You can search for identifiers within the package.
in-package search v0.2.0
type 'src t
type 'src reader = 'src t
type 'src read = (module Read with type t = 'src)
val of_read_src : 'src. 'src read -> 'src -> 'src t
val read : 'src reader -> buf:Buffer.t -> (int, [> `Closed | `Eof ]) result
module Make (B : Read) : sig ... end
module Buffered : sig ... end
val of_buffer : Buffer.t -> unit Buffered.t t