getLocalSyms :: DevGraphNavigator a => a -> Node -> Set.Set G_symbol
getLocalSyms dgnav n =
    case dgn_origin $ getLocalLabel dgnav n of
      DGBasicSpec _ _ s -> s
      _ -> Set.empty
getLocalSyms :: DevGraphNavigator a => a -> Node -> Set.Set G_symbol
getLocalSyms dgnav n =
    case dgn_origin $ getLocalLabel dgnav n of
      DGBasicSpec _ _ s -> s
      _ -> Set.empty
getLocalSyms dgnav n =
    case dgn_origin $ getLocalLabel dgnav n of
      DGBasicSpec _ _ s -> s
      _ -> Set.empty