}

  /**
   * Tests that the use of a {@link FinalizableReferenceQueue} does not subsequently prevent the
   * loader of that class from being garbage-collected.
   */
  @Test
  public void testUnloadable() throws Exception {
    WeakReference<ClassLoader> loaderRef = useFrqInSeparateLoader();
    GcFinalization.awaitClear(loaderRef);
  }

  private URL[] getClassPathUrls() {