AbstractBackground.php
This file is part of PHPPresentation - A pure PHP library for reading and writing presentations documents.
PHPPresentation is free software distributed under the terms of the GNU Lesser General Public License version 3 as published by the Free Software Foundation.
For the full copyright and license information, please read the LICENSE file that was distributed with this source code. For the full list of contributors, visit https://github.com/PHPOffice/PHPPresentation/contributors.