code: def test_histogram_ellipsis_slice_value_missing(self):
      frequencies, edges = np.histogram(range(20), 20)
      with self.assertRaises(IndexError):
          hv.Histogram((frequencies, edges))[..., "Non-existent"]
  
imports: import numpy
  import holoviews
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 9 for calling the TestEllipsisCharts obj's underlying member method code with example usage: obj.test_histogram_ellipsis_slice_value_missing() without return types