Как вставить переменную в правило валидации laravel?

$v = Validator::make($this->request->all(), [
            'type' => 'required|in:1,2,3,'.$peremennaya,
        ]);

$v = Validator::make($this->request->all(), [
            'type' => "required|in:1,2,3,{$peremennaya}",
        ]);

$v = Validator::make($this->request->all(), [
            'type' => "required|in:".implode(',', $massiv_peremennih),
        ]);