Deprecation: #62864 - DataHandler->include_filefunctions deprecated

See Issue #62864

Description

The public property ->include_filefunctions has been marked as deprecated. It has not been formally defined and was only created dynamically in the code.

Impact

In the history of the core this property has never been used (read). Extensions might have used it.

Affected installations

All installations running extensions that rely on reading this property. Currently no affected extensions are known.

Migration

If your extension needs to know whether the BasicFileUtility has been instantiated in DataHandler it could use $datahandler->fileFunc instanceof \TYPO3\CMS\Core\Utility\File\BasicFileUtility