cutom actioncolumn

<?= GridView::widget([
    'dataProvider' => $dataProvider,
    'filterModel' => $searchModel,
    'options'=>[
        'class'=>'table table-striped table-bordered bootstrap-datatable datatable',
    ],
    'columns' => [
        ['class' => 'yii\grid\SerialColumn'],

        'id',
        'username',
        //'auth_key',
        //'password_hash',
        //'password_reset_token',
        // 'email:email',
        // 'role',
        // 'status',
        // 'createdtime:datetime',
        // 'updatedtime:datetime',

        ['class' => 'yii\grid\ActionColumn',
            'template'  => '{view}{update}{delete}',
            'buttons' => [
                'view' => function ($url, $model) {
                    return Html::a('<i class="halflings-icon white zoom-in"></i>', $url, [
                                'title' => Yii::t('app', 'Show'),
                                'class' => 'btn btn-success',
                    ]);
                },
                'update' => function ($url, $model) {
                    return Html::a('<i class="halflings-icon white edit"></i>', $url, [
                                'title' => Yii::t('app', 'Edit'),
                                'class' => 'btn btn-info',
                    ]);
                },
                'delete' => function ($url, $model) {
                    return Html::a('<i class="halflings-icon white trash"></i>', $url, [
                                'title' => Yii::t('app', 'Delete'),
                                'class' => 'btn btn-danger',
                    ]);
                }

            ]
        ],
    ],
]); ?>