anchor.diff:    , Data
     , Header#header.sync
     ].
  +
  +%%%_* Internal functions =======================================================
   
   %% Raise an exception if meta has a bad format.
   %% Otherwise return the formatted metadata entries
  
positive.code:   DataBytes = make_block(Header, Objects),
    [HeaderBytes, DataBytes].
  
  %%%_* Internal functions =======================================================
  
  -spec encode_header(header()) -> iodata().
  encode_header(Header) ->
    HeaderFields =
  
negative.code:         , decode_binary/2
          , decode_file/1
          , decode_file/2
          , encode_header/1
          , make_block/2
          , make_header/1
          , make_header/2
          , make_ocf/2
  