- /**
- * Return transport keyword which identifies items this queue handler
- * services; must be defined for all subclasses.
- *
- * Must be 8 characters or less to fit in the queue_item database.
- * ex "email", "jabber", "sms", "irc", ...
- *
- * @return string
- */
- function transport()
- {
- return null;
- }
-