6 files declare their use of FeedType in Feeds 8.3

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

FeedCreationTrait.php in tests/src/Traits/FeedCreationTrait.php

FeedsJavascriptTestBase.php in tests/src/FunctionalJavascript/FeedsJavascriptTestBase.php

FeedsPermissions.php in src/FeedsPermissions.php

FeedTypeTest.php in tests/src/Unit/Entity/FeedTypeTest.php

UpdateNonExistentActionUpdateTest.php in tests/src/Functional/Update/UpdateNonExistentActionUpdateTest.php