yii2-swiftmailer/framework/base/Exception.php

<?php
/**
 * Exception class file.
 *
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\base;

/**
 * Exception represents a generic exception for all purposes.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class Exception extends \Exception
{
}