// Créer les styles externes
if ($this->getData(['page', $this->getUrl(0), 'css' ])) {
    $stylePath = self::TEMP_DIR . uniqid() . '.css';
    file_put_contents($stylePath, html_entity_decode($this->getData(['page', $this->getUrl(0), 'css'])));
    $this->addOutput([
        'style' => $stylePath
    ]);
}