Kraken\Promise\Promise::getReason PHP Метод

Return rejection or cancellation reason for Promise.

protected getReason ( ) : Erro\Error \| Exceptio\Exception \| string \| null
Результат	Erro\Error \| Exceptio\Exception \| string \| null

    protected function getReason()
    {
        return $this->isRejected() || $this->isCancelled() ? $this->result->getReason() : null;
    }

Promise