12 files declare their use of ParseEvent 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

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

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

ParseEventTest.php in tests/src/Unit/Event/ParseEventTest.php

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