code: def test_cumsum_horizontal_deprecated() -> None:
      df = pl.DataFrame(
          {
              "a": [1, 2],
              "b": [3, 4],
              "c": [5, 6],
          }
      )
      with pytest.deprecated_call():
          result = df.select(pl.cumsum_horizontal("a", "c"))
      expected = df = pl.DataFrame(
          {"cumsum": [{"a": 1, "c": 6}, {"a": 2, "c": 8}]}
      )
      assert_frame_equal(result, expected)
  
imports: from __future__ import annotations
  import datetime
  from typing import Any
  import pytest
  import polars
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 16 for calling a global function with example usage: test_cumsum_horizontal_deprecated() without return types