Deprecation: #63603 - ExtendedFileUtility::$dontCheckForUnique is deprecated 

See forge#63603

Description 

The ExtendedFileUtility $dontCheckForUnique flag has been marked as deprecated and replaced by $fileUtility->setExistingFileConflictMode() with the possible options of the \TYPO3\CMS\Core\Resource\DuplicationBehavior enumeration.

Impact 

Extensions still using ExtendedFileUtility::$dontCheckForUnique will throw a deprecation warning.

Affected Installations 

All installations with extensions that use ExtendedFileUtility::$dontCheckForUnique.

Migration 

Change the $fileUtility->dontCheckForUnique = TRUE to $fileUtility->setExistingFileConflictMode(DuplicationBehavior::REPLACE).