public function getCssFiles($controller_id, $template_id)
    {
        $css_files = [];
        $asset_config = $this->getConfigByName('assets');
        if (isset($asset_config[$controller_id][$template_id]['css'])) {
            $css_files = $asset_config[$controller_id][$template_id]['css'];
        }
        return $css_files;
    }