code: public static JQMPage findPage(Element elt) {
          if (elt == null) return null;
          Widget w = JQMCommon.findWidget(elt);
          return w instanceof JQMPage ? (JQMPage) w : null;
      }
docs: Needed to find out JQMPage widget by its Element received usually from JavaScript.
  <br> Only loaded (attached to DOM) pages can be found.