Bug 126507 [CommonNavigator] [Java] Proposed Java extension for Common Navigator
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerContentProvider.java
* Method declared on IElementChangedListener.
	 */
	public void elementChanged(final ElementChangedEvent event) {
		try {
			 
			
			if (inputDeleted())
				return;
			processDelta(event.getDelta());
		} catch(JavaModelException e) {
			JavaPlugin.log(e);
		}
	}
	private boolean inputDeleted() {
		if (fInput == null)
			return false;
		if ((fInput instanceof IJavaElement) && ((IJavaElement) fInput).exists())
			return false;
		if ((fInput instanceof IResource) && ((IResource) fInput).exists())
			return false;
		if (fInput instanceof WorkingSetModel)
			return false;
		postRefresh(fInput, ORIGINAL, fInput);
		return true;
	}
	/* (non-Javadoc)
	 * Method declared on IContentProvider.
	 */
	public void dispose() {
		super.dispose();