6 files declare their use of EntityOwnerTrait

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