@Override
    public boolean isExpired(final TicketGrantingTicketAwareTicket ticketState) {
        val expired = isRefreshTokenExpired(ticketState);
        return expired || super.isExpired(ticketState);
    }
Instantiates a new OAuth refresh token expiration policy.

@param timeToKillInSeconds the time to kill in seconds
support/cas-server-support-oauth-core-api/src/main/java/org/apereo/cas/ticket/refreshtoken/OAuth20RefreshTokenExpirationPolicy.java