val singleton_or_more : fold:('t, 'a, 'a singleton_or_more) InferStdlib.IStd.Container.fold ‑> 't ‑> 'a singleton_or_more
val mem_nth : fold:('t, _, int) InferStdlib.IStd.Container.fold ‑> 't ‑> int ‑> bool
val forto : (int, int, 'accum) InferStdlib.IStd.Container.fold
val rev_map_to_list : fold:('t, 'a, 'b list) InferStdlib.IStd.Container.fold ‑> 't ‑> f:('a ‑> 'b) ‑> 'b list
val rev_filter_map_to_list : fold:('t, 'a, 'b list) InferStdlib.IStd.Container.fold ‑> 't ‑> f:('a ‑> 'b option) ‑> 'b list