return ImmutableList.copyOf(elements);
  }

  private static ImmutableList<ListFrobber> ops(ListFrobber... elements) {
    return ImmutableList.copyOf(elements);
  }

  public void testCopyOf_concurrentlyMutatedList() {
    runConcurrentlyMutatedTest(WrapWithIterable.NO_WRAP);
  }

  public void testCopyOf_concurrentlyMutatedIterable() {
    runConcurrentlyMutatedTest(WrapWithIterable.WRAP);
  }