code: function () {
          var items = this.getFilterItems(),
              filters = [],
              n, nlen, item, d, i, len;
  
          for (n = 0, nlen = items.length; n < nlen; n++) {
              item = items[n];
              if (item.active) {
                  d = [].concat(item.serialize());
                  for (i = 0, len = d.length; i < len; i++) {
                      filters.push({
                          field: item.dataIndex,
                          data: d[i]
                      });
                  }
              }
          }
          return filters;
      }
docs: Returns an Array of the currently active filters.
  @return {Array} filters Array of the currently active filters.