@dfilatov actually this change is useless by itself as `radio_type_button` is never used without `radio-group` and there's no way to set `mix` for radio 'coz there's nothing about it in `options` template. and to add just `mix` without other `bem`-related fields would be strange I think. should I add `mods`, `cls`, `attrs`, etc as well or just close this PR?