code: function (indices) {
              if (indices == null) {
                  indices = this.getHighlight();
              } else if (!ariaUtilsType.isArray(indices)) {
                  indices = [indices];
              }
  
              var suggestionContainer = this._getSuggestionsContainer();
              for (var k = 0; k < indices.length; k++) {
                  var suggestionNode = suggestionContainer.children[indices[k] - 1];
                  if (suggestionNode) {
                      this.unhighlightOption(suggestionNode);
                  }
              }
          }
docs: Highlighting management --------------------------------------------- 
  To remove the highlight class from the suggestion(s)
  @param {Array|Integer} indices It can be an array of indices of suggestions or an index of suggestion. If
  nothing is provided it will remove the highlight class from all the highlighted suggestions. Indexing starts
  with 1.
  @public