All classes that implement JoinPluginInterface in Zircon Profile 8
- class \Drupal\views\Plugin\views\join\JoinPluginBase implements JoinPluginInterface
- class \Drupal\views\Plugin\views\join\Standard
- class \Drupal\views\Plugin\views\join\Subquery
- class \Drupal\views_test_data\Plugin\views\join\JoinTest