Elastica\Transport\AwsAuthV4::_getGuzzleClient PHP Метод

    protected function _getGuzzleClient($baseUrl, $persistent = true)
    {
        if (!$persistent || !self::$_guzzleClientConnection) {
            $stack = HandlerStack::create(GuzzleHttp\choose_handler());
            $stack->push($this->getSigningMiddleware(), 'sign');
            self::$_guzzleClientConnection = new Client(['base_uri' => $baseUrl, 'handler' => $stack]);
        }
        return self::$_guzzleClientConnection;
    }