Bug 168888 [Wizards] PageTransition classes may need rename/reorg
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/IPageTransitionListener.java
/**
	 * Notifies that the selected page is changing.  The doit field of the
	 * PageTransitionEvent can be set to false to prevent the page from changing.
	 * 
	 * @param event
	 *            event object describing the change
	 */
	public void pageTransition(PageTransitionEvent event);
}