code: function (style, exportAsString) {
      var self = this;
  
      var result;
      switch (style) {
        case "mongo":
        case "mongodb":
        default:
          var mongoParser = new Backgrid.Extension.AdvancedFilter.FilterParsers.MongoParser();
          result = mongoParser.parse(self);
  
          if (exportAsString) {
            result = self.stringifyFilterJson(result);
          }
      }
      return result;
    }
docs: Export the filter for a given style
  @method exportFilter
  @param {String} style. Values: "(mongo|mongodb), ..."
  @param {boolean} exportAsString exports as a string if true.
  @return {Object}