assertFalse(collection.spliterator().hasCharacteristics(Spliterator.IMMUTABLE));
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getSpliteratorNotImmutableCollectionAllowsAddMethod() {
    return Helpers.getMethod(
        CollectionSpliteratorTester.class, "testSpliteratorNotImmutable_collectionAllowsAdd");
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection