magento-test/lib/web/css/docs/source/_lib.less

// /**
//  * Copyright © Magento, Inc. All rights reserved.
//  * See COPYING.txt for license details.
//  */

//  #  Including Magento UI library to your theme
//
//  The _lib.less file contains the includes of all Magento UI library files. To use Magento UI library in your theme add the following directive to the theme’s styles.less:
//  ```css
//  @import 'source/lib/_lib';
//  ```
//  The lib.less file is designed to avoid manual adding of each Magento UI library file import instruction to your theme.