Multiinstance of WAMP Server and share connections between
We have this class to store and manage subscribers
https://github.com/ratchetphp/Ratchet/blob/master/src/Ratchet/Wamp/Topic.php

Any ideas how to save subscribers not in `\SplObjectStorage` but in memcached or redis?
To share subscribers between many ratchet instances.

Maybe what about to serialize `WampConnection` and store it in memcached?