public function __construct($eventName, ContainerInterface $container, $serviceId, $method = null, $band = '')
{
$this->container = $container;
$this->serviceId = $serviceId;
$this->method = $method;
parent::__construct($eventName, $band);
}
public function __construct($eventName, callable $listener, EventDispatcherInterface $eventDispatcher, $band = null)
{
$this->listener = $listener;
$this->eventDispatcher = $eventDispatcher;
parent::__construct($eventName, $band);
}