v6 example

public function testV5()
    {
        $uuid = Uuid::v5(new UuidV4('ec07aa88-f84e-47b9-a581-1c6b30a2f484'), 'the name');

        $this->assertInstanceOf(UuidV5::class, $uuid);
        $this->assertSame('851def0c-b9c7-55aa-a991-130e769ec0a9', (string) $uuid);
    }

    public function testV6()
    {
        $uuid = Uuid::v6();

        $this->assertInstanceOf(UuidV6::class, $uuid);

        $uuid = new UuidV6(substr_replace(self::A_UUID_V1, '6', 14, 1));

        $this->assertEquals(\DateTimeImmutable::createFromFormat('U.u', '85916308548.278321'), $uuid->getDateTime());
        $this->assertSame('3499710062d0', $uuid->getNode());
    }

    public function testV6IsSeeded()
    {
        

protected function setUp(): void
    {
        $this->normalizer = new UidNormalizer();
    }

    public function testSupportsNormalization()
    {
        $this->assertTrue($this->normalizer->supportsNormalization(Uuid::v1()));
        $this->assertTrue($this->normalizer->supportsNormalization(Uuid::v3(Uuid::v1(), 'foo')));
        $this->assertTrue($this->normalizer->supportsNormalization(Uuid::v4()));
        $this->assertTrue($this->normalizer->supportsNormalization(Uuid::v5(Uuid::v1(), 'foo')));
        $this->assertTrue($this->normalizer->supportsNormalization(Uuid::v6()));
        $this->assertTrue($this->normalizer->supportsNormalization(new Ulid()));
        $this->assertFalse($this->normalizer->supportsNormalization(new \stdClass()));
    }

    public static function normalizeProvider()
    {
        $uidFormats = [null, 'canonical', 'base58', 'base32', 'rfc4122'];
        $data = [
             [
                 UuidV1::fromString('9b7541de-6f87-11ea-ab3c-9da9a81562fc'),
                '9b7541de-6f87-11ea-ab3c-9da9a81562fc',