You can search for identifiers within the package.
in-package search v0.2.0
type ('k, 'v, 'cmp) t = ('k, 'v, 'cmp) Incr_map.Make(Incr).Lookup.t
val create : ?data_equal:('v -> 'v -> bool) -> ('k, 'v, 'cmp) Core_kernel.Map.t Incr.t -> comparator:('k, 'cmp) Core_kernel.Comparator.t -> ('k, 'v, 'cmp) t
val find : ('k, 'v, 'a) t -> 'k -> 'v option Incr.t
module For_debug : sig ... end