public static function createContactFromAttributes(
        string $firstName,
        string $phoneNumber,
        ?string $lastName = null,
        ?string $title = null,
        ?string $organization = null,
        ?string $email = null,
        ?string $notes = null
    ) : Contact {
        return new Contact(
            $firstName,
            $phoneNumber,
            $lastName,
            $title,
            $organization,
            $email,
            $notes
        );
    }