You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = 'a
val return : 'a -> 'a
val bind : 'a -> ('a -> 'b) -> 'b
val fail : exn -> 'a
val catch : (unit -> 'a) -> (exn -> 'a) -> 'a
val finalize : (unit -> 'a) -> (unit -> 'b) -> 'a
val sleep : float -> unit
val auto_yield : 'a -> unit -> unit