anchor.diff:                     leo_misc:get_value('num_of_sync_vnode_msg',  CustomItems, 0),
                      leo_misc:get_value('num_of_rebalance_msg',   CustomItems, 0)
                     ]).
  +
  +
  +%% @private
  +exchange_value([], Ret) ->
  +    Ret;
  +exchange_value([{Ret, NewRet}|_], Ret) ->
  +    NewRet;
  +exchange_value([{_,_}|Rest], Ret) ->
  +    exchange_value(Rest, Ret).
   
   
   %% @doc Status of compaction
  
positive.code: 
      WatchdogProps = leo_misc:get_value('watchdog', State, []),
  
      io_lib:format(lists:append(["[config-1]\r\n",
                                  "                      version : ~s\r\n",
                                  "                      log dir : ~s\r\n",
                                  "[config-2]\r\n",
                                  "  -- http-server-related --\r\n",
                                  "          using api [s3|rest] : ~w\r\n",
                                  "               listening port : ~w\r\n",
  
negative.code:          whereis/1, histories/1,
           authorized/0, user_id/0, password/0
          ]).
  
  -define(BOOL_TO_ENABLE, [{true,  enabled},
                           {false, disabled}]).
  
  %% @doc Format 'ok'
  %%
  