我试图在symfony 3.3中安装omnypay，我发现我必须安装 eventdispatcher：^ 2.8之前 使用：
composer require symfony/event-dispatcher:^2.8
但我收到了错误：
[InvalidArgumentException]
The service "resolve_controller_name_subscriber" must be public as event subscribers are lazy-loaded.
我将类（resolve_controller_name_subscriber）更改为公开，问题已解决，但我不确定这是否正确