public URLClassLoader getOrCreateClassLoader(Set<URL> libraryUrls) {
    URLClassLoader result = myUrls2ClassLoader.get(libraryUrls);
    if (result == null) {
      result = createClassLoaderWithoutApplicationParent(libraryUrls);
      myUrls2ClassLoader.put(libraryUrls, result);
    }
    return result;
  }
public URLClassLoader getOrCreateClassLoader(Set<URL> libraryUrls)