6 files declare their use of LockException in Feeds 8.3

Feed.php in src/Entity/Feed.php

FeedExpireHandler.php in src/FeedExpireHandler.php

FeedImportHandler.php in src/FeedImportHandler.php

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

FeedsExecutable.php in src/FeedsExecutable.php

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