[FEATURE/IMPROVEMENT] persists incremental value between splunk restart

[lmnogues]

I'm using eventgen on a active development platform which needs to be restarted often.
We have data simulated from a BDD with incremental Ids.
It would be great to have a "persistance" of the offset between each eventgen run
Currently when splunk restarts, eventgen increments restart at the "replacement" value set in the conf.
something like a "persistance" option would be great :

[my_bdd]
index = idx_bdd
count = 10
mode = sample
interval= 30
autotimestamp = true
sourcetype = st_my_bdd
source = my_bdd
token.0.token = "ID":(\d+)
token.0.replacementType = integerid
token.0.replacement = 0
token.0.persistance = true