first commit

public/typo3conf/ext/femanager/Classes/DependencyInjection/CompilerPass/ChangeClassDatamapPass.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace In2code\Femanager\DependencyInjection\CompilerPass;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use TYPO3\CMS\Extbase\Persistence\Generic\Mapper\DataMap;
+
+class ChangeClassDatamapPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        if (!$container->hasDefinition(DataMap::class)) {
+            return;
+        }
+
+        $definition = $container->findDefinition(DataMap::class);
+        $definition->setClass(\In2code\Femanager\Persistence\Generic\Mapper\DataMap::class);
+    }
+}