6 files declare their use of EntityOwnerTrait in Drupal 8

Comment.php in core/modules/comment/src/Entity/Comment.php

ContentModerationState.php in core/modules/content_moderation/src/Entity/ContentModerationState.php

File.php in core/modules/file/src/Entity/File.php

Media.php in core/modules/media/src/Entity/Media.php

Node.php in core/modules/node/src/Entity/Node.php

Workspace.php in core/modules/workspaces/src/Entity/Workspace.php