All classes that implement IdentityChannelPluginInterface in Courier 2.x
- class \Drupal\courier\Plugin\IdentityChannel\Broken implements IdentityChannelPluginInterface
- class \Drupal\courier\Plugin\IdentityChannel\CourierEmail\User implements IdentityChannelPluginInterface
- class \Drupal\courier_test_message\Plugin\IdentityChannel\TestMessage\User implements IdentityChannelPluginInterface