6 files declare their use of TomeSyncEvents in Tome 8

BookEventSubscriber.php in modules/tome_sync/src/EventSubscriber/BookEventSubscriber.php

ContentHasherEventSubscriber.php in modules/tome_sync/src/EventSubscriber/ContentHasherEventSubscriber.php

ExportCommand.php in modules/tome_sync/src/Commands/ExportCommand.php

Exporter.php in modules/tome_sync/src/Exporter.php

ImportCompleteCommand.php in modules/tome_sync/src/Commands/ImportCompleteCommand.php

Importer.php in modules/tome_sync/src/Importer.php