonyms_path"));
            } else {

        Holder(Model model) {
            this.model = Objects.requireNonNull(model);
            this.set = true;
        }

        public static Model deref(Holder holder) {
            return holder != null ? holder.get() : null;
        }

        public Model get() {
            if (!set) {
                synchronized (this) {
                    if (!set) {
                        try {

        versioning.setLastUpdatedTimestamp(timestamp);

        if (recessive.getVersioning() != null) {
            if (versioning.getLatest() == null) {
                versioning.setLatest(recessive.getVersioning().getLatest());
            }
            if (versioning.getRelease() == null) {
                versioning.setRelease(recessive.getVersioning().getRelease());
            }

        doUpdate(entity, null);
    }

    public void insertOrUpdate(ClickLog entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(ClickLog entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    public void delete(ClickLog entity) {

        doUpdate(entity, null);
    }

    public void insertOrUpdate(Group entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(Group entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    public void delete(Group entity) {

        doUpdate(entity, null);
    }

    public void insertOrUpdate(AccessToken entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(AccessToken entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    public void delete(AccessToken entity) {

        doUpdate(entity, null);
    }

    public void insertOrUpdate(DuplicateHost entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(DuplicateHost entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

        doUpdate(entity, null);
    }

    public void insertOrUpdate(ElevateWord entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(ElevateWord entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    public void delete(ElevateWord entity) {

        doUpdate(entity, null);
    }

    public void insertOrUpdate(KeyMatch entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(KeyMatch entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    public void delete(KeyMatch entity) {

        doUpdate(entity, null);
    }

    public void insertOrUpdate(RequestHeader entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(RequestHeader entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }