code: def test_dimension_mismatch(self):
      try:
          self.assertEqual(self.map1_1D, self.map1_2D)
          raise AssertionError(
              "Mismatch in dimension number not raised."
          )
      except AssertionError as e:
          self.assertEqual(str(e), "Key dimension list mismatched")
  
imports: import numpy
  from holoviews import Image
  from holoviews.core import BoundingBox, Dimension
  from holoviews.core.element import HoloMap
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 1 for calling the RasterMapComparisonTest obj's underlying member method code with example usage: obj.test_dimension_mismatch() without return types