protected function _getCssOutput(array $options, $url)
    {
        if ($options['rel'] === 'import') {
            return $this->formatTemplate('style', [
                'attrs'   => $this->templater()->formatAttributes($options, ['rel', 'block', 'weight', 'alias']),
                'content' => '@import url(' . $url . ');',
            ]);
        }

        return $this->formatTemplate('css', [
            'rel'   => $options['rel'],
            'url'   => $url,
            'attrs' => $this->templater()->formatAttributes($options, ['rel', 'block', 'weight', 'alias']),
        ]);
    }