## Bug report ### Code snippet that reproduces the problem ~~https://phpstan.org/r/300ff36e-7d60-4ba6-8866-475aff2ba4b8~~ https://phpstan.org/r/efe25f04-01d5-4e5d-882f-aa0fb3695412 ### Expected output The resulting type should be CustomCollection<int, int>
Bug report
Code snippet that reproduces the problem
https://phpstan.org/r/300ff36e-7d60-4ba6-8866-475aff2ba4b8https://phpstan.org/r/efe25f04-01d5-4e5d-882f-aa0fb3695412
Expected output
The resulting type should be CustomCollection<int, int>