docs: function (suggestions, textEntry) {
                  var matchValueIndex = -1, suggestion;
                  for (var index = 0, len = suggestions.length, label, ariaLabel; index < len; index += 1) {
                      suggestion = suggestions[index];
                      // if it's the first exact match, store it
                      if (matchValueIndex == -1) {
                          if (suggestion.exactMatch) {
                              matchValueIndex = index;
                          }
                      }
                      label = this._getLabelFromSuggestion(suggestion);
                      ariaLabel = this.waiSuggestionAriaLabelGetter ? this.waiSuggestionAriaLabelGetter({
                          value: suggestion,
                          index: index,
                          total: len
                      }) : null;
                      var tmp = {
                          entry : textEntry,
                          label : label,
                          ariaLabel : ariaLabel,
                          value : suggestion
                      };
                      suggestions[index] = tmp;
                  }
                  return this.preselect === "none" ? -1 : matchValueIndex;
              }