All classes that implement UserMergeActionPluginInterface in User Merge 2.x
- class \Drupal\usermerge\Plugin\UserMerge\Action\ActionBlock
- class \Drupal\usermerge\Plugin\UserMerge\Action\ActionDelete
- class \Drupal\usermerge\Plugin\UserMerge\Action\UserMergeActionBase implements UserMergeActionPluginInterface