iterator.remove();
        return previous;
    }

    private class RealizedElementListIterator extends RealizedElementCollectionIterator implements ListIterator<T> {
        T previous;
        int listNextIndex = 0;
        int listPreviousIndex = -1;

        RealizedElementListIterator(List<Element<T>> backingList, Spec<ValuePointer<?>> acceptanceSpec) {
            super(backingList, acceptanceSpec);