code: public function addPrivateChatUpdate ($msgid, Neuron_GameServer_Player $from, Neuron_GameServer_Player $target)
  	{
  		$id = parent::addPrivateChatUpdate ($msgid, $from, $target);
  		return $id;
  	}
docs: CREATE TABLE  `n_privatechat_updates` (
  `pu_id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
  `pu_from` INT NOT NULL ,
  `pu_to` INT NOT NULL ,
  `pu_date` DATETIME NOT NULL
  ) ENGINE = INNODB