protected function getFileContents($fileName, ResourceLoaderContext $context)
 {
     switch (self::getFileType($fileName)) {
         case self::FILE_TYPE_REGULAR:
             return file_get_contents($fileName);
             break;
         case self::FILE_TYPE_SASS:
             $sass = new SassService($fileName);
             $params = $context->getRequest()->getVal('sass_params');
             $params = !empty($params) ? FormatJson::decode($params, true) : array();
             return $sass->getContents($params);
             break;
     }
 }