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[EventDispatcher] Document event name is optionnal #21014

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[EventDispatcher] Document event name is optionnal #21014

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5 changes: 3 additions & 2 deletions components/event_dispatcher.rst
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Expand Up @@ -277,8 +277,9 @@ Dispatch the Event

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::

use Acme\Store\Event\OrderPlacedEvent;
use Acme\Store\Order;
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