code: def alpha_guard(**decay_param: float) -> bool:
      """Protects against unnecessary noise in small number regime."""
      if not next(iter(decay_param.values())):
          return True
      alpha = _prepare_alpha(**decay_param)
      return ((1 - alpha) if round(alpha) else alpha) > 1e-6
  
file_path: polars/py-polars/tests/parametric/test_series.py
imports: from __future__ import annotations
  from typing import Any
  from hypothesis import given, settings
  from hypothesis.strategies import booleans, floats, sampled_from
  import polars
  from polars.expr.expr import _prepare_alpha
  from polars.testing import assert_series_equal
  from polars.testing.parametric import series
label_desc: Use image node_id 1 for calling a global function with example usage: alpha_guard() and returns: unknown, True