Bug 98107 [Viewers] Change visibility of AbstractTreeViewer#internalRemove from private to protected
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
* @param element
     *           the element
     */
    protected abstract void doUpdateItem(Item item, Object element);
    
    protected void doUpdateItem(Widget widget, Object element, boolean fullMap) {
        if (widget instanceof Item) {
            Item item = (Item) widget;
            
            if (fullMap) {
                associate(element, item);
            } else {
                item.setData(element);
                mapElement(element, item);
            }
            
            SafeRunnable.run(new UpdateItemSafeRunnable(item, element));
        }
    }
    /**
     * Expands all nodes of the viewer's tree, starting with the root. This
     * method is equivalent to <code>expandToLevel(ALL_LEVELS)</code>.
     */
    public void expandAll() {
        expandToLevel(ALL_LEVELS);
    }
    /**
     * Expands the root of the viewer's tree to the given level.
     * 
     * @param level