code: def pytest_collection_modifyitems(
      config: pytest.Config, items: Sequence
  ) -> None:
      # mark dask tests as `mgpu`.
      mgpu_mark = pytest.mark.mgpu
      for item in items:
          item.add_marker(mgpu_mark)
  
label_desc: Use image node_id 1 for calling a global function with example usage: pytest_collection_modifyitems(config, items) without return types