default long countTicketsFor(final Ticket ticketGrantingTicket, final Service service) {
        return 0;
    }
Count tickets for a given service.

@param ticketGrantingTicket the ticket granting ticket
@param service              the service
@return the count
api/cas-server-core-api-ticket/src/main/java/org/apereo/cas/ticket/tracking/TicketTrackingPolicy.java