anchor.diff:  
   refresh_path_do(Path, App) ->
       Modules = mods_in_path(Path),
  -    ?DEBUG("reloading ~p from ~ts", [Modules, Path]),
  +    ?DIAGNOSTIC("reloading ~p from ~ts", [Modules, Path]),
       code:replace_path(App, Path),
       reload_modules(Modules).
   
  
positive.code:             case code:load_file(M) of
                  {module, M} -> ok;
                  {error, Error} ->
                      ?DEBUG("Module ~p failed to load because ~p", [M, Error])
              end
          end, Modules
      ).
  
negative.code: %% run by no processes get unloaded by rebar_paths, without being loaded back in.
  refresh_path_blacklisted(Path) ->
      Modules = [M || M <- mods_in_path(Path), not is_loaded(M)],
      ?DIAGNOSTIC("ensure ~p loaded", [Modules]),
      code:add_pathz(Path), % in case the module is only in a new non-clashing path
       _ = [code:ensure_loaded(M) || M <- Modules],
      ok.
  