@Override
    public String extractTicket(final String entry) {
        return StringUtils.substringBefore(entry, DELIMITER);
    }
This is the default tracking policy for descendant tickets.

@author Jerome LELEU
@since 7.0.0
core/cas-server-core-tickets-api/src/main/java/org/apereo/cas/ticket/tracking/DefaultDescendantTicketsTrackingPolicy.java