You can search for identifiers within the package.
in-package search v0.2.0
sihl.middleware
Sihl_middleware.Message
module Http = Sihl_http
module Message = Sihl_message
val log_src : Logs.src
module Logs : Logs.LOG
val key : Message.t Opium_kernel.Hmap.key
val find : Opium_kernel.Request.t -> Message.t
val find_opt : Opium_kernel.Request.t -> Message.t option
val set : Message.t -> Opium_kernel.Request.t -> Opium_kernel.Request.t
module Make (MessageService : Message.Sig.SERVICE) : sig ... end