DeclareSchemeval declare_scheme : Libobject.locality -> string -> (Names.GlobRef.t * Names.GlobRef.t) -> unitval lookup_scheme : string -> Names.GlobRef.t -> Names.GlobRef.tval lookup_scheme_opt : string -> Names.GlobRef.t -> Names.GlobRef.t optionval all_schemes : unit -> Names.GlobRef.t CString.Map.t Names.GlobRef.Map_env.t