code: def deserialize(self, buffer=bytes(), index=Index(), **options):
          
          for item in self.values():
              index = item.deserialize(buffer, index, **options)
          return index
docs: De-serializes the `Structure` from the byte *buffer* starting at
          the begin of the *buffer* or with the given *index* by mapping the
          bytes to the :attr:`~Field.value` for each :class:`Field` in the
          `Structure` in accordance with the decoding *byte order* for the
          de-serialization and the decoding :attr:`byte_order` of each
          :class:`Field` in the `Structure`.
  
          A specific decoding :attr:`~Field.byte_order` of a :class:`Field`
          overrules the decoding *byte order* for the de-serialization.
  
          Returns the :class:`Index` of the *buffer* after the last de-serialized
          :class:`Field` in the `Structure`.
  
          Optional the de-serialization of the referenced :attr:`~Pointer.data`
          objects of all :class:`Pointer` fields in the `Structure` can be
          enabled.
  
          :param bytes buffer: byte stream.
          :param Index index: current read :class:`Index` within the *buffer*.
          :keyword byte_order: decoding byte order for the de-serialization.
          :type byte_order: :class:`Byteorder`, :class:`str`
          :keyword bool nested: if ``True`` all :class:`Pointer` fields of a
              `Structure` de-serialize their referenced :attr:`~Pointer.data`
              object as well (chained method call).
              Each :class:`Pointer` field uses for the de-serialization of its
              referenced  :attr:`~Pointer.data` object its own
              :attr:`~Pointer.bytestream`.