code: def test_layouttree_comparison_equal(self):
      t1 = self.el1 + self.el2
      t2 = self.el1 + self.el2
      self.assertEqual(t1, t2)
  
file_path: holoviews/holoviews/tests/element/test_comparisoncomposite.py
imports: from holoviews import Element
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 2 for calling the CompositeComparisonTestCase obj's underlying member method code with example usage: obj.test_layouttree_comparison_equal() without return types