protected function resolveRequestHandler(): RequestHandlerInterface
    {
        if ($this->preselectedRequestHandlerClassName !== null && isset($this->requestHandlers[$this->preselectedRequestHandlerClassName])) {
            /** @var RequestHandlerInterface $requestHandler */
            $requestHandler = $this->requestHandlers[$this->preselectedRequestHandlerClassName];
            if ($requestHandler->canHandleRequest()) {
                return $requestHandler;
            }
        }

        /** @var RequestHandlerInterface $requestHandler */
        foreach ($this->requestHandlers as $requestHandler) {
            if ($requestHandler->canHandleRequest() > 0) {
                $priority = $requestHandler->getPriority();
                if (isset($suitableRequestHandlers[$priority])) {
                    throw new FlowException('More than one request handler with the same priority can handle the request, but only one handler may be active at a time!', 1176475350);
                }
                $suitableRequestHandlers[$priority] = $requestHandler;
            }
        }
        if (empty($suitableRequestHandlers)) {
            throw new FlowException('No suitable request handler could be found for the current request. This is most likely a setup-problem, so please check your composer.json and/or try removing Configuration/PackageStates.php', 1464882543);
        }
        ksort($suitableRequestHandlers);
        return array_pop($suitableRequestHandlers);
    }