default Long getTimeToLive() {
        return 0L;
    }
Describes the time duration where this policy should consider the item alive.
Once this time passes, the item is considered expired and dead.

@return time to live in seconds. A zero value indicates the time duration is not supported or is inactive.
api/cas-server-core-api-ticket/src/main/java/org/apereo/cas/ticket/ExpirationPolicy.java