You can search for identifiers within the package.
in-package search v0.2.0
module Encoding : Resto.ENCODING with type 'a t = 'a Json_encoding.encoding and type schema = Json_schema.schema
module type VALUE = sig ... end
module Ezjsonm : VALUE with type t = Json_repr.Ezjsonm.value and type 'a encoding := 'a Encoding.t
module Bson : VALUE with type t = Json_repr_bson.bson and type 'a encoding := 'a Encoding.t