BUG: Type coverage when method override without typehint

[koraga]

Hello!
I catch type coverage error when i extends class from package (vendor folder) which have low type coverage, but have doctype
For example:
https://phpstan.org/r/4901978f-4a9c-404f-8a35-901e90b9b21d

[wimulkeman]

I encountered the same issue when using a interface (in my case the DataTransformerInterface from ApiPlatform). Adding a \ @phpstan-ignore-line did not help for PHPstan noted that their was nothing to ignore.

Maybe this issue can be resolved by making the extension support the ignore comment?