You can search for identifiers within the package.
in-package search v0.2.0
type timeval = {
tv_sec : int32;
tv_usec : int32;
}
val time : unit -> int32
val gmtime : int32 -> Unix.tm
val localtime : int32 -> Unix.tm
val mktime : Unix.tm -> int32 * Unix.tm
val gettimeofday : unit -> timeval
val difftime : int32 -> int32 -> float
val format_tm : string -> Unix.tm -> string
val format_time : string -> int32 -> string
val parse_tm : string -> string -> Unix.tm
val parse_time : string -> string -> int32
val ctime : int32 -> string
val asctime : Unix.tm -> string
val time_string : int32 -> string
val tm_string : Unix.tm -> string