code: def ensure1d(
      x: int | float | Sequence[int | float] | ArrayLike,
      name: Hashable | None,
      series: Literal[True] = ...,
  ) -> Series:
      ...
  
imports: from __future__ import annotations
  from arch.compat.pandas import is_datetime64_any_dtype
  from abc import ABCMeta
  from collections.abc import Hashable, Sequence
  import datetime
  from functools import cached_property
  from typing import Any, Literal, overload
  import numpy
  from pandas import DataFrame, DatetimeIndex, Index, NaT, Series, Timestamp, to_datetime
  from arch.typing import AnyPandas, ArrayLike, DateLike, NDArray
label_desc: Use image node_id 1 for calling a global function with example usage: ensure1d(x, name, series) without return types