2266             node,

  2266             node,

  2267             sidedata_offset,

  2267             sidedata_offset,

  2268             len(serialized_sidedata),

  2268             len(serialized_sidedata),

  2269         )

  2269         )

  2270 

  2270 

  2274         self.index.append(e)

  2271         self.index.append(e)

  2275         entry = self.index.entry_binary(curr)

  2272         entry = self.index.entry_binary(curr)

  2276         if curr == 0:

  2273         if curr == 0:

  2277             header = self._format_flags | self._format_version

  2274             header = self._format_flags | self._format_version

  2278             header = self.index.pack_header(header)

  2275             header = self.index.pack_header(header)