code: def download(self, streamed=False, action=None, chunk_size=1024, **kwargs):
          
          path = '/projects/%s/export/download' % self.project_id
          result = self.manager.gitlab.http_get(path, streamed=streamed,
                                                raw=True, **kwargs)
          return utils.response_content(result, streamed, action, chunk_size)
docs: Download the archive of a project export.
  
          Args:
              streamed (bool): If True the data will be processed by chunks of
                  `chunk_size` and each chunk is passed to `action` for
                  reatment
              action (callable): Callable responsible of dealing with chunk of
                  data
              chunk_size (int): Size of each chunk
              **kwargs: Extra options to send to the server (e.g. sudo)
  
          Raises:
              GitlabAuthenticationError: If authentication is not correct
              GitlabGetError: If the server failed to perform the request
  
          Returns:
              str: The blob content if streamed is False, None otherwise