newsupernova/vendor/magento/module-quote/Model/GuestCart/GuestCartRepository.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Quote\Model\GuestCart;

use Magento\Quote\Api\GuestCartRepositoryInterface;
use Magento\Quote\Model\QuoteIdMask;
use Magento\Quote\Api\CartRepositoryInterface;
use Magento\Quote\Model\QuoteIdMaskFactory;

/**
 * Cart Repository class for guest carts.
 */
class GuestCartRepository implements GuestCartRepositoryInterface
{
    /**
     * @var QuoteIdMaskFactory
     */
    protected $quoteIdMaskFactory;

    /**
     * @var CartRepositoryInterface
     */
    protected $quoteRepository;

    /**
     * Initialize dependencies.
     *
     * @param CartRepositoryInterface $quoteRepository
     * @param QuoteIdMaskFactory $quoteIdMaskFactory
     */
    public function __construct(
        CartRepositoryInterface $quoteRepository,
        QuoteIdMaskFactory $quoteIdMaskFactory
    ) {
        $this->quoteIdMaskFactory = $quoteIdMaskFactory;
        $this->quoteRepository = $quoteRepository;
    }

    /**
     * {@inheritdoc}
     */
    public function get($cartId)
    {
        /** @var $quoteIdMask QuoteIdMask */
        $quoteIdMask = $this->quoteIdMaskFactory->create()->load($cartId, 'masked_id');
        return $this->quoteRepository->get($quoteIdMask->getQuoteId());
    }
}