code: def test_rasterize_datashade_mutually_exclusive(self):
      with self.assertRaises(ValueError):
          scatter_matrix(self.df, rasterize=True, datashade=True)
  
imports: from unittest import TestCase, SkipTest
  import sys
  from parameterized import parameterized
  import numpy
  import pandas
  from holoviews.core import GridMatrix, NdOverlay
  from holoviews.element import Bivariate, Distribution, HexTiles, Histogram, Scatter
  from hvplot import scatter_matrix
label_desc: Use image node_id 2 for calling the TestDatashader obj's underlying member method code with example usage: obj.test_rasterize_datashade_mutually_exclusive() without return types