<?php
/**
 *
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Catalog\Controller\Adminhtml\Product;

class Categories extends \Magento\Catalog\Controller\Adminhtml\Product
{
    /**
     * @var \Magento\Framework\View\Result\PageFactory
     */
    protected $resultPageFactory;

    /**
     * @param \Magento\Backend\App\Action\Context $context
     * @param \Magento\Catalog\Controller\Adminhtml\Product\Builder $productBuilder
     * @param \Magento\Framework\View\Result\PageFactory $resultPageFactory
     */
    public function __construct(
        \Magento\Backend\App\Action\Context $context,
        \Magento\Catalog\Controller\Adminhtml\Product\Builder $productBuilder,
        \Magento\Framework\View\Result\PageFactory $resultPageFactory
    ) {
        parent::__construct($context, $productBuilder);
        $this->resultPageFactory = $resultPageFactory;
    }

    /**
     * Get categories fieldset block
     *
     * @return \Magento\Backend\Model\View\Result\Page
     */
    public function execute()
    {
        $this->productBuilder->build($this->getRequest());
        return $this->resultPageFactory->create();
    }
}
