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
/**
     * Restores the linking enabled state.
     */
    private void restoreLinkingEnabled() {
        Integer val = memento
                .getInteger(IWorkbenchPreferenceConstants.LINK_NAVIGATOR_TO_EDITOR);
        if (val != null) {
            linkingEnabled = val.intValue() != 0;
        }
    }
    /**	
     * @see ViewPart#saveState
     */
    public void saveState(IMemento memento) {
        TreeViewer viewer = getTreeViewer();
        if (viewer == null) {
            if (this.memento != null) {
				memento.putMemento(this.memento);
			}
            return;
        }
        
        memento.putInteger(TAG_SORTER, getSorter().getCriteria());
        
        String filters[] = getPatternFilter().getPatterns();
        List selectedFilters = Arrays.asList(filters);
        List allFilters = FiltersContentProvider.getDefinedFilters();
        IMemento filtersMem = memento.createChild(TAG_FILTERS);
        for (Iterator iter = allFilters.iterator(); iter.hasNext();) {
            String element = (String) iter.next();