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
&& newValue == workingSet) {
				if (workingSet.isAggregateWorkingSet() && workingSet.isEmpty()) {
					
					if (!emptyWorkingSet) {
						emptyWorkingSet = true;
						workingSetFilter.setWorkingSet(null);
					}
				} else {
					
					
					if (emptyWorkingSet) {
					    emptyWorkingSet = false;
						workingSetFilter.setWorkingSet(workingSet);
					}
				}
				getViewer().refresh();
            }
        }
    };
    /**
     * Constructs a new resource navigator view.
     */
    public ResourceNavigator() {
        IDialogSettings viewsSettings = getPlugin().getDialogSettings();
        settings = viewsSettings.getSection(STORE_SECTION);
        if (settings == null) {
            settings = viewsSettings.addNewSection(STORE_SECTION);
            migrateDialogSettings();
        }
        initLinkingEnabled();