You can search for identifiers within the package.
in-package search v0.2.0
type t = {
date : int * int * int;
time : int * int * int * float;
tz : (int * int * [ `E | `W ]) option;
}
val to_posix_time : t -> float
val date_to_posix_time : y:int -> m:int -> d:int -> hh:int -> mm:int -> ss:int -> ff:float -> tz_mm:int -> float