woocommerce/includes/data-stores/interfaces/wc-customer-download-data-store-interface.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * WC Customer Download Data Store Interface.
 *
 * @version  2.7.0
 * @category Interface
 * @author   WooThemes
 */
interface WC_Customer_Download_Data_Store_Interface {
}