Cedric Ziel

``` In file: file:///home/cedricziel/dpn/project/typo3conf/ext/project/Classes/Domain/Model/Product.php java.lang.IllegalArgumentException: Equal objects must have equal hashcodes. During rehashing, Trove discovered that the following two objects claim to be equal (as in java.lang.Object.equals() or TObjectHashingStrategy.equals()) but...

This should depend on whether the Environment class is available. https://github.com/TYPO3/TYPO3.CMS/commit/84a4568e9c29b4699f8b199a2db51c4e0ce37533

Like moving from `LLL:EXT:lang/locallang_general.xlf` to `LLL:EXT:lang/Resources/Private/Language/locallang_general.xlf`.

That's an epic one and needs at least knowledge of a baseline version for a given extension.