Reader.php

<?php
/**
 * Customer address format configuration filesystem loader.
 *
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Customer\Model\Address\Config;

class Reader extends \Magento\Framework\Config\Reader\Filesystem
{
    /**
     * @param \Magento\Framework\Config\FileResolverInterface $fileResolver
     * @param Converter $converter
     * @param SchemaLocator $schemaLocator
     * @param \Magento\Framework\Config\ValidationStateInterface $validationState
     */
    public function __construct(
        \Magento\Framework\Config\FileResolverInterface $fileResolver,
        Converter $converter,
        SchemaLocator $schemaLocator,
        \Magento\Framework\Config\ValidationStateInterface $validationState
    ) {
        parent::__construct(
            $fileResolver,
            $converter,
            $schemaLocator,
            $validationState,
            'address_formats.xml',
            ['/config/format' => 'code']
        );
    }
}