php-http / HttplugBundle

        $serviceIds = [];

        $httpClient = $config['discovery']['client'];

        if (!empty($httpClient)) {

            if ($httpClient === 'auto') {

                $httpClient = $this->registerAutoDiscoverableClient(

                    $container,

                    'auto_discovered_client',

                    [HttpClientDiscovery::class, 'find']

                );

            }

            $serviceIds[] = $httpClient;

            $httpClient = new Reference($httpClient);

        }

        $asyncHttpClient = $config['discovery']['async_client'];

        if (!empty($asyncHttpClient)) {

        }

        $asyncHttpClient = $config['discovery']['async_client'];

        if (!empty($asyncHttpClient)) {

            if ($asyncHttpClient === 'auto') {

                $asyncHttpClient = $this->registerAutoDiscoverableClient(

                    $container,

                    'auto_discovered_async',

                    [HttpAsyncClientDiscovery::class, 'find']

                );

            }

            $serviceIds[] = $asyncHttpClient;

            $asyncHttpClient = new Reference($httpClient);

        }

        $container->getDefinition('httplug.strategy')

            ->addArgument($httpClient)