You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = 'a
val return : 'a -> 'a t
val bind : 'a t -> ('a -> 'b t) -> 'b t
val fail : exn -> 'a t
val catch : (unit -> 'a t) -> (exn -> 'a t) -> 'a t
val finalize : (unit -> 'a t) -> (unit -> unit t) -> 'a t
val sleep : float -> unit t
val auto_yield : float -> unit -> unit t
type mutex
val create_recursive_mutex : unit -> mutex
val with_lock : mutex -> (unit -> 'a t) -> 'a t
val register_finaliser : ('a -> unit t) -> 'a -> unit
include THREAD_LOCAL_STATE with type 'a t := 'a t with type 'a key = 'a Lwt.key
type 'a key = 'a Lwt.key
val new_key : unit -> 'a key
val get : 'a key -> 'a option
val with_value : 'a key -> 'a option -> (unit -> 'b t) -> 'b t