code: def _GetUncompressedStreamSize(self):
      
      self._file_object.seek(0, os.SEEK_SET)
  
      self._decompressor = self._GetDecompressor()
      self._uncompressed_data = b''
  
      compressed_data_offset = 0
      compressed_data_size = self._file_object.get_size()
      uncompressed_stream_size = 0
  
      while compressed_data_offset < compressed_data_size:
        read_count = self._ReadCompressedData(self._COMPRESSED_DATA_BUFFER_SIZE)
        if read_count == 0:
          break
  
        compressed_data_offset += read_count
        uncompressed_stream_size += self._uncompressed_data_size
  
      return uncompressed_stream_size
docs: Retrieves the uncompressed stream size.
  
      Returns:
        int: uncompressed stream size.