How do i format a relation column and return html?

[HashashinMaster]

this is my DemandeModel:

<?php

namespace App\Models;


use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Demande extends Model
{
    use HasFactory;

    function stage()
    {
        return $this->belongsTo(Stage::class);
    }
}

i want to get the Stage name property and return it inside badge. how do i do that?
I tried this but it returns the following error:

Attempt to read property "name" on null

DemandeTable.php

<?php

namespace App\Livewire;

use Rappasoft\LaravelLivewireTables\DataTableComponent;
use Rappasoft\LaravelLivewireTables\Views\Column;
use App\Models\Demande;
use App\Models\Stage;
use Illuminate\Database\Eloquent\Builder;
use Rappasoft\LaravelLivewireTables\Views\Filters\SelectFilter;
use Rappasoft\LaravelLivewireTables\Views\Filters\MultiSelectFilter;
use Rappasoft\LaravelLivewireTables\Views\Filters\DateRangeFilter;

class DemandeTable extends DataTableComponent
{
    protected $model = Demande::class;

    public function configure(): void
    {
        $this->setPrimaryKey('id');
    }
    public function filters(): array

    {
        $stages = Stage::all()->toArray();
        $stageFilter = [];
        foreach ($stages as $stage) {
            $stageFilter[$stage['id']] = $stage['name'];
        }

        return [

            SelectFilter::make('Status')
                ->options($stageFilter)
                ->filter(function (Builder $builder, string $value) {
                    $builder->whereRelation('stage', 'id', $value);
                }),
        ];
    }
    public function builder(): Builder
    {
      return Demande::query()->with("stage");  // tried here to get demande with stage
     
    }
    public function columns(): array
    {
        return [
            Column::make("Id", "id")
          
            Column::make("Status")
                ->sortable()
                ->searchable()
                ->label(
                    fn($row, Column $column) => '<span class="bg-blue-100 text-blue-800 text-xs font-medium me-2 px-2.5 py-0.5 rounded dark:bg-blue-900 dark:text-blue-300">' . $row->stage->name . '</span>
'
                )
                ->html(),
        ];
    }
}

[HashashinMaster]

found it, i just used format method instead of label :

 Column::make("Status", 'stage.name')
                ->sortable()
                ->searchable()
                ->format(
                    function ($value, $row, Column $column) {
                        return Helpers::generateStageBadge($value); // value here is the stage.name
                    }
                )
                ->html(),