code: def test_multivariate(self):
      n = 2
  
      values1 = np.repeat(self.series1.univariate_values(), n)
      values2 = np.repeat(self.series2.univariate_values(), n)
  
      values1 = values1.reshape((-1, n))
      values2 = values2.reshape((-1, n))
  
      multi_series1 = TimeSeries.from_values(values1)
      multi_series2 = TimeSeries.from_values(values2)
  
      radius = 2
  
      alignment_uni = dtw.dtw(
          self.series1, self.series2, multi_grid_radius=radius
      )
      alignment_multi = dtw.dtw(
          multi_series1, multi_series2, multi_grid_radius=radius
      )
  
      assert np.all(alignment_uni.path() == alignment_multi.path())
  
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 9 for calling the TestDynamicTimeWarping obj's underlying member method code with example usage: obj.test_multivariate() without return types