docs: function updateDragger(isDraggable) {
          if (isDraggable) {
              if (!dragger) {
                  $el.addClass(CSS_CLASS_DRAGGABLE);
                  dragger = scope.createComponent('dragger');
                  dragger.init(config.$viewport);
              }
          } else {
              if (dragger) {
                  $el.removeClass(CSS_CLASS_DRAGGABLE);
                  scope.destroyComponent(dragger);
                  dragger = null;
              }
          }
      }