I’m trying to mock some expect/`actual` types with a KSP plugin, but the `actual` type on iOS requir...

# ios

[Jacob Rhoda]

I’m trying to mock some expect/`actual` types with a KSP plugin, but the actual type on iOS requires an @OptIn(ExperimentalForeignApi::class) annotation on one method. I can do this with

sourceSets {
  all {
    languageSettings.optIn("kotlinx.cinterop.ExperimentalForeignApi")
  }
}

However, this seems wrong. I really only need to do this for the test sources, which are generated by KSP. How do I add this compiler flag just for compiling the test source set on iOS?