@Override public String getAriaExpandedState(Element element) { return State.EXPANDED.get(element); }
@Override public void removeAriaExpandedState(Element element) { State.EXPANDED.remove(element); }
@Override public void setAriaExpandedState(Element element, BooleanAndUndefined value) { State.EXPANDED.set(element, value); }
@Override public void setAriaExpandedState(Element element, ExpandedValue value) { State.EXPANDED.set(element, value); }