else
                return self::radioList($name, $selected, $items, [ 'class' => 'btn-group', 'data-toggle' => 'buttons', 'item' => function ($index, $label, $name, $checked, $value)
                {
                    return self::label(self::radio($name, $checked, [ 'autocomplete' => 'off', 'value' => $value ]) . ' ' . $label, null, [ 'class' => 'btn btn-default' . ( $checked ? ' active' : '' ) ]);
                } ]);