You can search for identifiers within the package.
in-package search v0.2.0
module S : sig ... end
val gc : Tezos_rpc.Context.simple -> Gc.stat Tezos_base.TzPervasives.Error_monad.tzresult Lwt.t
val memory : Tezos_rpc.Context.simple -> Tezos_base.TzPervasives.Memory.mem_stats Tezos_base.TzPervasives.Error_monad.tzresult Lwt.t