newsupernova/vendor/magento/module-sales/Controller/Adminhtml/Shipment/AbstractShipment/Index.php

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

use Magento\Backend\App\Action\Context;
use Magento\Framework\View\Result\PageFactory;

abstract class Index extends \Magento\Backend\App\Action
{
    /**
     * Authorization level of a basic admin session
     *
     * @see _isAllowed()
     */
    const ADMIN_RESOURCE = 'Magento_Sales::shipment';

    /**
     * @var PageFactory
     */
    protected $resultPageFactory;

    /**
     * @param Context $context
     * @param PageFactory $resultPageFactory
     */
    public function __construct(
        Context $context,
        PageFactory $resultPageFactory
    ) {
        parent::__construct($context);
        $this->resultPageFactory = $resultPageFactory;
    }

    /**
     * Shipments grid
     *
     * @return \Magento\Backend\Model\View\Result\Page
     */
    public function execute()
    {
        /** @var \Magento\Backend\Model\View\Result\Page $resultPage */
        $resultPage = $this->resultPageFactory->create();
        $resultPage->setActiveMenu('Magento_Sales::sales_shipment')
            ->addBreadcrumb(__('Sales'), __('Sales'))
            ->addBreadcrumb(__('Shipments'), __('Shipments'));
        $resultPage->getConfig()->getTitle()->prepend(__('Shipments'));

        return $resultPage;
    }
}