code: def test_old_class_names(self):
      # these were all defined at one point, we want to maintain backwards
      # compat, so we basically just create a checkpoint with this test.
  
      for class_name in OLD_CLASS_NAMES:
          self.assertIsNotNone(getattr(go, class_name, None))
  
file_path: plotly.py/packages/python/plotly/plotly/tests/test_core/test_graph_objs/test_graph_objs.py
imports: from unittest import TestCase
  import plotly.graph_objs
label_desc: Use image node_id 1 for calling the TestBackwardsCompat obj's underlying member method code with example usage: obj.test_old_class_names() without return types