17 files declare their use of EntityOwnerInterface

CommentInterface.php in core/modules/comment/src/CommentInterface.php
CommentStatistics.php in core/modules/comment/src/CommentStatistics.php
ContentModerationStateInterface.php in core/modules/content_moderation/src/Entity/ContentModerationStateInterface.php
ContentTranslationHandler.php in core/modules/content_translation/src/ContentTranslationHandler.php
DefaultSelection.php in core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php
EntityContentBase.php in core/modules/migrate/src/Plugin/migrate/destination/EntityContentBase.php
EntityReferenceAutocompleteWidget.php in core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php
EntityTest.php in core/modules/system/tests/modules/entity_test/src/Entity/EntityTest.php
FileInterface.php in core/modules/file/src/FileInterface.php
Importer.php in core/lib/Drupal/Core/DefaultContent/Importer.php
LatestRevisionCheck.php in core/modules/content_moderation/src/Access/LatestRevisionCheck.php
LatestRevisionCheckTest.php in core/modules/content_moderation/tests/src/Unit/LatestRevisionCheckTest.php
MediaInterface.php in core/modules/media/src/MediaInterface.php
NodeInterface.php in core/modules/node/src/NodeInterface.php
ResourceTestBase.php in core/modules/jsonapi/tests/src/Functional/ResourceTestBase.php
WorkspaceInterface.php in core/modules/workspaces/src/WorkspaceInterface.php
WorkspaceViewBuilder.php in core/modules/workspaces/src/WorkspaceViewBuilder.php

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