code: def test_meta_is_regex_projection() -> None:
      e = pl.col("^.*$").alias("bar")
      assert e.meta.is_regex_projection()
      assert e.meta.has_multiple_outputs()
  
      e = pl.col("^.*")  # no trailing '$'
      assert not e.meta.is_regex_projection()
      assert not e.meta.has_multiple_outputs()
      assert e.meta.is_column()
  
file_path: polars/py-polars/tests/unit/namespaces/test_meta.py
imports: from __future__ import annotations
  from typing import TYPE_CHECKING
  import pytest
  import polars
label_desc: Use image node_id 6 for calling a global function with example usage: test_meta_is_regex_projection() without return types