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Expanded class hierarchy of RelationStorage in Relation 8.2

class \Drupal\Core\Entity\EntityHandlerBase uses DependencySerializationTrait, StringTranslationTrait
- class \Drupal\Core\Entity\EntityAccessControlHandler implements EntityAccessControlHandlerInterface
- class \Drupal\Core\Entity\EntityListBuilder implements EntityHandlerInterface, EntityListBuilderInterface uses MessengerTrait, RedirectDestinationTrait
- class \Drupal\Core\Entity\EntityStorageBase implements EntityHandlerInterface, EntityStorageInterface
  - class \Drupal\apigee_edge\Entity\Storage\EdgeEntityStorageBase implements EdgeEntityStorageInterface
  - class \Drupal\Core\Config\Entity\ConfigEntityStorage implements ConfigEntityStorageInterface, ImportableEntityStorageInterface
  - class \Drupal\Core\Entity\ContentEntityStorageBase implements ContentEntityStorageInterface, DynamicallyFieldableEntityStorageInterface uses DeprecatedServicePropertyTrait
    class \Drupal\Core\Entity\ContentEntityNullStorage
    
    class \Drupal\Core\Entity\Sql\SqlContentEntityStorage implements EntityBundleListenerInterface, DynamicallyFieldableEntityStorageSchemaInterface, SqlEntityStorageInterface
    class \Drupal\aggregator\FeedStorage implements FeedStorageInterface
    
    class \Drupal\aggregator\ItemStorage implements ItemStorageInterface
    
    class \Drupal\apigee_edge_teams\Entity\Storage\TeamInvitationStorage implements TeamInvitationStorageInterface
    
    class \Drupal\apigee_edge_teams\Entity\Storage\TeamMemberRoleStorage implements TeamMemberRoleStorageInterface
    
    class \Drupal\bibcite_entity\ContributorStorage
    
    class \Drupal\bibcite_entity\ReferenceStorage
    
    class \Drupal\bootstrap_simple_carousel\CarouselItemStorage implements ContentEntityStorageInterface
    
    class \Drupal\build_hooks\DeploymentStorageHandler implements DeploymentStorageHandlerInterface
    
    class \Drupal\business_rules\ScheduleStorage implements ScheduleStorageInterface
    
    class \Drupal\civicrm_entity\CiviEntityStorage
    
    class \Drupal\comment\CommentStorage implements CommentStorageInterface
    
    class \Drupal\commerce\CommerceContentEntityStorage
    
    class \Drupal\commerce_product_bundle\ProductBundleItemStorage implements ProductBundleItemStorageInterface
    
    class \Drupal\commerce_product_bundle\ProductBundleStorage implements ProductBundleStorageInterface
    
    class \Drupal\config_entity_revisions\Entity\Handler\ConfigEntityRevisionsRevisionStorageHandler implements ConfigEntityRevisionsRevisionStorageHandlerInterface
    
    class \Drupal\config_entity_revisions\Entity\Handler\ConfigEntityRevisionsStorage implements ConfigEntityRevisionsStorageInterface
    
    class \Drupal\config_pages\ConfigPagesStorage
    
    class \Drupal\config_pages\ConfigPagesStorage
    
    class \Drupal\consumers\ConsumerStorage
    
    class \Drupal\contact_emails\ContactEmailStorage implements ContactEmailStorageInterface
    
    class \Drupal\course\Storage\CourseObjectFulfillmentStorage
    
    class \Drupal\course\Storage\CourseObjectFulfillmentStorage
    
    class \Drupal\course\Storage\CourseObjectStorage
    
    class \Drupal\course\Storage\CourseObjectStorage
    
    class \Drupal\crop\CropStorage implements CropStorageInterface
    
    class \Drupal\crop\CropStorage implements CropStorageInterface
    
    class \Drupal\data_policy\DataPolicyStorage implements DataPolicyStorageInterface
    
    class \Drupal\easy_email\EasyEmailStorage implements EasyEmailStorageInterface
    
    class \Drupal\entityqueue\EntitySubqueueStorage
    
    class \Drupal\entity_test\EntityTestNoLoadStorage
    
    class \Drupal\entity_test_update\EntityTestUpdateStorage
    
    class \Drupal\event\EventStorage implements EventStorageInterface
    
    class \Drupal\feeds\FeedStorage implements FeedStorageInterface
    
    class \Drupal\file\FileStorage implements FileStorageInterface
    
    class \Drupal\fillpdf\FillPdfFormFieldStorage
    
    class \Drupal\flag\Entity\Storage\FlaggingStorage implements FlaggingStorageInterface
    
    class \Drupal\flag_lists\FlaggingCollectionStorage implements FlaggingCollectionStorageInterface
    
    class \Drupal\formassembly\FormAssemblyStorage
    
    class \Drupal\gdpr_consent\ConsentAgreementStorage implements ConsentAgreementStorageInterface
    
    class \Drupal\gdpr_consent\ConsentAgreementStorage implements ConsentAgreementStorageInterface
    
    class \Drupal\group\Entity\Storage\GroupContentStorage implements GroupContentStorageInterface
    
