code: def objects_list(self, bucket, prefix=None, delimiter=None, projection='noAcl', versions=False,
                     max_results=0, page_token=None):
      
      if max_results == 0:
        max_results = Api._MAX_RESULTS
  
      args = {'maxResults': max_results}
      if prefix is not None:
        args['prefix'] = prefix
      if delimiter is not None:
        args['delimiter'] = delimiter
      if projection is not None:
        args['projection'] = projection
      if versions:
        args['versions'] = 'true'
      if page_token is not None:
        args['pageToken'] = page_token
  
      url = Api._ENDPOINT + (Api._OBJECT_PATH % (bucket, ''))
      return google.datalab.utils.Http.request(url, args=args, credentials=self._credentials)
docs: Issues a request to retrieve information about an object.
  
      Args:
        bucket: the name of the bucket.
        prefix: an optional key prefix.
        delimiter: an optional key delimiter.
        projection: the projection of the objects to retrieve.
        versions: whether to list each version of a file as a distinct object.
        max_results: an optional maximum number of objects to retrieve.
        page_token: an optional token to continue the retrieval.
      Returns:
        A parsed list of object information dictionaries.
      Raises:
        Exception if there is an error performing the operation.