// WITH_RUNTIME

@Suppress("OPTIONAL_DECLARATION_USAGE_IN_NON_COMMON_SOURCE")
@kotlin.jvm.JvmInline
value class Wrapper(val id: Int)

class DMap(private val map: Map<Wrapper, String>) :
        Map<Wrapper, String> by map

fun box(): String {
    val dmap = DMap(mutableMapOf(Wrapper(42) to "OK"))
    return dmap[Wrapper(42)] ?: "Fail"
}