module RandState: sig .. end
sig
end
val make_init_bak : unit -> UtilsLib.Random.State.t * string
unit -> UtilsLib.Random.State.t * string
make possible to init with the same seed again
val make_bak_init : string -> UtilsLib.Random.State.t
string -> UtilsLib.Random.State.t
init using a backup seed