Deprecated: Return type of Symfony\Component\Serializer\Tests\Fixtures\TraversableDummy::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/serializer/Tests/Fixtures/TraversableDummy.php on line 19