App\Ninja\Datatables\TaxRateDatatable::columns PHP Method

    public function columns()
    {
        return [['name', function ($model) {
            return link_to("tax_rates/{$model->public_id}/edit", $model->name)->toHtml();
        }], ['rate', function ($model) {
            return $model->rate . '%';
        }]];
    }