I'd think of that, but that would mean that the value of `option.search_match` can be of 3 different types, `null` when `exec` fails, an array with `index` property if `exec` succeeds and `true` [`if option.group_array_index? ...`](https://github.com/koenpunt/chosen/blob/8f8fb8e8d401ef23bea76cb587c5170350dd8a61/coffee/lib/abstract-chosen.coffee#L170-L171). And that I want to avoid.