Breaking: #45899 - Split class ImportExport into classes Import and Export¶
See Issue #45899
Class TYPO3CMSImpexpImportExport (typo3/sysext/impexp/Classes/ImportExport.php) has been split into a class dedicated for import and another one for export.
Using and extending the class is not possible anymore.
Extensions using the class and its methods directly or extending the class.
Use or extend one or both of the new classes (TYPO3CMSImpexpImport and TYPO3CMSImpexpExport).