code: def _parse_manifest(self):
          
          with open(self.manifest_file, 'r') as f:
              for line in f:
                  if line.startswith("Version"):
                      self.mver, self.relnum = self._parse_version(line)
                  lineitems = line.split('  ')
                  if len(lineitems) == 2:
                      asset_url = self._get_url(lineitems[1][:-1])
                      yield grequests.get(asset_url, stream=True)
docs: Read the defined file, parse and set Version line, and return generator of filenames.