You can search for identifiers within the package.
in-package search v0.2.0
type 'a0 t = 'a
val return : 'a -> 'a t
val join : 'a t t -> 'a t
val bind : 'a t -> ('a -> 'b t) -> 'b t
val fmap : ('a -> 'b) -> 'a t -> 'b t