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
IResourceNavigator {
    private TreeViewer viewer;
    private IDialogSettings settings;
    private IMemento memento;
    private FrameList frameList;
    private ResourceNavigatorActionGroup actionGroup;
    private ResourcePatternFilter patternFilter = new ResourcePatternFilter();
    private ResourceWorkingSetFilter workingSetFilter = new ResourceWorkingSetFilter();
    private boolean linkingEnabled;
    private boolean dragDetected;
    private Listener dragDetectListener;
    /**
     * Remembered working set.
     */
    private IWorkingSet workingSet;
    /**
	 * Marks whether the working set we're using is currently empty. In this
	 * event we're effectively not using a working set.
	 */
    private boolean emptyWorkingSet = false;
    
    /**