[WordPress] WooCommerce Integrations with WordPress Namespaces

00-woocommerce-integration.php

<?php

namespace Acme\Inc\Integration;

class Acme_Integration_Bootstrap {

    public function init() {

        if ( class_exists( 'WC_Integration' ) ) {

            include_once 'class-acme-integration.php';

            add_filter(
                'woocommerce_integrations',
                array( $this, 'add_integration' )
            );
        }
    }

    public function add_integration( $integrations ) {

        // Notice that you must provide the fully-qualified class name.
        $integrations[] = 'Acme\\Inc\\Integration\\Acme_Integration';
        return $integrations;
    }
}