newsupernova/vendor/magento/module-quote/Model/ResourceModel/Quote/Address/Item/Collection.php

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

/**
 * Quote addresses collection
 *
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Collection extends \Magento\Framework\Model\ResourceModel\Db\VersionControl\Collection
{
    /**
     * Resource initialization
     *
     * @return void
     */
    protected function _construct()
    {
        $this->_init(
            \Magento\Quote\Model\Quote\Address\Item::class,
            \Magento\Quote\Model\ResourceModel\Quote\Address\Item::class
        );
    }

    /**
     * Set parent items
     *
     * @return $this
     */
    protected function _afterLoad()
    {
        parent::_afterLoad();
        /**
         * Assign parent items
         */
        foreach ($this as $item) {
            if ($item->getParentItemId()) {
                $item->setParentItem($this->getItemById($item->getParentItemId()));
            }
        }

        return $this;
    }

    /**
     * Set address filter
     *
     * @param int $addressId
     * @return $this
     */
    public function setAddressFilter($addressId)
    {
        if ($addressId) {
            $this->addFieldToFilter('quote_address_id', $addressId);
        } else {
            $this->_totalRecords = 0;
            $this->_setIsLoaded(true);
        }

        return $this;
    }
}