You can search for identifiers within the package.
in-package search v0.2.0
vlt
vlt.mt
vlt_ppx
Level.Extension
val make : string -> (Ppxlib__.Location.t -> Ppxlib__.Import.expression) -> Ppxlib.Extension.V3.t
val fatal : Ppxlib.Extension.V3.t
val error : Ppxlib.Extension.V3.t
val warn : Ppxlib.Extension.V3.t
val info : Ppxlib.Extension.V3.t
val debug : Ppxlib.Extension.V3.t
val trace : Ppxlib.Extension.V3.t