access-integration-interface.php

<?php 

/**
 * What I am trying to do is access the IntegrationInterface from
 * WooCommerce-Blocks
 * Documentation on IntegrationInterface: 
 * https://github.com/woocommerce/woocommerce-blocks/blob/50f9b3e8d012f425d318908cc13d9c601d97bd68/docs/extensibility/integration-interface.md
 *
 *
 * It is an interface which allows for certain files to be loaded in a 
 * certain order to allow for addition into the WC Blocks web page. 
 *
 * My problem is I have the following and I STILL cannot access it.  
 * I am getting the error:
 *
 *
 * Uncaught Error: Class 'Automattic\WooCommerce\Blocks\Integrations\IntegrationInterface' not found
 * 
 */



require_once( ABSPATH . 'wp-content/plugins/woocommerce-blocks/src/Integrations/IntegrationInterface.php');

class WooCommerce_Example_Plugin_Integration extends IntegrationInterface {
	public function get_name() {
		return 'woocommerce-example-plugin';
	}

}