default List<? extends Ticket> addTicket(final Stream<? extends Ticket> toSave) {
        return toSave.parallel().map(Unchecked.function(this::addTicket)).filter(Objects::nonNull).collect(Collectors.toList());
    }
Save.

@param toSave the to save
api/cas-server-core-api-ticket/src/main/java/org/apereo/cas/ticket/registry/TicketRegistry.java