CMailDomainRegistrar::isDomainExists

static function isDomainExists(string $user, string $password, string $domain, ?string &$error): ?bool
{
	$result = self::$classRegistrar::checkDomain($user, $password, $domain, $error);

	if ($result === null)
	{
		$error = self::getErrorCode($error);
		return null;
	}
	else
	{
		return $result;
	}
}