/**
  * registerPlugins
  * 
  * @param array $plugins
  */
 public function registerPlugins($plugins)
 {
     parent::registerPlugins($plugins);
     foreach ($this->_plugins as $plugin) {
         if ($plugin instanceof Tinebase_User_Plugin_SqlInterface) {
             if (Tinebase_Core::isLogLevel(Zend_Log::DEBUG)) {
                 Tinebase_Core::getLogger()->debug(__METHOD__ . '::' . __LINE__ . " Registering " . get_class($plugin) . ' SQL plugin.');
             }
             $this->_sqlPlugins[] = $plugin;
         }
     }
 }