public ExpirationPolicy toProxyTicketExpirationPolicy() {
        val pt = casProperties.getTicket().getPt();
        return new MultiTimeUseOrTimeoutExpirationPolicy.ProxyTicketExpirationPolicy(
            pt.getNumberOfUses(),
            pt.getTimeToKillInSeconds());
    }
To proxy ticket expiration policy.

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