Bug 127861 [DataBinding] Mark API provisional
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/updatables/EmptyReadableSet.java
*/
	public static EmptyReadableSet getInstance() {
		if (instance == null) {
			instance = new EmptyReadableSet();
		}
		return instance;
	}
	
	public void addChangeListener(IChangeListener changeListener) {
	}
	
	public void dispose() {
	}
	
	public boolean isDisposed() {
		return false;
	}
	
	public boolean isStale() {
		return false;
	}
	
	public void removeChangeListener(IChangeListener changeListener) {
	}
	
	public Collection toCollection() {
		return Collections.EMPTY_SET;
	}
}