Bug 31683 Show In doesn't work for class file in rt.jar
I20030611 - create Test project that uses Jar container - open NumberFormat.class - activate Show In... and choose Package Explorer Observe: NumberFormat.class doesn't get revealed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerContentProvider.java
IJavaElementDelta[] affectedChildren= delta.getAffectedChildren();
		for (int i= 0; i < affectedChildren.length; i++) 
			return findAddedElement(affectedChildren[i]);
			
		return null;
	}
	/**
	 * Refreshes the Compilation unit corresponding to the workging copy
	 * @param iWorkingCopy
	 */
	private void refreshWorkingCopy(IWorkingCopy workingCopy) {
		IJavaElement original= workingCopy.getOriginalElement();
		if (original != null)
			postRefresh(original, false);
	}
	private boolean isWorkingCopy(IJavaElement element) {
		return (element instanceof IWorkingCopy) && ((IWorkingCopy)element).isWorkingCopy();
	}
	
	/**
	 * Updates the package icon
	 */
	 private void postUpdateIcon(final IJavaElement element) {
	 	postRunnable(new Runnable() {
			public void run() {
				
				Control ctrl= fViewer.getControl();
				if (ctrl != null && !ctrl.isDisposed()) 
					fViewer.update(element, new String[]{IBasicPropertyConstants.P_IMAGE});