/**
* Define if asset is not valid.
*
* @param string $asset Full path to asset
*
* @param string $cachedAsset Full path to cached asset
*
* @return bool True if cached asset is valid
*/
protected function isValid($asset, $cachedAsset)
{
// If cached asset does not exists or is invalid
return $this->fileManager->exists($cachedAsset) !== false && $this->fileManager->lastModified($cachedAsset) === $this->fileManager->lastModified($asset);
}
