public function getMergedStylesheet()
    {
        $mergedAsset = $this->getMergedStylesheetAsset();

        $assetFetcher = new StylesheetUIAssetFetcher(Manager::getInstance()->getLoadedPluginsName(), $this->theme);

        $assetMerger = new StylesheetUIAssetMerger($mergedAsset, $assetFetcher, $this->cacheBuster);

        $assetMerger->generateFile();

        return $mergedAsset;
    }