code: def test_notebook_with_no_output(tmp_directory, nb_no_output):
      intr = NotebookIntrospector("nb_no_output.ipynb")
      assert dict(intr) == dict()
  
file_path: sklearn-evaluation/tests/nb/test_NotebookIntrospector.py
imports: from sklearn_evaluation import NotebookIntrospector
  from IPython.display import HTML, Image
label_desc: Use image node_id 4 for calling a global function with example usage: test_notebook_with_no_output(tmp_directory, nb_no_output) without return types