Bug 89137 [JFace] - API Review - "temporary" API in AbstractTreeViewer
AbstractTreeViewer contains two methods documented as "temporary" internalRefresh(Widget, Object) internalAdd(Widget, Object, Object [])
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
}
    /**
     * Fires a tree collapsed event. Only listeners registered at the time this
     * method is called are notified.
     * 
     * @param event
     *           the tree expansion event
     * @see ITreeViewerListener#treeCollapsed
     */
    protected void fireTreeCollapsed(final TreeExpansionEvent event) {
        Object[] listeners = treeListeners.getListeners();
        for (int i = 0; i < listeners.length; ++i) {
            final ITreeViewerListener l = (ITreeViewerListener) listeners[i];
            SafeRunnable.run(new SafeRunnable() {
                public void run() {
                    l.treeCollapsed(event);
                }
            });
        }
    }
    /**
     * Fires a tree expanded event. Only listeners registered at the time this
     * method is called are notified.
     * 
     * @param event
     *           the tree expansion event
     * @see ITreeViewerListener#treeExpanded
     */
    protected void fireTreeExpanded(final TreeExpansionEvent event) {
        Object[] listeners = treeListeners.getListeners();