return bulkBufferSize;
    }

    /**
     * Sets the bulk buffer size for batch operations.
     *
     * @param bulkBufferSize The bulk buffer size.
     */
    public void setBulkBufferSize(final int bulkBufferSize) {
        this.bulkBufferSize = bulkBufferSize;
    }

    /**
     * Sets the number of shards for the OpenSearch index.
     *
     * @param numberOfShards The number of shards.