anchor.diff:  %%                                      {stop, Reason, State}
   %% Description: Handling cast messages
   %%--------------------------------------------------------------------
  +-spec handle_cast({log, atom(), integer()}, #state{}) -> {noreply, #state{}}.
   handle_cast({log, Tag, Size}, State) ->
       case gb_trees:lookup(Tag, State#state.map) of
           none ->
  
positive.code: %%                                       {stop, Reason, State}
  %% Description: Handling all non call/cast messages
  %%--------------------------------------------------------------------
  handle_info(_Info, State) ->
      {noreply, State}.
  
  
negative.code: -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
           terminate/2, code_change/3]).
  
  -record(state, {start :: {integer(), integer(), integer()},
                  map   :: gb_tree()}).
  
  %%====================================================================
  %% API
  