code: def test_null_list_construction_and_materialization() -> None:
      s = pl.Series([None, []])
      assert s.dtype == pl.List(pl.Null)
      assert s.to_list() == [None, []]
  
imports: from __future__ import annotations
  import pickle
  from datetime import date, datetime, time
  from typing import TYPE_CHECKING, Any
  import pandas
  import pytest
  import polars
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 26 for calling a global function with example usage: test_null_list_construction_and_materialization() without return types