Steps to reproduce

1. Start dragging any file around in the files app

Expected behaviour

No deprecated warning in developer console

Actual behaviour

Deprecated warning message in the developer console:
DEPRECATED: please use lazyLoadPreview() from an OCA.Files.FileList instance

Found because of issue #5349 in /core/apps/files/js/files.js#L369L372

Server configuration

Nextcloud version: 12.0.0.29
Updated from an older Nextcloud/ownCloud or fresh install: Fresh