private function invokeWaitList()
    {
        $waitList = $this->waitList;
        $this->waitList = null;
        foreach ($waitList as $result) {
            while (\true) {
                $result->waitIfPending();
                if ($result->result instanceof \YoastSEO_Vendor\GuzzleHttp\Promise\Promise) {
                    $result = $result->result;
                } else {
                    if ($result->result instanceof \YoastSEO_Vendor\GuzzleHttp\Promise\PromiseInterface) {
                        $result->result->wait(\false);
                    }
                    break;
                }
            }
        }
    }