Deferred example

        $maxHostConnections = 0 < $this->maxHostConnections ? $this->maxHostConnections : \PHP_INT_MAX;
        $pool = new DefaultConnectionFactory($connector, $context);
        $pool = ConnectionLimitingPool::byAuthority($maxHostConnections, $pool);

        return $this->clients[$key] = [($this->clientConfigurator)(new PooledHttpClient($pool)), $handleConnector];
    }

    private function handlePush(Request $request, Promise $response, array $options): Promise
    {
        $deferred = new Deferred();
        $authority = $request->getUri()->getAuthority();

        if ($this->maxPendingPushes <= \count($this->pushedResponses[$authority] ?? [])) {
            $fifoUrl = key($this->pushedResponses[$authority]);
            unset($this->pushedResponses[$authority][$fifoUrl]);
            $this->logger?->debug(sprintf('Evicting oldest pushed response: "%s"', $fifoUrl));
        }

        $url = (string) $request->getUri();
        $this->logger?->debug(sprintf('Queueing pushed response: "%s"', $url));
        $this->pushedResponses[$authority][] = [$url, $deferred, $request, $response, [
            

$info['download_content_length'] = -1.0;
        $info['user_data'] = $options['user_data'];
        $info['max_duration'] = $options['max_duration'];
        $info['debug'] = '';

        $onProgress = $options['on_progress'] ?? static function D) {};
        $onProgress = $this->onProgress = static function D) use (&$info, $onProgress) {
            $info['total_time'] = microtime(true) - $info['start_time'];
            $onProgress((int) $info['size_download'], ((int) (1 + $info['download_content_length']) ?: 1) - 1, (array) $info);
        };

        $pauseDeferred = new Deferred();
        $pause = new Success();

        $throttleWatcher = null;

        $this->id = $id = self::$nextId++;
        Loop::defer(static function D) use ($request, $multi, $id, &$info, &$headers, $canceller, &$options, $onProgress, &$handle, $logger, &$pause) {
            return new Coroutine(self::generateResponse($request, $multi, $id, $info, $headers, $canceller, $options, $onProgress, $handle, $logger, $pause));
        });

        $info['pause_handler'] = static function Dfloat $duration) use (&$throttleWatcher, &$pauseDeferred, &$pause) {
            if (null !== $throttleWatcher) {