code: protected void addChatter (Name name)
      {
          // check to see if the chatter validator approves..
          if ((_chatterValidator != null) && (!_chatterValidator.isChatterValid(name))) {
              return;
          }
  
          boolean wasthere = _chatters.remove(name);
          _chatters.addFirst(name);
          if (!wasthere) {
              if (_chatters.size() > MAX_CHATTERS) {
                  _chatters.removeLast();
              }
              notifyChatterObservers();
          }
      }
docs: Adds a chatter to our list of recent chatters.