You can search for identifiers within the package.
in-package search v0.2.0
type t = unit Ctypes.ptr
val t : t Ctypes.typ
val new_ : (unit -> t F.return) F.result
val delete : (t -> unit F.return) F.result
val inherit_argv : (t -> unit F.return) F.result
val inherit_env : (t -> unit F.return) F.result
val inherit_stdin : (t -> unit F.return) F.result
val inherit_stdout : (t -> unit F.return) F.result
val inherit_stderr : (t -> unit F.return) F.result
val preopen_dir : (t -> string -> string -> bool F.return) F.result