ContextInterface

class \Drupal\Component\Plugin\Context\Context implements \Drupal\Component\Plugin\Context\ContextInterface
class \Drupal\Core\Plugin\Context\Context extends \Drupal\Component\Plugin\Context\Context implements \Drupal\Core\Plugin\Context\ContextInterface uses \Drupal\Core\TypedData\TypedDataTrait, \Drupal\Core\DependencyInjection\DependencySerializationTrait
class \Drupal\Core\Plugin\Context\EntityContext extends \Drupal\Core\Plugin\Context\Context