Validation Placeholders being ignored for is_unique

https://codeigniter4.github.io/CodeIgnit...aceholders

PHP Code:

protected $validationRules = [
    'email' => 'required|valid_email|is_unique[users.email,id,{id}]'
]; 


looking at the is_unique method in Rules.php it does not appear {id} is being converted to it's corresponding value in $data.

Thanks,
Kyle