事件侦听器，用于更改调度事件的代码流

Question

如果你有一个调度事件x的事件调度程序，并且这个事件有一个监听器，那么该监听器改变调度事件的代码流的最佳方式是什么？

// Task x was completed
$this->dispatcher->dispatch('event.x', $event);

// Can one of the event listeners for event x stop further code from executing
// after the event was dispatched?