You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = 'a Monad.t
val (>>=) : 'a t -> ('a -> 'b t) -> 'b t
val return : 'a -> 'a t
val protect : f:(unit -> 'a t) -> finally:(unit -> 'b) -> 'a t