BlockPluginCollection

class \Drupal\Component\Plugin\LazyPluginCollection implements \Drupal\Component\Plugin\IteratorAggregate, \Drupal\Component\Plugin\Countable
- class \Drupal\Core\Plugin\DefaultLazyPluginCollection extends \Drupal\Component\Plugin\LazyPluginCollection uses \Drupal\Core\DependencyInjection\DependencySerializationTrait
  - class \Drupal\Core\Condition\ConditionPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
  - class \Drupal\Core\Entity\EntityDisplayPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
  - class \Drupal\ctools\Plugin\BlockPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
  - class \Drupal\ctools\Plugin\VariantPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
  - class \Drupal\filter\FilterPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
  - class \Drupal\image\ImageEffectPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
  - class \Drupal\tour\TipsPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
  - class \Drupal\views\DisplayPluginCollection extends \Drupal\Core\Plugin\DefaultLazyPluginCollection
- class \Drupal\Core\Plugin\DefaultSingleLazyPluginCollection extends \Drupal\Component\Plugin\LazyPluginCollection uses \Drupal\Core\DependencyInjection\DependencySerializationTrait
- class \Drupal\plugin_test\Plugin\TestLazyPluginCollection extends \Drupal\Component\Plugin\LazyPluginCollection