You can search for identifiers within the package.
in-package search v0.2.0
val spf : ('a, unit, string) Stdlib.format -> 'a
val let@ : ('a -> 'b) -> 'c -> 'd
val id : 'a -> 'b
module Option : sig ... end
val unwrap_result_failwith : ('a, string) Stdlib.result -> 'b
val wrap_failwith : string -> (unit -> 'a) -> 'b
val guard_res : ?ctx:string -> (unit -> 'a) -> ('b, string) Stdlib.result
module Lwt_infix : sig ... end