public function clearAssetCache()
    {
        foreach ($this->cachedFiles as $hash => $fileData) {
            if (!$this->fileBackend->isWritable($fileData['file'])) {
                continue;
            }
        
            $this->fileBackend->deleteFile($fileData['file']);
        }
        
        $this->cachedFiles = array();
        $this->saveAssetsCache();
    }