|null */ private readonly ?array $languages = null, ) {} /** * @param list|null $languages */ public static function with( ?string $country = null, ?array $languages = null, ): self { return new self($country, $languages); } /** @return array */ public function toArray(): array { return array_filter([ 'country' => $this->country, 'languages' => $this->languages, ], fn (mixed $v): bool => $v !== null); } public function getCountry(): ?string { return $this->country; } /** @return list|null */ public function getLanguages(): ?array { return $this->languages; } }