protected Stream<Ticket> decodeTickets(final Stream<Ticket> items) {
        if (!isCipherExecutorEnabled()) {
            LOGGER.trace(TICKET_ENCRYPTION_LOG_MESSAGE);
            return items;
        }
        return items.map(this::decodeTicket);
    }
Delete ticket-granting ticket's service tickets.

@param ticket the ticket
@return the count of tickets that were removed including child tickets and zero if the ticket was not deleted
core/cas-server-core-tickets-api/src/main/java/org/apereo/cas/ticket/registry/AbstractTicketRegistry.java