focusableAreas method
Implementation
Iterable<Node> focusableAreas([FocusableAreasOption? option]) =>
    js_util.callMethod(this, 'focusableAreas', [option]);Iterable<Node> focusableAreas([FocusableAreasOption? option]) =>
    js_util.callMethod(this, 'focusableAreas', [option]);