code: static InetAddress decodeAddress(DnsRecord record, String name, boolean decodeIdn) {
          if (!(record instanceof DnsRawRecord)) {
              return null;
          }
          final ByteBuf content = ((ByteBufHolder) record).content();
          final int contentLen = content.readableBytes();
          if (contentLen != INADDRSZ4 && contentLen != INADDRSZ6) {
              return null;
          }
  
          final byte[] addrBytes = new byte[contentLen];
          content.getBytes(content.readerIndex(), addrBytes);
  
          try {
              return InetAddress.getByAddress(decodeIdn ? IDN.toUnicode(name) : name, addrBytes);
          } catch (UnknownHostException e) {
              // Should never reach here.
              throw new Error(e);
          }
      }
docs: Decodes an {@link InetAddress} from an A or AAAA {@link DnsRawRecord}.
  
  @param record the {@link DnsRecord}, most likely a {@link DnsRawRecord}
  @param name the host name of the decoded address
  @param decodeIdn whether to convert {@code name} to a unicode host name
  
  @return the {@link InetAddress}, or {@code null} if {@code record} is not a {@link DnsRawRecord} or
  its content is malformed