DefinitionMap.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Ui\Config\Reader;

use Magento\Framework\Config\ReaderInterface;

/**
 * UI Component definition map config reader
 */
class DefinitionMap extends \Magento\Framework\Config\Reader\Filesystem implements ReaderInterface
{
}