Bug 126507 [CommonNavigator] [Java] Proposed Java extension for Common Navigator
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/workingsets/ViewActionGroup.java
public static final int SHOW_PROJECTS= 1;
	public static final int SHOW_WORKING_SETS= 2;
	public static final String MODE_CHANGED= ViewActionGroup.class.getName() + ".mode_changed"; 
	
	private static final Integer INT_SHOW_PROJECTS= new Integer(SHOW_PROJECTS);
	private static final Integer INT_SHOW_WORKING_SETS= new Integer(SHOW_WORKING_SETS);
	
	private IPropertyChangeListener fChangeListener;
	
	private int fMode;
	private IMenuManager fMenuManager;
	private IWorkingSetActionGroup fActiveActionGroup;
	private WorkingSetShowActionGroup fShowActionGroup;
	private WorkingSetFilterActionGroup fFilterActionGroup;
	public ViewActionGroup(int mode, IPropertyChangeListener changeListener, IWorkbenchPartSite site) {
		fChangeListener= changeListener;
		fFilterActionGroup= new WorkingSetFilterActionGroup(site, changeListener);