anchor.diff:      vmq_plugin_mgr:disable_module_plugin(sample_all_till_ok_hook, ?MODULE, other_sample_hook_x, 1),
       call_no_hooks().
   
  -
   call_no_hooks() ->
       ?assertEqual({error, no_matching_hook_found},
                    vmq_plugin:only(sample_hook, [])),
  
positive.code:     call_no_hooks(),
  
      %% ENABLE PLUGIN
      ?assertEqual(ok, vmq_plugin_mgr:enable_plugin(vmq_plugin, "..")),
      ?assert(lists:keyfind(vmq_plugin, 1, application:which_applications()) /= false),
  
      io:format(user, "info all ~p~n", [vmq_plugin:info(all)]),
  
negative.code: enable_plugin_generic(Plugin, #state{config_file=ConfigFile} = State) ->
      case file:consult(ConfigFile) of
          {ok, [{plugins, Plugins}]} ->
              NewPlugins =
              case lists:keyfind(Key, 2, Plugins) of
                  false ->
  