public function ordersGet($id, $by = 'externalId', $site = null)
    {
        $this->checkIdParameter($by);

        /* @noinspection PhpUndefinedMethodInspection */
        return $this->client->makeRequest(
            "/orders/$id",
            "GET",
            $this->fillSite($site, ['by' => $by])
        );
    }