newsupernova/vendor/magento/module-sales/Controller/Adminhtml/Order/Transactions.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Sales\Controller\Adminhtml\Order;

use Magento\Backend\App\Action;

class Transactions extends \Magento\Sales\Controller\Adminhtml\Order
{
    /**
     * Order transactions grid ajax action
     *
     * @return \Magento\Framework\View\Result\Layout
     */
    public function execute()
    {
        $this->_initOrder();
        $resultLayout = $this->resultLayoutFactory->create();
        return $resultLayout;
    }
}