anchor.diff:  %%          {noreply, State, Timeout} |
   %%          {stop, Reason, State}            (terminate/2 is called)
   %%----------------------------------------------------------------------
  -handle_cast(Msg, State) ->
  +handle_cast(_Msg, State) ->
       {noreply, State}.
   
   %%----------------------------------------------------------------------
  
positive.code: %%          {stop, Reason, Reply, State}   | (terminate/2 is called)
  %%          {stop, Reason, State}            (terminate/2 is called)
  %%----------------------------------------------------------------------
  handle_call(Request, From, State) ->
      Reply = ok,
      {reply, Reply, State}.
  
  
negative.code: %%          {noreply, State, Timeout} |
  %%          {stop, Reason, State}            (terminate/2 is called)
  %%----------------------------------------------------------------------
  handle_info(_Info, State) ->
      {noreply, State}.
  
  %%----------------------------------------------------------------------
  