newsupernova/vendor/magento/module-braintree/Gateway/Response/RefundHandler.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Braintree\Gateway\Response;

use Magento\Sales\Model\Order\Payment;

class RefundHandler extends VoidHandler
{
    /**
     * Whether parent transaction should be closed
     *
     * @param Payment $orderPayment
     * @return bool
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    protected function shouldCloseParentTransaction(Payment $orderPayment)
    {
        return !(bool)$orderPayment->getCreditmemo()->getInvoice()->canRefund();
    }
}