docs: def fill(self, value=b'\xff'):
          """Fill all empty space between segments with given value `value`.
  
          """
  
          previous_segment_maximum_address = None
          fill_segments = []
  
          for address, data in self._segments:
              maximum_address = address + len(data)
  
              if previous_segment_maximum_address is not None:
                  fill_size = address - previous_segment_maximum_address
                  fill_size_words = fill_size // self.word_size_bytes
                  fill_segments.append(_Segment(
                      previous_segment_maximum_address,
                      previous_segment_maximum_address + fill_size,
                      value * fill_size_words,
                      self.word_size_bytes))
  
              previous_segment_maximum_address = maximum_address
  
          for segment in fill_segments:
              self._segments.add(segment)