code: function() {
          var me = this,
              cls = me.verticalCls;
  
          delete me.vertical;
          if (cls) {
              delete me.verticalCls;
              me.removeCls(cls);
          }
  
          // delete the inverted methods and revert to inheriting from the prototype 
          delete me.setWidth;
          delete me.setHeight;
          if (!Ext.isIE9m) {
              delete me.getWidth;
              delete me.getHeight;
          }
  
          // revert to inheriting styleHooks from the prototype
          delete me.styleHooks;
      }
docs: Removes "vertical" state from this element (reverses everything done
  by {@link #setVertical}).
  @private