code: public static Widget findWidget(Element elt) {
          if (elt == null) return null;
          EventListener listener = DOM.getEventListener(elt);
          if (listener == null || !(listener instanceof Widget)) return null;
          return (Widget) listener;
      }
docs: Needed to find out jqm widget by its Element received usually from JavaScript.
  <br> Only loaded (attached to DOM) widgets can be found.