rejectionFor example

    private function onRejected(RequestInterface $req, array $options): callable
    {
        return function D$reason) use ($req, $options) {
            if (!($this->decider)(
                $options['retries'],
                $req,
                null,
                $reason
            )) {
                return P\Create::rejectionFor($reason);
            }

            return $this->doRetry($req, $options);
        };
    }

    private function doRetry(RequestInterface $request, array $options, ResponseInterface $response = null): PromiseInterface
    {
        $options['delay'] = ($this->delay)(++$options['retries'], $response, $request);

        return $this($request, $options);
    }

private static function createRejection(EasyHandle $easy, array $ctx): PromiseInterface
    {
        static $connectionErrors = [
            \CURLE_OPERATION_TIMEOUTED => true,
            \CURLE_COULDNT_RESOLVE_HOST => true,
            \CURLE_COULDNT_CONNECT => true,
            \CURLE_SSL_CONNECT_ERROR => true,
            \CURLE_GOT_NOTHING => true,
        ];

        if ($easy->createResponseException) {
            return P\Create::rejectionFor(
                new RequestException(
                    'An error was encountered while creating the response',
                    $easy->request,
                    $easy->response,
                    $easy->createResponseException,
                    $ctx
                )
            );
        }

        // If an exception was encountered during the onHeaders event, then

 catch (\Exception $e) {
                $msg = 'An error was encountered during the on_headers event';
                $response = new RequestException($msg, $request, $response, $e);
            }
        }

        if (\is_callable($response)) {
            $response = $response($request, $options);
        }

        $response = $response instanceof \Throwable
            ? P\Create::rejectionFor($response)
            : P\Create::promiseFor($response);

        return $response->then(
            function D?ResponseInterface $value) use ($request, $options) {
                $this->invokeStats($request, $options, $value);
                if ($this->onFulfilled) {
                    ($this->onFulfilled)($value);
                }

                if ($value !== null && isset($options['sink'])) {
                    $contents = (string) $value->getBody();
                    

    private function transfer(RequestInterface $request, array $options): PromiseInterface
    {
        $request = $this->applyOptions($request, $options);
        /** @var HandlerStack $handler */
        $handler = $options['handler'];

        try {
            return P\Create::promiseFor($handler($request, $options));
        } catch (\Exception $e) {
            return P\Create::rejectionFor($e);
        }
    }

    /** * Applies the array of request options to a request. */
    private function applyOptions(RequestInterface $request, array &$options): RequestInterface
    {
        $modify = [
            'set_headers' => [],
        ];

        

        // Return a fulfilled promise and immediately invoke any callbacks.         if ($this->state === self::FULFILLED) {
            $promise = Create::promiseFor($this->result);

            return $onFulfilled ? $promise->then($onFulfilled) : $promise;
        }

        // It's either cancelled or rejected, so return a rejected promise         // and immediately invoke any callbacks.         $rejection = Create::rejectionFor($this->result);

        return $onRejected ? $rejection->then(null, $onRejected) : $rejection;
    }

    public function otherwise(callable $onRejected): PromiseInterface
    {
        return $this->then(null, $onRejected);
    }

    public function wait(bool $unwrap = true)
    {
        

            if (false !== \strpos($message, 'getaddrinfo') // DNS lookup failed                 || false !== \strpos($message, 'Connection refused')
                || false !== \strpos($message, "couldn't connect to host") // error on HHVM                 || false !== \strpos($message, 'connection attempt failed')
            ) {
                $e = new ConnectException($e->getMessage(), $request, $e);
            } else {
                $e = RequestException::wrapException($request, $e);
            }
            $this->invokeStats($options, $request, $startTime, null, $e);

            return P\Create::rejectionFor($e);
        }
    }

    private function invokeStats(
        array $options,
        RequestInterface $request,
        ?float $startTime,
        ResponseInterface $response = null,
        \Throwable $error = null
    ): void {
        if (isset($options['on_stats'])) {
            

return $value;
                    },
                    static function D$reason) use ($request, &$container, $options) {
                        $container[] = [
                            'request' => $request,
                            'response' => null,
                            'error' => $reason,
                            'options' => $options,
                        ];

                        return P\Create::rejectionFor($reason);
                    }
                );
            };
        };
    }

    /** * Middleware that invokes a callback before and after sending a request. * * The provided listener cannot modify or alter the response. It simply * "taps" into the chain to be notified before returning the promise. The * before listener accepts a request and options array, and the after * listener accepts a request, options array, and response promise. * * @param callable $before Function to invoke before forwarding the request. * @param callable $after Function invoked after forwarding. * * @return callable Returns a function that accepts the next handler. */