docs: def deserialize(self, buffer=bytes(), index=Index(), **options):
          """ De-serializes the `Pointer` field from the byte *buffer* starting
          at the begin of the *buffer* or with the given *index* by mapping the
          bytes to the :attr:`value` of the `Pointer` field in accordance with
          the decoding *byte order* for the de-serialization and the decoding
          :attr:`byte_order` of the `Pointer` field.
  
          The specific decoding :attr:`byte_order` of the `Pointer` field
          overrules the decoding *byte order* for the de-serialization.
  
          Returns the :class:`Index` of the *buffer* after the `Pointer` field.
  
          Optional the de-serialization of the referenced :attr:`data` object of
          the `Pointer` field 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`` a `Pointer` field de-serialize its
              referenced :attr:`data` object as well (chained method call).
              Each :class:`Pointer` field uses for the de-serialization of its
              referenced :attr:`data` object its own :attr:`bytestream`.
          """
          # Field
          index = super().deserialize(buffer, index, **options)
          # Data Object
          if self._data and get_nested(options):
              options[Option.byte_order.value] = self.data_byte_order
              self._data.deserialize(self._data_stream,
                                     Index(0, 0,
                                           self.address, self.base_address,
                                           False),
                                     **options)
          return index