/**
  * the singleton pattern
  *
  * @return Admin_Controller_Config
  */
 public static function getInstance()
 {
     if (self::$_instance === NULL) {
         self::$_instance = new Admin_Controller_Config();
     }
     return self::$_instance;
 }
 /**
  * deletes existing records
  *
  * @param  array  $ids
  * @return array
  */
 public function deleteConfigs($ids)
 {
     return $this->_delete($ids, Admin_Controller_Config::getInstance());
 }