magento-test/app/code/Magento/Multishipping/etc/di.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Quote\Model\Cart\CartTotalRepository">
        <plugin name="multishipping_shipping_addresses" type="Magento\Multishipping\Model\Cart\CartTotalRepositoryPlugin" />
    </type>
    <type name="Magento\Quote\Model\QuoteRepository">
        <plugin name="multishipping_quote_repository" type="Magento\Multishipping\Plugin\MultishippingQuoteRepository" />
    </type>
</config>