Тестовая запись в блоге
Тестовый текст в тестовой записи блога Register listeners with concrete event names You may use a more simple listener provider, which allows you to specify which event they can provide. It can be useful in some specific cases, for instance if one of your listeners does not need the event object passed as a parameter (can happen if the listener only needs to run at a specific stage during runtime, but does not need event data). In that case, it is advised to use the aggregate (see above) if you need features from both providers included in this library.