yii2 gridview custom column

In this example you can see Name attribute using as custom column.

Yii2 gridview custom column

GridView::widget([
    'dataProvider' => $dataProvider,
    'filterModel' => $searchModel,
    'columns' => [
        ['class' => 'yii\grid\SerialColumn'],
        'id',
        'username',
        'created_at',
        [
       'label' => 'Name',
       'value' => function ($model) {
           return $model->user->first_name;
       }
     ],
        ['class' => 'yii\grid\ActionColumn'],
    ],
]);