code: def test_plot(self):
      align = dtw.dtw(self.series2, self.series1)
      align.plot()
      align.plot_alignment()
      plt.close()
  
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 8 for calling the TestDynamicTimeWarping obj's underlying member method code with example usage: obj.test_plot() without return types