Breaking: #83241 - Extbase: Removed custom functionality for DataMapper->getPlainValue¶
Extbase's DataMapper allowed for wrapping string values in custom user functions via custom parameters.
This was primarily placed in DataMapper for allowing TYPO3's legacy DBAL /
The functionality is now removed, as the Generic Backend is handled via Doctrine DBAL.
DataMapper->getPlainValue() with the third or fourth parameter set will have no effect anymore.
In an VERY unlikely case of using a custom Persistence Backend within Extbase in an extension, some transformations will not work as expected anymore.
Use the transformations outside the DataMapper, if still necessary.