Bug 110169 [Navigator] ResourceNavigator.initWorkingSetFilter should be protected visibility.
The above mentioned method seems mistakingly have an incorrect visibility. E.g. the method initResourceSorter is protected. I don't see why initResourceSorter is not protected.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/ResourceNavigator.java
* 
     * @since 2.0
     */
    protected FrameList createFrameList() {
        NavigatorFrameSource frameSource = new NavigatorFrameSource(this);
        FrameList frameList = new FrameList(frameSource);
        frameSource.connectTo(frameList);
        return frameList;
    }
    /**
     * Initializes the sorter.
     */
    protected void initResourceSorter() {
        int sortType = ResourceSorter.NAME;
        try {
            int sortInt = 0;
            if (memento != null) {
                String sortStr = memento.getString(TAG_SORTER);
                if (sortStr != null) {
					sortInt = new Integer(sortStr).intValue();
				}
            } else {
                sortInt = settings.getInt(STORE_SORT_TYPE);
            }
            if (sortInt == ResourceSorter.NAME
                    || sortInt == ResourceSorter.TYPE) {
				sortType = sortInt;
			}
        } catch (NumberFormatException e) {
        }