module GenSet:This functor is similar to theReins.Sets.GenSetSigFnStd
Reins.AVLSet.MonoSet
functor except
it is parameterized by a module that also supports the gen
operation. Therefore, the resulting module is also able to
generate number sets.include Reins.Sets.MonoSetSig
val gen : ?size:int -> Random.State.t -> t