}
    for (URL url : getClassLoaderUrls(classloader)) {
      if (url.getProtocol().equals("file")) {
        File file = toFile(url);
        if (!entries.containsKey(file)) {
          entries.put(file, classloader);
        }
      }
    }
    return ImmutableMap.copyOf(entries);
  }

  private static ImmutableList<URL> getClassLoaderUrls(ClassLoader classloader) {