anchor.diff:              #state{formatter = Formatter} = State) ->
       ?put_cmd_history(Command),
       Fun = fun() ->
  -                  case update_property(Command, Option) of
  +                  case update_property(Option) of
                         ok ->
                             Formatter:ok();
                         {error, Cause} ->
  
positive.code:             #state{formatter = Formatter} = State) ->
      ?put_cmd_history(Command),
      Fun = fun() ->
                    case remove_cluster(Command, Option) of
                        ok ->
                            Formatter:ok();
                        {error, Cause} ->
  
negative.code: 
  
  %% Command: "_authorized_"
  handle_call(_Socket, <<?LOGIN, ?SPACE, Option/binary>>,
              #state{formatter = Formatter} = State) ->
      Reply = case login(Option) of
                  {ok, User, Credential} ->
                      Formatter:login(User, Credential);
                  {error, Cause} ->
  