public function userAgent($product = self::USER_AGENT, $version = null)
    {
        return $this->handler->userAgent->client($product, $version, $this->statusCode);
    }
public function userAgent($product = self::USER_AGENT, $version = null)
    {
        return $this->handler->userAgent->client($product, $version, $this->statusCode);
    }
public function userAgent ( $ product = self :: USER_AGENT , $ version = null ) { return $ this -> handler -> userAgent -> client ( $ product , $ version , $ this -> statusCode ) ; }
User-agent specific rules

@param string $product
@param float|int|string|null $version
@return UserAgentClient
User - agent specific rules