You can search for identifiers within the package.
in-package search v0.2.0
val group_proj : ('a -> 'b) -> 'a list -> 'a list list
val flatten_map : ('a -> 'b list) -> 'a list -> 'b list
val base_name : string -> string
module IntSet : sig ... end
module StringSet : sig ... end
val group_by : ?equals:('a -> 'a -> bool) -> 'a list -> 'a list list
val choose : ('a -> 'b option) -> 'a list -> 'b list
val duplicated_elements : ?proj:('a -> 'b) -> 'a list -> 'a list
val split : char -> string -> string list
val starts_with : prefix:string -> string -> bool