You can search for identifiers within the package.
in-package search v0.2.0
val expand_in : string array -> string -> string
val in_dir : string -> (unit -> 'a) -> 'a
val directories : unit -> string list
val files : unit -> string list
val tree : unit -> string list
val safe_unlink : string -> unit
val safe_mkdir : string -> Unix.file_perm -> unit
val safe_rec_mkdir : string -> Unix.file_perm -> unit
val safe_rec_rmdir : string -> unit
val string_of_stdout : (unit -> unit) -> string
val modtime : string -> float