$rules */ public function __construct( public string $domain, public string $key, public string $type, public mixed $systemDefault, public array $rules, private ?Closure $normalizer = null, ) {} public function dotKey(): string { return $this->domain.'.'.$this->key; } public function normalize(mixed $value): mixed { if ($this->normalizer instanceof Closure) { return ($this->normalizer)($value); } return $value; } }