anchor.diff:          {value, {SessionId, Html}, _LastMsg} ->
               %% Already sent Html
               %% Remove subscriber after 5 secs.
  -            erlang:send_after(5000, self(), {removeSubscriber, [From]}),
  +            erlang:send_after(5000, self(), {removeSubscriber, From}),
               {noreply, State#state{subscribers = [From|Subscribers],
                                     lastMsg     = LastMsg2}};
           {value, {SessionId, _Html}, LastMsg3} ->
  
positive.code: handle_call({checkForMessage, _SessionId, _Env, _Input}, From,
              State = #state{subscribers = Subscribers, messages = []}) ->
      %% Remove subscriber after 5 secs.
      erlang:send_after(5000, self(), {removeSubscriber, [From]}),
      {noreply, State#state{subscribers = [From|Subscribers]}};
  %% New messages to be sent to web client.
  handle_call({checkForMessage, SessionId, _Env, _Input}, From,
  
negative.code:         Value2 -> Value2
      catch
          _:_ -> "0"
      end.
  