Grouping select options

I propose to add a grouping of options in the select
For Example

Select::make('options')
    ->options(Option::all()
    ->groupBy('group_by_key', 'label_to_display')

First argument may be string or closure. Similar to Collection::groupBy https://laravel.com/docs/7.x/collections#method-groupby
If second argument is empty, first will be used as label.

Sou html output will be

   <optgroup label="group_1">
    <option value="c1">option</option>
    <option value="c2">option</option>
    <option value="c3">option</option>
   </optgroup>
   <optgroup label="group_2">
    <option value="s1">option</option>
    <option value="s2">option</option>
    <option value="s3">option</option>
   </optgroup>
   </select>