    class \Drupal\group\Entity\Storage\GroupStorage
    
    class \Drupal\heartbeat\HeartbeatStorage implements HeartbeatStorageInterface
    
    class \Drupal\heartbeat\HeartbeatStreamStorage implements HeartbeatStreamStorageInterface
    
    class \Drupal\homebox\HomeboxLayoutStorage implements HomeboxLayoutStorageInterface
    
    class \Drupal\linkchecker\LinkCheckerStorage
    
    class \Drupal\log\LogStorage implements LogStorageInterface
    
    class \Drupal\media\MediaStorage
    
    class \Drupal\media_entity\MediaStorage implements MediaStorageInterface
    
    class \Drupal\menu_link_content\MenuLinkContentStorage implements MenuLinkContentStorageInterface
    
    class \Drupal\merci_line_item\MerciLineItemStorage implements MerciLineItemStorageInterface
    
    class \Drupal\multiversion\Entity\Storage\Sql\ContentEntityStorage implements ContentEntityStorageInterface uses ContentEntityStorageTrait
    
    class \Drupal\multiversion\Entity\Storage\Sql\ContentEntityStorage implements ContentEntityStorageInterface uses ContentEntityStorageTrait
    
    class \Drupal\multiversion\Entity\Storage\Sql\MediaStorage implements ContentEntityStorageInterface uses ContentEntityStorageTrait
    
    class \Drupal\node\NodeStorage implements NodeStorageInterface
    
    class \Drupal\opigno_calendar_event\CalendarEventStorage
    
    class \Drupal\opigno_module\OpignoAnswerStorage implements OpignoAnswerStorageInterface
    
    class \Drupal\path_alias\PathAliasStorage
    
    class \Drupal\payment\Entity\Payment\PaymentStorage
    
    class \Drupal\pet\PetStorage implements PetStorageInterface
    
    class \Drupal\photos\PhotosImageStorage implements PhotosImageStorageInterface
    
    class \Drupal\poll\PollStorage implements PollStorageInterface
    
    class \Drupal\preview_link\PreviewLinkStorage implements PreviewLinkStorageInterface
    
    class \Drupal\profile\ProfileStorage implements ProfileStorageInterface
    
    class \Drupal\quiz\Storage\QuizQuestionStorage
    
    class \Drupal\quiz\Storage\QuizQuestionStorage
    
    class \Drupal\quiz\Storage\QuizResultAnswerStorage
    
    class \Drupal\quiz\Storage\QuizResultAnswerStorage
    
    class \Drupal\quiz\Storage\QuizStorage
    
    class \Drupal\quiz\Storage\QuizStorage
    
    class \Drupal\relation\RelationStorage
    
    class \Drupal\relation\RelationStorage
    
    class \Drupal\rng\RegistrationStorage
    
    class \Drupal\salesforce_mapping\MappedObjectStorage
    
    class \Drupal\salesforce_mapping\MappedObjectStorage
    
    class \Drupal\simplenews\Subscription\SubscriptionStorage implements SubscriptionStorageInterface
    
    class \Drupal\simplenews\Subscription\SubscriptionStorage implements SubscriptionStorageInterface
    
    class \Drupal\simple_megamenu\SimpleMegaMenuStorage implements SimpleMegaMenuStorageInterface
    
    class \Drupal\sitewide_alert\SitewideAlertStorage implements SitewideAlertStorageInterface
    
    class \Drupal\site_alert\SiteAlertStorage implements SiteAlertStorageInterface
    
    class \Drupal\smart_date_recur\RuleStorage implements RuleStorageInterface
    
    class \Drupal\support_ticket\SupportTicketStorage implements SupportTicketStorageInterface
    
    class \Drupal\taxonomy\TermStorage implements TermStorageInterface
    
    class \Drupal\token_custom\TokenCustomStorage
    
    class \Drupal\uc_cart\CartItemStorage
    
    class \Drupal\uc_order\OrderProductStorage
    
    class \Drupal\user\UserStorage implements UserStorageInterface
    
    class \Drupal\votingapi\VoteResultStorage implements VoteResultStorageInterface
    
    class \Drupal\votingapi\VoteStorage implements VoteStorageInterface
    
    class \Drupal\webform\WebformSubmissionStorage implements WebformSubmissionStorageInterface
    
    class \Drupal\webform_protected_downloads\WebformProtectedDownloadsStorage implements WebformProtectedDownloadsStorageInterface
    
    class \Drupal\workbench_access\SectionAssociationStorage implements SectionAssociationStorageInterface
    
    class \Drupal\workspace\WorkspaceAssociationStorage implements WorkspaceAssociationStorageInterface
    
    class \Drupal\yamlform\YamlFormSubmissionStorage implements YamlFormSubmissionStorageInterface
    
    class \Drupal\ctools_entity_mask\MaskContentEntityStorage
    
    class \Drupal\mongodb\Entity\ContentEntityStorage
  - class \Drupal\Core\Entity\KeyValueStore\KeyValueEntityStorage
- class \Drupal\Core\Entity\EntityViewBuilder implements EntityHandlerInterface, EntityViewBuilderInterface, TrustedCallbackInterface uses DeprecatedServicePropertyTrait
- class \Drupal\Tests\Core\Entity\TestEntityForm
- class \Drupal\Tests\Core\Entity\TestRouteProvider