/**
  * Returns style tag for custom files
  *
  * @return string
  */
 function get_style_custom($files, $embed_to_html = false)
 {
     if (count($files)) {
         if ($embed_to_html) {
             return $this->minify_helpers->get_minified_content_for_files($files, 'css');
         } else {
             $url = $this->minify_helpers->get_minify_url_for_files($files, 'css');
             if (!is_null($url)) {
                 return $this->get_style($url, false, false);
             }
         }
     }
     return '';
 }