public static Map<Lang, Result> convert(
     ClassLoader loader, List<Lang> langs, String source, String fqn, String method)
     throws Exception {
   URL url = loader.getResource(source);
   if (url == null) {
     throw new Exception("Cannot resolve source " + source + "");
   }
   String file = new File(url.toURI()).getAbsolutePath();
   return convertFromFiles(loader, langs, file, fqn, method);
 }