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# Upgrade to 2.0
## Made the `$event` parameter of `EventManager::getListeners()` mandatory
When calling `EventManager::getListeners()` you need to specify the event that
you want to fetch the listeners for. Call `getAllListeners()` instead if you
want to access the listeners of all events.
# Upgrade to 1.2
## Deprecated calling `EventManager::getListeners()` without an event name
When calling `EventManager::getListeners()` without an event name, all
listeners were returned, keyed by event name. A new method `getAllListeners()`
has been added to provide this functionality. It should be used instead.
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