You can search for identifiers within the package.
in-package search v0.2.0
val return : 'a -> 'a t
val (<*>) : ('a -> 'b) t -> 'a t -> 'b t
same as apply
apply
val (<*) : 'a t -> unit t -> 'a t
val (*>) : unit t -> 'a t -> 'a t
val (>>|) : 'a t -> ('a -> 'b) -> 'b t
module Let_syntax : sig ... end