vendor/omnipay/common/src/Omnipay/Common/ItemBag.php

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<?php
/**
 * Cart Item Bag
 */

namespace Omnipay\Common;

/**
 * Cart Item Bag
 *
 * This class defines a bag (multi element set or array) of single cart items
 * in the Omnipay system.
 *
 * @see Item
 */
class ItemBag implements \IteratorAggregate, \Countable
{
    /**
     * Item storage
     *
     * @see Item
     *
     * @var array
     */
    protected $items;

    /**
     * Constructor
     *
     * @param array $items An array of items
     */
    public function __construct(array $items = array())
    {
        $this->replace($items);
    }

    /**
     * Return all the items
     *
     * @see Item
     *
     * @return array An array of items
     */
    public function all()
    {
        return $this->items;
    }

    /**
     * Replace the contents of this bag with the specified items
     *
     * @see Item
     *
     * @param array $items An array of items
     */
    public function replace(array $items = array())
    {
        $this->items = array();

        foreach ($items as $item) {