You can search for identifiers within the package.
in-package search v0.2.0
type 'a m
val return : 'a -> 'a m
val bind : 'a m -> ('a -> 'b m) -> 'b m
val map : 'a m -> ('a -> 'b) -> 'b m
val lift : ('a -> 'b) -> 'a m -> 'b m
val iter : 'a m -> ('a -> unit) -> unit
module Infix : sig ... end