/** * Aliases the user id from a temporary id to a permanent one * * @param array $message * * @return bool * Whether the alias call succeeded * */ public static function alias(array $message) { self::checkClient(); $userId = !empty($message["userId"]); $previousId = !empty($message["previousId"]); self::assert($userId && $previousId, "Segment::alias() requires both userId and previousId"); return self::$client->alias($message); }