code: function (record) {
          var val = record.get(this.dataIndex),
              values = this.getValue(),
              isNumber = Ext.isNumber;
          if (isNumber(values.eq) && val != values.eq) {
              return false;
          }
          if (isNumber(values.lt) && val >= values.lt) {
              return false;
          }
          if (isNumber(values.gt) && val <= values.gt) {
              return false;
          }
          return true;
      }
docs: Template method that is to validate the provided Ext.data.Record
  against the filters configuration.
  @param {Ext.data.Record} record The record to validate
  @return {Boolean} true if the record is valid within the bounds
  of the filter, false otherwise.