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Editing File: /home/maglabs/it/lib/internal/Magento/Framework/Pricing/Price/Factory.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Magento\Framework\Pricing\Price;

use Magento\Framework\Pricing\SaleableInterface;

/**
 * Price factory
 */
class Factory
{
    /**
     * Object Manager
     *
     * @var \Magento\Framework\ObjectManagerInterface
     */
    protected $objectManager;

/**
     * Construct
     *
     * @param \Magento\Framework\ObjectManagerInterface $objectManager
     */
    public function __construct(\Magento\Framework\ObjectManagerInterface $objectManager)
    {
        $this->objectManager = $objectManager;
    }

/**
     * Create Price object for particular product
     *
     * @param SaleableInterface $saleableItem
     * @param string $className
     * @param float $quantity
     * @param array $arguments
     * @throws \InvalidArgumentException
     * @return \Magento\Framework\Pricing\Price\PriceInterface
     */
    public function create(SaleableInterface $saleableItem, $className, $quantity, array $arguments = [])
    {
        $arguments['saleableItem'] = $saleableItem;
        $arguments['quantity'] = $quantity;
        $price = $this->objectManager->create($className, $arguments);
        if (!$price instanceof PriceInterface) {
            throw new \InvalidArgumentException(
                $className . ' doesn\'t implement \Magento\Framework\Pricing\Price\PriceInterface'
            );
        }
        return $price;
    }
}

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