You can search for identifiers within the package.
in-package search v0.2.0
type 'a t
val return : 'a -> 'a t
val (>>=) : 'a t -> ('a -> 'b t) -> 'b t
val (>|=) : 'a t -> ('a -> 'b) -> 'b t
val fail : exn -> 'a t
val perform : Curl.t -> Curl.curlCode t