When copying Ds Sequence phpstan thinks the result is not Sequence but parent Collection #5638
Description
Bug report
\Ds\Sequence::copy() produces Sequence. PHPStan widens the type to Collection
I checked the stubs and it all looks fine, can't spot the error 🤔
Code snippet that reproduces the problem
https://phpstan.org/r/60352de3-d6df-4634-83a6-2104febe575e
Expected output
No errors
I waited until phpstan/phpstan-src#675 was deployed to playground but it did not fix it.