Creates a new expiry registration instance, associates client with it
and registers client with this timeout manager.
The returned object should be reused. The client will remain associated
to the expiry registration after it has been unregistered from the
timeout manager.
Creates a new expiry registration instance, associates client with it and registers client with this timeout manager. The returned object should be reused. The client will remain associated to the expiry registration after it has been unregistered from the timeout manager.