public void testDecoupledLoader() {
    FinalizableReferenceQueue.DecoupledLoader decoupledLoader =
        new FinalizableReferenceQueue.DecoupledLoader() {
          @Override
          URLClassLoader newLoader(URL base) {
            return new DecoupledClassLoader(new URL[] {base});
          }
        };

    Class<?> finalizerCopy = decoupledLoader.loadFinalizer();

    assertThat(finalizerCopy).isNotNull();

  /** Reference to Finalizer.startFinalizer(). */
  private static final Method startFinalizer;

  static {
    Class<?> finalizer =
        loadFinalizer(new SystemLoader(), new DecoupledLoader(), new DirectLoader());
    startFinalizer = getStartFinalizer(finalizer);
  }

  /** The actual reference queue that our background thread will poll. */
  final ReferenceQueue<Object> queue;