HttpException.php

1. 8.x drupal/core/vendor/guzzle/http/Guzzle/Http/Exception/HttpException.php
2. 8.x drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Exception/HttpException.php

<?php

namespace Guzzle\Http\Exception;

use Guzzle\Common\Exception\GuzzleException;

/**
 * Http exception interface
 */
interface HttpException extends GuzzleException {

}