You can search for identifiers within the package.
in-package search v0.2.0
module List_set : sig ... end
val map_find : f:('a -> 'b option) -> 'a list -> 'b option
val init_and_last : 'a list -> ('a list * 'a) option
val first_match : 'a list -> 'a list -> 'a option
val sub_equal : off:int -> len:int -> string -> string -> bool