You can search for identifiers within the package.
in-package search v0.2.0
type (!'a, !'b) either =
| Right of 'a
| Left of 'b
val exnhook : (exn -> unit) option Pervasives.ref
val finally' : (unit -> 'a) -> (unit -> 'b) -> 'a
val may : ('a -> 'b) -> 'a option -> 'b option
val default : 'a -> 'a option -> 'a
val maybe : ('a -> unit) -> 'a option -> unit
module String : sig ... end
val filter_out : 'a list -> 'a list -> 'a list
val filter_in : 'a list -> 'a list -> 'a list
val list_remove : 'a -> 'a list -> 'a list
val list_tl_multi : int -> 'a list -> 'a list
val hexify : string -> bytes
val unhexify : string -> bytes
val trim_path : string -> string
val join_by_null : string list -> string