16 files declare their use of RevisionableInterface in Drupal 9

BulkForm.php in core/modules/views/src/Plugin/views/field/BulkForm.php

EntityAccessChecker.php in core/modules/jsonapi/src/Access/EntityAccessChecker.php

EntityOperations.php in core/modules/workspaces/src/EntityOperations.php

EntityResource.php in core/modules/jsonapi/src/Controller/EntityResource.php

EntityUrlTest.php in core/tests/Drupal/Tests/Core/Entity/EntityUrlTest.php

EntityValidationException.php in core/modules/migrate/src/Exception/EntityValidationException.php

InlineBlockEntityOperations.php in core/modules/layout_builder/src/InlineBlockEntityOperations.php

KeyValueContentEntityStorage.php in core/lib/Drupal/Core/Entity/KeyValueStore/KeyValueContentEntityStorage.php

LabelOnlyResourceObject.php in core/modules/jsonapi/src/JsonApiResource/LabelOnlyResourceObject.php

quickedit.module in core/modules/quickedit/quickedit.module

Provides in-place content editing functionality for fields.

ResourceObject.php in core/modules/jsonapi/src/JsonApiResource/ResourceObject.php

ResourceResponseTestTrait.php in core/modules/jsonapi/tests/src/Functional/ResourceResponseTestTrait.php

ResourceTestBase.php in core/modules/jsonapi/tests/src/Functional/ResourceTestBase.php

VersionByRel.php in core/modules/jsonapi/src/Revisions/VersionByRel.php

WorkspaceAssociation.php in core/modules/workspaces/src/WorkspaceAssociation.php

WorkspaceAssociationInterface.php in core/modules/workspaces/src/WorkspaceAssociationInterface.php