Durable client, reconnect and detecting interest

Hi,

Given the following scenario:

1. Durable client

2. Server side register interest

3. Durable client lost connectivity for more than the durable-client-timeout setting

4. Connectivity is restored and GemFire durable client automatically reconnects (GF client internally just reconnects)

What is the way(s) to detect that client durability was already expired on cache server?

Thank you