Expanded class hierarchy of SearchApiFacetSourceInterface in Facets 8
- interface \Drupal\Core\Plugin\PluginFormInterface; interface \Drupal\Component\Plugin\DependentPluginInterface
- interface \Drupal\facets\FacetSource\FacetSourcePluginInterface
- interface \Drupal\facets\FacetSource\SearchApiFacetSourceInterface
- interface \Drupal\facets\FacetSource\FacetSourcePluginInterface