You can search for identifiers within the package.
in-package search v0.2.0
type 'a t
val bind : 'a t -> ('a -> 'b t) -> 'b t
val return : 'a -> 'a t
val both : 'a t -> 'b t -> ('a * 'b) t
val join : unit t list -> unit t
val pick : 'a t list -> 'a t
val choose : 'a t list -> 'a t
val async : (unit -> unit t) -> unit
val cancel : 'a t -> unit
val sleep : float -> unit t
val run : 'a t -> 'a