data class TypeErasure(val type: String) : InaccessibilityReason()

    val explanation
        get() = when (this) {
            is NonPublic -> "`$type` is not public"
            is NonAvailable -> "`$type` is not available"
            is Synthetic -> "`$type` is synthetic"
            is TypeErasure -> "`$type` parameter types are missing"
        }
}