The:method:`Symfony\\Component\\EventDispatcher\\EventDispatcher::dispatch`

method notifies all listeners of the given event. It takes two arguments:

the ``Event`` instance to pass to each listener of that event and the name

of the event to dispatch::

the ``Event`` instance to pass to each listener of that event and optionally the

name of the event to dispatch. If it's not defined, the class of the ``Event``

instance will be used::