docs: def _get_manifest_data(self):
          """
          Return the list of items in the manifest
          :return: list
          """
          with tempfile.NamedTemporaryFile(delete=True) as tmp:
              try:
                  self.s3.download_fileobj(self.sitename, self.manifest_file, tmp)
                  tmp.seek(0)
                  data = tmp.read()
                  if data is not None:
                      return data.split(",")
              except Exception as ex:
                  pass
          return []