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

    public function columns()
    {
        return [['name', function ($model) {
            return link_to("clients/{$model->public_id}", $model->name ?: '')->toHtml();
        }], ['first_name', function ($model) {
            return link_to("clients/{$model->public_id}", $model->first_name . ' ' . $model->last_name)->toHtml();
        }], ['email', function ($model) {
            return link_to("clients/{$model->public_id}", $model->email ?: '')->toHtml();
        }], ['clients.created_at', function ($model) {
            return Utils::timestampToDateString(strtotime($model->created_at));
        }], ['last_login', function ($model) {
            return Utils::timestampToDateString(strtotime($model->last_login));
        }], ['balance', function ($model) {
            return Utils::formatMoney($model->balance, $model->currency_id, $model->country_id);
        }]];
    }