code: def test_struct_concat_list() -> None:
      assert pl.DataFrame(
          {
              "list_struct1": [
                  [{"a": 1, "b": 2}, {"a": 3, "b": 4}],
                  [{"a": 1, "b": 2}],
              ],
              "list_struct2": [
                  [{"a": 6, "b": 7}, {"a": 8, "b": 9}],
                  [{"a": 6, "b": 7}],
              ],
          }
      ).with_columns(
          [
              pl.col("list_struct1")
              .list.concat("list_struct2")
              .alias("result")
          ]
      )[
          "result"
      ].to_list() == [
          [
              {"a": 1, "b": 2},
              {"a": 3, "b": 4},
              {"a": 6, "b": 7},
              {"a": 8, "b": 9},
          ],
          [{"a": 1, "b": 2}, {"a": 6, "b": 7}],
      ]
  
imports: from __future__ import annotations
  from dataclasses import dataclass
  from datetime import datetime, time
  from typing import TYPE_CHECKING
  import pandas
  import pyarrow
  import pytest
  import polars
  import polars.selectors
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 21 for calling a global function with example usage: test_struct_concat_list() without return types