class AbstractObjectNormalizerTest extends KernelTestCase
{
    public function testDenormalizeNestedValues()
    {
        $normalizer = self::getContainer()->get(NormalizerInterface::class); // service
        $normalizer->denormalize(['values' => [['1'], ['2'], ['3'], ['4'], ['5']]], TypeClassReproducer::class);
    }
}

class TypeClassReproducer
{
    /**
     * @param array<int, array<int, string>>|null $values
     */
    public function __construct(
        private readonly array|null $values = null,
    ) {
    }
    /** @return array<int, array<int, string>>|null */
    public function getValues(): array|null
    {
        return $this->values;
    }
}