23 files declare their use of FeedsEvents in Feeds 8.3

AfterParseBase.php in src/EventSubscriber/AfterParseBase.php

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

ConfigEntityReferenceTest.php in tests/src/Kernel/Feeds/Target/ConfigEntityReferenceTest.php

CsvFeed.php in tests/modules/feeds_test_alter_source/src/EventSubscriber/CsvFeed.php

EntityProcessorBase.php in src/Feeds/Processor/EntityProcessorBase.php

Feed.php in src/Entity/Feed.php

FeedClearHandler.php in src/FeedClearHandler.php

FeedClearHandlerTest.php in tests/src/Unit/FeedClearHandlerTest.php

FeedExpireHandler.php in src/FeedExpireHandler.php

FeedExpireHandlerTest.php in tests/src/Unit/FeedExpireHandlerTest.php

FeedRefreshTest.php in tests/src/Unit/Plugin/QueueWorker/FeedRefreshTest.php

FeedsExecutable.php in src/FeedsExecutable.php

FeedsExecutableTest.php in tests/src/Unit/FeedsExecutableTest.php

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

FeedSubscriber.php in tests/modules/feeds_test_multiple_cron_runs/src/EventSubscriber/FeedSubscriber.php

FeedTest.php in tests/src/Kernel/Entity/FeedTest.php

LazySubscriber.php in src/EventSubscriber/LazySubscriber.php

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

MyFeed.php in tests/modules/feeds_test_extra_sources/src/EventSubscriber/MyFeed.php

PubSubHubbub.php in src/EventSubscriber/PubSubHubbub.php

SkipNewTest.php in tests/src/Kernel/SkipNewTest.php

UpdateNonExistentTest.php in tests/src/Functional/UpdateNonExistentTest.php

UserFeed.php in tests/modules/feeds_test_alter_source/src/EventSubscriber/UserFeed.php