'searchable()' for complex 'Coloumn::callback' functions.

I am using these queries. But searchable is not working. Can I see examples or docs?

Column::callback(['id', 'brand'], function ($id) {

  $file = File::findOrFail($id);
  return $file->brand.' '.$file->engine.' '.$file->vehicle()->TORQUE_standard;
                
})->label('Vehicle')->searchable(),

Column::callback('stages', function($stages){
               
                if(\App\Models\Service::where('name', $stages)->first()){
                    return '<img alt="{{$file->stages}}" width="33" height="33" data-src-retina="'. url("icons").'/'.\App\Models\Service::where('name', $stages)->first()->icon .'" data-src="'.url('icons').'/'.\App\Models\Service::where('name', $stages)->first()->icon.'" src="'.url('icons').'/'.\App\Models\Service::where('name', $stages)->first()->icon.'">
                                        <span class="text-black" style="top: 2px; position:relative;">'.$stages.'</span>';
                }
            })
            ->label('Stage')->searchable(),

Start with the two Column::callback examples in the issue and review how callback columns are documented and handled by the searchable() option. Reproduce the reported queries, then clarify whether the expected result is working complex callbacks or documentation with supported examples; done means the behavior or usage is documented and verified.