Bug 29163 SafeRunnable needs to be accessible in JFace
We need to be able to access the SafeRunnable in JFace in order that some error protection can be added to preferences and properties dialogs.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/wizard/WizardSelectionPage.java
* List of wizard nodes that have cropped up in the past
	 * (element type: <code>IWizardNode</code>).
	 */
	private List selectedWizardNodes = new ArrayList();
/**
 * Creates a new wizard selection page with the given name, and
 * with no title or image.
 *
 * @param pageName the name of the page
 */
protected WizardSelectionPage(String pageName) {
	super(pageName);
	
	setPageComplete(false);
}
/**
 * Adds the given wizard node to the list of selected nodes if
 * it is not already in the list.
 *
 * @param node the wizard node, or <code>null</code>
 */
private void addSelectedNode(IWizardNode node) {
	if (node == null)
		return;
	if (selectedWizardNodes.contains(node))
		return;
	
	selectedWizardNodes.add(node);
}
/**