code: def test_sakoe_chiba_window(self):
      window = 2
      alignment = dtw.dtw(
          self.series1,
          self.series2,
          window=dtw.SakoeChiba(window_size=2),
      )
      path = alignment.path()
  
      for i, j in path:
          assert window >= abs(i - j)
  
imports: import matplotlib.pyplot
  import numpy
  import pandas
  import pytest
  from darts.dataprocessing import dtw
  from darts.metrics import dtw_metric, mae, mape
  from darts.timeseries import TimeSeries
  from darts.utils import timeseries_generation
label_desc: Use image node_id 3 for calling the TestDynamicTimeWarping obj's underlying member method code with example usage: obj.test_sakoe_chiba_window() without return types