6 files declare their use of InitEvent in Feeds 8.3

FeedClearHandler.php in src/FeedClearHandler.php

FeedExpireHandler.php in src/FeedExpireHandler.php

FeedsExecutable.php in src/FeedsExecutable.php

FeedsSubscriber.php in tests/modules/feeds_test_events/src/EventSubscriber/FeedsSubscriber.php

LazySubscriber.php in src/EventSubscriber/LazySubscriber.php

LazySubscriberTest.php in tests/src/Unit/EventSubscriber/LazySubscriberTest.php