anchor.diff:  
   %% Command: "version"
   %%
  -handle_call(_Socket, <<?VERSION, _/binary>>, #state{formatter = Formatter} = State) ->
  +handle_call(_Socket, <<?VERSION>>, #state{formatter = Formatter} = State) ->
       {ok, Version} = version(),
       Reply = Formatter:version(Version),
       {reply, Reply, State};
  
positive.code: 
  %% Command : "detach ${NODE_NAME}"
  %%
  handle_call(_Socket, <<?DETACH_SERVER, Option/binary>> = Command, #state{formatter = Formatter} = State) ->
      Reply = case detach(Command, Option) of
                  ok ->
                      Formatter:ok();
  
negative.code: %%----------------------------------------------------------------------
  %% Command: "du ${NODE_NAME}"
  %%
  handle_call(_Socket, <<?STORAGE_STATS, ?SPACE, Option/binary>> = Command, #state{formatter = Formatter} = State) ->
      Reply = case du(Command, Option) of
                  {ok, {Option1, StorageStats}} ->
                      Formatter:du(Option1, StorageStats);
  