I need a way for a subscriber when they attach to get the last message broadcasted. I don't want a durable subscriber for multiple reasons one being I don't want every message I just want the last one. I just basically need the last message cached and anybody who attaches to that topic automatically gets this message. I can programmatically do it but it's cumbersome. I looked through the documentation here but didn't see anything that would help me. Is there anything I can use do this?