View file core/libs/s3/vendor/composer/installers/src/Composer/Installers/ModxInstaller.php

<?php
namespace Composer\Installers;

/**
 * An installer to handle MODX specifics when installing packages.
 */
class ModxInstaller extends BaseInstaller
{
    protected $locations = array(
        'extra' => 'core/packages/{$name}/'
    );
}