SetNullOnDeleteManyToOneDefinition example

private Connection $connection;

    protected function setUp(): void
    {
        $this->writer = $this->getContainer()->get(EntityWriter::class);
        $this->connection = $this->getContainer()->get(Connection::class);

        $registry = $this->getContainer()->get(DefinitionInstanceRegistry::class);

        $registry->register(new SetNullOnDeleteParentDefinition());
        $registry->register(new SetNullOnDeleteManyToOneDefinition());
        $registry->register(new SetNullOnDeleteChildDefinition());

        $this->repository = new EntityRepository(
            $this->getContainer()->get(SetNullOnDeleteParentDefinition::class),
            $this->getContainer()->get(EntityReaderInterface::class),
            $this->getContainer()->get(VersionManager::class),
            $this->getContainer()->get(EntitySearcherInterface::class),
            $this->getContainer()->get(EntityAggregatorInterface::class),
            $this->getContainer()->get('event_dispatcher'),
            $this->getContainer()->get(EntityLoadedEventFactory::class)
        );