default String trackTicket(final Ticket ownerTicket, final Ticket ticket) {
        return null;
    }
Track application attempt and access.
Typically, ticket-granting tickets keep track of applications
and service tickets for which they are authorized to issue tickets.

@param ownerTicket the owner ticket
@param ticket      the tracked ticket
api/cas-server-core-api-ticket/src/main/java/org/apereo/cas/ticket/tracking/TicketTrackingPolicy.java