You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = 'a
val return : 'a -> 'a t
val return_unit : unit t
val iter : ('a -> unit t) -> 'a list -> unit t
val fold_left : ('acc -> 'a -> 'acc t) -> 'acc -> 'a list -> 'acc t
val concat_map : ('a -> 'b list t) -> 'a list -> 'b list t
module Infix : sig ... end
module Syntax : sig ... end