code: def test_grouped_size_1_groups_9_elements():
      actual = list(grouped(1, [1, 2, 3, 4, 5, 6, 7, 8, 9]))
      expected = [[1], [2], [3], [4], [5], [6], [7], [8], [9]]
      assert actual == expected
  
imports: from hailtop.utils import partition, url_basename, url_join, url_scheme, url_and_params, parse_docker_image_reference, grouped
  from hailtop.utils.utils import digits_needed, unzip, filter_none, flatten
label_desc: Use image node_id 12 for calling a global function with example usage: test_grouped_size_1_groups_9_elements() without return types