final public static function getInstance()
  {
    $className = get_called_class();
    
    if (!isset(self::$_instances[$className])) {
      self::$_instances[$className] = new static();
    }
    self::$_instances[$className]->initialize();

    return self::$_instances[$className];
  }
final public static function getInstance()
  {
    $className = get_called_class();
    
    if (!isset(self::$_instances[$className])) {
      self::$_instances[$className] = new static();
    }
    self::$_instances[$className]->initialize();

    return self::$_instances[$className];
  }
final public static function getInstance ( ) { $ className = get_called_class ( ) ; if ( ! isset ( self :: $ _instances [ $ className ] ) ) { self :: $ _instances [ $ className ] = new static ( ) ; } self :: $ _instances [ $ className ] -> initialize ( ) ; return self :: $ _instances [ $ className ] ; }
Return event instance

@return Event
Return event instance