code: def test_offset() -> None:
      s = pl.Series([1, 2, 3])
      col = PolarsColumn(s)
      assert col.offset == 0
  
imports: from __future__ import annotations
  from datetime import datetime
  from typing import TYPE_CHECKING
  import pytest
  import polars
  from polars.interchange.column import PolarsColumn
  from polars.interchange.protocol import ColumnNullType, CopyNotAllowedError, DtypeKind
  from polars.testing import assert_series_equal
label_desc: Use image node_id 3 for calling a global function with example usage: test_offset() without return types