For assistive tooltips to work correctly we must have the tooltip visible
     * and attached to the DOM well in advance. For this reason both isShowing
     * and isVisible return false positives. We can't override either of them as
     * external code may depend on this behavior.
For assistive tooltips to work correctly we must have the tooltip visible
     * and attached to the DOM well in advance. For this reason both isShowing
     * and isVisible return false positives. We can't override either of them as
     * external code may depend on this behavior. | VTooltip.java