code: function() {
          this.sliderEvents.un({
              "touchstart": this.zoomBarDown,
              "touchmove": this.zoomBarDrag,
              "touchend": this.zoomBarUp,
              "mousedown": this.zoomBarDown,
              "mousemove": this.zoomBarDrag,
              "mouseup": this.zoomBarUp
          });
          this.sliderEvents.destroy();
          
          this.div.removeChild(this.zoombarDiv);
          this.zoombarDiv = null;
          this.div.removeChild(this.slider);
          this.slider = null;
          
          this.map.events.unregister("zoomend", this, this.moveZoomBar);
      }
docs: Method: _removeZoomBar