code: public function getPrivateChatUpdates (Neuron_GameServer_Player $target, $since = null)
  	{
  		if (isset ($since))
  		{
  
  		}
  
  		return parent::getPrivateChatUpdates ($target, $since);
  	}
docs: If $since is said, return all events since "since".
  If $since is not said, return the single latest event.
  
  ($since is obviously the pu_id)