code: function () {
              Event.unsubscribe(Event.POINTERMOVE, this.dragMove);
              Event.unsubscribe(Event.DRAGSTART, this.dragStart);
              Event.unsubscribe(Event.DRAGEND, this.dragEnd);
              this.removePointerEvent("pointerdown", this);
              this.removePointerEvent("pointerup", this);
          }
docs: Destructor
  @name destroy
  @memberOf me.DraggableEntity
  @function