* @param method the method to invoke on sibling widget instances
*/
public static void notifyWidgets(HttpSession session, IWidgetInstance instance, String method){
ServletContext ctx = session.getServletContext();
ServerContext sctx = ServerContextFactory.get(ctx);
String currentPage = new SiblingPageNormalizer().getNormalizedPage(instance);
Collection<?> pages = sctx.getScriptSessionsByPage(currentPage);
call(pages,method);
}