code: final void warnInvalidRecord(DnsRecordType type, ByteBuf content) {
          if (logger().isWarnEnabled()) {
              final String dump = ByteBufUtil.hexDump(content);
              logger().warn("{} Skipping invalid {} record: {}",
                            logPrefix(), type.name(), dump.isEmpty() ? "<empty>" : dump);
          }
      }
docs: Logs a warning message about an invalid record.