docs: function () {
              this.$DropDownTextInput._checkCfgConsistency.call(this);
              var opt = this._cfg.options;
              var values = [];
              var dupValues = [];
              var map = {};
  
              for (var count = 0; count < opt.length; count++) {
                  if (map[opt[count].value]) {
                      dupValues.push(opt[count].value);
                  } else {
                      map[opt[count].value] = true;
                      values.push(opt[count]);
                  }
              }
              if (dupValues.length > 0) {
                  this.controller.setListOptions(values);
                  this.$logError(this.DUPLICATE_VALUE, [dupValues]);
              }
  
          }