final public static function clearInstance($className)
  {
    if (isset(self::$_instances[$className])) {
      $name = self::_configName($className);
      Config::clearInstance($name);

      self::$_instances[$className]->_loadObservers();
    }
  }
final public static function clearInstance($className)
  {
    if (isset(self::$_instances[$className])) {
      $name = self::_configName($className);
      Config::clearInstance($name);

      self::$_instances[$className]->_loadObservers();
    }
  }
final public static function clearInstance ( $ className ) { if ( isset ( self :: $ _instances [ $ className ] ) ) { $ name = self :: _configName ( $ className ) ; Config :: clearInstance ( $ name ) ; self :: $ _instances [ $ className ] -> _loadObservers ( ) ; } }
Unloads event instance.

@param string $className Event name

@return null
Unloads event instance .