code: function() {
          if (this.hoverResponse) {
              this.protocol.abort(this.hoverResponse);
              this.hoverResponse = null;
  
              OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
          }
      }
docs: Method: cancelHover
  Callback from the handlers.hover set up when <hover> selection is on