.bootstrapDnsHosts(getByIp("8.8.4.4"), getByIp("8.8.8.8"))
      .build()

  private fun buildGooglePost(bootstrapClient: OkHttpClient): DnsOverHttps =
    DnsOverHttps
      .Builder()
      .client(bootstrapClient)
      .url("https://dns.google/dns-query".toHttpUrl())
      .bootstrapDnsHosts(getByIp("8.8.4.4"), getByIp("8.8.8.8"))
      .post(true)
      .build()

  val bootstrapClient = OkHttpClient.Builder().cache(appCache).build()

  val dns = DnsOverHttps.Builder().client(bootstrapClient)
    .url("https://dns.google/dns-query".toHttpUrl())
    .bootstrapDnsHosts(InetAddress.getByName("8.8.4.4"), InetAddress.getByName("8.8.8.8"))
    .build()

  val client = bootstrapClient.newBuilder().dns(dns).build()
```

    public int getLength() {
        return length;
    }

    /**
     * Get size of this structure
     *
     * @return size in bytes (16)
     */
    public static int size() {
        return 16; // 8 + 4 + 4
    }

    /**
     * Encode this structure to byte array
     *
     * @param dst destination buffer
     * @param dstIndex starting index
     * @return number of bytes written
     */