1074   FORMAT_STRING = ('!QQ')  # tag, num_bytes_following (descriptor header)  variable in AvbDescriptor
1085     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1089           struct.unpack(self.FORMAT_STRING, data[0:self.SIZE]))
1118     desc = struct.pack(self.FORMAT_STRING, self.tag, nbf_with_padding)
1152   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbPropertyDescriptor
1166     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1170        value_size) = struct.unpack(self.FORMAT_STRING, data[0:self.SIZE])
1203     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1251   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbHashtreeDescriptor
1278     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1285        root_digest_len, self.flags, _) = struct.unpack(self.FORMAT_STRING,
1360     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1440   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbHashDescriptor
1459     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1464        digest_len, self.flags, _) = struct.unpack(self.FORMAT_STRING,
1520     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1575   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbKernelCmdlineDescriptor
1592     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1596           struct.unpack(self.FORMAT_STRING, data[0:self.SIZE]))
1632     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1669   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbChainPartitionDescriptor
1685     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1690        public_key_len, _) = struct.unpack(self.FORMAT_STRING, data[0:self.SIZE])
1734     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1833   FORMAT_STRING = ('!4s2L'  # magic, 2 x version.  variable in AvbFooter
1849     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1854        self.vbmeta_size) = struct.unpack(self.FORMAT_STRING, data)
1871     return struct.pack(self.FORMAT_STRING, self.magic, self.version_major,
1892   FORMAT_STRING = ('!4s2L'  # magic, 2 x version  variable in AvbVBMetaHeader
1915     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1928        self.release_string) = struct.unpack(self.FORMAT_STRING, data)
1975         self.FORMAT_STRING, self.magic, self.required_libavb_version_major,
1990     return struct.pack(self.FORMAT_STRING, self.magic,