You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = 'a LocatedStream.t
val return : 'a -> 'a t
val (>>=) : 'a t -> ('a -> 'b t) -> 'b t
val fail : exn -> 'a t
type stream = LocatedStream.stream
val set_decoder : string -> stream -> unit
val next_char : stream -> (unit -> 'b t) -> (int -> 'b t) -> 'b t
val error : ?stream:stream -> exn -> 'a t