docs: function (selectedValues) {
              var toDisplay = this._fieldDisplay, options = this._dataModel.listContent;
              var backUp = (this._fieldDisplay == 'value') ? 'label' : 'value';
  
              var display = [], option;
              for (var i = 0, l = selectedValues.length; i < l; i++) {
                  option = selectedValues[i];
                  for (var j = 0, l2 = options.length; j < l2; j++) {
                      if (options[j].value == option) {
                          display.push(options[j][toDisplay] ? options[j][toDisplay] : options[j][backUp]);
                      }
                  }
  
              }
              return display.join(this._separator);
          }