public function getStyleSheetUrls()
{
$stylesheets = array_values(array_map(function ($e) {
return is_array($e) ? $e[0] : $e;
}, $this->_styleSheetFiles));
foreach (Prado::getApplication()->getAssetManager()->getPublished() as $path => $url) {
if (substr($url, strlen($url) - 4) == '.css') {
$stylesheets[] = $url;
}
}
$stylesheets = array_unique($stylesheets);
return $stylesheets;
}