code: def extend_index(steps: int, index: pd.Index) -> pd.Index:
      return DeterministicTerm._extend_index(index, steps)
  
imports: from typing import TYPE_CHECKING, Optional
  import numpy
  import pandas
  from scipy import stats
  from statsmodels.iolib.summary import Summary
  from statsmodels.iolib.table import SimpleTable
  from statsmodels.tools.validation import array_like, bool_like, float_like, int_like, string_like
  from statsmodels.tsa.deterministic import DeterministicTerm
  from statsmodels.tsa.seasonal import seasonal_decompose
  from statsmodels.tsa.statespace.exponential_smoothing import ExponentialSmoothing
  from statsmodels.tsa.statespace.sarimax import SARIMAX
  from statsmodels.tsa.stattools import acf
  from statsmodels.tsa.tsatools import add_trend, freq_to_period
label_desc: Use image node_id 1 for calling a global function with example usage: extend_index(steps, index) and returns: DeterministicTerm