public function handleRequest(\Psr\Http\Message\ServerRequestInterface $request)
    {
        // We define this constant, so that any TYPO3-Extension can check, if the REST-API is running
        define('REST_API_IS_RUNNING', true);

        // Dispatch the API-call
        $objectManager = GeneralUtility::makeInstance(ObjectManager::class);
        $objectManager->get(Dispatcher::class)->dispatch();
    }