public ExpirationPolicy toTransientSessionTicketExpirationPolicy() {
        val tst = casProperties.getTicket().getTst();
        return new MultiTimeUseOrTimeoutExpirationPolicy.TransientSessionTicketExpirationPolicy(
            tst.getNumberOfUses(),
            tst.getTimeToKillInSeconds());
    }
To transient ticket expiration policy.

@return the expiration policy
core/cas-server-core-tickets-api/src/main/java/org/apereo/cas/ticket/expiration/builder/TransientSessionTicketExpirationPolicyBuilder.java