code: def test_element_mismatch(self):
      try:
          self.assertEqual(self.map1_1D, self.map4_1D)
          raise AssertionError(
              "Pane mismatch in array data not raised."
          )
      except AssertionError as e:
          if not str(e).startswith(
              "Image not almost equal to 6 decimals\n"
          ):
              raise self.failureException(
                  "Image mismatch error not raised."
              )
  
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 5 for calling the RasterMapComparisonTest obj's underlying member method code with example usage: obj.test_element_mismatch() without return types