these were not in the usage search because PhpStorm decided to refer to ChunkLoader->getLevel() for any Player references, which caused them to only show when that was searched.
There's also an undetected LSP violation with ChunkLoader because it requires returning Level and Position->getLevel() returns Level|null. I don't know why PHPStan doesn't complain about that.
we really need the level 8 checks on new code now, and waiting until old code is clean is not going to benefit us much because the issues that are there already exist.