code: def is_selector(obj: Any) -> Literal[False]:
      ...
  
imports: from __future__ import annotations
  import re
  from datetime import timezone
  from functools import reduce
  from operator import or_
  from typing import TYPE_CHECKING, Any, Collection, Literal, Mapping, overload
  from polars import functions
  from polars.datatypes import FLOAT_DTYPES, INTEGER_DTYPES, NUMERIC_DTYPES, SIGNED_INTEGER_DTYPES, TEMPORAL_DTYPES, UNSIGNED_INTEGER_DTYPES, Binary, Boolean, Categorical, Date, Datetime, Decimal, Duration, Object, String, Time, is_polars_dtype
  from polars.expr import Expr
  from polars.utils.deprecation import deprecate_nonkeyword_arguments
  from polars.utils.various import is_column
label_desc: Use image node_id 2 for calling a global function with example usage: is_selector(obj) without return types