When I use `@OptIn` I get the warning "This class ...

# intellij

[diesieben07]

When I use @OptIn I get the warning "This class can only be used with the compiler argument '-Xopt-in=kotlin.RequiresOptIn'his class can only be used with the compiler argument '-Xopt-in=kotlin.RequiresOptIn'".
I added the following in my `build.gradle.kts`:

kotlin {
  targets.all {
    compilations.all {
      kotlinOptions.freeCompilerArgs += "-Xopt-in=kotlin.RequiresOptIn"
    }
  }
}

But the warning remains.

[tim]

I have the same question 🙂

[Alexey Belkov [JB]]

Is this an MPP project? Then https://youtrack.jetbrains.com/issue/KT-37616

[tim]

Mine is not, but will try the suggested approach in the issue comments 🙏

[diesieben07]

Yes, that works! tyvm