// probably java.lang.IllegalArgumentException: Invalid input to toASCII from IDN.toASCII
      throw IOException("Android internal error", iae)
    }
  }

  @SuppressSignatureCheck
  companion object {
    fun buildIfSupported(): SocketAdapter? = if (isSupported()) Android10SocketAdapter() else null

    fun isSupported() = isAndroid && Build.VERSION.SDK_INT >= 29
  }