code: def Decompress(self, compressed_data):
      
      try:
        uncompressed_data = self._zlib_decompressor.decompress(compressed_data)
        remaining_compressed_data = getattr(
            self._zlib_decompressor, 'unused_data', b'')
  
      except zlib.error as exception:
        raise errors.BackEndError((
            'Unable to decompress zlib compressed stream with error: '
            '{0!s}.').format(exception))
  
      return uncompressed_data, remaining_compressed_data
docs: Decompresses the compressed data.
  
      Args:
        compressed_data (bytes): compressed data.
  
      Returns:
        tuple(bytes, bytes): uncompressed data and remaining compressed data.
  
      Raises:
        BackEndError: if the zlib compressed stream cannot be decompressed.