code: def test_ndjson_null_buffer() -> None:
      data = io.BytesIO(
          b"""\
      {"id": 1, "zero_column": 0, "empty_array_column": [], "empty_object_column": {}, "null_column": null}
      {"id": 2, "zero_column": 0, "empty_array_column": [], "empty_object_column": {}, "null_column": null}
      {"id": 3, "zero_column": 0, "empty_array_column": [], "empty_object_column": {}, "null_column": null}
      {"id": 4, "zero_column": 0, "empty_array_column": [], "empty_object_column": {}, "null_column": null}
      """
      )
  
      assert pl.read_ndjson(data).schema == OrderedDict(
          [
              ("id", pl.Int64),
              ("zero_column", pl.Int64),
              ("empty_array_column", pl.List(pl.Null)),
              (
                  "empty_object_column",
                  pl.Struct([pl.Field("", pl.Null)]),
              ),
              ("null_column", pl.Null),
          ]
      )
  
imports: from __future__ import annotations
  import datetime
  import io
  import json
  from collections import OrderedDict
  from io import BytesIO
  from typing import TYPE_CHECKING, Any
  import pytest
  import polars
  from polars.testing import assert_frame_equal
label_desc: Use image node_id 24 for calling a global function with example usage: test_ndjson_null_buffer() without return types