code: function() {
          this.$main.removeClass(defaultClass + ' ' + this.options.customClass)
              .find(':checkbox').bizCheckbox('destroy')
              .find('button').bizButton('destroy');
  
          this.$main
              .off('click.bizTransferSelectAll')
              .off('click.bizTransferSelectOne')
              .off('click.bizTransferMoveRight')
              .off('click.bizTransferMoveLeft');
  
          this.$main.empty();
  
          this.$main.data(dataKey, null);
      }
docs: 销毁