Goose\Images\ImageUtils::handleEntity PHP Method

    private static function handleEntity($imageSrcs, $returnAll, $config)
    {
        $guzzle = new \GuzzleHttp\Client();
        $results = [];
        $requests = function ($urls) use($guzzle, $config, &$results) {
            foreach ($urls as $key => $url) {
                $file = tempnam(sys_get_temp_dir(), 'goose');
                $results[] = (object) ['url' => $url, 'file' => $file];
                (yield $key => function ($options) use($guzzle, $url, $file) {
                    $options['sink'] = $file;
                    return $guzzle->sendAsync(new \GuzzleHttp\Psr7\Request('GET', $url), $options);
                });
            }
        };
        $pool = new \GuzzleHttp\Pool($guzzle, $requests($imageSrcs), ['concurrency' => 25, 'fulfilled' => function ($response, $index) use(&$results, $returnAll) {
            if (!$returnAll && $response->getStatusCode() != 200) {
                unset($results[$index]);
            }
        }, 'rejected' => function ($reason, $index) use(&$results, $returnAll) {
            if ($returnAll) {
                $results[$index]->file = null;
            } else {
                unset($results[$index]);
            }
        }, 'options' => $config->get('browser')]);
        $pool->promise()->wait();
        if (empty($results)) {
            return null;
        }
        return $results;
    }