code: def teardown():
      teardown_test_comm()
  
file_path: catboost/contrib/python/ipywidgets/py2/ipywidgets/widgets/tests/utils.py
imports: from ipykernel.comm import Comm
  from ipywidgets import Widget
label_desc: Use image node_id 4 for calling a global function with example usage: teardown() without return types