public function rules(): array 	{ 		return [ 			'language' => ['required', 'string', Rule::in(array_column(Language::dynamicContent(), 'value'))], 			'order_number' => ['required', 'uuid', 'exists:' . Order::class . ',id'], 			'approval_code' => ['required', 'string', 'max:50'], 			'signature' => ['required', 'string', 'size:64'], 		]; 	}