You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = 'a Tezos_base.TzPervasives.Internal_event.Simple.t
val emit : 'a t -> 'a -> unit Lwt.t
val proxy_getter_created : (string * string) t
val proxy_block_rpc : (string * string * string list) t
val tree_received : int64 t