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MessageAndOffset => Offset MessageSize Offset Message
  MessageSizeOffset => int32int64
  OffsetMessageSize => int64int32
 
  Message => Crc MagicByte Attributes KeyLength Key ValueLength Value
    Crc => int32
    MagicByte => int8
    Attributes => int8
    KeyLength => int32
    Key => bytes
    ValueLength => int32
    Value => bytes

MessageAndOffset => Offset MessageSize Offset Message
  MessageSizeOffset => int32int64
  OffsetMessageSize => int64
int32

  Message => Crc MagicByte Attributes KafkaTagLength [KafkaTag] AppTagLength [AppTag] KeyLength Key ValueLength Value
    Crc => int32
    MagicByte => int8
    Attributes => int8
    SentTime => int32
    ReceiptTime => int32

    KafkaTagLength = > int32
    KafkaTag => 
      KafkaTagId => int8
      TagValue => [different types]

    AppTagLength = > int32
    AppTag => 
      AppTagKeyLength => int32
      AppTagKey => bytes
      AppTagValueLength => int32
      AppTagValue => bytes

    KeyLength => int32
    Key => bytes
    ValueLength => int32
    Value => bytes