src/StatementClient.php
public function cancelLeafStage(int $timeout = 500000, bool $debug = false): bool
    {
        if (!$this->isClosed()) {
            $cancelUri = $this->current()->getPartialCancelUri();
            if (is_null($cancelUri)) {
                return false;
            }
            $promise = $this->client->deleteAsync($cancelUri, [
                'timeout' => $timeout,
                'debug'   => $debug,
            ]);
            $promise->then(function (ResponseInterface $response) {
                $this->fulfilled = (StatusCodeInterface::STATUS_NO_CONTENT === $response->getStatusCode());
            }, function (RequestException $e) {
                throw new RequestFailedException($e->getMessage(), $e->getCode(), $e);
            });
            $promise->wait();
        }

        return $this->fulfilled;
    }
public function cancelLeafStage(int $timeout = 500000, bool $debug = false): bool
    {
        if (!$this->isClosed()) {
            $cancelUri = $this->current()->getPartialCancelUri();
            if (is_null($cancelUri)) {
                return false;
            }
            $promise = $this->client->deleteAsync($cancelUri, [
                'timeout' => $timeout,
                'debug'   => $debug,
            ]);
            $promise->then(function (ResponseInterface $response) {
                $this->fulfilled = (StatusCodeInterface::STATUS_NO_CONTENT === $response->getStatusCode());
            }, function (RequestException $e) {
                throw new RequestFailedException($e->getMessage(), $e->getCode(), $e);
            });
            $promise->wait();
        }

        return $this->fulfilled;
    }
@param int  $timeout
@param bool $debug

@return bool