code: def test_list_concat_supertype() -> None:
      df = pl.DataFrame(
          [
              pl.Series("a", [1, 2], pl.UInt8),
              pl.Series("b", [10000, 20000], pl.UInt16),
          ]
      )
      assert df.with_columns(
          pl.concat_list(pl.col(["a", "b"])).alias("concat_list")
      )["concat_list"].to_list() == [[1, 10000], [2, 20000]]
  
imports: from __future__ import annotations
  from datetime import date, datetime
  from typing import TYPE_CHECKING
  import pytest
  import polars
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 12 for calling a global function with example usage: test_list_concat_supertype() without return types