RuntimeException.php

1. 9.x drupal/core/vendor/guzzle/common/Guzzle/Common/Exception/RuntimeException.php
2. 9.x drupal/core/vendor/symfony/serializer/Symfony/Component/Serializer/Exception/RuntimeException.php
3. 9.x drupal/core/vendor/symfony/process/Symfony/Component/Process/Exception/RuntimeException.php
4. 9.x drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/Exception/RuntimeException.php

<?php

namespace Guzzle\Common\Exception;

class RuntimeException extends \RuntimeException implements GuzzleException {

}