docs: function () {
                  var freeTxtStatus = false, dataListContent = this._dataModel.listContent;
                  for (var i = 0, len = dataListContent.length; i < len; i += 1) {
                      if (this._dataModel.text === dataListContent[i].value.label) {
                          freeTxtStatus = true;
                          break;
                      }
                  }
                  return freeTxtStatus;
              }