define(
    [
        'Magento_Checkout/js/view/payment/default'
    ],
    function (Component) {
        'use strict';
        return Component.extend({
            defaults: {
                template: '%path to template%'
            },
            // add required logic here
        });
    }
);

//file <magento root>/vendor/magento/module-paypal/view/frontend/web/js/view/payment/method-renderer/payflow-express.js
/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */
/*browser:true*/
/*global define*/
define(
    [
        'Magento_Paypal/js/view/payment/method-renderer/paypal-express-abstract'
    ],
    function (Component) {
        'use strict';

        return Component.extend({
            defaults: {
                template: 'Magento_Paypal/payment/payflow-express'
            }
        });
    }
);