You can search for identifiers within the package.
in-package search v0.2.0
incr_map.collate
Incr_map_collate.Fold
type ('k, 'v, 'acc) t
val create : ?revert_to_init_when_empty:bool -> init:'acc -> add:(key:'k -> data:'v -> 'acc -> 'acc) -> ?update:(key:'k -> old_data:'v -> new_data:'v -> 'acc -> 'acc) -> remove:(key:'k -> data:'v -> 'acc -> 'acc) -> ?finalize:('acc -> 'acc) -> unit -> ('k, 'v, 'acc) t