anchor.diff:      Result = case redis_backend:put(Bucket, Key, "_", Value, State#state.redis_state) of
           {ok, _} ->
               ok;
  -        {error, _, _} ->
  -            error
  +        Error ->
  +            Error
       end,
       {reply, {RequestId, Result}, State};
   
  
positive.code:     Result = case redis_backend:smembers(Bucket, Key, "_", State#state.redis_state) of
                   {ok, Value, _} ->
                       {ok, Value};
                   {error, _, _} ->
                       error
               end,
      {reply, {RequestId, Result}, State};
  
  
negative.code:     Result = case redis_backend:del(Bucket, Key, State#state.redis_state) of
                 {ok, _} ->
                     ok;
                 Error ->
                     Error
               end,
      {reply, {RequestId, Result}, State};
  
  