public function setCountry($country)
    {
        if ($country === null) {
            throw new Klarna_ArgumentNotSetException('Country');
        }
        if (is_numeric($country)) {
            if (!is_int($country)) {
                $country = intval($country);
            }
            $this->country = $country;
            return;
        }
        if (strlen($country) == 2 || strlen($country) == 3) {
            $this->setCountry(KlarnaCountry::fromCode($country));
            return;
        }
        throw new KlarnaException("Failed to set country! ($country)");
    }