def update(self, ttl=values.unset, collection_ttl=values.unset):
return self._proxy.update(ttl=ttl, collection_ttl=collection_ttl, )<EOL>
Update the SyncListInstance

:param unicode ttl: Alias for collection_ttl
:param unicode collection_ttl: Time-to-live of this List in seconds, defaults to no expiration.

:returns: Updated SyncListInstance
:rtype: twilio.rest.sync.v1.service.sync_list.SyncListInstance