7 classes are annotated with PurgeQueuer in Purge 8.3

AQueuer in tests/modules/purge_queuer_test/src/Plugin/Purge/Queuer/AQueuer.php

Test queuer A.

BQueuer in tests/modules/purge_queuer_test/src/Plugin/Purge/Queuer/BQueuer.php

Test queuer B.

CoreTagsQueuer in modules/purge_queuer_coretags/src/Plugin/Purge/Queuer/CoreTagsQueuer.php

Queues every tag that Drupal invalidates internally.

CQueuer in tests/modules/purge_queuer_test/src/Plugin/Purge/Queuer/CQueuer.php

Test queuer C.

DrushQueueAddQueuer in modules/purge_drush/src/Plugin/Purge/Queuer/DrushQueueAddQueuer.php

Queuer for the 'drush p:queue-add' command.

PurgeBlockQueuer in modules/purge_ui/src/Plugin/Purge/Queuer/PurgeBlockQueuer.php

Queuer for \Drupal\purge_ui\Form\PurgeBlockForm.

WithFormQueuer in tests/modules/purge_queuer_test/src/Plugin/Purge/Queuer/WithFormQueuer.php

Test queuer with a configuration form.