getTranslationUnitDecl return nullptr on MacOS
https://invent.kde.org/sdk/clazy/-/blob/master/src/Clazy.cpp#L180 this returns nullptr on MacOS Big Sur 11.5.2
So the checks are not run. I believe it has something to do with Apple Clang. A example clang plugin build with llvm source works as expected (but not with Apple clang).