code: def test_get_buffer_no_validity_or_offsets() -> None:
      s = pl.Series([1, 2, 3])
  
      validity = s._get_buffer(1)
      assert validity is None
  
      offsets = s._get_buffer(2)
      assert offsets is None
  
imports: from typing import cast
  import pytest
  import polars
  from polars.testing import assert_series_equal
label_desc: Use image node_id 2 for calling a global function with example usage: test_get_buffer_no_validity_or_offsets() without return types