in multiplatform, if I need to access an internal field in a third (kotlin) library, is reflection the way to go?

@Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")

does the trick, and if eventually the compiler disallows it, then yes reflection would do the trick.

yeah, I saw, but unfortunately the reflection support on MP is almost inexistent..

In general, you should ask the library authors to make it

public

. You don't know when the field will disappear.

yeah, it's not a long term approach